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Zf Friedrichshafen Ag patents (2017 archive)


Recent patent applications related to Zf Friedrichshafen Ag. Zf Friedrichshafen Ag is listed as an Agent/Assignee. Note: Zf Friedrichshafen Ag may have other listings under different names/spellings. We're not affiliated with Zf Friedrichshafen Ag, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "Z" | Zf Friedrichshafen Ag-related inventors


Hydraulic valve system of a parking lock device

An electrohydraulic transmission control system (1) includes a parking lock valve (2). The electrohydraulic transmission control system (1) is configured such that, during normal operation of the electrohydraulic transmission control system (1) in which at least one electrohydraulic pressure adjuster (edssys) is actuatable with current, the parking lock valve (2) can be held in a defined operating state in which an actuation pressure (p_sys) acts on a parking lock cylinder (3) above a normal pressure level. ... Zf Friedrichshafen Ag

Method for operating a drive train for a mobile vehicle

With a torque-controlled internal combustion engine and a variable-speed transmission having fixed shift gear ratios, during a shift, the internal combustion engine is controlled in such manner that the drive output torque of the transmission remains the same before and after the shift.. . ... Zf Friedrichshafen Ag

Hydraulic valve system for actuating a parking lock device

An electrohydraulic transmission control system having a parking lock valve by which a parking lock cylinder of a parking lock device can be charged with an actuation pressure adjustable in an operating-state-dependent manner by at least one pilot pressure adjustable in the region of an electrohydraulic pressure adjuster and/or one pressure source. Above a defined actuation pressure level, the parking lock valve can be held in a defined operating state in which the actuation pressure can be applied to the parking lock cylinder. ... Zf Friedrichshafen Ag

Clutch disk with torsional angular-dependent friction damping device

. . A torsion damper with at least one torque input disk and at least one torque output disk, wherein the torque input disk can move in circumferential direction relative to the torque output disk against the force of at least one spring storage, wherein the relative movement is damped by a friction device which generates a smaller friction torque in a first swivel angle range than in a second swivel angle range in that the friction device has at least two friction ring pairs which are rotatable opposite one another and which are activated depending on the swivel angle via a driving connection of at least one friction ring with the torque input disk. The driving connection has a spring element which is arranged functionally in series with the friction device and functionally in parallel with the spring storage.. ... Zf Friedrichshafen Ag

Compact planetary gearbox

A transmission having at least one planetary stage (101), at least one spur gear stage (103) and a transmission housing (117). The planetary stage (101) includes a planetary carrier (107) mounted to rotate, one or more planetary gearwheels (109) mounted to rotate on the planetary carrier (107), and a rotatable sun gear (113). ... Zf Friedrichshafen Ag

Clutch and motor vehicle

A clutch for a motor vehicle with a wear compensation mechanism which includes a sensor element for detecting wear, wherein the sensor element is formed of a plurality of parts, and at least two sensor component parts are rotatably connected to one another.. . ... Zf Friedrichshafen Ag

Inductive position determination

A device for inductive position determination comprises a coil, a positional element, a scanning device for determining an inductance of the coil and an evaluation device for determining a position of the positional element in relation to the coil, based on the inductance determined. In certain embodiments, the positional element comprises a ferromagnetic and electrically insulated material.. ... Zf Friedrichshafen Ag

Power split transmission

A power split transmission which has a first part (2) and a second part (22) the first part (2) includes a variator (10), a summing gearset (6) and a shiftable transmission gear assembly (18). A standard transmission can be used as the multispeed transmission (23).. ... Zf Friedrichshafen Ag

Power shift transmission for an agricultural machine

A powershift transmission for agricultural machines, which is of modular design and has a first part (1) with a splitter group (3) and a second part (2) with a multi-speed transmission (4). The splitter group (3) is designed such that the rotational direction of the input shaft (5) and the rotational direction of the output shaft (8) remain the same, even when shifts are carried out in the splitter group (3).. ... Zf Friedrichshafen Ag

Gearing for a motor vehicle, and a drive train with same

A transmission for a motor vehicle has an input shaft, output shaft, first and second minus planetary gear sets, and first electric machine with a rotationally fixed stator and a rotatable rotor connectable to the input shaft. The first planetary gear set is stepped and has planet gears of a larger and a smaller effective diameter. ... Zf Friedrichshafen Ag

Shaft-hub connection of a double gear on a transmission shaft

A shaft-hub connection of a double gearwheel (2) on a transmission shaft (5), in which the double gearwheel (2) has a first gearwheel (3) and a second gearwheel (4), which are connected to one another in a rotationally fixed manner. The shaft-hub connection is in the form of a shrink fit (7) between a hub (8) of the first gearwheel (3) and the transmission shaft (5). ... Zf Friedrichshafen Ag

Method for operating a vehicle drive train

A method for operating a vehicle drivetrain (1) includes decoupling, in the presence of a demand for realizing a sailing operating state of the vehicle drivetrain (1) during which a drive machine (2) is active and the power flow between the drive machine (2) and a drive output (3) is disconnected in a gearbox (4), the active drive machine (2) from the drive output (3) by opening of one of a plurality of shift elements (a to f) that is held in a closed operating state in order to realize the operating state present before the demand for decoupling of the active drive machine (2). The method also includes then actuating the plurality of shift elements (a to f) in a manner dependent on the present operating state profile of the vehicle drivetrain (1) and with the active drive machine (2) decoupled from the drive output (3).. ... Zf Friedrichshafen Ag

Method for operating a vehicle drive train with a drive motor, an output and a transmission which is arranged between the drive motor and the output

A method for operating a vehicle drivetrain (1) includes proceeding, in the presence of the demand for activation of the engine start-stop function of the vehicle drivetrain (1) and a simultaneously shut-down drive machine (2), from an operating state of the vehicle drivetrain (1) during which a sailing operating function of the vehicle drivetrain (1) is active, during which the drive machine (2) is decoupled from the drive output (3), during which the positively engaging shift element (f) is open and during which a rotational speed (n_ab) of the drive output (3) is higher than a defined rotational speed at which a rotational speed difference between shift element halves of the positively engaging shift element (f) lies within a rotational speed range within which the positively engaging shift element (f) is transferrable into the closed operating state, and actuating the positively engaging shift element (f) in a closing direction no later than when the defined rotational speed is reached.. . ... Zf Friedrichshafen Ag

Damping valve for a vibration damper

Damping valve having a damping valve body with at least one passage channel between two cover sides. An outlet opening of the passage channel leads into a cover-side annular channel which is limited by an outer annular valve support surface and by an inner annular valve support surface, the at least one annular valve support surface for at least one valve disk has a substantially constant width along the circumference, and the annular channel has a varying width along the circumference, and at least one valve support surface has a varying radius of curvature along the circumference.. ... Zf Friedrichshafen Ag

11/23/17 / #20170334421

Method for operating a vehicle drive train

A method for operating a vehicle drivetrain (1) having a drive machine (2), an output (3) and a gearbox (4) with the gearbox (4) arranged in power flow between the drive machine (2) and the output (3) includes opening, in the presence of a demand for activation of a sailing operating function of the vehicle drivetrain (1) and a simultaneously activated engine start-stop function, a positively engaging shift element (f) while the drive machine (2) is left both decoupled from the output (3) and shut down.. . ... Zf Friedrichshafen Ag

11/23/17 / #20170334393

Securing of a motor vehicle

A method for checking a motor vehicle comprises steps for transmitting an id stored in an electronic control device of a transmission of the motor vehicle, to a central facility, the comparison on the part of the central facility of the id with stored ids assigned to specific motor vehicles, the transmission of a notification regarding the comparison result from the central facility to the control device, and the issuing on the part of the control device of a signal, if the id has been located in the stored ids. The communication comprises an authentication of the central facility thereby.. ... Zf Friedrichshafen Ag

11/16/17 / #20170332482

Electrical circuit and method for producing an electrical circuit

One general aspect of the present disclosure includes an electrical circuit with a circuit carrier, at least one electrical component arranged on the circuit carrier, and at least one data transmission device with an antenna section. The data transmission device may be configured for wireless transmission of data and may include a housing, where the at least one electrical component, the at least one data transmission device, and at least one section of the circuit carrier are at least partially enclosed by the housing. ... Zf Friedrichshafen Ag

11/16/17 / #20170328437

Sealing/guiding unit

A seal guide unit for guiding and sealing a piston rod of a vibration damper having a first guide element and a second guide element fixedly connected to the first guide element and arranged coaxial to the first guide element, and a radially moveable piston rod seal arrangement arranged coaxially between the two guide elements and is at least indirectly surrounded in circumferential direction by at least one guide element, including a defined radial annular gap, and comes in at least indirect axial contact with at least one guide element. The piston rod seal arrangement includes a piston rod seal and a sliding element which encloses the piston rod seal in circumferential direction and axially limits the piston rod seal at least on one side. ... Zf Friedrichshafen Ag

11/16/17 / #20170328419

Jaw clutch

The invention relates to a dog clutch (10) with an axially fixed coupling element (12) and an axially movable coupling element (14), in which the axially fixed coupling element (12) and the axially movable coupling element (14) are configured to be sleeve-shaped and are disposed coaxially to one another, in which the axially movable coupling element (14) is axially displaceable by means of a pressurizing medium-actuatable piston (22) to establish a positively locking connection with the axially fixed coupling element (12), in which the piston (22) is disposed in a longitudinally displaceable manner in a cylinder housing (20), which radially on the outside carries the axially movable coupling element (14), in which the piston (22) is connected to the axially movable coupling element (14) via a piston pin (26), and in which a pressurizing medium (40) can be supplied to the cylinder space (60) of the cylinder housing (20) via a supply duct (38), wherein, at one axial end, the piston (22) is permanently connected to a coaxially aligned sensor bolt (48) and, on a sensor section (52) in the area of its free, piston-remote axial end (78), the sensor bolt (48) is configured as a transmitter element for a position sensor (70).. . ... Zf Friedrichshafen Ag

11/09/17 / #20170321798

Gearshift device for a vehicle transmission and method for determining a selector lever position in a gearshift device for a vehicle transmission

The disclosure relates to a shifting device for a vehicle transmission. The shifting device comprises a gearshift lever for selecting a transmission setting of the vehicle transmission, wherein the gearshift lever can move along at least one first shift gate and one second shift gate, a marking element mechanically coupled to the gearshift lever, having at least one first marking line dedicated to the first shift gate and one second marking line dedicated to the second shift gate, a guide assembly, which is configured to guide the marking element along the first marking line to a detection position when the gearshift lever is moved along the first shift gate, and to move the marking element along the second marking line to the detection position when the gearshift lever is moved along the second shift gate, and lastly, a detection device, which is disposed at the detection position and is configured to create a movement signal representing a movement of the first marking line and/or the second marking line in relation to the detection position, in order to determine a position of the gearshift lever in the first shift gate and/or the second shift gate.. ... Zf Friedrichshafen Ag

11/09/17 / #20170321762

Clutch disk for a motor vehicle

A clutch disk (10) for a motor vehicle includes at least two axially opposed friction linings (18), a lining spring (16) and a drive carrier disk (14) with a spring window (24), wherein the lining spring (16) has at least one fastening portion (16a), a supporting portion (16b) and a plurality of spring segments (16c) arranged adjacent to one another in circumferential direction, and the spring segments (16c) are arranged radially outside at the supporting portion (16b) of the lining spring (16), and the fastening portion (16a) is arranged radially inside at the supporting portion (16b).. . ... Zf Friedrichshafen Ag

11/09/17 / #20170321761

Clutch disk for a motor vehicle

A clutch disk (10) for a motor vehicle includes at least two axially opposed friction linings (18), a lining spring (16) and a drive carrier disk (14), wherein the lining spring (16) has at least one fastening portion (16a), a supporting portion (16b) and a plurality of spring segments (16c) arranged adjacent to one another in circumferential direction, and the spring segments (16c) are arranged radially outside at the supporting portion (16b) of the lining spring (16), and the fastening portion (16a) is arranged radially inside at the supporting portion (16b).. . ... Zf Friedrichshafen Ag

11/09/17 / #20170320386

Planetary multi-stage transmission

Proposed is a multi-stage transmission in planetary design in a housing (9) for a vehicle comprising at least one electric motor (em) and comprising three planetary gear sets (rs1, rs2, rs3), wherein a drive (an) can be connected by means of a shift element (k0) to a first shaft (1), and an output (ab) is connected to a second shaft (2), wherein there are provided four additional shafts (3, 4, 5, 6) and at least five shift elements (b1, k1, k2, k3, k4), through the actuation of which at least eight forward gears (g1, g2, g3, g4, g5, g6, g7, g8) can be implemented. According to the invention, the first element of the first planetary gear set (rs1) is connected to the housing (9), wherein the first shaft (1) is permanently connected to the second element of the first planetary gear set (rs1); wherein the rotor (10) of the electric motor (em) is connected to the third element of the first planetary gear set (rs1); and wherein the third element of the first planetary gear set (rs1) can be connected by means of at least one shift element (k3, k4) to at least one element of at least one additional planetary gear set (rs2, rs3).. ... Zf Friedrichshafen Ag

11/09/17 / #20170320369

Mechanical component having a force sensor

A mechanical component for a vehicle, having a measurement region with a surface, and a force sensor is associated with the measurement region for detecting a force to which the component is exposed. The force sensor includes a layer of carbon nanotubes applied to the surface of the measurement region.. ... Zf Friedrichshafen Ag

10/26/17 / #20170311459

Arrangement for making contact with a printed circuit board

The present disclosure pertains to an arrangement comprising a housing, a circuit board arranged in the housing and at least one flat contact to connect the circuit board with an electrical component arranged outside of the housing, whereby the housing has a breakthrough that the flat contact protrudes from, whereby the circuit board has breakthrough that the flat contact reaches through, that the circuit board has a contact tab on the side facing away from the housing breakthrough and whereby a molded seal is inserted in the housing breakthrough and the molded seal positively encloses the flat contact and whereby the contact tab is connected with the flat contact in an electrically conductive manner.. . ... Zf Friedrichshafen Ag

10/26/17 / #20170310118

Inductive position determination

A device for the inductive positioning comprises a signal generator, a coil connected with the signal generator, an element for influencing the inductance of the coil depending on its distance to the coil and an evaluator to determine the position of the element with regard to the coil on the basis of a voltage on the coil. The signal generator thereby provides a square wave signal.. ... Zf Friedrichshafen Ag

10/26/17 / #20170309539

Control device and method for monitoring a function of a semiconductor component during the operation thereof and electrical assembly having a control device

A control device for monitoring a functioning of a semiconductor component during its operation may comprise an input interface configured for receiving a sensor signal corresponding to a contact-less determined temperature distribution on a surface of the semiconductor component, and an evaluation device configured to determine, based on the sensor signal, whether the temperature distribution fulfills a predefined decision criterion corresponding to an operation of the semiconductor component outside a normal operating state. An output interface is designed to issue an emergency signal when the decision criterion is fulfilled, wherein the emergency signal triggers the execution of an emergency measure.. ... Zf Friedrichshafen Ag

10/26/17 / #20170307080

Parking lock device for a motor vehicle

In one aspect, the present disclosure provides a parking brake device for a motor vehicle. The device may include a vehicle transmission including a parking lock and a gear selector lever coupled with the parking lock, where the gear selector lever is movable into a parking lock position for engaging the parking lock, and where the gear selector lever is movable out of the parking lock position for disengaging the parking lock. ... Zf Friedrichshafen Ag

10/26/17 / #20170307071

Method for operating a drivetrain of a motor vehicle, and drivetrain module of motor vehicle of said type

A method for operating a drivetrain of a motor vehicle, includes, when the motor vehicle is at a standstill and upon demand for a drive torque of the motor vehicle, increasing power (25p) supplied to a separate electric pump drive (25) such that a pressure chamber whose pressurization effects a complete closure or lock-up of a launch element (3) is fast charged with hydraulic pressure from a pump (24). The method also includes performing a launch process of the motor vehicle with the drive source (1) and with a closed or locked-up launch element (3) and reducing the power (25p) supplied to the separate electric pump drive (25) after fast charging the pressure chamber. ... Zf Friedrichshafen Ag

10/26/17 / #20170307067

Coupling device for a gearshift lever, gearshift lever device, and method for producing a coupling device

A coupling device for a shift lever of a motor vehicle shift lever device includes a moving sliding element having a receiver for accommodating a section of a shift lever and a guide for guiding a two-dimensional movement of the sliding element. The guide has at least one guide element with which the sliding element is engaged. ... Zf Friedrichshafen Ag

10/26/17 / #20170307064

Planetary gearing

A planetary transmission includes a planetary gear set (1), another planetary gear set (2), a fluid line (3) through which fluid is flowable to the planetary gear set (1) and to the other planetary gear set (2), and a fluid collecting device (4) which is in fluid communication with the fluid line (3). The fluid collecting device (4) is connected in a rotationally fixed manner to the planetary gear set (1). ... Zf Friedrichshafen Ag

10/26/17 / #20170307055

Transmission arrangement

A transmission (ga) for an axle drive (1) of a motor vehicle includes a drive shaft (an), two output shafts (ab1, ab2), at least four shafts (w1, w2, w3, w4), a differential, and two interconnected planetary gear sets (ps1, ps2). The drive shaft (an) is a hollow shaft, and the drive shaft (an) is coaxial with at least one of the two output shafts (ab1, ab2). ... Zf Friedrichshafen Ag

10/26/17 / #20170307030

Method for operating a drive train of a motor vehicle, and drive train module of said motor vehicle

A method for operating a drive train of a motor vehicle includes performing a startup operation of the motor vehicle or a stopping operation of the motor vehicle. A starting component (3) is engaged or bridged during the startup operation or the stopping operation of the motor vehicle. ... Zf Friedrichshafen Ag

10/26/17 / #20170305223

Structural component for a motor vehicle

A structural component for a motor vehicle, with a component body (2) made from a sheet, which includes at least one shell-shaped body portion (3) formed from the sheet and at least one receiving bush (6) formed from the sheet that extends along its circumference between first and second circumferential ends (4, 5), which at the first circumferential end (4) merges into the shell-shaped body portion (3) and at the second circumferential end (5) merges into a strengthening strip (7) formed from the sheet and attached to the shell-shaped body portion (3). The strengthening strip (7) completes the shell-shaped body portion (3) to form an at least partially closed hollow section (8).. ... Zf Friedrichshafen Ag

10/12/17 / #20170294776

Electronic unit comprising an esd protective arrangement

The disclosure relates to an electronic unit with a circuit board having at least one component arranged on a main surface of the circuit board and a casing element, which incorporates the at least one component, as well as with an esd protection arrangement for the circuit board. According to the disclosure, open areas on the circuit board, which are not covered by the casing element, are covered with a gold layer directly mounted on a copper surface of the circuit board.. ... Zf Friedrichshafen Ag

10/12/17 / #20170292586

Torsional vibrating damping assembly, in particular mass damper unit

A torsional vibration damping arrangement, in particular mass damper subassembly, having a carrier which can be driven in rotation and a damper mass rotatably deflectable with respect to the carrier against the restoring action of a substantially radially extending damper spring. The damper spring is fixedly clamped in the damper mass and is supported or supportable with respect to the carrier for transmitting circumferential force. ... Zf Friedrichshafen Ag

10/05/17 / #20170287609

Electric power control with a dither signal

A method for controlling a current flowing through a consumer comprises the following steps, which are periodically traversed: determining a dither current based on a dither signal and a definite point in time, wherein the dither signal is determined by a frequency, an amplitude and a signal form and actuating a flow control valve to produce the sum of a target current and the determined dither current by the consumer. Furthermore, the method comprises determining an indication to the current flowing through the consumer; compensating the indication by the factor of the dither current; and providing the indication, wherein the determination of the dither current and the determination of the indication are synchronized with each other in a predetermined way.. ... Zf Friedrichshafen Ag

10/05/17 / #20170284475

Torsional vibration damper and start-up element

A torsional vibration damper has an input, an output and an intermediate mass arranged therebetween, a first plurality of spring elements coupled between the input and the intermediate mass that form a first stage, a second plurality of spring elements coupled between the intermediate mass and the output that form a second stage of the torsional vibration damper, at least one damper mass to damp the vibration component of the rotational movement. The first stage of the torsional vibration damper has a progressive first characteristic with at least one transition point. ... Zf Friedrichshafen Ag

10/05/17 / #20170282673

Connecting arrangement for a stabilizer of a vehicle

A connecting arrangement for a stabilizer of a vehicle, with at least one lever that extends transversely to a longitudinal direction. The lever has a bearing eye provided with a non-circular inner circumferential contour. ... Zf Friedrichshafen Ag

09/28/17 / #20170279216

Connection between an electrical cable and a bus bar

The present disclosure provides an arrangement for connecting an electrical cable and a bus bar, where the bus bar includes an insulation device, and wherein the electrical cable includes a cable shoe attached an extruded body. The arrangement may include a connecting device, where the connecting device electrically connects the cable shoe of the electrical cable with the bus bar. ... Zf Friedrichshafen Ag

09/28/17 / #20170276244

Torque converter device and method for controlling a fluid circuit of a torque converter device

A torque converter device and to a method for controlling a liquid circuit of a torque converter device. The torque converter device includes a housing arrangement and a hydrodynamic device arranged in the housing arrangement. ... Zf Friedrichshafen Ag

09/28/17 / #20170276170

Link rod for a motor vehicle

A link rod for a motor vehicle, with a connecting rod (4) designed with an open profile that extends in an axial direction (x), which comprises a back (8) and two opposed sidepieces (9, 10) which are connected to one another by the back (8), extending away from the back so as to enclose an angle (a) of less than 180° between them. Two joints (2, 3) are connected to one another by the connecting rod (4), each joint comprises a joint housing (5) and an inner joint component (6) that is fitted and able to move in the housing and extends outwardly therefrom. ... Zf Friedrichshafen Ag

09/21/17 / #20170273205

Media-tight housing

The present disclosure relates to an assembly comprising a housing and at least one busbar for connecting a printed circuit board disposed in the housing to a power supply present outside the housing, wherein the housing has a penetration, from which the busbar projects, wherein a magnetic core and a gasket accommodating the magnetic core are placed in the housing penetration in a media-tight manner, and the gasket, together with the magnetic core, encompasses the busbar in a form-fitting manner.. . ... Zf Friedrichshafen Ag

09/21/17 / #20170268660

Assembly for blocking and enabling a shifting position of a shifting element

A system for locking and releasing a shifting position of a shifting element that is hydraulically actuatable by an actuating pressure is provided. The shifting element is arranged coaxially with a transmission shaft. ... Zf Friedrichshafen Ag

09/21/17 / #20170268659

Hydraulic control device for an automatic transmission

A hydraulic control device for an automatic transmission includes a shut-off valve arranged between a first pressure adjusting device and a respective shifting element cylinder of a plurality of shifting elements. In the first shifting position of the shut-off valve, the first pressure adjusting device is hydraulically connected to the respective shifting element cylinder through the shut-off valve. ... Zf Friedrichshafen Ag

09/21/17 / #20170268597

Rotary vibration damping arrangement for the drivetrain of a vehicle

A torsional vibration damping arrangement has an input region with a primary mass driven in rotation around an axis of rotation, and an output region. A first and a second parallel torque transmission paths (48), and a coupling arrangement having a planetary gear unit with a planet wheel element for superimposing the torques guided via the torque transmission paths are provided between the input region and the output region. ... Zf Friedrichshafen Ag

09/14/17 / #20170261101

Device reducing drag loss in an automatic transmission

A drag torque reduction device for an automatic transmission includes a hydraulic controller with a parallel connection of a pressure relief valve, a constant aperture and a temperature-dependent, switchable aperture that is positioned upstream of a radiator relative to a flow of fluid to the radiator. The parallel connection is disposed between a first control edge of a converter switching valve and a first line. ... Zf Friedrichshafen Ag

09/14/17 / #20170261091

Device reducing drag loss in an automatic transmission

A drag torque reduction device for an automatic transmission includes a hydraulic controller with a diversion for excess cooling oil into an oil sump that is positioned upstream of a radiator relative to a flow of fluid to the radiator. The diversion includes a temperature-dependent, switchable aperture and a switching valve. ... Zf Friedrichshafen Ag

09/14/17 / #20170261062

End cap for a piston-cylinder unit

An end cap for a piston-cylinder unit with a base which has a through-opening and carries a seal, wherein at least one discharge channel extends radially proceeding from the seal, and wherein the discharge channel is constructed at the end cap on the inner side with respect to an outer cover surface.. . ... Zf Friedrichshafen Ag

09/07/17 / #20170254438

Electromagnetic actuator and valve

The invention relates to an electromagnetic actuator and a valve having such an actuator. The actuator has a first magnetic coil and a second magnetic coil, as well as at least one permanent magnet and an anchor that can be moved axially by the magnetic coils and the permanent magnet between a first and a second position, on which at least one spring device acts in the axial direction. ... Zf Friedrichshafen Ag

09/07/17 / #20170254390

Powershift transmission for working machines

A powershift transmission of a flexible design for a working machine. The powershift transmission has at least six transmission shafts (2, 8, 15, 17, 22, 27, 30) arranged spaced apart from one another. ... Zf Friedrichshafen Ag

08/31/17 / #20170250631

Method and arrangement for monitoring a permanently excited synchronous machine

The present disclosure provides a method for monitoring a rotor position sensor of a psm machine having at least three phases operated by a field oriented control, where the electrical angle of the psm machine may corresponds with a rotor position. A first calculation of the electrical angle of the psm machine may be based on a measured mechanical rotor position and the pole-pair number of the psm machine. ... Zf Friedrichshafen Ag

08/31/17 / #20170248505

System and method for detecting overloading, wear and/or failure of a ball joint

A system and method for detecting wear and/or failure of a ball joint. The system having a ball housing which retains a ball head of the ball joint therein. ... Zf Friedrichshafen Ag

08/31/17 / #20170248249

Electromagnetic valve with spring tongues

The invention relates to an electrically operable valve with an electrical coil and with several spring tongues, which are movable by means of a magnetic field generated by the coil between a first switch position and a second switch position each and with several first valve openings, which are opened when the spring tongues are in the first switch position and which are closed by means of the spring tongues when the spring tongues are in the second switch position.. . ... Zf Friedrichshafen Ag

08/24/17 / #20170240016

Vibration damper and motor vehicle

A vibration damper with a piston, a piston rod fastened to the piston, a working chamber divided by the piston into a first working chamber and second working chamber, and a generator drivable by movement of the piston rod. The damping force of the vibration damper can be influenced by energization of the generator. ... Zf Friedrichshafen Ag

08/24/17 / #20170239735

Drilling milling tool and methods for producing a through-hole

A drilling and milling tool (100) for a metallic workpiece, with a drilling and milling shank (120) having a plurality of circumferentially-cutting cutter tips (151, 152, 153, 154) and a plurality of front-end-cutting cutter tips (131, 132). At least one of the front-end-cutting cutter tips (132) is, at the same time, a circumferentially-cutting cutter tip whose radially outermost cutting point or cutting edge section projects, in the radial direction (r), beyond the circumferentially-cutting cutter tips (151 152, 153, 154). ... Zf Friedrichshafen Ag

08/17/17 / #20170234939

Magnetic field sensor, module with a magnetic field sensor and method to manufacture a module with a magnetic field sensor

Magnetic field sensor having a magnetic field sensor element and at least a band-shaped electrical contact element, in which the at least one contact element has at least one undercut section to fix in spatially form-fitting manner the magnetic field sensor at a support during the at least sectional injection molding process with a plastic material. Magnetic field sensor module, the magnetic field sensor module comprising a support with at least a fixing section for a magnetic field sensor and a plastic injection molding, wherein the magnetic field sensor module has at least such a magnetic field sensor and the magnetic field sensor is spatially fixed in form-fitting manner with its at least one undercut section at the at least one fixing section of the support and is injection molded with plastic material at least in sections, and a method for producing such a magnetic field sensor module, wherein the method comprises the following steps: correctly positioned arrangement of the at least one magnetic field sensor at the support, wherein the at least one magnetic field sensor with its at least one undercut section is arranged at the at least one fixing section, which has not yet been reshaped; reshaping the at least one fixing section to fix in spatially form-fitting manner the at least one magnetic field sensor at the support; injection molding the support at least in sections and/or the magnetic field sensor with plastic material.. ... Zf Friedrichshafen Ag

08/17/17 / #20170234422

Flow output determination method for a hydraulic pump in a transmission hydraulic system

A method for determining a conveying capacity of a hydraulic pump includes opening a blockable flow cross-section in order to connect a pressure side of the hydraulic pump to an area of the hydraulic system through the flow cross-section after operating the hydraulic pump driven at a defined rotational speed. The flow cross-section is configured with the hydraulic pump such that an entire conveying volume flow provided by the hydraulic pump is guided through the flow cross-section when the flow cross-section is open. ... Zf Friedrichshafen Ag

08/10/17 / #20170227087

Assembly concept for a torsional vibration damping arrangement for the powertrain of a vehicle

A torsional vibration damping arrangement, having an input region and an output region. There is provided between the input and output region a first torque transmission path and, a parallel second torque transmission path and a coupling arrangement for superposing the torques. ... Zf Friedrichshafen Ag

08/10/17 / #20170227068

Coupling arrangement for the powertrain of a vehicle

A coupling arrangement for the powertrain of a vehicle with a clutch housing with a feed arrangement for feed medium contained in the clutch housing and with a clutch mechanism, wherein the clutch mechanism has input-side clutch units communicating with an input-side clutch unit carrier, output-side clutch units communicating with an output-side clutch unit carrier, and a pressing device through which an operative connection between the input-side clutch units and the output-side clutch units can be produced or cancelled, and wherein the input-side clutch unit carrier is part of the feed arrangement. The feed arrangement further has a feed device which is associated with the input-side clutch unit carrier and which is connected to the input-side clutch unit carrier and/or to the pressing device so as to be fixed with respect to relative rotation.. ... Zf Friedrichshafen Ag

08/10/17 / #20170227004

Vane pump

A vane cell pump for a transmission of a motor vehicle includes a housing. A rotor defines a plurality of slots. ... Zf Friedrichshafen Ag

08/03/17 / #20170221661

Switching device and method for detecting whether said switching device is being actuated

A switch device is presented. The switch device comprises a magnet supported such that it can be tilted, a transmitter device coupled to the magnet, designed to cause a tilting movement of the magnet in response to a switch actuation of the switch device, and a sensor device, having a first sensor element and a second sensor element for detecting the tilting movement, wherein the first sensor element is designed to acquire a plurality of first magnetic field values of a magnetic field shift of a magnetic field generated by the magnet caused by the tilting movement, and the second sensor element is designed to acquire a plurality of second magnetic field values of a second magnetic field shift of the magnetic field generated by the magnetic caused by the tilting movement.. ... Zf Friedrichshafen Ag

08/03/17 / #20170219109

Adjustable damping valve device

An adjustable damping valve device for a vibration damper, includes a main stage valve which is controlled by a pre-stage valve which is functionally connected in series with the emergency operation valve. A pressure relief valve having the constructional form of a seat valve is arranged inside the emergency operation valve and is functionally connected in parallel with the emergency operation valve. ... Zf Friedrichshafen Ag

08/03/17 / #20170219062

Motor vehicle transmission

A vehicle transmission having a housing and a main transmission which includes input and output shafts and four planetary gearsets. Each of the gearsets has sun and ring gears, a carrier which supports a planetary gearwheel. ... Zf Friedrichshafen Ag

08/03/17 / #20170219047

Torsion damping arrangement for the powertrain in a vehicle

A torsional vibration damping arrangement includes: an input region, an output region, and a coupling arrangement communicating with the output region. A phase shifter arrangement communicates with the input region. ... Zf Friedrichshafen Ag

08/03/17 / #20170219042

Damping valve comprising a pressure relief valve

An adjustable damping valve (12) includes a pressure space (22c) for controlling the damping valve (12), which pressure space (22c) is arranged inside the damping valve (12) and is connected to a further space (20) via at least one choke orifice (30) for the flow of damping medium, and the pressure space (22c) is operatively connected to the further space (20) via a pressure relief valve (32).. . ... Zf Friedrichshafen Ag

08/03/17 / #20170218989

Assembly holder and assembly

A module mount having at least one module that can be mounted on the module mount, wherein the module can be mounted on the module mount via at least one caulking element, such that the respective caulking element, which is composed of a thermoplastic, extends through a hole in a section of the respective module that can be mounted on the module mount made of a thermoplastic or thermoset, and is hot-caulked at an end projecting out of the hole, wherein at least one projection is formed on the section of the respective module that can be mounted on the module mount in the region of the respective hole of the section of the respective module that can be mounted on the module mount made of the thermoplastic or thermoset, which projection is engaged in a press fit with the hot-caulked end of the respective caulking element.. . ... Zf Friedrichshafen Ag

07/27/17 / #20170211695

Power split transmission and method for operating such power split transmission

A power-split transmission which is designed to be operated with either first or second deceleration logics. The second deceleration logic has a higher deceleration dynamic than the first deceleration logic, and is designed to disengage an engaged range clutch immediately so as to reduce the transmission ratio by way of a hydrostatic unit with a maximum dynamic. ... Zf Friedrichshafen Ag

07/27/17 / #20170211694

Transmission device and method for operating the same

A power-split transmission device for a vehicle, which connects a drive engine to a drive output, having a hydrostatic unit for continuous adjustment of the transmission ratio at a transmission unit, and two range clutches that alternately operate for respectively associated driving ranges with different transmission ratios. A control unit, during regular vehicle deceleration, implements the driving range change from a first range, with higher transmission ratios, to a second range, with lower transmission ratios, by switching from the first to the second range clutch in accordance with a synchronous point dependent deceleration control logic. ... Zf Friedrichshafen Ag

07/27/17 / #20170210387

Method for operating a drive train

A rotational speed-regulated internal combustion engine in a working machine, for example a wheel loader, shortly before the engaging a bridging clutch of a hydrodynamic torque converter, is switched over in such manner that the internal combustion engine operates under torque regulation when the bridging clutch of the hydrodynamic torque converter is engaged.. . ... Zf Friedrichshafen Ag

07/27/17 / #20170210375

Hybrid module and drive train having such a module

A hybrid module (2) with a vibration reducing system (4) which is coupled between an output side (8) and an input side (6) of the hybrid module (2). The vibration reducing system (4) is configured to reduce an injected torsional irregularity, wherein the vibration reducing system (4) has a preload that is greater than an assembly-related preload. ... Zf Friedrichshafen Ag

07/27/17 / #20170210188

Ball joint for a chassis

A ball joint having a ball pin and a housing. The ball pin together with the ball is accommodated in the housing to move in a rotational and pivotal manner. ... Zf Friedrichshafen Ag

07/27/17 / #20170210187

Control arm and method for producing same

A method of producing a control arm for a motor vehicle, in particular a multi-point control arm, preferably a transverse control arm, which is substantially formed by a fiber-plastic composite structure. The method includes the steps: creating of a preform structure with load-adapted fiber orientation, introducing the preform structure into a forming tool, consolidating the preform structure in the tool by application of pressure and/or temperature, and removing and further processing of the control arm.. ... Zf Friedrichshafen Ag

07/20/17 / #20170207675

Coil for an electric machine

A coil for a stator of an electric machine, comprising a winding body with a winding area formed by a winding carrier and two legs that limit the winding area connected to the winding carrier. At least one leg has a first wire guide area, a coil winding arranged at the winding body and which has a winding wire with a winding start area and a winding end area and with coil ends extending, respectively, from the winding start area and the winding end area. ... Zf Friedrichshafen Ag

07/20/17 / #20170204942

Multi-speed transmission for rail vehicles

A multi-speed transmission (9) for a rail vehicle. The multi-speed transmission (9) has at least one transmission input (an), at least one transmission output (ab), at least one planetary gearset (pr1, pr2), at least one shifting element (se1, se2) and a housing (g). ... Zf Friedrichshafen Ag

07/20/17 / #20170204916

Starting element, gearbox and drive train with the start element

A starting element with a friction clutch and a piston configured to actuate the friction clutch. The starting element includes a piston space separated from a residual space of the starting element at least partially by the piston, a first connection constructed such that the piston is acted upon by a hydraulic medium proceeding from one side of the residual space, and a second connection fluidically connected to the piston space. ... Zf Friedrichshafen Ag

07/20/17 / #20170203761

Operating method for a vehicle drive train of a working machine including a drive motor, a transmission and an output

A method for the operation of a vehicle drive-train of a working machine having a drive motor, a transmission whose transmission ratio can be varied continuously, and a drive output. A rotational speed (nmot) of the drive motor can be varied by the driver, by the driver's actuation of a first control element (50), within a rotational speed range (53) delimited by an upper characteristic line (nmoto) and a lower characteristic line (nmotu). ... Zf Friedrichshafen Ag

07/13/17 / #20170198811

Method for operating a power split transmission

During a shift from a first driving range to a second driving range in a continuously variable power-split transmission having a continuously variable branch and a mechanical branch, in which during the range shift, the synchronous rotation speed is kept constant, the range shift is discontinued if a predefined threshold of at least one driving requirement is exceeded.. . ... Zf Friedrichshafen Ag

07/13/17 / #20170198805

Gear selection unit for an automatic transmission for a vehicle, and method for operating a gear selection unit

The present disclosure provides a gear selection unit for an automatic transmission. The gear selection unit may include a mount having a gate, where the gate has an automatic channel oriented in a longitudinal direction and a tapping channel disposed adjacent to the automatic channel, and where the automatic channel and the tapping channel are connected to one another via a connecting channel. ... Zf Friedrichshafen Ag

07/13/17 / #20170198765

Method for reversing a direction of travel of a working machine comprising a power split transmission

A reversing method for reversing a travel direction of a working machine with a power-split transmission in which control signals are emitted by a control unit such that a reversing clutch, for the current travel direction, is disengaged and a reversing clutch for the new travel direction is engaged. The reversing clutches are controlled by control variables. ... Zf Friedrichshafen Ag

07/06/17 / #20170190244

Module for a motor vehicle having an electric machine and a clutch actuating device

An assembly for a motor vehicle has an electric machine and a clutch actuating device. The electric machine has a machine housing, a rotor and a stator. ... Zf Friedrichshafen Ag

06/29/17 / #20170184191

Transmission

A transmission for a motor vehicle includes an electric motor. A rotor shaft is connected in a torque-proof manner to a rotor of the electric motor. ... Zf Friedrichshafen Ag

06/22/17 / #20170179863

Arrangement and method for monitoring a psm-machine

A method is provided for monitoring a psm machine having at least, or exactly, three phases, which are operated by means of a field oriented control, comprising the following steps: detection of whether one or more current sensors disposed on a phase of the psm machine has malfunctioned, when a malfunction of current sensors has been detected, such that only one of the current sensors remains functional, calculation of the voltage indicator from the voltage amplitudes and voltage phases of the input voltage of the psm machine in a d, q-coordinate system by means of two different methods, wherein a first calculation of the input voltage occurs in the first method, based on a phase current measured by a functioning current sensor, and the target currents, as well as the electrical angle of the machine, and in the second method, a second calculation of the input voltage occurs, based on target values of the reference voltage amplitude and the reference voltage phase, and determination of the voltage amplitudes and voltage phases of the input voltage of the psm machine through comparison of the values of the respective voltage amplitudes and voltage phases determined from the input voltage in the first and second methods with one another. Furthermore, a corresponding assembly is provided.. ... Zf Friedrichshafen Ag

06/22/17 / #20170175879

Gear selector shift lever device, gear selector shift lever arrangement for a vehicle, and method for securing a gear selector shift lever device

A gear selection shift lever device for a vehicle is presented, which comprises a housing and an attachment device connected to the housing, wherein the housing has a cover surface, on which a shift lever can be or is disposed, and wherein the attachment device connected to the housing has a shaft and an eccentric disk coupled to the shaft, wherein a center of the eccentric disk lies outside the shaft axis of the shaft, wherein the attachment device is designed to connect the gear selection shift lever device to a mount for the gear selection shift lever device that can be or is attached to the vehicle, when the eccentric disk is moved about the shaft axis.. . ... Zf Friedrichshafen Ag

06/22/17 / #20170175843

Piston and cylinder unit with an add-on part

A piston-cylinder unit having a cylinder with an add-on part which has a fastening portion that contacts a contact surface of the cylinder. A positive engagement connection fixing the add-on part to the cylinder is provided between the add-on part and the cylinder. ... Zf Friedrichshafen Ag

06/22/17 / #20170175840

Cylinder, in particular for a tuned mass damper, having a sleeve-shaped add-on piece

A cylinder (1), particularly for a vibration damper, includes a base (3) and a sleeve-shaped add-on part (5) which at least partially surrounds the cylinder (1) and which has at an end of the cylinder a radially inwardly directed edge profile. The edge profile (11) contacts an end face of the cylinder (1) in a noncontacting manner with respect to the base.. ... Zf Friedrichshafen Ag

06/22/17 / #20170174217

Method of operating a power path with continuously power-split transmission and with secondarily coupled power split

A method for operating a vehicle drive-train having a continuously power-branched transmission with secondary coupling. In the open operating condition of reversing clutches of a reversing gear unit, torque applied in the area of a drive output can be supported by a range group in the area of a variator. ... Zf Friedrichshafen Ag

06/22/17 / #20170174208

Method and control unit to control a drivetrain

A method for operating a drive train of a motor vehicle includes closing a frictional-locking shift element that serves as a starting element of a transmission in a slipping manner such that slip at the frictional-locking shift element is reduced by a defined pressure control of the frictional-locking shift element, determining a differential rotational speed at the frictional-locking shift element or a variable dependent on the differential rotational speed while the frictional-locking shift element is closing, and, when the differential rotational speed or the variable dependent on the differential rotational speed is less than a first limit value or reaches the first limit value, changing a rotational speed of the drive unit in such a manner that the differential rotational speed or the variable dependent on the differential rotational speed becomes less than a second limit value or reaches the second limit value within a defined time period.. . ... Zf Friedrichshafen Ag

06/15/17 / #20170171996

Electronic transmission controller, and method for producing same

The present disclosure relates to an electronic transmission controller, with a housing, a printed circuit board assembly, and at least one electronic module mounted on the printed circuit board assembly. The printed circuit board assembly may include a first region extending inside the housing, the first region being sealed from an external fluid. ... Zf Friedrichshafen Ag

06/15/17 / #20170166303

Rotor head with integrated electronics for a helicopter

The discovery concerns a rotor hub cover for a helicopter, whereby the rotor hub cover has been constructed as a rotational body with a dome-shaped cover and the rotor hub cover has performance and control electronic components, characterized by the arrangement of the performance electronic components and the control electronic components on a surface of the internal side or the dome-shaped cover.. . ... Zf Friedrichshafen Ag

06/08/17 / #20170163185

Method for sensorless commutation of a brushless direct current motor

A method for sensorless commutation of a bldc motor is presented, wherein the following steps are executed.in step 1, the voltage of a currentless phase is sampled in predetermined time intervals. In step 2, the voltage of the zero crossing, and the associated rotational rate, is determined on the basis of the time difference between two sampling points, and the point in time of the zero crossing is supplied to a commutation timer k, when a zero crossing has been detected between two sampling points. ... Zf Friedrichshafen Ag

06/08/17 / #20170159808

Device for adjusting a movement of an operating element for an automatic transmission of a vehicle, method for producing same, and shifting device for shifting an automatic transmission of a vehicle

A device for the adjustment of a movement of an operating element for an automatic transmission of a vehicle. The device comprises an engaging contour for defining of at least one shift position of the operating element along a motion path of the operating element and a contact surface. ... Zf Friedrichshafen Ag

06/08/17 / #20170159799

Actuating apparatus for selecting gears for a gear change transmission and method for blocking an actuating apparatus

An actuating device for selecting gears for a change gear transmission, in particular for an automatic transmission with shift-by-wire actuation, wherein a selector lever of the actuating device is movable in a main shift track and a touch-shift track and between the main shift track and the touch-shift track in a changing track, wherein the actuating device comprises a latch mechanism acting on the selector lever, characterized by a locking device comprising a locking gate, an actuator and a locking bolt guided through the actuator, wherein the locking gate comprises at least one locking recess, wherein at one position of the selector lever within the main shift track the locking bolt is movable by the actuator and the locking bolt is configured to engage in the locking recess, wherein the locking device comprises a spring, wherein a holding force caused by the spring is greater than a restoring force of the latch mechanism of the actuating device acting from a position of the selector lever in the touch-shift track to a position in the main shift track, and wherein the spring is configured to act against a movement of the selector lever from the touch-shift track to the main shift track, when the selector lever is positioned in the touch-shift track.. . ... Zf Friedrichshafen Ag

06/08/17 / #20170159754

Transmission for the powertrain of a rail vehicle

A transmission for the power-train of a rail vehicle, in which the transmission (3) includes an input shaft (4), an intermediate shaft (5) and a drive output shaft (6). The input shaft (4) can be connected so as to be driven by a drive motor (2), and the drive output shaft (6) forms a wheelset shaft of the rail vehicle. ... Zf Friedrichshafen Ag

06/08/17 / #20170158317

System for reducing vibrations or stresses in a rotor blade system

In one aspect, the present disclosure provides a system for reducing vibrations or stresses in a rotor blade system. The system may include at least three rotor blades configured to be rotated about a main rotor axis, where each of the three rotor blades may be adjusted by at least one electrically-adjustable control rod of a plurality of control rods. ... Zf Friedrichshafen Ag

06/01/17 / #20170152938

Apparatus for optoelectronically detecting a selector lever position, selector lever apparatus, method for producing an apparatus and method for optoelectronically detecting a selector lever position

The present disclosure relates to a device for the optoelectronic detection of different positions of a selection lever for selecting different gear steps of a gearshift transmission, in particular a motor vehicle transmission. The detection device can be coupled to the selection lever, and comprises at least one light source for emitting light, and one light sensor for detecting the emitted light. ... Zf Friedrichshafen Ag

06/01/17 / #20170152916

Transmission for a motor vehicle

A dual clutch transmission for a motor vehicle including two sub-transmissions, each having at least one input shaft. An output shaft outputs drive from both sub-transmissions. ... Zf Friedrichshafen Ag

06/01/17 / #20170152910

Adjustable damping valve device with a damping valve

An adjustable damping valve device with a damping valve has an elastic element, applies an axial relative force between two elements which are constructed so as to be axially movable relative to the valve housing, or the elastic element applies a relative force between an element of the damping valve, which element is constructed so as to be axially movable relative to the valve housing, and the valve housing, or the elastic element applies a relative force between an element of the damping valve, which element is constructed so as to be axially movable relative to the valve housing, and an element which is constructed so as not to be displaceable relative to the valve housing, so that one of the axially movable elements releases a flow passage for the flow of damping medium through the damping valve at least in a neutral state of the damping valve device.. . ... Zf Friedrichshafen Ag

06/01/17 / #20170151953

Method for coupling a power take-off

A method, a control unit and a computer program product for coupling an auxiliary power take-off of a motor vehicle transmission, in which, after a command to couple the auxiliary power take-off, conditions required for the coupling of the auxiliary power take-off are checked and, if the conditions are satisfied, an actuator system for coupling the auxiliary power take-off is activated. If, after the command to couple the auxiliary power take-off, the conditions for coupling the auxiliary power take-off are not fulfilled, then a control unit acts upon drive-train components in order to produce the conditions required for the coupling of the auxiliary power take-off.. ... Zf Friedrichshafen Ag

05/18/17 / #20170136839

Device and method for detecting a pivot angle between a vehicle and a trailer device

The disclosure relates to a pivot angle detection device and a method for detecting a pivot angle between a vehicle and a trailer coupling device that is coupled to the vehicle. A transmitter is hereby provided, which is designed for producing an electromagnetic field, as well as a receiver which is designed to detect a field strength of the electromagnetic field, whereby the transmitter and receiver are arranged towards each other on the vehicle and trailer coupling device in such a way that a change of the pivot angle produces a dependent change in the field strength that is detected by the receiver. ... Zf Friedrichshafen Ag

05/11/17 / #20170133906

Electromechanical actuator

An electromechanical actuator having an electric motor which comprises a rotor shaft (5) and a motor housing (2). A bearing plate (6) is supported inside the motor housing (2) for holding the rotor shaft (5). ... Zf Friedrichshafen Ag

05/11/17 / #20170131713

Position-dependent representation of vehicle environment data on a mobile unit

The present disclosure, in one aspect, provides a method for monitoring a vehicle environment. The method may include determining environmental data of a vehicle with an environmental sensor system, transmitting the environmental data to a mobile unit, determining a local position of the mobile unit with respect to the vehicle, and selecting a subset of the environmental data based on the local position of the mobile unit and depicting the subset of the environmental data on the mobile unit.. ... Zf Friedrichshafen Ag

05/11/17 / #20170130819

Selector lever reset device for a vehicle gearbox, and method and device for operating such a selector lever reset device

The present disclosure provides a selector lever resetting device for a vehicle transmission. The selector lever resetting device may include a selector lever configured to select a gear position of the vehicle transmission and a lever guide device, the lever guide device having a first sliding element and a locking slide. ... Zf Friedrichshafen Ag

05/11/17 / #20170129040

Method for producing a chassis component

A method of producing a chassis component which includes a housing that is connected to a structural component by a weld. A receiving opening is formed in the structural component and the housing is pushed into the receiving opening, where a surface on the housing and a surface on the structural component are in contact with one another. ... Zf Friedrichshafen Ag

05/04/17 / #20170122419

Hybrid drive having an automated conventional gearbox

The invention relates to a hybrid drive having an automated conventional gearbox, for example for a motor vehicle, having an internal combustion engine (vm) which has a drive connection to at least a first transmission input shaft (w1), having an electric drive which has at least one electric machine (em1) which has a drive connection to a second transmission input shaft (w3; w3′), having at least one layshaft (w4), having freely moving wheels and fixed wheels (z11-z17, z21-z29, zr3) which are arranged in a plurality of wheel set planes (z1-z7), having a plurality of gear shift devices (s1-s4), and having a transmission output shaft (w2). In order to permit a high degree of variability in terms of a wheel set concept as well as the distribution and the number of electrical and internal-combustion-engine gearspeeds, to keep the expenditure on design and the costs low and to ensure efficient and comfortable operation, there is provision that the two transmission input shafts (w1, w3; w1, w3′) are arranged coaxially with respect to one another, and in that in one of its shifted positions a gear shift device (s1) connects the two transmission input shafts (w1, w3; w1, w3′) to one another effectively in terms of drive, and in another shifted position shifts a gearspeed.. ... Zf Friedrichshafen Ag

05/04/17 / #20170120921

Method for control of a gear step change

A motor vehicle having a braking device and drive engine which can be used independently of one another for decelerating the vehicle. A method of controlling the vehicle during a thrust operation includes steps of detecting a requirement to change a currently engaged first gear in a transmission that transfers the braking force from the engine; determining a first deceleration brought about by the engine in the first gear; determining a second deceleration brought about by the engine in a second gear to be engaged; and changing the gear by disengaging a clutch that couples the engine to the transmission, the first gear is disengaged, the second gear is engaged, and the clutch is again engaged. ... Zf Friedrichshafen Ag

05/04/17 / #20170120919

Method for actuating a vehicle powertrain

A method for operating a vehicle drive train includes operating the vehicle drive train with a drive unit switched on, with the drive unit connected to an output by a transmission, and with a positive-locking shifting element open. In response to a coasting operating state request for the vehicle drive train and a rotational speed of a transmission output being greater than a threshold, the drive unit is switched off and power flow between the drive unit and the output is interrupted by opening at least one of a plurality of frictional-locking shifting elements. ... Zf Friedrichshafen Ag

05/04/17 / #20170120707

Spring bracket arm

A spring carrier of a motor vehicle axle, particularly of a portal axle, with a longitudinal portion (1) and a flange portion (2) which adjoins the one end of the longitudinal portion (1) and which has a flange (8). The longitudinal portion (1) includes at least one fastening point for fastening to a shock absorber and/or to a suspension. ... Zf Friedrichshafen Ag

04/27/17 / #20170118847

Circuit board and arrangement with a circuit board

The present embodiments provide a circuit board. The circuit board may comprise a first main surface, a first soldering region located on the first main surface, the first soldering region including a plurality of first capture pads for connecting the circuit board with connection pins of an integrated circuit carrier, and a second soldering region for connecting the circuit board with a heat conducting surface of the integrated circuit carrier. ... Zf Friedrichshafen Ag

04/20/17 / #20170108864

Vehicle system and method for enabling a device for autonomous driving

A vehicle system of a vehicle for a vehicle user having a camera, an evaluation unit which has a memory and is coupled to the camera, a communication device that is coupled to the evaluation unit, and a self-drive unit which is coupled to the evaluation unit for autonomously driving the vehicle. The camera views the face of the vehicle user and relays collected data to the evaluation unit. ... Zf Friedrichshafen Ag

04/20/17 / #20170107739

Device for an actuation handle, actuation handle, and method for wireless transmission of a signal generated by autonomous energy

The present disclosure relates to a device for an actuation handle, having an actuation bolt, which has at least one section along its longitudinal axis (a) having at least one outer edge on its circumference. The device comprises a housing having a first receiving section for receiving an energy converter for supplying electrical energy to a radio transmitter by converting mechanical energy into electrical energy, and an aperture for the actuation bolt, wherein the aperture has a second receiving section for rotatably accommodating the section of the actuation bolt having at least one outer edge. ... Zf Friedrichshafen Ag

04/13/17 / #20170103640

Portable device

A portable device for increasing road traffic safety, detecting emergencies and emitting an alarm call for a person. The portable device includes a communication device, a position-determining system, an evaluation unit and a vibration generator. ... Zf Friedrichshafen Ag

04/06/17 / #20170097066

Powershift transmission for construction machinery

A powershift transmission, particularly for a construction machine such as backhoes or telehandlers, includes a mechanical power path and a hydrodynamic power path. The first, second and third gears can be engaged by way of the hydrodynamic torque converter (1) while the fourth, fifth and sixth gears can be engaged without the hydrodynamic torque converter (1). ... Zf Friedrichshafen Ag

03/30/17 / #20170089430

Transmission for a vehicle

A transmission for a motor vehicle includes a first planetary gear set with at least three central gears which are formed by a ring gear and two sun gears or by two ring gears and one sun gear. A second planetary gear set includes two central gears which are formed by one ring gear and one sun gear. ... Zf Friedrichshafen Ag

03/23/17 / #20170082135

Device for securing a tension element against unintentional release

The invention relates to a device (14) for securing a clamping element against unintentional release, with a disk-shaped structure (15) that is penetrated in an axial manner by a bore hole (16). Thereby, the structure (15) is provided for an inner diameter with a driving profile (17) defined by the bore hole (16), which, in the placement of the structure (15), engages with the bore hole (16) on a radially inner component in a profile provided on the part of such component and thereby establishes a torque-proof coupling of the structure (15) with this component. ... Zf Friedrichshafen Ag

03/23/17 / #20170080943

Dual-clutch transmission parking brake disengaging method of a vehicle

A method for disengaging a parking lock of a dual-clutch transmission of a motor vehicle with at least one drive unit is provided. The method includes, upon detection of an absolute value of a road inclination along a longitudinal axis of the motor vehicle exceeding a predetermined threshold and upon actuation of a selector lever for disengaging the parking lock prior to disengagement of the parking lock, issuing a torque request to the drive unit and closing a power-shifting clutch of the dual-clutch transmission with an engaged gear in a sub-transmission to which the power-shifting clutch is allocated. ... Zf Friedrichshafen Ag

03/23/17 / #20170080771

Self-pumping hydropneumatic suspension strut

A self-pumping hydropneumatic suspension strut includes a high pressure area and a low pressure area, wherein pressurized medium is exchanged between the high pressure area and the low pressure area via a passive pump device. At least two separate channel systems with connection orifices which determine level position and are controlled depending on the position of a piston rod are provided between the high pressure area and the low pressure area. ... Zf Friedrichshafen Ag

03/23/17 / #20170080753

Axle assembly for drive device of a motor vehicle

An axle assembly for a drive device for the road wheels of a vehicle includes: a stationary housing having a housing interior at least partially filled with a lubricating liquid; axle housings connected to the stationary housing and configured to permit axles of the vehicle to pass towards the road wheels; a venting bore in one of the axle housings configured to allow pressurized air to escape from the stationary housing; and at least one rib sized and positioned in the housing interior of the stationary housing so as to prevent migration of the lubricating liquid out of the venting bore.. . ... Zf Friedrichshafen Ag

03/16/17 / #20170076888

Switching device for a radio pushbutton, radio pushbutton, and method for generating a switching signal of a radio pushbutton

Provision is made for a switching device for a wireless switch. The switching device comprises actuating means for receiving a mechanical energy, which can be introduced during a switching operation into the switching device. ... Zf Friedrichshafen Ag

03/16/17 / #20170074345

Vibration damper and motor vehicle

A vibration damper includes at least one tube element and a piston which is displaceable in axial direction in the tube element, a piston rod connected to the piston, and a damping force generating device, wherein the piston divides the working space in the interior of the tube element into a first working space on the piston rod side and a second working space remote of the piston rod, and wherein a hydraulic transmission element is arranged in or at the piston, and the transmission behavior of the hydraulic transmission element depends on the movement of the piston or of the piston rod, wherein the hydraulic transmission element encloses a compensation volume. The size of the compensation volume of the transmission element depends on the annular area of the piston which is the difference of the cross-sectional area of the piston and the cross-sectional area of the piston rod.. ... Zf Friedrichshafen Ag

03/16/17 / #20170074343

Extension for a shock absorber

Extension for a cylinder of a vibration damper comprising a base and a tube portion adjoining the latter. The base and the tube portion are formed in one piece. ... Zf Friedrichshafen Ag

03/16/17 / #20170074333

Method for actuating a hydraulic medium supply system of an automatic transmission

A method for controlling a hydraulic fluid supply system of an automatic transmission of a motor vehicle includes supplying the hydraulic fluid supply system with hydraulic fluid from at least one of a hydraulic pump controlled on an engine side and a hydraulic pump controlled on a gear set side. The method also includes controlling a retaining valve of the hydraulic fluid supply system as a function of detected motor vehicle parameters in order to set an adjusted power distribution with the hydraulic pump controlled on the engine side and the hydraulic pump controlled on the gear set side.. ... Zf Friedrichshafen Ag

03/16/17 / #20170074332

Method for controlling a hydraulic-medium supply system of an automatic transmission

A method for controlling a hydraulic fluid supply system of an automatic transmission of a motor vehicle includes supplying the hydraulic fluid supply system with hydraulic fluid from at least one of a hydraulic pump controlled on an engine side and a hydraulic pump controlled on a gear set side. The method also includes controlling a cooling valve of the hydraulic fluid supply system as a function of detected motor vehicle parameters in order to set an adjusted power distribution with the hydraulic pump controlled on the engine side and the hydraulic pump controlled on the gear set side.. ... Zf Friedrichshafen Ag

03/02/17 / #20170058988

Damping valve device for a vibration damper

A damping valve device (27), includes a damping valve housing (31) with a tube part (33) and an outer top housing part (35), wherein an intermediate housing wall (39) which is fixed with respect to the tube part (33) spatially separates a coil assembly (37) from a valve region (73), and the outer top housing part (35) forms a back iron body for the coil assembly (37), wherein an inner sleeve (69) together with a base (71) closes the valve region (73), wherein the outer top housing part (35) is a component part which is separate from the intermediate housing wall (39), and the inner sleeve (69) is connected to the intermediate housing wall (39) in a pressure-tight manner independent from the outer housing part (35), and wherein a protective cap (93) which is separate from the outer top housing part (35) covers the outer top housing part (35).. . ... Zf Friedrichshafen Ag

03/02/17 / #20170057591

Vibration damper with level control

A suspension system includes a spring support for a vehicle support spring. A spring collar supporting the vehicle support spring is selectively adjustable with respect to position by a pressurized-medium supply with the aim of adjusting the level of a vehicle body. ... Zf Friedrichshafen Ag

03/02/17 / #20170057335

Hybrid drive arrangement of a motor vehicle

A hybrid drive arrangement of a motor vehicle, which has a main transmission having an input shaft and housing. An electric machine, that can operate either as a motor and a generator, has a stator and rotor which, on the input side, is connected to the main transmission. ... Zf Friedrichshafen Ag

02/16/17 / #20170045139

Transmission device having a hydraulic system

A hydraulic system (1) of a transmission device (2) is connected to a hydraulic pump (43) that can be driven by the transmission input shaft and to an additional hydraulic pump (44) that can be driven by the transmission output shaft, and forwards hydraulic fluid volumes conveyed by the hydraulic pumps (43, 44) to transmission components. Transmission components can be subjected to hydraulic fluid by means of a primary pressure circuit (46) and by means of a secondary pressure circuit (54). ... Zf Friedrichshafen Ag

02/16/17 / #20170045098

Hydraulic system of a transmission with a plurality of pressure regulating valves

A hydraulic system (1) of a transmission (2) with a multiple number of pressure control valves (62 to 29) is described, in the area of which an applied pressure (p_sys) can be adjusted to a pressure level to be set downstream as a function of a total force component acting on a valve slide depending on the operating state. The total force component is adjusted as a function of a pilot force component that can be applied to the valve slide, an actuating force component and a control force component that exists as a function of the pressure level prevailing downstream. ... Zf Friedrichshafen Ag

02/16/17 / #20170043657

Drive module for a drive train of a hybrid vehicle

Drive module (14) for a powertrain (10) of a hybrid vehicle, comprising a housing (20), a friction clutch (18) with a pressure plate (62) which is axially displaceable by means of an actuating arrangement (60), a clutch plate (66) and with a clutch disk arrangement (74) positioned therebetween, a hub (84), wherein this hub (84) is fixedly connected to the clutch disk arrangement (74), and an electric machine (16) which has a rotor (22) with a rotor carrier (24) and a stator (32) which is fixed at a stator carrier (34). The axial arrangement or alignment of the clutch disk arrangement (74) relative to the pressure plate (62) and clutch plate (66) is determined by an adjusting arrangement (92), wherein the adjusting arrangement (92) is functionally arranged between the hub (84) and a supporting element (90) which is axially fixed to the housing (20) of the drive module (14). ... Zf Friedrichshafen Ag

02/09/17 / #20170042031

Method for protecting an electronic circuit carrier against environmental influences and circuit module

. . The present disclosure provides a method for protecting an electronic interconnect device from environmental effects. The electronic interconnect device may be connected to at least one electronic component, wherein the electronic interconnect device and the at least one electronic component are at least partially covered with an encapsulating material in a material-bonded manner. ... Zf Friedrichshafen Ag

02/09/17 / #20170040863

Housing for a driving unit for a vehicle, driving unit for a vehicle and method for producing a driving unit for a vehicle

A housing for a drive unit is presented for a vehicle. Here the housing features a first housing segment for accommodating an electric machine and a second housing segment for accommodating a power electronics unit for the electric machine. ... Zf Friedrichshafen Ag

02/09/17 / #20170040852

Modular unit comprising a laminate stack for an electric machine, method for producing such a modular unit, and electric machine

A component unit for an electric machine includes an annular lamination stack formed of a plurality of axially stacked laminations. The lamination stack is secured by an inner or outer cylindrical fastening portion to a cylindrical receiving portion of a carrier element. ... Zf Friedrichshafen Ag

02/09/17 / #20170037958

Method for parameterizing gearshifts and for carrying out gearshifts

A method of parameterization of traction force interrupted shifts in a transmission of a commercial vehicle having a frame, a cab supported by the frame, and a trailer coupled to the frame. The method includes a mathematical model which considers movement equations and geometrical parameters of the frame, the cab, and the trailer. ... Zf Friedrichshafen Ag

02/09/17 / #20170037955

Torque transmission arrangement, and drive module comprising same

A torque transmission arrangement, particularly for an arrangement with an electric machine in a drive module of a hybrid vehicle or electric vehicle, for transmitting a torque from an output shaft, particularly a motor output shaft, to a drive shaft, particularly a transmission input shaft. The drive shaft further has at least one fluid guide channel in which a fluid can be guided in direction of the output shaft. ... Zf Friedrichshafen Ag

02/02/17 / #20170033621

Stator for an electric machine and electric machine

A stator of an electric machine for a hybrid vehicle or electric vehicle includes: a substantially cylinder-jacket-shaped, axially extending stator carrier. The stator carrier is configured to carry a lamination stack having a plurality of stator teeth substantially annularly arranged and has a radially inwardly extending shoulder edge configured so as to axially support the lamination stack. ... Zf Friedrichshafen Ag

02/02/17 / #20170032674

Parking assistant

A method for finding a parking space for a first motor vehicle includes determining a required minimum length of the parking space on which the first motor vehicle is parkable, scanning a length of the adjacent parking space through the second motor vehicle, and driving the first motor vehicle to the adjacent parking space bounded by the second motor vehicle when the length of the adjacent parking space corresponds to at least the minimum length. Related transmission devices and control systems are also provided.. ... Zf Friedrichshafen Ag

02/02/17 / #20170030460

Optimization of switching operations

A method of optimizing shifting of a shifting element which fixes a shaft to another component of the drive-train. Three shifting processes are influenced by respective characteristic forms of a control parameter. ... Zf Friedrichshafen Ag

01/26/17 / #20170023128

Fastening device, selector level housing, force transmission element, switching device and method for fastening a switching device

The present invention relates to an attachment mechanism, a gearshift lever housing, a force transmitting element, a shift device, and a method for attaching a shift device, which reduce a system noise that is transmitted from an engine compartment into a motor vehicle interior space. The attachment mechanism comprises an aperture for receiving the gearshift lever device, a bearing surface section at least partially encompassing the aperture, for bearing on a bearing element, a sealant receiver disposed in the bearing surface section, and a mount for supporting a section of a force transmitting device, by means of which the gearshift lever device can be connected to a motor vehicle transmission device in a shift-effecting manner, wherein the mount is disposed on a side of the bearing surface section facing away from the sealant receiver. ... Zf Friedrichshafen Ag

01/26/17 / #20170023096

Torsional vibration damper comprising a damping system, a damping device and a ground device

A torsional vibration damper (70) with a damping device which has an input (67) and an output (72) which is operatively connected to a driven side (73). The output is connected to a mass damper system (1) and also to a mass arrangement (100). ... Zf Friedrichshafen Ag

01/26/17 / #20170023087

Adjustable damping valve device

An adjustable damping valve device includes a pressure-dependent auxiliary damping valve with an auxiliary damping valve body having at least one through-channel whose outlet side is at least partially covered by at least one valve disk. The at least one valve disk is centered at its outer diameter with respect to the auxiliary damping valve body, and the auxiliary damping valve body is constructed integral with a centering collar at which the at least one valve disk is guided.. ... Zf Friedrichshafen Ag

01/19/17 / #20170016531

Method for starting a mobile vehicle

A method of starting or holding a mobile vehicle and, in particular, a working machine. The method determines whether the vehicle is rolling backward on an inclined surface and, as a function of that knowledge, the rotational speed of the drive engine is increased, or a downshift by one gear is carried out in the transmission.. ... Zf Friedrichshafen Ag

01/19/17 / #20170016529

Device and method for adjusting a movement of an operating element for a vehicle automatic transmission and shifting device for shifting a vehicle automatic transmission

The disclosure provides a device for regulating a movement of an operating element for an automatic transmission of a vehicle. The device comprises a rotatable shaft and a bearing element for bearing the operating element. ... Zf Friedrichshafen Ag

01/19/17 / #20170015294

Method for transmitting power of an inch clutch

A method of transmitting power of an inching clutch of a working machine, the power transmitted by the inching clutch is determined and the transmitted power exceeds a predefined inching clutch power, first the rotational speed of the drive engine is reduced and then the torque, that can be transmitted by the inching clutch, is reduced.. . ... Zf Friedrichshafen Ag

01/12/17 / #20170013734

Protective housing for flexible fixation of components and circuit board with protective housing

The protective housing can cover at least one component on the circuit board; the interior of the cover has several protrusions that are built, so that at least one part is displaced by raising the protective housing on at least one component, so that it is in contact with the exterior contour of the component and fastens it. Moreover, a circuit board is provided with at least one protective housing.. ... Zf Friedrichshafen Ag

01/12/17 / #20170012495

Vibration damper comprising a generator connection

A vibration damper having a cylinder filled with pressurized medium and a displacer that drives a generator. The vibration damper has a resilience element that compensates pressure peaks from the displacer movement relative to the generator. ... Zf Friedrichshafen Ag

01/12/17 / #20170012494

Vibration damper comprising a generator connection

A vibration damper having a cylinder filled with pressurized medium and in which a displacer drives a generator. The vibration damper has a compensation element that compensates pressure peaks from the displacer movement relative to the generator. ... Zf Friedrichshafen Ag

01/12/17 / #20170009875

Device and method for adjusting motion of an operating element for an automatic transmission of a vehicle and shifting device for shifting an automatic transmission of a vehicle

The disclosure provides a device for adjusting a movement of an operating element for an automatic transmission of a vehicle. The device comprises a rotatable shaft and a bearing apparatus for the supporting of the operating element. ... Zf Friedrichshafen Ag

01/12/17 / #20170009866

Transmission device with a hydraulic system

A hydraulic system for a transmission device includes a primary pressure circuit and a secondary pressure circuit suppliable with hydraulic fluid from a defined saturation condition of the primary pressure circuit. A converter lock-up clutch is subjected to an operating pressure by a converter clutch valve. ... Zf Friedrichshafen Ag

01/12/17 / #20170009865

Torque converter

A torque converter includes a torsional damper assembly. The torsional damper assembly includes a damper. ... Zf Friedrichshafen Ag

01/12/17 / #20170009842

Vibration damper and motor vehicle

A vibration damper with at least with at least two tube elements that are arranged one inside the other and a piston rod that is movable in a piston rod guide. A valve having a valve slide for at least partially closing at least one flow path of a fluid flowing through the valve is arranged in a region of one end of the piston rod guide. ... Zf Friedrichshafen Ag

01/12/17 / #20170009841

Valve for a vibration damper, vibration damper, and motor vehicle

A valve for a vibration damper having a valve housing and a valve slide movable in the valve housing for at least partially closing at least one flow path of a fluid flowing through the valve. The valve has an input side and an output side. ... Zf Friedrichshafen Ag

01/12/17 / #20170009840

Vibration damper having an end stop

Vibration damper with an end stop operated through a damping medium, includes a cylinder in which a piston rod is guided so as to be axially movable, wherein the piston rod controls a choke ring which limits a compression space starting from a defined stroke position of the piston rod at a cylinder-side wall having reduced diameter, wherein the cylinder has at least one working chamber which is filled with the damping medium and which is connected to the compression space via at least one choke orifice, wherein the choke ring has at least one pressure compensation channel via which a surface of the choke ring facing in direction of the wall on the cylinder side is connected to compression space with respect to the cross section of the choke ring, and the outflow from the pressure compensation channel to the working chamber can be closed in a stroke-dependent manner.. . ... Zf Friedrichshafen Ag

01/12/17 / #20170009839

Vibration damper, and piston valve for a vibration damper

A vibration damper includes a piston rod (2) which transitions into a piston rod neck (4) while forming a contact shoulder (6) and guides a piston valve (1) at this piston rod neck (4), this piston valve (1) is pretensioned against the contact shoulder (6) of the piston rod (2). To reduce variances in damping force in batch fabrication of the vibration damper, a compensating disk (20) is fitted axially between the contact shoulder (6) and the piston valve (1), which compensating disk (20) is produced from a material with a lower yield strength compared to the piston rod (2) and/or compared to an immediately succeeding component of the piston valve (1).. ... Zf Friedrichshafen Ag

01/12/17 / #20170008569

Holder for a suspension strut

A holder (1) for a shock-absorber element, in particular for a suspension strut of a motor vehicle. The holder has a supporting mounting (7) for the shock-absorber element. ... Zf Friedrichshafen Ag

01/12/17 / #20170008558

Arrangement for connecting chassis components and wheel carriers for motor vehicles

An arrangement for connecting chassis parts, in particular a screw connection, between a structure made of a fiber-plastic composite and a metallic load-introducing element, designed as a traction member. The structure is double-walled having a first wall and at least a second wall spaced from the first wall. ... Zf Friedrichshafen Ag

01/12/17 / #20170008366

Anti-roll bar for the rolling stabilization of a vehicle and method for operating such an anti-roll bar

A stabilizer (105) for the anti-roll stabilization of a vehicle (100). The stabilizer (105) has a first stabilizer element (110) and a second stabilizer element (115). ... Zf Friedrichshafen Ag

01/12/17 / #20170008361

Chassis system for a motor vehicle

A chassis arrangement (10), in particular for utility vehicles (1), with at least one axle (3) that extends transverse to the travel direction and carries wheels (4). Movement of the axle (3) is damped by vibration dampers (11) provided with end sections (15), and with at least one stabilizer assembly (12) that has two longitudinally extending sections (13) and a transverse section (14) that connects the longitudinally extending sections. ... Zf Friedrichshafen Ag

01/05/17 / #20170002922

Device reducing drag loss in an automatic transmission

A drag torque reduction device for an automatic transmission includes a hydraulic controller with a radiator. In one embodiment, the drag torque reduction device also includes a parallel connection of a pressure relief valve, a constant aperture and a temperature-dependent, switchable aperture positioned upstream of the radiator. ... Zf Friedrichshafen Ag

01/05/17 / #20170002887

Preloading device for a piston valve of a vibration damper

A preloading device for a piston valve of a vibration damper includes a spring element which is fitted by an inner diameter onto a radially inner centering device which serves for inner centering of the spring element in the installed state of the preloading device. To provide a preloading device for a piston valve by which a reliable inner centering of a spring element can be ensured but which can be placed with low expenditure on assembly at the same time, the spring element is axially fixed at the centering device via retaining means in that the retaining means at least partially enclose the spring element axially on both sides and are rigidly connected to the centering device in each instance.. ... Zf Friedrichshafen Ag

01/05/17 / #20170001512

Transmission, hybrid drive train, and drive train for an electric vehicle

A transmission includes a main gear set, an auxiliary gear set and an electric motor with a rotor and a stator. A third shaft of the main gear set is connected to a transmission output shaft. ... Zf Friedrichshafen Ag








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