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Zf Friedrichshafen Ag patents


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


Device for high/medium/low voltage current measurement

The disclosure relates to a device for measuring an electrical current flow comprising a printed circuit board, a sensor component for detecting magnetic fields, said sensor component being arranged on a surface of the printed circuit board, and a conducting element for conducting the current that is to be measured, wherein at least a first portion of the conducting element between a first end of the conducting element and a second end of the conducting element is arranged such that the sensor component is situated between the surface of the printed circuit board and the first portion of the conducting element, such that the sensor component monitors a magnetic field generated by the current flowing through the conducting element.. . ... Zf Friedrichshafen Ag

Hydraulic system of an automatic gearbox

A hydraulic system (1) of an automatic transmission of a motor vehicle includes a hydraulic pump (2) powered by a drive engine for supplying pressure to the hydraulic system (1). A hydraulic reservoir (10) by which, when the drive engine is at rest, a pressure drop in a main pressure circuit (7) of the hydraulic system (1) can at least be delayed. ... Zf Friedrichshafen Ag

Multi-stage planetary gear mechanism for a wind turbine, comprising a special lubricant guide

A multi-stage planetary transmission for a wind turbine includes a transmission housing having an oil supply channel disposed therein; an input-side first planetary stage disposed in the transmission housing; at least one second planetary stage disposed downstream of and connected to the first planetary stage by a spline of a sun gear shaft of the first planetary stage; a first oil conducting channel supplied by the oil supply channel and configured to supply oil to planetary gear bearings of the first planetary stage; a second oil conducting channel supplied by the oil supply channel and disposed so as to pass through a planet carrier of the second planetary stage at least partially in an axial direction, the second oil conducting channel configured to supply oil to planetary gear bearings of the second planetary stage; and a third oil conducting channel supplied by the oil supply channel.. . ... Zf Friedrichshafen Ag

Method for actuating a differential lock of a differential in a motor vehicle drivetrain

The invention concerns a method for actuating a differential lock of a differential in a motor vehicle drive-train, such that when a locking command has been issued the differential lock is engaged as soon as there is essentially no rotational speed difference at the differential lock (s8). To carry out a comfort-orientated actuation of the differential lock, when the locking command has been issued but before the differential lock is engaged, it is first checked whether there is a rotational speed difference at the differential lock (s6). ... Zf Friedrichshafen Ag

Assembly having a brake cylinder and an electromechanical brake booster

The invention relates to an assembly for a vehicle brake system, which comprises at least one brake cylinder and an electromechanical brake booster, having a drive arrangement for driving at least one actuating device designed for actuating a brake cylinder, wherein the drive arrangement has at least one electric motor and a gear mechanism for coupling the electric motor to the at least one actuating device, wherein at least one fastening device is provided for fastening the assembly to a vehicle, said fastening device defining a fastening plane. According to the invention the rotary shaft of the electric motor is arranged perpendicular to the longitudinal axis of the actuating device and at an angle of between 60° and 120° to the fastening plane.. ... Zf Friedrichshafen Ag

Method for operating a system of an agricultural machine and at least one device arranged thereon

A method for operating a system including an agricultural working vehicle on which at least one working device is arranged, which working device, when moving across a field, is operated along a current linear row. A control unit is associated with the working vehicle and the sensor unit is arranged on the working device. ... Zf Friedrichshafen Ag

Method and control device for operating a transmission

A method for operating a drivetrain of a motor vehicle includes elevating a system pressure acting on a plurality of shift elements (a, b, c, d, e, f) when one of at least one positively locking shift element (a, f) is closed in a force-locking-free state, increasing a torque output by a drive assembly (15) and then subsequently reducing the torque output by the drive assembly (15) while the system pressure is elevated by an intervention with the drive assembly (15), and reducing the system pressure after reducing the torque output by the drive assembly (15). The one of the at least one positively locking shift element (a, f) closed in the force-locking-free state or another one of the at least one positively locking shift element (a, f) is opened while the system pressure is elevated and the torque output by the drive assembly (15) changes.. ... Zf Friedrichshafen Ag

Lubricating device for a transmission, and transmission comprising said lubricating device

A greaser for a transmission includes a shaft (1) having an axial bore (3) and a plurality of axially spaced radial bores (6a, 6b, 6c). Each of at least one tube (8a, 8b) is inserted into a respective one of the axially spaced radial bores (6a, 6b) and extends radially inwardly into the axial bore (3) beyond a circumferential surface (4) of the axial bore (3) that is adjacent the respective one of the axially spaced radial bores (6a, 6b). ... Zf Friedrichshafen Ag

Vehicle transmission

A transmission for a motor vehicle wherein the drive shaft (an) is rotationally fixedly connectable by the first shift element (k3) to the first shaft (1) and the first shaft is rotationally fixedly connectable by the second shift element (b2) to the housing (2). A sun gear of the first planetary gear set (rs1) is rotationally fixedly connectable by the third shift element (k2) to the drive shaft (an). ... Zf Friedrichshafen Ag

Vehicle transmission

A transmission for a motor vehicle wherein the drive shaft (an) is rotationally fixedly connectable by the first shift element (k1) to the first shaft (1) and by the second shift element (k2) to the second shaft (2). The second shaft (2) is rotationally fixedly connectable by the fifth shift element (b2) to the housing (3). ... Zf Friedrichshafen Ag

Clutch assembly

A clutch arrangement is formed with drive-side and, output-side clutch elements and a clutch piston for operative connection and disengagement between the drive-side and output-side clutch elements. Associated with at least two clutch elements is an elastically deformable clutch element working mechanism through which the corresponding clutch elements can be acted upon in direction away from one another by an axial force to assist disengagement of the drive-side and output-side clutch elements. ... Zf Friedrichshafen Ag

Independent suspension system with a high steering angle

A wheel suspension system (101) with at least one wheel support (103), first and second coupling rods (105, 107) and at least one track rod (109). The first and second coupling rods (105, 107) are connected to one another in an articulated manner. ... Zf Friedrichshafen Ag

Mechanical component having a force sensor

A mechanical component for a vehicle, having a measurement region with a surface, and at least one force sensor associated with the measurement region for detecting a force to which the component is exposed. The component (3) has, disposed in the measurement region, a hollow body (3b) with a cavity (4) in which the at least one force sensor (7) can be positioned.. ... Zf Friedrichshafen Ag

Method for operating an automatic transmission of a motor vehicle

A method of operating an automatic transmission of a motor vehicle, in which a hydraulic pump associated with a hydraulic system for the supply of pressure is driven by a drive motor. When the motor vehicle starts, a hydrodynamic starting element forms a driving connection between the drive motor and the automatic transmission. ... Zf Friedrichshafen Ag

08/23/18 / #20180238442

Method for operating an automatic gearbox of a motor vehicle

A method for operating an automatic transmission (1) of a motor vehicle in which a hydraulic pump, associated with a hydraulic system, for supplying pressure in the hydraulic system is driven by a drive engine and in which hydraulic shifting elements (b1, b2, b3, c1, c2) are actuated to engage gear steps. According to the method, before the drive engine is turned off for a short duration of time, at least one non-actuated shifting element (b1, b2, b3, c1, c2) of the automatic transmission (1) is actuated or filled with pressure oil.. ... Zf Friedrichshafen Ag

08/23/18 / #20180238427

Double gearbox, and method for engaging an overall gear ratio therein

A double clutch transmission having a first and a second input shaft; a countershaft; a drive output shaft; a first sub-transmission having two gearsets, of which one gearset can be selectively connected to transmit torque between the first input shaft and the countershaft; a second sub-transmission having two gearsets, of which one gearset can be selectively connected to transmit torque between the second input shaft and the countershaft; and a third sub-transmission having one gearset which can be connected to transmit torque between the countershaft and the drive output shaft. In this case, one of the gearsets of the first sub-transmission coincides with one of the gearsets of the second sub-transmission.. ... Zf Friedrichshafen Ag

08/16/18 / #20180231435

Rotating drum of a tire, wheel, and/or chassis test stand

A rotating drum of a fire, wheel and/or chassis test stand, with an essentially cylindrical running surface (15). The rotating drum of a tire having a hub, side disks arranged on the hub, which in the area of their circumference (3a, 4a) have fixing areas, and a plurality of segments (7) which form the running surface (15) of the rotating drum (1,21). ... Zf Friedrichshafen Ag

08/16/18 / #20180231114

Housing for a transmission

A housing for a transmission, in particular an actuator housing. The housing having a housing wall and ribs that protrude from the housing wall to the outside and/or inside. ... Zf Friedrichshafen Ag

08/16/18 / #20180231051

Ball joint for a vehicle with a tilt angle measuring device

A ball joint (1) for a vehicle, with a housing (2) and a ball stud (3) that extends in an axial direction (a) and includes a joint ball (4) which, with its joint ball (4), is fitted into and can pivot in the housing (2) and which extends outward through an opening (8) of the housing (2). At least one sensor (6) serves to detect a tilt angle (a) between the ball stud (3) and the housing (2). ... Zf Friedrichshafen Ag

08/16/18 / #20180229766

Steering or track rod having an integral connecting pipe

A connecting tube for connecting two joint attachments of a steering or track rod. The connecting tube is reinforced by at least one tube section connected by friction force to the connecting tube such that either the entire outer or inside wall the tube section is in contact against a wall of the connecting tube, thereby forming a press fit connection. ... Zf Friedrichshafen Ag

08/16/18 / #20180229717

Drive train of a mobile vehicle

A drive-train has an internal combustion engine (1) with an exhaust gas turbocharger, which drives a vehicle wheel (3) by way of a power-branching transmission (2). When there is an increase of the power demanded from the combustion engine (1) but the exhaust gas turbocharger is not yet producing the required charging pressure, an additional motor (4) is always switched into the drive-train in order to deliver torque to the drive-train.. ... Zf Friedrichshafen Ag

08/16/18 / #20180229701

Stabilization of a vehicle combination

A vehicle combination comprising a tractor vehicle and a trailer vehicle, each vehicle including wheels on different sides of the vehicle and wheel brakes associated with the wheels. A method for controlling the vehicle combination includes determining a yaw rate difference between a yaw rate of the tractor vehicle and a yaw rate of the trailer vehicle; determining, on the basis of the yaw rate difference, that an orientation of one of the vehicles deviates from an intended travel direction of the vehicle combination; and activating a wheel brake of the vehicle on only one side of the vehicle in order to counter the orientation deviation of the vehicle relative to the intended travel direction.. ... Zf Friedrichshafen Ag

08/16/18 / #20180229577

Roll stabilization system for a motor vehicle

A roll stabilization system (1) for a motor vehicle which has a dc voltage converter (6) associated with an electric roll stabilizer (2). By way of the dc voltage converter, a feed voltage can be transformed into a supply voltage for the roll stabilizer (2). ... Zf Friedrichshafen Ag

08/16/18 / #20180229573

Chassis arrangement, method for levelling a motor vehicle, control device and motor vehicle

A chassis arrangement and method for leveling a vehicle with at least one vibration damper permitting an active height adjustment. The chassis arrangement has a stabilizer having a restoring force that rises with a first slope during a transverse acceleration in a first range up to a first threshold value and has a restoring force which rises with a second slope after the first threshold value in a second range. ... Zf Friedrichshafen Ag

08/02/18 / #20180216698

Torsional vibration damper

A torsional vibration damper for damping a vibration component of a rotational movement around an axial direction has a damper mass to carry out an oscillation to damp the vibration component, a damper mass carrier to movably guide the damper mass, and a supporting body in contact with or can enter into contact with the damper mass in at least one operating situation of the torsional vibration damper. The supporting body is connected to the damper mass carrier to drive the supporting body relative to the damper mass carrier during rotation of the torsional vibration damper, and a support structure formed together with the supporting body to radially support the supporting body under a first operating condition and to radially release the supporting body under a second operating condition which differs from the first operating condition.. ... Zf Friedrichshafen Ag

08/02/18 / #20180216697

Tuned mass damper

A tuned mass damper for damping a vibration component of a rotational movement around an axial direction includes a damper mass configured to perform an oscillation to damp the vibration component, a damper mass carrier to movably guide the damper mass, and a supporting body in contact with or to enter into contact with the damper mass in at least one operating state of the tuned mass damper. The supporting body has a catch structure d the damper mass carrier has a catch aperture via which the supporting body is connected to the damper mass carrier to secure the supporting body relative to the damper mass carrier in axial direction.. ... Zf Friedrichshafen Ag

08/02/18 / #20180216689

Air spring for a motor vehicle

An air spring for a motor vehicle having a rolling bellows filled with gas under pressure, one end of the rolling bellows is connected to a load receiver and the other end is fastened to a roll-off piston’. The load receiver and the roll-off piston are moveable relative to one another depending on a force impinging on the load receiver toward the roll-off piston. ... Zf Friedrichshafen Ag

07/19/18 / #20180202548

Vehicle drive train and method for operating a drive train

A vehicle drive-train with a drive engine, a drive output and a transmission device connected in the power flow between the drive engine and the drive output. The transmission device has at least two transmission units whose transmission ratios can be varied continuously, at least in some ranges, and which are arranged in power-trains running parallel with one another between the drive engine and the drive output. ... Zf Friedrichshafen Ag

07/19/18 / #20180202540

Powertrain of a vehicle

A drive-train of a vehicle with at least a drive motor (1) and a transmission (2) in which at least one torque sensor (6, 6a) is provided for control purposes. The torque sensor (6, 6a) is integrated in a transmission component in order to determine, at the time, the applied torque.. ... Zf Friedrichshafen Ag

07/19/18 / #20180202520

Transmission for a motor vehicle

A transmission (g) for a motor vehicle includes a drive shaft (gw1), an output shaft (gw2), a first and a second planetary gear set (p1, p2), and a first, second, third, fourth and fifth shift element (04, 13, 14, 26, 36). Six forward gear ratios (1-6) between the drive shaft (gw1) and the output shaft (gw2) are engagable through selective pairwise closure of the five shift elements (04, 13, 14, 26, 36) and rotationally fixed immobilization of the sun gear (e11) of the first planetary gear set (p1).. ... Zf Friedrichshafen Ag

07/19/18 / #20180202519

Transmission for a hybrid vehicle, drive train for a hybrid vehicle having such a transmission, and method for starting up a hybrid vehicle

A transmission (g) for a hybrid vehicle includes a drive shaft (gw1), an output shaft (gw2), three planetary gear sets (p1, p2, p3), an electric motor (em) with a rotationally fixed stator (s) and with a rotatable rotor (r), and five shift elements (03, 04, 05, 14, 15). Six forward gear ratios (1 to 6) and one reverse gear ratio (r1) are formable through selective pairwise closure of the five shift elements.. ... Zf Friedrichshafen Ag

07/19/18 / #20180202470

Valve

A valve (1) having a valve housing (2) with at least one supply connection (p), a working connection (a) and an outlet opening (t), as well as a valve piston (3) that is arranged and able to move axially within the valve housing (2). The outlet opening (t) provided in the valve housing (2) has at least first and second control edges (4, 5).. ... Zf Friedrichshafen Ag

07/19/18 / #20180201368

Control rod for adjusting a rotor blade of a helicopter

The invention relates to a control rod for the adjusting of a helicopter rotor blade, wherein the control rod can be adjusted in longitudinal direction, comprising: at least one contact area element, at least one limit stop element, which is designed to limit the adjustability of the control rod in longitudinal direction to a specifiable adjusting range in interrelation with the at least one contact area element, wherein the limit stop element can be transferred from a first position to a second position, wherein the at least one stop element limits the adjustability of the control rod in the first position and enables the adjustability of the control rod beyond the specifiable adjusting range in the second position.. . ... Zf Friedrichshafen Ag

07/19/18 / #20180201085

Drivable twist-beam rear axle having a transverse profiled element and longitudinal control arms connected to the transverse profiled element at the ends thereof

A drivable torsion beam axle (2) with a transverse profiled element and trailing arms (1) connected, at each end, to the profiled element is described, within which, at least in some areas, a drive-train (7) is arranged in each case and by which the torsion beam axle (2) can be connected to a vehicle body. The trailing arms (1) are, in each case, made as two-component housing castings with a housing plane of division extending in the longitudinal direction.. ... Zf Friedrichshafen Ag

07/19/18 / #20180201084

Adjustable spring support

Adjustable spring support comprising a spring plate which is axially adjustable by means of an annular actuator, wherein the actuator is supplied with pressure medium via a pressure medium supply system, wherein adjustable spring support comprising a spring plate which is axially adjustable by means of an annular actuator, wherein the actuator is supplied with pressure medium via a pressure medium supply system, wherein the annular actuator has a pressure medium connection to the pressure medium supply system, and the housing thereof is connected directly to a housing of the pressure medium supply system.. . ... Zf Friedrichshafen Ag

07/19/18 / #20180201082

Ball journal with a press on annular body and ball joint with said type of ball journal

A ball stud (21) for a ball joint (20) having an annular body (22) pressed onto the ball stud (21). The annular body (22) is held fast to the ball stud (21) by at least one circumferential securing element to prevent loosening, that acts between the ball stud (21) and the annular body (22) and is in the form of a deformation edge (23). ... Zf Friedrichshafen Ag

07/19/18 / #20180201081

Longitudinal control arm device of a drivable semi-independent suspension

A trailing arm device (1) of a drivable torsion beam axle (2) is described. The trailing arm device (1) has a housing (5) in which a drive-train (8) can be arranged and is connected to a trailing arm (4). ... Zf Friedrichshafen Ag

07/12/18 / #20180196411

Method and device for determining an energy-efficient operating point

A method of determining an energy-efficient operating point of a machine tool of a machine tool system with which identical workpieces for processing can be supplied to the machine tool sequentially in time. The machine tool has an operating point dependent machine cycle time and an operating point dependent power demand. ... Zf Friedrichshafen Ag

07/12/18 / #20180195561

Frictional shifting element for a vehicle transmission

A frictional shift element for a transmission of a vehicle, including a first friction element and a second friction element, wherein one friction element of the first and second friction elements has an approximately annular friction surface, and the other friction element of the first and second friction elements has an approximately annular base body and a plurality of friction surface elements distributed over a periphery of the approximately annular base body. The friction surface and the plurality of friction surface elements are brought into contact with each other in an overlap area for transmitting torque, wherein the friction surface elements protrude radially into the overlap area. ... Zf Friedrichshafen Ag

07/12/18 / #20180194394

Method for steering a vehicle, controller for a motor vehicle, and motor vehicle

A method of steering a vehicle having a front axle steering mechanism and, in particular, a rear axle steering mechanism. It is proposed that interventions are carried out at the rear axle to maintain the vehicle on course, at the same time, interventions are carried out at the front axle steering mechanism to avoid a restoring self-alignment of the front wheels.. ... Zf Friedrichshafen Ag

07/05/18 / #20180187760

Transmission arrangement, overall transmission and mobile agricultural machine

A transmission assembly including a torque input shaft and a torque output shaft and input idler gears, input fixed gears and shift elements, each of which is associated with an input idler gear, are arranged on the torque input shaft, and output idler gears, output fixed gears and shift elements, each of which are associated with an output idler gear, are arranged on the torque output shaft, with the result that a plurality of different torque transmission paths from the torque input shaft to the torque output shaft may be implemented. The transmission arrangement has an additional torque transmission path that may be implemented. ... Zf Friedrichshafen Ag

07/05/18 / #20180187738

Frequency-dependent damping valve arrangement

A damping valve arrangement for a vibration damper is disclosed. This damping valve arrangement includes a damping piston with a check valve and a control arrangement with a control pot and a control piston that is axially movable therein. ... Zf Friedrichshafen Ag

07/05/18 / #20180187737

Frequency-dependent damping valve arrangement

A damping valve arrangement for a vibration damper includes a damping piston with a check valve and a control arrangement with a control piston. A spring element is arranged between the control piston and the check valve that loads a valve disk axially in direction of a flow channel and the control piston in direction of the pot base 30 with a defined spring force. ... Zf Friedrichshafen Ag

07/05/18 / #20180187726

Friction element for a frictional shifting element for a vehicle transmission

A friction element (1, 3) for a frictional shift element for a transmission of a vehicle, the friction element having an annular base body with a plurality of friction surface elements (5), the plurality of friction surface elements (5) protruding radially inwardly or radially outwardly and are distributed over a periphery of the annular base body. The friction element (1, 3) and the plurality of friction surface elements (5) are each formed as one piece.. ... Zf Friedrichshafen Ag

07/05/18 / #20180187715

Axial ball joint

Axial ball joint (1), particularly for use in a steering gear (7), which includes a joint housing (2) open on a first side for receiving a joint ball (4) attached to a joint stud (5). A housing stud (3) is arranged on the joint housing (2). ... Zf Friedrichshafen Ag

06/28/18 / #20180180145

Spindle drive and an actuator comprising a spindle drive

A spindle drive (1) having a spindle (2) with a spindle thread (2a), and spindle nut (3) with a nut thread (3a). The spindle thread (2a) and the nut thread (3a) form a movement thread (4) having a crown clearance (5), a root clearance (6) and a flank clearance. ... Zf Friedrichshafen Ag

06/28/18 / #20180180139

Automatic transmission of a vehicle, comprising a central synchronizing device, and method for operating an automatic transmission

An automatic transmission (3) of a vehicle having a central synchronization device (8) with at least one shift element (33; 9, 10) assigned to a transmission input shaft (32; 6, 7) and being a friction locking brake, an actuating device (14) driven by supplying energy, and at least one transmission region (34; 12, 13) disposed between the brake and a transmission output shaft (30), an operative connection between the transmission input shaft and the transmission output shaft and different transmission ratios are producible over the at least one transmission region. The brake is transferable with the operative connection and the actuating device (14) into an operating state in which a transmission input shaft (6) interacting with the brake (33; 9, 10), is held in a rotationally fixed manner by the brake (33; 9, 10), wherein the brake (33; 9, 10) is held by the actuating (14) without any energy infeed.. ... Zf Friedrichshafen Ag

06/28/18 / #20180180134

Frequency-dependent damping valve arrangement

A damping valve arrangement (1) for a vibration damper includes a damping piston (2) with a check valve, which damping piston (2) divides a cylinder (31) of the vibration damper into a first working chamber (32) and a second working chamber (33), and a control arrangement (3) with a control pot (8) and a control piston (9) which is axially movable therein. A connection channel (41) connects the first working chamber (32) to the second working chamber (33). ... Zf Friedrichshafen Ag

06/28/18 / #20180178607

Joint connection and arrangement for mounting a wheel

An articulated joint (1) for the articulated connection of a first chassis component (2) to a second chassis component (3), which includes a joint body (4) with a central axis (m) and a rotational axis (a). A housing (6) holds the joint body (4) such that the joint body (4) can be attached to the first chassis component (2) and the housing (6) can be attached to the second chassis component (3). ... Zf Friedrichshafen Ag

06/21/18 / #20180172155

Parking lock gear mechanism, and method for operating a parking lock gear mechanism of a vehicle

The present disclosure describes a parking lock gear mechanism including a planetary gear train with a sun gear, a ring gear, and at least one planet gear that meshes with the sun gear and the ring gear. The at least one planet gear may be attached to a rotating planet carrier. ... Zf Friedrichshafen Ag

06/21/18 / #20180172153

Control arrangement for a transmission brake with a quick exhaust valve

An assembly (12) for actuating a transmission brake (1) that has a transmission brake cylinder (7), at least one control valve (16, 17) for controlling pressurizing and/or exhausting of the transmission brake cylinder (7), and at least one pressure line (14) via which the at least one control valve (16, 17) is connected to the transmission brake cylinder (7) to supply a pressure medium (10) to and discharge the pressure medium (10) from a pressure chamber (9) of the transmission brake cylinder (7). The assembly (12) includes a quick-exhaust valve (15), which is arranged in the pressure line (14) between the transmission brake cylinder (7), and the at least one control valve (16, 17).. ... Zf Friedrichshafen Ag

06/21/18 / #20180172152

Method and control device for operating a motor vehicle

A method for operating a motor vehicle having a transmission (1), the method including closing a first number of shift elements and opening a second number of shift elements in each selected, force locking gear ratio of the transmission (1); closing one shift element less, and therefore opening one shift element more than in a selected, force locking gear ratio when a transmission (1) is not force locking in the sailing mode; adjusting the respectively closed and opened shift elements as a function of at least one operating condition of the motor vehicle in the sailing mode; and checking, at least on the basis of the rotational speed of the transmission input shaft (2), whether a previously closed, positively locking shift element (a, f) to be opened is actually opened in the sailing mode during adjusting of the respectively closed and opened shift elements.. . ... Zf Friedrichshafen Ag

06/21/18 / #20180172142

Shift control method for an automated range-change transmission

A method of controlling the gear shifting of an automatic range-change transmission, which is arranged between a drive engine and a final drive in a drive train of a motor vehicle and includes at least one mufti-stage main transmission, a two-stage front-mounted group upstream of the main transmission, and a transmission brake. The main transmission can be shifted, via unsynchronized clutches, and the front-mounted group can be shifted, via synchronized clutches. ... Zf Friedrichshafen Ag

06/21/18 / #20180172106

Damping valve

A damping valve includes a valve body with a stepped opening for receiving a preloading spring which acts on a tension rod at which is arranged a valve disk which at least partially closes a flow-out orifice of a flow channel which connects two opposite valve body sides to one another, and, in addition to the preloading spring force, a damping force which counteracts a swiveling movement of the valve disk acts on the tension rod. The additional damping force is formed by a displacer on the tension rod side. ... Zf Friedrichshafen Ag

06/21/18 / #20180170136

Independent suspension

An independent wheel suspension includes a knuckle which is supported on a spring support connected to a vehicle body. The knuckle is connected to the spring support via a knuckle pin and is arranged so as to be mounted rotatably around a longitudinal axis a of the knuckle pin. ... Zf Friedrichshafen Ag

06/21/18 / #20180169817

Method and device for reducing the energy demand of a machine tool and machine tool system

A method for reducing an energy demand of a machine tool (2, 3, 4) of a machine tool system (1), wherein the machine tool system (1) comprises at least a first machine tool (3), with a first machine cycle time, and a second machine tool (4), with a second machine cycle time. Identical workpieces (9) are transported sequentially in time for processing (101, 107), first to the first machine tool (3) and then to the second machine tool (4). ... Zf Friedrichshafen Ag

06/14/18 / #20180163792

Claw shifting element

A shift element (4) for an automatic transmission having a hydraulically actuable piston; at least one hydraulic duct (10); an axially movable first shift element half (3, 7) operatively connected to the piston; a second shift element half (8); a bearing carrier (9); a ring-shaped component (1); and a hall sensor (6) in the bearing carrier (9). The first shift element half (3) has a notch-like encoder contour (5) for the hall sensor (6). ... Zf Friedrichshafen Ag

06/14/18 / #20180163775

Ball joint

A ball joint having a housing, an opening and an inner circumferential surface facing the opening and extending around a longitudinal axis. The housing holds a ball socket that opens toward the opening and has an overlap region that is inclined radially inward, in the direction of the opening, and which, with the circumferential surface, delimits an annular space. ... Zf Friedrichshafen Ag

06/14/18 / #20180162402

Method for controlling a rolling mode or a freewheel mode of a vehicle

A method for controlling a rolling or a freewheeling mode of a vehicle having a drive-train with an engine, an automatic or automated transmission and controllable means for interrupting force flow in the drive-train. A current vehicle position and a first road stretch, between the current vehicle position and a road stretch section ahead along which a speed limit applies, are determined. ... Zf Friedrichshafen Ag

06/07/18 / #20180156315

Transmission device having a transmission input shaft, having a transmission output shaft and having three planetary gear sets

A transmission system (1) including a transmission input shaft (2), a transmission output shaft (3), and three planetary gear sets (p1, p2, p3) having a total of seven interface shafts (w1-w7). The planetary gear sets (p1, p2, p3) are at least partially functionally connected to each other by planetary gear set shafts (s1-hr3), are at least partially connectable to each other through a plurality of shift elements (b1, b2, k1-k3; b1-b3, k1-k3), and are coupled to the seven interface shafts (w1-w7) by the planetary gear set shafts (s1-hr3) such that at least six gear ratios (1vm-6vm, r1vm, r2vm) are selectable such that the transmission input shaft (2) and the transmission output shaft (3) revolve with the same or different direction of rotation.. ... Zf Friedrichshafen Ag

06/07/18 / #20180156298

Damping valve mechanism

A damping valve device includes an actuator which carries out an axial displacing movement on a sliding sleeve. The sliding sleeve, along with a fixed valve carrier, forms a slide valve which has two flow directions. ... Zf Friedrichshafen Ag

06/07/18 / #20180154770

Portal axle

The invention is directed to a portal axle for low-slung vehicles, comprising a portal housing 1, 1′ into the interior 2 of which is guided proceeding from an axle bracket side a drive shaft 17 on which a drive wheel 3 is arranged so as to be fixed with respect to rotation relative to it, with intermediate wheels 4 which are rotatably mounted on bearing pins 12 in the portal housing 1, 1′ and which can be rotatably driven by the drive wheel 3 and by means of which an output wheel 5 which is arranged in the portal housing 1, 1′ on an output shaft so as to be fixed with respect to rotation relative to it can be rotatably driven, this output wheel 5 projecting into a hub carrier 6 which can be fixedly connected to the portal housing 1, 1′. The drive shaft 17 and the output shaft extend so as to be axially offset, and a brake caliper of a disk brake is arranged radially adjacent to the portal housing 1, 1′. ... Zf Friedrichshafen Ag

06/07/18 / #20180154717

Wheel suspension system

A wheel suspension assembly (1) for a vehicle, having a spring damper (2), a first transverse link (4), which has a first transverse link strut (4a) and a second transverse link strut (4b), a second transverse link (5), a first tie rod (6), a second tie rod (7), a reversing lever (8), a hub carrier (9), a steering gear (10) and a pendulum support (11). Each transverse link (4, 5) has an end (12), on the hub carrier side, and two ends (13, 13a, 13b), on the chassis side. ... Zf Friedrichshafen Ag

05/31/18 / #20180149266

Transmission control system

A transmission which includes input and output shafts and first and second step-down devices for producing various step-down ratios. The first and second step-down devices are associated with first and second controllable clutches, respectively, in order to connect, in a torque-transmitting manner, the respective step-down device between the input shaft and the output shaft. ... Zf Friedrichshafen Ag

05/31/18 / #20180149265

Method for controlling a continuously variable transmission for a vehicle

A method of controlling a continuously variable transmission for a vehicle. The continuously variable transmission has a hydrostat with a position-regulating valve and is designed to co-operate in driving connection with a drive input shaft and a drive output shaft such that when the position-regulating valve is energized, the hydrostat is adjusted to accelerate the vehicle. ... Zf Friedrichshafen Ag

05/31/18 / #20180149264

Method for operating an automatic transmission control

A method of operating an automated transmission control for a powershift transmission having a plurality of powershift gears and a synchronized transmission having a plurality of synchronized gears in the drive-train of a vehicle. The drive-train includes a drive motor, the powershift transmission and the synchronized transmission, with an electronic control unit by which an upshift of the gears of the synchronized transmission and the upshift of the gears of the powershift transmission can be carried out, and to which a motor load signal representing the motor load of the drive motor and a rotational speed signal representing the rotational speed at the output of the drive motor can be sent.. ... Zf Friedrichshafen Ag

05/31/18 / #20180147909

Adjustable spring support

Adjustable spring support includes a first spring plate and a second spring plate, wherein at least one of the spring plates is axially adjustable relative to the other spring plate by an actuator, wherein the actuator is supplied with pressure medium via a pump which is driven by a motor and which is connected to a supply receptacle, wherein the motor, the pump and the supply receptacle form a constructional unit, and the constructional unit provides a cylindrical surface of the actuator.. . ... Zf Friedrichshafen Ag

05/31/18 / #20180147903

Transverse control arm

A transverse control arm (1) of an axle arrangement for a vehicle having two transverse control arm struts (2, 3) and at least three kinematics points (4, 5, 6). Each of the two transverse control arm struts (2, 3) has a carrier hub end (9) and a carriage end (10). ... Zf Friedrichshafen Ag

05/24/18 / #20180142785

Shift control method for an automated range-change transmission

A method for shift control of an automated auxiliary transmission that is mounted in a drive train of a motor vehicle between a drive motor (am) and a final drive, and includes at least one multi-step main gearing (hg) and one two-step front-mounted group (vg) connected upstream of the main gearing (hg), and with which the main gearing (hg) can be shifted via unsynchronized clutches and the front-mounted group can be shifted via synchronized clutches. Depending on the currently existing driving or operating situation, a gear change is performed in the auxiliary transmission through a change in the transmission ratio step (g1, g2, g3) of the main gearing (hg) while maintaining the currently engaged transmission ratio step (k1, k2) in the front-mounted group (vg).. ... Zf Friedrichshafen Ag

05/17/18 / #20180134144

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

A transmission (g) for a motor vehicle comprising an upstream gear set (vrs), a main gear set (hrs) with a total of four shafts (w1, w2, w3, w4) referred to in order of rotational speeds as first, second, third and fourth shafts, an electric machine (em), and at least five shift elements (a, b, c, e, f), the selective pairwise closure of which realizes at least eight selectable forward gear ratios (g1-g8) between a drive shaft (gw1) and an output shaft (gw2) of the transmission (g). The upstream gear set (vrs) provides a rotational speed at a fifth shaft (w5) increased relative to the rotational speed of the drive shaft (gw1), in a fixed transmission ratio with respect to the drive shaft (gw1). ... Zf Friedrichshafen Ag

05/17/18 / #20180134141

Transmission for a motor vehicle and hybrid drive train provided therewith

A transmission (g) for a motor vehicle includes three planetary gear sets (p1, p2, p3), an electric motor (em) and five shift elements (b1, k1, k2, k3, k4). Selective engagement of the five shift elements (b1, k1, k2, k3, k4) realizes at least eight selectable forward gear ratios (g1-g8) between an input shaft (gw1) and an output shaft (gw2) of the transmission (g).. ... Zf Friedrichshafen Ag

05/17/18 / #20180134140

Transmission for a motor vehicle, drive train for a hybrid vehicle, and method for operating such a drive train

A gearbox (g) for a motor vehicle having a drive shaft (gw1); an output shaft (gw2); an electric machine (em); and first and second minus planetary gear sets (p1,p2), the first planetary gear set (p1) being a stepped planetary gear set. A ring gear (e31) of the first planetary gear set (p1) is rotationally fixedly immobilizable via a fourth shift element (06). ... Zf Friedrichshafen Ag

05/17/18 / #20180134139

Transmission for a motor vehicle and hybrid drivetrain provided therewith

A transmission (g) for a motor vehicle including an input shaft (gw1), an output shaft (gw2), three planetary gear sets (p1, p2, p3) with three elements each, and five shift elements (b1, k1, k2, k3, k4). The third planetary gear set (p3) has first and second couplings (v1, v2), wherein the first coupling (v1) is between the first elements (e12, e13) of the second and third planetary gear sets (p2, p3), the second coupling (v2) is between the third element (e33) of the third planetary gear set (p3) and the output shaft (gw2), and the second element (e23) of the third planetary gear set (p3) is permanently connected to the input shaft (gw1). ... Zf Friedrichshafen Ag

05/17/18 / #20180133917

Control of a metal-cutting machining process by means of p-controller and a load-dependent control factor

A method for controlling a cutting machining process on a machine tool by a p-controller that changes a controlled variable u(t) affecting the cutting machining process based on a control deviation e(t) between a control quantity y(t) and a guide quantity w(t). To improve the control, the control factor (k) of the p-controller is variable and determined depending on instantaneous value of the control quantity y(t) via load characteristic fields. ... Zf Friedrichshafen Ag

05/10/18 / #20180128339

Vibration damper with an external housing

Vibration damper (1) with an external housing (9) includes an outer cylinder (3) with a main axis. The housing (9) having two receiving spaces (13, 15) is arranged on an outer lateral surface of the outer cylinder (3). ... Zf Friedrichshafen Ag

05/03/18 / #20180123422

Electrical machine and vehicle transmission

An electrical machine has a housing (2), a stator (3) arranged in the housing (2) in a rotationally fixed manner, and with a rotor (4) mounted so that the rotor (4) can rotate in the housing (2). A degree of freedom is provided, in the radial direction, between the housing (2) and the stator (3) so as to permit material-related thermal expansion differences between the housing (2) and the stator (3) in the radial direction. ... Zf Friedrichshafen Ag

05/03/18 / #20180119767

Damping valve for a vibration damper

A damping valve (1) for a vibration damper, includes a damping valve body (3) with at least one through-channel (13; 15) whose outlet side is at least partially covered by at least one valve disk (17; 19), wherein the at least one valve disk (17; 19) lifts from a valve seat surface (21) during impingement via the through-channel (13; 15), and a supporting disk (23), as stop, limits the lifting movement, wherein the supporting disk (23) is outfitted in direction of the valve disk (17; 19) with an elastomeric support (25) which is formed by a plurality of individual supporting elements (25).. . ... Zf Friedrichshafen Ag

04/19/18 / #20180108467

Inductive load control

A plurality of inductive loads (105) are connectable in parallel with one another between first and second terminals (120, 125), to which a controllable voltage (205) is applied. A method (300, 400) for operating the loads (105) includes the steps of detecting (305, 405) the connection of a previously non-energized load (105) between the terminals (120, 125); setting (310, 410, 435) the voltage (205) to a predetermined first value (210), and, after the lapse of a predetermined time interval (315, 415), adjusting the voltage (205) to a predetermined second value (215), with the second value (215) being lower than the first value (210).. ... Zf Friedrichshafen Ag

04/19/18 / #20180106331

Splitter gearbox, overall transmission and mobile agricultural machine

A splitter transmission including an input shaft, an output shaft and a countershaft. Two disk clutches, that can be coupled by a respective common clutch bell, are arranged on each of the input shaft, the output shaft and the countershaft. ... Zf Friedrichshafen Ag

04/19/18 / #20180105150

Method and control unit for operating a vehicle

A method of operating a vehicle (2) which recurrently travels along the same routes (1) with defined stopping points (3) along each of the routes (1). The parameters for operation of the vehicle (2) along the routes (1) are specified, on the basis of which the vehicle (2) can be braked, before the stopping points (3), and brought to rest at the stopping points (3).. ... Zf Friedrichshafen Ag

04/12/18 / #20180102304

Electronic module and method for encapsulation thereof

An electronic module of a control device of a vehicle includes at least one interconnect device, with electronic structural elements as the control unit, and at least one electronic component electrically connected to the interconnect device via a connecting region, wherein the structural elements of the interconnect device and each connecting region between the interconnect device and each dedicated electronic component are coated with an encapsulating material. Furthermore, a method for encapsulating an electronic module is disclosed.. ... Zf Friedrichshafen Ag

04/05/18 / #20180093557

Planetary gearing device having a plurality of planetary gear set shafts and at least one further rotatably supported shaft

A planetary transmission includes a plurality of planetary gear sets. Each of the plurality of planetary gear sets has a plurality of planetary gear set shafts. ... Zf Friedrichshafen Ag

03/29/18 / #20180087663

Control device for an infinite hydrostatic mechanical power split transmission

A device for controlling a gear ratio of a hydrostatic mechanical power-split transmission comprises an input switch (1) which, when rotated, produces a particular transmission characteristic and, at the same time, limits the maximum pressure. The selected position of the input switch (1) selects a particular maximum pressure curve from a large number of stored maximum pressure curves.. ... Zf Friedrichshafen Ag

03/29/18 / #20180087582

Pressure plate assembly and vehicle

A pressure plate assembly for a motor vehicle with a wear compensation mechanism which comprises a sensor element for sensing wear, wherein the sensor element has an angle lever or is constructed as an angle lever; and a motor vehicle, including such wear compensation mechanism.. . ... Zf Friedrichshafen Ag

03/22/18 / #20180080506

Clutch assembly

A rotating shifting element arrangement for an automatic transmission of a vehicle, having a cylinder element (2), is proposed, in which an actuating piston (3) for actuating a shifting element (1) is arranged in an axially movable way, a compensating cavity (4) of the shifting element (1) being provided by way of the actuating piston (3) and an oil dam (5), and wherein the oil dam (5) is fixed radially outside the piston face (6) of the actuating piston (3).. . ... Zf Friedrichshafen Ag

03/15/18 / #20180073626

Transmission

A gearbox comprising a gearbox housing at least partially surrounding a cavity, an oil sump connected to the gearbox housing and surrounding another cavity, and a separating element separating the cavity from the other cavity and having a passage through which oil located in the cavity is fed into the other cavity. The passage is arranged in a plane at an intersection line between a first oil level upper side and a second oil level upper side. ... Zf Friedrichshafen Ag

03/15/18 / #20180073612

Automatic planetary transmission

An automatic transmission with housing, input shaft, output shaft, four planetary gear sets, and six shift elements. Second element of second planetary gear set forms first shaft; second element of third planetary gear set forms second shaft; first elements of first and second planetary gear sets form third shaft; third element of third planetary gear set forms fourth shaft; second element of first planetary gear set and third element of second planetary gear set form fifth shaft; third element of first planetary gear set forms sixth shaft; first elements of third and fourth planetary gear sets form seventh shaft; and third element of fourth planetary gear set forms eighth shaft. ... Zf Friedrichshafen Ag

03/15/18 / #20180073611

Automatic planetary transmission

An automatic transmission includes first shaft, second shaft, four planetary gear sets, and six shift elements for forming different gear ratios between the first and second shafts. The first, third and fourth planetary gear sets are negative planetary gear sets and the second planetary gear set is a positive planetary gear set. ... Zf Friedrichshafen Ag

03/15/18 / #20180073610

Transmission and drivetrain for a motor vehicle

A motor vehicle transmission comprising a drive shaft, an output shaft, a planetary gear set system, and four shift elements. The first planet gear meshes with the first sun gear, first ring gear, and with one of the second planet gears. ... Zf Friedrichshafen Ag

03/15/18 / #20180072128

Active roll stabilizer of a motor vehicle and method for assembly

An active roll stabilizer of a motor vehicle including an actuator (8) in the form of a swivel motor arranged so as to rotate about a longitudinal axis of the vehicle. The swivel motor has an essentially cylindrical housing (12) with a cover, first and second stabilizer halves (18, 19) are connected to respective ends of the actuator for the transmission of torque, and a wiring harness (1) has a first end and a second end. ... Zf Friedrichshafen Ag

03/08/18 / #20180065547

Display device for displaying at least one symbol, switching device, and method for manufacturing a display device

A display device (100) for displaying at least one symbol has a translucent cover layer (210), a symbol layer (213) having a translucent symbol panel (216) for a symbol that is to be displayed by the display device (100), and an opaque surface (214) encompassing the symbol panel (216). The symbol panel (216) is disposed such that it is spaced apart from the cover layer (210) by a gap (226). ... Zf Friedrichshafen Ag

03/01/18 / #20180058549

Transmission arrangement which can be shifted under full load, and agricultural working machine

A transmission arrangement (1) for a vehicle, such as an agricultural working machine, that can be shifted under full load, including a plurality of torque-transmitting branches formed, on the drive input side, by alternatively shiftable gear stages of a splitter transmission (2) and, on the drive output side, by alternatively shiftable gear stages of a synchromesh transmission (3), so that each torque-transmitting branch is defined by engaging a gear of the splitter transmission (2) and by engaging a gear of the synchromesh transmission (3). The synchromesh transmission (3) has two input shafts (9, 10), each respectively in driving association with a powershiftable element (4, 5). ... Zf Friedrichshafen Ag

03/01/18 / #20180058548

Dual-clutch transmission

The invention proposes a dual-clutch transmission with two clutches (k1, k2), the input sides of which are connected with an input shaft (w_an) and the output sides of which are respectively connected with one of two coaxially disposed transmission input shafts (w_k1, w_k2). Further provided are at least two countershafts (w_v1, w_v2) on which idlers (i2, i3, i4, i5, ir) are rotatably mounted. ... Zf Friedrichshafen Ag

03/01/18 / #20180058547

Dual-clutch transmission

A dual-clutch transmission including first and second sub-transmissions, each having a respective input shaft. The input shafts can be coupled to a drive input shaft via a respective clutch. ... Zf Friedrichshafen Ag

03/01/18 / #20180058532

Vibration damper and vehicle

A vibration damper for a motor vehicle with a hydraulic unit and at least one valve for controlling the volume flow to the hydraulic unit, wherein the at least one valve and the hydraulic unit are arranged outside of the tube elements of the vibration damper and a motor vehicle including such vibration damper.. . ... Zf Friedrichshafen Ag

02/22/18 / #20180052010

Inductive position determination

A device for inductive positioning comprises a coil, an element for influencing a magnetic field in the area of the coil, a signal generator for providing a digital signal and a delay element with an input and an output, wherein the delay element is designed on the basis of the coil and a delay period between a signal edge at the input and a corresponding signal edge at the output is dependent on the inductance of the coil. The device further comprises a comparator to provide a digital differential impulse, whose length is dependent on a time difference of corresponding signal edges at the input and the output of the delay element, an integrator to provide a voltage depending on the length of the differential impulse and an evaluator to determine the position of the coil in reference to the coil based the voltage.. ... Zf Friedrichshafen Ag

02/22/18 / #20180051800

Multi speed transmission device with hydraulically actuated shift rods

A multi-speed transmission with hydraulically actuated shift rods, wherein an actuating pressure (p_b) is applicable by a valve device (15) and shuttle valves (2c to 6d) to piston chambers (2a to 6b) of pistons (2 to 6), the actuating pressure being adjustable by valves (16, 17). The piston chambers (2a to 6b) can be brought into operative connection with a low-pressure region (52) by the shuttle valves (2c to 6d) and a prefilling valve (32, 33) or by the shuttle valves (2c to 6d), the valve device (15), and the valves (16, 17). ... Zf Friedrichshafen Ag

02/22/18 / #20180051795

Control method for a transmission with hydraulic system comprising a variable displacement pump

A method for operating a transmission (3) with a hydraulic system comprising a variable capacity hydraulic pump, the method comprising determining during operation, a current hydraulic fluid volume requirement for actuating the transmission (3) and for temperature controlling and lubricating components of the transmission (3); setting the delivery volume of the hydraulic pump in a manner dependent on the currently determined hydraulic fluid volume requirement of the transmission (3), the delivery volume of the hydraulic pump, provided for temperature controlling and lubricating the components, being guided at least partially through a heat exchanger; wherein the delivery volume of the hydraulic pump is varied in a manner dependent on a temperature of the hydraulic fluid to an extent which sets that part of the delivery volume flow of the hydraulic pump which is to be guided via the heat exchanger.. . ... Zf Friedrichshafen Ag

02/22/18 / #20180051782

Transmission for a motor vehicle and drive train for a motor vehicle

A transmission includes a drive shaft, an output shaft, three planetary gear sets, and five shift elements, the first and second planetary gear sets are negative or minus gear sets. The third planetary gear set comprises three elements. ... Zf Friedrichshafen Ag

02/22/18 / #20180051757

Method for operating a dual-clutch transmission having a dual-clutch system comprising two clutches

A method for operating a dual-clutch transmission with two clutches. During realization of a ratio, a first clutch is closed and a second clutch is open. ... Zf Friedrichshafen Ag

02/22/18 / #20180050584

Vehicle transmission and hybrid drivetrain

A motor vehicle transmission including an interface to a drive unit, a drive shaft, an output shaft coaxial to the drive shaft, a differential transmission paraxial to the drive shaft, a device for forming gear ratios between the drive and output shafts, and an electric motor with a fixed stator and a rotatable rotor. The output shaft is connected with the differential transmission by a chain drive and a downstream gear set coaxial to the differential transmission. ... Zf Friedrichshafen Ag

02/15/18 / #20180045282

Multi-speed automatic transmission

An automatic transmission has a first clutch shaft that constantly connects first and fourth planetary gear sets, a second clutch shaft that constantly connects second and third planetary gear sets, and a third clutch shaft that constantly connects the third and first planetary gear sets. A drive shaft is constantly connected to the fourth planetary gear set; an output shaft is constantly connected to the third planetary gear set. ... Zf Friedrichshafen Ag

02/15/18 / #20180045281

Vehicle transmission

A transmission including a drive shaft, an output shaft, three planetary gear sets, and five shift elements, the first and second planetary gear sets are arranged in one gear plane, the first planetary gear set is a plus planetary gear set, and the second planetary gear set is a minus planetary gear set. The planetary gear sets are coupleable to one another to engage different gear ratios between the drive and output shafts. ... Zf Friedrichshafen Ag

02/15/18 / #20180045268

Absorber-type vibration damper

A tuned mass vibration damper (300), for example, for a drivetrain of a motor vehicle, for damping a vibration component of a rotational movement, includes at least three damper masses (110), at least one guide component part (130) to movably guide the at least three damper masses (110) such that the damper masses (110) are arranged so as to be offset along a circumferential direction (160) perpendicular to an axis of rotation (140) and can carry out the oscillations, and a damping component part (310) rotatable around the axis of rotation (140) of the rotational movement opposite to the at least one guide component part (130) and which comprises a support structure (340) and at least two damping structures (350) connected to the support structure (340). The damping structures (350) extend radially from the support structure (340) and are constructed and arranged such that one damping structure (350) of the at least two damping structures (350) when making contact with one of two adjacent damper masses (110) prevents a contact of the two adjacent damper masses (110).. ... Zf Friedrichshafen Ag

02/08/18 / #20180039297

Apparatus and method for adjusting a rotary or pivoting movement of a control element for a vehicle

Provision is made for a device for setting a rotational movement or pivoting movement of a control element for a vehicle. To this end, the device comprises a curved latching contour for defining at least a shift position of the control element. ... Zf Friedrichshafen Ag

02/08/18 / #20180038477

Sensor device for sensing a selector lever position and selector lever device for a motor vehicle

In one general aspect, the present disclosure is related to a sensor device for detecting selector lever positions of a selector lever for a motor vehicle. The sensor device may include at least four sensors and a code carrier, where the code carrier is arranged such that it is faced by the at least four sensors. ... Zf Friedrichshafen Ag

02/08/18 / #20180037080

Method of operating a motor vehicle, and motor vehicle

A method of operating a motor vehicle with a chassis system comprising at least two, preferably four vibration damper includes carrying out a body control and a wheel control with the chassis system, and controlling the energy supply for the chassis system via an energy control arrangement. A motor vehicle performing the method is also disclosed.. ... Zf Friedrichshafen Ag

02/01/18 / #20180031096

Double clutch transmission and method for operating a double clutch transmission

A dual clutch transmission including two sub-transmissions, each having an input shaft arranged on an input axis, an intermediate shaft and an output shaft which is the drive output of both sub-transmissions. The intermediate shaft can be connected to the input and output shafts. ... Zf Friedrichshafen Ag

02/01/18 / #20180031095

Double clutch transmission and method for operating a double clutch transmission

A dual clutch transmission for motor vehicles includes two sub-transmissions, each having an input shaft arranged on an input axis of the transmission. A drive output shaft on a drive output side of the transmission which is the drive output shaft of both sub-transmissions. ... Zf Friedrichshafen Ag

01/25/18 / #20180023998

Load profile

One general aspect of the present disclosure includes a control device for use in a vehicle. The control device may include a first counter and a second counter, where the first counter is assigned to a first weight range and the second counter is assigned to a second weight range. ... Zf Friedrichshafen Ag

01/25/18 / #20180023686

Method and device for producing a bearing element of a shifting device for a vehicle transmission, and bearing element and shifting device for a vehicle transmission

The invention relates to a method for the manufacturing of a bearing element of a shift device for a motor vehicle transmission. In a first process step a bearing element is provided, which comprises at least one projection and a coupling joint for the mechanical coupling of a selector lever in order to select a shift position of a motor vehicle transmission. ... Zf Friedrichshafen Ag

01/25/18 / #20180023634

Transmission and vehicle

A gear unit for a motor vehicle with a main input shaft and an auxiliary input shaft which is connected thereto via a constant gearwheel set step, wherein the constant gearwheel set step can further be connected to the output via a reverse gearwheel set step. At least one synchronized shifting clutch for connecting at least one idler gearwheel of the reverse gearwheel set step to the shaft carrying the idler gearwheel such that the idler gearwheel is fixed with respect to rotation relative to the shaft. ... Zf Friedrichshafen Ag

01/04/18 / #20180003259

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 with a pre-stage valve body, which pre-stage valve can be actuated by an electromagnetic actuator, wherein an emergency operation valve controls the main stage valve during emergency operation, wherein an emergency operation armature is preloaded on the pre-stage valve body of the pre-stage valve by an emergency operation spring so that the pre-stage valve forms the emergency operation valve.. . ... Zf Friedrichshafen Ag

12/28/17 / #20170370468

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

12/28/17 / #20170370312

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

12/28/17 / #20170369040

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

12/21/17 / #20170363151

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

12/14/17 / #20170356534

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

12/07/17 / #20170350790

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

12/07/17 / #20170350729

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

12/07/17 / #20170350489

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

12/07/17 / #20170350486

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

12/07/17 / #20170349041

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

11/30/17 / #20170343048

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

11/23/17 / #20170335954

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

11/23/17 / #20170335926

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

11/23/17 / #20170335919

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








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