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Hitachi Construction Machinery Co Ltd
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Hitachi Construction Machinery Co Ltd patents


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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "H" | Hitachi Construction Machinery Co Ltd-related inventors


Construction machine

A housing case (16) is provided on a revolving frame (5) at a position on a front side from a fuel tank (12). The housing case (16) is constituted by including a case-fixing bracket (17) having a left leg part (18), a right leg part (19), and amounting platform (20)... Hitachi Construction Machinery Co Ltd

Hydraulic energy regeneration system for work machine

A hydraulic fluid energy regeneration system for a work machine capable of securely maintaining a brake pressure even when a solenoid valve or the like is erroneously rendered open by an electrical failure is provided. The hydraulic fluid energy regeneration system for a work machine, including a first hydraulic actuator;... Hitachi Construction Machinery Co Ltd

Steering control device for working vehicle

A steering control device (20) for a working vehicle includes an electric motor device (34) that generates an assistance torque to a steering column (33), and an inverter (43). The steering control device (20) includes a load torque sensor (39) that is attached between the electric motor device (34) and... Hitachi Construction Machinery Co Ltd

Construction machine provided with preheating unit and preheating construction machine

To provide a construction machine including a novel preheating unit that can efficiently preheat entire circulation channel where fluid flows, and a preheating method of the construction machine. A bypass channel is arranged in a circulation channel through which the fluid is circulated, this bypass channel is provided with the... Hitachi Construction Machinery Co Ltd

Construction machine

A hollow first accommodating case (28) is provided on a front part of a revolving frame (5) at a position on a front side of a fuel tank (23), and a fuel supply pump (34) for supplying a fuel stored in an external fuel storage source to the fuel tank... Hitachi Construction Machinery Co Ltd

Hydraulic drive system of work machine

Disclosed is a hydraulic drive system capable of improving the fuel efficiency of a work machine by reducing the pressure loss and drag loss of a hydraulic pump. There are provided an electric motor M; a third pump P3 driven by the electric motor; a third pump hydraulic line L3... Hitachi Construction Machinery Co Ltd

Hybrid construction machine

An output command calculating section (40) of an HCU (36) restricts a battery discharge power from an electricity storage device (31) based upon a battery electricity storage rate (SOC) and a current square integrating rate (Risc) of the electricity storage device (31). Thereby, the HCU (36) transfers from a normal... Hitachi Construction Machinery Co Ltd

Display system for construction machine

A display system for a construction machine includes: a moving direction computing section for computing a predictive moving direction of a bucket; a work-tool display control section that, if the moving direction computing section predicts a movement of the bucket, changes the display position of a bucket image based on... Hitachi Construction Machinery Co Ltd

Hybrid construction machine

A motor-generator (27) is connected mechanically to an engine (21) and a hydraulic pump (23). The hydraulic pump (23) delivers pressurized oil to cylinders (12D) to (12F) in a working mechanism (12), a traveling hydraulic motor (25) and a revolving hydraulic motor (26). The revolving hydraulic motor (26) drives a... Hitachi Construction Machinery Co Ltd

Work machine, power unit, and diesel engine of work machine

Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic... Hitachi Construction Machinery Co Ltd

Display device for self-propelled industrial machine

A bird's eye view image is displayed to be recognized by an operator intuitively and precisely, irrespective of the displayed direction of the bird's eye view image. The display device has a plurality of cameras having optical axis directed obliquely downward to take images around a self-propelled industrial machine. A... Hitachi Construction Machinery Co Ltd

Control hybrid construction machine

A control apparatus for a hybrid construction machine which can continue filter regeneration without impairing the operability as far as possible irrespective of a condition of a machine body or a power storage device is provided. The control apparatus for a hybrid construction machine includes an engine, a motor generator... Hitachi Construction Machinery Co Ltd

Hydraulic drive system for work machine

When hydraulic fluid discharged from a hydraulic actuator is to be recovered for driving a different hydraulic actuator, the recovery frequency is increased to achieve further energy saving. To this end, a pressure increasing circuit 36 is provided in which a communication pressure increasing valve 12 is disposed in a... Hitachi Construction Machinery Co Ltd

Hybrid construction machinery

Provided is hybrid construction machine that can charge/discharge an electrical storage device appropriately and can suppress stop of an engine accompanying sharp increase of a load. The present invention includes a hybrid controller 22 that controls power of a hydraulic pump 17 and electric power of an inverter 15 in... Hitachi Construction Machinery Co Ltd

Construction machine management system

A construction machine management system in which a failure analysis or a failure-omen diagnosis of a machine body can be performed with a high degree accuracy and at a low cost is provided. In a machine body group of construction machines including at least one representative machine body having an... Hitachi Construction Machinery Co Ltd

Surroundings monitoring device of vehicle

When a to-be-monitored image exists in an image lacking from a bird's-eye image for surroundings monitoring though the to-be-monitored image is imaged by a camera for monitoring, the to-be-monitored image is securely displayed on a display. Cameras 6F, 6B, 6L, 6R are provided in a longitudinal direction and in a... Hitachi Construction Machinery Co Ltd

Construction machine

At the time of starting up an engine (9) using an assist motor generator (10), a main controller (28) lowers a lower limit value in a charge/discharge range of an electricity storage device (19) from a first lower limit value (min1) to a second lower limit value (min2) through an... Hitachi Construction Machinery Co Ltd

Hand operated auxiliary drive and retard torque control

A control system for an off-highway vehicle including a foot operated drive pedal, a foot operated retard pedal, and a hand operated auxiliary drive/retard control. The auxiliary drive/retard control is operable in a first state to signal a request for drive torque and a second state to signal a request... Hitachi Construction Machinery Co Ltd

Drive control system for work machine

A drive control system for a work machine includes: a stabilization control calculation unit (60a) that calculates and outputs a gradual stoppage command and an operation speed limitation command; a stoppage characteristic modification unit (210) that includes a speed increasing unit and corrects a pilot pressure such that, upon a... Hitachi Construction Machinery Co Ltd

Construction machine

A construction machine acquires efficiently and accurately the target surface to be displayed or controlled. The construction machine includes: a design surface information storage unit storing three-dimensional target shape as multiple design surfaces; a work equipment velocity vector acquisition unit detecting or estimating the velocity of work equipment; a work... Hitachi Construction Machinery Co Ltd

Hybrid construction machine

The object of the present invention is to provide a hybrid construction machine that can quickly warm up an electrical storage device and can improve the service life of the electrical storage device. This hybrid construction machine is equipped with: a prime mover (1); an electric motor that supplements the... Hitachi Construction Machinery Co Ltd

Construction machine

The construction machine includes: a control valve that switchingly supplies hydraulic fluid from a hydraulic pump to a hydraulic actuator; a control valve drive device that supplies pilot secondary hydraulic fluid to the control valve in accordance with an operation of an operation lever device; a pilot hydraulic pump that... Hitachi Construction Machinery Co Ltd

Construction machine

A construction machine includes an earth removing implement 20 including: a blade 22 disposed on a base portion frame 21 by using a linkage mechanism 23 and a cylinder 24; a fixed cover 26 positioned above the linkage mechanism 23; a movable cover 27 covering a gap between the fixed... Hitachi Construction Machinery Co Ltd

Oil properties diagnostic system for work machine

A diagnostic system for a work machine includes a data storage device (210) in which sensor information (A) input from a sensor (101A) that senses an oil property of oil used for operation of the work machine and an abnormality degree determination value defined for each kind of the sensor... Hitachi Construction Machinery Co Ltd

Map generation device

The present invention includes: a map information storage unit 18 storing map data 18A representing a travelable area for a dump truck 7; a work machine information accumulation unit 19 accumulating position data 6A and operational data 6B of a hydraulic excavator 6; an operational range arithmetic processing unit 21... Hitachi Construction Machinery Co Ltd

Vehicle exterior moving object detection system

The vehicle exterior moving object detection system includes a surrounding-area image input section for capturing images in areas surrounding its own vehicle and delivering the captured images as surrounding-area images, a combined image constructing section for constructing a combined image including a result output from the detection of a moving... Hitachi Construction Machinery Co Ltd

Surveillance transportation vehicle

An object is to bring an operation to recognize precisely situation of an underneath of a vessel provided at a transportation vehicle and rearward situation on the basis of camera image which is attached to the transportation vehicle. Surveillance system of the transportation vehicle according to the present invention comprises... Hitachi Construction Machinery Co Ltd

Hybrid construction machine

A motor generator (27) is connected mechanically to an engine (21) and a hydraulic pump (23). The hydraulic pump (23) delivers pressurized oil to cylinders (11D) to (11F) in a working mechanism (11), a traveling hydraulic motor (25) and a revolving hydraulic motor (26). The revolving hydraulic motor (26) drives... Hitachi Construction Machinery Co Ltd

Construction machine

A construction machine includes a cooling fan (10) and a shroud (11). The cooling fan (10) sends air drawn in via a radiator (30) to an engine. The shroud (11) is disposed on an outer peripheral side of the cooling fan and forms a passage for air to be drawn... Hitachi Construction Machinery Co Ltd

Hydraulic control system for construction machine

Provided is a hydraulic control system for a construction machine, including: a control valve (31) for controlling supply and discharge of hydraulic fluid to and from an arm cylinder (4); an operation lever (6) for controlling the position of a spool of the control valve (31); a meter-out flow passage... Hitachi Construction Machinery Co Ltd

Hydraulic drive system for work machine

Provided is a hydraulic drive system for a work machine configured with a single solenoid proportional valve for a regeneration circuit, wherein substantially the same actuator speed can be secured irrespective of whether or not hydraulic fluid discharged from a hydraulic actuator is regenerated for driving of another hydraulic actuator.... Hitachi Construction Machinery Co Ltd

Display work machine

A work machine evaluates the fuel consumption for the whole engine running period including the time of operation and the time of non-operation of a work implement and informs an operator of the evaluation in real time to prompt fuel-consumption-savings. The work machine has an engine, a hydraulic pump driven... Hitachi Construction Machinery Co Ltd

Onboard terminal device and traffic control system

A terminal side control device that executes processing for instructing travel of a vehicle to a driver on the basis of a travel permission section assigned thereto by a control server. The terminal-side control device includes: a remaining distance calculation unit that calculates a travel permission remaining distance on the... Hitachi Construction Machinery Co Ltd

Construction machine

A firewall (11) is provided as a partition between an engine room (25) in which an engine (7) and an exhaust gas post-treatment device (10) are arranged and a pump room (26) in which a hydraulic pump (8) is arranged. A rear surface plate (13) of the firewall (11) is... Hitachi Construction Machinery Co Ltd

Hydraulic control system for work machine

A work machine including a specific actuator that supplies hydraulic fluid from a plurality of hydraulic pumps includes: first and second hydraulic pumps communicating with a first hydraulic actuator; a first control valve returning hydraulic fluid delivered by the first hydraulic pump to a tank; and a load detection section... Hitachi Construction Machinery Co Ltd

09/21/17 / #20170269591

Travel control device for work vehicle, and work vehicle

The travel control system includes: a travel zone holding unit configured to hold a travel zone which is set in a particular travel area set beforehand and over which a dump truck is to autonomously travel; a target position setting unit configured to set, on an outer side of the... Hitachi Construction Machinery Co Ltd

09/14/17 / #20170259721

Transportation vehicle

An object is to restrain a hoist shaft and a bushing of a hoist cylinder from abrading. A haulage vehicle with a pivoting vessel has a telescoping hoist cylinder provided between the vessel and the vehicle. Supply of hydraulic oil to the hoist cylinder is controlled by a valve provided... Hitachi Construction Machinery Co Ltd

09/14/17 / #20170259740

Electric drive vehicle

An electric drive vehicle is provided with first and second slider plates contacting a trolley line on the high-voltage side and on the ground side, respectively. A camera has a photographing range of the whole of the second slider plate held in contact with the trolley line on the ground... Hitachi Construction Machinery Co Ltd

09/14/17 / #20170263213

Industrial vehicle management system

An industrial vehicle management system includes: a receiving unit that acquires operational information specifying a position and an operational state of each of a plurality of industrial vehicles; a symbol combining unit that, based on the operational information received by the receiving unit, superimposes and combines upon a map symbols... Hitachi Construction Machinery Co Ltd

09/14/17 / #20170263214

Industrial vehicle management system

An industrial vehicle management system includes: a receiving unit that acquires operational information specifying a position and an operational state of each of a plurality of industrial vehicles; a symbol combining unit that, based on the operational information received by the receiving unit, superimposes and combines upon a map symbols... Hitachi Construction Machinery Co Ltd

08/17/17 / #20170234334

Hydraulic drive system for work machine

To provide a hydraulic drive system for a work machine capable of securing a favorable operability in the case where hydraulic fluid discharged from a hydraulic actuator is regenerated for driving other hydraulic actuator. The hydraulic drive system for a work machine includes: a regeneration line that connects a bottom-side... Hitachi Construction Machinery Co Ltd

08/17/17 / #20170236422

Obstacle avoidance system

On a basis of a relative position of an obstacle 401, a size of the obstacle in an own vehicle 12 width direction and a width of the own vehicle 12, a maximum amount Dt of movement of the own vehicle 12 in the vehicle width direction as required to... Hitachi Construction Machinery Co Ltd

08/10/17 / #20170226715

Hybrid-type working machine

There are provided an electric motor (12) that is driven by an engine (8) to generate electric power or assists in a drive of the engine (8) by supply of electric power thereto, a heat exchanger (13) to which cooling air is supplied by a cooling fan (8A), a heat... Hitachi Construction Machinery Co Ltd

08/10/17 / #20170229019

Obstacle detection system and transportation vehicle

When large vehicles and small vehicles travel together in a mine, they are distinguishedly detected. On a haulage vehicle for a mine, a first obstacle detection device and a second obstacle detection device are disposed. The obstacle detection devices are disposed so that they have detection directions oriented in a... Hitachi Construction Machinery Co Ltd

08/03/17 / #20170218599

Construction machine

An exhaust pipe (7A) in an engine (7) is provided with. an exhaust gas purifying device (10) with a urea selective reduction catalyst (13A) removing nitrogen oxides in an exhaust gas. The exhaust gas purifying device (10) is provided with a urea water injection valve (14) that injects urea water... Hitachi Construction Machinery Co Ltd

06/29/17 / #20170182989

Braking distance control device

A braking distance control device employed for an electrically driven work vehicle includes a safety vehicle speed calculation unit 9 that calculates a safety vehicle speed at which a braking distance provided by use of an electric brake device becomes less than or equal to a threshold value, based on... Hitachi Construction Machinery Co Ltd

06/29/17 / #20170183842

Hydraulic control system for construction machine

A hydraulic control system for a construction machine has a hydraulic actuator that drives an arm, a meter-out channel through which hydraulic fluid discharged from the hydraulic actuator flows, a variable restrictor provided in the meter-out channel, an operating device, and a controller that controls an opening area of the... Hitachi Construction Machinery Co Ltd

06/22/17 / #20170175782

Construction machinery

The Construction machinery includes at least two actuators, a main pump that generates hydraulic energy for driving the actuators, control valves disposed between the main pump and the actuators, a hydraulic pump motor driven by the generator motor that generates energy to be added to the hydraulic energy, and a... Hitachi Construction Machinery Co Ltd

05/25/17 / #20170145658

Hybrid work machine

Provided is a hybrid work machine capable of performing a warm-up operation on an electric storage device by charging and discharging while suppressing the occurrence of lug-down or over-revolution to an engine. The hybrid work machine includes: an engine; an assist motor mechanically connected to the engine, causing a discharge... Hitachi Construction Machinery Co Ltd

05/11/17 / #20170130426

Working machine

Provided is a working machine capable of regenerating and utilizing surplus energy. The working machine related to the present invention is provided with a branching flow path (150) through which hydraulic oil flows between a hydraulic actuator (24) and a hydraulic pump-motor (14), an accumulator (30) arranged in the branching... Hitachi Construction Machinery Co Ltd

03/30/17 / #20170088115

Hybrid working vehicle

An object of the present invention is to provide a hybrid working vehicle that enables enhancing efficiency of an engine. A hybrid control device (35) according to the present invention includes a required power arithmetic unit (35A) that operates power required for operation of the vehicle, specified rotational speed setting... Hitachi Construction Machinery Co Ltd

03/30/17 / #20170089038

Hydraulic drive system for electrically-operated hydraulic work machine

An electrically-operated hydraulic work machine drives an actuator with a hydraulic pump driven by an electric motor and exercises load sensing control by controlling the rotation speed of the electric motor. The useful life of an electrical storage device, which is an electrical power source for the electric motor, is... Hitachi Construction Machinery Co Ltd

03/23/17 / #20170082182

Traveling axle device

As a result, the oil seal (39) can be exposed by removing the front wheel (2) from the wheel mounting part (33B) in the carrier (33). On the other hand, a brake mechanism (40) is disposed on the inner peripheral side of the reduction gear mounting part (18C). Therefore, the... Hitachi Construction Machinery Co Ltd

03/16/17 / #20170072857

Display device for self-propelled industrial machine

The underneath image of a self-propelled industrial machine is displayed with as wide a range as possible on a monitor with cameras that take images around the self-propelled industrial machine in the form of bird's eye view images. A view point conversion section creates the bird's eye view image by... Hitachi Construction Machinery Co Ltd

03/16/17 / #20170073923

Work vehicle

Provided is a work vehicle which is capable of appropriately setting the height of a work tool as a control threshold value for a ride control device or an automatic transmission control device, and which is excellent in operability, travel stability, and work efficiency. A value detected by an angle... Hitachi Construction Machinery Co Ltd

03/16/17 / #20170073931

Work machine

To provide a work machine which, in a configuration provided with a closed-circuit pump and an open-circuit pump, is capable of stabilizing respective pump operations of the closed-circuit pump and the open-circuit pump and of improving the mountability of the closed-circuit pump and the open-circuit pump. The present invention is... Hitachi Construction Machinery Co Ltd

03/16/17 / #20170073932

Hydraulic fluid energy recovery system for work

Provided is a hydraulic fluid energy recovery system for a work machine equipped with a hydraulic pump, a hydraulic actuator for driving the work machine, an operating device for operating the hydraulic actuator, and a regenerating device for recovering a return fluid flowing back from the hydraulic actuator. The hydraulic... Hitachi Construction Machinery Co Ltd

03/16/17 / #20170073937

Fuel device water separation system for industrial machine

A system enables notification of a time for drainage of water from a water separator without adding a new element into the water separator. A hydraulic excavator has a feed line feeding fuel from a fuel tank to an engine, a water separator at a part of the feed line... Hitachi Construction Machinery Co Ltd

03/09/17 / #20170067224

Boom for construction machine

A single different-thickness plate (18) is formed by performing double-side welding from both sides in a plate thickness direction of a first front lower plate (17A) having a plate thickness equal to a plate thickness of a lower joining plate (33F) of an arm-side mounting member (33) and a second... Hitachi Construction Machinery Co Ltd

03/09/17 / #20170067227

Hybrid-type working machine

There are provided an electric motor (12) that is driven by an engine (8) to generate power or assists in a drive of the engine (8) by supply of power thereto, a heat exchanger (13) to which cooling air is supplied by a cooling fan (8A), a heat exchanger upstream... Hitachi Construction Machinery Co Ltd

03/09/17 / #20170068249

Driving assistance system, vehicle, driving assistance terminal device, and driving assistance program

Provided is a technology that, when an unmanned haulage vehicle and a manned haulage vehicle are allowed to exist together and are subjected to fleet operations management, can provide driving assistance to an operator of the manned vehicle by using control data similar to those to be transmitted to the... Hitachi Construction Machinery Co Ltd

03/02/17 / #20170058487

Construction machine

A controller sets a target flow rate of a regenerative hydraulic motor at zero or a low flow rate within an extent in which hydraulic pressure in a regeneration hydraulic line does not become negative pressure when a detected pressure PS detected by a pressure sensor is lower than a... Hitachi Construction Machinery Co Ltd

02/09/17 / #20170037601

Hydraulic drive system for construction machine

An object to achieve favorable operability, in a combined operation that involves a specific actuator and involves a great difference in load pressure and when an operation of an operating unit for the specific actuator is a fine operation, by reducing energy consumption arising from wasted restricting pressure loss of... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170016206

Hybrid-type working machine

An assist generator motor is driven by an engine to generate power or assists in a drive of the engine by supply of power from an electricity storage device. A revolving electric motor is driven by power supplied from the electricity storage device or supplies regeneration power generated by a... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170015322

Haulage vehicle

An autonomous mode controller (61) that outputs an acceleration command (SAa), a braking command (SBa) and a torque command (Ta) is connected to a steering actuator (33) and a traveling drive unit (52). The steering actuator (33) generates combined torque (T1) based upon steering torque (Tm) from a steering handle... Hitachi Construction Machinery Co Ltd

Patent Packs
01/19/17 / #20170016206

Hybrid-type working machine

An assist generator motor is driven by an engine to generate power or assists in a drive of the engine by supply of power from an electricity storage device. A revolving electric motor is driven by power supplied from the electricity storage device or supplies regeneration power generated by a... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170016208

Work machine

To provide a work machine capable of efficiently regenerating the energy owned by hydraulic fluid during a swing deceleration. In the present invention, when a swing deceleration detection section 57a detects the state of a revolving upperstructure 102 being decelerated, when an operation judgment section 57c judges the state that... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170016210

Surroundings display device for swing working machine

To recognize an obstacle such as a working face which may be touched by a revolving upperstructure including a height position thereof at the time of a swing control. A plurality of first cameras 13 for forming bird's eye views which photograph obliquely lower parts of directions different from each... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170017235

Haulage vehicle and travel control system for the same

A haulage vehicle comprises: a position calculating system (220) calculating an estimated position of its own vehicle; a position range calculating unit (201b) calculating a position range which is centered around the estimated position and in which the haulage vehicle is present with a predetermined expected probability; a maximum deviation... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170017239

Management control device

A management control device controls multiple unmanned vehicles, including the overtaking of a vehicle using an opposite lane. First and second travel permission sections are set for an own vehicle and another vehicle in a stopped state located ahead of the own vehicle on a traveling lane. A path by... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170018070

Surroundings monitoring system for working machine

A surroundings monitoring system for a working machine prevents its own vehicle shadow from having an influence on the detection of an object existing around the working machine. The surroundings monitoring system for a working machine includes: a monocular camera picks up an image of the surroundings of the working... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170018188

Road shoulder-detecting system and transportation vehicle for mining

To provide a road shoulder-detecting system which can accurately measure the orientation of a vehicle relative to a road shoulder and the distance to the road shoulder. The present invention includes road shoulder-detecting units 2a, 2b to scan a road surface A in front of a vehicle 1 in the... Hitachi Construction Machinery Co Ltd

01/19/17 / #20170018190

Wireless system and operation management server

A wireless system for a mine performs a management of the quality of wireless communication at each point in the mine at a time point closer to a current time while maintaining the operating state of each dump truck. The wireless system is provided with a server, wireless base stations... Hitachi Construction Machinery Co Ltd

01/12/17 / #20170009427

Control device of construction machine

A control device of construction machine that performs tasks by driving a hydraulic pump by means of an electric motor that is driven by electric power of a battery device that is capable to charge and discharge and an engine that is mechanically coupled to the electric motor, includes: a... Hitachi Construction Machinery Co Ltd

01/12/17 / #20170009428

Hydraulic fluid energy regeneration device for work machine

Provided is a hydraulic fluid energy regeneration device for a work machine, including: a regeneration hydraulic motor driven by discharged return hydraulic fluid; a first hydraulic pump mechanically connected to the regeneration hydraulic motor; a second hydraulic pump that delivers an hydraulic fluid for driving a first hydraulic actuator and/or... Hitachi Construction Machinery Co Ltd

01/12/17 / #20170009690

Working machine and working machine monitoring system

An object of the present invention is to provide a working machine and a working machine monitoring system using the same which is capable of improving the accuracy in determining fuel property. The working machine is provided with an engine operation parameter acquisition module (1041) that acquires an engine operation... Hitachi Construction Machinery Co Ltd

01/05/17 / #20170001539

Electric driving wheel type work vehicle

An electric driving wheel type work vehicle has a traveling motor, an inverter for supplying the motor with three-phase power converted from DC power, a pre-driver circuit for supplying a gate signal to the inverter on the basis of an input PWM signal, a controller for outputting to the pre-driver... Hitachi Construction Machinery Co Ltd

01/05/17 / #20170002545

Hydraulic system for work machine

When option attachment has not been attached, a reserve flow/direction control valve 8 is made to operate as a center bypass cut valve. When an option attachment has been attached, switching control is performed. In the switching control, when the option attachment is not used, the reserve flow/direction control valve... Hitachi Construction Machinery Co Ltd








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