Abstract: An excavator includes a frame, and a platform on top of the frame. A hydraulic distribution system is received on top of the frame but below the platform. A pilot valve unit is at least partly received on top of the platform. The platform includes a dedicated hole capable of receiving therethrough at least that part of the pilot valve unit which is received on top of the platform. The pilot valve unit is fixed, directly or indirectly, on the platform. The pilot valve unit can be mounted from below the platform, through the dedicated hole, and is fixed on the platform from above the platform.

Abstract: A vehicle includes an engine and a liquid pump configured to pump liquid from a liquid intake system to an outlet. The vehicle further includes a pressure control system operably coupled to the engine via a communication connection, the pressure control system receiving a first signal from the engine representing engine speed. The pressure control system is configured to cause the liquid pump to change pumping pressure without changing the engine speed, and wherein the pressure control system is configured to cause the liquid pump to change pumping pressure without changing the engine speed when the pressure control system makes a determination relating to the engine speed.

Abstract: A mobile machine, a braking system of a mobile machine and a method of controlling a mobile machine. The mobile machine (1) comprises a movable carrier (3) and several wheels (4). The mobile machine is driven (D) on a work site by means of a hydrostatic drive system. The machine is stopped by means of operating brakes. Driving and stationary state of the machine are detected by means of sensing devices (14, 15, 21, 23a, 23b, 24). When the machine is stationary, parking brake devices (28) are activated automatically.

Abstract: A hydrostatic traction drive includes a pressure medium source configured to drive four hydromotors connected as pairs in series, the pairs arranged parallel to each other. In a respective pressure medium flow path between the hydromotors of a series, a pressure medium volume flow is extracted which is diverted via a respective valve device to a pressure medium sink to bypass the respective downstream hydromotor. The hydrostatic traction drive also includes a control valve configured to balance the pressure on pressure differences between the pressure medium flow paths, in particular on a steering movement of an articulated steering. The control valve is configured to connect the pressure medium flow paths together hydraulically.

Abstract: An engine (10) electronically controlled by a control device (33), a hydraulic motor (24) for traveling which is driven by a pressurized oil delivered from a hydraulic pump (13), and a traveling speed switching member (29) which switches a traveling speed by the hydraulic motor (24) at least in two stages of a low speed and a high speed. The control device (33) includes an output lowering determination unit for determining whether or not a fuel injection amount to be supplied to the engine (10) is limited and an engine output is in a lowered state and a low-speed control unit in which, when the engine (10) output is in a lowered state, a traveling speed is controlled to a low speed state kept lower than a high speed even if the traveling speed switching member (29) has been switched to the high speed side.

Abstract: The present invention combines the principles of a gas turbine engine with an electric transmission system. A method and apparatus are disclosed for utilizing metallic and ceramic elements to store heat energy derived from a regenerative braking system. The subject invention uses this regenerated electrical energy to provide additional energy storage over conventional electrical storage methods suitable for a gas turbine engine. The subject invention provides engine braking for a gas turbine engine as well as reducing fuel consumption.

Abstract: A working vehicle includes an engine, a hydraulic pump, a first hydraulic motor, a vehicle speed detecting unit, a parking brake, a parking brake operating member and a control unit. The control unit is configured to determine whether the vehicle speed is equal to or greater than a predetermined threshold when the parking brake operating member is operated. The control unit is configured to execute a brake control that decreases a displacement of the first hydraulic pump and increases a displacement of the first hydraulic motor without activating the parking brake when the vehicle speed is equal to or greater than the predetermined threshold in a state when the vehicle is traveling, and to activate the parking brake when the vehicle speed falls below the predetermined threshold.

Abstract: A wheel loader (1) has a tire (5). The wheel loader (1) includes a hydraulic pump (11), a hydraulic oil tank (7) disposed at a position higher than the hydraulic pump (11) and connected to the hydraulic pump (11), a check valve (12) disposed at a position lower than the hydraulic oil tank (7) and connected to the hydraulic oil tank (7), a filter (13) disposed at a position lower than an upper surface (US) of the tire (5) in a side view and connected to the check valve (12), and a pipe (14) extending to a first position (H1) lower than the check valve (12) and further extending from the first position (H1) to a second position (H2) as a higher position than the check value (12) is set as the second position (H2), and connected to the filter (13) at the second position (H2). Accordingly, it is possible to provide a work vehicle capable of inhibiting a hydraulic oil from spilling out in exchanging the filter (13).

Abstract: Provided is a hybrid construction machine capable of facilitating the hybridization (conversion, redesigning, etc. into a hybrid construction machine) even for construction machines of the minimal tail swing radius type or the minimal swing radius type. A hybrid mini-shovel of the minimal tail swing radius type comprises an engine, a hydraulic pump whose input shaft is coaxially connected to the output shaft of the engine, a generator/motor whose rotating shaft is connected to the output shaft of the engine and the input shaft of the hydraulic pump via a gear mechanism, and a battery which receives and supplies electric power from/to the generator/motor. The generator/motor is placed at a vertical position where its lower end is situated above the shaft center of the input shaft of the hydraulic pump, and when viewed from above at a horizontal position where it overlaps with the hydraulic pump.

Abstract: A vehicle body frame of a bulldozer has a left side frame, a right side frame, a base plate, and a cross member. The left and right side frames each extend in the front and back direction. The base plate spans across between the left and right side frames. The cross member is positioned between a hydraulic pump and left and right hydraulic motors. The cross member protrudes upward from the base plate. The cross member spans across between the left and right side frames. The cross member has a left conduit hole and a right conduit hole which are spaced apart in a left and right direction of the bulldozer. The first and second left hydraulic fluid tubes pass through the left conduit hole. The first and second right hydraulic fluid tubes pass through the right conduit hole.

Abstract: A hydraulic hybrid vehicle includes elements such as a hydraulic pump driven by an internal combustion engine and arranged to draw in low pressure fluid and pump the fluid at high pressure to an accumulator. A hydraulic motor is powered by the pressurized fluid. Safety processes are provided for detecting and addressing a number of conditions that may arise in the operation of the hydraulic hybrid vehicle, including an initialization procedure for start-up of the vehicle, a shut-down procedure, and procedures for detecting and responding to failure of the pump or motor, internal and external fluid leaks, and non-responsive actuation and mode control systems.

Abstract: A traction force control section of a wheel loader reduces maximum traction force to below the maximum traction force with traction force control in an off state when the traction force control is in an on state. The traction force control section increases the maximum traction force when determination conditions are satisfied with the traction force control in the on state. The determination conditions include that the work situation is digging, that the operation amount of the acceleration operation member is the predetermined operation threshold or more, and that a boom angle is the predetermined angle threshold or more.

Abstract: A system and method for controlling automatic stop-start of a motor vehicle is provided. The system and method is configured to enable an automatic stop-start mode of operation based on vehicle conditions. In addition, the system and method is configured to selectively actuate an accumulator to prime the transmission for a smooth restart.

Abstract: The present invention generally relates to hybrid power systems for vehicles. In one embodiment, the present invention relates to hybrid power systems for various types of transportation vehicles where the hybrid power systems is partially, or even totally, based on the use of at least one hydraulic system to provide supplemental, or even the primary, motion power for a hybrid vehicle. In another embodiment, the hybrid power systems of the present invention are capable of providing both motion power as well as cabin comfort heating and/or cooling.

Abstract: A wheel hub assembly for use in powered lawn equipment is disclosed. The wheel hub assembly has a receiving member which is coupled to an intermediate shaft having an intermediate gear. The intermediate gear is coupled to an output shaft having an output gear. The output shaft is connected to an output hub; the intermediate shaft gear meshes with the output gear such that when the receiving pulley is rotated in one direction, the output hub rotates in the opposite direction.

Abstract: A method for commissioning a hybrid vehicle includes providing a vehicle having a chassis, a first power source disposed on the chassis and a second power source disposed on the chassis. The first power source includes a prime mover and a transmission. The prime mover is selectively engaged to a driveline of the vehicle. The second power source includes a pump/motor assembly, a fluid reservoir in fluid communication with the pump/motor assembly and an energy storage unit in fluid communication with the pump/motor assembly. A neutral position of the pump/motor assembly is determined. The pump/motor assembly of the second power source is coupled to the prime mover of the first power source during pumping mode of the pump/motor assembly. Gas is purged from the second power source by routing fluid from the energy storage unit to the fluid reservoir.

Abstract: A system and method for operating a large single engine sweeper includes a transfer case assembly inserted into the chassis drive train of the vehicle on which a package of sweeping equipment is mounted. In road mode operation, power from the chassis engine passes through a chassis automatic transmission, through a transfer case assembly to the differential and real wheel assembly. In sweep mode, power passes from a propel hydraulic motor into the transfer case assembly and then to the differential and real wheel assembly.

Abstract: In order to decrease the number of handling components of a parking brake unit without increasing a length of a wheel base, there is provided a forklift including a main input shaft which is rotationally driven by a hydraulic motor, a differential input shaft which rotates by the rotation of the main input shaft, and a differential mechanism which is provided between the differential input shaft and a front axle, the forklift being configured to run by transmitting power of the hydraulic motor to the front axle through the main input shaft, the differential input shaft, and the differential mechanism, wherein an idle shaft is disposed so as to be parallel to the differential input shaft, a power transmission mechanism obtained by meshing gears and is interposed between the differential input shaft and the idle shaft, and then a parking brake unit is provided in the idle shaft.

Abstract: A system and method for controlling engine revolutions for a hybrid construction machine is provided.

Abstract: A working vehicle includes an engine, a hydraulic pump, a first hydraulic motor, a vehicle speed detecting unit, a parking brake, a parking brake operating member and a control unit. The control unit is configured to determine whether the vehicle speed is equal to or greater than a predetermined threshold when the parking brake operating member is operated. The control unit is configured to execute a brake control that decreases a displacement of the first hydraulic pump and increases a displacement of the first hydraulic motor without activating the parking brake when the vehicle speed is equal to or greater than the redetermined threshold in a state when the vehicle is traveling, and to activate parking brake when the vehicle speed falls below the predetermined threshold.

Abstract: A rollback prevention system is disclosed for use with a mobile machine. The rollback prevention system may have an input device configured to receive an input indicative of a desired travel direction, a travel sensor configured to generate a signal indicative of an actual travel direction, and a brake sensor configured to generate a signal indicative of a brake activation status. The rollback prevention system may also have a controller configured to make a determination that the actual travel direction of the mobile machine is opposite the desired travel direction, and to selectively increase a torque output of the transmission to a first level based on the determination. The controller may also be configured to reduce the torque output below the first level when the signal indicates brake activation, and to return the torque output to the first level when the signal indicates brake deactivation.

Abstract: An embodiment of a road vehicle with hybrid propulsion including: at least one pair of driving wheels; a thermal internal combustion engine; a double clutch gearbox provided with two primary shafts, two clutches interposed between the thermal internal combustion engine and the primary shafts, at least a secondary shaft constantly meshing with the driving wheels, and a plurality of pairs of gears, each of them defining a respective speed and comprising a primary gear mounted to a primary shaft and a secondary gear which is mounted to the secondary shaft and constantly meshes with the primary gear; a first reversible electric machine having a shaft, which is connected to a first primary shaft of the gearbox; and a second reversible electric machine having a shaft, which is mechanically connected to a second primary shaft of the gearbox different from the first primary shaft.

Abstract: A drivable caster wheel assembly comprises a support socket defining a journal, a support frame with a post with a portion thereof positioned in the journal and being rotatable in the journal of the support socket about a substantially vertical axis. The support frame may include an arm mounted on the post. An axle is mounted on the arm. A wheel is mounted on the axle and is rotatable about a substantially horizontal axis. A hydraulic motor is mounted on the support frame and configured to rotate the wheel with respect to the support frame. A fluid transfer structure is configured to transfer fluid from a fluid power source on the mobile base when the support socket is mounted on the mobile base to the motor for driving the wheel while maintaining an ability of the support frame and wheel to rotate about the substantially vertical axis.

Abstract: The present invention combines the principles of a gas turbine engine with an electric transmission system. A method and apparatus are disclosed for utilizing metallic and ceramic elements to store heat energy derived from a regenerative braking system. The subject invention uses this regenerated electrical energy to provide additional energy storage over conventional electrical storage methods suitable for a gas turbine engine. The subject invention provides engine braking for a gas turbine engine as well as reducing fuel consumption.

Abstract: A prime mover rotation speed control system for hydraulically driven vehicle includes: a hydraulic pump driven by a prime mover; a hydraulic motor for traveling driven with pressure oil supplied from the hydraulic pump; an operation member that outputs a travel command in accordance with an amount of operation by the operation member; a flow control device that controls one of a flow of the pressure oil from the hydraulic pump to the hydraulic motor and a flow rate of the pressure oil discharged from the hydraulic motor, based on the travel command that is output in accordance with the amount of operation by the operation member; a target rotation number outputting device that outputs a target rotation number of the prime mover based on a command; a rotation number control device that controls a rotation number of the prime mover to be the target rotation number; a vehicle speed detection device that detects a vehicle speed; and a vehicle speed calculation device that calculates a target vehicle speed in acco

Abstract: A hydraulic energy recovery and a mechanical drive system in one unit that also provides integral mounting of hydraulic pump/motors for primary drive, secondary drive, and pumps for cooling, lubrication, and low pressure systems along with a mounting position for a power take-off device.

Abstract: A compressed air engine comprises a housing and an impeller body fixed on a primary power output shaft and located within the housing. An ejecting inlet ejects air to the impeller body in the housing. Working chambers are provided on the impeller body. The inner surface of the housing closes the working chambers so that the compressed air ejected to the working chambers pushes the impeller body to rotate and is temporarily stored in the working chamber, and an ejecting outlet is provided on the housing so that the compressed air temporarily stored in the working chamber expands outwards when the compressed air is rotated to the gas ejecting outlet and do work to further push the impeller body to rotate.

Abstract: This invention relates to a machine, in particular a construction machine and preferably a wheel loader or dumper, comprising a pump, an energy accumulator connected with the pump, which includes a first space which is gas-filled and which includes a second space which is designed such that in operation of the pump it is filled by a fluid delivered by means of the pump, wherein the gas contained in the first space is compressed, and comprising a hydraulic motor to be driven by means of the energy accumulator, wherein the energy accumulator is designed such that the ratio of the volume of the first space with fully loaded second space to the volume of the first space with non-loaded second space is >0.5.

Abstract: A control device of a forklift engine that secures operability by keeping down fuel consumption when the accelerator pedal is floored in an unloaded or lightly loaded state, and once a heavy cargo is loaded, by lifting the cargo at a maximum lifting speed and traveling with maximum travel performance without acceleration problems. At least two maximum torque curves of different magnitudes are set in advance on a torque curve diagram. Then, the weight the cargo loaded on an attachment is measured. A threshold value for selecting at least two maximum torque curves is determined. If the measured weight is less than the threshold value, the maximum torque curve with a smaller maximum torque value is selected. If the measured weight is not less than the threshold value, the maximum torque curve with a larger maximum torque value is selected. The engine is controlled using the selected maximum torque curve.

Abstract: In a work vehicle, a cutoff-pressure-setting part sets cutoff pressure at a predetermined first pressure value when vehicle speed is greater than a predetermined first speed threshold, and at a second pressure value greater than the first pressure value when vehicle speed is equal to or less than a second speed threshold less than the first speed threshold. When the vehicle is moving forward and the forward/backward switch lever is in forward motion position, or when the vehicle is moving backward and the forward/backward switch lever is in backward motion position, the second speed threshold is set to a predetermined first value. When the vehicle is moving forward and the forward/backward switch lever is in backward motion position or when the vehicle is moving backward and the forward/backward switch lever is in forward motion position, the second speed threshold is set to a second value lower than the first value.

Abstract: A rotational speed pickup 71 (traveling speed detection means), a hydraulic pressure sensor 72 (traveling operation detection means), a hydraulic pressure sensor 73 (drive status detection means), and a voltage sensor 74 (transmission shift position detection means) detect parameters regarding the traveling state of a hydraulic traveling vehicle. A control unit 80, a solenoid proportional valve 81, an engine control system 82, and a motor regulator 33 determine the operating state of the hydraulic traveling vehicle based on the parameters regarding the traveling state, and control the equivalent displacement of the traveling system including a hydraulic traveling motor 14 and the maximum flow rate supplied to the hydraulic traveling motor 14 according to the result of determination. The pump flow rate and motor displacement are controlled according to the traveling state in this way, thereby ensuring favorable traveling performance without degrading the fuel efficiency.

Abstract: A construction vehicle includes a hydraulic pump for travelling driven by an engine and a hydraulic motor for travelling driven by a pressurized oil discharged from the hydraulic pump. A control unit is configured to set an upper limit of a command value of an acceleration opening degree in accordance with a magnitude of a travelling load and a magnitude of a vehicle speed, and to set a lower limit of a displacement of the hydraulic motor for travelling in order to maximize the vehicle speed at the acceleration opening degree limited to a predetermined amount.

Abstract: In the work vehicle, a controller is configured to control a motor displacement control part via feedback control so that the driving hydraulic pressure detected by a driving hydraulic pressure detector approaches a predetermined target driving hydraulic pressure. The controller is configured to perform low temperature motor displacement limitation control, which reduces the maximum displacement of a hydraulic motor, when the temperature of the hydraulic fluid detected by the fluid temperature detector is lower than a predetermined temperature.

Abstract: In a frame structure of a vehicle that includes a flywheel housing, an intermediate housing and a transmission case that are connected to each other along a longitudinal axis of the vehicle to constitute a vehicle frame, the intermediate housing has a hollow shape with a first end and a second end located along the longitudinal axis of the vehicle, the first end having an abutting surface against which the second end of the flywheel housing abuts, a support surface located radially inwardly of the abutting surface so as to support the forward/rearward movement switching unit, and an opening surrounded by the support surface, the opening serving as a first-end opening of the intermediate housing along the longitudinal axis of the vehicle. The abutting surface and the support surface along the longitudinal axis of the vehicle are located so that at least a portion of the forward/rearward movement switching unit is accommodated within the flywheel housing.

Abstract: A wheel end assembly comprises a wheel hub support housing and a wheel hub drive assembly rotatably connected to the wheel hub support housing. The wheel end assembly also includes a hydraulic motor operatively coupled to the wheel hub drive assembly, the hydraulic motor being disposed to deliver a torque to the wheel hub drive assembly. The wheel end assembly further includes a pump, fluidly coupled to the wheel hub drive assembly and the hydraulic motor, the pump being disposed to provide a flow of hydraulic fluid to the wheel hub drive assembly.

Abstract: A hydraulic implement system for a machine is disclosed. The hydraulic implement system may have a boom member, a boom actuator, and a boom operator control device movable to indicate a related operator desired boom member velocity. The hydraulic implement system may also have an implement pivotally connected to the boom member, an implement actuator, and an implement operator control device movable to indicated a related operator desired implement velocity. The range of the implement operator control device may be divided into a first portion and a second portion. The hydraulic implement system may also have a controller configured to selectively limit a velocity of the implement during manipulation of the implement operator control device within the first portion such that a lift velocity of the boom member of at least 65% of the desired boom member velocity is always possible.

Abstract: A hydraulic transaxle has an axle casing and a pair of hydraulic motors disposed in the axle casing. The hydraulic motors have respective motor shafts and respective moveable swash plates. An axis of tilt of each moveable swash plate is offset with respect to a longitudinal axis of the respective motor shaft, and the moveable swash plates are operatively engaged to a steering operation device.

Abstract: A ureal water tank (28), a storage of an aqueous urea solution, is located within a utility room (6G) in a right front section of a revolving frame (6), which is readily accessible from outside. In this instance, among a plurality of operating oil conduits (18), a working mechanism operating conduit (21) which supplies operating oil to a boom cylinder (5D) of a working mechanism (5) is arranged to run along exterior surfaces of the ureal water tank (28). Therefore, even if the ureal water tank (28) is located in a place with no heat source, the aqueous urea solution in the ureal water tank (28) can be stably kept in a heated state by utilization of heat of operating oil in circulation through the working mechanism operating conduit (21).

Abstract: A drive train for a work vehicle comprises: an engine mounted to a vehicle body such that an output shaft of the engine extends in a lateral direction of the vehicle body; a hydrostatic transmission having a pump shaft, a motor shaft, and a housing, the hydrostatic transmission being mounted to the vehicle body such that the pump shaft and the motor shaft extend in the lateral direction; a mechanical transmission having a plurality of transmission shafts each of which extends in the lateral direction. A pump side portion of the housing of the hydrostatic transmission is connected to an end plate of the engine and a motor side portion of the housing is connected to a casing of the mechanical transmission so that the housing extends from the engine to the mechanical transmission.

Abstract: A control system (100) for traction transmission has at least two multi capacity motors (M1, M2), which are adapted to rotate a vehicle's wheels (J1, J2) and which multi capacity motor (M1) is arranged to rotate a traction wheel (J2), and the multi capacity motor (M2) is arranged to rotate another traction wheel (J1), whereby motor parts (M1a and M2a) of partial rotational volumes of the multi capacity motors (M1, M2) can be connected in series, whereby the anti-slip is on.

Abstract: A wheel type work machine having improved ease of assembly and a compact-sized traveling system power transmission mechanism. The wheeled work machine comprises a traveling body (2) having an engine (7) mounted at the rear of a machine frame (6) supported by front and rear wheels (4, 5) and the traveling system power transmission mechanism (8) for transmitting power from the engine (7) to the rear wheels (5). The traveling system power transmission mechanism (8) comprises a rear wheel differential device (38) disposed on the front side of the engine (7), a hydrostatic transmission (35) disposed on the front side and the rear wheel differential device and receiving the power from the engine (7), and a mechanical transmission device (37) disposed between the hydrostatic transmission (35) and the rear wheel differential device (38) and transmitting the power from the hydrostatic transmission (35) to the rear wheel differential device (38).

Abstract: A vehicle includes an internal combustion engine configured to power a hydraulic pump to pressurize hydraulic fluid, which is used to power the vehicle directly or is stored in an accumulator. A drive module, including a hydraulic pump/motor and a multi-speed mechanical transmission, is operatively coupled to drive wheels of the vehicle to provide motive power to the vehicle. The drive module can also include a second hydraulic motor (or multiple hydraulic motors) configured to provide motive power. The transmission is configured to progress through its gears at ratio shifts of no less than 2:1 between adjacent gear positions. The transmission is configured to place the hydraulic motor in neutral during some portions of vehicle operation, and to engage the motor during other portions of vehicle operation.

Abstract: There is provided a wheel motor device including a hydraulic motor unit. The hydraulic motor unit includes a hydraulic motor main body, a motor shaft, a motor case and a port block. The port block includes a motor surface to which the motor case is connected, a pump surface to which a pump case surrounding a hydraulic pump main body is detachably connected so as to form a pump space for accommodating the hydraulic pump main body, and a pair of operational fluid passages fluidly connecting between the hydraulic motor main body accommodated in the motor space in a state of being contacted with the motor surface in a sliding manner around its axis line and the hydraulic pump main body accommodated in the pump space in a state of being contacted with the pump surface in a sliding manner around its axis line.

Abstract: A hydraulic hybrid vehicle includes elements such as a hydraulic pump driven by an internal combustion engine and arranged to draw in low pressure fluid and pump the fluid at high pressure to an accumulator. A hydraulic motor is powered by the pressurized fluid. Safety processes are provided for detecting and addressing a number of conditions that may arise in the operation of the hydraulic hybrid vehicle, including an initialization procedure for start-up of the vehicle, a shut-down procedure, and procedures for detecting and responding to failure of the pump or motor, internal and external fluid leaks, and non-responsive actuation and mode control systems.

Abstract: A hydraulically driven vehicle comprises: a first transaxle disposed at one of front and rear portions of the vehicle, wherein the first transaxle incorporates a first hydraulic motor for driving a first axle; a second transaxle disposed at the other of the rear or front portion of the vehicle, wherein the second transaxle incorporates a second hydraulic motor for driving a second axle; a hydraulic pump for supplying fluid to the first and second hydraulic motors; a mower; a duct for transferring grass mowed by the mower, wherein the first transaxle is disposed above the duct; and a vertical power train interposed between the first axle and an axial center shaft of a wheel driven by the first axle, wherein the power train is disposed on a lateral outside of the duct.

Abstract: A vehicle having an auxiliary power system for supplying power to an implement is disclosed. The power system includes a power enablement device having an enablement component that allows or prevents supplying power to the implement, and an auxiliary actuator operably coupled to the power enablement device. The auxiliary actuator can be manipulated between a first, de-actuated position and a second, actuated position. An operator actuable continuous actuation device is moveable between engaged and disengaged positions, providing an actuation signal indicative of its position. A continuous enablement actuator is capable of engaging the enablement component when the enablement component is in the actuated position to discourage the enablement component from moving to the de-actuated position.

Abstract: Method and apparatus for a propulsion system for a vehicle or the like having a two part turbine system comprising a main turbine portion for driving the vehicle drive train and a smaller, accessory turbine system to provide auxiliary power for other components of the engine and vehicle. The turbines are both liquid driven by having a two-stage pressure system wherein the first stage raises the pressure to approximately 50 psi and the second stage system raises the pressure to approximately 3,000 to 5500 psi which pressurized fluid is then sprayed or injected onto the blades of a turbine so as to make the turbines rotate about a central drive axle. The fluid chosen as the hydraulic fluid of the present invention is extended life antifreeze.

Abstract: A wheel loader (50) is designed so that when a specific first condition is met for vehicle speed, accelerator opening, engine speed, and HST pressure, the engine absorption torque curve of an HST pump (4) is switched to shift the matching point from the low-engine speed side to the high-engine speed side. On the other hand, if a second condition is met for vehicle speed and HST pressure, control is performed so that the absorption torque curve of the HST pump (4) is returned from the high-engine speed side to the low-engine speed side.

Abstract: A construction vehicle includes a hydraulic pump for travelling driven by an engine and a hydraulic motor for travelling driven by a pressurized oil discharged from the hydraulic pump. A control unit is configured to set an upper limit of a command value of an acceleration opening degree in accordance with a magnitude of a travelling load and a magnitude of a vehicle speed, and to set a lower limit of a displacement of the hydraulic motor for travelling in order to maximize the vehicle speed at the acceleration opening degree limited to a predetermined amount.

Abstract: A hydraulic control apparatus for an automatic transmission includes a forward travel engaging element, a reverse travel engaging element, a first signal electromagnetic valve, a first switching valve, and a second switching valve. The hydraulic control apparatus is structured so as to change the output state of the signal pressure of the first signal electromagnetic valve when changing from the reverse travel shift position and/or shift range to the non-travel shift position and/or shift range and when changing from the forward travel shift position and/or shift range to the non-travel shift position and/or shift range, and to enable quick draining of hydraulic pressure of the hydraulic servo of the reverse travel engaging element and hydraulic pressure of the hydraulic servo of the forward travel engaging element.