A driving-force distribution device is provided that can supply lubricant to an above-positioned pinion gear among a pair of pinion gears even when rotation of a differential case of a differential mechanism stops in a two-wheel-drive mode of a four-wheel-drive vehicle. A driving-force distribution device mounted on a four-wheel-drive vehicle includes a differential mechanism and a clutch mechanism. The differential mechanism includes a differential case, a pinion shaft, a pair of pinion gears, and a pair of side gears. In the pinion shaft, a flow passage is formed through which a lubricant is allowed to flow from the below-positioned pinion gear among the pair of pinion gears toward the above-positioned pinion gear in the two-wheel-drive mode in which the pair of pinion gears rotate in opposite directions with the differential case not rotating. The lubricant is supplied to the flow passage by rotation of the below-positioned pinion gear.

A control apparatus for a four-wheel drive vehicle includes a current detector configured to output a detection signal in accordance with the magnitude of an actual control current, a target current value calculator configured to calculate a target current value that is a target value of the control current, and a current controller configured to control a current output circuit to output the control current having the target current value calculated by the target current value calculator based on a result of detection performed by the current detector. When the four-wheel drive vehicle is in a two-wheel drive mode in which first and second friction clutches are released, the current controller performs zero-point adjustment for adjusting a zero point of the control current to be output from the current output circuit.

A motorized module for goods transport has a loading platform; at least a first and at least a second axle each provided with at least one respective rolling body on the ground, a respective mechanical speed reducer, a respective releasable angular connection joint interposed between a respective hydraulic motor for driving the axle and the respective rolling body, and an electronic unit for controlling the hydraulic motors and the angular connection joints as a function of the advancement speed of the module and being activated in succession as the advancement speed of the module itself varies.

A differential arrangement including a wedge clutch assembly is provided. The wedge clutch assembly includes a cage with a first plurality of tapered crossbars to at least partially define a plurality of tapered wedge pockets. A plurality of wedges are each arranged within a respective one of the plurality of wedge pockets and within a circumferential groove of an input drive gear or a differential assembly. An actuator assembly is configured to move the cage in at least one of a first axial direction or a second axial direction. Movement of the first plurality of tapered crossbars in one of the first axial direction or the second axial direction circumferentially drives the plurality of wedges into contact with the circumferential groove such that the input drive gear drives the differential assembly.

In a four-wheel-drive vehicle, a hydraulic unit has an electric motor, to which a motor current is supplied from a control device, and a pump that is actuated by rotation of a motor shaft, and a drive force transfer device has a piston that is moved by the pressure of working oil discharged from the pump, and a friction clutch that is switchable between a transfer state and a blocked state, in which transfer of a drive force to rear wheels is allowed and blocked, respectively, in accordance with movement of the piston. The control device detects the presence or absence of an abnormality of a flow passage forming member, which forms a flow passage for working oil, in accordance with at least any of a motor current and the number of revolutions of a motor shaft at the time when the motor shaft is rotated by applying a voltage to the electric motor.

The present invention relates to a hydrostatic transmission system comprising: at least one pump (110), at least two wheel motors (120, 122; 140, 142) supplied by the pump (110) for the mechanization of a machine, characterized by the fact that it comprises means (130) designed to offset in time a change of displacement of the motors (120, 122; 140, 142) into several groups so as to have a progressive evolution of the apparent displacement of the motors.

A computer system comprising processing circuitry configured to handle wheel slip a vehicle is provided. The vehicle comprises a first axle. The first axle comprises at least two wheels. Each of the at least two wheels of the first axle is drivable by at least two hydraulic motors. The processing circuitry is configured to obtain a slip condition of the vehicle. The processing circuitry is configured to, based on the obtained slip condition, trigger an adjustment of pressure and/or flow to be supplied to at least one of the at least two hydraulic motors in the vehicle. Triggering the adjustment comprises triggering an adjustment of pressure and/or flow between at least two hydraulic motors, and/or triggering adjustment of pressure and/or flow supplied by a source.

A four-wheel drive vehicle includes a dog clutch that selectively interrupts transmission of a drive force to a propeller shaft, first and second multi-plate clutches that selectively interrupt transmission of the drive force from the propeller shaft to left and right rear wheels, first and second pistons that press the first and second multi-plate clutches, and a hydraulic circuit that supplies hydraulic oil to first and second cylinder chambers. During a transition to a four-wheel drive mode, torque transmitted through the first multi-plate clutch increases the speed of rotation of the propeller shaft so as to engage the dog clutch, and the second multi-plate clutch is kept from transmitting torque to the propeller shaft.

An all-wheel drive vehicle driveline can include an input member, differential, pump, first clutch, valve, and second clutch. The differential can include a case member, differential gearset, first output, and second output. The differential gearset can receive input torque from the case member and output differential torque to the first and second outputs. The pump can pump a fluid to a first conduit. The first clutch can transmit torque between the input and case members when a pressure in the first conduit exceeds a first predetermined pressure. The valve can couple the first conduit to a second conduit. The second clutch can couple the case member to the first output for common rotation when a pressure in the second conduit exceeds a second predetermined pressure. The valve can selectively permit fluid communication from the first conduit to the second conduit.

A differential assembly is disclosed, including a housing forming an interior space, and a shaft may extend into a portion of the interior space of the housing. A side gear including an aperture may be arranged within the interior space and an end portion of the shaft is aligned and extends through the aperture. The differential assembly may further include a sliding sleeve configured with a flat flange portion, the sliding sleeve may extend through the aperture and slide over the end portion of the shaft. Furthermore, a pinion gear may be configured with a flat face portion and a pinion gear cam portion may be configured to extend axially away from the flat face portion of the pinion gear. An actuator may actuate the sliding sleeve between a sleeve first position and a sleeve second position and the flat flange portion may interact with the pinion gear cam portion.