摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A final drive for a road vehicle comprises a pinion gear (10) on a pinion axle (4), the pinion gear being in gear engagement with a crown gear (12) journaled for rotation transversely to the pinion axle (4). It is combined with an all wheel drive (A WD) coupling, comprising a disc package (2) axially controlled by a hydraulic piston (5) for optionally transmitting torque from an ingoing axle (3) to the pinion axle (4) as well as a disc drum (2A) or similar means for rotatably connecting the disc package (2) to the pinion axle. An axial stop (9, 9′) is arranged on the pinion axle (4) for transferring axial forces from the disc drum (2A) to the pinion axle.
摘要:
A torque transfer mechanism for controlling the magnitude of a clutch engagement force exerted on a clutch pack that is operably disposed between a first rotary member and a second rotary member includes a hydraulic clutch actuation system. The hydraulic clutch actuation system includes a primary fluid circuit coupled to a secondary fluid circuit by a pressure intensifier. The pressure intensifier provides magnified pressure to a piston for actuating the clutch pack.
摘要:
A device is provided which performs highly-accurate control in low-torque regions while taking advantage of hydraulic pressure sealed-type hydraulic control devices. The device includes: a first characteristic (sealed pressurization) obtained by closing the on/off valve and driving an oil pump: a second characteristic (sealed depressurization) obtained by disabling drive of the oil pump and opening the on/off valve; and a third characteristic (flow-rate control) obtained by opening the on/off valve and driving the oil pump. In the process of supplying hydraulic pressure to a piston chamber in a low torque region, the device performs control according to the third characteristic. In the process of pressurizing the piston chamber in a torque region higher than the low torque region, the device performs control according to the first characteristic. In the subsequent process of depressurizing the piston chamber, the device performs control according to the second characteristic.
摘要:
A disconnect mechanism for a secondary driveline and method of assembly can be used in an all-wheel drive (AWD) vehicle having a rear driveline module (RDM) for changing drive modes between a two-wheel drive mode and an AWD mode. The disconnect mechanism can include a hydraulically actuated coupling clutch connected to a power take-off unit (PTU) for transferring rotary power from the PTU to the RDM during the AWD mode, a hydraulically actuated first and second rear clutch for rotationally connecting and disconnecting corresponding first and second rear axles drivingly coupled to rear wheels during the AWD mode and two-wheel drive mode, respectively, and a hydraulic actuating assembly including a source of pressurized fluid for actuating the coupling clutch, the first rear clutch, and the second rear clutch, and for synchronizing any speed differential therebetween.
摘要:
A power transfer device can include a housing, first and second input members, first and second output members, a differential, and a pump. The housing can define a sump. The first input member can receive rotational power and rotate about an axis. The second input member can be meshingly engaged with the first input member and can rotate through the sump. The differential case can be drivingly coupled to the second input member. The differential gearset can transmit rotary power between the differential case and the first and second output members. The pump can be disposed about the first input member and can have an inlet, outlet, and pump element. The inlet can be coupled for fluid communication with the sump. The pump element can be drivingly coupled to the first input member and can pump the fluid from the sump when the first input member rotates about the axis.
摘要:
An arrangement of a vehicle is provided having normal transverse engine/transmission normal two-wheel drive operation which can be selectively placed into four-wheel drive operation wherein a pump which powers the coupling or uncoupling is independent of the transmission lubrication pump and is powered by the transmission.