Abstract: A safe parking system is provided with: a torque-generating motor; a final drive including side gears drivingly coupled with the motor, a differential gear with a lock to prevent a differential motion between the side gears and an actuator for releasing the lock; an ignition key having an ON position and an OFF position; a differential-lock switch having an open position and a closed position; a switching unit for selecting whether the actuator is turned on or off; and a controller configured to, when the ignition key is detected to be in the OFF position, turn off the actuator if the differential-lock switch is in the open position, and execute no operation about the actuator if the differential-lock switch is in the closed position.

Abstract: A rotary power transmission device includes a device housing having an interior in which multiple gears are received for rotation, a clutch received within the device housing and having a clutch ring selectively engageable with one of the multiple gears, and an actuator having a coil and a plunger driven for movement along an axis and relative to the clutch ring. The plunger has a first position and a second position in which the clutch ring is engaged with one of the multiple gears. The plunger includes a first body formed at least partially from a magnetically responsive material, and includes a radially outer surface, a radially inner surface and a front face that is axially variable and arranged so that a radially outer portion of the front face is axially forward of a radially inner portion of the front face.

Abstract: A rotary power transmission device includes a housing, a clutch, an actuator and a retaining body. The housing has an annular surface and an interior in which multiple components are received for rotation. The clutch is received within the housing and has a clutch ring selectively engageable with one of said multiple components. The actuator has a limit surface, a coil and a plunger driven for movement along an axis and relative to the clutch, and the plunger is received over and movable along the annular surface. The retaining body has a blocking surface radially overlapped with the limit surface and arranged to be contacted by the limit surface to prevent removal of the plunger from the annular surface.

Abstract: A rotary power transmission device includes a device housing, a clutch, an actuator and a retainer. The device housing has an interior in which multiple components are received for rotation. The clutch is received within the device housing and has a clutch ring selectively engageable with one of said multiple components. The actuator has a coil and a plunger driven for movement along an axis and relative to the clutch. And the retainer has a first portion that engages the device housing and a second portion that radially overlaps the coil and limits axial movement of the coil relative to the device housing.

Abstract: Controlling an actual slip of at least one driven axle of a motor vehicle with at least one axle having at least one wheel and a one drive unit for providing a drive torque for the axle and for the wheel can be carried out by a control device for controlling the drive unit. The control device can be configured for establishing a first actual speed of the motor vehicle; establishing a second actual speed of the at least one wheel; calculating a target speed of the at least one wheel for the established first actual speed taking into account parameters; determining an actual slip of the at least one wheel with respect to a substrate on which the motor vehicle is being moved; when the actual slip exceeds a defined first limit slip, generating a limit torque by which the drive torque produced by the drive unit is adjusted.

Abstract: Connector assembly for electrically connecting an inverter busbar to an electrical connector of a drive unit comprising: a carrier, an intermediate busbar comprising a first terminal with a hole, and a first fastening element extending through the hole of the first terminal, wherein the intermediate busbar is mounted to the carrier and the intermediate busbar is connectable to the inverter busbar by the first fastening element, wherein the carrier comprises a positioning pin defining a longitudinal axis, said positioning pin being adapted to be accommodated in a receptacle of a housing of the drive unit such that the carrier is axially slidable in the direction of the longitudinal axis; and that the first fastening element is arranged within the hole of the first terminal with a radial clearance relative to the longitudinal axis of the positioning pin.

Abstract: A differential is provided with: a torque receiving casing; a differential gear set having first and second side gears to differentially distribute torque to the first and second side gears; a clutch interposed between the casing and the first side gear and configured to exert a frictional braking force on the first side gear against the casing to limit a differential motion between the first side gear and the second side gear; an actuator configured to apply a pressing force to the clutch to control the differential motion; and an electronic control unit configured to calculate a demand torque value from the input torque, compare the wheel load with a threshold value to determine a correction value, make a correction in the demand torque value by the correction value to obtain a demand value, and control an electric power supplied to the actuator in response to the demand value.

Abstract: A clutch assembly comprises at least one controllable friction clutch for variable torque transmission between a clutch input part and a clutch output part; a hydraulic actuator assembly for actuating the friction clutch, the actuator assembly comprising a hydraulic pump, a hydraulic chamber in which hydraulic pressure for the friction clutch is built up by the hydraulic pump and a return flow element with an orifice, via which hydraulic fluid can flow out of the hydraulic chamber into a housing reservoir when the hydraulic pump is not actuated, wherein the hydraulic fluid defines a filling level in the housing reservoir; wherein an outlet opening of the return flow element lies below the filling level of the hydraulic fluid in a inactive state.

Abstract: A system for controlling a clutch is provided with: a thrust member movable between a first position for disconnecting the clutch and a second position for connecting the clutch; a solenoid generating a magnetic flux in response to input of electric power; a movable element drivingly coupled with the thrust member and set into motion by the magnetic flux to drive the thrust member between the first position and the second position; an electric circuit configured to add alternating-current power to the electric power and apply the electric power with the alternating-current power to the solenoid; and a controller configured to detect a phase difference of an electric current relative to an electric voltage in the alternating-current power added to the electric power and compare the detected phase difference with a reference value to determine whether the thrust member is at the first position or at the second position.

Abstract: A system for using a motor to control a power transmission device for driving a vehicle is provided with a clutch member movable bidirectionally in an axial direction; a base member prevented from rotating about an axis; a counter member axially away from and opposed to the base member, the counter member being restrained from moving in both a circumferential direction and the axial direction; an action member interposed between the base member and the counter member, movable in the axial direction, drivingly coupled with the clutch member, and coupled with the motor to create a rotational motion about the axis; and a cam slope tilting in the circumferential direction and ascending from the base member toward the counter member to convert the rotational motion into a motion of the action member in the axial direction.

Abstract: A vehicle power transfer unit assembly includes an input shaft, a shift collar, an outer cam ring, and an inner cam ring. The shift collar is engaged with the input shaft and operable between a first position and a second position. The outer cam ring is disposed around a portion of the shift collar. The outer cam ring includes an inner surface defining a plurality of levels. The inner cam ring is engaged with the shift collar and disposed radially inward from the outer cam ring. The inner cam ring includes a jaw engageable with the plurality of levels. The shift collar is moved from the first position to the second position when the jaw is moved from engagement with one of the plurality of levels to engagement with another of the plurality of levels.

Abstract: A power transmission device includes a clutch, an actuator and a stop member. The clutch is received within a first housing and has a first clutch member coupled to the second housing and a second clutch member coupled to the first housing, the second clutch member is movable and selectively engageable with the first clutch member. The actuator has a coil and a plunger driven for movement by a magnetic field generated by the coil so that the plunger moves axially to move the second clutch member relative to the first clutch member. The stop member has a retracted position spaced from the plunger and an advanced position within a path of movement of the plunger to limit movement of the plunger when the stop member is in the advanced position.

Abstract: A power transmission device is provided with: a rotary body arranged to receive the torque to rotate about an axis; a clutch including a clutch member engaging with the rotary body and axially movable and clutch teeth connectable with the clutch member to transmit the torque; a solenoid configured to generate a magnetic flux in response to input of electric power; a stator coupled with the solenoid as to conduct the magnetic flux and prevented from rotation about the axis; a rotor arranged to receive the magnetic flux from the stator and, when driven by the received magnetic flux, to create a rotational motion about the axis; and a conversion mechanism drivingly connected with the rotor to convert the rotational motion into a linear motion in a direction along the axis, the conversion mechanism including a thrust member transmitting the linear motion to the clutch member.

Abstract: A differential device is provided with: a casing rotatable about an axis; a differential gear set including a pair of side gears housed in the casing and rotatable about the axis, a pinion shaft penetrating perpendicular to the axis and being secured to the casing; and pinion gears rotatably supported by the pinion shaft and so meshed with the side gears as to enable differential motion between the side gears; friction clutches interposed between the side gears and an inner periphery of the casing to limit the differential motion; a pair of repulsive bodies respectively applying force in directions along the axis to the friction clutches; and a block in contact with and supporting in the directions along the axis both the repulsive bodies, the block so fitting on the pinion shaft as to impose reaction forces from the friction clutches on the pinion shaft.

Abstract: A final drive differentially for distributing torque input into a shaft via a differential device to a pair of axles is provided with a ring gear coupled via gearing to the shaft to transmit the torque to the differential device. A housing unitarily includes a main portion supporting the shaft and enclosing the differential device, and a wall portion including a first opening through which one of the axles passes and supporting a first end of the differential device. A cover included a second opening through which the other of the axles passes, and is combined with the housing to support a second end of the differential device, wherein the wall portion, the ring gear, and the shaft are arranged, from the wall portion toward the cover, in an order of the wall portion, the ring gear, and the shaft.

Abstract: A differential device is provided with: an input case having an axially directed end face; a differential gear set with side gears allowing a differential motion therebetween; dog teeth toothed toward the end face on an output case; a clutch structure engageable with the dog teeth and so structured as to couple the output case or the second side gear with the input case when engaged; an axially movable clutch member including an internal end and an external end exposed to the exterior; an axially movable armature including a magnetic material and in contact with the external end; a solenoid supported away from the end face, the solenoid generating a magnetic flux to attract the armature and, via the clutch member, set the clutch structure in mesh with the dog teeth; and a spring biasing the clutch member in a contrary direction.

Abstract: In at least some implementations, a clutch member includes a main body having a central axis, a radially inner surface, a radially outer surface, a rear face and a front face, multiple teeth formed in the front face with adjacent teeth circumferentially spaced apart, and a rim extending axially from the main body and located radially outwardly of the teeth. The rim extends axially farther from the rear face than do the teeth.

Abstract: A differential device includes a differential case, a first output gear and a second output gear, and an interrupting mechanism. The differential case is rotatable. A drive force can be input to the differential case. The first output gear and the second output gear are accommodated in the differential case. The first output gear and a second output are rotatable with respect to the differential case and output the drive force received from the differential case. The interrupting mechanism is disposed on a side of the first output gear and connects and disconnects power transmission between the differential case and the first output gear. The first output gear is coupled to an output shaft through an intermediate member.

Abstract: A gear device drivingly coupling a drive shaft with first and second axles is provided with a case coupled via gearing with the drive shaft, and rotatable about an axis; a hub that is couplable with the first axle; a clutch member retained by the case and disengageably engaged with the hub; a biasing element retaining the clutch member at a position where the clutch member engages with the hub; and a differential gear set coupling the case via gearing with the first and second axles and locked by the clutch member to prevent differential motion between the first axle and the second axle.

Abstract: A disconnectable coupling device rotatable about an axis is provided with a first shaft having an end and a hub formed on the end, the hub including a flange extending radially from the end and a round wall projecting axially from the flange and defining a hollow; a second shaft aligned with the first shaft and opposed to the end of the first shaft, the second shaft having a drum overhanging the hub; a multi-plate clutch held between the hub and the drum to disconnectably connect the hub with the drum; a cup so fixed with the hub as to define a gutter around the first shaft; and one or more perforations axially passing through the flange to establish fluid communication between the gutter and the hollow.