An inner peripheral surface of an outer cylindrical tubular portion and an outer peripheral surface of an inner cylindrical tubular portion of a rotor are respectively shaped into a stepped form. A radial distance between the outer cylindrical tubular portion and the inner cylindrical tubular portion at a counter-armature side location is larger than that of an armature side location in the rotor. An outer peripheral surface of an outer cylindrical tubular portion and an inner peripheral surface of an inner cylindrical tubular portion of a stator are respectively shaped into a stepped form. A radial distance between the outer peripheral surface of the outer cylindrical tubular portion and the inner peripheral surface of the inner cylindrical tubular portion at the counter-armature side location is larger than that of the armature side location in the stator.

A transfer case comprises a primary output shaft, and a secondary output shaft selectively coupleable to the primary output shaft with a plate clutch to transfer torque therebetween. The plate clutch includes a housing, a plurality of interleaved plates that are engaged alternatingly with the primary output shaft and the housing to rotate therewith, and an apply plate non-selectively coupled to the primary output shaft to rotate therewith. The apply plate is moveable axially along the primary output shaft into a first configuration in which the apply plate is positively coupled to the housing to rotate therewith, a second configuration in which the apply plate rotates independent of the housing, and a third configuration in which the apply plate compresses the interleaved plates to form a friction coupling between the primary output shaft and the housing.

A two-speed drive unit of an electric vehicle includes a planetary gear set transmission having multiple elements including a first element, a second element and a third element. A motor generator unit supplies a motive force to the planetary gear set transmission. A first stage gear transfers the motive force to the planetary gear set transmission from the motor generator unit. A second stage gear is connected through the second element to a final drive. A first torque transmitting device defining a selectable one-way clutch (SOWC) is connected to the third element.

A two-speed drive unit of an electric vehicle includes a planetary gear set transmission having multiple elements including a first element, a second element and a third element. A motor generator unit supplies a motive force to the planetary gear set transmission. A first stage gear transfers the motive force to the planetary gear set transmission from the motor generator unit. A second stage gear is connected through the second element to a final drive. A first torque transmitting device defining a selectable one-way clutch (SOWC) is connected to the third element.

An actuator for a transfer case includes an actuator member, a face cam mechanism, and a motor. The actuator member includes a circumferential flange and an annular body extending from an inner periphery of the circumferential flange. The annular body includes a circumferential slot opposite the flange defined between two end walls formed by the annular body. One of the end walls includes a bearing member coupled thereto. The face cam mechanism includes a follower coupled to a cam member. The cam member is configured to displace axially when rotated. The follower is disposed within the slot. In a first range of motion, the annular member is rotated independent of the face cam mechanism. In a second range of motion, the bearing member engages the follower to rotate the second cam member relative to the first cam member, and the follower moves axially along the bearing member.

An actuator for a transfer case includes an actuator member, a face cam mechanism, and a motor. The actuator member includes a circumferential flange and an annular body extending from an inner periphery of the circumferential flange. The annular body includes a circumferential slot opposite the flange defined between two end walls formed by the annular body. One of the end walls includes a bearing member coupled thereto. The face cam mechanism includes a follower coupled to a cam member. The cam member is configured to displace axially when rotated. The follower is disposed within the slot. In a first range of motion, the annular member is rotated independent of the face cam mechanism. In a second range of motion, the bearing member engages the follower to rotate the second cam member relative to the first cam member, and the follower moves axially along the bearing member.

A shift control method for a DCT vehicle, which adjusts a time required to shift gears through clutch control in a DCT. The shift control method includes controlling a release-side dutch such that the release-side dutch is partially disengaged by a controller when gear shifting is initiated in a state in which an accelerator pedal is not pressed, performing synchronization control by partially applying an apply-side dutch torque in an initial stage of synchronization such that an engine rotational speed follows and synchronizes an apply-side input shaft speed, and partially applying a release-side dutch torque in a last stage of synchronization by the controller, and performing torque hand-over control such that an apply-side clutch is engaged while the release-side clutch is disengaged by the controller, after performing the synchronization control.

A shift control method for a DCT vehicle, which adjusts a time required to shift gears through clutch control in a DCT. The shift control method includes controlling a release-side dutch such that the release-side dutch is partially disengaged by a controller when gear shifting is initiated in a state in which an accelerator pedal is not pressed, performing synchronization control by partially applying an apply-side dutch torque in an initial stage of synchronization such that an engine rotational speed follows and synchronizes an apply-side input shaft speed, and partially applying a release-side dutch torque in a last stage of synchronization by the controller, and performing torque hand-over control such that an apply-side clutch is engaged while the release-side clutch is disengaged by the controller, after performing the synchronization control.

A transfer case includes an input shaft, a primary output shaft, a secondary output shaft, and an actuator. The primary output shaft is coupled to the input shaft with a gear reduction mechanism. The secondary output shaft is selectively coupleable to the primary output shaft with a secondary torque transfer mechanism. The actuator includes a first actuation mechanism, a second actuation mechanism, and a driver gear assembly. The first actuation mechanism is configured to operate the gear reduction mechanism. The second actuation mechanism is configured to operate the secondary torque transfer mechanism. The drive gear assembly includes a gear plate member, a sense plate member configured to engage the first actuation mechanism, and a hub member configured to engage the second actuation. The sense plate member and the hub member are independently coupled to the gear plate member to rotate in unison with the gear plate member.

A transfer case includes an input shaft, a primary output shaft, a secondary output shaft, and an actuator. The primary output shaft is coupled to the input shaft with a gear reduction mechanism. The secondary output shaft is selectively coupleable to the primary output shaft with a secondary torque transfer mechanism. The actuator includes a first actuation mechanism, a second actuation mechanism, and a driver gear assembly. The first actuation mechanism is configured to operate the gear reduction mechanism. The second actuation mechanism is configured to operate the secondary torque transfer mechanism. The drive gear assembly includes a gear plate member, a sense plate member configured to engage the first actuation mechanism, and a hub member configured to engage the second actuation. The sense plate member and the hub member are independently coupled to the gear plate member to rotate in unison with the gear plate member.