An electronic control unit switches a driving mode to a high-gear two-wheel driving mode when a first condition and a second condition are satisfied at the time of driving in a high-gear four-wheel driving mode, and switches the driving mode from the high-gear two-wheel driving mode to the low-gear driving mode when a third condition is satisfied in a state in which the first and second conditions are satisfied. Accordingly, it is possible to shorten a time required for switching to the low-gear driving mode after all of the first to third conditions are satisfied.

A dual clutch transmission as a speed-change transmission for motor vehicles, includes two coaxially arranged input shafts, each being activatable via a clutch, an output shaft and gearwheel sets that are mounted on the shafts and can be shifted by means of shifting clutches to allow a plurality of forward gears and a reverse gear, the gearwheel sets being subdivided into a sub-transmission having the one input shaft and a sub-transmission having the other input shaft. To achieve a wider gear-ratio spread in a structurally compact construction, a shifting unit that can be shifted between two gear ratio stages is mounted upstream of the sub-transmission having the hollow input shaft.

A speed reducing device includes a motor and a speed reducing mechanism. The motor includes a stator portion and a rotor portion. The rotor portion includes a first eccentric ring and a second eccentric ring. The speed reducing mechanism is partially accommodated within the rotor portion. The speed reducing mechanism includes a first roller assembly, a second roller assembly, a third roller assembly, a first cycloid disc set and a second cycloid disc set. The first roller assembly includes at least one first roller. The second roller assembly includes at least one second roller. The third roller assembly includes an output shaft and at least one third roller. The first cycloid disc set is mounted around the output shaft and disposed within the first eccentric ring. The second cycloid disc set is mounted around the output shaft and disposed within the second eccentric ring.

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.

Aspects of the present invention relates to a vehicle control system (1) for controlling a vehicle transfer case (3). The transfer case (3) is operable in a high range and a low range. The vehicle control system (1) is configured to output a range change signal to implement a transfer case range change. The vehicle control system (1) also outputs a brake control signal for controlling vehicle braking during the range change. The present invention also relates to a vehicle (5) and a related method of operating a vehicle control system (1) and optionally also a transmission (7).

An axle assembly having a gear reduction unit and an interaxle differential unit. The gear reduction unit may be operatively connected to an input shaft and may selectively provide gear reduction to a differential assembly and the interaxle differential unit. The interaxle differential unit may operatively connect the gear reduction unit to the output shaft.

An axle assembly having a gear reduction unit and an interaxle differential unit. The gear reduction unit may be operatively connected to an input shaft and may selectively provide gear reduction to a differential assembly and the interaxle differential unit. The interaxle differential unit may operatively connect the gear reduction unit to the output shaft.

A two-speed transfer case configured for use in heavy-duty four-wheel drive vehicles and which is equipped with a low-torque power transfer arrangement and a high-torque power transfer arrangement.

The invention relates to a drive device (7) for a motor vehicle drive train of an electric vehicle. At least one electric machine (14) is provided as the drive machine on the output side of which a downstream transmission (18) is connected. In the transmission (18), an input side (17) and an output side (19) are axially offset (27) in relation to one another, where the output side (19) of the transmission (18) is connected to a distributor device (25) that is paired with multiple outputs (9, 10), which in the motor vehicle drive train (2) each serve to connect one drive axle of the electric vehicle. In order to produce a drive device (7) that is suitable for an all-terrain electric vehicle, the output side (19) of the transmission (18) is positioned downwards in a vertical direction relative to the input side (17) of the transmission (18).

Aspects of the present invention relate to a vehicle control system (1) for controlling a vehicle transfer case (3). The transfer case (3) is operable in a high range and a low range. The vehicle control system (1) is configured to determine an operating range for the transfer case (3) based on a selected vehicle operating mode. A range change signal is output to implement a range change to engage the determined operating range. The present invention also relates to a vehicle (5) and a related method of operating a vehicle control system (1).