A four-wheel drive vehicle includes: (a) main drive wheels and auxiliary drive wheels; (b) a rotating machine as a drive power source; (c) a drive-power distribution clutch configured to allocate a part of a drive power outputted to the main drive wheels from the drive power source, to the auxiliary drive wheels, so as to distribute the drive power to the main drive wheels and the auxiliary drive wheels with a drive-power distribution ratio between the auxiliary drive wheels and the main drive wheels, such that the drive-power distribution ratio is variable with an engaging force of the drive-power distribution clutch being controlled; and (d) a control apparatus configured, when determining that a heat load of the drive-power distribution clutch is large during deceleration running of the vehicle, to limit a regenerative torque of the rotating machine, as compared with when determining that the heat load is small.

The disclosure relates to a transmission comprising an input shaft, a first output shaft, a second output shaft, a first planetary gear set, and a second planetary gear set which is connected to the first planetary gear set. Each of the planetary gear sets comprises multiple elements. The input shaft, the two output shafts, the planetary gear sets, as well as the elements thereof are arranged and designed such that—a torque introduced via the input shaft is converted and is distributed to the two output shafts in a defined ratio, and the development of a sum torque is prevented. At least one element of the first planetary gear set is rotationally fixed to another element of the second planetary gear set. Another element of the second planetary gear set is secured to a rotationally fixed component.

Differential arrangement, e.g., for a drive axle of a motor vehicle. The differential arrangement comprises a drive wheel; a differential gear having an input part; a shift clutch operatively arranged between the drive wheel and the differential gear, wherein in the closed state of the shift clutch torque is transmitted from the drive wheel to the differential gear and in the open state of the shift clutch a torque transmission is interrupted. A first clutch part of the shift clutch is fixedly connected to the input part or to a differential housing of the differential gear, and a second clutch part of the shift clutch is fixedly connected to the respective other one of the input part and the differential housing.

A vehicle includes a chassis, an engine coupled to the chassis, a power source coupled to the chassis, and a track assembly. The track assembly includes an electric motor coupled to the chassis, a first drive wheel coupled to the electric motor and pivotally coupled to the chassis, a second drive wheel coupled to the engine and pivotally coupled to the chassis, and a track engaging the first drive wheel and the second drive wheel. The engine is configured to provide mechanical energy to the second drive wheel to drive the track and propel the vehicle. The electric motor is configured to receive electrical energy from the power source and provide mechanical energy to the first drive wheel to drive the track and propel the vehicle.

A front-and-rear-wheel-drive vehicle includes an electric motor; a speed change mechanism; a first output rotation shaft that transmits a drive force of the electric motor that has been transmitted to an intermediate output member, to one of a front wheel side and a rear wheel side; and a second output rotation shaft that transmits the drive force that has been transmitted to the intermediate output member, to another of the front wheel side and the rear wheel side. The first and second output rotation shafts are disposed coaxially with the intermediate output member. The electric motor is disposed such that a rotation axis of a motor shaft is positioned in parallel with a rotation axis of the intermediate output member and the first and second output rotation shafts and vertically above the rotation axis of the intermediate output member and the first and second output rotation shafts.

A front-and-rear-wheel-drive vehicle includes an electric motor; a speed change mechanism; a first output rotation shaft that transmits a drive force of the electric motor that has been transmitted to an intermediate output member, to one of a front wheel side and a rear wheel side; and a second output rotation shaft that transmits the drive force that has been transmitted to the intermediate output member, to another of the front wheel side and the rear wheel side. The first and second output rotation shafts are disposed coaxially with the intermediate output member. The electric motor is disposed such that a rotation axis of a motor shaft is positioned in parallel with a rotation axis of the intermediate output member and the first and second output rotation shafts and vertically above the rotation axis of the intermediate output member and the first and second output rotation shafts.

An apparatus and methods are provided for a transmission for a rear mid-engine vehicle. The transmission comprises a power transfer portion for receiving torque from the engine and a gearbox for providing conversions of rotational speed and torque. First and second side output portions conduct torque from the gearbox to the rear wheels. A forward output portion conducts torque to front wheels of a four-wheel drive vehicle. An air clutch comprising each output portion controls the degree of torque transferred to each wheel. The output portions are each coupled to a rear wheel by a rear axle, bevel gears, and rear portal gears. The rear axles are aligned with, and positioned above, the trailing arms to protect the rear axles from damage due to rocks and debris. The length and alignment of the rear axles cause CV joints to articulate in the same direction as the trailing arms.

A front wheel clutch and a front wheel acceleration clutch are supported to a front wheel transmission shaft. Between the front wheel clutch and the front wheel acceleration clutch, there is provided a holder supporting the front wheel transmission shaft. A first operational oil passage for switching over the front wheel clutch is defined respectively in and between the holder and the front wheel transmission shaft. A second operational oil passage for switching over the front wheel acceleration clutch is defined respectively in and between the holder and the front wheel transmission shaft.

A front wheel clutch and a front wheel acceleration clutch are supported to a front wheel transmission shaft. Between the front wheel clutch and the front wheel acceleration clutch, there is provided a holder supporting the front wheel transmission shaft. A first operational oil passage for switching over the front wheel clutch is defined respectively in and between the holder and the front wheel transmission shaft. A second operational oil passage for switching over the front wheel acceleration clutch is defined respectively in and between the holder and the front wheel transmission shaft.

A drivetrain for a motor vehicle includes a prime mover including a rotatable power shaft, wherein the prime mover is configured to translate energy stored in a power source into rotational torque that is applied to the power shaft, a hydraulic drive unit including a hydraulic pump mechanically connected to the power shaft, a hydraulic motor fluidically connected to the hydraulic pump, and an output shaft mechanically connected to the hydraulic motor, and a transmission mechanically connected to the output shaft and configured to provide one or more gear reductions across the transmission.