A liquid-cooled integrative power system for electric forklift includes an integrated transmission gearbox, an integrated motor controller, a drive motor, an oil pump motor, an oil pump and a vehicle controller. The integrated transmission gearbox includes a drive motor transmission mechanism and an oil pump motor transmission mechanism. The integrated motor controller includes a drive motor control unit and an oil pump motor control unit. The integrated transmission gearbox, the integrated motor controller, the drive motor, the oil pump motor, the oil pump and the vehicle controller are completely integrated and mounted to form the liquid-cooled integrative power system for electric forklift.

An assembly for an electric vehicle includes an input shaft extending along a first axis and an electric motor rotatably coupled to the input shaft and co-axially aligned with the first axis. The assembly also includes an intermediate input shaft extending along a second axis and rotatably coupled to the input shaft. The assembly also includes an output shaft extending along the second axis and spaced from the intermediate input shaft along the second axis. The assembly further includes a planetary gearset rotatably coupled to the intermediate input shaft and to the output shaft, and co-axially aligned with the second axis. The assembly includes a final drive co-axially aligned with the first axis and rotatably coupled to the output shaft for providing rotational torque to at least one of a first and second set of wheels of the electric vehicle.

A vehicle drive device includes: a rotating electrical machine that functions as a driving force source for wheels; an input member drivingly connected to rotating electrical machine; a pair of output members each drivingly connected to wheel; a differential gear mechanism that distributes rotation transmitted from rotating electrical machine to pair of output members; a transmission gear mechanism that drivingly connects input member and differential gear mechanism; a hydraulic pump that includes a pump rotor and chamber housing the pump rotor and that supplies oil to at least the rotating electrical machine; and a case. The case includes a partition portion that separates in an axial direction a first housing chamber housing rotating electrical machine and a second housing chamber housing transmission gear mechanism and differential gear mechanism). Pump chamber is formed in partition wall so as to be located between first and second housing chambers in the axial direction.

A transmission configured to change a speed of rotation transmitted from a rotary electric machine side includes a first gear and a second gear disposed on a first axis, and a third gear, a fourth gear, and an output gear disposed on second axis parallel to first axis. The first gear and the third gear mesh with each other, and second gear and the fourth gear mesh with each other. A differential gear mechanism includes a differential input gear disposed on a third axis parallel to the first axis and the second axis and meshing with the output gear. The first gear and the second gear are disposed on a first axial side with respect to a rotor of the rotary electric machine. The parking gear is disposed on the second axis on a second axial side with respect to the third gear, the fourth gear, and the output gear.

A transmission assembly for an electric drive comprises a drive shaft, a reduction gearing rotatably drivable by the drive shaft, a power distribution unit drivingly connected to the reduction gearing and configured to transmit a rotational motion to two output parts, a parking lock unit having a parking ratchet wheel which is connected in a rotationally fixed manner to a torque-transmitting member in the power path between the drive shaft and the output parts, and having a controllable locking element which can be selectively engaged with the parking ratchet wheel; wherein the parking lock unit is arranged in a parking lock housing which is liquid-tightly sealed with respect to a transmission housing so that a first oil bath in the transmission housing is separated from a second oil bath in the parking lock housing.

A rotary electric machine is disposed coaxially with an input member more toward a first side in an axial direction than a first gear that meshes with a second gear. A third gear rotates integrally with second and fourth gears that mesh with third gear more toward second side in axial direction than first and second gears. An axis of a counter gear mechanism is below axis of rotary electric machine and axis of differential gear mechanism. An inverter device more toward first side in axial direction than fourth gear and above axis of differential gear mechanism while that inverter device overlaps fourth gear as seen in axial direction. A specific portion of inverter device is between rotary electric machine and fourth gear in axial direction, such that specific portion overlaps counter gear mechanism as seen in up-down direction and overlaps rotary electric machine as seen in axial direction.

Provided is a control device performing upshifting engagement control where engagement pressure of a second engagement device is gradually increased, and disengagement control where a disengagement force to disengage a first engagement device acts on a meshing portion of the first engagement device. The control device gradually increases engagement pressure of the second engagement device toward target engagement pressure at which transmission torque capacity of the second engagement device reaches a magnitude determined based on input torque from a drive power source to an input member, and changes engagement pressure of the second engagement device set at or after a time when the engagement pressure of the second engagement device reaches set engagement pressure lower than the target engagement pressure, smaller than a change rate of the engagement pressure of the second engagement device set before reaching the set pressure, and thereafter starts the disengagement control.

Disclosed is a coaxial asynchronous motor drive system, comprising a speed reducer, an electric motor and a main housing, and further comprising a motor controller, wherein the electric motor and the speed reducer are connected to form a motor reducer assembly and mounted inside the main housing, and the motor controller is fixed to the main housing and connected to the motor reducer assembly. The system of the disclosure reduces parasitic loss of an auxiliary motor drive system of a battery electric four-wheel-drive vehicle and increases the rang per charge of the vehicle, and the compact and integrated coaxial motor drive system facilitates maximum utilization of available space of the vehicle.

A hybrid transmission for a vehicle includes a transmission input shaft extending in a transverse direction, at least one countershaft arranged parallel to the transmission input shaft, a clutch device arranged coaxially with respect to the transmission input shaft and which has at least one clutch, and a differential having a differential input gear. A rotational axis of the differential input gear is arranged parallel to the transmission input shaft. The transmission also includes an electric machine having a rotor with a rotor rotational axis arranged parallel to the transmission input shaft and a transmission control device. As viewed in a longitudinal direction perpendicular to the transverse direction, the differential input gear, the transmission input shaft, and a transmission controller including the transmission control device are arranged in succession in the sequence specified.

A transmission device is provided in which a parking mechanism and a breather chamber are provided within a power-transmission case, the breather chamber being present at least above an input gear and providing communication between the interior of the power-transmission case and the exterior of the power-transmission case, wherein the breather chamber, which is present at least above the input gear and providing communication between the interior of the power-transmission case and the exterior of the power-transmission case, extends further outward than the input gear in an arrangement direction of the input gear and the output gear, and part of the parking mechanism is disposed within the breather chamber. Thus, it is possible to increase the capacity of a breather chamber while avoiding an increase in the size of a transmission device.