A drive device for a motor vehicle has an electric drive machine which is operatively connected to a transmission via a driveshaft. The transmission has at least first and second planet gear stages and a differential stage. The first planet gear stage has a first planet gear set with planet gears rotatably arranged on a first planet gear carrier and mesh with a first sun gear and a first ring gear. The second planet gear stage has a second planet gear set with planet gears rotatably arranged on a second planet gear carrier and mesh with a second sun gear and a second ring gear. The planet gear stages are operatively connected to a double clutch device with first and second power-shift clutches, the ring gears are rigidly connected together to form a common ring gear, and the planet gear carriers are rigidly connected together to form a common planet gear carrier.

A planetary transmission (1) with a differential (3) and at least one set of planetary gears (6) and with a common planetary carrier (9) for the differential (3) and the set of planetary gears (7) and with at least one set of planet journals (18). The planet journals (7) and first differential gears (11) of the differential (3) are seated so as to follow one another axially on in each case one planet journal (18) and, here, are axially separated from one another by way of the intermediate web (20). The intermediate web (20) which extends in radial directions runs axially between a first toothing plane (I) and a second toothing plane (II).

An electro-hydraulic hybrid-power driving system, comprising an engine, a first motor, a second motor, a first planetary gear set, a second planetary gear set, and a hydraulic control shift set that is connected to the engine. The first motor is axially connected to the engine, the second motor is axially connected to the first planetary gear set and the second planetary gear set, and the first planetary gear set is coaxially connected to the second planetary gear set. The hydraulic control shift set includes a first gear and a second gear, a dual wet clutch is disposed between the first gear and the second gear, and the first gear, the second gear, and the dual wet clutch are coaxially connected to the engine. The present invention by disposing a specific electro-hydraulic hybrid-power driving system, different working modes can be implemented according to different requirements.

A first ring gear of a drive unit is connected to a second carrier and is mechanically connected to a counter shaft. A first sun gear is connected to a second sun gear and a first rotary electric machine. A first clutch selectively switches between a connection state and a disconnection state of the first sun gear and an engine. A second clutch selectively switches between a connection state and a disconnection state of a first carrier and the engine. A brake selectively switches between a fixed state and a release state of a second ring gear to and from a fixing member.

A hybrid powertrain and a method for controlling the powertrain are provided to convert an EV mode, a power slit mode, and a parallel mode based on a driving state. The powertrain includes an input shaft connected to an engine and first and second motors/generators installed within a transmission housing. A planetary gear set is installed on an input shaft and includes a combination of a sun gear, a planetary carrier, and a ring gear. A first output gear is connected to the second motor/generator and a second output gear is connected to the planetary carrier of the planetary gear set. A rotation restraint mechanism restricts a rotation of the input shaft. An overdrive brake is connected to the sun gear of the planetary gear set or the first motor/generator. An output shaft is supplied with power through the first and second output gears.

A powertrain assembly includes a transmission, an engine, first and second motor/generators and a controller. The controller includes a processor and memory on which is recorded instructions for executing a method for controlling engine pulse torque cancellation commands. The controller is programmed to determine an engine pulse torque (T.sub.P). The controller is programmed to calculate a first motor torque pulse command (T.sub.A) for the first motor/generator as a product of a first gear factor (G.sub.1), the engine pulse torque (T.sub.P) and a first ratio (I.sub.A/I.sub.E) of a predetermined first moment of inertia (I.sub.A) for the first motor/generator and a predetermined engine moment of inertia (I.sub.E). Similarly, the controller is programmed to calculate a second motor torque pulse command (T.sub.B) for the second motor/generator. The controller is programmed to control the first and second motor/generators in response to the first and second motor torque pulse commands, respectively.

A power transmission device comprises an engine arranged on a shaft and a first motor. A second motor is arranged on a different shaft from the shaft on which the engine is arranged. A first differential mechanism has a sun gear to which the first motor is connected, a carrier to which the engine is connected, and a ring gear to which the second motor and a drive wheel are connected. A second differential mechanism has a first rotational element to which the first motor is connected, a second rotational element, and a third rotational element to which the engine is connected, and is arranged such that the first motor is located between the first differential mechanism and the second differential mechanism. A case houses the second differential mechanism. A brake mechanism is configured to restrict rotation of the second rotational element and is arranged in the case.

A power transmission device of a work vehicle includes a generator, a motor, and an energy storage unit. The energy storage unit stores electricity generated by the generator. A forward/backward travel switch operation device receives an instruction for forward or backward travel from an operator. A vehicle speed detection unit detects the speed of the vehicle. A control unit includes an energy management requirement determination unit. The energy management requirement determination unit determines, on the basis of the difference between a target electricity storage amount and a current electricity storage amount in the energy storage unit, the energy management required power required by the power transmission device for charging the energy storage unit. The energy management requirement determination unit increases the target electricity storage amount when a first travel direction according to the instruction and a second travel direction determined from the vehicle speed are different.

Methods and systems for a vehicle transmission are provided. In one example, a vehicle transmission system is provided that includes a first planetary gear set rotationally coupled to a second planetary gear set, a first electrical machine rotationally coupled to a sun gear in the first planetary gear set, and a second electrical machine rotationally coupled to a sun gear in the second planetary gear set. The transmission system also includes an inter-axle differential including a third planetary gear set rotationally coupled to a first axle and a second axle and selectively rotationally coupled to the first planetary gear set and the second planetary gear set, wherein the inter-axle differential is configured to selectively enable and disable speed differentiation between the first and the second axles.

A power train for an electric vehicle may include an input shaft to which a motor is fixedly connected; a driving gear rotatably mounted on the input shaft; an output shaft disposed in parallel to the input shaft; a driven gear fixed to the output shaft and gear-engaged with the driving gear; a planetary gear set including first, second and third rotation elements wherein the first rotation element is fixedly connected to the input shaft and the second rotation element is fixedly connected to the driving gear, and the third rotation element is restrained from rotating; a friction clutch configured for selectively connecting the input shaft to the driving gear and configured for selectively connecting the input shaft to the driving gear; and a restraining device provided to the third rotation element to implement two states so that only one-way rotation of the third rotation element of the planetary gear set is restrained or two-way rotation thereof is restrained.