A transmission device and method for operating a transmission for a motor vehicle, which transmission device has an input shaft which is operatively connectable to a drive device of the motor vehicle, and has a first output shaft and a second output shaft, and has a spur gear differential transmission configured as a planetary transmission, whereby the input shaft and an intermediate shaft are coupled to the first output shaft and the second output shaft. An electric machine is coupled to the input shaft in a first shifting position of the shifting device and to the intermediate shaft in a second shifting position of the shifting device, and the electric machine is operated for applying a torque to the input shaft.

A transmission for vehicles with hybrid propulsion systems. In particular agricultural or industrial vehicles, wherein the propulsion system comprises a motor of the non-regenerative type, a motor of the regenerative type which is associated with an energy accumulator and with a generator. The transmission includes an input shaft which is connected to the motor of the non-regenerative type and to which the generator is connected, a low-speed shaft and a high-speed shaft which can be selectively coupled to the input shaft by respective clutches, a movement combination device, an output shaft which is connected to the movement combination mechanism, and a blocking element which is configured to block the low-speed shaft or the high-speed shaft.

An assembly set for transmission devices for motor vehicles. Each of the transmission devices has an input shaft which can be operatively connected to a drive device of the motor vehicle, as well as a first output shaft, and a second output shaft, and has a spur gear differential transmission designed as a planetary transmission, via which the input shaft and an intermediate shaft that is coupled or can be coupled to an electric machine arranged coaxially to the input shaft are coupled to the first output shaft and the second output shaft. The electric machine is coupled to the input shaft in a first shift position of a shift device and to the intermediate shaft in a second shift position of the shift device.

An electrified vehicle torque transfer system includes, among other things, an engine having an engine shaft, an electric machine having an electric machine shaft, a first clutch that is selectively engaged to rotatably couple together the engine shaft and the electric machine shaft such that the engine can drive rotation of the electric machine, and a second clutch that is selectively engaged to rotatably couple together the engine shaft and the electric machine shaft such that the electric machine can drive rotation of the engine.

A hybrid powertrain for a vehicle may include a first input shaft connected to an engine, a second input shaft connected to the engine and coaxially mounted with the first input shaft, a motor input shaft coaxially mounted with the first input shaft and connected to a motor, first and second output shafts mounted in parallel to the first input shaft and the second input shaft, a variable drive gear provided at the motor input shaft to transmit power from the motor input shaft to the first output shaft, a complex synchronizer to couple and separate the first input shaft and the motor input shaft and to couple and separate the variable drive gear and the motor input shaft, and a plurality of external gear pairs configured to respectively define different gear ratios.

A hybrid powertrain for a vehicle may include a first input shaft selectively connectable to an engine through a first clutch; a second input shaft selectively connectable to the engine through a second clutch and mounted to be coaxial with the first input shaft; a motor input shaft mounted to be coaxial with the first input shaft and to which a motor is connected; a first output shaft and a second output shaft each mounted in parallel to the first input shaft and the second input shaft; a center synchronizing unit mounted between the first input shaft and the motor input shaft and configured to interrupt a connection between the first input shaft and the motor input shaft; a plurality of pairs of circumscription gears configured to form a series of shift ratios used for driving of the vehicle; and a variable transmission mechanism.

A system includes a planetary gear assembly having a ring gear, a plurality of planet gears coupled to a carrier, and a sun gear coupled to a main shaft. The system further includes a driven gear coupled to the carrier, a countershaft gear coupled to the driven gear, a motor/generator coupled to the main shaft, and an actuator structured to change a coupling of the ring gear based on a position of the actuator.

An energy recovery drive system includes a motor-generator that is structured to selectively operate in a motor mode and a generator mode. A first shaft is operatively coupled to a transmission power take-off shaft. A second shaft is operatively coupled to the motor-generator and to an alternative power source. The energy recovery drive system is controllably operated in a plurality of operating modes. In a first operating mode, the motor-generator is in torque providing engagement with each of the first and second shafts. In a second operating mode, the motor-generator is in torque communicating engagement with each of the first and second shafts. In a third operating mode, which the motor-generator is in torque communicating engagement with the second shaft and is disengaged from transferring torque to the first shaft and from receiving torque from the first shaft.

Systems and methods for operating a vehicle that includes an engine and an integrated starter/generator are described. In one example, a torque output of an electric machine is increased via a rotation ratio changing device to reduce engine noise and vibration during engine starting. After the engine is started, the rotation ratio changing device is adjusted so that the engine and the electric machine rotate at a same speed.

A transmission arrangement for a hybrid drive of a motor vehicle, in particular a utility vehicle, having change-speed transmission (G) with a drive output shaft (AW), a retarder (RE) with a retarder shaft (RW), an electric machine (EM) with a rotor shaft (RO) and a first gear ratio step (Ü1) between the drive output shaft (AW) and the retarder shaft (RW). The retarder (RE) is driven by way of the first gear ratio step (Ü1). The electric machine (EM) is arranged with its axis parallel to the retarder (RE) and can be coupled to the retarder shaft (RW) by way of a second gear ratio step (Ü2).