A power transmission system includes: a power source; a first motor generator unit; a system power output portion; a first and a second mode conversion devices. The power source and the first motor generator unit is connected to or disconnected from the system power output portion through the first mode conversion device. The power source can be connected to or disconnected from the first mode conversion device through the second mode conversion device. The second mode conversion device includes a conversion device input shaft, a first conversion device intermediate shaft and a conversion device output shaft, and the conversion device output shaft is connected to the first motor generator unit; and power from the power source is suitable for being decelerated sequentially through the conversion device input shaft, the first conversion device intermediate shaft and the conversion device output shaft and then output to the first mode conversion device.

The invention relates to a transmission (100) for a hybrid drive arrangement which can be coupled to two drive assemblies (7, 8), comprising an input shaft (10), and an output shaft (11), at least one first, second, third and fourth shifting element (SE1, SE2, SE3, SE4), and at least one first planetary gear (5) and one second planetary gear (6). The input shaft (10) can be coupled to the ring gear planet carrier of the first planetary gear (5) by means of the first shifting element (SE1) and the output shaft (11) is coupled to the planet carrier of the first planetary gear (5). The planet carrier of the first planetary gear (5) can be coupled to the ring gear of the second planetary gear (6) by means of the second shifting element (SE2) and the planet carrier of the first planetary gear (5) can be coupled to the sun gear of the second planetary gear (6) by means of the third shifting element (SE3). The sun gear of the first planetary gear (5) can be coupled to the sun gear of the second planetary gear (6) by means of the fourth shifting element (SE4).

A multi-stage dual clutch transmission for a vehicle includes: a first input shaft selectively connectable to an engine through a first clutch and having odd driving gears fixed thereon; a second input shaft disposed coaxially with the first input shaft, selectively connectable to the engine through a second clutch, and having even driving gears fixed thereon; a first output shaft and a second output shaft disposed in parallel with the first and second input shafts and have odd and even driven gears being freely rotatable thereon in mesh with the odd and even driving gears, respectively; and a motor shaft disposed in parallel with the first and second output shafts, connected to a motor, having first and second delivery gears being freely rotatable thereon, and having first and second one-way clutches transmitting power to the first and second delivery gears, respectively, when rotating in a predetermined direction thereof.

A dual-clutch transmission includes first and second partial transmissions, a first countershaft to which a first output gear is permanently connected in a rotationally fixed manner, and a second countershaft to which a second output gear is permanently connected in a rotationally fixed manner. A first idler assigned to the first partial transmission and a second idler assigned to the second partial transmission are respectively arranged coaxially to the first countershaft and are couplable to each other in a rotationally fixed manner by a bridge switching element. The first partial transmission includes exactly three single-gear planes, including a first single-gear plane, second single-gear plane having the first idler, and third single-gear plane. The second partial transmission includes exactly two single-gear planes, including a fourth single-gear plane having the second idler and a fifth single-gear plane, and which is equipped such that eight transmission gears can be implemented with a falling transmission ratio.

A transmission device for a power system, comprising a first electric motor (EM1), a second electric motor (EM2), a single planetary gear train (PG), and a reduction gear transmission mechanism. The transmission device is provided with a brake (B1) and two clutches (C1, C2) and is capable of achieving the electric motor driving mode of two gears and satisfying low-speed high-torque and high-speed usage requirements of electric motor driving. During hybrid power driving, an input power splitting and fixed speed ratio mode is adopted to achieve high-efficient operation of the power system. By removing components such as clutches connected to an engine, the transmission device can also be used as a dual-motor two-gear electric motor drive transmission.

A method of operating a vehicle having a hybrid drive, a transmission with shift elements, a drive output with a brake, a main transmission with input shafts, an output shaft and planetary gear sets (PG1, PG2). The main transmission has five gear planes. One shift element can connect a gear plane to an element of gear set (PG1) adjoining the main transmission. Another shift element couples a further element of gear set (PG1) either to the output shaft or a housing. An electric machine is permanently connected to an element of gear set (PG2). If, while driving with a transmission gear engaged, the drive output brake is engaged for a full brake application, a shift element of the transmission is first relieved by the electric machine and/or a brake assigned to one of the input shafts and then subsequently disengaged to decouple the combustion engine from the drive output.

A hybrid module for coupling an internal combustion engine in a motor vehicle includes an axis of rotation, an electric machine, a space, and a clutch. The electric machine has a rotor arranged on the axis of rotation. The space is surrounded by the rotor. The clutch is for transmitting a torque from a drive assembly. The clutch is arranged in the space surrounded by the rotor and includes a rotational part fixed to the rotor and arranged on the axis of rotation. The rotational part extends further radially from the axis of rotation than the rotor such that a heat introduced into the rotational part from the rotor or the clutch can be discharged.

A transmission (G) for a motor vehicle includes an electric machine (EM), an input shaft (GW1), an output shaft (GWA), two planetary gear sets (P1, P2), and at least five shift elements (A, B, C, D, E). Different gears can be selected by selectively actuating the at least five shift elements (A, B, C, D, E). In interaction with the electric machine (EM), different operating modes can be implemented.

The invention relates to a transmission (100) for a hybrid drive arrangement which can be coupled to two drive assemblies (7, 8), comprising an input shaft (10), and an output shaft (11), at least one first, second and third shifting element (SE1, SE2, SE3), and at least one first planetary gear (5). The input shaft (10) can be coupled to a first transmission shaft (16) by means of the first shifting element (SE1). The first transmission shaft (16) can be coupled to the sun gear of the planetary gear (5) by means of the second shifting element (SE2) and the ring gear of the planetary gear (5) is coupled to the first transmission shaft (16). The input shaft (10) can be coupled to the sun gear of the planetary gear (5) by means of the third shifting element (SE3). The output shaft (11) is coupled to the planet carrier of the planetary gear (5).

A switchable powertrain comprises at least four points of freedom. The switchable powertrain comprises a main gear set configured for gear ratio selection, the main gear set comprising main gears coupled to a main shaft and second gears coupled to a second shaft. An adapter comprises a first selective coupling configured to selectively couple to the main shaft, and a second selective coupling configured to selectively couple to the second shaft. A first torque source and a clutch are configured for selectively coupling or decoupling first torque to the main shaft. A second torque source is configured for selectively outputting second torque to the first selective coupling or to the second selective coupling.