A transmission for a vehicle may include a first input shaft continuously receiving rotational power from a power source; a second input shaft selectively receiving the rotational power of the power source through a clutch; a first counter shaft and a second counter shaft connected to the first input shaft and the second input shaft through a transfer gear pair, respectively; a controlling device selecting the transfer gear pair to transfer the rotational power from the first input shaft and the second input shaft to the first counter shaft and the second counter shaft; a one-way clutch allowing the rotational power provided to the first input shaft to be transferred only from the first input shaft toward the first counter shaft.

A method is provided to control a hybrid powertrain that comprises: a combustion engine; a gearbox with input and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear, connected to the first planetary gear and a second main shaft; first and second electrical machines, respectively connected to the first and second planetary gears; one gear pair connected with the first planetary gear and output shaft; and one gear pair connected with the second planetary gear and output shaft. The method comprises: disconnecting a first planetary wheel carrier and a first sun wheel or disconnecting a second planetary wheel carrier and a second sun wheel from each other; b) controlling the combustion engine to a predetermined engine speed; and c) controlling the first and second electrical machines so that a desired torque is achieved in the output shaft, while a requested total power consumption of the first and the second electrical machines is achieved.

A hybrid drive for a motor vehicle comprising a first transmission input shaft for connecting to a first internal combustion engine, a second transmission input shaft, which is coaxial to the first transmission input shaft and connects to a first electric motor, a layshaft, a first gear shifting device connecting the first transmission input shaft and the second transmission input shaft in a first shifting setting and engaging a gear in a second shifting setting, and a transmission output shaft.

A transmission may include a first input shaft continuously receiving torque from a power source; a second input shaft selectively receiving torque from the power source through a clutch; a first countershaft and a second countershaft connected with the first input shaft and the second input shaft, respectively, by a transfer gear pair; coupling devices transmitting torque to the first countershaft and the second countershaft from the first input shaft and the second input shaft by selecting the transfer gear pairs; a one-way clutch disposed on the first countershaft to allow torque provided to the first input shaft to be transmitted only to the first countershaft from the first input shaft; and a shifting mechanism including a plurality of shift gear pairs having different gear ratios on the first countershaft, the second countershaft, and the output shaft.

Disclosed in the present disclosure are a dual-motor coupling driving system and a control method therefor. The dual-motor coupling driving system comprises a driving apparatus and a transmission apparatus; the driving apparatus comprises a first motor and a second motor; the first motor and the second motor are coaxially arranged, and an output shaft of the first motor passes through the second motor; the transmission apparatus comprises a first input shaft, a second input shaft, a first gear pair, a second gear pair, a third gear pair, a fourth gear pair, a first clutch unit, a second clutch unit, a first intermediate shaft, a second intermediate shaft, and a system output shaft; the first motor is connected to the first input shaft; the second motor is connected to the second input shaft; the first clutch unit is fixed on the system output shaft; and the second clutch unit is fixed on the second intermediate shaft. According to the present disclosure, dual motors are coaxially arranged, four dual-motor gears are realized by means of four gear pairs, and the dual motors both can participate in transmission, and thus, orderly upshifting without power interruption can be realized in the process of gear shifting.

A hybrid drive system for a motor vehicle has an internal combustion engine having a drive shaft via which first drive torques can be supplied by the internal combustion engine to drive the motor vehicle. The system also has an electric machine having a rotor via which second drive torques can be supplied by the electric machine to drive the motor vehicle. The system further has an axle drive having an axle drive input gear via which the axle drive can be driven and a gearbox having a first partial gearbox and a second partial gearbox. The first partial gearbox has a first planetary gear set having a first element, a second element, and a third element, as well as a second planetary gear set having a fourth element and a fifth element connected permanently in a rotationally fixed manner to the first element, and a sixth element.

A transmission for a vehicle providing at least four gear ratios, comprising an input component drivingly connected to a prime mover, such as an electric motor, and a planetary gear system, comprising a first sun gear, a second sun gear, a single ring gear, and a single planet gear carrier carrying a first set of planet gears in meshing engagement with the first sun gear and a second set of planet gears in meshing engagement with the second sun gear. The ring gear is selectively engageable with one of the input component and a fixed member of the transmission. Both the first and the second sun gears are selectively engageable with the input component, and at least one of the first and second sun gears is selectively engageable with the fixed member.