A hybrid power transmission for a hybrid power vehicle comprising a motor, a motor shaft connected to the motor, a transmission input shaft connected to an internal combustion engine, and a transmission output shaft is provided. The transmission input shaft and the motor shaft are arranged coaxially, and the motor shaft is designed as a hollow shaft. A first gear is disposed on the motor shaft in a sleeved manner, a third gear and a fifth gear are disposed on the transmission input shaft in a torsion-proof manner, a first synchronizer is disposed between the first gear and the third gear. A second gear is disposed on the transmission output shaft in a torsion-proof manner, the second gear meshing with the first gear, a fourth gear and a sixth gear are disposed on the transmission output shaft in a sleeved manner, the fourth gear meshing with the third gear, the sixth gear meshing with the fifth gear, and a second synchronizer is disposed between the fourth gear and the sixth gear. By switching the synchronizers, motor torque can be directly output to the transmission input shaft or output to the transmission output shaft.

The present invention provides a power system for a hybrid vehicle, relating to the field of hybrid vehicles. The power system mainly includes an engine, a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, a first input shaft, a first clutch, a brake, and a second clutch. Since the second motor is connected to the first input shaft through the second planetary gear mechanism, the planetary gear mechanism can reduce the speed of the second motor and increase the torque to effectively reduce the size of the second motor or improve the acceleration performance of the vehicle. Since the first clutch between the first input shaft and the engine is disengaged when driven by the second motor, the drag resistance of the engine is reduced, and the fuel economy of the vehicle is improved.

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator an HVAC compressor and a controller. The transmission has an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and a mainshaft. The motor generator is selectively couple to the countershaft. The HVAC compressor is selectively driven by the motor generator. The controller operates the transmission system in various modes based on operating conditions.

The invention relates to a hybrid powertrain in a motor vehicle with an internal combustion engine (1), an electric machine (2), a variable transmission (4) and one or more driven wheels (3). The transmission (4) includes at least a variator unit (9) for varying the output speed of the internal combustion engine (1) and a first differential gearing (5) with three rotary members (51, 54, 53) that are respectively drivingly connected to an output shaft (92) of the variator unit (9), a rotor shaft (21) of the electric machine (2) and a wheel shaft (31) of the driven wheels (3). The invention concerns a method for operating such a hybrid powertrain.

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 double planetary gear (5), comprising a first sun gear and a first ring gear and a second sun gear and a second ring gear and a planet carrier. The input shaft (10) can be coupled to the planet carrier of double planetary gear (5) by means of the first shifting element (SE1) and can be coupled to the first sun gear of the double planetary gear (5) by means of the second shifting element (SE2), and can be coupled to the first ring gear of the double planetary gear (5) by means of the third shifting element (SE3) and the output shaft (11) is coupled to the planet carrier of the double planetary gear (5).

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

A clutch is disengaged when a torque condition is satisfied at a predetermined time when a system is stopped as a fuel supply to an engine is stopped from a state where the engine is operating with the clutch being engaged. The torque condition is a condition under which torque acting on an output shaft of the engine is torque in a direction in which an engine speed of the engine is decreased and torque output to a rotary shaft of a motor is torque in a direction in which a motor speed of the motor is decreased.

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 system for a vehicle including a hybrid machine and a transmission arrangement that includes a first, a second and a third planetary gear set each including a sun gear, a planet carrier and a ring gear, the transmission arrangement further including five shift elements engageable in combinations of two to obtain six forward gear stages, wherein the ring gear of the first planetary gear set and the planet carrier of the second planetary gear set are operatively connected to each other, the ring gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other, two planetary members of the third planetary gear set are selectively connectable to each other by a single one of the shift elements, wherein the hybrid machine and the ring gear of the first planetary gear set are connected to each other.

A limp-home control method for a hybrid vehicle may include: a fault determination step for determining, by a controller, whether a solenoid valve battery short circuit fault occurs in a transmission; a first limp-home step for controlling, by the controller, solenoid valves to implement a limp-home gear stage while maintaining a state where power is suppliable to the solenoid valves involved in shifting gears when it is determined that the solenoid valve battery short circuit fault exists; an engine necessity verification step for verifying, by the controller, whether engagement of an engine clutch is needed; and a second limp-home step for driving, by the controller, a solenoid valve controlling the engine clutch to engage the engine clutch, implementing limp-home driving by engine power when the engagement of the engine clutch is needed.