A transmission (2) of a motor vehicle includes a first sub-transmission (5) including a first input shaft (7) and a countershaft (11) coupled to the first input shaft (7) via a constant ratio (ic). The transmission (2) further includes a second sub-transmission (6) including a second input shaft (8), the second sub-transmission (6) being a planetary transmission (PG) with a sun gear (24), a ring gear (22), and a carrier (23). Moreover, the transmission (2) includes an output shaft (9), and a shift element (E). The carrier (23) is coupleable to the output shaft (9) via the shift element (E), and the ring gear (22) is the second input shaft (8) of the second sub-transmission (6).

A gear unit includes: a stepped planetary gearset, and first and second gear shifting elements. The stepped planetary gearset has first and second sun gears, a first ring gear and a plurality of stepped planet gears rotatably mounted at a first planet carrier. The first ring gear is connected to an output shaft of the gear unit thus being fixed with respect to rotation relative to it. The first planet carrier is connected to a housing and fixed with respect to rotation relative to it. The first gear shifting element drivingly connects the second sun gear to an electric machine in a closed state, and the second gear shifting element drivingly connects the first sun gear to an electric machine in a closed state. One of the two gear shifting elements is in the closed state for driving the output shaft in rotation.

A gear unit includes: a stepped planetary gearset, and first and second gear shifting elements. The stepped planetary gearset has first and second sun gears, a first ring gear and a plurality of stepped planet gears rotatably mounted at a first planet carrier. The first ring gear is connected to an output shaft of the gear unit thus being fixed with respect to rotation relative to it. The first planet carrier is connected to a housing and fixed with respect to rotation relative to it. The first gear shifting element drivingly connects the second sun gear to an electric machine in a closed state, and the second gear shifting element drivingly connects the first sun gear to an electric machine in a closed state. One of the two gear shifting elements is in the closed state for driving the output shaft in rotation.

A hybrid vehicle includes: an internal combustion engine; a rotating electric machine; a planetary gear mechanism to which the internal combustion engine, the rotating electric machine and an output shaft are connected; a catalyst that purifies exhaust gas of the internal combustion engine; and a controller that controls the internal combustion engine and the rotating electric machine. The controller controls the internal combustion engine and the rotating electric machine to perform catalyst temperature control to shift an operating point on a map representing a relationship between rotation speed of the internal combustion engine and torque generated by the internal combustion engine so that the catalyst has a temperature within an appropriate temperature range. Degradation of the catalyst can be suppressed without deteriorating the function of the catalyst.

A hybrid vehicle includes: an internal combustion engine; a rotating electric machine; a planetary gear mechanism to which the internal combustion engine, the rotating electric machine and an output shaft are connected; a catalyst that purifies exhaust gas of the internal combustion engine; and a controller that controls the internal combustion engine and the rotating electric machine. The controller controls the internal combustion engine and the rotating electric machine to perform catalyst temperature control to shift an operating point on a map representing a relationship between rotation speed of the internal combustion engine and torque generated by the internal combustion engine so that the catalyst has a temperature within an appropriate temperature range. Degradation of the catalyst can be suppressed without deteriorating the function of the catalyst.

A hybrid all-wheel-drive vehicle includes an engine, first and second motor generators, a first clutch between the second motor generator and a front wheel, a second clutch between the second motor generator and a rear wheel, and a control unit that controls, based on a vehicle traveling state, the engine, the motor generators, and the clutches. The first motor generator is coupled to the engine and the front wheel in a manner capable of transmitting torque. During regeneration, the control unit engages the first clutch and disengages the second clutch. When the all-wheel-drive vehicle shifts from motor traveling to hybrid traveling, the control unit restarts the engine by operating the first motor generator and regulates engagement forces of the clutches and output torque of the second motor generator to compensate driving torque of the front wheel by the second motor generator while maintaining driving torque of the rear wheel.

A hybrid all-wheel-drive vehicle includes an engine, first and second motor generators, a first clutch between the second motor generator and a front wheel, a second clutch between the second motor generator and a rear wheel, and a control unit that controls, based on a vehicle traveling state, the engine, the motor generators, and the clutches. The first motor generator is coupled to the engine and the front wheel in a manner capable of transmitting torque. During regeneration, the control unit engages the first clutch and disengages the second clutch. When the all-wheel-drive vehicle shifts from motor traveling to hybrid traveling, the control unit restarts the engine by operating the first motor generator and regulates engagement forces of the clutches and output torque of the second motor generator to compensate driving torque of the front wheel by the second motor generator while maintaining driving torque of the rear wheel.

A hybrid drive sub-assembly for a vehicle, including primary toothed wheels, secondary toothed wheels capable of being coupled to a secondary shaft, an intermediate shaft to which intermediate toothed wheels are rigidly connected for rotation therewith, the primary toothed wheel(s) and the secondary toothed wheel(s) each permanently meshing with a corresponding toothed wheel of the intermediate toothed wheels. This hybrid sub-assembly is provided with a motorized module including a reversible electric machine, an interface for connection to the intermediate shaft, a speed reducer, a power take-off member and a dual clutch mechanism capable of coupling and uncoupling the power take-off member to and from the reversible electric machine and the intermediate shaft.

A hybrid drive sub-assembly for a vehicle, including primary toothed wheels, secondary toothed wheels capable of being coupled to a secondary shaft, an intermediate shaft to which intermediate toothed wheels are rigidly connected for rotation therewith, the primary toothed wheel(s) and the secondary toothed wheel(s) each permanently meshing with a corresponding toothed wheel of the intermediate toothed wheels. This hybrid sub-assembly is provided with a motorized module including a reversible electric machine, an interface for connection to the intermediate shaft, a speed reducer, a power take-off member and a dual clutch mechanism capable of coupling and uncoupling the power take-off member to and from the reversible electric machine and the intermediate shaft.

A method and system for operating a transmission that includes two power take off devices is described. In one example, an internal combustion engine and/or an electric machine may supply power to accessory devices via first and second power take off devices. Alternatively, power may be delivered to the transmission via one or both of the first and second power take off devices.