A module for a system for driving and synchronizing a countershaft of a transmission gearbox. The module includes a coupling device having an input element intended to be rotationally coupled to a reversible electric machine and an output element intended to be rotationally coupled to the countershaft. The coupling device has a coupled state in which the clutch device is able to transmit torque between the input element and the output element and an uncoupled state in which the input element and the output element are uncoupled. Also included is a lock-up device which has a lock-up state in which said lock-up device blocks the rotation of the input element of the clutch device, and a released state in which said lock-up device allows the input element to rotate.

A vehicle control system configured to limit damage to an electric storage device even if a speed of a motor is changed abruptly. The control system includes a differential mechanism connected to an engine, a motor, and drive wheels, and a clutch. The control system includes a controller is configured to calculate an upper limit power possible to be applied or discharged to or from an electric storage device when a condition to engage the clutch is satisfied and restrict the electric power to be applied or discharged to or from the electric storage device when the electric power is equal to or less than a maximum allowable power that is less than the upper limit power before the clutch is engaged.

A vehicle control system configured to limit damage to an electric storage device even if a speed of a motor is changed abruptly. The control system includes a differential mechanism connected to an engine, a motor, and drive wheels, and a clutch. The control system includes a controller is configured to calculate an upper limit power possible to be applied or discharged to or from an electric storage device when a condition to engage the clutch is satisfied and restrict the electric power to be applied or discharged to or from the electric storage device when the electric power is equal to or less than a maximum allowable power that is less than the upper limit power before the clutch is engaged.

A hydraulic system for a hybrid module which is located between an engine and a transmission includes a parallel arrangement of a mechanical pump and an electric pump. Each pump is constructed and arranged to deliver oil to other portions of the hydraulic system depending on the operational mode. Three operational modes are described including an electric mode, a transition mode, and a cruise mode. Various monitoring and control features are incorporated into the hydraulic system.

A hydraulic system for a hybrid module which is located between an engine and a transmission includes a parallel arrangement of a mechanical pump and an electric pump. Each pump is constructed and arranged to deliver oil to other portions of the hydraulic system depending on the operational mode. Three operational modes are described including an electric mode, a transition mode, and a cruise mode. Various monitoring and control features are incorporated into the hydraulic system.

The invention relates to a transmission structure for a hybrid vehicle with an internal combustion engine, a first electric machine, and a second electric machine. In this case, a first electric machine shaft which is assigned to the first electric machine can be driven by a drive shaft which can be driven by the internal combustion engine via a first gear set. In this case, a travel drive gear of a differential gearing of the vehicle can be driven by a second electric machine shaft assigned to the second electric machine via a second gear set. The transmission structure can thereby be compactly designed and in particular, the use of the installation space and/or the efficiency of the electric machines can be improved in that the first gear set has a ring gear with inner teeth and a spur gear which engages with the inner teeth of the ring gear.

A gear engagement method for a hybrid vehicle includes detecting whether or not baulking occurs when a controller attempts to engage a target gear via a synchronizer. The gear engagement method also includes checking, by the controller, for a stationary state of the vehicle if the result of the detecting shows that there is baulking. The gear engagement method also includes engaging, by the controller via the synchronizer, a different gear that shares a same input shaft with the target gear if the result of the checking shows that the vehicle is in a stationary state. The gear engagement method also includes reattempting an engagement with the target gear after disengaging the different gear. The disengaging and the reattempting are performed by the controller via the synchronizer after the engaging.

A gear engagement method for a hybrid vehicle includes detecting whether or not baulking occurs when a controller attempts to engage a target gear via a synchronizer. The gear engagement method also includes checking, by the controller, for a stationary state of the vehicle if the result of the detecting shows that there is baulking. The gear engagement method also includes engaging, by the controller via the synchronizer, a different gear that shares a same input shaft with the target gear if the result of the checking shows that the vehicle is in a stationary state. The gear engagement method also includes reattempting an engagement with the target gear after disengaging the different gear. The disengaging and the reattempting are performed by the controller via the synchronizer after the engaging.

A transmission system for hybrid propulsion vehicles comprises a torque convertor, an external output shaft of the torque convertor which is rigidly connected to the output of the convertor and an internal output shaft which is rigidly connected to the input of the convertor, a gearbox which can be selectively connected to drive wheels of the vehicle, a main coupling member for selectively transmitting the movement of the external shaft to the gearbox, an electric motor which can be selectively operated as a motor and as an electrical generator. The transmission system further comprises a downstream coupling member and an upstream coupling member which are arranged upstream and downstream of the torque convertor, respectively, and which are capable of selectively connecting the rotor element to the external shaft and the internal shaft, respectively. The electric motor further comprises a rotor element which is arranged at an opposite distal end of the external shaft with respect to the torque convertor, with the main coupling member being arranged in an intermediate position between the torque convertor and the distal end.

A transmission system for hybrid propulsion vehicles comprises a torque convertor, an external output shaft of the torque convertor which is rigidly connected to the output of the convertor and an internal output shaft which is rigidly connected to the input of the convertor, a gearbox which can be selectively connected to drive wheels of the vehicle, a main coupling member for selectively transmitting the movement of the external shaft to the gearbox, an electric motor which can be selectively operated as a motor and as an electrical generator. The transmission system further comprises a downstream coupling member and an upstream coupling member which are arranged upstream and downstream of the torque convertor, respectively, and which are capable of selectively connecting the rotor element to the external shaft and the internal shaft, respectively. The electric motor further comprises a rotor element which is arranged at an opposite distal end of the external shaft with respect to the torque convertor, with the main coupling member being arranged in an intermediate position between the torque convertor and the distal end.