Control systems and methods for transmission of hybrid power vehicle

摘要

A transmission control system for a hybrid-power driving system includes at least a gear shifting actuation module to control engagement of specific gearwheels and a clutch actuation module to control a clutch that couples an engine to the transmission. Gear shifts are required for each of the engine and the electric motor in the hybrid-power driving system. By selectively controlling the clutch and engagement of specific gearwheels, the transmission control system can start the engine when the vehicle is initially powered by the electric motor alone. Starting the internal combustion engine in this case switches the vehicle from a pure motor driving mode to a hybrid driving mode. Additionally, the transmission control system can start the engine when the vehicle is in a parked state, for example, to put the vehicle in a battery charging mode for the electric motor.

主权项

1. A hybrid-power driving system comprising:
a transmission, including:
a plurality of shafts, including an input shaft, a motor shaft, and an output shaft, wherein:(i) the input shaft is coupled to a clutch, the clutch being configured to selectively engage an engine to couple the input shaft to the engine, the engine being configured to generate an engine torque transferable to the input shaft via the clutch,(ii) the motor shaft is coupled to an electric motor, the electric motor being configured to generate a motor torque transferable to the motor shaft, and(iii) the output shaft delivers an output torque from the transmission;a plurality of gearwheels configured to provide a plurality of transmission paths; anda plurality of synchronizers disposed on the plurality of shafts operable to engage a first set of selected gearwheels, the first set of selected gearwheels determining a first transmission path that transfers the motor torque from the motor shaft to the output shaft without transferring any engine torque from the engine to the output shaft; and a transmission control system configured to cause the transmission to transfer both the motor torque from the motor shaft and the engine torque from the engine to the output shaft, the transmission control system including:
a gear shifting actuation module configured to move at least one of the plurality of synchronizers to cause the plurality of synchronizers to engage a second set of selected gearwheels instead of the first set of selected gearwheels, the second set of selected gearwheels being coupled to the plurality of shafts to determine a second transmission path that includes a motor torque transmission path and an engine torque transmission path, the second transmission path transferring the motor torque from the motor shaft and the engine torque from the engine to the output shaft for the output torque; anda clutch actuation module configured to control the clutch, wherein the clutch transfers a clutch torque from the electric motor to the engine to start the engine, and after the engine has started, the clutch transfers the engine torque to the input shaft according to the second transmission path.