P2混动自动变速器的离合器自适应控制

To solve the responsiveness and comfort issues of coupling in a hybrid power system, the power flow model, which is used to simulate the engine starting process by the C0 hybrid clutch, and the parallel mode power output process were established. Through a simulation analysis of the C0 clutch engine starting control process, a shift clutch slip control strategy is proposed to solve the matching problem between the C0 clutch starting torque and the e-motor torque. To realize stable and accurate engine starting control and eliminate the errors from the independent part torque control and the hydraulic system, adaptive control of both the C0 clutch engine starting process and B1 clutch slipping is proposed. The C0 clutch pressure control parameters were adjusted adaptively at different stages to optimize the engine starting process by monitoring the slip of the shifting clutch and the overshoot of the engine speed. The results show that slip control of the shift clutch can solve the matching issues between the C0 clutch torque and the e-motor torque. The engine starting process can be completed in 1.5 s while ensuring the comfort. In the vehicle test process, engine speed overshoot and engine starting shock can be effectively solved by using C0 clutch adaptive control.