Development of a engine start control method for P2 hybrid vehicles in launch situation

摘要

In this paper, the P2 hybrid system with dual clutch automatic transmission (DCT) is used as the research object, and the process which the vehicle driven by motor alone switch to driven by engine in launch situation is analyzed. Focusing on preventing the wheel driving torque variation caused by motor torque rising instantaneously in the process of engine start, the effective method of let the DCT clutch slip at a desired speed, coordinated control strategy of power source torque to reduce the jerk of the vehicle in different launch situation is proposed. Finally, the strategy is verified through vehicle test, the test results showed that the control strategy proposed in this paper can improve the ride comfort of the vehicle during the driving mode transition process effectively.