强混合动力汽车驱动模式切换扭矩协调控制策略

Coordinated torque control strategy for driving-mode-switch of strong hybrid electric vehicle

在对强混合动力系统工作特性分析的基础上,以车辆行驶平顺性为目标,通过对系统在不同驱动模式切换过程中发动机、电机及离合器和变速器参数变化的分析,制定了针对不同模式切换过程扭矩波动的扭矩协调控制策略。建立了基于该控制策略的强混合动力汽车动力学仿真模型,进行了典型驱动模式切换过程的仿真与分析。结果表明,提出的扭矩协调控制策略能够减小驱动模式切换过程中的扭矩波动,有效提高强混合动力汽车在模式切换过程中的动力传递的平稳性。

For a new type of strongly hybridized system,the vehicle ride performance is used as the study goal,a coordinated control strategy is put forward to suppress the torque surge after the analysis of the parameters changes of engine,motor,clutch and transmission during the driving-mode-switch process.The strongly hybridized vehicle simulation model is developed based on the coordinated control strategy.The typical drive mode switching process performance simulation and analysis are performed.The results show that introducing the coordinated control strategy reduces the torque surge during the driving-mode-switch process and improves the vehicle drivability.