基于P2.5构型的混合动力汽车模式切换动态协调控制策略

针对一款P2.5构型并联型插电式混合动力汽车由纯电动驱动切换到混合驱动模式的控制策略进行了研究。根据进入离合器滑磨阶段转速阈值的不同,分别设计了离合器再次滑磨时发动机转速低于目标转速的控制策略和离合器再次滑磨时发动机转速高于目标转速的控制策略。针对第1种策略中离合器转矩从负到正突变带来较大冲击度的问题,提出了以整车纵向加速度为控制目标的电机转矩补偿控制来抑制冲击度。对提出的两种控制策略进行了仿真验证,结果显示两种控制策略均能实现良好的控制效果,通过仿真结果比较分析了两种控制策略的优缺点,并提出了两种控制策略的适用工况条件。

Mode Transition Dynamic Coordination Control Strategies for P2.5 Hybrid Electric Vehicles

The coordination control strategy of switching from pure electric drive mode to hybrid drive mode was studied for a P2.5 parallel plug-in hybrid electric vehicle.According to the different engine speeds during the clutch engagement process,the control strategies for the engine speed lower than and higher than the target speed were respectively designed.In the first strategy,the clutch torque changes from negative to positive abruptly,which caused a large vehicle jerk.Aiming at solving this problem,the motor torque compensation control with the target acceleration was proposed to suppress the vehicle jerk.The two control strategies proposed were simulated and the results show that both control strategies can achieve good control effects.The advantages and disadvantages of the two strategies were compared and analyzed and the applicable working conditions were discussed.