插电式混合动力汽车纯电动行进间启动发动机的平顺性控制

The ride comfort control of PHEV during engine starting in-motion process

针对单电机插电式混合动力汽车在纯电动行进间电动机启动发动机时由于系统输出转矩变化进而引起整车冲击的问题,分析得到发动机点火时刻的不同及离合器接合状态的不同是造成转矩波动的原因。在此基础上,提出了基于离合器主、从动盘转速差和电机角加速度为输入量的离合器压力模糊控制的混合动力汽车模式切换动态协调控制策略,并对比了发动机目标转速点火和怠速转速点火的控制效果。最后通过台架试验以及实车道路试验对提出的控制策略进行了验证。结果表明,基于目标转速点火的协调控制策略能减小整车的冲击度。

Improper management of engine starting in-motion of PHEV （plug-in hybrid electric vehicle） may result in noticeable jerk. The engine ignition time and the clutch state are the key to the ride comfort control. Therefore, a clutch pressure fuzzy control algorithm for PHEV mode transition is proposed, which bases on torque coordination control and starting engine at target speed. And the strategy is verified through bench test and road test, and the test results indicate that the torque coordination control strategy which is based on engine starting at target speed and clutch pressure fuzzy control algorithm can improve vehicle ride comfort.