双行星排式液驱混合动力汽车模式切换的协调控制

Coordinated Control of Mode Switch for Hydraulic Hybrid Vehicle with Double Planetary Gear Set

针对双行星排式液驱混合动力汽车这一构型,分析了它在运行模式切换时出现动力不足和冲击的原因,提出了提高动力性和减小冲击的协调控制算法,同时,为拉维娜氏结构提出其高、低速比切换时两个离合制动器的控制方法。用AMESim和Matlab搭建了联合仿真模型,进行仿真。结果表明,采用协调控制后的车辆在运行模式切换时动力性和冲击度都得到改善,拉维娜氏结构高、低速比切换也达到预期要求。

Aiming at the configuration of hydraulic hybrid vehicle with a double planetary gear set,the causes of under power and jerk in operation mode switch are analyzed with a coordinated control algorithm for raising power and reducing jerk proposed.Meanwhile a way of control is put forward for two clutch brakes in switching between high and low speeds for Ravigneaux gear set.A co-simulation model is built with software AMESim and Matlab with a simulation conducted.The results show that with the coordinated control algorithm adopted,both power performance and jerk in switching working modes of vehicle are improved and the high-low speed switching behavior of ravigneaux structure also meets expected requirements.