混合动力汽车由纯电动工况起动发动机特性研究

Pure Electric Mode Starting Engine Performance Research of HEV

针对CVT混合动力汽车机电动力耦合系统,划分出工作模式区域,研究了驱动工况下的扭矩管理。为满足整车平顺性要求,结合发动机的动力性和经济性,研究了各工作模式切换过程中机电动力耦合系统控制策略以及发动机与电机之间的动力协调控制算法。进行了整车动力学建模与仿真分析,并采用台架试验进行验证。结果表明,在单电机、CVT式混合动力系统中,采用所制定的扭矩协调控制策略,能有效的降低模式切换过程中的扭矩波动,提高模式切换的品质,实现混合动力汽车各模式切换的平稳控制。

A ccording to the CVT hybrid vehicles＇ mechanical and electrical power coupling system, it divides the operation model region, and studies the torque management strategy for driving-mode-switclu In order to meet the vehicle dynamic performance and comfort requirements, the coordinated torque control strategy and the power between engine and motor of the coordinated control algorithm are developed. It builds the simulation model and simulates the process of starting the engine in driving with coordinated torque control strategy, and verifies the results with bench test. The results show that using the torque for coordinated control strategy, the single motor, CVT type hybrid system, can effectively reduce switching mode in the process of torque fluctuation and improve the quality of the switching mode, and realize the hybrid cars each mode switch stable control.