CVT式耦合系统的混合动力汽车电机起动发动机性能研究

摘要

针对CVT式新型耦合系统混合动力汽车在模式切换过程中出现动力源输出扭矩波动过大的问题进行模式分析。划分工作模式区域，确定模式切换条件及相应动力源的目标扭矩。研究发动机和电机目标扭矩动力协调控制算法，制定模式切换过程中CVT速比控制策略。用Simulink搭建仿真模型进行仿真分析，并采用台架试验进行验证。结果表明，采用该扭矩协调控制策略能有效降低模式切换过程中的扭矩波动，提高了模式切换的品质。%To troubleshoot the oversized output torque ripple of power source during mode switching of CVT hybrid vehicle with new type coupling system, we make mode analysis by dividing operating mode area and define mode switching conditions and target torque of corresponding power source. By studying power coordinated control algorithm of engine and motor target torque, we develop CVT speed ratio control strategy during mode switching. We use Simulink to establish simulation model for analysis and verify with bench test. The results show that this coordinated torque control strategy can effectively reduce torque ripple during mode switching, and improve mode switching quality.