根据两档自动变速器(2AMT)在纯电动汽车中的优势,设计了2AMT基本机械结构,详尽阐述了换挡原理、换挡流程与换挡中可能存在的问题,分析无离合器电动汽车换挡过程。针对换挡过程中的换挡冲击对换挡品质的影响,提出了对电机的转矩控制,利用Matlab/Simulink建立控制策略模型并联合Cruise平台以某款原型车进行建模仿真,最后建立台架试验验证仿真结果。结果显示换挡冲击度小,换挡品质高,试验仿真结果表明,所设计的变速器及其控制方案完全满足设计要求。

According to the advantage of the two speeds transmission in pure electric vehicle, the 2AMT basic structure and shifting mechanism is designed, the principle of shifting, the shift in the shift process and possible problems are described in detail and shift process of electric vehicles without clucch is analyzed. Based on influence of the impact of shifting on the shift quality in the process of shifting, the torque control is proposed. The control strategy model is established by Matlab/Simulink and modeling and simulation are carried out on a certain vehicle on Cruise platform. Finally testing for validation is performed. The results show a small degree shift shock and the high shift quality, indicating that the transmission and the designed control scheme can well meet the requirements.