关键词: 两挡变速器, 无动力中断换挡, 冲击度, 滑摩功, 参数优化

Abstract: For a seamless two-speed electric vehicle transmission,a shifting mechanism parameters optimization method was put forward.The shift mechanism of this two-speed transmission and the working process of shift were presented.The vehicle dynamics model was established,and the shift mechanism parameters' influence on shifting jerk and sliding friction work was researched.On this basis,the shifting mechanism parameters were preliminarily matched,and the multi-objective optimization model was established,whose optimization variables were shifting mechanism parameters with the objective of shifting jerk and sliding friction work.By using the improved gray wolf algorithm,the model was solved with Matlab/Simulink simulation,and the effectiveness of this algorithm was verified through the case.The two-speed transmission shift test bench was built,and the result showed that the power was uninterrupted through the shifting process.

Key words: two-speed transmission, seamless shift, shifting jerk, sliding friction work, parameters optimization