关键词: 电动汽车, 换挡规律, 动力性, 经济性

Abstract:

This paper took two-speed automated mechanical transmission(AMT) of a pure electric vehicle as the research object, studied the differences between power and economic shifts.Some conclusions are obtained: 1)the difference of shift schedule is obvious at low load and high load, not obvious at medium load;
2)the difference of ECE energy consumption is obvious at low load, not obvious at high load;
3)the difference of 0~50km/h accelerating ability is obvious, the difference of 50~80km/h accelerating ability is not obvious. On the basisof above, a kind of comprehensive shift strategy was put forward considering dynamics performance and economic performance. Simulation results show that the comprehensive shift schedule has dynamics performance as power shift schedule, and has economic performance as economic shift schedule.

Key words: electric vehicle, shift schedule, power performance, economic performance