Comprehensive Gear Shift Schedule of a Two-speed PEV Powertrain for Low Energy Consumption

Abstract

Abstract: In order to coordinate the contradiction between the dynamic performance and the economic performance of PEVs， this paper proposed a comprehensive shift schedule based on a two-speed PEV powertrain. Firstly， the strategies of obtaining the torque for low energy consumption were presented under the economic performance mode. Then the dynamic shift schedule and the economy shift schedule for a two-speed powertrain were formulated. The optimization model of comprehensive shift schedule was established with the objectives of the acceleration time during 0~100 km/h and the energy consumption per unit mass. And then the model was solved by the crossover particle swarm optimization algorithm to obtain the shift schedule curves. Three kinds of shift schedule were compared and analysed by using MATLAB/Simulink platform. Results show that the comprehensive shift schedule for low energy consumption may balance the dynamic performance and the economic performance of PEVs.

Key words: two-speed pure electric vehicle（PEV） powertrain, low energy consumption, pure electric vehicle（PEV）, comprehensive gear shift schedule

摘要：

为了协调纯电动汽车动力性和经济性之间的矛盾，针对一种两挡变速系统，提出能够兼顾两种性能的综合换挡规律。首先，基于经济性驱动模式提出面向低能耗的需求转矩获取策略。在此基础上，制定两挡变速系统的最佳动力性换挡规律和最佳经济性换挡规律。以百公里加速时间和比能耗为目标，建立综合性能换挡规律优化模型，通过交叉粒子群算法求解得到换挡规律曲线。利用MATLAB/Simulink仿真平台对三种换挡规律的动力性能和经济性能进行对比分析，结果表明，综合性能换挡规律能够在动力性能方面逼近最佳动力性换挡规律，同时表现出很好的经济性能。

关键词: 两挡变速, 低能耗, 纯电动汽车, 综合换挡规律

CLC Number:

U469

LI Congbo, CHEN Ruijie, LI Yue, SHAN Yashuai. Comprehensive Gear Shift Schedule of a Two-speed PEV Powertrain for Low Energy Consumption[J]. China Mechanical Engineering.

李聪波, 陈睿杰, 李月, 单亚帅. [电动汽车稳定性控制]面向低能耗的纯电动汽车两挡变速系统综合换挡规律[J]. 中国机械工程.

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