Optimization of gear shift schedule for electric buses equipped with 4-AMT using dynamic programming

In this paper, an optimization method of gear shift schedule for electric buses equipped with 4-AMT is proposed based on Dynamic Programming (DP) to improve the energy economy of the vehicle. A gear shift schedule that can be used in real-vehicle is extracted based on analysis of the obtained optimal gear shift points by DP approach in Chinese typical urban driving-cycles. Compared to the traditional two-parameter gear shift schedule in both simulation and real vehicle platform, the extracted gear shift schedule is proved to improve the energy economy of the electric vehicles (EVs) obviously.