A study on gear shifting schedule for 2-speed electric vehicle using dynamic programming

For a novel electric vehicle equipped with 2-speed Automated Manual Transmission (AMT), an optimal gear shifting schedule is designed to improve the energy economy of the vehicle. Given a driving cycle, the global optimal transmission ratio control sequence can be derived from Dynamic Programming algorithm. Then the optimal gear shifting schedule is achieved from the map of the optimal gear operational points of multiple driving cycles. Compared with some other selected gear shifting schedules, it is shown that the optimal shifting schedule improves energy consumption economy by about 5.5%.