A study on the coordinated shift control strategy for a hybrid electric vehicle

作者：Liang, Junyi; Zhang, Jianlong; Yin, Chengliang

来源：Qiche Gongcheng/automotive Engineering, 2015, 37(12): 1371-1377.

• Automated mechanical transmissions
• Clutch engagements
• Clutch friction
• Control strategies
• Coordinated control strategy
• Fuzzy controllers
• Shift controls
• Torque fluctuation

A coordinated gear shifting control strategy for a hybrid electric vehicle equipped with automated mechanical transmission and a rear drive motor is developed to optimize vehicle jerk and clutch friction loss. With the control strategy, the shifting process is divided into engine speed active regulation, clutch engagement and engine speed recovery three phases. Fuzzy PID and fuzzy controllers are adopted to regulate engine speed and clutch engaging speed respectively with the torque fluctuation of powertrain compensated by electric motor. Simulation and bench test results indicate that the adoption of coordinated control strategy, though relatively extending shift time, can concurrently reduce the vehicle jerk and clutch friction loss, with a shift jerk limited within ±4 m/s3and only a little clutch friction loss, apparently improving the shift quality of vehicle.

• 出版日期2015
• 单位上海交通大学