关键词: 纯电动装载机, 换挡策略, Ｓｉｍｕｌｉｎｋ, 自动代码生成

Abstract: Aiming at the transmission system of pure electric loader, the hydraulic torque converter of traditional diesel power loader is cancelled, and the electro-hydraulic shift system is adopted to control the work of two-gear clutch. Based on the speed and torque information returned by the motor controller and the speed information of the transmission output shaft, the shift strategy is formulated. The motor control mode is switched by the vehicle controller, and the electromagnetic valve action of the gear actuator is controlled, so as to realize the smooth shift of the gear of the pure electric loader. Based on Simulink, the shift control algorithm model of pure electric loader was built, and the program that can be applied to the vehicle controller was generated by Simulink automatic code generation technology. The test results show that the proposed control strategy can significantly shorten the shift time and improve the shift comfort, and the shift time can reach 0.66s. When changing from first gear to second gear, the fluctuation value of the vehicle speed is 1.4 km/h.