Research on EMT Shifting Process of Pure Electric Commercial Vehicles Based on Dual‐Mode Control Strategy

ABSTRACT

This paper proposes a dual‐mode control strategy combining open‐loop pre‐control and closed‐loop correction to address power impact during the shifting process of Electric‐drive Mechanical Transmission (EMT) in pure electric commercial vehicles. The core contribution is threefold: a dynamic coupling model of accelerator pedal–motor torque–vehicle speed is established; quantified switching thresholds and weight distribution logic for dual‐mode control are defined; and a multi‐sensor fusion shifting state perception system is constructed for commercial vehicle operating conditions. Through CANoe‐Simulink co‐simulation and real‐vehicle experiments on a Dongfeng Huashen electric commercial vehicle, the proposed strategy reduces shifting time from 1.5 to 0.7 s (53% reduction), narrows torque fluctuation from ±180 to ±50 N m (72% reduction), and decreases longitudinal acceleration jerk from ≤ 15 to ≤ 8 m/s ³ (47% reduction), significantly improving shifting smoothness and providing an effective approach for EMT power management.