Abstract：Taking the four-wheel wheel-driven electric bus as the research object, the slip rate was proposed as the evaluation index of the electronic differential, according to the working principle of the mechanical differential. The steering simulation experiment was carried out on the joint electric vehicle simulation platform established by trucksim and MATLAB/simulink, and the steering simulation experiment on the vehicle was carried out from the level of vehicle dynamics. The influence of the working conditions and the vehicle structure parameters on the electronic differential was studied. Through the simulation, the change rules of the inside and outside slip rate of the driven wheel changing with the vehicle speed, the steering wheel angle, the centroid height, the distance from centroid to the front axle and the change of the sprung mass were obtained. The research results show that: as the vehicle speed and steering wheel angle continue to increase, the slip rate of the four wheels increases; with the increase of the centroid height, the slip rate of left steering wheel increases and that of right steering wheel decreases; with the increase of the distance from centroid to the front axle, the slip rate of front axle wheel increases and that of rear axle wheel decreases; with the increase of the sprung mass, the slip rates of the four wheels all increase. Moreover, with the increase of vehicle speed and steering wheel angle, the increase of wheel slip rate is greater. The influence analysis of the obtained electronic differential changing with the working conditions and structure parameters is of guiding significance for the further study of the electronic differential control strategy.
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2020, Vol. 39 
