关键词: 车辆工程;电动汽车;差动助力转向;仿真分析;电动轮;差动扭矩

Abstract:

A novel power assisted steering system was proposed for the electric vehicle(EV) with electric motored wheels which features the independent driving of individual wheel. With focus on the differential assisted steering(DAS) system, its working principles were introduced and its feasibility was discussed. A dynamics model for the vehicle including the steering system was built based on Matlab/Simulink. The characteristic curve of the target torque distribution and the control algorithm for the torque output of left and right steering wheels were presented and simulated. The results show that the proposed DAS system meets the demands of the EV with electric motored wheels on the steering maneuverability and the road feel during driving. So, it may be applied on the 4wheel independent motored EV on condition that the traditional mechanical structure of the steering system is maintained. The proposed DAS system enhances the performance of the whole EV with motored wheels and is characterized by reduced cost and complexity.

Key words: vehicle engineering;electric vehicles(EV);differential assisted steering;simulation analysis;electricmotored wheel;differential torque