DEVELOPMENT AND APPLICATION OF THE MODULE STRUCTURE OF IN-WHEEL-MOTOR AND DOUBLE-WISHBONE SUSPENSION WITH TORSION BAR

Chen Xinbo  Wan Gang  Li Yan  Wang Wei

(School of Automobile, Tongji University, Shanghai 201804)

Abstract: In order to cut down the manufacturing cost of four in-wheel-motor drive electric vehicle, it is an effective way to reduce the items of parts and components and simplify the structure of chassis. Based on the optimum design of the suspension and steering mechanism, a new double-wishbone suspension mechanism with zero toe-in fluctuation is presented, and then a module structure composed of double-wishbone- suspension, torsion bar and in-wheel-motor is developed. Thus same structure of the suspension-in-wheel-motor module can be used in the front and rear wheel, and the results have successfully been applied in the development of the Spring Sunshine, which is a new type of four in-wheel-motor drive fuel cell vehicle with steer-by-wire.

Key words: Double-wishbone suspension  Spatial linkage  In-wheel-motor  Steer-by-wire  Four wheel drive fuel cell vehicle

CLC No: U46

国家863计划资助项目(2003AA50100). Received 20050210, received in revised form 20050820