Driving performance on low friction coefficient roads which the front-and-rear-wheel-independent-drive-type-electric vehicle (FRID EV) has

This paper focuses on a front-and-rear-wheel-independent-drive-type-electric vehicle (FRID EV) which is being developed as the next generation EV with ideal characteristics of driving performance. Since the FRID EV has propulsion systems which can control the driving and braking torques of the front and rear wheels independently, various outstanding and indispensable functions are produced. The FRID EV has the function for performing efficient acceleration and deceleration on all roads by suitably distributing the driving or braking torques to the front and rear wheels according to the road surface conditions. The function enables safe running on slippery roads, i. e., low ¿-roads like frozen roads, by simultaneously controlling slip ratios of the front and rear wheels in consideration of load movement. The driving performance on bad roads is clarified here through experiments using a prototype FRID EV in the running test center.