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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Front-and-Rear-Wheel-Independent-Drive-Type Electric Vehicle (FRID EV) with Compatible Driving Performance and Safety

Graduate School of Tokyo Metropolitan University 6-6, Asahigaoka, Hino-shi, Tokyo, 191-0065 Japan
World Electr. Veh. J. 2009, 3(1), 17-26; https://doi.org/10.3390/wevj3010017
Published: 27 March 2009
PDF [2092 KB, uploaded 11 May 2018]

Abstract

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 and safety. The FRID EV development work has included studying the driving performance and safety of all types of propulsion systems. 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. Three functions which EVs developed until now could not have are shown here analytically and experimentally. The first is the failsafe function under which vehicles continue running without any unexpected sudden stops, even if one of the propulsion systems fails. The second is 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 third is the function for ensuring safe running on bad roads, i. e., low µ-roads like frozen roads, by simultaneously controlling slip ratios of the front and rear wheels in consideration of load movement. These are functions are unique to the FRID EV and they have not be realized previously in any gasoline engine-powered car, hybrid car or conventional electric vehicle.
Keywords: safety, EV (electric vehicle); lithium battery; electric drive; control system; diagnosis; motor; vehicle performance; braking; BEV (battery electric vehicle); failsafe; slip; front and rear wheels safety, EV (electric vehicle); lithium battery; electric drive; control system; diagnosis; motor; vehicle performance; braking; BEV (battery electric vehicle); failsafe; slip; front and rear wheels
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mutoh, N. Front-and-Rear-Wheel-Independent-Drive-Type Electric Vehicle (FRID EV) with Compatible Driving Performance and Safety. World Electr. Veh. J. 2009, 3, 17-26.

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