Abstract

This paper describes a braking control method that is suitable for front-and-rear-wheel-independent-drive-type electric vehicles (FRID EVs). The research on FRID EVs has been accelerated as these vehicles are considered the next-generation electric vehicles (EVs). The braking control proposed in this paper is performed in cooperation with the mechanical braking control and the electric braking control under various load conditions. The proposed cooperative braking control method can realize a stable braking control on low-friction-coefficient (μ) roads; this stable control cannot be realized by the conventional braking control methods. An outstanding braking performance when the proposed braking control method is applied to the FRID EV is demonstrated through simulations and a comparison of the performance of the FRID EV with that of the other EVs. Moreover, the effectiveness of the proposed braking control method is verified through experiments on an official running test course with low-μ roads using a prototype FRID EV with practical specifications.

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