system for EV, HEV and FCV [12] [15] [16]. In brake system Abstract . Due to the introduction of electrical design for EV, HEV and FCV, two basic concern are (1) regenerative braking, the structure, design and control of properly applying braking force on front and rear wheels to braking system of an electric vehicle (EV), hybrid electrical quickly reduce the vehicle speed, and meanwhile, maintaining vehicle (HEV) and fuel cell vehicle FCV) is quite different the vehicle traveling direction stable and controllable through from the pure mechanical braking system of conventional the steering wheel on various road conditions [13][14],.and (2) vehicles. Desirable braking performance not only recovering the braking energy as much as possible in order to guarantee to quickly stop the vehicle and maintain the improving the energy utilization efficiency, especially while traveling direction stable and controllable, but recapture driving with stop-go driving pattern in urban areas [17]. the braking energy as much as possible on various Thanks to the duel directional energy flow capability of electric conditions of road.propulsion system in EV, HEV and FCV, recovery of the In this paper, the braking energy characteristics on vehicle braking energy becomes possible through regenerative braking. speed and braking power in typical urban driving cycles have Nevertheless, safety issue is still the first concern in vehicle been investigated. The results provide strong supports to the braking system design. Sufficient and controllable braking design and control of such hybrid braking system. Two hybrid force is absolutely required for heavy braking. Thus, a reliable braking systems have been introduced. One is parallel hybrid mechanical braking system is still required. Consequently, such braking system, which has a simple structure and control. The a ... 'other is fully controllable hybrid braking system. Two typical a.brakein systemw regenerati andmechan control strategies for this system have been established. One emphasizes optimal braking performance and the other on system, there are various configurations and controls for the optimal braking energy recovery hybrid braking system. In this paper, the braking characteristics in typical urban Index Terms-Hybrid brake system, EV, HEV, FCV, driving cycle have been investigated, which mainly include the Regenerative braking, Braking energy, Design Principle. Control braking energy distribution along with the vehicle speed and braking power. The data obtained are very helpful in the design I. INTRODUCTION and control of the electric regenerative breaking in order to E Lectic, hybrid electric and fuel cell vehicles have been recovery as much braking energy as possible. This paper has Lwidely recognized as the most promising technologies of also introduced tow hybrid braking systems and their next generation vehicles that have high energy utilization corresponding design and control principles. One is the parallel efficiency and very low emissions. The research and hybrid brake, whi...
