TRANSIENT ANALYSIS AND CONTROL OF THE REGENERATIVE BRAKING SYSTEM USING HILS OF ELECTRO-HYDRAULIC BRAKE

Nowadays, various researches about eco-friendly vehicles such as hybrid electric vehicle, fuel cell vehicle and electric vehicle have been actively carried out. Since most of these green cars have electric motors, the regenerative energy technology can be used to improve the fuel economy and the energy efficiency of vehicles. The regenerative brake is an energy recovery mechanism which slows a vehicle by converting its kinetic energy into electric energy, which can be either used immediately or stored until needed. This technology plays a significant role in achieving the high energy usage. However, there are some technical problems in driving safety and ride comfort of the vehicles. In this paper, the Hardware-in-the-loop Simulation(HILS) of Electro-hydraulic Brake(EHB) is performed to analyze the characteristics of the regenerative braking system for fuel cell electric vehicle. The performance simulator of the fuel cell vehicle is developed and transient response characteristics of the regenerative braking system are analyzed in the various driving situations.