ER 밸브 압력 모듈레이터를 이용한 ABS 차량의 제동력 배분 제어

This paper describes the feasibility of improving the braking performance of sports utility vehicle (SUV) by controlling rear wheels with electrorheological (ER) valve pressure modulator. Braking force distribution generated by controlling the slip of rear wheels makes suitable braking force according to the variation of the vehicle load. As a first step, principal design parameters of the ER valve and hydraulic booster are appropriately determined by considering the braking pressure variation during the braking system operation and then an electrically controllable pressure modulator is constructed. The governing equation for ER valve pressure modulator is derived and the system modeling for a rear wheel slip and yaw rate control is composed. Computer simulation shows that the proposed baking system can eliminate the braking distance increase in a laden condition and the steering stability during cornering is improved.