Feasibility Study of High Speed Wheel Torque Control and its Effects on Vehicle Dynamics

Recent performance of braking devices has been improved for catching up with new vehicle features such as HEV (Hybrid Electric Vehicle), VDM (Vehicle Dynamics Management) and so on. This is the reason why new concept systems like EHB (Electric Hydraulic Brake), are introduced. In near future, more enhancement of braking performance (ex. response, accuracy etc.) will be required. In this paper we studied feasibility of very high-speed braking torque control. We designed high-speed electrical brake actuators, and tested on an actual vehicle. In this test we found high-speed torque control could make stable slip-state at any slip-rate and had good response for changes of road surface conditions. Finally we discuss about its effects on vehicle dynamics and future potential.