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A new control algorithm of a wedge brake system has been developed. The proposed control algorithm is based on the position control and current control of electronic wedge brake(EWB). The EWB control system in rear wheel has both active braking functions like ABS and ESC and convenient function such as EPB. In this paper, development of control algorithm was performed using hybrid brake system(HBS) which consists of hydraulic brake in front wheel and electronic brake in rear wheel. At first, the configuration of EWB system is explained. Next, structure of electronic control in HBS is explained. And then ABS/ESC/EPB control algorithms are shown. ABS control algorithm has wheel slip calculation, wheel error calculation, wheel slip control, position control, current control, and duty control. ESC algorithm consists of yaw error calculation, yaw moment control, wheel slip control, position control, current control, and duty control.

New brakes have been developed on the base of an electric powered mechanism with self-reinforcement effect. Electro-mechanical brakes need a big power source to generate enough braking force to stop a vehicle. Most vehicle companies do not provide 42V-based electric power system that could be a solution to this matter currently. To use electro-mechanical brakes in the conventional 12V circumstance, a wedge mechanism with self-reinforcement effect can be adopted to reduce energy consumption of the brake systems. A new electronic wedge brakes that have the feature of cross-wedge and use no roller were proposed in this paper. Cross wedge mechanism was introduced for even distribution of braking force. Rollers that can produce higher braking force amplification were not used because it is inadequate for mass production due to its weakness to corruption by small particles.