승용 차량의 제동 성능 예측 프로그램 개발

초록

The need to know the braking performance in vehicle has been acknowledged for many years since the invention of vehicles. Since there are numerous design variables as well as nonlinearities in the braking system, it is not easy to predict the braking performance accurately. In this paper, a computation program is developed to estimate the braking performance numerically. This synthetic braking performance program is dealing with pedal force, pedal travel and deceleration by including all braking parts such as master cylinder, booster, valves, brake pads, rotors, and hoses. In order to improve the accuracy of program, the semi-empirical model of braking system is developed by using the empirical test data of pad compression, hose expansion and friction coefficient between pads and rotors. The performance of estimation accuracy is evaluated by comparing with actual vehicle test results. The developed program is easy to operate for the engineers of brake system in developing new vehicles by incorporating the graphical presentation as well as exporting data in Microsoft Excel format.