노면 경사도 추정 기법을 이용한 CVT 최적 정속 주행 제어 기법에 관한 연구

Estimation of longitudinal load such as road slope and rolling resistance is essential for precise cruise control of automotives. In this paper, using model based road slope estimation method with gravity sensor, precise longitudinal dynamic model of automotive vehicle is presented for vehicle auto-cruise control. Continuously Variable Transmissions (CVT) can cover a wide range of ratios and shift the engine operating points for a certain demanded power towards higher loads and lower speeds. This makes it possible to operate a combustion engine in more efficient working points than stepped. With this merit, fuel optimal cruise control by CVT ratio control is possible using precise longitudinal dynamic model using model based road slope estimation.