Series HEV Bus에서의 발전 시스템 최적화에 관한 연구

For improving fuel economy and emissions, many studies of HEV have been conducted. However, most of studies of HEV are concentrated on parallel or power split type HEV. It should be noted that series type HEV has some advantages comparing with that of parallel or power split type. One is that the engine is operated in high efficiency area since the engine and drive shaft are decoupled. Nevertheless of that advantages, optimization about powertrain system of series HEV was not considered precisely. So, in this study, optimization of generation system of series HEV was conducted based on series HEV bus. The main objective is to simulate and compare the fuel economies of conventional generation system and system which is considering about engine and generator simultaneously. The simulation algorithm used in this study is based on the optimal control theory, Dynamic Programming. Optimized generation system shows improved fuel economy about 2% comparing with non optimized generation system.