냉간 아이들시 Cam Phasing 최적화에 의한 배출가스 저감에 관한 연구

The fuel and spark control of gasoline engines at cold idle is a dominant factor to meet the exhaust emission regulations being reinforced recently. The engine control of cold idle phase has to be optimized to get low emissions enough to meet the regulations and good stability customers are satisfied with. In this study, we improved engine stability and reduced exhaust emissions by optimizing cold idle cam phasing after engine start.