가솔린 기관의 배기밸브 타이밍 변화에 따른 촉매 가열 촉진에 관한 실험적 연구 An Experimental Study for Fast Warmup of Catalyst according to Exhaust Valve Timing Variation of an Gasoline
한국기계기술학회지
(韓國機械技術學會誌)
제11권 제1호
(2009.03)
pp.1-7
pp.1-7
한국기계기술학회
(Korean Society of Mechanical Technology)
초록
On cold start operation of a gasoline engine, a catalyst shows poor performance before it reaches activation temperature. Therefore, fast warmup of the catalyst is very crucial to reduce harmful emissions. In this study, an appropriate control strategy is investigated to increase exhaust gas temperature through changes of exhaust valve timing. An advance of exhaust valve timing decreases residual gas in cylinders due to decrease of valve overlap period. A control strategy of proper valve timing is suggested in order to achieve fast light-off of the catalyst and stable operation of the engine in a cold start and idle operation.
키워드
목차
Abstract 1. 서 론 2. 이론 해석 2.1 흡기 및 배기밸브 타이밍의 효과 2.2 가변밸브 타이밍 3. 실험 방법 및 결과 3.1 실험 장치 및 방법 3.2 냉시동 특성 실험장치의 구성 및 개략도 3.3 실험 결과 4. 결 론 참 고 문 헌
저자