|Title||염기태, 장진영, 배충식. “LPG 예혼합 압축 착화 엔진의 배기가스 및 연소 특성”, 한국 자동차 공학회 자동차공학회 논문집, vol. 14, No. 4, pp149-156, 2006. 7.|
염기태, 장진영, 배충식. “LPG 예혼합 압축 착화 엔진의 배기가스 및 연소 특성”, 한국 자동차 공학회 자동차공학회 논문집, vol. 14, No. 4, pp149-156, 2006. 7.
This paper investigates the steady state combustion characteristics of LPG homogeneous charge compression ignition (HCCI) engine with variable valve timing (VVT) and di-methyl ether (DME) direct injection, to find out the benefits in exhaust gas emissions. VVT is one of the attractive ways to control HCCI engine. Hot internal residual gas which is controlled by VVT device, makes fuel is evaporated easily, and ignition timing is advanced. Regular gasoline and liquefied petroleum gas (LPG) were used as main fuel and di-methyl ether (DME) was used as ignition promoter in this research. Operating range and exhaust emissions were compared LPG HCCI engine with gasoline HCCI engine. Operating range of LPG HCCI engine was wider than that of gasoline HCCI engine. The start of combustion was affected by the intake valve open (IVO) timing and the λTOTAL due to the latent heat of vaporization, not like gasoline HCCI engine. At rich operation conditions, the burn duration of the LPG HCCI engine was longer than that of the gasoline HCCI engine. CAD at 20% and 90% of the mass fraction burned were also more retarded than that of the gasoline HCCI engine. And carbon dioxide (CO2) emission of LPG HCCI engine was lower than that of gasoline HCCI engine. However, carbon oxide (CO) and hydro carbon (HC) emission of LPG HCCI engine were higher than that of gasoline HCCI engine.
|Previous||염기태, 장진영, 배충식, “DME를 착화촉진제로 사용한 가솔린 예혼합 압축 착화 엔진의 연소 특성”, 한국 자동차 공학회 자동차공학회 논문집, vol.14, No. 3, pp178-185, 2006. 5.|
|Next||박세익, 국상훈, 배충식, 김장헌, “디젤 예혼합 압축착화 엔진에서 배기가스 재순환과 과급의 영향,” 한국자동차공학회 논문집, vol. 14, No. 5, pp58-64, 2006. 9.|