|Title||장진영, 배충식, “DME 예혼합 압축 착화 엔진에서 밸브 양정과 개폐시기가 내부 배기가스 재순환과 연소에 미치는 영향,” 한국자동차공학회 논문집, vol. 17, No. 4, pp93-100, 2009. 7.|
장진영, 배충식, “DME 예혼합 압축 착화 엔진에서 밸브 양정과 개폐시기가 내부 배기가스 재순환과 연소에 미치는 영향,” 한국자동차공학회 논문집, vol. 17, No. 4, pp93-100, 2009. 7.
Intake/exhaust valve timing and exhaust cam lift were changed to control the internal exhaust gas recirculation (IEGR) and combustion phase of homogeneous charge compression ignition (HCCI) engine. To measure the IEGR rate, in-cylinder gas was sampled during from intake valve close to before ignition start. The lower exhaust cam made shorter valve event than higher exhaust cam and made IEGR increase because of trapping the exhaust gas. IEGR rate was more affected by exhaust valve timing than intake valve timing and increased as exhaust valve timing advanced. In-cylinder pressure was increased near top dead center due to early close of exhaust valve. Ignition timing was more affected by intake valve timing than exhaust valve timing in case of exhaust valve lift 8.4 mm, while ignition timing was affected by both intake and exhaust valve timing in case of exhaust valve 2.5 mm. Burn duration with exhaust valve lift 2.5 mm was longer than other case due to higher IEGR rate. The fuel conversion efficiency with higher exhaust valve lift was higher than that with lower exhaust valve lift. The late exhaust and intake maximum open point (MOP) made the fuel conversion efficiency improve.
|Previous||이진욱, 배충식, Alessandro Schonborn, Nicos Ladommatos, “디젤연소가능 청정연료 (ULSD, Bio-Diesel, DME)엔진의 극미세입자 정량화 및 촉매 영향”, 한국자동차공학회 논문집, vol. 17, No. 3, pp81-89, 2009. 5.|
|Next||심의준, 한상욱, 장진영, 박정서, 배충식, “과급을 이용한 저온 디젤 연소의 운전영역 확장 및 배기 배출물 저감”, 한국자동차공학회 논문집, vol. 17, No. 5, pp31-38, 2009. 9.|