| 제목 |
가솔린 직접분사 엔진의 흡기과급이 성층화 연소에 미치는 영향 |
| 분야 |
엔진 및 연소 |
| 언어 |
Korean |
| 저자 |
조남효(고등기술연구원), 김미로(고등기술연구원), 박형철(고등기술연구원) |
| Key Words |
Gasoline direct injection engine(가솔린 직접분사식 엔진), Boosted intake pressure(흡기과급), Combustion stability(연소안정성), Stratified combustion(성층화 연소), In-cylinder CFD(실린더 내부 유동해석) |
| 초록 |
The effects of pressure charge on combustion stability and emissions have been anal using a GDI single engine. A late injection mode of stratified condition at the air-fuel ratio of 40: I for 1200-2400 rpm was tested while the boosted pressure ratio was increased up to 1.5: 1. In-cylinder CFD analysis was also performed for better understanding of in-cylinder flow and fuel spray behavior. With a higher boosted pressure ratio the IMEP was increased greatly due to the increased engine load, and the ISFC was improved by more than 10% at all engine speeds. The regime or stable stratified combustion was extended to a higher engine speed, but the spark ignition angle had to be more advanced for stable combustion. The emissions or ISHC and ISNOx did not show a particular trend for the increased engine speed but a general trend of lower ISHC and higher ISNOx for a gasoline engine. {{br}} |
| 원문(PDF) |
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