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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1992.6
- 수록면
- 21 - 29 (9page)
이용수
초록· 키워드
오류제보하기
In spark ignition engines, one of the best methods to improve efficiency and power is increasing compression ratio of the engine.
As compression ratio increses. characteristic of combustion changes. Combustion phenomena can be reprensented by variables calculated from the pressure measurement which are maximum pressure,crank angle at maximum pressure, indicated mean effective
pressure(IMEP), etc. Also anaIysed using variables such as initial flame developing period and rapid burning period. In our experiment, we have increased compression ratio by reducing the thickness of gasket and reducing the volume of combustion chamber with modification of cylinder head without significant change in the shape of combustion chamber. We have increased the compression ratio to 6.1, 6.25, 6.78, respectively from the original 5.7, and for each compression ratio variables mentioned above were measured for 100 cycles at 2400,2600,2800,3000 RPM. Results show that the increase in compression ratio causes the increase in the maximum pressure and the decrease in the combustion period. IMEP, however, increases through compression ratio of 6.1 to 6.25, while at 6.78, it decreases radically due to the lack of cooling effect. Increase in compression ratio also causes decrease in cycle-by-cycle variation and increase in combustion stability.
As compression ratio increses. characteristic of combustion changes. Combustion phenomena can be reprensented by variables calculated from the pressure measurement which are maximum pressure,crank angle at maximum pressure, indicated mean effective
pressure(IMEP), etc. Also anaIysed using variables such as initial flame developing period and rapid burning period. In our experiment, we have increased compression ratio by reducing the thickness of gasket and reducing the volume of combustion chamber with modification of cylinder head without significant change in the shape of combustion chamber. We have increased the compression ratio to 6.1, 6.25, 6.78, respectively from the original 5.7, and for each compression ratio variables mentioned above were measured for 100 cycles at 2400,2600,2800,3000 RPM. Results show that the increase in compression ratio causes the increase in the maximum pressure and the decrease in the combustion period. IMEP, however, increases through compression ratio of 6.1 to 6.25, while at 6.78, it decreases radically due to the lack of cooling effect. Increase in compression ratio also causes decrease in cycle-by-cycle variation and increase in combustion stability.
목차
Abstract
1.서론
2.실험 장치 및 실험 방법
3.단일영역 열방출량 계산법을 이용한 엔진의 연소 특성 변화
4.실험 결과 및 고찰
결론
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UCI(KEPA) : I410-ECN-0101-2009-556-014102701