지원사업
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
- 2013.5
- 수록면
- 406 - 412 (7page)
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초록· 키워드
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Combustion and emission characteristics were investigated in a compression ignition engine with dual-fuel strategy using di-metyl ether (DME) and gasoline. DME was directly injected into the cylinder and gasoline was injected into the intake manifold during the intake stroke. The effect of operating parameters such as DME injection timing, injection pressure and intake oxygen concentration on combustion and emissions were investigated.
As DME proportion was decreased with the increased portion of gasoline, the combustion efficiency was decreased but thermal efficiency was significantly increased. Unburned hydrocarbon was increased from increased over-lean mixture and crevice region. Combustion was dominated by the premixed combustion with the increased portion of gasoline so the combustion duration was shortened. It affected the quasi-constant volume combustion and the reduced heat transfer loss. Nitric oxides (NOx) emissions were decreased with increased gasoline proportion due to low combustion temperature from lean premixed combustion even with decreased combustion duration. Soot emission was nearly aero regardless of DME proportion and injection timing. When the DME injection pressure increased, NOx emission was monotonically increased with improved thermal efficiency. With increased EGR rate and decreased intake oxygen concentration, the thermal efficiency of dual-fuel combustion was not decreased much but NOx emissions were significantly reduced. This was attributed to the increased heat capacity of the in-cylinder charge resulting in decreased combustion temperature.
As DME proportion was decreased with the increased portion of gasoline, the combustion efficiency was decreased but thermal efficiency was significantly increased. Unburned hydrocarbon was increased from increased over-lean mixture and crevice region. Combustion was dominated by the premixed combustion with the increased portion of gasoline so the combustion duration was shortened. It affected the quasi-constant volume combustion and the reduced heat transfer loss. Nitric oxides (NOx) emissions were decreased with increased gasoline proportion due to low combustion temperature from lean premixed combustion even with decreased combustion duration. Soot emission was nearly aero regardless of DME proportion and injection timing. When the DME injection pressure increased, NOx emission was monotonically increased with improved thermal efficiency. With increased EGR rate and decreased intake oxygen concentration, the thermal efficiency of dual-fuel combustion was not decreased much but NOx emissions were significantly reduced. This was attributed to the increased heat capacity of the in-cylinder charge resulting in decreased combustion temperature.
목차
Abstract
1. 서론
2. 실험 장치 및 방법
3. 실험 결과 및 토의
4. 결론
References
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UCI(KEPA) : I410-ECN-0101-2014-550-002586330