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자료유형
학술대회자료
저자정보
저널정보
한국자동차공학회 한국자동차공학회 춘 추계 학술대회 논문집 한국자동차공학회 2007년 춘계학술대회 논문집 Volume I
발행연도
2007.6
수록면
155 - 161 (7page)

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초록· 키워드

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The cycle-to-cycle variability and potential sources of unburned hydrocarbon (UHC) emissions are examined in a single-cylinder, light-duty diesel test engine operating in low-temperature combustion regimes. A fast flame ionization detector (FID) was employed to examine both cycle-to-cycle emissions behavior. A standard suite of emissions measurements, including CO, CO₂, NO<SUB>x</SUB> and soot, was also obtained. Measurements were made spanning a broad range of intake O₂ concentrations-to examine the UHC behavior of dilution-controlled combustion regimes-and spanning a broad range of injection timings-to clarify the behavior of increased UHC emissions in late-injection combustion regimes. Both low- and moderate-loads were investigated. The cycle-resolved UHC data showed that the coefficient of variation of single-cycle UHC did not increase with increases in UHC emissions as either O₂ concentration or injection timing was varied. Additionally, the crank-angle-resolved UHC measurements were coupled with a I-D engine model to examine the variation of exhaust mass flow rate of UHC within each cycle. The results showed that most of the UHC mass exited the cylinder during the latter part of the exhaust process, and that UHCs originating from cylinder wall and piston top quench layers are likely of greater importance than UHCs emitted from quench layers along the head.

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Abstract
1. 서론
2. 실험장치
3. 실험방법
4. 실험결과
5. 결론
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UCI(KEPA) : I410-ECN-0101-2009-556-016771331