압축비 변화가 경유-CNG 혼소 엔진의 성능 및 연소 특성에 미치는 영향

유경현; 원종근

doi:10.9726/kspse.2019.23.4.039

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저널정보

한국동력기계공학회
동력시스템공학회지 학술저널
한국동력기계공학회지 제23권 제4호
2019.8 39 - 48 (10page)
DOI : 10.9726/kspse.2019.23.4.039

저자정보

유경현 (군산대학교)
원종근 (군산대학교)

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2019

압축비 변화가 경유-CNG 혼소 엔진의 성능 및 연소 특성에 미치는 영향

유경현 , 원종근 동력시스템공학회지 2019.08 학술저널

디젤기관에서 압축비의 변화가 경유-CNG 혼소 특성에 미치는 영향

유경현 , 원종근 , Nadya. N. Mawuntu 한국자동차공학회 춘계학술대회 2019.05 학술대회자료

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This paper describes the effects of compression ratio on the performance and emission characteristics of diesel-CNG dual fuel combustion system in a single cylinder direct injection diesel engine. Engine tests were performed with the compression ratios (CR) of 15 and 18 at an engine speed of 1,500 rpm and various engine loads. This study showed that the peaks of cylinder pressure and heat release rate of the dual-fuel combustion decreased as the CR decreased. The ignition delay period of pilot fuel at the CR 15 was increased more than that at the CR 18. The pilot injection timing of CR 15 for the maximum power was advanced compared to the CR 18. The engine operation was stable with COVimep of 3% at the CR 15. Smoke with dual fuel combustion was decreased compared to those with single fuel conventional diesel combustion, and it was also decreased as the CR decreased. Compared to the CR 18, NOx emissions with the CR 15 were increased at middle-load conditions and CO and THC were more exhausted under low-load conditions.

#Compression ratio #Diesel engine #Dual fuel combustion #CNG #Exhaust emissions