Abstract

The combustion and emission characteristics of a direct injection CI engine fuelled with DME(Dimethyl Ether) and diesel fuel were compared at idle engine speed(800 rpm) with various injection parameters. An optical single cylinder diesel engine equipped with a common-rail fuel injection system was constructed to investigate combustion processes of DME and diesel fuel. The combustion images were recorded with a high-speed video camera system. The results demonstrated that the DME-fuelled engine was superior to the conventional diesel engine in terms of engine performance and emissions. The optimal injection timing of DME was located around IDC(Top Dead Center), which was roughly same as that of diesel fuel. As the injection timing was advanced much earlier than TDC, NOx (Nitric Oxides) level increased considerably. NOx emission of DME was equal or a little higher than that for diesel fuel at the same injection pressure and timing because of higher evaporation characteristics of DME. Throughout all experimental conditions, DME did not produce any measurable smoke level.

주제어

#커먼레일 분사장치   #디젤  

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참고문헌 (7)

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이 논문을 인용한 문헌 (3)

1. Sung, Yong-Ha ; Jung, Kil-Sung ; Choi, Byung-Chul ; Lim, Myung-Taeck 2007. "HCCI Combustion of DME in a Rapid Compression and Expansion Machine" 한국자동차공학회논문집 = Transactions of the Korean Society of Automotive Engineers, 15(2): 8~14  원문보기 상세보기
2. Baek, Cheul-Woo ; Yoon, Hyeon-Sook ; Yeom, Ki-Tae ; Jang, Jin-Young ; Bae, Choong-Sik 2007. "The Effects of Hydrogen on DME HCCI Combustion" 한국자동차공학회논문집 = Transactions of the Korean Society of Automotive Engineers, 15(2): 15~21  원문보기 상세보기
3. Chung, Jae-Woo ; Kim, Nam-Ho ; Kang, Jung-Ho ; Park, Sang-Wook ; Lee, Ho-Kil ; Choi, Seung-Kyu 2009. "A Study on the DME Application Performance of a High Pressure Fuel Pump for an Electric Controlled Common-rail Compression Ignition Engine" 한국자동차공학회논문집 = Transactions of the Korean Society of Automotive Engineers, 17(2): 132~140  원문보기 상세보기