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2단연소방식이 디젤엔진의 연소성능 및 배출물 특성에 미치는 영향
정규수(Kyusoo Jeong),이동곤(Donggon Lee),연인모(In Mo Youn),노현구(Hyun Gu Roh),박성욱(Sungwook Park),이창식(Chang Sik Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The purpose of this study was to analyze the effect of two-stage injection on combustion performance and NO<SUB>x</SUB> reduction characteristics in a four cylinder diesel engine. The experiment was carried out under various first injection quantity and EGR rate at constant engine speed, load condition. In addition, the combustion and emission results were compared with the case of applied single injection timing at TDC. The experimental results show that NO<SUB>x</SUB> emissions of two-stage combustion strategy were clearly reduced, however, fuel consumption was slightly increased compared with single fuel injection. Also, soot emissions showed similar trends except of the 20% EGR rate.
바이오디젤 혼합연료를 적용한 4 실린더 커먼레일 디젤엔진에서 EGR율이 연소 및 배기특성에 미치는 영향
정규수(Kyusoo Jeong),이동곤(Donggon Lee),연인모(Inmo Youn),노현구(Hyungu Roh),이창식(Changsik Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This study describes the effect of EGR rate on the combustion and emissions characteristics of a four cylinder CRDI diesel engine using biodiesel(Soybean oil) blended diesel fuel. The experimental fuel is composed of 30% biodiesel(Soybean) and 70% ULSD(Ultra low sulfur diesel) by volumetric ratio. The experiment of engine emissions and performance characteristics were performed under the various EGR rate. The experimental results show that ignition delay was extended with increasing EGR rate, and maximum combustion pressure and heat release gradually were decreased. Comparing biodiesel blended fuel and ULSD, the injection quantity of biodiesel blended fuel was more increased than ULSD. The emission results show that NOx emission of biodiesel blended fuel with increasing EGR rate shows more higher than that of ULSD. However, in the case of biodiesel blended fuel, HC, CO and soot emissions were decreased than that result of ULSD.