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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.