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디젤엔진에서 EGR 온도 변화에 따른 배기 특성에 관한 연구
윤여태(Yu-tae Yoon),박우영(Woo-young Park),강병무(Byung-mu Kang),염정국(Jeong-kuk Yeom),정성식(Sung-sik Chung),하종률(Jong-yul Ha) 한국자동차공학회 2002 한국자동차공학회 지부 학술대회 논문집 Vol.2002 No.3
Recently, an important goal in diesel engine research is the development of a means to reduce the emissions of NOx and Soot.<br/> Exhaust gas recirculation(EGR) is one of the most effective techniques currently available for reducing NOx emission in internal combustion engines. Since the exhaust gas temperature is higher than that of the intake air, EGR raises the inlet charge temperature and reduces the inlet charge mass.<br/> This work is to review the potential of cooled EGR to reduce the exhaust emissions, particularly NOx emission. Cooled EGR makes possible lower NOx and Soot emissions than hot EGR due to the increase of inlet charge mass. Also, this research used dual fuel stratified injection system because that is the method of the simultaneous reduction of soot and NOx.<br/> In the present study, the results show NOx can be reduced with a minimum penalty of Soot particle emission with cooled EGR. The use of Cooled EGR and dual fuel stratified injection system is, therefore, believed to be most effective in improving exhaust emissions.<br/>