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김태섭(T.S Kim),박정근(J.K Park),백중현(J.H. Baek),이동인(D.I Lee) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of Euro4 regulation. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of high NOx concentraion. Second method, the conentraiton of PM produced by high efficiency combustion sufficiently meets the requirement of regulation. and NOx generated in this process can be removed by SCR system. While it has better fuel efficiency than the first method mentioned above. urea supply infrastructure is demanded. In this paper summarized the contents which attain the efficiency of the optimum target Euro4 based on Euro3 engine using design of experiment. This paper selected wider spray angle and changed bowl shape for optimize combustion. So, Injector sample had two types. Also Piston bowl spahe had two types. Then, it obtains low PM ami high NOx. The NOx concentration is belowed target point that is considered the reduction by SCR system. At last, it is satisfied for emission target.
디젤기관에서 산화촉매장치에 의한 배기가스 저감에 관한 이론적 연구
한영출(Y. C. Han),김종춘(J. C. Kim),김태섭(T. S. Kim) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.4
Among aftertreatment devices which reduce exhaust gas of diesel engine, diesel oxidation catalyst(DOC) with high reduction efficiency for gaseous matter add particulate matter is now studied actively. In this study, a transient one -dimensional model developed to simulate the thermal and conversion characteristics of adiabatic monolithic converters operating under warm<br/> -up conditions is presented. This model takes into account the gas -solid heat and mass transfer, axial heat conduction, chemical reactions and the related heat release.<br/> The model has been used to analyze the transient response of an axisymmetric catalytic converter during a warm-up as a function of catalyst design parameters and operation conditions in order to observe their effects on the lightoff behaviour.<br/> The experimental test was carried out 2400 cc light diesel engine with DOC<br/>