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EMISSIONS(CO/NOx/PM) 대응을 위한 EMS 매핑인자 및 촉매 설계인자 최적화 기법
백기현(Ki-Hyun Baek),최창은(Changeun Choi),김종기(Jong Ki Kim),최인락(Innak Choi),김기영(Ki Young Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Globally, the emission regulations for diesel vehicles are getting more stringent. Also, a trend that car makers reduce vehicle loads to enhance the fuel economy leads to an increase of unwanted emissions like HC and CO. As results, the production costs for exhaust catalytic converter rise by augmentations of its volume and the quantity of noble metals. Under the development process of a vehicle (EURO-Ⅳ spec.) with V6-type 3.0L diesel engine, a DoE technique revised from general DFSS method was applied in order to cut down catalyst costs and to reduce the emissions (i.e., HC/CO/NOx/PM). The optimizations by the revised DoE were successfully performed with EMS (ECU Data) mapping parameters (i.e., EGR-rate, Swirl-rate, and double pilot injection timing) and for catalyst design parameters (i.e., catalyst metal(Pt/Pd) compositions and monolith volume). While saving about 20% out of the total Pt initial loading and each 25% volume from the initial catalyst specifications, the CO and PM emissions were reduced about 40% and 6%, respectively.