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이천환(Chunhwan Lee),이광철(Kwangchul Oh),김덕진(Deokjin Kim),하태권(Taewon Ha),이경복(Kyungbok Lee),이춘범(Chunbeom Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
As it is known that the small size particles emitted from diesel engine are more harmful to human body, the concern about the emission of ultra-fine particles is growing. Then the total-Dumber-emission characteristics of nano PM that will be added to emerging regulation in the future are important targets of new coming technology to develope Diesel Particulate Filter (DPF) system. In this paper, the nano PM emission characteristics in according with DPF porosity were evaluated and analyzed by Electric Low Pressure Impactor (ELPI) and Condensation Particle Counter (CPC). The total number of nano PM had been measured in different two case of DPF status ,those are, a PM loading case in filter and a cleaning case after regeneration. From the results of this study, the large difference of filtration efficiency of two cases was shown at low exhaust gas temperature(<400℃). And the more number of nano particles were emitted from 50% porosity DPF than 40% porosity DPF. But all of other experimental results including PM weight and engine performance were not different except the total number emission characteristic of nano PM.