• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.5
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• pp.499-504
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• 2010

It is important to determine the exact soot mass in a DPF system in order to control the timing of PM regeneration. The soot mass accumulated in a filter can be estimated from the pressure drop in the filter and the exhaust gas flow rates. In this study, the soot index is defined as the pressure drop in the DPF divided by the pressure drop in a DOC. An effective signal processing method for determining the soot index is proposed; the results yielded by this method indicate good correlation between the soot index and the amount of soot loaded into the filter for both steady-state and transient-state operating conditions in a 3L diesel engine for passenger vehicles.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.327-328
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• 2003

경유자동차는 연료 특성상 매연을 포함한 입자상물질을 다량 배출하고 있으며, 이러한 디젤입자상물질은 인체에 유해한 발암성 및 돌연변이원성 물질들을 함유하고 있기 때문에 호흡 등을 통한 인체 유입시 건강에 매우 유해하다. 그러므로 디젤입자상물질을 저감시키기 위한 여러 가지 기술들 중 발생된 배출가스가 배기관을 통해 대기중으로 배출되기 전에 엔진 연소실과 배기관 사이에 후처리장치와 같은 기술들을 이용하여 이를 저감시키고 있다. 본 연구에서는 후처리장치들 중 세라믹필터에 백금과 같은 산화성이 우수한 촉매를 코팅하여 만든 촉매식 매연여과장치(DPF ; diesel particulate filter, SK제공)를 사용하였을 때 입자저감성능 및 입자크기별 분포특성을 살펴보고자 하였다. 이를 통해 도시대기오염 저감대책을 기초자료 및 환경학적, 보건학적 연구에 적극 활용하고자 한다. (중략)

• Transactions of the Korean Society of Automotive Engineers
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• v.15 no.2
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• pp.151-158
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• 2007

Filtration studies, using simulated test nanoparticles or diesel nanoparticles, have been performed about Inconel foam filters for DPF combined with electrostatic precipitation. The simulated test particles were synthesized by laser ablation in the nitrogen atmosphere at the standard condition. The diesel particles were exhausted from the diesel engine driven on the condition of idle or load mode. Filtration efficiency of the metal foam filter is very low because most of particles are penetrated through the large pores of filter. However, the efficiency was considerably improved by applying the electric field to the filter and/or charging the nanoparticles. Nevertheless, the pressure drop of filter hardly increased because the filter-pores were not clogged by deposited particles and kept open.

• 한국연소학회:학술대회논문집
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• 2003.05a
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• pp.21-26
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• 2003

Diesel particulate trap is a core technology for the reduction of PM from diesel vehicles This study presents the features and the characteristics of DPF system when using pellet type filters. In comparison with wall-flow filter, the pellet filter has the advantages of cracking free during regeneration and shape flexibility. Experiments are conducted in a test bench simulated as diesel engine exhaust condition. Pressure drop and particle loading rate was compared by using two pellet filters having the porosity of 70% and 0%. Also its regeneration was tested.