Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on Estimation of PM Mass in DPF from Pressure Drop in 3L Diesel Engine

3L급 디젤엔진의 배압이용 DPF 매연포집량 예측에 대한 연구

  • Kim, Hong-Suk (Dept of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Jin-Wook (Dept of Mechanical Engineering, Soongsil Univ.)
  • 김홍석 (한국기계연구원 그린동력연구실) ;
  • 이진욱 (숭실대학교 기계공학과)
  • Received : 2009.12.21
  • Accepted : 2010.02.23
  • Published : 2010.05.01
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Abstract

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.

디젤 매연여과장치내 포집된 입자상물질의 재생 시기를 제어하기 위해서는 매연 포집량을 정확히 예측하는 것이 중요하다. 필터내 축적된 매연 포집량은 필터 전 후의 압력차와 배기유량에 의해 예측될 수 있다. 따라서 본 연구에서는 먼저, 디젤산화촉매와 디젤매연여과장치 전 후의 각각 압력차의 비로써 정의한 매연지수의 산출을 위해 효과적인 신호처리방법을 제시하였다. 이를 3L급 승용 디젤엔진에서 정상운전조건과 과도운전조건에서 비교한 결과, 매연지수와 매연 포집량에 있어서 일정 상관관계가 있음을 알 수 있었다.

Keywords

References

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