Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Experimental Study on Regeneration Characteristics by Variation of Exhaust Gas Temperature, HC and $O_2$ Concentrations on DOC-CDPF System

배기가스의 온도 및 HC와 $O_2$의 조성 변화에 따른 DOC-CDPF의 재생 특성에 관한 실험적 연구

  • Cho, Yong-Seok (Department of Mechanical and Automotive Engineering, Kookmin University) ;
  • Lee, Seang-Wock (Department of Mechanical and Automotive Engineering, Kookmin University) ;
  • Lee, Jung-Sub (Graduated School of Automotive Engineering, Kookmin University) ;
  • Yoon, Yu-Bin (Graduated School of Automotive Engineering, Kookmin University) ;
  • Park, Young-Joon (Graduated School of Automotive Engineering, Kookmin University)
  • 조용석 (국민대학교 기계자동차공학부) ;
  • 이성욱 (국민대학교 기계자동차공학부) ;
  • 이정섭 (국민대학교 자동차공학전문대학원) ;
  • 윤여빈 (국민대학교 자동차공학전문대학원) ;
  • 박영준 (국민대학교 자동차공학전문대학원)
  • Published : 2009.01.01
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Abstract

A catalyzed diesel particulate filter (CDPF) causes the progressive increase in back pressure of an exhaust system due to the loading of soot particles. To minimize pressure drop which is generated by CDPF, the filter should be regenerated when it collects a certain quantity of soot. It is important to know characteristics of regeneration of CDPF with various of exhaust gas temperatures and compositions. The oxidation of HC in DOC leads to increase gas temperature of DOC downstream. The increased gas temperature by DOC has an positive effect on CDPF regeneration. This study presents characteristics of regeneration of CDPF with DOC according to various gas composition, such as HC and $O_2$ concentration. The test-rig is used to control each gas composition and temperature during regeneration of CDPF. Experimental results indicate that the increased concentration of $O_2$ regenerates DPF more actively. With increasing HC concentration, the gas temperature of CDPF upstream increased due to more oxidation of HC. But excessive supply of HC leads to decrease of $O_2$ concentration in the CDPF, which makes it hard to regenerate CDPF.

Keywords

References

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