Estimation of soot oxidation rate in DPF under carbon and non-carbon based particulate matter accumulated condition

  • B. J. Shim
  • K. S. Park
  • J. M. Koo
  • M. S. Nguyen
  • S. H. Jin
Article

Abstract

By high particulate matter(PM) reduction performance, diesel particulate filter(DPF) is applied to almost all of modern HSDI diesel engine. PM emitted from diesel engine is consist of carbon based and non-carbon based material. Representative carbon based PM is soot. Non-carbon based PM is produced by wear of engine and exhaust component, combustion of lubrication oil and sulphur in fuel. Accumulation of non-carbon based PM affects pressure difference of DPF and thus accuracy of soot mass estimation in DPF can be lowered during normal and regeneration condition when the pressure difference caused by non-carbon based PM is not recognized correctly. Also unevenly accumulated PM inside of DPF can produce locally different exhaust gas temperature and thus it can lower accuracy of soot mass estimation during regeneration. This study focuses on estimation of soot oxidation rate not by conventional pressure difference but by exhaust gas analysis at up and downstream of DPF. Results, strong correlations between CO2 -fuel mass ratio and soot oxidation was observed.

Key Words

Diesel particulate filter (DPF) Particulate matter (PM) Soot oxidation Carbon-based PM 

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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • B. J. Shim
    • 1
  • K. S. Park
    • 2
  • J. M. Koo
    • 2
  • M. S. Nguyen
    • 1
  • S. H. Jin
    • 3
  1. 1.Graduate School of Mechanical EngineeringKyunghee UniversityGyeonggiKorea
  2. 2.Department of Mechanical EngineeringKyunghee UniversityGyeonggiKorea
  3. 3.Lincoln School of EngineeringUniversity of LincolnBrayford Pool, LincolnUK

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