Simulation on the characteristic of gas flow and mixing for the location of the oxygen sensor in the exhaust system

Simsoo Park, Ho Young Kim, Jin Taek Chung, Y. Cho, H. G. Chang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

One of the methods for reducing engine exhaust emission is to use a close-coupled catalytic converter (CCC). To obtain the maximum conversion efficiency in a CCC, the exhaust gas should be uniformly distributed across the frontal area of the catalytic substrate as much as possible, and the engine should be operated at a condition close to the stoichiometric air/fuel ratio by using an oxygen sensor in the exhaust system. A theoretical and computational study on three-dimensional unsteady compressible non-reacting flow for three kinds of exhaust manifold and a CCC system was performed to understand the flow characteristics and estimate the effects of geometric change. In each case, the oxygen sensor location where the local exhaust gas can represent the average flow of exhaust is proposed.

Original languageEnglish
Pages (from-to)161-169
Number of pages9
JournalProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Volume216
Issue number2
DOIs
Publication statusPublished - 2002 Dec 1

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Oxygen sensors
Catalytic converters
Exhaust systems (engine)
Flow of gases
Exhaust gases
Exhaust manifolds
Conversion efficiency
Engines
Substrates
Air

Keywords

  • Close-coupled catalytic converter (CCC)
  • Computational fluid dynamics (CFD)
  • Oxygen sensor
  • Unsteady flow

ASJC Scopus subject areas

  • Mechanical Engineering
  • Automotive Engineering

Cite this

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