Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on the Ultra Lean Combustion Characteristics of the BMW N53 GDI Engine

BMW N53 직접분사식 가솔린 엔진의 초희박 연소특성에 관한 연구

  • Kim, Hong-Suk (Engine Research Team, Korea Institute of Machinery & Materials) ;
  • Oh, Jin-Woo (Engine Research Team, Korea Institute of Machinery & Materials) ;
  • Kim, Sung-Dea (Engine Research Team, Korea Institute of Machinery & Materials) ;
  • Park, Chul-Wong (Engine Research Team, Korea Institute of Machinery & Materials) ;
  • Lee, Seok-Whan (Engine Research Team, Korea Institute of Machinery & Materials) ;
  • Jeong, Young-Il (Engine Research Team, Korea Institute of Machinery & Materials)
  • 김홍석 (한국기계연구원 그린동력연구실) ;
  • 오진우 (한국기계연구원 그린동력연구실) ;
  • 김성대 (한국기계연구원 그린동력연구실) ;
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 이석환 (한국기계연구원 그린동력연구실) ;
  • 정용일 (한국기계연구원 그린동력연구실)
  • Received : 2011.02.07
  • Accepted : 2011.06.14
  • Published : 2011.11.01
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Abstract

Ultra lean combustion with stratified air-fuel mixture is one of the methods that can improve fuel economy of gasoline engines. The aim of this study is to show that how much fuel economy is improved and what are differences in engine control of the ultra lean combustion compared with stoichiometric combustion. In this study, the BMW N53 GDI engine, which is one of ultra lean combustion GDI engines introduced in the market recently, was tested at various engine operating conditions. Results indicated that fuel consumption rates were improved by 11.9~25.8% by the ultra lean combustion compared with stoichiometric combustion. It was also found that multiple fuel injection, multiple spark, early intake valve opening, and large vlave overlap duration were the features of the ultra lean combustion for combustion stability and emission improvement.

Keywords

References

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