Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Knocking and Combustion Characteristics at Rich Limit of Gasoline HCCI Engine

가솔린 예혼합 압축 착화 엔진의 농후 한계에서 연소와 노킹 특성

  • Yeom, Ki-Tae (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jang, Jin-Young (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Bae, Choong-Sik (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
  • 염기태 (한국과학기술원 기계공학과) ;
  • 장진영 (한국과학기술원 기계공학과) ;
  • 배충식 (한국과학기술원 기계공학과)
  • Published : 2006.11.01
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Abstract

Variable valve timing is one of the attractive ways to control homogeneous charge compression ignition (HCCI) engine. Hot internal residual gas which can be controlled by variable valve timing(VVT) device, makes fuel evaporated easily, and ignition timing advanced. Regular gasoline was used as main fuel and di-methyl ether(DME) was used as ignition promoter in this research. HCCI engine operating range is limited by high combustion peak pressure and engine noise. High combustion pressure can damage the engine during operation. To avoid engine damage, the rich limits have to define using various methods. Peak combustion pressure, rate of cylinder pressure rise was considered to determine rich limit of engine operating range. Knock probability was correlated with the rate of cylinder pressure rise as well as the peak combustion pressure.

Keywords

References

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