한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제16권1호
  • /
  • Pages.78-85
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  • 2008
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

LPG-DME 압축착화 엔진의 성층화 영향

Fuel Stratification Effects of LPG-DME Compression Ignition Engine

  • 염기태 (한국과학기술원 기계공학과) ;
  • 배충식 (한국과학기술원 기계공학과)
  • Yeom, Ki-Tae (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)
  • 발행 : 2008.02.01
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초록

The exhaust emission characteristics of a liquefied petroleum gas-di-methyl ether (LPG-DME) compression ignition engine was investigated under homogeneous charge, stratified charge and diffusion combustion conditions. LPG was used as the main fuel and injected into the combustion chamber directly. DME was used as an ignition promoter and injected into the intake port. Different LPG injection timings were tested to verify the combustion characteristics of the LPG-DME compression ignition engine. The combustion was divided into three region which are homogeneous charge, stratified charge, and diffusion combustion region according to the injection timing of LPG. The HC emission was reduced with LPG stratification. However, the carbon monoxide and particulate matter emissions were increased. The ignition timing was advanced with LPG stratification. This advance combustion was because of charge temperature and cetane number stratification with LPG.

키워드

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