Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
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Study on Combustion Characteristics of Single-Cylinder Diesel Engine by Double Injection

이중 분사 적용에 따른 단기통 디젤엔진의 연소특성에 관한 연구

  • Lee, Jong-Tae (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Shin, Dalho (Department of Mechanical Engineering, Graduate School of Chonnam National University) ;
  • Kim, Hyung Jun (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Yun, Chang-Wan (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Kim, Jeong-Soo (Transportation Pollution Research Center, National Institute of Environmental Research) ;
  • Park, Suhan (School of Mechanical Engineering, Chonnam National University)
  • 이종태 (국립환경과학원 교통환경연구소) ;
  • 신달호 (전남대학교 대학원 기계공학과) ;
  • 김형준 (국립환경과학원 교통환경연구소) ;
  • 윤창완 (국립환경과학원 교통환경연구소) ;
  • 김정수 (국립환경과학원 교통환경연구소) ;
  • 박수한 (전남대학교 기계공학부)
  • Received : 2016.10.30
  • Accepted : 2017.01.31
  • Published : 2017.03.30
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Abstract

This paper presents an experimental study on the effect of double injection strategies on combustion characteristics in a single-cylinder diesel engine. These studies are applied to the double injection strategies, such as $2^{nd}$ injection timing variations with fixed injection interval (8 degree) and variations of injection pressures with fixed injection timing and intervals. The injection quantity was 7 + 7 mg for double injections, and 14 mg for single injection. When the injection pressure was increased, the ignition delay was shortened, and the ISFC (indicated specific fuel consumption) was increased due to the fast termination of combustion by the shortened energizing duration. In addition, the retardation of injection timings toward TDC (top dead center) caused the reduction of ignition delay and the decrease of ISFC with the decrease of FMEP (friction mean effective pressure).

Keywords

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