Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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A Basic Study on Combustion Characteristics of Radical Ignition Sub-chamber Type CNG DI Engine

라디칼 점화 부실 혼합형 CNG DI 엔진의 연소특성에 관한 기초연구

  • 정성식 (동아대학교 기계공학과) ;
  • 황성일 (기아자동차(주)부산서비스센터) ;
  • 임춘미 (동아대학교 기계공학과 대학원)
  • Received : 2017.10.30
  • Accepted : 2017.12.26
  • Published : 2018.02.28
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Abstract

After the recent fabrication of diesel vehicle exhaust gas by Volkswagen, nitrogen oxides ($NO_x$) and particulate matter (PM) are drawing attention as representative pollutants included in exhaust gas. When gasoline and diesel fuels are combusted through direct injection into a combustion chamber at high pressure, PM emission is actually increased. To find a solution to this problem, a basic study was conducted to derive an optimized variable for combustion of compressed natural gas (CNG) by applying CNG, acknowledged as a clean fuel, to direct injection system. The essence of this study is in the introduction of a radical ignition technology for compressed natural gas (RI-CNG) in a sub-chamber type engine. The direct injection system was applied to a sub-chamber to remove residual gas from previous combustion cycle. In addition, optimal mixer distribution was achieved by precisely setting ignition timing based on fuel injection timing and excess air ratio.

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References

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