Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Comparison of Combustion Characteristics with Combustion Strategy and Excess Air Ratio Change in a Lean-burn LPG Direct Injection Engine

직접분사식 LPG 엔진의 연소전략 및 공기과잉률 변화에 따른 연소특성 비교

  • 조시현 (가천대학교 대학원 기계공학과) ;
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 오승묵 (한국기계연구원 그린동력연구실) ;
  • 윤준규 (가천대학교 대학원 기계공학과)
  • Received : 2014.03.07
  • Accepted : 2014.05.07
  • Published : 2014.09.01
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Abstract

Liquefied Petroleum Gas(LPG) has attracted attention as a alternative fuel. The lean-burn LPG direct injection engine is a promising technology because it has an advantage of lower harmful emissions. This study aims to investigate the effect of combustion strategy and excess air ratio on combustion and emission characteristics in lean-burn LPG direct injection engine. Fuel consumption and combustion stability were measured with change of the ignition timing and injection timing at various air/fuel ratio conditions. The lean combustion characteristics were evaluated as a function of the excess air ratio with the single injection and multiple injection strategy. Furthermore, the feasibility of lean operation with stratified mixture was assessed when comparing the combustion and emission characteristics with premixed lean combustion.

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References

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