Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Modeling of Liquid Fuel Behavior to Control Air/Fuel Ratio in the Intake Port of SI Engines

가솔린 기관 공연비 제어를 위한 흡기포트 내의 연료액막 모델링

  • 조훈 (서울대학교 대학원 기계공학과) ;
  • 민경덕 (서울대학교 기계항공공학부) ;
  • 황승환 (아주대학교 대학원 기계공학과) ;
  • 이종화 (아주대학교 기계 및 산업공학부)
  • Published : 2000.04.01
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Abstract

A wall fuel-film flow model is developed to predict the effect of a wall-fuel-film on air-fuel ratio in an SI engine in transient conditions. Fuel redistribution in the intake port resulting from charge backflow and a simple liquid fuel behavior in the cylinder are included in this model. Liquid fuel film flow is calculated of every crank angle degree using the instantaneous air flow rate. The model is validated by comparing the calculated results and corresponding engine experiment results of a commercial 4 cylinder DOHC engine. The predicted results match well with the experimental results. To maintain the constant air-fuel ratio during transient operation. the fuel injection rate control can be obtained from the simulation result.

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References

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