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

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Study on the Combustion and Emission Characteristics of the Early Injection in a Gasoline Direct Injection Engine Using Controlled Auto Ignition Combustion Method

CAI 연소 방법을 이용한 직분식 가솔린 엔진내의 조기 분사시 연소 및 배기 특성에 관한 실험적 연구

  • 최영종 (한양대학교 대학원 기계공학과) ;
  • 이기형 (한양대학교 기계공학과) ;
  • 이창희 (한양대학교 기계공학과)
  • Published : 2006.05.01
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Abstract

Controlled auto ignition (CAI) combustion, also known as HCCI (homogeneous charge compression ignition), offers the potential to simultaneously improve fuel economy and reduce emission. CAI-combustion was achieved in a single cylinder gasoline DI engine, with a cylinder running in a CAI mode. Standard components were used the camshafts which had been modified in order to restrict the gas exchange process. The effects of air-fuel ratio, residual EGR rate and injection timing such as early injection and late injection on the attainable CAI combustion region were investigated. The effect that injection timings on factor such as start of combustion, combustion duration and heat release rate was also investigated. From results early injection caused the mixture to ignite earlier and burn more quickly due to the exothermic reaction during the recompression and gave rise to good mixing of the fuel-air.

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References

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