Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effect of Early Injection Strategy on the Combustion and Emission Characteristics of the Common-rail DI Diesel Engine

코먼레일 직접분사식 디젤 엔진의 조기 분사가 연소 및 배기특성에 미치는 영향

  • Yoon, Seung-Hyun (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Myung-Yoon (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Dae-Sik (Graduate School of Hanyang University) ;
  • Lee, Je-Hyung (Mechanical Engineering and Technology Research Institute, Hanyang University) ;
  • Lee, Chang-Sik (Research & Development for Hyundai Motor Company & Kia Motors Corporation)
  • Published : 2006.07.01
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Abstract

An experimental investigation of an early injection strategy was conducted on a small single cylinder common-rail DI diesel engine to reduce the oxides of nitrogen($NO_x$) emission. The main objectives of this study were to investigate the emissions, performance and combustion characteristics in a diesel engine with early and two-stage injections. The two- stage injection was conducted to reduce the wall-wetting of early injected fuels on the cylinder wall or to promote the ignition of premixed charge. The engine test was performed at conditions of 1500rpm, injection timing ranging from TDC to BTDC $80^{\circ}$. The experimental results show that $NO_x$ emissions were decreased in both cases of early injection and two stage injection compared to the conventional diesel combustion by the near TDC injection. However, soot and products of incomplete products (i.e. HC and CO) are slightly increased. Also, the second injection near TDC promoted the ignition of premixed fuel, therefore, IMEP was increased.

Keywords

References

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