Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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The Effects of Split-Injection and EGR on the Combustion Characteristics of a DISI Engine

직접분사식 가솔린 엔진에서 분할분사 및 배기가스 재순환의 효과

  • 문석수 (한국과학기술원 기계공학과) ;
  • 최재준 (한국과학기술원 기계공학과) ;
  • ;
  • 배충식 (한국과학기술원 기계공학과)
  • Published : 2006.01.01
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Abstract

Split injection has been known to reduce total hydrocarbon (THC) emission level and increase engine performance under certain operating conditions 1, 2). Exhaust Gas Recirculation (EGR) is a common technique adopted for nirtric oxides (NOx) reduction by the dilution of intake air, despite a sacrifice of simultaneous increase in THC and decrease in engine performance3). Thus, using split injection with adequate EGR may improve the emission level of UBHC, NOx and the engine performance compared to that of single-injection with or without EGR cases. The purpose of this study is to investigate the engine performance and emission levels at various engine operating conditions and injection methods when it is applied with EGR. The characteristics of single-injection and split-injection were investigated with various engine loads and EGR rates. The engine speed is changed from 800rpm to 1200rpm to investigate how the combustion characteristics are changing with increasing engine speed.

Keywords

References

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