Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Investigation for 2-stage Injection Strategy on Combustion and Emissions in a D.I Compression-ignition Engine Fueled with DME

직접분사식 압축착화엔진에서 DME의 2단 분사전략에 따른 엔진연소 및 배기특성에 관한 연구

  • Jeong, Jae-Hoon (Graduate of Mechanical and Automotive Engineering, Ulsan University) ;
  • Jung, Dong-Won (Graduate of Mechanical and Automotive Engineering, Ulsan University) ;
  • Lim, Ock-Taek (Department of Mechanical and Automotive Engineering, Ulsan University) ;
  • Pyo, Young-Duck (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Lee, Young-Jae (Energy Efficiency Department, Korea Institute of Energy Research)
  • 정재훈 (울산대학교 대학원 기계자동차공학과) ;
  • 정동원 (울산대학교 대학원 기계자동차공학과) ;
  • 임옥택 (울산대학교 기계자동차공학부) ;
  • 표영덕 (한국에너지기술연구원 에너지효율연구단) ;
  • 이영재 (한국에너지기술연구원 에너지효율연구단)
  • Received : 2011.03.04
  • Accepted : 2011.09.24
  • Published : 2012.05.01
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Abstract

This work was investigated 2-stage injection strategy on combustion and emissions in a direct injection compression-ignition engine fueled with DME. Single cylinder engine was equipped with common rail. Injection pressure was 700bar, dSOI between the main injection and the pilot injection was varied. Diesel was used as compared fuel of DME in all cases. The results was shown that maximum pressure was higher than all cases and its amount of DME and diesel was similar. Regardless the pilot injection, the main fuel injection timing was same. The heat release rate of the main injection for diesel was high while that of pilot injection for DME was high. The THC was very low regardless of the fuel type and injection strategy. In the single injection, NOx was increased to retard of main injection timing regardless of the fuel type. NOx emissions was decreased with the retardation of the main injection timing regardless of the fuel type in the case of 2-stage injection strategy.

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References

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