Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Numerical Study on Combustion and Emission Characteristics in Heavy Duty Diesel Engine with Post Injection

후분사를 적용한 대형디젤엔진의 연소 및 배기 특성에 관한 수치해석적 연구

  • Choi, Minsu (Department of Mechanical Engineering, Graduate School, Pusan National University) ;
  • Bae, Jaeok (Department of Mechanical Engineering, Graduate School, Pusan National University) ;
  • Suh, Hyunuk (Department of Mechanical Engineering, Graduate School, Pusan National University) ;
  • Lee, Byunghwa (Pusan Clean Coal Center, Pusan National University) ;
  • Jeon, Chunghwan (School of Mechanical Engineering, Pusan National University)
  • 최민수 (부산대학교 대학원 기계공학부) ;
  • 배재옥 (부산대학교 대학원 기계공학부) ;
  • 서현욱 (부산대학교 대학원 기계공학부) ;
  • 이병화 (부산대학교 화력발전에너지분석기술센터) ;
  • 전충환 (부산대학교 기계공학부)
  • Received : 2013.10.14
  • Accepted : 2013.12.05
  • Published : 2014.01.01
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Abstract

A numerical study has been carried out to analyze the combustion characteristics in heavy duty diesel engine with post injection for reducing NO emission. For verification of numerical study results, calculated cylinder pressure was matched to experimental data. In this study, post injection timing and amount of post injection were modified as parameters, but the total amount of injection fuel was maintained. As the results, maximum cylinder pressure increases above minimum 2% by post injection and end of pressure curve is decreased rapidly. The more dwell time and amount of post injection fuel are, the more pressure drop occurs. And trade-off relation of NO and soot are appeared. In the results, NO was reduced without deterioration of cylinder pressure under condition of $10^{\circ}$ CA dwell time and main 60%, post 40% fuel portion.

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References

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