Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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The Effect of Mixing Rate and Multi Stage Injection on the Internal Flow Field and Combustion Characteristics of DISI Engine Using Methanol-gasoline Blended Fuel at High Speed / High Load Condition

고속 고부하 상태의 DISI 엔진에서 메탄올-가솔린 혼합연료의 연료 혼합비와 2단 분사가 엔진 내부유동 및 연소특성에 미치는 영향

  • Bae, Jinwoo (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Seo, Juhyeong (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Lee, Jae Seong (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Kim, Ho Young (Department of Mechanical Engineering, Korea University)
  • 배진우 (고려대학교 대학원 기계공학과) ;
  • 서주형 (고려대학교 대학원 기계공학과) ;
  • 이재성 (고려대학교 대학원 기계공학과) ;
  • 김호영 (고려대학교 기계공학부)
  • Received : 2011.12.13
  • Accepted : 2013.04.29
  • Published : 2013.09.01
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Abstract

Numerical studies were conducted to investigate the internal flow field and combustion characteristics of DISI engine with methanol blended in gasoline. Dual injection was applied and the characteristics were compared to single injection strategy. The amount of the fuel injection was corresponded to air-fuel ratio of each fuel for complete combustion. The preforming model in this study, software STAR-CD was employed for both modeling and solving. The operating speed condition were at 4000 rpm/WOT (Wide open throttle) where the engine was fully warmed. The results of single injection with M28 showed that the uniformity, equivalence ratio, in-cylinder pressure and temperature increased comparing to gasoline (M0). When dual injection was applied, there was no significant change in uniformity and equivalence ratio but the in-cylinder pressure and temperature increased. When M28 fuel and single injection was applied, the CO (Carbon monoxide) and NO (Nitrogen oxides) emission inside the combustion chamber increased approximately 36%, 9% comparing with benchmarking case in cylinder prior to TWC (Three Way Catalytic converter). When dual stage injection was applied, both CO and NO emission amount increased.

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References

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