Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Part Load Performance Characteristics according to Port Masking

포트 마스킹에 따른 엔진 부분부하 성능 특성

  • Kim, Hyeong-Sig (Graduate School of Energy & Environment, Seoul National University of Science and Technology) ;
  • Kim, In-Ok (Graduate School of Energy & Environment, Seoul National University of Science and Technology) ;
  • Park, Chan-Jun (Department of Mechanical Engineering, Seoul National University of Science and Technology) ;
  • Ohm, In-Yong (Department of Mechanical Engineering, Seoul National University of Science and Technology)
  • 김형식 (서울과학기술대학교 에너지환경대학원) ;
  • 김인옥 (서울과학기술대학교 에너지환경대학원) ;
  • 박찬준 (서울과학기술대학교 기계공학과) ;
  • 엄인용 (서울과학기술대학교 기계공학과)
  • Received : 2010.03.09
  • Accepted : 2010.10.17
  • Published : 2011.03.01
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Abstract

To expand lean misfire limit and improve combustion stability, the effects of port masking were estimated to secure basic data for applying the mechanism to SI engine instead of asymmetrical port and port throttling devises. For this purpose, various shapes and ratios of masking plates were mounted between port and manifold. The masking effects were evaluated by mixture response test under various load and speed conditions. The results showed that lean misfire limits were expended and fast combustion was observed for all masking shapes and ratios, especially, the effect of diagonal 1/4 masking was remarkable. In conclusion, the port masking method could be easily applied to engine without redesign of port for improving part load performance.

Keywords

References

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