Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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A Study on Combustion Characteristics of Spark-Ignited Engine with Different Late Intake Valve Closing for Miller Cycle

밀러사이클 적용 스파크점화기관의 후기 흡기밸브 닫힘각 변화에 따른 연소성능 연구

  • 정진호 (숭실대학교 대학원 기계공학과) ;
  • 강선제 (숭실대학교 대학원 기계공학과) ;
  • 김진수 (숭실대학교 대학원 기계공학과) ;
  • 정석철 (숭실대학교 대학원 기계공학과) ;
  • 이진욱 (숭실대학교 대학원 기계공학과)
  • Received : 2015.07.08
  • Accepted : 2015.09.17
  • Published : 2015.09.30
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Abstract

In order to research engine characteristics of spark-ignited engine with intake valve closing timing change for Miller cycle, two cam for LIVC(Late Intake Valve Closing) were designed and fabricated an prototype valvetrain. And intake valve closing timing were adjusted to build low compressing and high expansion cycle for HEV. In experimental study, it were investigated with different engine speed, spark timing and air-fuel ratio to compare base cam and LIVC cam type. It was found that the volumetry efficiency and effective work of compression process were decreased in case of LIVC cam. When compared with the existing results, the maximum pressure in the cylinder was reduced about 12~13 bar and the volumetric efficiency was reduced about 16%.

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References

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