Combustion and Emission Characteristics in CNG Engine with SCV

SCV를 장착한 CNG 엔진의 연소 및 배출가스 특성

  • 김진영 (동아대학교 기계공학과 대학원) ;
  • 박원옥 (동아대학교 기계공학과 대학원) ;
  • 공태원 (동아대학교 기계공학과 대학원) ;
  • 하종률 (동아대학교 기계산업시스템공학부)
  • Published : 2003.05.01

Abstract

Natural gas is one of the promising alternative fuels because of the abundant deposits and the cleanness of emission gas. CNG has a lot of merits except lower burning speed has a slow disadvantage. One way to overcome the disadvantage is to raise a turbulence intensity. We give various intake for changing turbulence intensity in the cylinder by three kinds of swirl control valve with a way to raise a turbulence intensity. In the present study, a $1.8\ell$ conventional gasoline engine is modified to use a CNG as a fuel instead of gasoline. We try to virify combustion and emission characteristics in each engine parameters. Parameters of experimentation are equivalence ratio, spark timing and intake flow change. The results of this study are as swirl flows. In the case of adding swirl flow, burning speed and torque are increased. But NOx and THC concentration are increased a little respectively.

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References

  1. KEI Study of Diffusion Activation Plan for Low Emission Fuel Vehicle H. J. Han
  2. NGV 94 International Gas Union
  3. SAE 912558 Natyral Gas of Vehicles(NGV) G. J. Waldron;R. G. Allen
  4. Prog. Energy Combust. Sci. v.2 Turbulence and Turbulent combustion in Spark-Ignition Engines R. J. Tabaczynski https://doi.org/10.1016/0360-1285(76)90010-1
  5. SAE 920574 A Stury about In-Cylinder Flow and Combustion in a Four-Valve SI Engine H. Kudow;H. Yamamoto;L. Lita
  6. Journal of KASE v.13 no.2 Performance Characteristics of CNG Vehicle at Various Compression Ratios B. S. Kim;Y. J. Lee;C. J. Koh
  7. KIER-991404 Development of Conversion Technology of Small van to High Efficiency CNG Sole Vechicle