The Evaluation on Smoke Reduction by Natural Gas Dual Fuel Engine for City Bus

매연저감을 위한 천연가스 Dual-Fuel 엔진의 시내버스 적용평가

  • 엄명도 (국립환경연구원 자동차공해연구소) ;
  • 조강래 (국립환경연구원 자동차공해연구소) ;
  • 오용석 (국민대학교 기계공학과) ;
  • 한영출 (국민대학교 기계공학과)
  • Published : 1997.06.01

Abstract

CNG dual fuel engine for heavy duty diesel engine developed by AFS International in Canada has been equipped to a Korean city bus engine and tested to compare the engine performance and the emission characteristics with the existing diesel fueled engine. Also the dual-fuel engine was applied to the city bus for road test. The results are summarized as follows. Performance optimization has been carried out to have engine power equivalent to or better than the diesel fueled engine. Smoke is decreased by 85% by Korean smoke 3 mode test. By 13 mode test CO is increased by 453% and THC is increased by 2, 086%. NOx is decreased by 7% in laboratory. D-13 test mode was changed in 1996 Korean regulation. Even though THC is increased very much, it's not too serious problem since CO and HC emission of diesel engine is very little compared to gasoline engine and more than 75% of THC is CH$_4$. But the reduction technologies of CO and HC has to be considered.

Keywords

References

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