An Experimental Study on Reductions of Idle Emissions with the Syngas Assist in an SI Engine

합성가스를 이용한 SI 엔진의 공회전 유해 배기가스 저감에 관한 실험적 연구

  • 김창기 (한국기계연구원) ;
  • 강건용 (한국기계연구원) ;
  • 송춘섭 (국민대학교 자동차공학 전문대학원) ;
  • 조용석 (국민대학교 자동차공학 전문대학원)
  • Published : 2007.05.01


Fuel reforming technology for the fuel cell vehicles could be applied to internal combustion engine for the reduction of engine out emissions. Since syngas which is reformed from fossil fuel has hydrogen as a major component, it has abilities to enhance the combustion characteristics with wide flammability and high speed flame propagation. In this study, syngas was added to a gasoline engine to improve combustion stability and exhaust emissions of idle state. Syngas fraction is varied to 0%, 50%, 100% with various ignition timing and excess air ratio. Combustion stability, exhaust emissions, fuel consumption and exhaust gas temperature were measured to investigate the effects of syngas addition on idle performance. Results showed that syngas has ability to widely extend lean operation limit and ignition retard range with dramatical reduction of engine out emissions.


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