Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Emission Reduction by Mixture Formation in a Diesel-Natural Gas Dual-Fuel Engine at Low Loads

경유-천연가스 이종연료 엔진의 저부하 영역에서 혼합기 형성을 통한 배기배출 저감

  • 박현욱 (한국기계연구원 그린동력연구실) ;
  • 이준순 (과학기술연합대학원대학교 환경에너지기계공학) ;
  • 오승묵 (한국기계연구원 그린동력연구실) ;
  • 김창업 (한국기계연구원 그린동력연구실) ;
  • 이용규 (한국기계연구원 그린동력연구실) ;
  • 배충식 (한국과학기술원 기계공학과)
  • Received : 2019.10.17
  • Accepted : 2019.12.08
  • Published : 2019.12.30
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Abstract

A mixture preparation strategy was proposed and evaluated in a diesel-natural gas dual-fuel engine to reduce hydrocarbon (HC) and carbon monoxide (CO) emissions under low load conditions. An experimental investigation was conducted in a single-cylinder compression-ignition engine. Natural gas was supplied with air during the intake stroke, and diesel was injected directly into the combustion chamber during the compression stroke. First, effects of diesel start of energizing (SOE) and natural gas substitution ratio on the combustion and exhaust gas emissions were analyzed. Based on the results, the mixture preparation strategy was established. A low natural gas substitution ratio and a high exhaust gas recirculation (EGR) rate were effective in reducing the HC and CO emissions.

Keywords

References

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