한국가스학회지 (Journal of the Korean Institute of Gas)

  • 제19권6호
  • /
  • Pages.40-46
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  • 2015
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  • 1226-8402(pISSN)
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  • 2713-6922(eISSN)
한국가스학회 (The Korean Institute of GAS)
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운전조건 변화가 HCNG 엔진용 삼원촉매 전환효율에 미치는 영향

Effect of Operating Condition Change on the Conversion Efficiency of TWC with HCNG Engine

  • 김창기 (한국기계연구원 그린동력연구실) ;
  • 이성원 (한국기계연구원 그린동력연구실) ;
  • 이의형 (한국기계연구원 그린동력연구실) ;
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 이선엽 (한국기계연구원 그린동력연구실) ;
  • 최영 (한국기계연구원 그린동력연구실) ;
  • 이장희 (한국기계연구원 그린동력연구실)
  • Kim, Chang-Gi (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Sung-Won (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Yi, Ui-Hyung (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Park, Cheol-Woong (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Sun-Youp (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Choi, Young (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Jang-Hee (Dept. of Engine Research, Korea Institute of Machinery and Materials)
  • 투고 : 2015.11.02
  • 심사 : 2015.12.24
  • 발행 : 2015.12.31
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초록

이론공연비방식 엔진은 삼원촉매를 이용하여 유해배기가스를 매우 효과적으로 저감시킬 수 있는 장점을 가지고 있다. 삼원촉매는 높은 정화효율을 보이는 공연비범위가 좁기 때문에 엔진에서의 공연비 제어가 매우 중요하다. 본 연구에서는 삼원촉매 성능을 평가하기 위하여 다양한 운전영역에서 삼원촉매의 전환효율을 비교 분석하였다. 최적의 전환효율을 보이는 당량비를 확인하기 위하여 당량비 제어값 변화에 의한 전환효율을 살펴보았다. 실험결과 당량비 제어를 통하여 각 운전조건에서 NMHC, CH4, CO 및 NOx의 전환효율이 95%이상 나타내는 최적 운전조건을 찾을 수 있었다. 동등한 배기가스 온도 조건에서는 출력이 증가할수록 최적당량비가 선형적으로 증가하는 경향을 보였다.

Stoichiometric combustion engine with Three-way catalyst had an advantage that can reduce the harmful emissions effectively. Fuel equivalence ratio controlled from engine is very important because Fuel equivalence ratio with high conversion efficiency was narrow. This study analyzed the conversion efficiency under whole range of operating area for to evaluate the performance of three-way catalyst. In order to identify the Optimum conversion efficiency, the conversion efficiency due to change the control value of fuel equivalence ratio was investigated. The result show that conversion efficiency of emissions(more than 95%) has discovered by means of fuel equivalence ratio control at each test condition. As engine power increases, optimal fuel equivalence ratio tended to increase linearly under operating conditions of similar exhaust gas temperature.

키워드

참고문헌

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피인용 문헌

  1. 수소-천연가스 혼합연료 엔진의 삼원촉매 전환효율 특성 연구 vol.20, pp.6, 2015, https://doi.org/10.7842/kigas.2016.20.6.23