한국분무공학회지 (Journal of ILASS-Korea)

  • 제24권4호
  • /
  • Pages.163-170
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  • 2019
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
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CNG 대형엔진에서 이중 O2 센서를 활용한 피드백 제어를 통한 삼원촉매 정화효율 향상

Feedback Control using Dual O2 Sensors for Improving the Conversion Efficiency of a Three-way Catalyst in a Heavy-duty CNG Engine

  • 윤성준 (한국기계연구원) ;
  • 이준순 (과학기술연합대학원대학교 환경에너지기계공학과) ;
  • 박현욱 (한국기계연구원) ;
  • 이용규 (한국기계연구원) ;
  • 김창업 (한국기계연구원) ;
  • 오승묵 (한국기계연구원 & 과학기술연합 대학원대학교 환경에너지기계공학과)
  • 투고 : 2019.09.11
  • 심사 : 2019.10.29
  • 발행 : 2019.12.30
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초록

In this study, feedback logic using dual O2 sensor values were developed to increase the purification capability of a three-way catalyst (TWC) in a compressed natural gas (CNG) engine. A heavy-duty inline 6-cylinder engine was used and the CNG was supplied to the engine through a mixer. This study consists of two main parts, namely, the proportional integral (PI) control with a front O2 sensor and the feedback control with dual O2 sensors. In the PI control experiment, effects of various parameters, such as P gain, I gain, and lean delay, on the TWC capability were identified. Based on the results of the PI control experiment, the feedback logic using dual O2 sensor values were developed. In both cases, the nitrogen oxides (NOX) emissions were nearly zero. However, the carbon monoxide (CO) emissions were reduced significant in the feedback logic with dual O2 sensors than in the PI control with the front O2 sensor.

키워드

참고문헌

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