Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Influence of Piston Bowl Geometry on Combustion of a Diesel/CNG Reactivity Controlled Compression Ignition Engine

디젤/천연가스 반응성제어 압축착화 엔진에서 피스톤 형상에 따른 연소 특성

  • 김현수 (한국과학기술원 기계공학과) ;
  • 김우영 (한국과학기술원 기계공학과) ;
  • 배충식 (한국과학기술원 기계공학과)
  • Received : 2021.03.03
  • Accepted : 2021.04.21
  • Published : 2021.06.30
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Abstract

The reactivity controlled compression ignition (RCCI) is the technology that provides two different types of fuel to the combustion chamber with the advantage of significantly reducing particulate matter and nitrogen oxides emissions. However, due to the characteristics of lean combustion, combustion efficiency is worsened. The conventional type of pistons for conventional diesel combustion (CDC) has mostly been used in the researches on RCCI. Because the pistons for CDC are optimized to enhance flow and target spray, the pistons are unsuitable for RCCI. In this study, a piston that is suitable for RCCI is designed to improve combustion efficiency. The new piston was designed by considering the factors such as squish geometry, bowl depth, and surface area. The experiment was carried out by fixing the energy supply to 0.9kJ/cycle and 1.5kJ/cycle respectively. The two pistons were quantitatively compared in terms of thermal efficiency and combustion efficiency.

Keywords

Acknowledgement

본 연구는 환경부 Global-Top Project(글로벌탑 저배기/저탄소 자동차 신연소 원천기술 개발, 2016002070001) 친환경자동차기술개발사업단의 지원에 의해 수행되었으며 이에 감사드립니다.

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