Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effect of EGR Rate on Combustion and Emission Characteristics in a Single-cylinder Direct Injection Diesel Engine with Common-rail

직접분사식 커먼레일 단기통 디젤엔진에서 EGR율에 따른 연소 및 배기특성

  • Heo, Jeong-Yun (Graduate School of Mechanical Engineering, Hanyang University) ;
  • Cha, June-Pyo (Graduate School of Mechanical Engineering, Hanyang University) ;
  • Yoon, Seung-Hyun (Graduate School of Mechanical Engineering, Hanyang University) ;
  • Lee, Chang-Sik (Department of Mechanical Engineering, Hanyang University)
  • 허정윤 (한양대학교 대학원 기계공학과) ;
  • 차준표 (한양대학교 대학원 기계공학과) ;
  • 윤승현 (한양대학교 대학원 기계공학과) ;
  • 이창식 (한양대학교 기계공학부)
  • Received : 2010.01.21
  • Accepted : 2010.09.29
  • Published : 2011.03.01
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Abstract

The purpose of this work is an experimental investigation of combustion and emission characteristics in DI diesel engine applied high EGR rate as a method of low-temperature combustion. In order to analyze the effect of EGR rate variation, a single-cylinder DI diesel engine was operated under various EGR rate conditions. In addition, injection timing was variously controlled to investigate the effect of injection timing in DI diesel engine using the cooled-EGR system. The NOx emissions were decreased in accordance with the increase of EGR rate. On the contrary, soot emissions were generally increased under applied EGR conditions. However, soot emissions were decreased in a few injection timings under high EGR rate conditions. The EGR results show that the ignition delay were increased by decreased oxygen concentrations in combustion chamber under the high EGR rate.

Keywords

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