Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Experimental Study on Application of UBD20 according to EGR Rate in a CRDI Type Diesel Engine

CRDI 방식 디젤기관의 EGR율에 따른 UBD20 적용에 관한 실험 연구

  • Shin, Seo-Yong (Graduate School of Mechanical Engineering, Chungnam National University) ;
  • Im, Seok-Yeon (Graduate School of Mechanical Engineering, BK21 Mechatronics Group, Chungnam National University) ;
  • Jung, Young-Chul (Division of Mechanical & Automative Engineering, Kongju National University) ;
  • Choi, Doo-Seuk (Division of Mechanical & Automative Engineering, Kongju National University) ;
  • Ryu, Jeong-In (Department of Mechanical Engineering, BK21 Mechatronics Group, Chungnam National University)
  • 신서용 (충남대학교 대학원 기계공학과) ;
  • 임석연 (충남대학교 대학원 기계공학과, BK21 메카트로닉스사업단) ;
  • 정영철 (공주대학교 기계자동차공학부) ;
  • 최두석 (공주대학교 기계자동차공학부) ;
  • 류정인 (충남대학교 기계공학부, BK21 메카트로닉스사업단)
  • Published : 2007.11.01
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Abstract

An object of this study is to understand the application characteristics in accordance with changes of EGR rate, applying BD20 reformed by ultrasonic energy irradiation to common-rail diesel engine. BD containing about 10% oxygen has attracted attention due to soaring crude oil prices and environmental pollution. This oxygen decreases soot by promoting combustion, but it also increases NOx. To make up for this problem, an EGR system is applied so that NOx might be decreased. In that case, engine power is lowered and exhaust gas is raised. However, the reformed fuel by ultrasonic energy irradiation is changed physically and chemically, promotes combustion, and thus solves such a problem. As the results of the experimemt, we could identify the optimum EGR rate by investigating the engine performance and the characteristics of exhaust materials in accordance with the EGR rate after ultrasonic energy irradiation to BD20 and applying it to common-rail diesel engine. The optimum EGR rate that can satisfy both engine performance and characteristics of exhaust materials was in the range of 15%.

Keywords

References

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