Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Experimental Investigation on DeNOx Performance according to the Urea-SCR System Control at Various Operating Conditions for Diesel Engines

디젤엔진의 운전조건 변화 및 Urea-SCR 시스템 제어에 따른 DeNOx 성능에 대한 실험적 연구

  • Han, Jung-Won (School of Mechanical Engineering, Graduate School of Korea University) ;
  • Gong, Ho-Jeong (School of Mechanical Engineering, Graduate School of Korea University) ;
  • Hwang, In-Goo (School of Mechanical Engineering, Graduate School of Korea University) ;
  • Myung, Cha-Lee (School of Mechanical Engineering, Korea University) ;
  • Park, Sim-Soo (School of Mechanical Engineering, Korea University)
  • 한정원 (고려대학교 대학원 기계공학과) ;
  • 공호정 (고려대학교 대학원 기계공학과) ;
  • 황인구 (고려대학교 대학원 기계공학과) ;
  • 명차리 (고려대학교 기계공학부) ;
  • 박심수 (고려대학교 기계공학부)
  • Received : 2009.12.17
  • Accepted : 2010.04.12
  • Published : 2010.11.01
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Abstract

Recently, as the current and future emission regulations go stringent, the research of NOx reduction has become a subject of increasing interest and attention in diesel engine. Selective Catalytic Reduction (SCR) is one of the effective technology to reduce NOx emission from diesel engine. Especially, Urea-SCR that uses urea as a reductant is becoming increasingly popular as a cost effective way of reducing NOx emissions from heavy duty vehicles. In this research, we designed urea injector and DCU (Dosing Control Unit) specially developed for controlling the Urea-SCR process onboard vehicles. As passenger and commercial diesel engine experiment, we grasped characteristics of NOx emission and SCR catalyst temperature level in advance. As a result, highest NOx emission level was shown in condition of low engine speed and high load. On the other hand, SCR catalyst temperature was highest at high engine speed and load. On the basis of these result, we conducted the NOx reduction test at steady engine operating conditions using the urea injector and DCU. It was shown that 74% NOx conversion efficiency on the average and 97% NOx conversion efficiency was obtained at high SCR catalyst temperature.

Keywords

References

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