Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지
DOI QR코드

DOI QR Code

The Experimental Research of LNT for 3L-DME Engine

3리터급 DME 엔진용 LNT 후처리 장치 연구

  • Jang, Jinyoung (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Lee, Youngjae (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Pyo, Youngduk (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Cho, Chongpyo (Energy Efficiency Department, Korea Institute of Energy Research) ;
  • Woo, Youngmin (Energy Efficiency Department, Korea Institute of Energy Research)
  • 장진영 (한국에너지기술연구원 에너지효율연구단) ;
  • 이영재 (한국에너지기술연구원 에너지효율연구단) ;
  • 표영덕 (한국에너지기술연구원 에너지효율연구단) ;
  • 조종표 (한국에너지기술연구원 에너지효율연구단) ;
  • 우영민 (한국에너지기술연구원 에너지효율연구단)
  • Received : 2013.03.21
  • Accepted : 2013.05.23
  • Published : 2013.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study is aimed to develop LNT(Lean NOx Trap) aftertreatment system for DME engine. Modified DME engine, which was changed from diesel to current DME engine, is used for this research and is equipped with common rail type injector and fuel supplying system. LNT system has reductant injector. DME is also used as reduction agent. For this research, reduction agent injection time width and interval were varied. And also, swirler was used to improve homogeneity of reducing agent in exhaust pipe. The reduction rate of NOx by LNT was increased by longer injection width, short interval and swirler. The maximum diminution of NOx by LNT was over 85%.

Keywords

References

  1. T. Fleisch, C. McCarthy, A. Basu and C. Udovich, "A New Clean Diesel Technology Demonstration of ULEV Emissions on a Navistar Diesel Engine Fueled with Dimethyl Ether," SAE 950061, 1995.
  2. J. McCandless, "A Production DME Fuel System; Tank to Cylinder," 4th Asian DME Conference, 2007.
  3. A. Shoji, S. Kamamoshita, T. Watanabe and T. Tanaka, "Development of a Simultaneous Reduction System of NOx and Particulate Matter for Light-duty Truck," SAE 2004-01-0579, 2004.
  4. C. Park, C. Kim, Y. Choi and K. Kang, "Performance of LNT Catalyst according to the Supply Condition of Hydrogen Reductants for Diesel Engine," Transactions of KSAE, Vol.17, No.3, pp.142-148, 2009.
  5. S. Park and B. Choi, "Combined System of SR+LNT to Improve Performance of de-NOx Catalyst for DME Engines," KSAE Annual Conference Proceedings, pp.653-658, 2010.
  6. C. Lee, Y. Park, Y. Yoon, S. Lee and Y. Cho, "An Experimental Study on NOx Reduction Characteristics of the LNT System with Various Exhaust Gas Temperature and Space Velocity for DME Engine," KSAE Annual Conference Proceedings, pp.383-388, 2011.
  7. J. Oh, K. Lee and J. Lee, "Spray Behavior and NOx Reduction Characteristics of External Injection for HC-LNT Catalyst System," KSAE Fall Conference Proceedings, pp.221-226, 2007.
  8. J. Lim, Y. Yoon, C. Song, Y. Park, S. Lee and Y. Cho, "A Numerical Analysis of Improved Reductant Concentration for Absorbing LNT Catalyst with Injection Method and Shape of Diffuser," KSAE Annual Conference Proceedings, pp.815-820, 2009.