DOI QR코드

DOI QR Code

2.2L 직분사 디젤 엔진에서 LNT 촉매 재생을 위한 환원제 분사 방법 비교

Comparison of the LNT Regeneration Methods in 2.2L Common Rail Direct Injection Diesel Engine

  • 남충우 (계명대학교 대학원 기계공학과) ;
  • 한만배 (계명대학교 기계자동차공학과)
  • Nam, Chungwoo (Graduate School of Mechanical Engineering, Keimyung University) ;
  • Han, Manbae (Department of Mechanical and Automotive Engineering, Keimyung University)
  • 투고 : 2014.06.30
  • 심사 : 2014.11.04
  • 발행 : 2015.03.01

초록

In this study we investigated the regeneration methods for the lean $NO_x$ trap (LNT) catalyst in a 2.2L direct injection diesel engine. The regeneration methods were 1) in-cylinder post fuel injection and 2) external fuel injection strategy. The in-cylinder post fuel injection method uses in-cylinder injectors with the addition of the post fuel injection to supply enough reductants such as CO, $H_2$, THC. The external fuel injection method was enabled by installing a fuel injector with a wide spray angle before the LNT catalyst. Through the engine experiment, the $NO_x$ conversion efficiency, the amount of reductant exhaust gases, fuel consumption, and temperature behavior in the LNT catalyst were evaluated and compared for the two regeneration methods.

키워드

참고문헌

  1. J. M. Oh, K. H. Lee and J. H. Lee, "Spray Behavior and $NO_x$ Reduction Characteristics of External Injection for HC-LNT Catalyst System," KSAE Fall Conference Proceedings, pp.221-226, 2007.
  2. J. M. Oh, K. H. Lee and H. Y. Jeong, "Study on the Spray Behavior and Diesel Fuel Distribution Characteristics of a Secondary Injection for a Lean $NO_x$ Trap Catalyst," Int. J. Energy & Fuel, Vol.22, No.3, pp.1527-1534, 2008. https://doi.org/10.1021/ef800045t
  3. S. Hackenberg and M. Ranalli, "Ammonia on a LNT: Avoid the Formation or Take Advantage of It," SAE 2007-01-1239, 2007.
  4. K. Akihama, Y. Takatori, K. Inagaki, S. Sasakiand and A. Dean, "Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature," SAENo.2001-01-0655, 2001.
  5. S. Kimura, O. Aoki, Y. Kitahara and E. Aiyoshizawa, "Ultra-clean Combustion Technology Combining a Low-temperature and Premixed Combustion Concept for Meeting Future Emission Standard," SAE 2001-01-0200, 2001.
  6. T. Joshan, "Vehicular Emissions in Review," SAE 2012-01-0368, 2012.
  7. F. Yan and J. Wang, "Common Rail Injection System Iterative Learning Control Based Parameter Calibration for Accurate Fuel Injection Quantity Control," Int. J. Automotive Technology, Vol.12, No.2, pp.149-157, 2011. https://doi.org/10.1007/s12239-011-0019-7
  8. R. Bosch GmbH, Expert Know-how on Automotive Technology : Diesel-engine Management, Piochingen, pp.4-129, 2003.
  9. S. Hackenberg and M. Ranalli, "Ammonia on a LNT: Avoid the Formation or Take Advantage of It," SAE 2007-01-1239, 2007.
  10. G. W. Nam, J. W. Park, J. H. Lee and G. K. Yeo, "The Effect of an External Fuel Injection on the Control of LNT System; the Diesel $NO_x$ Reduction System," SAE 2007-01-1241, 2007.
  11. I. Hachisuka, T. Yoshida, H. Ueno and N. Takahashi, "Improvement of $NO_x$ Storagereduction Catalyst," SAE 2002-01-0732, 2002.
  12. M. Ueda, A. Asamo, T. Kondo, Y. Watanabe, T. Fukuma and Y. Harada, "A New Optimizing, Technique of a Diesel Engine Aftertreatment System Using HC De$NO_x$ Catalyst," Int. J. JSAE Review, Vol.24, No.1, pp.47-51, 2003. https://doi.org/10.1016/S0389-4304(02)00249-7
  13. K. Nguyen, H. Kim, B. Bunting, T. Toops and C. S. Yoon, "Rapid Aging of Diesel Lean $NO_x$ Traps by Hight-temperature Thermal Cycling," SAE 2007-01-0470, 2007.
  14. C. W. Park, C. G. Kim, Y. Choi and K. Y. Kang, "Lean $NO_x$ Trap Catalyst for Passenger Diesel Engine," KSAE Annual Conference Proceedings, pp.546-551, 2008.
  15. J. Parks, B. West, M. Swartz and S. Huff, "Characterization of Lean $NO_x$ Trap Catalysts with In-cylinder Regeneration Strategies," SAE 2008-01-0448, 2008.
  16. Y. Bisaiji, K. Yoshida, M. Inoue, K. Umemoto and T. Fukuma, "Development of Di-Air -A New Diesel de$NO_x$ System by Adsorbed Intermediate Reductants," SAE 2011-01-2089, 2011.
  17. W. S. Epling, L. E. Campbell, A. Yezerets, N. W. Currier and J. E. Parks, "Overview of the Fundamental Reactions and Degradation Mechanisms of $NO_x$ Storage/Reduction Catalysts," Int. J. Catalysis Reviews, Vol.46, No.2, pp.163-245, 2004. https://doi.org/10.1081/CR-200031932
  18. C. Enderle, G. Vent and M. Paule, "Bluetec Diesel Technology - Clean Efficient and Powerful," SAE 2008-01-1182, 2008.
  19. J. Hepburn, E. Thanasiu, D. Dobson and W. Watkins, "Experimental and Modeling Investigations of $NO_x$ Trap Performance," SAE 962051, 1996.
  20. T. Morita, N. Suzuki, N. Satoh, K. Wada and H. Ohno, "Study on Low $NO_x$ Emission Control Using Newly Developed Lean $NO_x$ Catalyst for Diesel Engines," SAE 2007-01-0239, 2007.