Browse > Article
http://dx.doi.org/10.7467/KSAE.2015.23.2.169

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

Nam, Chungwoo (Graduate School of Mechanical Engineering, Keimyung University)
Han, Manbae (Department of Mechanical and Automotive Engineering, Keimyung University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.23, no.2, 2015 , pp. 169-177 More about this Journal
Abstract
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.
Keywords
Lean $NO_x$ trap; In-cylinder post fuel injection; External fuel injection; Conversion efficiency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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.   DOI
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.   DOI
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.   DOI
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 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.
18 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.   DOI
19 C. Enderle, G. Vent and M. Paule, "Bluetec Diesel Technology - Clean Efficient and Powerful," SAE 2008-01-1182, 2008.
20 J. Hepburn, E. Thanasiu, D. Dobson and W. Watkins, "Experimental and Modeling Investigations of $NO_x$ Trap Performance," SAE 962051, 1996.