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On-line Estimation of Sulfation Levels in a Lean NOx Trap
Technical Paper
2002-01-0731
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Presented in this paper is an on-line method for estimating the sulfation levels within a lean NOx trap (LNT). Sulfur poisoning plays a major role in the reduction of oxygen and NOx storage capacity in an LNT. Indicators of LNT degradation are LNT NOx absorption efficiency and capacity. The estimation of LNT oxygen and NOx storage capacity is an on-line method of monitoring LNT NOx absorption efficiency and capacity. The estimation provides information regarding the sulfation level of the LNT. This estimate may be used in conjunction with lean burn strategies to initiate an LNT sulfur purging mechanism and maintain maximum fuel economy. In addition, the estimation of LNT oxygen and NOx storage capacity may be used for on-board diagnostics, LNT NOx absorption efficiency estimation, NOx purge fuel estimation, and many other applications. Furthermore, the information must be obtained in such a way that is transparent to the operator and may be implemented on-line during normal drive cycles. This on-line method for estimation of LNT sulfation levels has been demonstrated on a Ford F150 platform.
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Citation
Ingram, G. and Surnilla, G., "On-line Estimation of Sulfation Levels in a Lean NOx Trap," SAE Technical Paper 2002-01-0731, 2002, https://doi.org/10.4271/2002-01-0731.Also In
References
- Heywood J. B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Hepburn J. S. Thanasiu E. Dobson D. A. Watkins W. L. “Experimental and Modeling Investigations of NOx Trap Performance” SAE Paper No. 962051 1996
- Arakawa K. Matsuda S. Kinoshita H. “Progress in Sulfur Poisoning Resistance of Lean NOx Catalysts” SAE Paper No. 980930 1998
- Dou D. Bailey O. H. “Investigation of NOx Adsorber Catalyst Deactivation” SAE Paper No. 982594 1998
- Dearth M. A. Hepburn J. S. Thanasiu E. McKenzie J. Horne G. S. “Sulfur Interaction with Lean NOx Traps: Laboratory and Engine Dynamometer Studies” SAE Paper No. 982595 1998
- Guyon M. Blejean F. Bert C. Faou P. L. “Impact of Sulfur on NOx Trap Catalyst Activity - Study of the Regeneration Conditions” SAE Paper No. 982607 1998
- Goebel U. Hoehne J. Lox E. S. Mueller W. Okumura A. Strehlau W. “Durability Aspects of NOx Storage Catalysts for Direct Injection Gasoline Vehicles” SAE Paper No. 1999-01-1285 1999
- Asanuma T. Takeshima S. Yamashita T. Tanaka T. Murai T. Iguchi S. “Influence of Sulfur Concentration in Gasoline on NOx Storage - Reduction Catalyst” SAE Paper No. 1999-01-3501 1999
- Erkfeldt S. Larsson M. Hedblom H. Skoglundh M. “Sulphur Poisoning and Regeneration of NOx Trap Catalyst for Direct Injected Gasoline Engines” SAE Paper No. 1999-01-3504 1999
- Truex T. J. “Interaction of Sulfur with Automotive Catalysts and the Impact on Vehicle Emissions - A Review” SAE Paper No. 1999-01-1543 1999
- Golovin A. Asik J. R. “Modeling and Experiments for Lean NOx Trap Desulfation by High Frequency A/F Modulation” SAE Paper No. 2000-01-1201 2000
- Jobson E. Salomonsson P. Presis M. Richter T. Tatschl R. Burch R. Krutzsch B. Guyon M. Webster D. Martnes J. A. Lindfors L. “Research Results and Progress in LeaNOx II - A Co-operation for Lean NOx Abatement” SAE Paper No. 2000-01-2909 2000
- Hodjati S. Semelle F. Moral N. Bert C. Rigaud M. “Impact of Sulfur on the NOx Trap Catalyst Activity-Poisoning and Regeneration Behaviour” SAE Paper No. 2000-01-1874 2000
- Asik J. R. Meyer G. M. Dobson D. “Lean NOx Trap Desulfation Through Rapid Air Fuel Modulation” SAE Paper No. 2000-01-1200 2000
- Asik J. R. Dobson D. A. Meyer G. M. “Suppression of Sulfide Emission During Lean NOx Trap Desulfation” SAE Paper No. 2001-01-1299 2001
- Asik J. R. Farkas R. Beier R. Meyer G. M. “Closed Loop Measurement of NOx Storage Capacity and Oxygen Storage Capacity of a Lean NOx Trap” SAE Paper No. 1999-01-1283 1999
- Ketfi-Cherif A. von Wissel D. Beurthey S. Sorine M. “Modeling and Control of a NOx Trap Catalyst” SAE Paper No. 2000-01-1199 2000