Diagnostic methods for a high efficiency exhaust aftertreatment system
Abstract
A method includes acquiring nitrogen oxide (NOx) data indicative of a first amount of NOx in an exhaust flow exiting an engine and a second amount of NOx in the exhaust flow exiting an exhaust aftertreatment system coupled to the engine where the exhaust aftertreatment system including a selective catalytic reduction (SCR) system including a SCR catalyst; determining a NOx conversion efficiency fault is present within the exhaust aftertreatment system based on the first amount of NOx and the second amount of NOx; monitoring an actual amount of NOx in the exhaust flow downstream of the SCR catalyst; determining an expected amount of NOx downstream of the SCR catalyst; and determining the SCR catalyst is responsible for the NOx conversion efficiency fault in response to the actual amount of NOx differing from the expected amount of NOx by more than a threshold amount.
- Inventors:
- Issue Date:
- Research Org.:
- Cummins Inc., Columbus, IN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 2222110
- Patent Number(s):
- 11725564
- Application Number:
- 16/989,109
- Assignee:
- Cummins Inc. (Columbus, IN)
- DOE Contract Number:
- EE0004125
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 08/10/2020
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Gupta, Aniket, Cunningham, Michael J., Haas, Michael, and Kothandaraman, Govindarajan. Diagnostic methods for a high efficiency exhaust aftertreatment system. United States: N. p., 2023.
Web.
Gupta, Aniket, Cunningham, Michael J., Haas, Michael, & Kothandaraman, Govindarajan. Diagnostic methods for a high efficiency exhaust aftertreatment system. United States.
Gupta, Aniket, Cunningham, Michael J., Haas, Michael, and Kothandaraman, Govindarajan. Tue .
"Diagnostic methods for a high efficiency exhaust aftertreatment system". United States. https://www.osti.gov/servlets/purl/2222110.
@article{osti_2222110,
title = {Diagnostic methods for a high efficiency exhaust aftertreatment system},
author = {Gupta, Aniket and Cunningham, Michael J. and Haas, Michael and Kothandaraman, Govindarajan},
abstractNote = {A method includes acquiring nitrogen oxide (NOx) data indicative of a first amount of NOx in an exhaust flow exiting an engine and a second amount of NOx in the exhaust flow exiting an exhaust aftertreatment system coupled to the engine where the exhaust aftertreatment system including a selective catalytic reduction (SCR) system including a SCR catalyst; determining a NOx conversion efficiency fault is present within the exhaust aftertreatment system based on the first amount of NOx and the second amount of NOx; monitoring an actual amount of NOx in the exhaust flow downstream of the SCR catalyst; determining an expected amount of NOx downstream of the SCR catalyst; and determining the SCR catalyst is responsible for the NOx conversion efficiency fault in response to the actual amount of NOx differing from the expected amount of NOx by more than a threshold amount.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2023},
month = {8}
}
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Works referenced in this record:
Multi-Stage SCR Control and Diagnostic System
patent-application, April 2015
- Qi, Baohua
- US Patent Application 14/503414; 20150096287
Method for Operating a Reductant Metering Process of an SCR Catalytic Converter System, and Corresponding SCR Catalytic Converter System
patent-application, May 2015
- Nigro, Giampaolo; Kosters, Martina; Dusterdiek, Thorsten
- US Patent Application 14/405089; 20150147250
Apparatus, system, and method for reducing NOx emissions on an SCR catalyst
patent, September 2012
- Wills, Joan M.; Chi, John N.; Wang, Weiwen
- US Patent Document 8,256,208
System and Method for Determining Selective Catalytic Reduction Dosing System Performance Using an Ammonia Sensor
patent-application, June 2012
- Levijoki, Stephen Paul; Perrin, James M.
- US Patent Application 12/965073; 2012/0144801
Systems and Methods to Mitigate NOX and HC Emissions
patent-application, August 2015
- Gupta, Aniket; Cunningham, Michael J.; Ruth, Michael J.
- US Patent Application 14/600262; 2015/0240682
Soot Load Determination System
patent-application, March 2015
- DeGeorge, John W.; Gardener, Timothy P.
- US Patent Application 14/032665; 20150086426
Robust design of diagnostic enabling conditions for SCR NOx conversion efficiency monitor
patent, January 2012
- Wang, Yue-Yun; Yanakiev, Ognyan N.; Solbrig, Charles E.
- US Patent Document 8,091,416
Method for the Purification of Diesel Engine Exhaust Gases
patent-application, August 2015
- Wittrock, Meike; Klein, Ulf; Leyh, Gerald
- US Patent Application 14/622469; 20150231565
Apparatus, system, and method for estimating deterioration of a NOx sensor response rate
patent, December 2012
- Runde, Jeff; Lin, Xiao; Wilhelm, Daniel D.
- US Patent Document 8,336,525
Exhaust Gas Aftertreatment Installation and Method
patent-application, July 2006
- Bandl-Konrad, Brigitte; Hertzberg, Andreas; Krutzsch, Bernd
- US Patent Application 10/541311; 20060153761