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Title: Diagnostic methods for a high efficiency exhaust aftertreatment system

Abstract

A method includes interpreting NOx data indicative of an amount of NOx exiting an engine and an amount of NOx exiting an exhaust aftertreatment system coupled to the engine, determining a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system, and determining at least one of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system and a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.

Inventors:
; ; ;
Issue Date:
Research Org.:
Cummins, Inc., Columbus, IN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1735129
Patent Number(s):
10738671
Application Number:
15/866,776
Assignee:
Cummins Inc. (Columbus, IN)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
DOE Contract Number:  
EE0004125
Resource Type:
Patent
Resource Relation:
Patent File Date: 01/10/2018
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., 2020. 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/1735129.
@article{osti_1735129,
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 interpreting NOx data indicative of an amount of NOx exiting an engine and an amount of NOx exiting an exhaust aftertreatment system coupled to the engine, determining a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system, and determining at least one of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system and a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {8}
}

Works referenced in this record:

Apparatus, system, and method for estimating deterioration of a NOx sensor response rate
patent, December 2012


Robust design of diagnostic enabling conditions for SCR NOx conversion efficiency monitor
patent, January 2012


Apparatus, system, and method for reducing NOx emissions on an SCR catalyst
patent, September 2012