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Title: Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device

Abstract

A method for monitoring a hydrocarbon-selective catalytic reactor device of an exhaust aftertreatment system of an internal combustion engine operating lean of stoichiometry includes injecting a reductant into an exhaust gas feedstream upstream of the hydrocarbon-selective catalytic reactor device at a predetermined mass flowrate of the reductant, and determining a space velocity associated with a predetermined forward portion of the hydrocarbon-selective catalytic reactor device. When the space velocity exceeds a predetermined threshold space velocity, a temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is determined, and a threshold temperature as a function of the space velocity and the mass flowrate of the reductant is determined. If the temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is below the threshold temperature, operation of the engine is controlled to regenerate the hydrocarbon-selective catalytic reactor device.

Inventors:
; ; ; ; ; ;
Issue Date:
Research Org.:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1130964
Patent Number(s):
8,713,914
Application Number:
12/568,754
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
DOE Contract Number:  
FC26-02NT41218
Resource Type:
Patent
Resource Relation:
Patent File Date: 2009 Sep 29
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS

Citation Formats

Schmieg, Steven J, Viola, Michael B, Cheng, Shi-Wai S, Mulawa, Patricia A, Hilden, David L, Sloane, Thompson M, and Lee, Jong H. Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device. United States: N. p., 2014. Web.
Schmieg, Steven J, Viola, Michael B, Cheng, Shi-Wai S, Mulawa, Patricia A, Hilden, David L, Sloane, Thompson M, & Lee, Jong H. Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device. United States.
Schmieg, Steven J, Viola, Michael B, Cheng, Shi-Wai S, Mulawa, Patricia A, Hilden, David L, Sloane, Thompson M, and Lee, Jong H. Tue . "Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device". United States. https://www.osti.gov/servlets/purl/1130964.
@article{osti_1130964,
title = {Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device},
author = {Schmieg, Steven J and Viola, Michael B and Cheng, Shi-Wai S and Mulawa, Patricia A and Hilden, David L and Sloane, Thompson M and Lee, Jong H},
abstractNote = {A method for monitoring a hydrocarbon-selective catalytic reactor device of an exhaust aftertreatment system of an internal combustion engine operating lean of stoichiometry includes injecting a reductant into an exhaust gas feedstream upstream of the hydrocarbon-selective catalytic reactor device at a predetermined mass flowrate of the reductant, and determining a space velocity associated with a predetermined forward portion of the hydrocarbon-selective catalytic reactor device. When the space velocity exceeds a predetermined threshold space velocity, a temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is determined, and a threshold temperature as a function of the space velocity and the mass flowrate of the reductant is determined. If the temperature differential across the predetermined forward portion of the hydrocarbon-selective catalytic reactor device is below the threshold temperature, operation of the engine is controlled to regenerate the hydrocarbon-selective catalytic reactor device.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {5}
}

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