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

Patent ·
OSTI ID:1130964
; ; ; ; ; ;

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.

Research Organization:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-02NT41218
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
Patent Number(s):
8,713,914
Application Number:
12/568,754
OSTI ID:
1130964
Resource Relation:
Patent File Date: 2009 Sep 29
Country of Publication:
United States
Language:
English

References (8)

Diesel aftertreatment systems patent January 2006
Method for control of exhaust gas purification system, and exhaust gas purification system patent September 2010
Exhaust gas purifying apparatus for internal combustion engine patent November 2011
Exhaust emission control and diagnostics patent-application March 2004
Engine Control for a Vehicle Equipped with an Emission Control Device patent-application July 2004
Method of Exhaust Gas Purification and Exhaust Gas Purification System patent-application November 2007
Exhaust Gas Purifying Apparatus for Internal Combustion Engine patent-application February 2010
Exhaust Gas After Treatment System patent-application June 2010

Cited By (4)

Systems and methods for determining the quantity of a combustion product in a vehicle exhaust patent March 2017
Method of controlling operation of an exhaust fluid treatment apparatus patent December 2016
Diagnostics for hydrocarbon injection for filter regeneration patent June 2015
Systems and methods for determining the quantity of a combustion product in a vehicle exhaust patent March 2015

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