The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2014
Filed:
Sep. 29, 2009
Steven J. Schmieg, Troy, MI (US);
Michael B. Viola, Macomb Township, MI (US);
Shi-wai S. Cheng, Troy, MI (US);
Patricia A. Mulawa, Clinton Township, WI (US);
David L. Hilden, Shelby Township, MI (US);
Thompson M. Sloane, Oxford, MI (US);
Jong H. Lee, Rochester Hills, MI (US);
Steven J. Schmieg, Troy, MI (US);
Michael B. Viola, Macomb Township, MI (US);
Shi-Wai S. Cheng, Troy, MI (US);
Patricia A. Mulawa, Clinton Township, WI (US);
David L. Hilden, Shelby Township, MI (US);
Thompson M. Sloane, Oxford, MI (US);
Jong H. Lee, Rochester Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
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.