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. 29, 2012
Filed:
Jun. 09, 2009
Michael B. Viola, Macomb Township, MI (US);
Steven J. Schmieg, Troy, MI (US);
Thompson M. Sloane, Oxford, MI (US);
David L. Hilden, Shelby Township, MI (US);
Patricia A. Mulawa, Clinton Township, MI (US);
Jong H. Lee, Rochester Hills, MI (US);
Shi-wai S. Cheng, Troy, MI (US);
Michael B. Viola, Macomb Township, MI (US);
Steven J. Schmieg, Troy, MI (US);
Thompson M. Sloane, Oxford, MI (US);
David L. Hilden, Shelby Township, MI (US);
Patricia A. Mulawa, Clinton Township, MI (US);
Jong H. Lee, Rochester Hills, MI (US);
Shi-Wai S. Cheng, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for initiating a regeneration mode in selective catalytic reduction device utilizing hydrocarbons as a reductant includes monitoring a temperature within the aftertreatment system, monitoring a fuel dosing rate to the selective catalytic reduction device, monitoring an initial conversion efficiency, selecting a determined equation to estimate changes in a conversion efficiency of the selective catalytic reduction device based upon the monitored temperature and the monitored fuel dosing rate, estimating changes in the conversion efficiency based upon the determined equation and the initial conversion efficiency, and initiating a regeneration mode for the selective catalytic reduction device based upon the estimated changes in conversion efficiency.