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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.:

US 8186151 B1

PDFFull Text
Expired
Date of Patent:
May. 29, 2012

Filed:

Jun. 09, 2009

Method to monitor hc-scr catalyst nox reduction performance for lean exhaust applications

Applicants:

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);

Inventors:

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);

Assignee:

GM Global Technology Operations LLC, Detroit, MI (US);

Attorney:
Primary Examiner:

Thomas Denion

Assistant Examiner:

Jesse Bogue

Int. Cl.
CPC ...
F01N 3/00 (2006.01);
U.S. Cl.
CPC ...
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.

Find Patent Forward Citations

Viola, Michael. (2012). Method to monitor hc-scr catalyst nox reduction performance for lean exhaust applications (U.S. Patent No. 8186151). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8186151

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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