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:
Dec. 17, 2013
Filed:
May. 10, 2012
Applicants:
Janean E. Kowalkowski, Northville, MI (US);
John Coppola, Highland, MI (US);
Inventors:
Janean E. Kowalkowski, Northville, MI (US);
John Coppola, Highland, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 15/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A service procedure to test the SCR device involves turning on an upstream and downstream SCR NOx sensor, turning off an NHinjector, running the engine until enough upstream NOx mass has been generated by the engine to deplete any NHload remaining in the SCR device, determining the operational status of the NOx sensors as follows: