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:
Oct. 16, 2012
Filed:
Oct. 27, 2009
Stephen Paul Levijoki, Swartz Creek, MI (US);
Scott R. Gordon, Ann Arbor, MI (US);
Cheryl J Stark, Canton, MI (US);
Paul Jasinkiewicz, Northville, MI (US);
Brett B Thompson, Farmington Hills, MI (US);
Stephen Paul Levijoki, Swartz Creek, MI (US);
Scott R. Gordon, Ann Arbor, MI (US);
Cheryl J Stark, Canton, MI (US);
Paul Jasinkiewicz, Northville, MI (US);
Brett B Thompson, Farmington Hills, MI (US);
Abstract
An exhaust diagnostic system includes a selective catalyst reduction (SCR) efficiency testing module that determines an efficiency of a SCR catalyst. An exhaust gas temperature management module selectively adjusts a temperature of the SCR catalyst to a predetermined temperature range using intrusive exhaust gas temperature management. A test enabling module initiates an SCR efficiency test using the SCR efficiency module after failing a prior SCR efficiency test and while the temperature of the SCR catalyst is within the predetermined temperature range.