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:
Apr. 21, 2015
Filed:
Nov. 13, 2013
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Devesh Upadhyay, Canton, MI (US);
In Kwang Yoo, Ann Arbor, MI (US);
Michiel J. Van Nieuwstadt, Ann Arbor, MI (US);
David John Kubinski, Canton, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 11/00 (2006.01); F01N 3/18 (2006.01); F01N 3/20 (2006.01);
U.S. Cl.
CPC ...
F01N 3/18 (2013.01); F01N 2900/0416 (2013.01); F01N 3/208 (2013.01); F01N 3/206 (2013.01); F01N 2560/026 (2013.01); F01N 2560/021 (2013.01); F01N 2610/146 (2013.01); F01N 2550/05 (2013.01); F01N 11/00 (2013.01);
Abstract
Various systems and method for detecting exhaust NOsensor degradation are disclosed. In one example, degradation of the NOsensor is indicated responsive to reductant injection in an exhaust passage under engine off conditions. For example, degradation of the NOsensor is indicated when an actual NOsensor output differs from an expected NOsensor output by more than a threshold amount.