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, 2020
Filed:
Jul. 19, 2018
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Andrew Bagnasco, Plymouth, MI (US);
Edward Fredericks, Wyandotte, MI (US);
Mario Santillo, Canton, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/24 (2006.01); F01N 11/00 (2006.01); F02D 41/14 (2006.01);
U.S. Cl.
CPC ...
F01N 11/007 (2013.01); F02D 41/1441 (2013.01); F02D 41/1456 (2013.01); F02D 41/2474 (2013.01); F01N 2550/02 (2013.01); F01N 2560/025 (2013.01); F01N 2560/14 (2013.01); F01N 2900/0416 (2013.01); F01N 2900/0422 (2013.01);
Abstract
Methods and systems are provided for diagnosing operation of a catalyst in the presence of oxygen sensor degradation over a vehicle life cycle. The methods and systems described herein filter the output of one oxygen sensor according to a time constant of a different oxygen sensor so that determination of a catalyst index ratio is compensated for oxygen sensor degradation.