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. 03, 2018
Filed:
Oct. 30, 2014
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventor:
Douglas James McEwan, Royal Oak, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 41/00 (2006.01); F02D 41/14 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0085 (2013.01); F02D 41/1441 (2013.01); F02D 41/1454 (2013.01);
Abstract
Methods and systems are provided for detecting cylinder air-fuel imbalance. In one example, a method may include adjusting engine operation based on an indication of cylinder air-fuel imbalance. The imbalance may be detected based on output from a second exhaust gas sensor and a plurality of individual cylinder weighting factors, the second sensor located in an exhaust system downstream of a first sensor located in the exhaust system.