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:
Sep. 05, 2017
Filed:
Jun. 25, 2014
Applicant:
Ford Global Technologies, Llc, Dearborn, MA (US);
Inventors:
David G. Hagner, Beverly Hills, MI (US);
Mrdjan J. Jankovic, Birmingham, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/14 (2006.01); F02D 41/00 (2006.01); F02D 41/24 (2006.01);
U.S. Cl.
CPC ...
F02D 41/1497 (2013.01); F02D 41/009 (2013.01); F02D 41/0025 (2013.01); F02D 41/2454 (2013.01); F02D 41/2461 (2013.01); F02D 2041/001 (2013.01); F02D 2200/0402 (2013.01); F02D 2200/0411 (2013.01);
Abstract
Methods and systems for correcting cam angle measurements for engine-to-engine build variation are disclosed. In one example, a method comprises learning cam angle corrections to update a measured cam angle responsive to air-fuel ratio errors during selected conditions, and learning air and fueling errors responsive to the air-fuel ratio error otherwise. In this way, cam angle errors due to engine build variation may be corrected, thereby improving other air and fuel adaptation methods and improving engine emissions.