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. 27, 2020
Filed:
Oct. 14, 2019
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Michael Shelby, Plymouth, MI (US);
Joseph Ulrey, St. Joseph, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/06 (2006.01); F02D 41/00 (2006.01); F01L 13/00 (2006.01); F02D 41/04 (2006.01); F02N 11/00 (2006.01);
U.S. Cl.
CPC ...
F02D 41/061 (2013.01); F01L 13/0005 (2013.01); F02D 41/0087 (2013.01); F02D 41/042 (2013.01); F01L 2013/001 (2013.01); F01L 2201/00 (2013.01); F02D 2200/021 (2013.01); F02N 11/00 (2013.01);
Abstract
Methods and systems are provided for diagnosing a cylinder valve deactivation mechanism in an engine system having cam-actuated valves. Movement of a latch pin of the deactivation mechanism is inferred from an induction current generated by a solenoid coupled to the latch pin, and the inferred movement is used to diagnose operation of cylinder valve deactivation mechanism. The inferred movement and a profile of the induction current is also used to estimate camshaft and crankshaft timing for improved cylinder fuel delivery in the absence of a camshaft sensor.