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:
Nov. 03, 2020
Filed:
Mar. 26, 2019
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Tyler Kelly, Plymouth, MI (US);
Adam Krach, Canton, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/22 (2006.01); F02D 41/00 (2006.01); G01M 15/09 (2006.01); F01L 13/00 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0087 (2013.01); F02D 41/221 (2013.01); G01M 15/09 (2013.01); F01L 13/0005 (2013.01); F01L 2800/00 (2013.01); F02D 2041/0012 (2013.01); F02D 2200/0406 (2013.01);
Abstract
Methods and systems are provided for diagnosing valve operation during a cylinder deactivation event in a variable displacement engine. Crankshaft acceleration data is captured during an exhaust stroke of a deactivated cylinder and compared to a calibrated map of crankshaft acceleration data for the given cylinder. Based on the comparison, it may be indicated that the deactivation of the exhaust valve of the given cylinder is degraded, and that the exhaust valve is open when commanded closed.