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:
Dec. 03, 2019
Filed:
Sep. 29, 2017
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Erol Dogan Sumer, Ann Arbor, MI (US);
Yan Wang, Ann Arbor, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01); G01K 7/42 (2006.01); F02D 13/02 (2006.01); F01L 1/344 (2006.01); F01M 11/00 (2006.01); F01M 11/10 (2006.01); F02D 41/00 (2006.01); F01L 1/053 (2006.01);
U.S. Cl.
CPC ...
G01K 7/427 (2013.01); F01L 1/3442 (2013.01); F01L 1/34409 (2013.01); F02D 13/0219 (2013.01); F01L 2001/0535 (2013.01); F01L 2001/3443 (2013.01); F01L 2001/34456 (2013.01); F01L 2250/02 (2013.01); F01L 2250/04 (2013.01); F01L 2800/05 (2013.01); F01L 2800/11 (2013.01); F01L 2820/01 (2013.01); F01M 2011/0045 (2013.01); F01M 2011/1473 (2013.01); F02D 13/0207 (2013.01); F02D 2041/001 (2013.01); F02D 2200/023 (2013.01);
Abstract
Methods and systems are provided for estimating engine oil temperature during conditions when sensors used for engine oil temperature measurement are not functional or not reliable. A null duty cycle of a solenoid spool valve of a variable cam timing mechanism is estimated. Then, a calibrated relationship between the duty cycle, an angular velocity of the associated cam, and the engine oil temperature is used to estimate an engine oil temperature when existing sensors used in the calculation of engine oil temperature calculation become unreliable.