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. 13, 2009
Filed:
Aug. 23, 2005
John E. Rollinger, Sterling Heights, MI (US);
Paul A. Pietrzyk, Beverly Hills, MI (US);
Michael Sweppy, Manchester, MI (US);
Eric A. Luehrsen, Royal Oak, MI (US);
Robert M. Grant, Farmington Hills, MI (US);
John E. Rollinger, Sterling Heights, MI (US);
Paul A. Pietrzyk, Beverly Hills, MI (US);
Michael Sweppy, Manchester, MI (US);
Eric A. Luehrsen, Royal Oak, MI (US);
Robert M. Grant, Farmington Hills, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for operating an engine having a variable cam timing control system, for controlling a camshaft angle in such engine. The method includes deactivating the variable cam timing system and setting the camshaft angle to a predetermined angle for a predetermined duration after failure in a sensor used to control the variable cam timing system and then reactivating the variable cam timing system after such predetermined time. The deactivating continues during the predetermined duration in the presence of a subsequent failure of the sensor during the predetermined duration. The reactivating comprises driving the cam angle to a camshaft angle established by the variable cam timing system in a predetermined manner. The reactivating occurs over a predetermined reactivation time.