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:
Jan. 11, 2005
Filed:
Apr. 15, 2002
David G. Hagner, Birmingham, MI (US);
Mrdjan J. Jankovic, Birmingham, MI (US);
Stephen Lee Cooper, Dearborn, MI (US);
David G. Hagner, Birmingham, MI (US);
Mrdjan J. Jankovic, Birmingham, MI (US);
Stephen Lee Cooper, Dearborn, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system and method for controlling first and second phase shiftable camshafts in a variable cam timing engine is provided. The method includes determining when the first camshaft is moving toward a first scheduled phase angle with respect to the crankshaft with a larger camshaft angular positioning error than the second camshaft. Finally, the method includes slowing down the first camshaft so that synchronized camshaft positioning can be better achieved.