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:
Sep. 13, 2011
Filed:
Jun. 03, 2008
Kenneth J. Cinpinski, Ray, MI (US);
Ljubisa M. Mladenovic, Ann Arbor, MI (US);
Jerry W. Kortge, Clarkston, MI (US);
Gregory J. York, Fenton, MI (US);
Kenneth J. Cinpinski, Ray, MI (US);
Ljubisa M. Mladenovic, Ann Arbor, MI (US);
Jerry W. Kortge, Clarkston, MI (US);
Gregory J. York, Fenton, MI (US);
Abstract
A camshaft phasor control system for an engine includes a camshaft position sensor that generates a current camshaft position signal based on position of a camshaft. A first comparator generates a camshaft position signal based on the current camshaft position signal and a crankshaft position. The second comparator generates an error signal based on the relative camshaft position signal and a commanded camshaft position signal. A control module determines a current control hold duty cycle (CHDC) for a camshaft phasor based on an engine state parameter. The control module also generates a correction signal based on the error signal, adjusts the current CHDC based on the correction signal to generate a commanded CHDC signal, and generates another CHDC based on the commanded CHDC signal.