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:
Jul. 22, 2008
Filed:
Jan. 30, 2007
Applicants:
Gregory E. Labus, West Chester, PA (US);
Jerry W. Kortge, Clarkston, MI (US);
William R. Cadman, Fenton, MI (US);
Inventors:
Gregory E. Labus, West Chester, PA (US);
Jerry W. Kortge, Clarkston, MI (US);
William R. Cadman, Fenton, MI (US);
Assignee:
GM Global Technology Operations, Inc., Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 33/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fuel control system that regulates a purge flow from a fueling system to an engine includes a sensor that monitors an engine speed and a first module that determines a PWM frequency of a purge valve based on the engine speed. The PWM frequency includes a first period that is based on a second period that corresponds to two engine cycles. A second module regulates the purge valve based on the PWM frequency during engine operation.