Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
William R. Cadman0
Gregory E. Labus0
Jerry W. Kortge0
Date of Patent
July 22, 2008
Patent Application Number
11668868
Date Filed
January 30, 2007
Patent Primary Examiner
Patent 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.
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