Patents by Inventor William R. Cadman

William R. Cadman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • PURGE FLOW CONTROL TO REDUCE AIR/FUEL RATIO IMBALANCE
    Publication number: 20080178852
    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.
    Type: Application
    Filed: January 30, 2007
    Publication date: July 31, 2008
    Inventors: Gregory E. Labus, Jerry W. Kortge, William R. Cadman
  • Purge flow control to reduce air/fuel ratio imbalance
    Patent number: 7401600
    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.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: July 22, 2008
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Gregory E. Labus, Jerry W. Kortge, William R. Cadman