Patents by Inventor Charles E. Southwell

Charles E. Southwell 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).

  • Closed loop fuel control system with hysteresis
    Patent number: 5435290
    Abstract: A closed loop fuel control system for controlling air/fuel ratio in response to exhaust gas oxygen signals includes a selective hysteresis function to prevent high frequency switching after a noise spike. This improves fuel control system noise protection without introducing permanent time delays.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: July 25, 1995
    Assignee: Ford Motor Company
    Inventors: Alexander Y. Gopp, Charles E. Southwell