Patents by Inventor John David Powell

John David Powell 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).

  • Ignition timing control method and apparatus
    Patent number: 4063538
    Abstract: A method and apparatus for controlling the ignition timing in an internal combustion engine. The angular position of peak cylinder pressure is measured and to the extent such angular position deviates from a preselected set point, the time of spark ignition is advanced or retarded to restore the position of peak cylinder pressure to the set point.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: December 20, 1977
    Assignee: The Board of Trustees of Leland Stanford Junior University
    Inventors: John David Powell, Mont Hubbard, Robert R. Clappier