Patents by Inventor Ian G. Stahl

Ian G. Stahl 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).

  • Displacement on demand spark knock detection
    Patent number: 6763297
    Abstract: False spark knock detection is minimized for a displacement on demand engine having activated and deactivated modes. The engine is operated in the activated mode. Knock detection is performed on all cylinders of the engine during the activated mode. The engine is operated in the deactivated mode. Knock detection is performed on activated cylinders during the deactivated mode. Knock detection is disabled for deactivated cylinders during the deactivated mode.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: July 13, 2004
    Assignee: General Motors Corporation
    Inventors: Ian G. Stahl, Alfred E. Spitza, Jr.