Patents by Inventor William Leppard

William Leppard 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).

  • Fuel adaptation in a homogeneous charge compression ignition engine
    Publication number: 20070119417
    Abstract: Operation of a homogeneous charge compression ignition engine is adapted to fuel variations. A variable valve actuating system is employed to effect conditions conducive to homogeneous charge compression ignition operation. Nominal valve timing is selected and adjustments thereto are made based on deviations in combustion phasing from a desired combustion phasing. Fuel delivery timing and quantity are adjusted once valve timing authority limits are reached to achieve further combustion phasing improvement.
    Type: Application
    Filed: October 3, 2006
    Publication date: May 31, 2007
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: James Eng, William Leppard, Paul Najt, Tang-Wei Kuo