Patents by Inventor John A. J. Griffiths

John A. J. Griffiths 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).

  • Method for determining fuel injection on-time in a gaseous-fuelled internal combustion engine
    Patent number: 8095294
    Abstract: A method and apparatus determine the fuel injection on-time to accurately meter fuel injected directly into the combustion chamber of a gaseous fuelled internal combustion engine. The fuel injection on-time is determined by interpolating between values retrieved from two of a plurality of predetermined look-up tables, which each define fuel injection on-time as a function of gaseous fuel rail pressure and fuelling amount. Each table corresponds to a fixed value of a third parameter that correlates to in-cylinder pressure.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: January 10, 2012
    Assignee: Westport Power Inc.
    Inventors: John A. J. Griffiths, Olivier P. M. Lebastard