Patents by Inventor Kendall T. Duffield

Kendall T. Duffield 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 AND APPARATUS FOR ACTIVATING A DIESEL PARTICULATE FILTER WITH ENGINE HEAT
    Publication number: 20080196388
    Abstract: An apparatus, including a diesel particulate filter, at least one sensor for sensing information associated with operation of an engine, an engine brake configured to brake the engine, and a controller electrically coupled to the at least one sensor and the engine brake, to determine if the engine is operating in a manner that does not generate enough engine heat to activate the diesel particulate filter, and if the engine is so operating, operate the engine brake so as to brake the engine to cause the engine to generate enough engine heat to activate the diesel particulate filter. An associated method is disclosed.
    Type: Application
    Filed: February 21, 2007
    Publication date: August 21, 2008
    Inventors: Randall J. Johnson, Kendall T. Duffield