Patents by Inventor Thomas A. Brewbaker

Thomas A. Brewbaker 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 system for controlling simultaneous diesel particulate filter regeneration and lean NOx trap desulfation
    Patent number: 6988361
    Abstract: A method and system for simultaneously regenerating a particulate filter coupled to an internal combustion engine and for desulfating a lean NOx trap disposed downstream of the particulate filter. The method includes adjusting at least one engine operating parameter to maintain a desired air fuel ratio for gases exiting the particulate filter in accordance with a difference between a reference set point air fuel ratio level and the air fuel ratio of gases exiting the particulate filter and wherein the reference set point level is changed between a rich air fuel ratio and a lean air fuel ratio as a function of the air fuel ratio of the gases exiting the lean NOx trap.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: January 24, 2006
    Assignee: Ford Global Technologies, LLC
    Inventors: Michiel van Nieuwstadt, John Cavataio, Thomas A. Brewbaker