Patents by Inventor Patrick D. Barasa

Patrick D. Barasa 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).

  • Patent number: 7299626
    Abstract: A method for operating an internal combustion engine (100) and exhaust system therefor includes the step of initiating a regeneration event in a diesel particulate filter (DPF 109) (401). A first oxygen concentration (213) of a gas upstream of the DPF 109, and a second oxygen concentration (215) of the gas downstream of the DPF 109 are sensed (403) to infer a rate of combustion of material in the DPF (405) based on the difference between the first (213) and the second (215) oxygen concentrations. The rate of combustion is compared to a threshold value (409) and the regeneration event in the DPF 109 is terminated (411) if the rate of combustion is above the threshold.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: November 27, 2007
    Assignee: International Engine Intellectual Property Company, LLC
    Inventors: Patrick D. Barasa, Timothy J. Gundrum
  • Patent number: 7047730
    Abstract: De-sulfurizing a NOx adsorber catalyst (48) without significantly increasing the temperature of exhaust gases leaving the engine exhaust manifold (42) by using a diesel oxidation catalyst (46) between the exhaust manifold and the NOx adsorber catalyst to elevate exhaust gas temperature entering the NOx adsorber catalyst to suitable de-sulfurizing temperature through control of certain aspects of engine operation (24, 28, 52).
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: May 23, 2006
    Assignee: International Engine Intellectual Property Company, LLC
    Inventors: Xinlei Wang, Patrick D. Barasa, Justin M. O'Connor, Shouxian Ren