Patents by Inventor Thomas J. Sobtzak

Thomas J. Sobtzak 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).

  • Stratified particulate filter regeneration system
    Patent number: 8505284
    Abstract: An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a hydrocarbon supply, a particulate filter (“PF”), at least one sensor, a first temperature sensor, a second temperature sensor, and a control module. The PF is in fluid communication with the exhaust gas conduit and has a filter structure for removal of particulates in the exhaust gas. The filter structure has an innermost region and an outermost region. The PF is selectively regenerated during operation of the internal combustion engine. The PF has a stratified temperature structure that causes the particulates trapped at the innermost region of the PF burn off before the particulates trapped in the outermost region of the PF during regeneration. The control module has a memory with an infinite stage temperature control curve stored thereon.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: August 13, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Jianwen Li, Rahul Mital, Michael V. Taylor, Thomas Larose, Jr., Thomas J. Sobtzak, Paul Jasinkiewicz, Rebecca J. Darr
  • STRATIFIED PARTICULATE FILTER REGENERATION SYSTEM
    Publication number: 20130025266
    Abstract: An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a hydrocarbon supply, a particulate filter (“PF”), at least one sensor, a first temperature sensor, a second temperature sensor, and a control module. The PF is in fluid communication with the exhaust gas conduit and has a filter structure for removal of particulates in the exhaust gas. The filter structure has an innermost region and an outermost region. The PF is selectively regenerated during operation of the internal combustion engine. The PF has a stratified temperature structure that causes the particulates trapped at the innermost region of the PF burn off before the particulates trapped in the outermost region of the PF during regeneration. The control module has a memory with an infinite stage temperature control curve stored thereon.
    Type: Application
    Filed: July 26, 2011
    Publication date: January 31, 2013
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Jianwen LI, Rahul Mital, Michael V. Taylor, Thomas Larose, JR., Thomas J. Sobtzak, Paul Jasinkiewicz, Rebecca J. Darr