Patents by Inventor Dan Langenderfer

Dan Langenderfer 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).

  • Exhaust throttle control for aftertreatment system thermal management
    Patent number: 9212587
    Abstract: Systems, methods and apparatus are disclosed for thermal management of an SCR catalyst in an exhaust aftertreatment system of an internal combustion engine that includes an exhaust throttle but lacks a particulate filter. The thermal management can include interpreting, initiating, and/or completing a thermal management event for the SCR catalyst for removal of contaminants such as hydrocarbons and urea deposits. The thermal management event includes at least one of closing the exhaust throttle and increasing the thermal output of the engine to expose the SCR catalyst to a sufficiently high temperature over a time period that desorbs a sufficient amount of the hydrocarbons and/or removes a sufficient amount of the urea deposits to restore SCR catalyst performance.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: December 15, 2015
    Assignee: Cummins Inc.
    Inventors: Jennifer Kay Light-Holets, C. Larry Bruner, Dan Langenderfer
  • EXHAUST THROTTLE CONTROL FOR AFTERTREATMENT SYSTEM THERMAL MANAGEMENT
    Publication number: 20150240686
    Abstract: Systems, methods and apparatus are disclosed for thermal management of an SCR catalyst in an exhaust aftertreatment system of an internal combustion engine that includes an exhaust throttle but lacks a particulate filter. The thermal management can include interpreting, initiating, and/or completing a thermal management event for the SCR catalyst for removal of contaminants such as hydrocarbons and urea deposits. The thermal management event includes at least one of closing the exhaust throttle and increasing the thermal output of the engine to expose the SCR catalyst to a sufficiently high temperature over a time period that desorbs a sufficient amount of the hydrocarbons and/or removes a sufficient amount of the urea deposits to restore SCR catalyst performance.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 27, 2015
    Applicant: Cummins Inc.
    Inventors: Jennifer Kay Light-Holets, C. Larry Bruner, Dan Langenderfer