Patents by Inventor John Carson Wall

John Carson Wall 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).

  • Powertrain controls including transient torque management with dynamic release compensation
    Patent number: 9707968
    Abstract: One exemplary embodiment is a method of controlling a vehicle system including an engine, a transmission, and a control system in operative communication with and structured to control operation of the engine and the transmission. The method determines an operating point of the engine including an engine torque and an engine speed and evaluates a relationship between the operating point and a soft limit on engine torque. The method modifies the soft limit to permit operation outside a boundary of the un-modified soft limit. Modification of the soft limit is constrained by a non-adjustable limit. The operating point of the engine is adjusted to increase engine torque above the boundary of the un-modified soft limit. The method may mitigate a vehicle speed lug event and/or avoid a transmission shift event.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: July 18, 2017
    Assignee: Cummins Inc.
    Inventors: John Carson Wall, Vivek Anand Sujan
  • POWERTRAIN CONTROLS INCLUDING TRANSIENT TORQUE MANAGEMENT WITH DYNAMIC RELEASE COMPENSATION
    Publication number: 20160039418
    Abstract: One exemplary embodiment is a method of controlling a vehicle system including an engine, a transmission, and a control system in operative communication with and structured to control operation of the engine and the transmission. The method determines an operating point of the engine including an engine torque and an engine speed and evaluates a relationship between the operating point and a soft limit on engine torque. The method modifies the soft limit to permit operation outside a boundary of the un-modified soft limit. Modification of the soft limit is constrained by a non-adjustable limit. The operating point of the engine is adjusted to increase engine torque above the boundary of the un-modified soft limit. The method may mitigate a vehicle speed lug event and/or avoid a transmission shift event.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 11, 2016
    Inventors: John Carson Wall, Vivek Anand Sujan
  • System, method, and apparatus for determining aftertreatment fluid quality
    Patent number: 8863504
    Abstract: A method includes determining a first NOx conversion efficiency (?) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes determining a second NOx conversion ? value and comparing the first NOx conversion ? value and the second NOx conversion ? value, determining a NOx conversion ? change in response to comparing, and determining a DEF quality indicator in response to the NOx conversion ? change.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: October 21, 2014
    Assignee: Cummins Inc.
    Inventors: Mark Bays, Thomas A. Grana, Daniel D. Wilheim, Stephen J. Charlton, John Carson Wall
  • SYSTEM, METHOD, AND APPARATUS FOR DETERMINING AFTERTREATMENT FLUID QUALITY
    Publication number: 20110209461
    Abstract: A method includes determining a first NOx conversion efficiency (?) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes determining a second NOx conversion ? value and comparing the first NOx conversion ? value and the second NOx conversion ? value, determining a NOx conversion ? change in response to comparing, and determining a DEF quality indicator in response to the NOx conversion ? change.
    Type: Application
    Filed: September 30, 2010
    Publication date: September 1, 2011
    Inventors: Mark Bays, Thomas A. Grana, Daniel D. Wilheim, Stephen J. Charlton, John Carson Wall