Patents by Inventor Michael Shovels

Michael Shovels 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).

  • NOx elimination injector firing control circuit
    Patent number: 8468810
    Abstract: An NOx injection system for treating a vehicle exhaust system comprises an injector for injecting a select material into the vehicle exhaust system and including an electrical coil. An impedance element is connected in series with a flyback diode across the coil. An injector firing control circuit is electrically connected to the injector for driving the coil, the switching circuit operating in an on mode to fire the injector and in an off mode to turn off the injector. The impedance element increases reverse voltage to increase injector turn off response.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: June 25, 2013
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: Stephen Thomas, James Reynolds, Sean Keidel, Michael Shovels
  • NOx ELIMINATION INJECTOR FIRING CONTROL CIRCUIT
    Publication number: 20110131960
    Abstract: An NOx injection system for treating a vehicle exhaust system comprises an injector for injecting a select material into the vehicle exhaust system and including an electrical coil. An impedance element is connected in series with a flyback diode across the coil. An injector firing control circuit is electrically connected to the injector for driving the coil, the switching circuit operating in an on mode to fire the injector and in an off mode to turn off the injector. The impedance element increases reverse voltage to increase injector turn off response.
    Type: Application
    Filed: December 4, 2009
    Publication date: June 9, 2011
    Inventors: Stephen Thomas, James Reynolds, Sean Keidel, Michael Shovels