The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 2013
Filed:
Dec. 04, 2009
Stephen Thomas, Laingsburg, MI (US);
James Reynolds, East Lansing, MI (US);
Sean Keidel, Jackson, MI (US);
Michael Shovels, Jackson, MI (US);
Stephen Thomas, Laingsburg, MI (US);
James Reynolds, East Lansing, MI (US);
Sean Keidel, Jackson, MI (US);
Michael Shovels, Jackson, MI (US);
Tenneco Automotive Operating Company Inc., Lake Forest, IL (US);
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.