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:
Feb. 28, 2012
Filed:
Dec. 01, 2008
Mark Schmale, Blue Bell, PA (US);
Gregory A. Griffin, Glendale Heights, IL (US);
Mark Schmale, Blue Bell, PA (US);
Gregory A. Griffin, Glendale Heights, IL (US);
International Engine Intellectual Property Company, LLC, Warrenville, IL (US);
Abstract
Dosing components () in an engine exhaust after-treatment system () that includes an SCR catalyst () are thermally managed by flowing engine coolant through a coolant passage in a urea injector () that injects aqueous urea into the after-treatment system, controlling a three-way valve () to selectively direct coolant flow leaving the urea injector to a first branch that is in heat exchange relationship with a tank () that holds a supply of aqueous urea and a supply pump module () that pumps aqueous urea from the tank to the urea injector, and a second branch that is not in heat exchange relationship with either the tank or the supply pump, and returning coolant from the branches to the engine cooling system.