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. 21, 2006
Filed:
Nov. 29, 2004
Michiel J. Van Nieuwstadt, Ann Arbor, MI (US);
Devesh Upadhyay, Dearborn, MI (US);
Michael Goebelbecker, Dearborn Heights, MI (US);
William Charles Ruona, Farmingtion Hills, MI (US);
Michiel J. van Nieuwstadt, Ann Arbor, MI (US);
Devesh Upadhyay, Dearborn, MI (US);
Michael Goebelbecker, Dearborn Heights, MI (US);
William Charles Ruona, Farmingtion Hills, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method and a system for improved reductant delivery to an exhaust gas aftertreatment device for a lean burn internal combustion engine exhaust are presented. The system includes a heated evaporator unit into which a mixture of reductant and air in injected, wherein the mixture is vaporized and introduced into the exhaust gas aftertreatment device. Introducing the reductant mixed with air into the heated evaporator unit prevents lacquering and soot deposits on the heated element housed inside the unit, and also speeds up the vaporization process due to better reductant distribution thus reducing system response delays and improving conversion efficiency of the exhaust gas aftertreatment device. The reductant delivery system is further improved by adding a catalyst to it, and by preventing the reductant and air mixture from coming into direct contact with the surface of the heating element.