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. 28, 2011
Filed:
Aug. 29, 2007
Lifeng Xu, Farmington Hills, MI (US);
William Lewis Henderson Watkins, Toledo, OH (US);
William Charles Ruona, Farmington Hills, MI (US);
George Wade Graham, Ann Arbor, MI (US);
Robert Walter Mccabe, Novi, MI (US);
Lifeng Xu, Farmington Hills, MI (US);
William Lewis Henderson Watkins, Toledo, OH (US);
William Charles Ruona, Farmington Hills, MI (US);
George Wade Graham, Ann Arbor, MI (US);
Robert Walter McCabe, Novi, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method of regenerating a particulate filter utilizes two temperature levels, with the first, lower, level removing stored hydrocarbons and urea from an SCR catalyst. The second, higher, level then follows for filter regeneration. Because the regeneration occurs after the SCR catalyst has been purged of hydrocarbons and urea, for example, the temperature experienced by the SCR catalyst during regeneration is reduced. In this way, SCR degradation may be reduced.