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:
Aug. 16, 2005
Filed:
Nov. 21, 2002
Paul Joseph Tennison, Oak Park, MI (US);
Paul M. Laing, Canton, MI (US);
Christine Kay Lambert, Westland, MI (US);
Robert Henry Hammerle, Franklin, MI (US);
William Charles Ruona, Farmington Hills, MI (US);
Paul Joseph Tennison, Oak Park, MI (US);
Paul M. Laing, Canton, MI (US);
Christine Kay Lambert, Westland, MI (US);
Robert Henry Hammerle, Franklin, MI (US);
William Charles Ruona, Farmington Hills, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system for effective NOx and particulate matter control in a diesel or other lean burn internal combustion engine is presented. The system includes a urea-based SCR catalyst having an oxidation catalyst coupled upstream of it and a particulate filter coupled downstream of the SCR catalyst. This system configuration results in improved NOx conversion due to fast SCR catalyst warm-up and higher operating temperatures. Additionally, placing the particulate filter last in this system configuration reduces tailpipe ammonia emissions as well as prevents any thermal damage to the SCR catalyst due to the particulate filter regeneration.