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:
Nov. 21, 2006
Filed:
Aug. 12, 2004
John LI, Canton, MI (US);
William Watkins, Toledo, OH (US);
Christian Goralski, Jr., St. Paul, MN (US);
John Li, Canton, MI (US);
William Watkins, Toledo, OH (US);
Christian Goralski, Jr., St. Paul, MN (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
The present invention provides a method of removing harmful gases from an automobile exhaust. The method of the invention comprises contacting a thermally stable NOtrap composition with a first exhaust gas mixture at a temperature of at least 200° C. The first exhaust gas mixture includes exhaust gases from an internal combustion engine operating in a fuel-lean condition. After, NOhas been absorbed onto the NOabsorber material, the NOtrap composition is then contacted with a second exhaust gas composition. In this step, the second exhaust gas mixture includes exhaust gases from an internal combustion engine operating in a fuel-rich condition. The present invention also provides the NOtrap composition used in the method. The NOtrap of the invention includes a precious metal, a NOabsorber material, an oxide that inhibits the decrease in NOstoring ability of the NOtrap composition, and a support material.