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:
Apr. 01, 2003
Filed:
Jun. 19, 2001
David George Farmer, Plymouth, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
An exhaust gas treatment system for an internal combustion engine includes a three-way catalyst and a NO device located downstream of the three-way catalyst. The device is preconditioned for emissions reduction at engine operating conditions about stoichiometry by substantially filling the device with oxygen and NO ; and purging stored oxygen and stored NO from only an upstream portion of the device, whereupon the upstream portion of the device operates to store oxygen and NO during subsequent lean transients while the downstream portion of the device operates to reduce excess HC and CO during subsequent rich transients.