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:
Jul. 05, 2005
Filed:
Jun. 19, 2001
David Karl Bidner, Livonia, MI (US);
Grant Alan Ingram, West Lafayette, IN (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
David Karl Bidner, Livonia, MI (US);
Grant Alan Ingram, West Lafayette, IN (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A more precise method for determining the oxygen storage capacity of an exhaust gas aftertreatment device is presented. The most accurate capacity estimate is obtained while the engine is idling or during low load operation. The capacity is determined by integrating the output of an oxygen sensor located downstream of the device during a period of time that it takes to store more than a predetermined amount of oxygen in the device. The overall LNT efficiency can then be inferred from its oxygen storage capacity. This method allows for improved emission control and fuel economy.