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:
Sep. 16, 2003
Filed:
Dec. 21, 2001
Thomas Birkhofer, Immenstaad, DE;
Aleksandar Knezevic, Kirchheim/Teck, DE;
Holger Leye, Unterensingen, DE;
Ralf Moos, Friedrichshafen, DE;
Carsten Plog, Markdorf, DE;
Thomas Ried, Uhingen, DE;
Dirk Voigtlaender, Korntal-Muenchingen, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In a method for identifying the state of an NOx storage catalyst which is cyclically loaded with NOx in the exhaust stream of an internal combustion engine and regenerated, two electrical defining quantities, independent of each other, of the electrically complex impedance of the NOx storage catalyst are detected, one of the two electrical quantities being a measure of the degree of loading of the NOx storage catalyst, and from the second electrical quantity the point in time being identifiable for the end of the regeneration process of the NOx storage catalyst.