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. 21, 2010
Filed:
Jul. 29, 2004
Marcus Pfeifer, Solingen, DE;
Nicola Soeger, Nidderau, DE;
Yvonne Demel, Frankfurt am Main, DE;
Tobias Kuhl, Hanau, DE;
Paul Christian Spurk, Weiterstadt, DE;
Jürgen Gieshoff, Gelnhausen, DE;
Egbert Lox, Grebenhain, DE;
Thomas Kreuzer, Karben, DE;
Marcus Pfeifer, Solingen, DE;
Nicola Soeger, Nidderau, DE;
Yvonne Demel, Frankfurt am Main, DE;
Tobias Kuhl, Hanau, DE;
Paul Christian Spurk, Weiterstadt, DE;
Jürgen Gieshoff, Gelnhausen, DE;
Egbert Lox, Grebenhain, DE;
Thomas Kreuzer, Karben, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
The invention relates to a catalyst arrangement for purifying the exhaust gases of internal combustion engines operated under lean conditions. It is proposed that a thinwalled, porous carrier be coated on one side with a nitrogen oxide storage catalyst and on the other side with an SCR catalyst. When the exhaust gas is passed through the catalytic coatings and the support material, a significant improvement in the nitrogen oxide conversion is achieved compared to a series arrangement of the catalysts on separate carriers. Wall flow filters have been found to be useful as thin-walled carriers.