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:
May. 22, 2012
Filed:
Feb. 25, 2004
Frank Duvinage, Kirchheim, DE;
Berthold Keppeler, Owen, DE;
Bernd Krutzsch, Denkendorf, DE;
Markus Paule, Korb, DE;
Michel Weibel, Stuttgart, DE;
Frank Duvinage, Kirchheim, DE;
Berthold Keppeler, Owen, DE;
Bernd Krutzsch, Denkendorf, DE;
Markus Paule, Korb, DE;
Michel Weibel, Stuttgart, DE;
Daimler AG, Stuttgart, DE;
Abstract
The exhaust gas aftertreatment device according to the invention having a reforming unit for generating hydrogen by steam reforming, partial oxidation of hydrocarbons and/or mixed forms thereof is distinguished by the fact that the reforming unit is arranged directly in the main exhaust gas stream from an internal combustion engine. The steam and residual oxygen which are required for the reforming preferably originate from the exhaust gas. The step of providing the required reducing agents consists in briefly switching the internal combustion engine, which is predominantly operated in lean-burn mode and the exhaust gas from which is undergoing the aftertreatment, to rich-burn mode, allowing reforming by means of the reforming reactor according to the invention using the hydrocarbons that are present in the exhaust gas.