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:
Aug. 19, 2014
Filed:
Sep. 09, 2008
Cyrill Kammer, Bad Urach, DE;
Berthold Keppeler, Owen, DE;
Jochen Lahr, Stuttgart, DE;
Markus Paule, Korb, DE;
Anke Traebert, Stuttgart, DE;
Nicole Werquet, Stuttgart, DE;
Axel Zuschlag, Kernen, DE;
Cyrill Kammer, Bad Urach, DE;
Berthold Keppeler, Owen, DE;
Jochen Lahr, Stuttgart, DE;
Markus Paule, Korb, DE;
Anke Traebert, Stuttgart, DE;
Nicole Werquet, Stuttgart, DE;
Axel Zuschlag, Kernen, DE;
Daimler AG, Stuttgart, DE;
Abstract
In a method for reducing the emission of nitrogen dioxide in a motor vehicle having an exhaust gas purification system having an SCR catalytic converter with adsorption centers for nitrogen oxides, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter above an operating temperature. Below the operating temperature, the exhaust gas supplied to the SCR catalytic converter is enriched with a material such that an adsorption of nitrogen oxides is inhibited at corresponding adsorption centers of the SCR catalytic converter. In order to reduce the overall NOemissions below a first, predeterminable amount, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter and the NOportion of the total NOemissions is reduced below a second, predeterminable amount in that NOis converted with hydrocarbons stored in the SCR catalytic converter.