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:
Dec. 25, 2007
Filed:
May. 18, 2004
Jürgen Gieshoff, Biebergemünd, DE;
Martin Votsmeir, Maintal, DE;
Stephan Malmberg, Rodenbach, DE;
Egbert Lox, Hochwaldhausen, DE;
Thomas Kreuzer, Karben, DE;
Jürgen Gieshoff, Biebergemünd, DE;
Martin Votsmeir, Maintal, DE;
Stephan Malmberg, Rodenbach, DE;
Egbert Lox, Hochwaldhausen, DE;
Thomas Kreuzer, Karben, DE;
Umicore AG & Co. KG, Hanua-Wolfgang, DE;
Abstract
The invention relates to a method and an apparatus of operating a drive system comprising an engine and an exhaust gas purification unit containing a catalyst, where the engine emits an exhaust gas having an exhaust gas temperature and the catalyst has a catalytic activity for the purification of the exhaust gas. In the method, an aging-induced decrease in the catalytic activity of the catalyst is compensated at least part of the time by increasing the exhaust gas temperature of the engine.