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:
Feb. 16, 2010
Filed:
Jan. 07, 2008
Frank Duvinags, Kirchheim/Teck, DE;
Stefan Kurze, Markgröningen, DE;
Thomas Liebscher, Fellbach, DE;
Arno Nolte, Stuttgart, DE;
Markus Paule, Remshalden, DE;
Norbert Ruzicka, Steinenbronn, DE;
Joachim Schommers, Allmersbach i.T., DE;
Frank Duvinags, Kirchheim/Teck, DE;
Stefan Kurze, Markgröningen, DE;
Thomas Liebscher, Fellbach, DE;
Arno Nolte, Stuttgart, DE;
Markus Paule, Remshalden, DE;
Norbert Ruzicka, Steinenbronn, DE;
Joachim Schommers, Allmersbach i.T., DE;
Daimler AG, Stuttgart, DE;
Abstract
In a method for operating an exhaust-gas cleaning unit of a diesel engine including a particle filter and a nitrogen oxide storage device arranged upstream of the particle filter, wherein sulfur regeneration of the nitrogen oxide storage device is performed periodically at raised exhaust gas temperatures and, in certain phases, with a rich exhaust gas composition, and also soot regeneration of the particle filter is performed at raised exhaust gas temperatures with a lean exhaust gas composition, at least some of the sulfur regeneration and the soot regeneration phases are performed in a combined soot and sulfur regeneration phase, and for the sulfur regeneration, at least temporarily, a rich exhaust-gas composition with a temperature higher than the temperature of the lean exhaust gas composition is provided for the soot regeneration of the particle filter.