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:
Jun. 25, 2013
Filed:
Feb. 21, 2008
Lennart Andersson, Varberg, SE;
Jonas Edvardsson, Mölndal, SE;
Jonas Jansson, Göteborg, SE;
Carl-johan Karlsson, Göteborg, SE;
Lucas Megas, Göteborg, SE;
Anders Tuomivaara, Göteborg, SE;
Lennart Andersson, Varberg, SE;
Jonas Edvardsson, Mölndal, SE;
Jonas Jansson, Göteborg, SE;
Carl-Johan Karlsson, Göteborg, SE;
Lucas Megas, Göteborg, SE;
Anders Tuomivaara, Göteborg, SE;
Volvo Lastvagnar AB, Göteborg, SE;
Abstract
A system and a method are provided for operating an exhaust aftertreatment system of an engine in which one or more constituents of the exhaust gas are oxidized in an oxidation catalyst and one or more constituents of the exhaust gas are deoxidized by means of a group of possible chemical reactions of different type between the one or more constituents of the exhaust gas and catalytic material arranged in a selective-catalytic-reduction catalyst, wherein the exhaust gas flows from the oxidation catalyst to the selective-catalytic-reduction catalyst, wherein the steps are performed: (a) adjusting at least one desired ratio among one or more pairs of the one or more constituents by varying a space velocity of the exhaust gas in at least the oxidation catalyst; (b) varying the space velocity of the exhaust gas by varying one or more operation parameters of the engine; and (c) establishing the ratio to a value at least approaching the desired ratio among the one or more pairs of the one or more constituents at the inlet of the selective-catalytic-reduction catalyst.