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. 03, 2013
Filed:
Feb. 21, 2008
Anders Tuomivaara, Göteborg, SE;
Jonas Jansson, Göteborg, SE;
Lucas Megas, Göteborg, SE;
Lennart Andersson, Varberg, SE;
Jonas Edvardsson, Möindal, SE;
Carl-johan Karlsson, Göteborg, SE;
Anders Tuomivaara, Göteborg, SE;
Jonas Jansson, Göteborg, SE;
Lucas Megas, Göteborg, SE;
Lennart Andersson, Varberg, SE;
Jonas Edvardsson, Möindal, SE;
Carl-Johan Karlsson, Göteborg, SE;
Volvo Lastvagnar AB, Göteborg, SE;
Abstract
A system and an on-board-diagnosis method is provided for an exhaust aftertreatment system of an engine including a diesel particulate filter unit which encompasses a particulate filter in which soot can be oxidized by NO2 and constituents of the exhaust gas are deoxidized in a nitrogen-oxides reduction unit arranged downstream of the diesel particulate filter unit, wherein the exhaust gas flows from the diesel particulate filter unit to the nitrogen-oxides reduction unit. The on-board-diagnosis method includes estimating an NO2 content upstream of the nitrogen-oxides reduction unit, measuring at least one of an NOx or NO2 content upstream of the nitrogen-oxides reduction unit, performing a comparison between the estimated and the measured contents, and, based on the result of the comparison deciding on at least one conditioning step of the diesel particulate filter unit.