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:
Apr. 10, 2012
Filed:
Mar. 06, 2009
Klaus Schrewe, Rüthen, DE;
Rüdiger Mandt, Breckerfeld, DE;
Klaus Schrewe, Rüthen, DE;
Rüdiger Mandt, Breckerfeld, DE;
HJS Emission Technology GmbH & Co. KG, Menden, DE;
Abstract
A method for determining the charge state of a particle filter installed in the exhaust gas line of an internal combustion engine comprises the following steps: determining the exhaust gas volumetric flow in the flow direction of the exhaust gas downstream of the particle filter (), detecting the pressure present in the exhaust gas line () in the direction of flow of the exhaust gas prior to the particle filter (), comparing the exhaust gas volumetric flow determined hinter the particle filter () with the detected pressure present upstream of the particle filter () and evaluating the results of the comparison with consideration to the exhaust gas back pressure of the uncharged particle filter () and the exhaust gas back pressure caused by the particle filter charge, said pressure being higher than the uncharged filter. Further described is a corresponding device for reducing the particle emissions of an internal combustion engine.