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. 30, 2014
Filed:
Sep. 06, 2012
Achim Dittler, Stuttgart, DE;
Uwe Gaertner, Remshalden, DE;
Thomas Koch, Boeblingen, DE;
Alexander Massner, Esslingen, DE;
Kevin Sisken, Saline, MI (US);
Frank Zimmermann, Stuttgart, DE;
Achim Dittler, Stuttgart, DE;
Uwe Gaertner, Remshalden, DE;
Thomas Koch, Boeblingen, DE;
Alexander Massner, Esslingen, DE;
Kevin Sisken, Saline, MI (US);
Frank Zimmermann, Stuttgart, DE;
Daimler AG, Stuttgart, DE;
Abstract
A method for operating a motor vehicle internal combustion engine with an exhaust system branch in which a wall-flow exhaust particle filter is arranged. An amount of ash and an amount of soot accumulated in the exhaust particle filter are continuously determined. An ash increase value characterizing an increase in the amount of ash is determined and if pre-set conditions are present, the operation of the internal combustion engine is changed over to a special operating mode for performing an ash detachment and transportation operation, in which operating variables of the internal combustion engine are set such that, on the exhaust entry side in the exhaust particle filter, a pre-settable minimum exhaust flow speed results at which detachment of ash attached to the channel walls of the exhaust particle filter and transportation of detached ash in the direction of the respective inlet channel end is made possible.