Method for determining the aging of an oxidation catalyst in an exhaust gas aftertreatment system of an internal combustion engine, method for detecting ash in a particle filter of an exhaust gas aftertreatment system, control device, and internal combustion engine

US10287959B2 · kind B2 · utility

Assignee

• MTU FRIEDRICHSHAFEN GMBH · DE

Inventors

• Boban Maletic · Friedrichshafen, DE
• Gerald Fast · Markdorf, DE
• Jens Niemeyer · Friedrichshafen, DE
• Tim Späder · Tettnang, DE
• Ralf Müller · Geringswalde, DE

Key dates

• Filing date: Sep 11, 2014
• Grant date: May 14, 2019
• Expiry date: Mar 7, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for determining the aging of an oxidation catalyst in an exhaust gas aftertreatment system of an internal combustion engine, having the following steps: ascertaining a soot burn rate of a particle filter of the exhaust gas aftertreatment system; adapting a function having at least one adaptation parameter to the soot burn rate dependent on at least one variable, a value of the adaptation parameter depending on an aging of the oxidation catalyst; and determining the aging of the oxidation catalyst using the adaptation parameter value ascertained by adapting the function.