Method for operating an exhaust aftertreatment system having an SCR catalyst

US10590822B2 · kind B2 · utility

Assignee

• MTU FRIEDRICHSHAFEN GMBH · DE

Inventors

• Jens Niemeyer · Friedrichshafen, DE
• Tim Späder · Tettnang, DE

Key dates

• Filing date: Jun 28, 2016
• Grant date: Mar 17, 2020
• Expiry date: Jun 28, 2036

Classification

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

Abstract

A method for operating a system having an internal combustion engine and an exhaust aftertreatment system having an SCR catalyst, wherein the internal combustion engine is controlled on the basis of at least one process parameter that influences a nitrogen oxide raw emission, wherein aging detection is performed for the SCR catalyst, wherein in a first operating mode of the internal combustion engine, if aging of the SCR catalyst is detected, the at least one process parameter is changed in the direction of a reduced nitrogen oxide raw emission, wherein the internal combustion engine is controlled on the basis of the changed at least one process parameter.