Exhaust gas aftertreatment system and method for exhaust gas aftertreatment in an internal combustion engine

US11143075B2 · kind B2 · utility

Assignee

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Johannes BUNKUS · Barneberg, DE
• Stephan Kellner · Lauchheim, DE

Key dates

• Filing date: Nov 27, 2019
• Grant date: Oct 12, 2021
• Expiry date: Nov 27, 2039

Classification

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

Abstract

An exhaust gas aftertreatment system for an internal combustion engine comprises an exhaust gas system with an exhaust gas channel in which at least two exhaust gas aftertreatment components for the selective, catalytic reduction of nitrogen oxides are arranged. Downstream from the first exhaust gas aftertreatment component and upstream from the second exhaust gas aftertreatment component is a burner with which the exhaust gas can be heated up before it enters the second exhaust gas aftertreatment component. Downstream from the second exhaust gas aftertreatment component is an oxidation catalytic converter that converts unburned hydrocarbons. In a method for exhaust gas aftertreatment in an internal combustion engine having such an exhaust gas aftertreatment system, the exhaust gas from the internal combustion engine is heated up by the burner in order to heat up the second exhaust gas aftertreatment component for the selective, catalytic reduction of nitrogen oxides.