Method and device for exhaust gas aftertreatment in an internal combustion engine

US11668217B2 · kind B2 · utility

Assignees

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE
• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Falk-Christian Baron Von Ceumern-Lindenstjerna · Braunschweig, DE
• Stefan Paukner · Wolfsburg, DE
• Michael Kaack · Bochum, DE
• Sebastian Hemminger · Oberriexingen, DE

Key dates

• Filing date: May 26, 2022
• Grant date: Jun 6, 2023
• Expiry date: May 26, 2042

Classification

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

Abstract

A device for exhaust gas aftertreatment in an internal combustion engine can be connected to an outlet of the internal combustion engine. The device comprises an exhaust gas system with an exhaust gas channel in which a three-way catalytic converter is arranged, and an exhaust gas burner with which hot burner exhaust gases can be fed into the exhaust gas channel at a feed point upstream from the three-way catalytic converter. The three-way catalytic converter is configured as a lambda probe catalytic converter and comprises a first catalyst volume and a second catalyst volume, whereby a lambda probe is arranged downstream from the first catalyst volume and upstream from the second catalyst volume, whereby the first catalyst volume has a lower oxygen storage capacity than the second catalyst volume. A method for exhaust gas aftertreatment in an internal combustion engine has such an exhaust gas aftertreatment device.