Method for determining the oxygen load of a catalytic converter of an internal combustion engine, and exhaust system of an internal combustion engine

US11578636B2 · kind B2 · utility

Assignee

• VITESCO TECHNOLOGIES GMBH · DE

Inventors

• Paul Rodatz · Landshut, DE
• Gerhard Haft · Munich, DE
• Hong Zhang · Schwieberdingen, DE

Key dates

• Filing date: Apr 16, 2020
• Grant date: Feb 14, 2023
• Expiry date: Apr 16, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Various embodiments include a method of ascertaining the oxygen load of a catalytic converter disposed in an exhaust tract of an internal combustion engine with an exhaust gas sensor is disposed downstream of the catalytic converter comprising: generating a signal using the exhaust gas sensor indicating a proportion of nitrogen oxide and/or ammonia in the exhaust gas; and ascertaining the oxygen load of the catalytic converter at least partly on the basis of the signal from the exhaust gas sensor.