Method, processing unit, and computer program for operating an exhaust gas system

US11808226B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexander Baumann · Birkenfeld, DE
• Frank Meier · Goldkronach, DE
• Jan Kappa · Ludwigsburg, DE

Key dates

• Filing date: Oct 5, 2022
• Grant date: Nov 7, 2023
• Expiry date: Oct 5, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method (200) for operating an exhaust gas system (120) that includes a first catalytic converter (122) and at least one second catalytic converter (124), which are both arranged downstream from an internal combustion engine (110) The internal combustion engine (110) is controlled to generate a rich exhaust gas having a first rich gas portion, (220) a fill level of the second catalytic converter (124) is ascertained with respect to at least one lean gas component that is storable in the second catalytic converter and, if the ascertained fill level drops below (230) a minimum fill level, (240) the internal combustion engine (110) is controlled to generate a lean exhaust gas. The internal combustion engine (110) is then controlled to generate a rich exhaust gas having a second rich gas portion, and subsequently controlled (210) to generate the rich exhaust gas having the first rich gas portion.