Method for controlling an exhaust gas component filling level in an accumulator of a catalytic converter

US10859017B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Matthias Eckart · Bietigheim-Bissingen, DE
• Alexandre Wagner · Stuttgart, DE
• Jens Oehlerking · Stuttgart, DE
• Joerg Frauhammer · Gemmrigheim, DE
• Martin Knopp · Lambach, DE
• Michael Fey · Wiernsheim, DE

Key dates

• Filing date: Oct 26, 2017
• Grant date: Dec 8, 2020
• Expiry date: Oct 26, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/0816
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for controlling a filling level of an exhaust gas component accumulator of a catalytic converter in the exhaust gas of an internal combustion engine where an actual filling level of the accumulator is determined with a first catalytic converter model. The method includes forming a lambda setpoint is formed, wherein a predetermined target fill level is converted into a base lambda setpoint via a second system model reverse of the first catalytic converter model, a deviation of the actual fill level from the predetermined target fill level is determined and processed to a lambda setpoint correction value via a fill level control unit, a sum of the base lambda setpoint value and the lambda setpoint value correction value is formed, and said sum is used to form a correction value, with which fuel metering to at least one combustion chamber of the internal combustion engine is influenced.