Method and control unit for regulating a fill level of a storage of a catalytic converter for an exhaust gas component

US11111873B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexandre Wagner · Stuttgart, DE
• Michael Fey · Wiernsheim, DE

Key dates

• Filing date: Jun 3, 2019
• Grant date: Sep 7, 2021
• Expiry date: Dec 5, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A filling of an exhaust gas component storage of a catalytic converter is regulated. An actual fill level of the exhaust gas component storage is ascertained using a first system model, and a base lambda setpoint value for a first control loop is predefined by a second control loop. An initial value for the base lambda setpoint value is converted into a fictitious fill level, the fictitious fill level being compared with a setpoint value for the fill level output, and the base lambda setpoint value being iteratively changed as a function of the comparison result, if a difference between the setpoint value for the fill level and the fictitious fill level is greater than a predefined degree. The base lambda setpoint value is not changed if no difference exists between the setpoint value for the fill level and the fictitious fill level.