Method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine and a device for implementing the method

US7546728B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Ripper · Stuttgart, DE
• Stefan Wickert · Albershausen, DE
• Johannes Schaller · Lambach, DE
• Hartmut Lueders · Oberstenfeld, DE
• Christian Walz · Durmersheim, DE
• Thorsten Mayer · Worms, DE
• Ralf Schernewski · Stuttgart, DE
• Matthias Loehr · Steinheim, DE
• Ulf-Peter Schmeling · Rutesheim, DE

Key dates

• Filing date: Jun 29, 2005
• Grant date: Jun 16, 2009
• Expiry date: Jun 29, 2025

Classification

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

Abstract

A method for operating a catalytic converter used for purifying the exhaust gas of an internal combustion engine, and a device for implementing the method, which provide for an open-loop or closed-loop control of the reagent fill level in the catalytic converter to a predefined storage setpoint value. The targeted stipulation of the storage setpoint value ensures, on one hand, that in non-stationary states of the internal combustion engine, there is a sufficient quantity of reagent available for the completest possible removal of at least one unwanted exhaust-gas component, and on the other hand, a reagent slip is avoided.