Method for determining the temperature of an electrically heatable catalytic converter

US10731533B2 · kind B2 · utility

Assignee

• VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

• Hardy Naumann · Wolfsburg, DE
• Stefan Paukner · Wolfsburg, DE

Key dates

• Filing date: Mar 29, 2019
• Grant date: Aug 4, 2020
• Expiry date: Mar 29, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A method for determining the temperature of an electrically heatable catalytic converter having an electric heating element that includes a heating resistor, the electrical resistance of which changes as a function of the component temperature of the electrically heatable catalytic converter. This resistance is determined from the current intensity and the voltage at the electrically heatable catalytic converter, and is used to determine the component temperature of the catalytic converter, based on a characteristic curve stored in the control unit. The energization of the heating resistor for determining the component temperature takes place in each case for only a short time in order to minimize the energy input into the heating resistor and thus avoid overheating of the heating resistor. In addition, by use of the short time interval, the aim is to minimize the energy requirements for determining the component temperature of the electrically heatable catalytic converter.