Method for operating an exhaust gas sensor

US12203826B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Michael Bessen · Stuttgart, DE
• Dorothea Welke · Stuttgart, DE
• Felix Guenther · Bubesheim, DE
• Maik Thiele · Stuttgart, DE
• Manuel Marks · Lohr am Main, DE
• Mathias Klenk · Petershöfe, DE

Key dates

• Filing date: Jul 10, 2020
• Grant date: Jan 21, 2025
• Expiry date: Jul 11, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/1472
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating an exhaust gas sensor in an exhaust system of an internal combustion engine of a vehicle. The exhaust gas sensor includes a ceramic sensor element having at least one measuring electrode and a heating device. A binary dewpoint end signal is calculated, based on data which relate to the internal combustion engine and the exhaust gas sensor, which indicates whether or not the occurrence of liquid water in the exhaust system is still to be expected. Whenever the vehicle is turned off and the dewpoint end signal simultaneously has the value which signals that the occurrence of liquid water in the exhaust system is still to be expected, the sensor element is heated by its heating device to a temperature for a certain period of time in such a way that the sensor element dries.