Method for operating a nitrogen oxide sensor

US12405257B2 · kind B2 · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Herbert Schankula · Eßlingen, DE
• Nhat Phan · Canton, US
• Rainer Hegemann · Ludwigsburg, DE
• Matthias Hoelz · Ludwigsburg, DE
• Yvonne BINDER · Hemmingen, DE

Key dates

• Filing date: Jul 4, 2022
• Grant date: Sep 2, 2025
• Expiry date: Jul 4, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/0068
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating a nitrogen oxide sensor of an internal combustion engine. When, for a number greater than 1 of operating cycles each including exactly two directly consecutive periods of time, where during a respective first of the periods of time the engine is in fired operation and during the respective second period of time a fired operation of the engine ceases, it is determined that an arithmetic mean of the first periods of time is less than a first threshold value and an arithmetic mean of the second periods of time is less than a second threshold value, a special overrun operating state of a computer is set, where after deactivation of the engine, the computer is kept activated in the special overrun operating state for a longer overrun period, where the nitrogen oxide sensor is kept in a state of operating readiness during the overrun period.