Patent · US Active

Method and device for diagnosing the measuring ability of an exhaust gas sensor

US10094803B2 · kind B2 · utility

11Cited by

1References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Goetz Reinhardt · Eppelheim, DE
Martin Buchholz · Bietigheim-Bissingen, DE

Key dates

Filing date	Dec 3, 2014
Grant date	Oct 9, 2018
Priority date	—
Expiry date	Mar 3, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4073
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and device for diagnosing a measuring ability of an exhaust gas sensor in an exhaust gas channel of an internal combustion engine. A sensor design including a storage volume in a reference gas channel, at least one first electrode facing an electrode cavity connected to the exhaust gas channel, and a second electrode facing the reference gas channel is used as the exhaust gas sensor. Such a high voltage is applied between the first electrode and the second electrode during a first phase that the reference gas channel is filled with additional oxygen as a result of decomposition of water and/or carbon dioxide, and a pump current from the first electrode to the second electrode is used to evaluate the measuring ability during a second phase.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.