Patent · US Active

Device and method for diagnosing an exhaust gas sensor

US9109527B2 · kind B2 · utility

13Cited by

6References

14Claims

0Family size

Assignee

CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

Stefan Barnikow · Bad Abbach, DE
Frank Friedhof · Regensburg, DE
Ekkehart-Peter Wagner · Bad Abbach, DE

Key dates

Filing date	Oct 14, 2010
Grant date	Aug 18, 2015
Priority date	—
Expiry date	May 26, 2032

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/2093
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device for diagnosing an exhaust gas sensor, in particular a linear oxygen probe, for an internal combustion engine. A diagnostic unit is configured to control a first and a second current source in a coordinated manner in order to generate a first and a second current. Each of the currents has a predefined polarity sign, and is designed to determine the first and/or second and/or third voltages applied at a first and/or second and/or third terminal when first and second currents flow and put the amounts of the voltages in relation to the coordinated currents such that line interruptions and/or short circuits can be detected at the first and/or second and/or third terminal.

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