METHOD AND DEVICE FOR DIAGNOSING THE MEASURING ABILITY OF AN EXHAUST GAS PROBE

METHOD AND DEVICE FOR DIAGNOSING THE MEASURING ABILITY OF AN EXHAUST GAS PROBE

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 chan...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: REINHARDT, Goetz, BUCHHOLZ, Martin
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung: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.