Oxygen concentration detection device
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United States of America Patent
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-
May 13, 1997
Grant Date -
N/A
app pub date -
Oct 30, 1995
filing date -
Oct 31, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Erroneous malfunction determination of an oxygen sensor is avoided by consideration of combustible substance penetrating to an air electrode side of the oxygen sensor. The combustible substance is determined whether it has penetrated to the air electrode of the oxygen sensor. If it is determined so, then it is determined whether the oxygen deficiency has disappeared, and the sensor malfunction determination operation is disabled until the oxygen deficiency at the air electrode is eliminated. At the same time, malfunction determination is also disabled.
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