Apparatus and method for judging deterioration of catalysts device and oxygen content sensing device
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United States of America Patent
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Jul 27, 1999
Grant Date -
N/A
app pub date -
Mar 4, 1996
filing date -
Mar 16, 1995
priority date (Note) -
Expired
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Abstract
An apparatus and a method for judging the deterioration state of a catalyst device and an oxygen content sensing device are disclosed, in which virtual signals are generated to accurately determine the deterioration state of the catalyst device and the oxygen content sensing device by utilizing theoretical oxygen content sensing signals which are calculated in accordance with the operation state of automobiles.
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