Deterioration detector system for catalyst in use for emission gas purifier
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United States of America Patent
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Nov 28, 1989
Grant Date -
N/A
app pub date -
Nov 17, 1987
filing date -
Nov 20, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Deterioration detector system for catalyst in use for emission gas purifier, comprising; an emission passageway through which exhaust gas from internal combustion engine, passes by way of catalyst to facilitate the reducing and oxidizing reaction among the toxicant component of hydrocarbon, carbon monoxide and nitrogen oxide; a sensor placed at the emission passageway to position downstream of the catalyst against the exhaust gas flow so as to generate an output in direct proportion to air-fuel ratio in the exhaust gas; an annunciator arranged to activate in response to the output of more than the predetermined level generated from the air- fuel ratio sensor.
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