Fuelling apparatus
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United States of America Patent
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-
Dec 22, 1992
Grant Date -
N/A
app pub date -
Sep 13, 1990
filing date -
Sep 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to an apparatus: to determine the concentration of vehicular fuel vapor contained in a fuel tank of a vehicle; to examine the difference between the measured fuel vapor concentration and an internal reference standard based on the concentration of ambient vapors; to issue a warning to report an abnormality in the system if an unusual deviation, from the predetermined allowable range of differences, is detected therein; and to shut off the fuelling operation until the cause of the abnormality has been rectified.
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