Device for measuring changes in pressure
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United States of America Patent
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Sep 21, 1999
Issued Date -
N/A
app pub date -
Apr 30, 1997
filing date -
Jan 22, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for measuring pressure changes, and preferably for testing the tightness of a fuel tank, wherein a high-pass filter, the time constant of which is greater than the time constant of the pressure changes to be measured and less than the time constant of the pressure changes of the surrounding air, is arranged behind an absolute-pressure sensor pressure in the fuel tank.
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