Fuel pump with automatic shutoff
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United States of America Patent
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-
Jul 1, 2008
Grant Date -
Sep 29, 2005
app pub date -
Mar 23, 2005
filing date -
May 31, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pressure sensor subsystem measures the pressure within a fuel pump and outputs an under-pressure signal when the measured pressure is below a predetermined threshold pressure value. A temperature sensor subsystem measures the temperature within the fuel pump and outputs an over-temperature signal when the measured temperature is above a predetermined threshold temperature value. A timing circuit monitors the pressure sensor subsystem and the temperature sensor subsystem for output of the under-pressure and over-temperature signals and outputs a pump disconnect signal when at least one of the signals is output for a prescribed time duration. A power controller disengages power from the pump upon output of a pump disconnect signal by the timing circuit.
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