Fuel pump with automatic shutoff

Details Fuel pump with automatic shutoff Fuel pump with automatic shutoff

2005-03-23

2008-07-01

Koczo, Jr., Michael (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

C417S032000, C417S044200

Reexamination Certificate

active

07393185

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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