Malfunction detector for an oil-fuel heat exchanger

Details Malfunction detector for an oil-fuel heat exchanger Malfunction detector for an oil-fuel heat exchanger

1993-04-26

1995-03-21

Groody, James J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340618, 73290R, B60Q 100

Patent

active

054000106

ABSTRACT:
A detector for detecting the level of oil in an oil reservoir is disclosed having particular application for use in a lubricating system of a gas turbine engine in order to determine a malfunction of an oil-fuel heat exchanger. The device uses an electrically actuated level sensor within the oil reservoir connected to a first electrical circuit having an outlet junction at which is applied a voltage U.sub.1 which varies with the level of oil in the reservoir, and a second circuit having a second outlet junction at which is applied a voltage U.sub.2 which decreases as the oil level decreases, but which does not increase as the oil level increases. A comparison circuit connected to the outlet junctions of the first and second circuits compares the difference between the voltages U.sub.1 and U.sub.2 to a predetermined reference voltage U.sub.0 and, if the difference exceeds this reference voltage, provides an output signal to actuate a visual indicator.

REFERENCES:
patent: 4163391 (1979-08-01), Bezard et al.
patent: 4721941 (1988-01-01), Robine et al.
Japanese Abstract (52-221122)--vol. 8, No, 75 (P-266) (1512) Apr. 7, 1984.

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