Capacitive type fuel level and impurity indicator

Details Capacitive type fuel level and impurity indicator Capacitive type fuel level and impurity indicator

Filed on

1982-08-16

Date issued

1984-10-23

Examiner

Caldwell, Sr., John W.

Patent Class

Communications: electrical

SubClass

Condition responsive indicating system

SubSubClass

Specific condition

Other Related Categories

73304C, 73 6112, G08B 2100, G01F 2326

Type

Patent

Status

active

Patent number

044791160

Description

ABSTRACT:
A pump located within the fuel tank discharges fuel into a chamber containing a plurality of reference electrodes which determine the dielectric constant of the fuel. The output of a set of measuring electrodes is calibrated using the dielectric constant determined using the reference electrodes. The fluctuations in the capacitance developed by the reference electrodes due to momentary contact with water droplets or the like can be used to indicate an excess of the water or the like in the fuel.

REFERENCES:
patent: 4296630 (1981-10-01), Jung et al.
patent: 4434657 (1984-03-01), Matsumura
Freeman, John D., "Capacitance Fuel Measurement For Automotive Applications", Society of Automotive Engineers, Inc., pp. 51-57 (1980).
H. F. Grave, Elektrische Messung Nicht Elektrischer Grossen S., 260-266.
Elektronik, 1957, No. 12, S. 360 bis 363.

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