Oil deterioration detector method and apparatus

Details Oil deterioration detector method and apparatus Oil deterioration detector method and apparatus

1982-11-12

1987-02-24

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

73 64, 324 61R, 331 65, 340 59, 340631, G08B 2100

Patent

active

046460705

ABSTRACT:
The degree of deterioration of lubricating oil used in an internal combustion engine is detected by measuring the lubricating oil dielectric constant with a pair of spaced sensor capacitor electrodes in the lubricating oil. The sensor capacitor is connected to a fixed capacitor to form a voltage divider connected across a constant frequency AC voltage source so that a developed voltage across the sensor capacitor corresponds to the lubricating oil dielectric constant. The frequency of the AC voltage is set at a value ranging from 50 KHz to 500 KHz.

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J. Blom, Journal of Physical Electronics; Scientific Instrumentation, vol. 12, No. 9, pp. 889-893 (Sep. 1979).

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