Oil deterioration detector method and apparatus
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United States of America Patent
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-
Feb 24, 1987
Grant Date -
N/A
app pub date -
Nov 12, 1982
filing date -
Nov 17, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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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