Oil deterioration detector

Electricity: measuring and testing – Electrolyte properties – Using a ph determining device

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324698, 340438, G01R 2708

Patent

active

055236928

ABSTRACT:
An oil deterioration detector comprising a sensitive electrode whose electric potential varies in response to acidity and/or basicity of oil to be measured, and a reference electrode associated with this sensitive electrode. An electrically conductive housing accommodates the sensitive electrode and the reference electrode together with the oil. A potential difference detector detects oil deterioration by measuring a potential difference between the sensitive electrode and the reference electrode. And, an insulating member is interposed between these electrodes and the electrically conductive housing for electrically insulating these electrodes from the electrically conductive housing. The reference electrode is grounded together with the electrically conductive housing. An insulating, hydrophilic porous member would be interposed between the sensitive electrode and the reference electrode.

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Daniel J. Soltz, "High MOS Impedance Benefits pH Measurement", Jul. 1966, Electronics (TK7800.E58), p. 79.
"Oil-Degradation Monitors--GM Could Be First"; The Hansen Report on Tutomotive Electronis; A Business and Technology Newsletter; vol. 6, No. 6; Jul./Aug. 1993.
Hirosawa et al:, "Development of Deterioration Sensor for Engine Oil", Japanese Automobile Article 921, 1992-5, pp., 123-126 month unavailable.
Fog et al:. "Electronic Semiconducting Oxides as .sub.p H Sensors", Sensors and Actuators, 5(1984), pp. 137-146 month unavailable.
Kinoshita et al: "Electrochemical Measurements on Pt, Ir, and Ti Oxides as .sub.p H Probes"; Electrochem. Soc.: Electrochemical Science And Technology; May, 1984, pp. 1089-1094.

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