Capacitive oil deterioration and contamination sensor

Details Capacitive oil deterioration and contamination sensor Capacitive oil deterioration and contamination sensor

1997-03-06

1998-10-20

Dombroske, George M.

Measuring and testing

Test stand

For engine

701 29, 324378, 324382, 324 711, G01M 1500

Patent

active

058248897

ABSTRACT:
An oil deterioration and contamination sensor includes a housing, a substrate with a first capacitive plate mounted within the housing, a second capacitive plate mounted to the housing close to the first capacitive plate, and a total reference capacitor which includes an external fixed reference capacitor. The second capacitive plate is mounted to the housing such that at least one fluid including oil freely circulates within a gap between the first and second capacitive plates thereby defining an oil deterioration and contamination sensor capacitor. The respective capacitances of the oil deterioration and contamination capacitor and the total reference capacitor provide an indication of a dielectric constant of the at least one fluid including oil within the gap. The sensor also includes circuitry for generating the indication of a dielectric constant and oil contamination detection circuitry adapted to receive and process the indication of a dielectric constant and to generate an indication of oil contamination when a dielectric constant of the at least one fluid including oil exceeds a predetermined value or exceeds a predetermined value at a rate of dielectric constant change in excess of a maximum ordinary rate of oil dielectric constant change.

REFERENCES:
patent: 2462715 (1949-02-01), Booth
patent: 2807956 (1957-10-01), Doble
patent: 3046537 (1962-07-01), Dow
patent: 3067385 (1962-12-01), Rykoskey
patent: 3196667 (1965-07-01), Alquist et al.
patent: 3424977 (1969-01-01), Krobath
patent: 3522530 (1970-08-01), Muller
patent: 3523245 (1970-08-01), Love et al.
patent: 3622875 (1971-11-01), Bunjiro Ichijo
patent: 3675121 (1972-07-01), Thompson
patent: 3746974 (1973-07-01), Stoakes et al.
patent: 3816811 (1974-06-01), Cmelik
patent: 3876916 (1975-04-01), Stoakes
patent: 4048844 (1977-09-01), Dunikowski et al.
patent: 4064455 (1977-12-01), Hopkins et al.
patent: 4227419 (1980-10-01), Park
patent: 4345202 (1982-08-01), Nagy et al.
patent: 4398426 (1983-08-01), Park et al.
patent: 4468611 (1984-08-01), Tward
patent: 4470300 (1984-09-01), Kobayashi
patent: 4559493 (1985-12-01), Goldberg et al.
patent: 4646070 (1987-02-01), Yasuhara et al.
patent: 4733556 (1988-03-01), Meitzler et al.
patent: 4806847 (1989-02-01), Atherton et al.
patent: 4899102 (1990-02-01), Hendrick et al.
patent: 4945863 (1990-08-01), Schmitz et al.
patent: 5103184 (1992-04-01), Kapsokavathis et al.
patent: 5125265 (1992-06-01), O'Connell et al.
patent: 5179926 (1993-01-01), Ament
patent: 5182523 (1993-01-01), Ertel et al.
patent: 5205151 (1993-04-01), Shimamura et al.
patent: 5261270 (1993-11-01), Gonze et al.
patent: 5262732 (1993-11-01), Dickert et al.
patent: 5274335 (1993-12-01), Wang et al.
patent: 5281922 (1994-01-01), Lofgren et al.
patent: 5283711 (1994-02-01), Schmitz
patent: 5284056 (1994-02-01), Randolph et al.
patent: 5309110 (1994-05-01), O'Neill et al.
patent: 5313168 (1994-05-01), Ogawa
patent: 5331845 (1994-07-01), Bal et al.
patent: 5337017 (1994-08-01), Ogawa
patent: 5367264 (1994-11-01), Brabetz
patent: 5418465 (1995-05-01), Seipler et al.
patent: 5435170 (1995-07-01), Voelker et al.
patent: 5488311 (1996-01-01), Kamioka et al.
patent: 5540086 (1996-07-01), Park et al.
patent: 5604441 (1997-02-01), Freese, V et al.
Harrison, Dean R. and Dimeff, John; "Transducers"; Rev. Sci. Instrum., vol. 44, No. 10, Oct. 1973, pp. 1468-1472.

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