Oil quality sensor for use in a motor

Details Oil quality sensor for use in a motor Oil quality sensor for use in a motor

1996-04-25

1998-08-04

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Lubricant testing

204409, 324449, 324663, 324698, 422 8201, 422 8202, G01N 2726, G01N 3330

Patent

active

057896658

ABSTRACT:
Method and apparatus for determining deterioration of e.g. lubricating oil by measuring the electrical properties of a polymeric matrix (support) holding charged ionic groups. The dynamic range of the device is increased by creating a local polar environment formed around the charged groups of the polymeric matrix and by exploiting bead shrinkage with increasing degradation (or solvent polarity). Both approaches can be further employed in a single sensor by the use of multiple chambers containing a combination of the above. Also, contaminant detection is improved by detecting changes in amplitude and/or frequency of noise output. The sensor can also be used to detect a level of oil for instance in an engine oil pan.

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Mike Allen, "Car Clinic--Dirty Deads Done Dirt Cheap", Popular Mechanics, Aug. 1993, p. 71.

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