Oil contamination detection assembly

Details Oil contamination detection assembly Oil contamination detection assembly

1998-10-07

1999-11-16

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

188 111R, 303 3, 303 20, B60Q 100

Patent

active

059865466

ABSTRACT:
An oil contamination detection assembly includes a resistor having a known resistance which is exposed to the air of a vehicle brake system to accumulate a layer of oil contaminating the air. A heater boils non-carbon elements off the resistor, leaving a carbon residue which decreases the resistance of the resistor. A threshold detector circuit produces an oil contamination warning signal when the decreased resistance of the resistor is less than a predetermined value. The oil contamination detection assembly may be installed in an air line within the pneumatic brake system or integrated into an air dryer within the pneumatic brake system.

REFERENCES:
patent: 4316640 (1982-02-01), Cripe
patent: 5076056 (1991-12-01), Schmidt et al.
patent: 5494342 (1996-02-01), Engle

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