Method of detecting soot in engine oil using microwaves

Details Method of detecting soot in engine oil using microwaves Method of detecting soot in engine oil using microwaves

1980-12-19

1982-08-17

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

73 64, G01R 2704

Patent

active

043452027

ABSTRACT:
To measure the percentage of soot in a diesel engine crankcase oil without any significant influence by oil additives or contaminants which build up in the oil during usage. The relative permittivity of the oil is measured in the microwave region of 8-12 GHz (X band). For soot content up to about five percent, the relative permittivity of the oil is a substantially linear function of the soot content.

REFERENCES:
patent: 3424002 (1969-01-01), Johnson
patent: 3474337 (1969-10-01), Petrick
patent: 3626284 (1971-12-01), Bak
patent: 4104585 (1978-08-01), Schofield
patent: 4281533 (1981-08-01), Eesley et al.
Frassa et al., Society of Automotive Engineers (680759), Diesel Engine Condition Through Oil Analysis, Oct. 29-31, 1968, pp. 1-16.

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