Prediction of engine failure by examination of particle size dis

Details Prediction of engine failure by examination of particle size dis Prediction of engine failure by examination of particle size dis

1974-12-23

1976-09-21

McGraw, Vincent P.

Optics: measuring and testing

Oil testing

356 86, 356102, G01N 3328, G01N 1502

Patent

active

039815846

ABSTRACT:
Method for predicting incipient failure of a lubricated engine by removing a sample of the liquid lubricant employed after the same has been in contact with the moving metal surfaces of the engine. The metal wear particles contained in the lubricant are then separated into at least three predetermined size ranges by passage through membranes having pore openings corresponding in size to such predetermined size. Each of the fractions so separated is analyzed for a selected metal contaminant, such as iron, and the content of such metal contaminant is plotted against the particle size thereof. The likelihood of mechanical failure is determined from the shape of the resulting graph, with a preponderance of large metal contaminant particles being indicative of incipient engine failure.

REFERENCES:
patent: 3526127 (1970-09-01), Sarkis
patent: 3709614 (1973-01-01), Hayakawa
"A Method . . . Wear Particle . . . Oil"; Seifert et al.; Wear, 21 (1972) pp. 27-42.
The Particles of Wear; Scientific American; May 1974; Scott et al. pp. 88-89.

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