Method for magnetically determining the degree of wear of a pist

Details Method for magnetically determining the degree of wear of a pist Method for magnetically determining the degree of wear of a pist

1976-06-10

1979-03-06

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324228, 73 7, 73120, 33DIG17, 340 52R, G01R 3312

Patent

active

041433190

ABSTRACT:
A method for determining the degree of the wear condition of a piston ring in sliding contact with a cylinder wall of an internal combustion engine. The piston ring has a defined magnetic property which property in sliding contact with the wall may be varied by a chromium plating. The reluctance of a magnetic field of an inductive sensor located in the cylinder wall is varied as the piston ring reciprocates and wears. The reluctance variation is compared with a predetermined reference level of the magnetic property for an acceptable degree of wear for the ring.

REFERENCES:
patent: 3975706 (1976-08-01), Kato

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