Piston ring for an internal combustion engine

Details Piston ring for an internal combustion engine Piston ring for an internal combustion engine

1984-01-17

1985-06-11

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277224, 277DIG6, F16J 920

Patent

active

045224153

ABSTRACT:
A piston ring (1) made of ceramic materials for an internal combustion engine comprising a body made by sintering of partially stabilized zirconium oxide (PSZ) which has a porosity <3% and, rolling surface (4) of the piston ring having a centerline average roughness R.sub.a of 0.03 to 0.1 .mu.m. Due to its homogeneous structure, the inventive piston ring avoids the problems of the ceramic/metal bond of known piston rings and, even under high thermal load, does not suffer from thermally induced destruction or welding of the piston ring groove.

REFERENCES:
patent: 3727927 (1973-04-01), Packard
SAE Technical Paper Series, 820505 Wacker, et al.
SAE Technical Paper Series, 820429, Woods, et al.

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