Hybrid piston for high temperature engine

Details Hybrid piston for high temperature engine Hybrid piston for high temperature engine

1989-12-05

1991-07-09

Dolinar, Andrew M.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

92155, 92221, F02F 302

Patent

active

050295624

ABSTRACT:
Piston has upper and lower portions. The upper portion includes a cylinder engaging surface, such as a piston ring, comprised of solid lubricant. The lower portion includes a cylinder engaging surface comprised of liquid lubricant control means. The distance between the upper and lower cylinder engaging surfaces is sufficient to provide a temperature differential of at least 316.degree. C. (600.degree. F.) between the upper and lower portions during normal engine operations. This differential is adequate to maintain the temperature of the cylinder at the bottom ring reversal point at a temperature below the breakdown temperature of a liquid lubricant when the temperature of the cylinder liner at the top ring reversal point is at a temperature above the breakdown temperature of the liquid lubricant.

REFERENCES:
patent: 2419192 (1947-04-01), Anderson
patent: 2557497 (1951-06-01), Carney
patent: 4787295 (1988-11-01), Obermeir-Wagner et al.

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