Pressure-diecast light-alloy piston for internal combustion engi

Details Pressure-diecast light-alloy piston for internal combustion engi Pressure-diecast light-alloy piston for internal combustion engi

1990-11-05

1991-11-12

Dolinar, Andrew M.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

92222, 92223, 92224, F02F 300

Patent

active

050638947

ABSTRACT:
In a pressure-diecast light-alloy piston for internal combustion engines, which piston comprises shaped fibrous bodies which are partly embedded in at least one of the piston head, ring zone, piston pin bosses and skirt of the piston, which bodies comprise short ceramic fibers, lying in a common plane and in said plane having a random orientation, the improvement wherein the piston (1) is made of a high-temperature magnesium alloy, the piston skirt at least on its sliding surfaces has a chemically applied or electrodeposited metallic sliding layer (3) which has a thickness of about 10 to 30 .mu.m and a hardness of about 740 to 850 HV.sub.0.01, and the inside surface of the piston is coated with a thin plastic paint layer (2) or an anodized magnesium oxide layer.

REFERENCES:
patent: 3596571 (1971-08-01), Hill et al.
patent: 3911891 (1975-10-01), Dowell
patent: 4643078 (1987-02-01), Ban
patent: 4677901 (1987-07-01), Ban et al.
patent: 4798770 (1989-01-01), Donomoto et al.
patent: 4909133 (1990-03-01), Taylor et al.
patent: 4920864 (1990-05-01), Skingle et al.

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