Light metal piston for internal combustion engines and method of

Details Light metal piston for internal combustion engines and method of Light metal piston for internal combustion engines and method of

1987-09-04

1990-01-02

Garrett, Robert E.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92225, 291565R, 164 98, 123193P, F16J 104

Patent

active

048905437

ABSTRACT:
A light metal piston for internal combustion engines has a pair of inserts on the inside of upper piston skirt made of a material of lower thermal expansion coefficient than that of the light metal, such as steel. Each insert has a pair of bands which are joined by a connecting portion of the insert in the region of the gudgeon pin boss. Each band extends circumferentially away from the gudgeon pin boss, so as to control thermal expansion of the piston skirt. A free end of each band are bent inwardly, so that the insert can be set firmly on the mold core of the piston during casting operation by snapping the bent portions of the insert into the grooves on the mold core.

REFERENCES:
patent: 3908521 (1975-09-01), Cockcroft
patent: 4074617 (1978-02-01), Cockcroft

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