Piston of light metal

Details Piston of light metal Piston of light metal

1986-07-28

1988-07-05

Wolfe, Jr., Willis R.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

92222, F02F 308

Patent

active

047547316

ABSTRACT:
Light-metal piston for combustion engines, having a sleeve-like insert embedded therein and controlling its heat expansion and being formed of a metal of smaller heat expansion coefficient than the piston base material. The insert is arranged in the solid material of the piston crown and extends around the entire piston periphery. Behind the insert, the piston base material is self-contracted to form a gap delimited by the insert on one side. On at least one edge or one side, the insert is not covered by piston base material, i.e. it extends up to the piston surface, this occurring however only in certain segments and not along the entire piston periphery. In the other segments, the insert lies beneath the piston surface and is thus covered by piston base material. To the extent that the insert is exposed on the piston end face, it is provided with an edge zone covering the depth of the self-contraction gap.

REFERENCES:
patent: 3094903 (1963-06-01), Zollner
patent: 3190273 (1965-06-01), Bachle et al.

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