Pistons and method for their manufacture

Details Pistons and method for their manufacture Pistons and method for their manufacture

1983-08-22

1985-11-19

Look, Edward K.

Expansible chamber devices

Piston

With enclosed insulating space in piston part

291565R, 92231, F04B 3108

Patent

active

045534721

ABSTRACT:
A piston for an internal combustion engine is provided with a crown portion heat insulated from the remainder of the piston over all or substantially all of the area of the crown, to reduce the transfer of heat from the crown to the remainder of the piston. The insulation may be by a chamber extending across the piston and the chamber may contain a vacuum. Such a piston can be manufactured by a process involving roll-bonding aluminum or an aluminum alloy to a ferrous material in order to secure a crown of ferrous material to the remainder of the piston made from aluminum or aluminum alloy.

REFERENCES:
patent: 1245641 (1917-11-01), Verplanck
patent: 1719215 (1929-07-01), Faroy et al.
patent: 1723187 (1929-08-01), Lemieux
patent: 3190273 (1965-06-01), Bachle et al.
patent: 4242948 (1981-01-01), Stang et al.
patent: 4372194 (1983-02-01), Vallaude

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