Pistons and methods for their manufacture

Details Pistons and methods for their manufacture Pistons and methods for their manufacture

F - Mech Eng,Light,Heat,Weapons

02

F

26/152, 121/95

F02F 3/00 (2006.01) F02B 23/06 (2006.01) F02F 3/12 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1217397

ABSTRACT PISTONS AND METHODS FOR THEIR MANUFACTURE 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 aluminium or an aluminium alloy to a ferrous material in order to secure a crown of ferrous material to the remainder of the piston made from aluminium or aluminium alloy. (Fig.1)

434929

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