Cylinder head construction for an internal combustion engine

Details Cylinder head construction for an internal combustion engine Cylinder head construction for an internal combustion engine

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F02F 1/38 (2006.01) F01L 3/02 (2006.01)

Patent

CA 1057607

A CYLINDER HEAD CONSTRUCTION FOR AN INTERNAL COMBUSTION ENGINE ABSTRACT OF THE DISCLOSURE A cylinder head construction for a reciprocating piston internal combustion engine is disclosed, said head providing decreased valve wear without use of expensive inserts. The use of a hypereutectic aluminum-silicon alloy, preferably containing controlled amounts of copper and mag- nesium, is deployed for the head casting. Valves operating within said casting are fabricated of a ferrous based material which retains strength under high temperature conditions, the valve is provided with a hard facing along the valve lip which engages the valve seat. The facing con- sists essentially of a cobalt-chromium alloy containing preferably by weight 5% tungsten and 10% carbon, the chromium being limited to about 26%.

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