Pistons for an internal combustion engine
AssigneeBorgo-Nova SpA
InventorLudovico Bruni
Life of this patent
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Abstract
A piston for an internal combustion engine is described, the piston having a lower crown portion and an upper crown portion, the upper crown portion including a combustion bowl and a piston ring-groove belt of generally annular form depending from the outer periphery of the crown surface, the lower crown portion comprising a generally circular plate member having an upstanding ring on the upper surface thereof, the upper crown portion and the lower crown portion being joined together by retention means between the combustion bowl and the upstanding ring, and between co-operating spigot and socket means formed on the base of the combustion bowl and on the plate member, to prevent withdrawal by axial forces, and there being an oil cooling gallery defined between the upper crown portion and the lower crown portion.
Claims10
A piston for an internal combustion engine includes a lower crown portion and an upper crown portion, the upper crown portion including a combustion bowl and a piston ring-groove belt of generally annular form depending from the outer periphery of the crown surface, the lower crown portion comprises a generally circular plate member having an upstanding ring on the upper surface thereof, the upper crown portion and the lower crown portion are joined together by retention means between the combustion bowl and the upstanding ring, and between co-operating spigot and socket means formed on the base of the combustion bowl and on the plate member, to prevent withdrawal by axial forces, and there is an oil cooling gallery defined between the upper crown portion and the lower crown portion.
Dependencies are inferred from the claim text.