Composite cylinder head of internal-combustion engine

摘要

A composite cylinder head of an internal-combustion engine comprises a bottom wall part (l) for facing the combustion chamber and a reinforcement part (2) disposed on the side of the bottom wall part opposite to the combustion chamber and functioning as a back-up reinforcement of the bottom wall part, the cylinder head being characterized in that its two parts (l, 2) are respectively formed as separate structures and then joined into a single integral structure and in that the bottom wall part (l) is formed from a metal of higher high-temperature strength and lower thermal conductivity than those of the material of the reinforcement part (2). This cylinder head makes possible the use of a higher maximum pressure within the cylinder than that in the case of a conventional cylinder head.