Mono-block cylinder head structure of water cooled engine

Abstract

The object of the present invention is to provide a mono-block cylinder head structure of a water cooled engine which can effectively prevent a reduction in strength of a joint portion due to a concentration of stress of a combustion load on the joint portion between a cylinder portion and a cylinder head ceiling portion without reducing the cooling efficiency by a water jacket, the structure being provided with a water jacket having a water jacket outer wall covering a cylinder upper end portion and a cylinder head ceiling portion in a water cooled engine wherein a reinforcing rib is provided in said Joint portion with said cylinder upper end portion and said cylinder ceiling portion to hold the load generated by combustion in a combustion chamber in said cylinder and release the beat generated by said combustion to a water jacket.

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