Cylinder head for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKei OKABE
Life of this patent
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Abstract
A cylinder head of an engine in which a thermal stress acting between a valve seat made of clad material and a base metal is reduced. The cylinder head comprises: an inner wall surface; a pair of intake ports arranged adjacent to each other; a valve seat formed of clad material around each intake port; a mask section formed within a predetermined range of a circumference of each intake port to protrude toward a combustion chamber; and a cavity formed between a pair of the mask sections by partially depressing the inner wall surface toward the combustion chamber.
Claims14
A cylinder head for an internal combustion engine, comprising:
- an inner wall surface serving as an inner surface of a combustion chamber;
- a. pair of intake ports arranged adjacent to each other while maintaining a predetermined clearance therebetween, each of which penetrates through the inner wall surface to open toward the combustion chamber;
- a valve seat that is formed of clad material all around an open end of each of the intake ports;
- a mask section that is formed within a predetermined range of a circumference of each of the intake ports to protrude from the circumference of the intake port toward the combustion chamber;
- and
- a cavity having a predetermined shape and a bottom that is formed between a pair of the mask sections by partially depressing the inner wall surface toward the combustion chamber.
Dependencies are inferred from the claim text.