| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder head cooling structure for internal combustion engine capable of effectively cooling a central part of a cylinder head and suitably distributing the flow of cooling water for a whole of the cylinder head so as to improve cooling efficiency. SOLUTION: A cooling water path 5 is provided with an intake side cooling path 6 formed between an intake port wall part and a cylinder head peripheral wall part 4, an exhaust side cooling path 8 formed between an exhaust port wall part and the cylinder head peripheral wall part 4, and a central cooling path 7 formed between the intake port wall part and the exhaust port wall part. A communication path 34 is formed for communicating the central cooling path 7 and at least one of the intake side cooling path 6 and the exhaust side cooling path 8. A large flow part and a small flow part are formed on the central cooling path 7 through the communication path 34. A ratio of the large flow part in a central part 37 of the central cooling path is higher than a ratio of the large flow part in an end part of the central cooling path 7 other than the central part 37.
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