| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cylinder head having an exhaust port for further improving cooling performance, by improving heat conduction efficiency in an exhaust port inner partition wall itself, in addition to improving cooling performance by a fin. <P>SOLUTION: In this cylinder head 10 in which an exhaust gas flow passage 3b has the adjacent exhaust port 3 via a partition wall 6, the fin 11 for cooling and straightening exhaust gas, is arranged on the upstream side of the exhaust gas flow passage 3b inside of the exhaust port 3, and a partition wall thickness of a part for colliding with the partition wall 6 in the exhaust gas straightened by the fin 11, is thickened more than a partition wall thickness except for the part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
