| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cylinder head having an exhaust port structure, the cylinder head capable of striking a balance between the cooling of an exhaust gas in a continuous operation and the keeping of the exhaust gas warm in a warm-up operation. <P>SOLUTION: The cylinder head 10 is configured to have an exhaust port liner 8, which is a cylinder member, disposed in an exhaust port 1 and to have a microscopic gap 13 provided between an outer circumference of the exhaust port liner 8 and an inner circumference of the exhaust port 1, wherein a heat transfer member is arranged in the outer circumference of the exhaust port liner 8 and a microscopic gap 13a is provided between the heat transfer member and the inner circumference of the exhaust port. <P>COPYRIGHT: (C)2013,JPO&INPIT |
