CYLINDER HEAD

摘要

A cylinder head is provided to simplify the cylinder head structure by using a longitudinal wall part as a reinforcement rib of the cylinder head to omit separate reinforcement rib installation. A cylinder head comprises: a longitudinal wall part(33) extended in a longitudinal direction(A) and connected to an outer circumferential wall part(32); a first intake wall lateral part(43) extended in a lateral direction(B) and connected to the longitudinal wall part and the outer circumferential wall part; and a boss part(91) for a head bolt. A cam shaft supporting part(44) for intake and a rocker shaft supporting part(54) are formed at the first intake side wall lateral part. In rocker shaft supporting part, a rocker shaft(51) is positioned more downward than a cam shaft(39) for intake. The boss part for the head bolt is arranged in the location which is the downward of the cam shaft supporting part for intake and is overlapped in a vertical direction(C).