| 摘要 |
A cylinder head includes: a bottom wall; an outer circumferential wall defining inside thereof a disposition space where valves which open and close combustion chambers, rocker arms, a camshaft which actuates the rocker arms, and a rocker arm shaft which supports the rocker arms are disposed; a longitudinal; a lateral wall, integrally formed with the longitudinal wall and the outer circumferential wall; a camshaft support, formed on the lateral wall; a rocker arm shaft support, formed on the lateral wall in such a manner that a height of the rocker arm shaft is shifted from a height of the camshaft; and a head bolt boss, formed on the bottom wall to overlap the lateral wall in a height direction. The lateral wall includes a passage through which a head bolt is passed into the head bolt boss and which overlaps the head bolt boss in the height direction.
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