HEAD COVER FOR INTERNAL COMBUSTION ENGINE

摘要

The portion of the ceiling wall (14) of a head cover (10) opposed to an air-intake collection chamber (51) is made in the form of a concave ceiling wall (20) forming a concave surface relative to the air-intake collection chamber (51). Furthermore, a recessed groove (21) recessed toward the head cover inner surface side is formed in the concave ceiling wall (20).