CYLINDER HEAD, CYLINDER HEAD ASSEMBLY, ENGINE, CORE FORMING INTAKE PORT OF CYLINDER HEAD, AND MOLD FOR FORMING THE CORE

摘要

PROBLEM TO BE SOLVED: To provide a cylinder head that can be adjusted a swirl rate further readily.SOLUTION: In a cylinder head, an inner surface of an intake introducing port 25 includes a wall part 24 extending from the termination of a cylinder 10 side of a spiral-shape face 23 to the cylinder side, and a tip 40 on an opposite side to the cylinder side of the wall part 24 is positioned on the cylinder 10 side relative to an opening of the cylinder side of an intake-side valve guide boss 27.