| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder head of an engine capable of smoothing flow of a gas in an intake port and suppressing lowering of a flow speed of the gas in the intake port.SOLUTION: A body portion 19 composed of a curved surface, and a guide boss-correspondence projecting portion 20 having a bottom surface-correspondence plane portion 55 approximately corresponding to a bottom surface 11 of a valve guide boss insertion hole 10 and projecting inward from the body portion 19, are disposed on an inner surface of an intake port of a cylinder head of an engine. Further a stagnation-suppressing projecting portion 21 having a part positioned at a downstream side of a flow of a gas with respect to a valve in a state of mounting the valve on the intake port, and projecting inward from the body portion 19, is disposed on the inner surface of the intake port of the cylinder head. |
