| 摘要 |
PURPOSE: An intake port of a cylinder head is provided to improve the engine output and the torque of the engine by increasing the flow coefficient of intake air with the two-stage refractive structure of the intake port. CONSTITUTION: An intake port(100) of a cylinder head is composed of a valve seat part(10) formed in the cylinder head and communicated with a cylinder combustion chamber(11), a connecting part(20) bent and extended to the valve seat part, and a flange part(30) connected to an extension part and communicated to an intake manifold. The connecting part of the intake port is bent two times within the range of 45 angular degrees, and composed of a first extension part(21) bent at 30 angular degrees and extended from the central shaft of the valve seat part, and a second extension part(23) bent at 15 angular degrees and extended from the central shaft of the first extension part. A valve guide part(25) is formed in the first extension part, and the flange part is formed in the second extension part.
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