| 摘要 |
An intake/exhaust valve seal structure for an internal combustion engine is disclosed. A sealing surface (73, 74) is formed by a valve seat surface (62, 63) in a ceiling (61) of a combustion chamber (25) and a valve face surface (52, 55) provided on an intake/exhaust valve (28, 29). The sealing surface lies on a first conical surface (71, 72) having an axis (44b, 47b) of the intake/exhaust valve as its rotation axis and includes a line of intersection (62a, 63a) of the first conical surface with an inner wall face (65) of the ceiling of the combustion chamber. A method for manufacturing the intake/exhaust valve is also disclosed.
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