| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake pipe of an internal combustion engine, capable of suitably suppressing the deterioration of a gasket resulting from the residence of oil, and to provide an intake system structure of the internal combustion engine.SOLUTION: A protrusion 15 is formed on the inner wall at the lower part in the vertical direction of a connection end 12 of an intake manifold of the internal combustion engine. A gasket 20 is stored in a storage groove 13 formed in an end face 12a of the connection end 12 opposed to a cylinder head 51. In the inner wall of the connection end 12 at a position on the downstream side of the protrusion 15, a hole 16 communicated with the storage groove 13 is provided along an axial direction L of the connection end 12. In the inner peripheral face at the lower part in the vertical direction of the gasket 20, a communication passage 32 is formed to communicate a clearance formed by the end face 12a of the connection end 12, an end face 51a of the cylinder head 51 opposed thereto and the inner peripheral face of the gasket 20, with the hole 16. |
