| 摘要 |
PROBLEM TO BE SOLVED: To form channel lengths of both front tubes in the same or near the same without combining in an engine, and to thereby reduce a half frequency component generated due to the different lengths of both front tubes even when an engine layout is lowered. SOLUTION: An exhaust tube structure of an internal combustion engine for a vehicle comprises a channel extending unit 6 interposed as a part of a shorter front tube 3b on the way of the tube 3b of both front tubes 3 and 3b. The extending unit 6 has two partition walls 62a, 62b axially extended along two parallel lines for partitioning an end face in a larger-diameter body 61 than the tube 3b, end face partitioning walls 63a, 63b for closing the residual end faces 61b, 61c, 61a and 61b of either one of the upper and lower divided end faces 51a, 61c of the end faces of the partitioned body 61, and communicating holes 64a, 64b formed at different axial positions at both the walls 62a, 62b. COPYRIGHT: (C)2004,JPO
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