| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust pipe structure capable of introducing exhaust gas into a catalyst converter in a well balanced manner even when the catalyst converter is arranged greatly offset.SOLUTION: An exhaust pipe structure 5a to which a catalyst converter 90 is attached right near an engine 1 includes: a plurality of exhaust passages 51a-51d; and a collection part 60. In the collection part 60 arranged at the end of a cylinder bank between the first exhaust passage 51a and the second exhaust passage 51b out of the plurality of exhaust passages, a swirl structure is provided for swirl-guiding an exhaust gas flow passing therethrough. Each of the third exhaust passage 51c and the fourth exhaust passage 51d has an upward curved part 70. An exhaust gas flow passing through each of them enters into the collection part 60 while being guided obliquely downward by the upward curved part 70, and moves toward the catalyst converter 90 while being guided by the swirl structure. |
