| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust passage structure of an internal combustion engine capable of preventing inflow of exhaust gas of excessively high temperature to a manifold catalyst, while suppressing deviation of the exhaust gas.SOLUTION: An exhaust passage structure includes a cooling rectifier 32 disposed in an exhaust passage 31, and provided with a cooling portion 321 around a rectifying portion 322 to rectify exhaust gas discharged from an internal combustion engine 1 while cooling the same, a catalyst converter 33 disposed in the exhaust passage 31 at the downstream with respect to the cooling rectifier 32 for allowing the exhaust gas rectified by the cooling rectifier 32 to flow therein, and a center flow disturbing member 100 disturbing the exhaust gas flowing near the center of the catalyst converter 33 to increase a flow rate or a flow speed of the exhaust gas flowing near the circumference to be more than that near the center. |
