| 摘要 |
PROBLEM TO BE SOLVED: To shorten an exhaust passage while improving a gas fitting property to an exhaust sensor by enhancing disturbance of exhaust at an upstream side of the exhaust sensor.SOLUTION: A structure of an exhaust passage of an internal combustion engine includes a first exhaust pipe 42 provided with a catalyst for clarifying the exhaust, inside thereof, and a second exhaust pipe 44 directly connected to a downstream side of the first exhaust pipe 42 and provided with an exhaust sensor. A projecting portion 49 projecting into the pipe, is disposed on a downstream-side end portion 48 of the first exhaust pipe 42 or an upstream-side end portion 47 of the second exhaust pipe 44 at an upstream side of the exhaust sensor. |
