The invention relates to the technical field of
internal combustion engine exhaust devices, in particular to an
internal combustion engine exhaust pipe which comprises an exhaust
tail pipe, a sealing plate, a sliding block, a transmission
assembly and a limiting
assembly are arranged on the exhaust
tail pipe, and when a vehicle runs normally, the limiting
assembly keeps the sealing plate in the state that the axis of the sealing plate is perpendicular to the rotation axis of the exhaust
tail pipe; therefore, the blocking area of the sealing plate to the gas in the linear tail pipe is ensured to be at the minimum value, and the exhaust effect of the
exhaust pipe is ensured; when a vehicle enters a
road surface with accumulated water higher than the lower dead center of the sliding block, the sliding block moves up and down according to the height of the accumulated water on the
road surface, limitation of the limiting assembly on the sealing plate is relieved when the sliding block moves upwards, and meanwhile up-down movement of the sliding block is converted into horizontal rotation of the sealing plate through the transmission assembly. When the vehicle flames out and the accumulated water on the
road surface is higher than the lowest point in the linear tail pipe, the sealing plate completely seals the interior of the linear tail pipe, and it is guaranteed that the accumulated water on the road surface cannot continue to move forwards after reaching the linear tail pipe when the vehicle flames out due to wading.