EXHAUST PIPE PART AND EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

(Problem) To provide an exhaust pipe part and an exhaust apparatus for an internal combustion engine which can make unnecessary the muffler used in the conventional apparatus, and make small in size a sound deadening device mounted on the part of the exhaust pipe while reducing exhaust noises, and can reduce the weight and the production cost thereof. (Solving Means) An tail pipe part 41 is provided on a tail pipe 28 to constitute part of the tail pipe 28, and has a hollow member 42 connected with the tail pipe 28 in axial alignment with the tail pipe 28 to be positioned within an area covering a node portion in a sound pressure distribution of an air column resonance caused in the tail pipe 28, and a short pipe 43 provided in the hollow member 42 and having a predetermined length to extend in the axial direction of the tail pipe 28, the short pipe 43 having an open end 43a at the upstream end thereof and a closed end at the downstream end thereof, the closed end being constituted by a bottom plate 43b positioned at almost the same position as that of the node portion in the sound pressure distribution of a standing wave formed by the air column resonance caused in the tail pipe 28.