| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust pipe structure of an internal combustion engine that can prevent concentration of stress at the upstream end of an exhaust pipe. <P>SOLUTION: In this exhaust pipe structure of an internal combustion engine wherein an exhaust pipe 46 connected to an engine includes a tubular exhaust pipe body 85, a cylindrical part 86 mounted to the upstream end of the exhaust pipe body 85, and a flange part 87 arranged on the cylindrical part 86 and connected to an exhaust port on the engine side, the cylindrical part 86 includes an inclined end face 86b inclined by an angle θ3 with respect to the axis 86E of the cylindrical part 86, and the inclined end face 86b is jointed to an outer peripheral surface 85d of the exhaust pipe body 85, when viewing the most projecting part 86c most projecting in the inclined end face 86b and the most retreating part 86d most retreating from a direction orthogonal to the upper surface 87c of the flange part 87 as a joint surface to the exhaust port on the engine side, a virtual line 97 passing through the most projecting part 86c and the most retreating part 86d is inclined by an angle θ2 with respect to a cylinder axis 75 of the engine 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
