| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust manifold capable of reducing man-hours for bending work. SOLUTION: In the exhaust manifold, a part of an exhaust pipe 35 between an expanded pipe part 25 and a bent part 13 located at a position nearest to the expanded pipe part 25 is a straight pipe part 14, a center line 14L of the straight pipe part 14 is inclined to a center line 27L of a pipe insert hole 27 byθ, and the expanded pipe part 25 is expanded so that it is ovalized or an external circumference length is longer than external circumference lengths of an of the straight pipe part 14, and is bent at a point P so that a center line of an ovalized oval pipe part or a center line 25L of the expanded pipe part 25 that is expanded is conformed to the center line 27L of the pipe insert hole 27. Thus, a third exhaust pipe 35 is bent at one bent part 13. A conventional third exhaust pipe is bent at least at two parts, so that man-hours of bending work with a pipe bender are increased. The exhaust pipe is bent at one part and has less bent parts, so that man-hours of bending work with a pipe bender are reduced. COPYRIGHT: (C)2010,JPO&INPIT
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