JPS60139034U

JPS60139034U - Internal combustion engine exhaust system

Info

Publication number: JPS60139034U
Application number: JP2776284U
Authority: JP
Inventors: 靖彦中野; 亮策西山
Original assignee: 本田技研工業株式会社
Priority date: 1984-02-28
Filing date: 1984-02-28
Publication date: 1985-09-13

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の排気装置の概略断面図、第２図以下は本
考案の実施例を示すもので、第２図は自動二輪車の側面
図、第３図は第２図における排気装置の一部切欠き斜視
図、第４図イは第３図における■矢視部分の断面図、第
４図口は第４図イにおける■ロー■口線断面図、第５図
は第２の実施例を示す排気装置の一部切欠き斜視図、第
６図は第５図における■矢視部分の断面図、第７図は第
３の実施例を示す排気装置の一部切欠き斜視図、第８図
は第７図における■矢視部分の断面図である。　　　　
　　　　　７１０・・・・・・排気装置、１１・・・・・・エンジン
、２３・・・・・・排気管、２４・・・′・・・分岐部
、２５，２６・・・・・・膨張管、２５ａ、２６ａ・・
・・・・拡大部、２５ｂ、２６ｂ　　　　　−・・・・
・・ストレート部、２５ｃ、２６ｃ・・・・・・縮小部
、２５ｄ、２６ｄ・・・・・・反射壁、Ａ・・・・・・
共通の管壁。Figure 1 is a schematic cross-sectional view of a conventional exhaust system, Figure 2 and the following diagrams show embodiments of the present invention, Figure 2 is a side view of a motorcycle, and Figure 3 is a schematic cross-sectional view of the exhaust system in Figure 2. Fig. 4A is a sectional view of the part viewed from the ■ arrow in Fig. 3, Fig. 4 is a cross-sectional view taken along the ■low - opening line in Fig. 4A, Fig. 5 is the second embodiment. FIG. 6 is a sectional view of the part shown by the arrow ■ in FIG. 5; FIG. 7 is a partially cutaway perspective view of the exhaust device showing the third embodiment; FIG. 8 is a cross-sectional view of the portion shown by the arrow ■ in FIG. 7.
7 10... Exhaust system, 11... Engine, 23... Exhaust pipe, 24...'... Branch, 25, 26... Expansion tube, 25a, 26a...
... Enlarged section, 25b, 26b ---
...Straight part, 25c, 26c...Reduced part, 25d, 26d...Reflection wall, A...
Common pipe wall.

Claims

[Scope of utility model registration request]

A plurality of expansion pipes, each of which has an enlarged part, a straight part, and a contracted part that are different in shape from each other, are branched and connected to the exhaust pipe connected to the exhaust port of the internal combustion engine. In an exhaust system equipped with a switching valve that selectively opens and closes each expansion pipe according to operating conditions, each of the expansion pipes is formed so as to have at least a part of its pipe wall in common. An exhaust system for an internal combustion engine characterized by: