JPH0466316U

JPH0466316U -

Info

Publication number: JPH0466316U
Application number: JP11023390U
Authority: JP
Priority date: 1990-10-23
Filing date: 1990-10-23
Publication date: 1992-06-11

Description

[Brief explanation of the drawing]

第１図及び第２図は本考案の第１の実施例を示
し、第１図は縦断面図、第２図は排出音とＳＥ／
ＳＭ並びにＤ／ｄとの関係を示す線図である。第
３図は本考案の第２の実施例の１部を切り欠いて
示す斜視図である。第４図Ａ，Ｂはそれぞれ本考
案の他の実施例を示す略示的断面図である。第５
図は従来の排気消音器の１例を示す縦断面図であ
る。本体……１０、膨張室……１，２，３，４、排
気導入管……８、排気流出管……９、ベルマウス
……２０。 1 and 2 show a first embodiment of the present invention, FIG. 1 is a longitudinal cross-sectional view, and FIG. 2 is an exhaust sound and SE/
FIG. 3 is a diagram showing the relationship between SM and D/d. FIG. 3 is a partially cutaway perspective view of a second embodiment of the present invention. 4A and 4B are schematic sectional views showing other embodiments of the present invention, respectively. Fifth
The figure is a longitudinal sectional view showing an example of a conventional exhaust muffler. Main body...10, expansion chamber...1,2,3,4, exhaust inlet pipe...8, exhaust outlet pipe...9, bell mouth...20.

Claims

[Claims for Utility Model Registration] A substantially cylindrical main body, one or more expansion chambers formed inside the main body, an exhaust introduction pipe,
and an exhaust outflow pipe, in which exhaust gas enters the expansion chamber through the exhaust introduction pipe, expands there, and then flows out through the exhaust outflow pipe, wherein a bell mouth is provided at the entrance of the exhaust outflow pipe; The ratio SE/SM of the passage area SE of the exhaust outlet pipe and the passage area SM of the expansion chamber is 0.05≦SE/SM≦0.25, and the diameter D of the bell mouth and the above exhaust outlet An exhaust muffler characterized in that the ratio D/d to the diameter d of the pipe is 1.1≦D/d≦2.0.