JPH0218280Y2

JPH0218280Y2 -

Info

Publication number: JPH0218280Y2
Application number: JP4826585U
Authority: JP
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1990-05-22
Also published as: JPS61164417U

Description

【考案の詳細な説明】イ考案の目的イ−１産業上の利用分野本考案は自動車の排気管に付設されるサブマフ
ラに関する。[Detailed Description of the Invention] A. Purpose of the Invention A-1. Field of Industrial Application The present invention relates to a sub-muffler attached to an automobile exhaust pipe.

イ−２従来技術従来、自動車の排気管にはメインマフラの上流
に位置してサブマフラを付設して排気音の消音効
果を高めており、通常該サブマフラは１個排気管
に直列的に配置されている。A-2 Prior Art Conventionally, a sub-muffler has been attached to the exhaust pipe of an automobile, located upstream of the main muffler, to enhance the silencing effect of exhaust noise, and usually one sub-muffler is arranged in series with the exhaust pipe. ing.

イ−３本考案が解決しようとする問題点排気管を消音するには消音室をより多く設ける
ことがよいが、前記の如く、排気管に対して直列
的にマフラを配置する形式では、自動車の底面部
のスペース上よりマフラを多数配置することが困
難であり、消音効果を高めるにも限度がある。そ
こで本考案は、通常、サブマフラが設置されてい
る部分におけるプロペラシヤフトを介した反対側
の部分には、サブマフラを設置できるスペースが
あることに鑑み、該スペース部にもサブマフラを
設置して、消音効果を従来のものより更に一層向
上させることができるようにしたサブマフラを提
案することを目的とするものである。A-3 Problems to be solved by the present invention In order to muffle exhaust pipe noise, it is better to provide more muffler chambers, but as mentioned above, the muffler is arranged in series with the exhaust pipe, It is difficult to arrange a large number of mufflers due to the space on the bottom of the muffler, and there is a limit to how much noise can be silenced. Therefore, in consideration of the fact that there is usually a space where a sub-muffler can be installed on the opposite side of the propeller shaft from where the sub-muffler is installed, the present invention has been developed by installing a sub-muffler in that space as well, to reduce noise. The object of the present invention is to propose a sub-muffler whose effectiveness can be further improved compared to conventional ones.

ロ考案の構成ロ−１問題点を解決するための手段本考案は前記の問題点を解決するために、排気
管１に直列的に備えた第１サブマフラ２と、該第
１サブマフラ２と並列的に設けた第２サブマフラ
８と、該両サブマフラ２，８とを連通する連通パ
イプとよりなり、前記両サブマフラ２，８の相互
の配置間隔を、これらが自動車のプロペラシヤフ
トの両側部に位置するように設定したことを特徴
とするものである。B. Structure of the invention B-1. Means for solving the problems In order to solve the above-mentioned problems, the present invention provides a first sub-muffler 2 provided in series with the exhaust pipe 1, and a first sub-muffler 2 in parallel with the first sub-muffler 2. It consists of a second sub-muffler 8, which is provided at a central location, and a communication pipe that communicates the two sub-mufflers 2, 8, and the distance between the two sub-mufflers 2, 8 is determined by the distance between the two sub-mufflers 2, 8 when they are located on both sides of the propeller shaft of an automobile. It is characterized by being set to do so.

ロ−２作用エンジンよりの排気音は、排気管１を通じて第
１サブマフラ２内に流入すると共に連通パイプに
より第２サブマフラ８内に流入する。そのため、
排気音は２個のサブマフラ２，８により消音さ
れ、従来の１個のサブマフラに比較してその消音
効果が大きくなる。RO-2 Effect Exhaust noise from the engine flows into the first sub-muffler 2 through the exhaust pipe 1 and flows into the second sub-muffler 8 through the communication pipe. Therefore,
Exhaust noise is muffled by the two sub-mufflers 2 and 8, and the muffling effect is greater than that of the conventional single sub-muffler.

ロ−３実施例次に図面に示す本考案の実施例について説明す
る。RO-3 Embodiment Next, an embodiment of the present invention shown in the drawings will be described.

１はエンジンよりの排気管、２は該排気管１に
直列的に設けた第１サブマフラで内部にインナパ
イプ３が貫通しこれに前記排気管１が連結されて
いる。該インナパイプ３の後流端は排気管４を通
じてメインマフラ５に連通している。また該イン
ナパイプ３には穴６が多数形成されており、第１
サブマフラ２内が高周波共鳴室７になつている。
８は第２サブマフラで、前記第１サブマフラ２と
並列的に配置され、かつ前記第１サブマフラ２を
自動車のプロペラシヤフト９の１側部に配置した
場合に第２サブマフラがプロペラシヤフト９の他
側部に配置されるように第１サブマフラ２との間
隔が設定されている。更に該第２サブマフラ８
は、前記第１サブマフラ２内のインナパイプ３の
上流部と下流部に分岐的に設けた上流側連通パイ
プ１０と下流側連通パイプ１１とにより支持され
ていると共に該両連通パイプ１０，１１の先端部
が第２サブマフラ８内に夫々開口され、該第２サ
ブマフラ８内が低周波共鳴室１２に形成されてい
る。また、前記両連通パイプ１０，１１は、プロ
ペラシヤフト９の下部を迂回するように中央部を
下方にわん曲させてもよい。尚、該第１及び第２
サブマフラ２，８を連通する連通パイプは、図示
の如く２本設けてもよいが、１本でもよい。 1 is an exhaust pipe from the engine; 2 is a first sub-muffler provided in series with the exhaust pipe 1; an inner pipe 3 passes through the inside thereof, and the exhaust pipe 1 is connected to the first sub-muffler; A downstream end of the inner pipe 3 communicates with a main muffler 5 through an exhaust pipe 4. Further, the inner pipe 3 is formed with a large number of holes 6, and the first
The inside of the submuffler 2 serves as a high frequency resonance chamber 7.
Reference numeral 8 denotes a second sub-muffler, which is arranged in parallel with the first sub-muffler 2, and when the first sub-muffler 2 is arranged on one side of the propeller shaft 9 of the automobile, the second sub-muffler is arranged on the other side of the propeller shaft 9. The distance between the first sub-muffler 2 and the first sub-muffler 2 is set so that the first sub-muffler 2 is disposed at a certain distance. Furthermore, the second sub-muffler 8
is supported by an upstream side communication pipe 10 and a downstream side communication pipe 11 which are branchedly provided at the upstream and downstream parts of the inner pipe 3 in the first sub-muffler 2, and is connected to both the communication pipes 10 and 11. The tip portions are respectively opened into the second sub-muffler 8, and the inside of the second sub-muffler 8 is formed as a low frequency resonance chamber 12. Moreover, the central portions of both the communication pipes 10 and 11 may be curved downward so as to bypass the lower part of the propeller shaft 9. In addition, the first and second
The number of communication pipes that communicate the sub-mufflers 2 and 8 may be two as shown in the figure, but it may also be one.

また、第１サブマフラ２を低周波共鳴室に形成
し第２サブマフラ８を高周波共鳴室に形成しても
よい。図中、１３は車輪を示す。 Alternatively, the first sub-muffler 2 may be formed in a low-frequency resonance chamber, and the second sub-muffler 8 may be formed in a high-frequency resonance chamber. In the figure, 13 indicates a wheel.

ハ考案の効果以上のように本考案によれば、自動車のプロペ
ラシヤフトの両側におけるスペースを利用して２
個のサブマフラを容易に配置することができ、そ
のため２個のサブマフラによつてエンジンよりの
排気音の消音効果を向上させることができる特徴
がある。C. Effect of the invention As described above, according to the invention, two
It is possible to easily arrange two sub-mufflers, and therefore the two sub-mufflers can improve the muffling effect of the exhaust noise from the engine.

[Brief explanation of the drawing]

図面は本考案の実施例を示すもので、第１図
は、配置状態を示す斜視図、第２図は同平面図、
第３図はサブマフラの平断面図、第４図はサブマ
フラの正面図である。１……排気管、２……第１サブマフラ、８……
第２サブマフラ、９……プロペラシヤフト、１
０，１１……連通パイプ。 The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the arrangement state, FIG. 2 is a plan view of the same,
FIG. 3 is a plan sectional view of the sub-muffler, and FIG. 4 is a front view of the sub-muffler. 1... Exhaust pipe, 2... First sub muffler, 8...
2nd sub-muffler, 9... Propeller shaft, 1
0,11...Communication pipe.

Claims

[Scope of utility model registration request]

A first sub-muffler 2 provided in series with the exhaust pipe 1
, a second sub-muffler 8 provided in parallel with the first sub-muffler 2, and a communication pipe that communicates the two sub-mufflers 2, 8, and the two sub-mufflers 2,
8. A sub-muffler for an automobile, characterized in that the mutual spacing between the mufflers is set such that these are located on both sides of a propeller shaft of the automobile.