JPS6137443B2 - - Google Patents
Info
- Publication number
- JPS6137443B2 JPS6137443B2 JP52031973A JP3197377A JPS6137443B2 JP S6137443 B2 JPS6137443 B2 JP S6137443B2 JP 52031973 A JP52031973 A JP 52031973A JP 3197377 A JP3197377 A JP 3197377A JP S6137443 B2 JPS6137443 B2 JP S6137443B2
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- muffler
- outer cylinder
- rear end
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 230000030279 gene silencing Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001743 silencing effect Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
この発明は、オートバイのような小型エンジン
に用いる内燃機関のマフラの改良に関する。DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in mufflers for internal combustion engines used in small engines such as motorcycles.
オートバイのように小型エンジンの場合は、マ
フラの容積に限度があつて、長く大きいマフラを
用いることができない。一般にマフラは、内部を
数室の消音室に仕切つて使用するが、小型の場合
長い消音室を設けることができない。排気音は、
低周波音から高周波音まで発生するが、中・高周
波音は短い消音室で吸収できるが、低周波音は消
音室が短いと吸収できない。 In the case of a small engine such as a motorcycle, there is a limit to the volume of the muffler, and a long and large muffler cannot be used. Generally, a muffler is used by dividing the interior into several silencing chambers, but if the muffler is small, it is not possible to provide a long silencing chamber. The exhaust sound is
A range of low-frequency sounds to high-frequency sounds are generated, and while medium and high-frequency sounds can be absorbed by a short silencing chamber, low-frequency sounds cannot be absorbed if the silencing chamber is short.
この発明は、かかる点に鑑み、短いマフラでも
低周波音が吸収できるように改善したもので、以
下図面に示す本発明の実施例について説明する。 In view of this point, the present invention has been improved so that low frequency sound can be absorbed even with a short muffler.Embodiments of the present invention shown in the drawings will be described below.
第１図及び第２図に於て、筒状の外筒１内を隔
壁２で仕切つて、適宜長さの消音室３を構成す
る。そして、中央に各消音室３を連通させる内筒
４を設ける。而して本発明は、外筒１の内側一側
に、前端５が前室６に開口し、後端が隔壁２を貫
通して後方まで伸びる長い低周波吸収室７を設け
る。 In FIGS. 1 and 2, the inside of a cylindrical outer cylinder 1 is partitioned by a partition wall 2 to form a silencing chamber 3 having an appropriate length. Then, an inner cylinder 4 is provided in the center to communicate each of the silencing chambers 3. According to the present invention, a long low frequency absorption chamber 7 is provided on one side of the inner side of the outer cylinder 1, the front end 5 of which opens into the front chamber 6, and the rear end of which penetrates the partition wall 2 and extends to the rear.
作用について説明する。 The effect will be explained.
排気ガスは、左端から入り、各消音室３を通つ
て、内筒４の右端から放出される。そして、中・
高周波音は短い消音室３で吸収され、低周波音は
長い低周波吸収室７で吸収でき、全域に亘る消音
が可能となる。特に、短いマフラ内に於ても、長
い低周波吸収室７を設けることができて、低周波
音の吸収もできる。 Exhaust gas enters from the left end, passes through each muffling chamber 3, and is emitted from the right end of the inner cylinder 4. And inside...
High-frequency sound can be absorbed by the short silencing chamber 3, and low-frequency sound can be absorbed by the long low-frequency absorption chamber 7, making it possible to muffle the entire area. In particular, even in a short muffler, a long low frequency absorption chamber 7 can be provided, and low frequency sound can also be absorbed.
第３図は、本発明の他の実施例を示すもので、
後端に小室８を構成し、この小室８と低周波吸収
室７を貫孔９で連通させたもので、これによつ
て、小室８がダンパ室になり、一層低周波音の吸
収を計ることができる。 FIG. 3 shows another embodiment of the present invention,
A small chamber 8 is formed at the rear end, and this small chamber 8 and the low frequency absorption chamber 7 are communicated with each other through a through hole 9. As a result, the small chamber 8 becomes a damper chamber and further absorbs low frequency sound. be able to.
以上説明したように、この発明は、筒状の外筒
内を長さ方向に隔壁で数室の消音室に仕切ると共
に、外筒の内側一側に、前端が前室に開口し、後
端が隔壁を貫通して後方に伸びた長い低周波吸収
室を設けたもので、全長が短いマフラに於ても、
低周波吸収室が設けられ、低周波音が吸収できる
ようになつて、消音効果の向上を計ることができ
る。又、低周波吸収室の後端に小室を連結すれ
ば、小室がダンパ効果を発生し、一層低周波音の
吸収が計れる。こうして、マフラ長さを短くしな
がら、全域に亘る消音ができ、特に小型エンジン
のように、短いマフラしか装着できないような場
合、極めて有効である。 As explained above, the present invention partitions the inside of a cylindrical outer cylinder into several silencing chambers by partition walls in the length direction, and at the same time, the front end opens into the front chamber on one side inside the outer cylinder, and the rear end opens into the front chamber. The muffler has a long low-frequency absorption chamber that penetrates the bulkhead and extends rearward, so even in a muffler with a short overall length,
A low frequency absorption chamber is provided so that low frequency sounds can be absorbed, thereby improving the silencing effect. Furthermore, if a small chamber is connected to the rear end of the low frequency absorption chamber, the small chamber will generate a damper effect, and further absorption of low frequency sound can be achieved. In this way, it is possible to muffle the entire area while reducing the length of the muffler, which is extremely effective, especially when only a short muffler can be installed, such as in a small engine.
第１図は本発明の一実施例を示す縦断面図、第
２図は第１図Ａ−Ａ横断面図、第３図は本発明の
他の実施例を示す縦断面図である。
１……外筒、２……隔壁、３……消音室、５…
…前端、６……前室、７……低周波吸収室、８…
…小室。
FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a longitudinal cross-sectional view showing another embodiment of the present invention. 1... Outer tube, 2... Partition wall, 3... Sound deadening chamber, 5...
...front end, 6...front chamber, 7...low frequency absorption chamber, 8...
...small room.
Claims (1)
室に仕切ると共に、外筒の内側一側に、前端が前
室に開口し、後端が隔壁を貫通して後方に伸びた
長い低周波吸収室を設けたことを特徴とする内燃
機関のマフラ。 ２ 筒状の外筒内を長さ方向に隔壁で数室の消音
室に仕切ると共に、外筒の内側一側に、前端が前
室に開口し、後端が隔壁を貫通して後方に伸びた
長い低周波吸収室を設け、該低周波吸収室の後端
に小室を連結したことを特徴とする内燃機関のマ
フラ。[Claims] 1. The inside of the cylindrical outer cylinder is partitioned into several silencing chambers by partition walls in the length direction, and on one side of the inner side of the outer cylinder, the front end opens into the front chamber, and the rear end opens into the partition wall. A muffler for an internal combustion engine characterized by having a long low-frequency absorption chamber extending rearward through the muffler. 2 The inside of the cylindrical outer cylinder is partitioned into several sound-reducing chambers by partition walls in the length direction, and on one side of the inside of the outer cylinder, the front end opens into the front chamber, and the rear end extends rearward through the partition wall. 1. A muffler for an internal combustion engine, characterized in that a long low-frequency absorption chamber is provided, and a small chamber is connected to the rear end of the low-frequency absorption chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3197377A JPS53117143A (en) | 1977-03-23 | 1977-03-23 | Internal combustion muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3197377A JPS53117143A (en) | 1977-03-23 | 1977-03-23 | Internal combustion muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53117143A JPS53117143A (en) | 1978-10-13 |
| JPS6137443B2 true JPS6137443B2 (en) | 1986-08-23 |
Family
ID=12345882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3197377A Granted JPS53117143A (en) | 1977-03-23 | 1977-03-23 | Internal combustion muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS53117143A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5441245Y2 (en) * | 1974-12-17 | 1979-12-03 | ||
| JPS5436197Y2 (en) * | 1975-04-05 | 1979-11-01 |
-
1977
- 1977-03-23 JP JP3197377A patent/JPS53117143A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53117143A (en) | 1978-10-13 |
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