JP2913804B2 - Engine muffler - Google Patents
Engine mufflerInfo
- Publication number
- JP2913804B2 JP2913804B2 JP24006390A JP24006390A JP2913804B2 JP 2913804 B2 JP2913804 B2 JP 2913804B2 JP 24006390 A JP24006390 A JP 24006390A JP 24006390 A JP24006390 A JP 24006390A JP 2913804 B2 JP2913804 B2 JP 2913804B2
- Authority
- JP
- Japan
- Prior art keywords
- muffler
- outlet pipe
- cylinder
- chamber
- plate
- 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 - Lifetime
Links
Landscapes
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、自動二輪車などに搭載するエンジン用マ
フラに関する。Description: TECHNICAL FIELD The present invention relates to a muffler for an engine mounted on a motorcycle or the like.
（従来の技術） 自動二輪車などに搭載するエンジンは、エンジンの排
気孔に連結した排気管の後端にマフラを連結し、マフラ
で排気ガスを消音して放出するようにしている。マフラ
には、第７図に示すように、膨脹型（イ）、共鳴型
（ロ）、反転型（ハ）、の基本型がり、これらを組合せ
て構成する。膨脹型は低周波数を減衰するには長く大き
いものが必要であり、端管から排気ガスを出すもので
は、背圧の上昇を防ぐため筒壁から離す必要があり、端
管を長くする必要がある。又、反転型では端管を長くで
きるが内部に排気ガス澱みができ易い。又、背圧が上昇
しないようにするには、入口及び出口の端管のオフセッ
トを大きくしたいが、筒壁からの距離が小さくなり、端
管に吸音材などを取付けるのがむつかしい。又、反転型
では、他の連通パイプを通すと容積が小さくなる不都合
がある。これらを性能的に満足させるには、大きいマフ
ラ容積が必要になる。(Prior Art) In an engine mounted on a motorcycle or the like, a muffler is connected to a rear end of an exhaust pipe connected to an exhaust hole of the engine, and exhaust gas is exhausted by muffler. As shown in FIG. 7, the muffler has a basic type of an expansion type (a), a resonance type (b), and an inversion type (c). The expansion type requires a long and large one to attenuate low frequencies, and when exhaust gas is emitted from the end pipe, it must be separated from the cylinder wall to prevent a rise in back pressure, and the end pipe needs to be long. is there. Further, in the case of the reversing type, the end pipe can be lengthened, but exhaust gas stagnation tends to occur inside. Further, in order to prevent the back pressure from increasing, it is desired to increase the offset of the inlet and outlet end pipes, but the distance from the cylinder wall is reduced, and it is difficult to attach a sound absorbing material or the like to the end pipes. In addition, in the case of the reversing type, there is a disadvantage that the volume is reduced when another communication pipe is passed. To satisfy these performances, a large muffler volume is required.
（発明が解決しようとする課題） 消音効果が高いマフラを得ようとすると、容積が大き
く、長さの長いマフラになる。しかしながら、自動二輪
車などでは、車体のレイアウト上から、マフラの容積及
び長が制約を受け、大きくできない。一方、消音性能
は、増々良いものが求められ、背圧も小さいものが求め
られる。(Problems to be Solved by the Invention) In order to obtain a muffler having a high noise reduction effect, a muffler having a large volume and a long length is obtained. However, in a motorcycle or the like, the volume and length of the muffler are restricted due to the layout of the vehicle body, and the size cannot be increased. On the other hand, noise reduction performance is required to be more and more good and back pressure is also small.
この発明は、かかる点に鑑み、小さい容積と短い長さ
のマフラで、消音効果が高く、背圧も少くて出力ロスが
少いエンジン用マフラを得ることを目的とする。In view of the foregoing, an object of the present invention is to provide a muffler for an engine that has a small volume and a short length, has a high noise reduction effect, has a small back pressure, and has a small output loss.
（課題を解決するための手段） 上記課題を解決するために、この発明のエンジン用マ
フラは、マフラ筒内を前端を塞いだ連結筒と仕切板で前
後に第一消音室と第二消音室に区分し、マフラ筒の後端
から第二消音室内に挿入したアウトレットパイプの前部
を同芯で大径の連結筒の後部に挿入し、アウトレットパ
イプの前端を栓板で塞ぐと共に前部に横孔の複数の流出
口を設け、アウトレットパイプの外周に共鳴室を設ける
ようにしたことにある。(Means for Solving the Problems) In order to solve the above problems, the muffler for an engine according to the present invention includes a connecting cylinder having a front end closed in a muffler cylinder and a partition plate, and a first muffling chamber and a second muffling chamber. The front end of the outlet pipe inserted into the second muffler chamber from the rear end of the muffler cylinder is inserted concentrically into the rear of the large-diameter connection cylinder, and the front end of the outlet pipe is closed with a plug plate and The present invention is characterized in that a plurality of outlets of the horizontal hole are provided, and a resonance chamber is provided on the outer periphery of the outlet pipe.
（作用） アウトレットパイプは、前端を連結筒の後部内まで挿
入することによって、マフラの全長を長くしないで、長
いアウトレットパイプにでき、低周波の減衰をよくでき
る。又、アウトレットパイプには、外周に吸音材を入れ
た共鳴室を設けることができて、共鳴吸音ができる。こ
うして、二つの消音室の膨脹消音と長いアウトレットパ
イプ及びアウトレットパイプ外周の共鳴室で効果的に消
音でき、小型で短いマフラでも、消音性能がよいものに
できる （実施例） 以下、本発明の実施例を第１図乃至第６図によって説
明する。(Operation) By inserting the front end of the outlet pipe into the rear part of the connecting cylinder, the outlet pipe can be made a long outlet pipe without increasing the overall length of the muffler, and low frequency attenuation can be improved. Further, the outlet pipe can be provided with a resonance chamber containing a sound absorbing material on the outer periphery, so that resonance sound can be absorbed. In this way, sound can be effectively silenced by the expansion silencing of the two silencing chambers, the long outlet pipe and the resonance chamber around the outlet pipe, and the silencing performance can be improved even with a small and short muffler. An example will be described with reference to FIGS.
マフラ筒１は、外筒２の前後に端板３を連結し、外筒
２の内側に間隙を設けて内筒４を設けてあって、排気ガ
スの圧力波で内筒４を衝撃する音が外部に放射するのを
少くしている。マフラ筒１の中央部分には、連結筒５を
保持板６と仕切板７で取付ける。保持板６は、外周部分
に大きい通気窓８が設けてあり、中央部分は、連結筒５
の前端を塞いでいる。こうして、マフラ筒１内を連結筒
５と仕切板７で、前後に第一消音室９と第二消音室10に
区分してある。保持板６の前後には、多数の小孔を設け
たパンチング板11を設け、排気ガスの拡散を促進させる
ようにしてある。マフラ筒１の前端には、インレットパ
イプ12を挿入し、後端を連結筒５の前側のパンチング板
11に近づけて深く挿入してある。インレットパイプ12の
後端は、栓板13で塞ぎ、後端外周にスリット状の横孔の
流入口14が複数設けてある。連結筒５は、前部に複数の
横孔の通気孔15を設け、後部に多数の小孔を設けたパン
チング板16を挿入してある。第二消音室10内には、端板
３と保持板17で支えてアウトレットパイプ18が設けてあ
り、保持板17には、第二消音室10内の排気ガス流れを阻
害しないように大きい通気窓19が設けてある。アウトレ
ットパイプ18の前端は、同芯で大径の連結筒５の後部内
まで伸してある。そして、アウトレットパイプ18は、前
端を栓板20で塞ぎ、前部に複数の横孔の流出口21を設け
る。又、アウトレットパイプ18は多数の小孔22を穿設
し、外周にグラスウールなどの吸音材23を入れた共鳴室
24を設けてある。The muffler cylinder 1 has an end plate 3 connected to the front and rear of an outer cylinder 2 and an inner cylinder 4 with a gap provided inside the outer cylinder 2. Reduce radiation to the outside. At the center of the muffler cylinder 1, a connecting cylinder 5 is attached with a holding plate 6 and a partition plate 7. The holding plate 6 is provided with a large ventilation window 8 in the outer peripheral portion, and the connecting portion 5 is provided in the central portion.
Is blocking the front end. In this manner, the inside of the muffler cylinder 1 is divided into a first muffling chamber 9 and a second muffling chamber 10 at the front and rear by the connecting cylinder 5 and the partition plate 7. A punching plate 11 provided with a number of small holes is provided before and after the holding plate 6 to promote diffusion of exhaust gas. An inlet pipe 12 is inserted into the front end of the muffler tube 1, and the rear end is a punching plate on the front side of the connecting tube 5.
It is inserted deeply close to 11. The rear end of the inlet pipe 12 is closed with a plug plate 13, and a plurality of slit-shaped inflow holes 14 are provided on the outer periphery of the rear end. The connecting tube 5 has a plurality of lateral holes 15 formed at the front and a punching plate 16 having a large number of small holes inserted at the rear. An outlet pipe 18 is provided in the second muffling chamber 10 and supported by the end plate 3 and the holding plate 17. The holding plate 17 has a large ventilation so as not to obstruct the flow of exhaust gas in the second muffling room 10. A window 19 is provided. The front end of the outlet pipe 18 extends into the rear part of the concentric, large-diameter connecting cylinder 5. The outlet pipe 18 has a front end covered with a plug plate 20 and a plurality of lateral holes 21 at the front. The outlet pipe 18 has a number of small holes 22 and a resonance chamber in which a sound absorbing material 23 such as glass wool is placed on the outer periphery.
24 are provided.
排気ガスは、インレットパイプ12の後端の流入口14か
ら周方向に放出されて、第一消音室９内に入り、膨脹し
て消音しながら後方に流れ、パンチング板11の小孔を通
って拡散する。そして、連結筒５の前部の通気孔15を通
って連結筒５内に流れ、パンチング板16で更に拡散し、
第二消音室10内に流入して、膨脹消音する。更に、アウ
トレットパイプ18の前部の流出口21からアウトレットパ
イプ18内に流れ、共鳴室24で共鳴吸音されて、アウトレ
ットパイプ18の後端から放出される。Exhaust gas is discharged in the circumferential direction from the inlet 14 at the rear end of the inlet pipe 12, enters the first sound deadening chamber 9, flows backward while expanding and silencing, and passes through the small holes of the punching plate 11. Spread. Then, it flows into the connecting cylinder 5 through the ventilation hole 15 at the front part of the connecting cylinder 5, and is further diffused by the punching plate 16,
It flows into the second silencing chamber 10 and expands and silences. Further, it flows into the outlet pipe 18 from the outlet 21 at the front of the outlet pipe 18, is subjected to resonance sound absorption in the resonance chamber 24, and is discharged from the rear end of the outlet pipe 18.
本発明のエンジン用マフラによれば、アウトレットパ
イプは、連結筒の後部に挿入するので、マフラ筒の全長
が短くても長いアウトレットパイプにでき、低周波の減
衰をよくできる。又、アウトレットパイプは、マフラ筒
の中心部に配置でき、外周に共鳴室を設けることができ
て、共鳴吸音できる。こうして、長さの短い小容積のマ
フラで、消音効果を上げ、背圧も少くて出力ロスの少い
ものにできる。According to the muffler for an engine of the present invention, since the outlet pipe is inserted into the rear part of the connecting cylinder, the outlet pipe can be made long even if the overall length of the muffler cylinder is short, and low frequency attenuation can be improved. Further, the outlet pipe can be arranged at the center of the muffler cylinder, and a resonance chamber can be provided on the outer periphery, so that resonance sound can be absorbed. In this way, a muffler having a small volume and a short length can enhance the silencing effect, reduce back pressure and reduce output loss.
第１図乃至第６図は本発明の一実施例を示し、 第１図は縦断面図、 第２図は外観側面図、 第３図は第１図Ａ−Ａ矢視断面図、 第４図は第１図Ｂ−Ｂ矢視断面図、 第５図は第１図Ｃ−Ｃ矢視断面図、 第６図は第１図Ｄ−Ｄ矢視断面図、 第７図は三種のマフラの基本型を示す縦断略図、 である。 １……マフラ筒、５……連結筒、７……仕切板、９……
第一消音室、10……第二消音室、18……アウトレットパ
イプ、20……栓板、21……流入口、24……共鳴室。1 to 6 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is an external side view, FIG. 3 is a sectional view taken along the line AA of FIG. Fig. 1 is a cross-sectional view as viewed in the direction of arrows BB in Fig. 1, Fig. 5 is a cross-sectional view in the direction of arrows CC in Fig. 1, Fig. 6 is a cross-sectional view as viewed in the direction of arrows DD in Fig. 1, and Fig. 7 is three types of mufflers. FIG. 1 ... Muffler cylinder, 5 ... Connection cylinder, 7 ... Partition plate, 9 ...
1st silencer room, 10 ... second silencer room, 18 ... outlet pipe, 20 ... plug plate, 21 ... inlet, 24 ... resonance room.
Claims (1)
で前後に第一消音室と第二消音室に区分し、マフラ筒の
後端から第二消音室内に挿入したアウトレットパイプの
前部を同芯で大径の連結筒の後部に挿入し、アウトレッ
トパイプの前端を栓板で塞ぐと共に前部に横孔の複数の
流出口を設け、アウトレットパイプの外周に共鳴室を設
けるようにしたことを特徴とするエンジン用マフラ。An outlet pipe inserted into a second muffler chamber from a rear end of a muffler cylinder is divided into a first muffler chamber and a second muffler chamber by a connecting cylinder and a partition plate which cover a front end of the muffler cylinder. Insert the front part concentrically into the rear part of the large-diameter connection cylinder, close the front end of the outlet pipe with a plug plate, provide a plurality of outlets with horizontal holes in the front part, and provide a resonance chamber on the outer circumference of the outlet pipe. A muffler for an engine, characterized in that:
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24006390A JP2913804B2 (en) | 1990-09-12 | 1990-09-12 | Engine muffler |
| US07/756,597 US5227593A (en) | 1990-09-12 | 1991-09-09 | Muffler assembly for engine |
| EP91115404A EP0475398B1 (en) | 1990-09-12 | 1991-09-11 | Muffler assembly for engine |
| AT91115404T ATE115682T1 (en) | 1990-09-12 | 1991-09-11 | SILENCER FOR ENGINES. |
| DE69105882T DE69105882T2 (en) | 1990-09-12 | 1991-09-11 | Silencers for engines. |
| ES91115404T ES2064847T3 (en) | 1990-09-12 | 1991-09-11 | EXHAUST SILENCER FOR ENGINES. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24006390A JP2913804B2 (en) | 1990-09-12 | 1990-09-12 | Engine muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04121408A JPH04121408A (en) | 1992-04-22 |
| JP2913804B2 true JP2913804B2 (en) | 1999-06-28 |
Family
ID=17053935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24006390A Expired - Lifetime JP2913804B2 (en) | 1990-09-12 | 1990-09-12 | Engine muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2913804B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ2006203A3 (en) * | 2006-03-28 | 2007-05-02 | Mikes@Eduard | Exhaust gas noise silencer intended particularly for motor vehicles |
| JP2007297986A (en) * | 2006-05-01 | 2007-11-15 | Yamaha Motor Co Ltd | Exhaust system and vehicle equipped with the exhaust system |
-
1990
- 1990-09-12 JP JP24006390A patent/JP2913804B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04121408A (en) | 1992-04-22 |
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