JPH0291410A - Control-type muffler - Google Patents
Control-type mufflerInfo
- Publication number
- JPH0291410A JPH0291410A JP24254188A JP24254188A JPH0291410A JP H0291410 A JPH0291410 A JP H0291410A JP 24254188 A JP24254188 A JP 24254188A JP 24254188 A JP24254188 A JP 24254188A JP H0291410 A JPH0291410 A JP H0291410A
- Authority
- JP
- Japan
- Prior art keywords
- shell
- exhaust pipe
- exhaust
- muffler
- small
- 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.)
- Pending
Links
- 239000011358 absorbing material Substances 0.000 claims abstract description 6
- 230000003584 silencer Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000030279 gene silencing Effects 0.000 description 2
- 230000001743 silencing effect Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、主として自動車用内燃機関において、低回
転域から高回転域にわたって有効に作用する制御型消音
器に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a controlled muffler that operates effectively from a low rotation range to a high rotation range, mainly in an internal combustion engine for an automobile.
（従来の技術）
従来の消音器としては、例えば実開昭５５−４３５７号
公報に開示されるものがある。第６図はその一部を示す
もので、図中１は多数の小孔２を配設した排気管で、こ
の排気管１はフロントエンドプレート３ａとリアエンド
プレート３ｂでふさがれたシェル３を貫通している。(Prior Art) As a conventional muffler, there is one disclosed in, for example, Japanese Utility Model Application Publication No. 55-4357. Figure 6 shows a part of it. In the figure, 1 is an exhaust pipe with many small holes 2, and this exhaust pipe 1 passes through a shell 3 that is blocked by a front end plate 3a and a rear end plate 3b. are doing.
（発明が解決しようとする課題）
しかしながら、このような従来の消音器にあっては、例
えばエンジン回転数が低回転域にある時も、高回転域に
ある場合でも拡張効果のみの消音構造となっていたため
、中、高速域での消音効果が少なく、さらに中、高速域
での排圧上昇にともなう出力低下が生じるという問題点
があった。(Problem to be Solved by the Invention) However, in such conventional silencers, the silencing structure only has an expansion effect, for example, even when the engine speed is in the low speed range or in the high speed range. As a result, there was a problem in that the noise reduction effect in the medium and high speed ranges was small, and the output decreased as the exhaust pressure increased in the medium and high speed ranges.
（課題を解決するための手段）
上述の問題点を解決するため本発明においては、両端を
エンドプレートでふさいだ外筒よりなるシェルに、多数
の小孔を配設した排気管を貫通させてなる消音器におい
て、前記排気管を前記シェルに入る前に複数本に分岐す
ることにより、多数の小孔を配設した複数本の排気管を
シェルに貫通して設けると共に、前記シェル内の各排気
管には吸音材を中に充填した小消音器を設け、これら複
数本の排気管のうち少なくとも１本は前記小消音器より
出た部分に、他の少なくとも１本は前記小消音器へ入る
手前部分にエンジン運転状態により開閉する制御バルブ
をそれぞれ設けて制御型消音器を構成する。(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, an exhaust pipe having a large number of small holes is passed through a shell made of an outer cylinder whose both ends are closed with end plates. In this muffler, the exhaust pipe is branched into a plurality of pipes before entering the shell, thereby providing a plurality of exhaust pipes with a large number of small holes penetrating the shell, and each pipe inside the shell The exhaust pipe is provided with a small muffler filled with sound-absorbing material, at least one of the plurality of exhaust pipes exits from the small muffler, and at least one other goes to the small muffler. Control valves that open and close depending on the engine operating conditions are provided in the front portion of the engine to form a controlled silencer.
（作 用）
本発明は上述のように構成したから、消音器のシェルの
前後にある制御バルブをエンジン運転状態、例えばエン
ジン回転数に関連して開閉することにより、低回転、中
回転、高回転の各場合に要求される消音効果を有効に得
ることができる。(Function) Since the present invention is configured as described above, by opening and closing the control valves located before and after the shell of the silencer in relation to the engine operating condition, for example, the engine speed, low rotation, medium rotation, and high rotation speed can be controlled. The noise reduction effect required for each rotation can be effectively obtained.
（実施例） 以下、第１図について本発明の一実施例を説明する。(Example) An embodiment of the present invention will be described below with reference to FIG.
まず構成を説明すると、フロントエンドプレート４ａと
リアエンドプレート４ｂでふさがれたシェル４を形成し
、１本の排気管５をシェル４に入る前に２本の排気管６
．７に分岐し、この分岐した２本の排気管６，７をシェ
ル４にそれぞれ貫通させると共に、シェル４内の各排気
管６，７にそれぞれ多数の小孔８を配設し、さらに吸音
材９を充填した小消音器１０を前記排気管６，７の小孔
８を部分的に覆うように設ける。First, to explain the configuration, a front end plate 4a and a rear end plate 4b form a closed shell 4, and one exhaust pipe 5 is connected to two exhaust pipes 6 before entering the shell 4.
．． The two branched exhaust pipes 6 and 7 are made to penetrate through the shell 4, and each of the exhaust pipes 6 and 7 in the shell 4 is provided with a large number of small holes 8. A small muffler 10 filled with a muffler 9 is provided so as to partially cover the small holes 8 of the exhaust pipes 6 and 7.
すなわち排気管６では、出口側の略半分の小孔８を覆う
ように小消音器１０を設け、また排気管７では、入口側
の略半分の小孔８を覆うように小消音器１０を設ける。That is, in the exhaust pipe 6, a small muffler 10 is provided to cover approximately half of the small holes 8 on the exit side, and in the exhaust pipe 7, a small muffler 10 is provided to cover approximately half of the small holes 8 on the inlet side. establish.
また一方の排気管６にはシェル４から出た部分に、他方
の排気管７にはシェル４に入る手前部分に、エンジン回
転数により開閉する制御バルブ１１ａ。Further, one exhaust pipe 6 has a control valve 11a at a portion exiting from the shell 4, and the other exhaust pipe 7 at a portion before entering the shell 4, which opens and closes depending on the engine speed.
１１ｂを設ける。すなわちｌｌａは排気管６に設けた制
御バルブで、ｌｌｂは排気管７に設けた制御バルブであ
る。11b is provided. That is, lla is a control valve provided in the exhaust pipe 6, and llb is a control valve provided in the exhaust pipe 7.
次に上述のように構成した本発明消音器の作用を説明す
る。Next, the operation of the silencer of the present invention constructed as described above will be explained.
第２図〜第５図は２つの制御バルブｌｌａ、 Ｉｌｂを
それぞれ開閉した場合の各組み合わせによるガスの流れ
を示すものである。FIGS. 2 to 5 show the gas flow in each combination when the two control valves lla and Ilb are opened and closed, respectively.
すなわち第２図は２つの制御バルブｌｌａ、 ｌｌｂが
共に閉じられている場合で、この状態はエンジンの低回
転時に使用する。That is, FIG. 2 shows a case where both control valves lla and llb are closed, and this state is used when the engine rotates at low speeds.
この場合、最初排気管６にしか流れないガスは小孔８を
通じ拡張され、つぎに排気管７の後半部の小孔８に入る
ことにより縮流され、最後に排気管７から排出される。In this case, the gas that initially flows only into the exhaust pipe 6 is expanded through the small hole 8, then enters the small hole 8 in the rear half of the exhaust pipe 7 to be contracted, and finally is discharged from the exhaust pipe 7.
この場合、消音器のシェル４の中では完全な拡張効果が
引き出されるから、低回転時に特に要求されるこもり音
の除去に効果がある。In this case, the full expansion effect is brought out in the shell 4 of the muffler, which is effective in eliminating muffled sounds, which is particularly required at low engine speeds.
第３図では２つのバルブｌｌａ、 ｌｌｂのうち、消音
器の出口にある排気管６に設けたバルブｌｌａのみが閉
じている。これはエンジンの中回転の低い方の回転時に
使用するもので、この時排気管６の小孔８と排気管７の
小孔８はそれぞれに拡張、縮流の流れを生じ、消音器と
してはこの回転域に要求されるこもり音の除去に効果が
出る。In FIG. 3, of the two valves lla and llb, only the valve lla provided in the exhaust pipe 6 at the outlet of the muffler is closed. This is used when the engine is running at mid-low speeds, and at this time, the small holes 8 of the exhaust pipe 6 and the small holes 8 of the exhaust pipe 7 produce expansion and contraction flows, respectively, and can be used as a muffler. It is effective in eliminating the muffled noise required in this rotation range.
さらに排気管７に設けられた小消音器１ｏの吸音材９に
よる効果によって、この回転域の高周波成分を減衰させ
ると共に、排気音色を向上させることができる。Further, due to the effect of the sound absorbing material 9 of the small muffler 1o provided in the exhaust pipe 7, high frequency components in this rotation range can be attenuated and the exhaust tone can be improved.
第４図は２つのバルブｌｌａ、 ｌｌｂのうち、消音器
入口側にある排気管７の中のバルブｌｌｂのみが閉じて
いる。これはエンジンの中回転の高い方の回転時に使用
するもので、この時は第３図の場合と同等の消音効果を
得ることができることに加えて、さらに、消音器のシェ
ル４から出ている排気管６゜７の２本共にガスが流れる
ために、低排圧化（マフラ損失の低減）に効果がある。In FIG. 4, of the two valves lla and llb, only the valve llb in the exhaust pipe 7 on the muffler inlet side is closed. This is used when the engine is running at medium to high speeds, and in this case, in addition to being able to obtain the same silencing effect as in the case shown in Figure 3, there is also a Since gas flows through both exhaust pipes 6.7, it is effective in lowering the exhaust pressure (reducing muffler loss).
第５図は２つのバルブｌｌａ、 ｌｌｂを共に開いた場
合であり、エンジンの高回転時に使用するものである。FIG. 5 shows a case where both valves lla and llb are open, which is used when the engine rotates at high speed.
この場合、消音器のシェル４内における拡張と縮流の効
果による消音性能は変わることなく発揮でき、さらに、
エンジンの中回転域では高周波成分を減衰させる吸音機
構が前述した各状態では１本の排気管のみが作用するだ
けであったものが、この場合は、２本の排気管６．７が
共にその吸音機構が作用するから、排気音色を一層向上
させることができる。In this case, the silencing performance due to the effect of expansion and contraction within the shell 4 of the silencer remains unchanged, and furthermore,
The sound absorption mechanism that attenuates high-frequency components in the engine's mid-speed range operates only on one exhaust pipe in each of the states described above, but in this case, both exhaust pipes 6 and 7 act on it. Since the sound absorption mechanism works, the exhaust tone can be further improved.
さらに以上のことに加えてエンジンの高回転時に特に要
求される排気系の低徘圧化（マフラ損失の低減）を、デ
ュアルチューブ機構により達成することができる。Furthermore, in addition to the above, the dual tube mechanism can achieve low wandering pressure in the exhaust system (reduction of muffler loss), which is particularly required when the engine rotates at high speeds.
以上の作用をまとめると次表のようになる。The above effects are summarized in the following table.
−・・・従来と同等
Ｏ・・・従来より向上
◎・・・従来より大幅向上
（発明の効果）
以上説明してきたように、
その構成を消音器のシェル４
を配設すると共に、吸音材９
この発明によれば、
の中を多数の小孔８
を充填した小消音器
１０によって部分的に覆った２本の排気管６．・７を貫
通させ、その内の１本の排気管６にはシェル４より出た
部分に、他の１本の排気管７にはシェル４へ入る手前部
分に、エンジン運転状態により開閉する制御バルブｌｌ
ａ、 ｌｌｂを設けた構造としたため、エンジンの各運
転状態に応じてそれぞれ適切な消音効果を有効に発揮す
ることができるという効果が得られる。-...Same as the conventional O...Improved compared to the conventional ◎...Significantly improved compared to the conventional (effect of the invention) As explained above, the structure is constructed by disposing the shell 4 of the silencer and using sound absorbing material. 9. According to the invention, two exhaust pipes 6. 7, one of the exhaust pipes 6 has a part that exits from the shell 4, and the other exhaust pipe 7 has a control part that opens and closes depending on the engine operating condition. valve ll
Since the structure is provided with a and llb, it is possible to effectively exert an appropriate silencing effect depending on each operating state of the engine.
第１図は本発明の制御型消音器の断面図、第２図〜第５
図は本発明の制御型消音器の制御パルプをそれぞれ開閉
制御した各場合における作用説明図、
第６図は従来の消音器の一例を示す断面図である。
４・・・シェル ５，６．７・・・排気管
８・・・小孔 ９・・・吸音材１０・・
・小消音器
１１ａ、 ｌｌｂ・・・制御バルブFIG. 1 is a sectional view of the controlled silencer of the present invention, and FIGS.
The figure is an explanatory view of the operation in each case where the control pulp of the control type muffler of the present invention is controlled to open and close, respectively. Fig. 6 is a sectional view showing an example of a conventional muffler. 4...Shell 5,6.7...Exhaust pipe 8...Small hole 9...Sound absorbing material 10...
・Small silencer 11a, llb...control valve
Claims (1)
ルに、多数の小孔を配設した排気管を貫通させてなる消
音器において、前記排気管を前記シェルに入る前に複数
本に分岐することにより多数の小孔を配設した複数本の
排気管をシェルに貫通して設けると共に、前記シェル内
の各排気管には吸音材を中に充填した小消音器を設け、
これら複数本の排気管のうち少なくとも１本は前記小消
音器より出た部分に、他の少なくとも１本は前記小消音
器へ入る手前部分に、エンジン運転状態により開閉する
制御バルブをそれぞれ設けたことを特徴とする制御型消
音器。1. In a silencer in which an exhaust pipe with a large number of small holes is passed through a shell made of an outer cylinder whose both ends are closed with end plates, the exhaust pipe is branched into a plurality of pipes before entering the shell. Accordingly, a plurality of exhaust pipes each having a large number of small holes are provided through the shell, and each exhaust pipe in the shell is provided with a small muffler filled with a sound absorbing material,
At least one of the plurality of exhaust pipes is provided with a control valve at a portion exiting from the small muffler, and at least one other at a portion before entering the small muffler, each of which opens and closes depending on the engine operating state. A controlled silencer characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24254188A JPH0291410A (en) | 1988-09-29 | 1988-09-29 | Control-type muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24254188A JPH0291410A (en) | 1988-09-29 | 1988-09-29 | Control-type muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0291410A true JPH0291410A (en) | 1990-03-30 |
Family
ID=17090643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24254188A Pending JPH0291410A (en) | 1988-09-29 | 1988-09-29 | Control-type muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0291410A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06280542A (en) * | 1993-02-25 | 1994-10-04 | Apex:Kk | Muffler for internal combustion engine |
| US6598390B2 (en) * | 2001-12-26 | 2003-07-29 | Liang Fei Industry Co. Ltd. | Easily controlled exhaust pipe |
| US6662554B2 (en) * | 2002-01-23 | 2003-12-16 | Deere & Company | Adjustable restriction muffler system for a combine |
| CN106089386A (en) * | 2016-06-30 | 2016-11-09 | 娄土岭 | A kind of Novel automobile exhaust pipe |
| CN107489507A (en) * | 2016-12-26 | 2017-12-19 | 宝沃汽车（中国）有限公司 | The gas extraction system and automobile of automobile |
| CN113374568A (en) * | 2021-07-19 | 2021-09-10 | 无锡威孚力达催化净化器有限责任公司 | Air inlet connecting structure of rear-stage silencer |
-
1988
- 1988-09-29 JP JP24254188A patent/JPH0291410A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06280542A (en) * | 1993-02-25 | 1994-10-04 | Apex:Kk | Muffler for internal combustion engine |
| JP2583182B2 (en) * | 1993-02-25 | 1997-02-19 | 株式会社アペックス | Muffler for internal combustion engine |
| US6598390B2 (en) * | 2001-12-26 | 2003-07-29 | Liang Fei Industry Co. Ltd. | Easily controlled exhaust pipe |
| US6662554B2 (en) * | 2002-01-23 | 2003-12-16 | Deere & Company | Adjustable restriction muffler system for a combine |
| CN106089386A (en) * | 2016-06-30 | 2016-11-09 | 娄土岭 | A kind of Novel automobile exhaust pipe |
| CN107489507A (en) * | 2016-12-26 | 2017-12-19 | 宝沃汽车（中国）有限公司 | The gas extraction system and automobile of automobile |
| CN113374568A (en) * | 2021-07-19 | 2021-09-10 | 无锡威孚力达催化净化器有限责任公司 | Air inlet connecting structure of rear-stage silencer |
| CN113374568B (en) * | 2021-07-19 | 2024-03-26 | 无锡威孚力达催化净化器有限责任公司 | Air inlet connection structure of rear-stage muffler |
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