JP2000002112A - Valve for exhaust pipe in engine muffler - Google Patents
Valve for exhaust pipe in engine mufflerInfo
- Publication number
- JP2000002112A JP2000002112A JP16787798A JP16787798A JP2000002112A JP 2000002112 A JP2000002112 A JP 2000002112A JP 16787798 A JP16787798 A JP 16787798A JP 16787798 A JP16787798 A JP 16787798A JP 2000002112 A JP2000002112 A JP 2000002112A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- exhaust pipe
- valve body
- exhaust
- holder
- 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.)
- Granted
Links
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はエンジンのマフラに
おける排気管の開閉に使用する排気管用バルブに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe valve used for opening and closing an exhaust pipe in a muffler of an engine.
【０００２】[0002]
【従来の技術】従来、エンジンのマフラにおいて、図９
に示すように、排気入口管１０１から流入した排気ガス
をマフラ内の消音室を通過させた後、２本の排気出口管
１０２，１０３から排出するようにするとともにその一
方の排気出口管１０３に排気ガス流量に応じて開閉する
バルブ１０４を設け、排気ガス流量の少ないときはバル
ブ１０４を閉状態として１本の排気出口管１０２のみか
ら排気ガスを排出することにより消音性能を向上させ、
また、排気ガス流量が多いときはバルブ１０４を開状態
として２本の排気出口管１０２，１０３から排気ガスを
排出することにより気流音を抑制するとともに排気損失
を小さくするものが例えば特開平７−３１０５２１号公
報に開示されている。2. Description of the Related Art Conventionally, in engine mufflers, FIG.
As shown in the figure, after the exhaust gas flowing from the exhaust inlet pipe 101 is passed through the muffler chamber in the muffler, the exhaust gas is discharged from the two exhaust outlet pipes 102 and 103, and one of the exhaust outlet pipes 103 is connected to the exhaust outlet pipe 103. A valve 104 that opens and closes according to the exhaust gas flow rate is provided, and when the exhaust gas flow rate is low, the valve 104 is closed to exhaust the exhaust gas from only one exhaust outlet pipe 102, thereby improving the noise reduction performance.
When the exhaust gas flow rate is large, the valve 104 is opened to exhaust the exhaust gas from the two exhaust outlet pipes 102 and 103, thereby suppressing the airflow noise and reducing the exhaust loss. It is disclosed in Japanese Patent Publication No. 310521.
【０００３】また、上記従来の技術におけるバルブ１０
４は、バタフライ型バルブを使用し、これを一方の排気
管１０３内で回動可能に備えて構成している。[0003] Further, the valve 10 in the above-mentioned prior art is used.
Reference numeral 4 denotes a butterfly type valve which is rotatably provided in one exhaust pipe 103.
【０００４】[0004]
【発明が解決しようとする課題】上記従来のようにバタ
フライ型のバルブ１０４においては、バルブ１０４の閉
状態時に、そのバルブ外周面と排気出口管内周面との間
の隙間が生じないように気密構造にすると、バルブ１０
４が排気出口管１０３に食い込み状態に干渉し、作動不
良を招く。そのため、排気出口管１０３の内周面とバル
ブ１０４の外周面との間に隙間を設ける必要があるが、
このような隙間を設けると、この隙間から排気ガスが漏
洩し、排気ガスの小流量時の消音性能が十分得られない
という問題がある。また、上記の隙間を、気密性が高く
かつ干渉しないようにするためには、非常に高い部品精
度が要求され、それに伴うコストアップや生産性等に問
題を生じるおそれがある。In the butterfly type valve 104 as described above, when the valve 104 is in a closed state, the valve 104 is airtight so that no gap is formed between the outer peripheral surface of the valve and the inner peripheral surface of the exhaust pipe. In the structure, the valve 10
4 interferes with the state of biting into the exhaust outlet pipe 103, resulting in malfunction. Therefore, it is necessary to provide a gap between the inner peripheral surface of the exhaust outlet pipe 103 and the outer peripheral surface of the valve 104,
If such a gap is provided, there is a problem that exhaust gas leaks from this gap, and sufficient noise reduction performance cannot be obtained when the flow rate of the exhaust gas is small. In addition, in order to prevent the gap from having high airtightness and preventing interference, extremely high component accuracy is required, which may cause problems in cost increase, productivity, and the like.
【０００５】そこで本発明は、上記各問題点を解決する
エンジンマフラにおける排気管用バルブを提供すること
を目的とするものである。Accordingly, an object of the present invention is to provide an exhaust pipe valve for an engine muffler which solves the above problems.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めに、請求項１記載の第１の発明は、排気管の上流側に
バルブホルダを気密に設け、該バルブホルダの前壁に流
入口を形成し、バルブホルダにバルブ体を、上記流入口
の下流側に当接したり離間するように開閉可能に付設
し、更に、該バルブ体を閉方向に付勢する付勢手段を設
けたことを特徴とするものである。According to a first aspect of the present invention, in order to solve the above-mentioned problems, a valve holder is provided in a gas-tight manner upstream of an exhaust pipe, and a valve holder is provided on a front wall of the valve holder. An inlet is formed, and a valve body is provided in the valve holder so as to be openable and closable so as to contact or separate from the downstream side of the inflow port, and further, an urging means for urging the valve body in a closing direction is provided. It is characterized by the following.
【０００７】本発明においては、前壁を下流方向へ筒状
に延設した流入口の端部にバルブ体を当接させるように
したので、バルブ体を、その外周がバルブホルダに非接
触状態で開閉させることができ、開閉動作不良を起こす
おそれがない。そのため、簡易な構造で閉弁状態の気密
性を得ることができる。In the present invention, the valve body is brought into contact with the end of the inflow port where the front wall is formed in a cylindrical shape in the downstream direction, so that the outer periphery of the valve body is not in contact with the valve holder. Can be opened and closed, and there is no danger of opening and closing operation failure. Therefore, airtightness in the valve-closed state can be obtained with a simple structure.
【０００８】請求項２記載の第２の発明は、上記第１の
発明において、前記流入口の上流端部を、上流方向が拡
開するフレア状に形成したことを特徴とするものであ
る。本発明においては、更に、開弁時における排気管へ
の排気ガスの流入がスムースになり、気流音の発生を抑
制できる。According to a second aspect of the present invention, in the first aspect, the upstream end of the inflow port is formed in a flare shape that expands in the upstream direction. In the present invention, the flow of the exhaust gas into the exhaust pipe at the time of opening the valve is smooth, and the generation of the airflow noise can be suppressed.
【０００９】請求項３記載の第３の発明は、上記第１又
は第２の発明において、前記バルブ体の外周とバルブホ
ルダまたは排気管との距離を、バルブ体の回転中心と反
対の位置において最も大きく設定したことを特徴とする
ものである。According to a third aspect of the present invention, in the first or second aspect, a distance between an outer periphery of the valve body and a valve holder or an exhaust pipe is set at a position opposite to a rotation center of the valve body. It is characterized by being set to the largest value.
【００１０】本発明においては、バルブ体が微少に開い
たとき、そのバルブ体の回転中心と反対側の開口量が最
も多くなり、該部での排気流が多くなる。この場合、該
部でのバルブ体外周とこれと対向するバルブホルダまた
は排気管との距離が近いと排気ガス流がバルブホルダに
当たって気流音を発生するが、本発明によれば、上記の
距離が長くなり、上記の現象を防止する。In the present invention, when the valve body is slightly opened, the opening amount on the side opposite to the rotation center of the valve body becomes the largest, and the exhaust flow at this portion increases. In this case, if the distance between the outer periphery of the valve body at the portion and the valve holder or the exhaust pipe facing the valve body is short, the exhaust gas flow hits the valve holder and generates airflow noise. Lengthens to prevent the above phenomena.
【００１１】[0011]
【発明の実施の形態】図１乃至図８に示す実施例に基づ
いて本発明の実施の形態について説明する。図１乃至図
３は第１実施例を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the embodiments shown in FIGS. 1 to 3 show a first embodiment.
【００１２】図１は本発明をエンジンのマフラにおける
第１排気出口管に適用した例を示す。このマフラにおい
ては、エンジンから排出された排気ガスは、排気入口管
１を通ってマフラ内の第２室２に流入する。排気ガスは
更に連通管３を通り第１室４内に流入する。流通パイプ
としての第１排気出口管５の上流端には本発明の排気管
用バルブ６が設けられており、エンジンの回転数が低く
排気ガス量が少ないときには、そのバルブ体７が第１室
４の内圧に抗して付勢手段であるコイルスプリング８の
付勢力により第１排気出口管５の上流端口を閉塞する。
そのため、排気ガスは小径の第２排気出口管９に入り、
上記排気管用バルブ６より下流に連通した第１排気出口
管５を通じてマフラ外へ導出される。このとき、第２排
気出口管９は小径かつ長尺に形成されているため、十分
な消音効果を得ることができる。FIG. 1 shows an example in which the present invention is applied to a first exhaust outlet pipe in an engine muffler. In this muffler, exhaust gas discharged from the engine flows into a second chamber 2 in the muffler through an exhaust inlet pipe 1. The exhaust gas further flows into the first chamber 4 through the communication pipe 3. The exhaust pipe valve 6 of the present invention is provided at the upstream end of the first exhaust outlet pipe 5 as a flow pipe. When the engine speed is low and the amount of exhaust gas is small, the valve body 7 is moved to the first chamber 4. The upstream end of the first exhaust outlet pipe 5 is closed by the urging force of the coil spring 8 as urging means against the internal pressure of the first exhaust outlet pipe 5.
Therefore, the exhaust gas enters the small-diameter second exhaust outlet pipe 9,
It is led out of the muffler through a first exhaust outlet pipe 5 communicating downstream from the exhaust pipe valve 6. At this time, since the second exhaust outlet pipe 9 is formed to have a small diameter and a long length, a sufficient silencing effect can be obtained.
【００１３】エンジン回転数が高く排気ガス量が多くな
ると、第１室４の内圧が上昇して排気管用バルブ６のバ
ルブ体７がコイルスプリング８の付勢力に抗して開き、
第１排気出口管５のみを通ってマフラ外に導出される。
したがって、背圧が低減され、エンジン出力の向上が得
られる。When the engine speed is high and the amount of exhaust gas is large, the internal pressure of the first chamber 4 increases, and the valve body 7 of the exhaust pipe valve 6 opens against the urging force of the coil spring 8,
It is led out of the muffler only through the first exhaust outlet pipe 5.
Therefore, the back pressure is reduced and the engine output is improved.
【００１４】上記の排気管用バルブ６の構造を図２及び
図３により詳述する。上記排気入口管を形成する流通パ
イプ５は断面円形で、その上流部に拡径部５ａを形成
し、その上流端部５ｂは開口されている。The structure of the exhaust pipe valve 6 will be described in detail with reference to FIGS. The flow pipe 5 forming the exhaust inlet pipe has a circular cross section, and has an enlarged diameter portion 5a formed upstream thereof, and an upstream end 5b thereof is opened.
【００１５】上記上流端部５ｂにはバルブホルダ１０が
嵌合的に固設されている。該バルブホルダ１０は、上記
上流端部５ｂの内周面に嵌合する径の円形の周壁１１
と、該周壁１１の上部両側を径方向へ突出させた取付壁
１２，１３と、これら両取付壁１２，１３の上端間を連
結する上壁１４と、該上壁１４の後部において、下端面
を流通パイプ５の外面に沿った円弧面にして垂設した後
壁１５と、略中央に流入口１６を穿設し、略環状で一部
に突壁１７ａを有する前壁１７とを、金属製板材をプレ
ス成形して一体に形成されている。これにより、バルブ
ホルダ１０の体内に、バルブ体収納室１８とバルブ軸挿
通室１９が形成されている。A valve holder 10 is fitted and fixed to the upstream end 5b. The valve holder 10 has a circular peripheral wall 11 having a diameter fitted to the inner peripheral surface of the upstream end 5b.
Mounting walls 12 and 13 having upper sides of the peripheral wall 11 projecting in the radial direction, an upper wall 14 connecting the upper ends of the mounting walls 12 and 13, and a lower end surface at a rear portion of the upper wall 14. A rear wall 15 vertically formed into an arc surface along the outer surface of the distribution pipe 5 and a front wall 17 having an inflow port 16 formed substantially in the center and having a substantially annular shape and having a partly protruded wall 17a. The sheet material is press-formed to be integrally formed. Thus, a valve body storage chamber 18 and a valve shaft insertion chamber 19 are formed in the body of the valve holder 10.
【００１６】そして、上記バルブホルダ１０の周壁１１
を流通パイプ５の端部内周面に嵌合し、後壁１５の下端
面を流通パイプ５の外周面に接合させ、これらを溶接等
により気密的に結合して、バルブホルダ１０を流通パイ
プ５に固設している。The peripheral wall 11 of the valve holder 10
Is fitted to the inner peripheral surface of the end portion of the distribution pipe 5, the lower end surface of the rear wall 15 is joined to the outer peripheral surface of the distribution pipe 5, and these are hermetically connected by welding or the like. It is fixed to.
【００１７】更に、上記バルブホルダ１０における流入
口１６を形成する入口壁２０は、前壁１７を下流側、す
なわち、バルブホルダ１０の内側へ折曲して筒状に延設
されているとともに、その入口部２０ａは、上流側が拡
開するフレア状に形成されている。このように入口壁２
０を折曲形成することにより、弁座面２０ｂを前壁１７
から間隔Ｄ1 を有して離間させている。このように、入
口壁２０を内側へ折曲することにより、バルブ７の回転
部の取り付けを容易にしている。Further, the inlet wall 20 forming the inflow port 16 in the valve holder 10 is formed by bending the front wall 17 on the downstream side, that is, inward of the valve holder 10 and extending in a cylindrical shape. The inlet portion 20a is formed in a flared shape in which the upstream side expands. Thus, the entrance wall 2
0 is bent so that the valve seat surface 20b is
And it is separated at a distance D 1 from. In this way, by bending the inlet wall 20 inward, the mounting of the rotating part of the valve 7 is facilitated.
【００１８】更に、該円筒状の流入口１６は、その中心
軸Ｘが流通パイプ５の中心軸Ｙに対して、上記突壁１７
ａ側、すなわち、後述するバルブ体７の回転中心側へ偏
心して形成されている。このように偏心させることによ
り、後述するバルブ体７が微少に開いた場合に最大に開
く図の下部における周壁１１と入口壁２０との距離Ｄ 2
を長くしている。Further, the cylindrical inlet 16 is provided at the center thereof.
The axis X is aligned with the center axis Y of the distribution pipe
a side, that is, toward the rotation center side of the valve body 7 described later.
It is formed with heart. By eccentricity in this way
When the valve body 7 described later opens slightly,
The distance D between the peripheral wall 11 and the entrance wall 20 at the bottom of the figure Two
Is longer.
【００１９】上記取付壁１２，１３間には弁軸２１が回
転可能に貫通設置され、そのバルブ軸挿通室１９部の弁
軸に板状のバルブ体７の基部７ａが固着されている。該
弁軸２１は上記取付壁１２，１３に固着された軸受２
３，２４により回転可能に支承されている。更に、該弁
軸２１の一端はバルブホルダ１０から長く突出され、そ
の先端部にバネストッパ２５が固着されている。A valve shaft 21 is rotatably penetrated between the mounting walls 12 and 13, and a base 7a of a plate-shaped valve body 7 is fixed to a valve shaft of a valve shaft insertion chamber 19 portion. The valve shaft 21 is a bearing 2 fixed to the mounting walls 12 and 13.
It is rotatably supported by 3, 24. Further, one end of the valve shaft 21 protrudes long from the valve holder 10, and a spring stopper 25 is fixed to a distal end thereof.
【００２０】上記弁軸２１にはこれと同軸に付勢手段で
あるコイルスプリング８が巻装され、その一端をバルブ
ホルダ１０に係止し、他端を上記バネストッパ２５に係
止して、該コイルスプリング８の付勢力によりバルブ体
７を常時閉方向へ付勢している。A coil spring 8 as urging means is wound around the valve shaft 21 coaxially with the valve shaft 21. One end of the coil spring 8 is engaged with the valve holder 10 and the other end is engaged with the spring stopper 25. The valve body 7 is normally urged in the closing direction by the urging force of the coil spring 8.
【００２１】上記バルブ体７は、上記流入口１６と同心
円で、かつ流入口１６より若干大径に形成されている。
これにより、バルブ体７の外周とバルブホルダ１０の周
壁１１との距離Ｄ3は、バルブ体７の回転中心と反対の
位置において最も大きくなる。The valve body 7 is formed concentric with the inlet 16 and slightly larger in diameter than the inlet 16.
Thereby, the distance D 3 between the outer periphery of the valve body 7 and the peripheral wall 11 of the valve holder 10 becomes the largest at a position opposite to the rotation center of the valve body 7.
【００２２】以上のようであるから、バルブ本体７の閉
塞時には、該バルブ体７がコイルスプリング８の付勢力
により、前壁１７から内側へ折曲した入口壁２０の弁座
面２０ｂに当接し、流入口１６を密閉する。このとき、
バルブ体７は、その外周端面がバルブホルダ１０の周壁
１１と非接触状態で閉作動するため、密閉状態に至るま
での回動が阻害されず、その密閉動作不良を起こすおそ
れがない。As described above, when the valve body 7 is closed, the valve body 7 comes into contact with the valve seat surface 20b of the inlet wall 20 bent inward from the front wall 17 by the urging force of the coil spring 8. , The inlet 16 is sealed. At this time,
Since the valve body 7 closes without its outer peripheral end face being in contact with the peripheral wall 11 of the valve holder 10, the rotation until reaching the sealed state is not hindered, and there is no possibility that the sealing operation failure will occur.
【００２３】また、上記閉弁状態からの開弁動作も、上
記のようにバルブ体７の外周端面とバルブホルダ１０と
が非接触状態であるため、開動作不良を起こすおそれも
ない。Also, in the valve opening operation from the above-mentioned valve closing state, since the outer peripheral end surface of the valve body 7 is not in contact with the valve holder 10 as described above, there is no possibility that an opening operation defect will occur.
【００２４】更に、流入口１６の周面が、上流側が拡開
するフレア状に形成されているため、排気ガスの流入が
スムースになり、気流音の発生が抑制される。また、バ
ルブ体７が微少に開いたとき、そのバルブ体７の回転中
心と反対側の開口量が最も多くなり、該部での排気流が
多くなる。この場合、該部でのバルブ体外周端面とこれ
と対向するバルブホルダの外周壁との距離が近いと排気
ガス流がバルブホルダの周壁に当たって気流音を発生す
るが、上記のように流入口１６を偏心させてバルブ体７
とバルブホルダ１０の周壁１１との距離Ｄ3を長くした
ことにより、上記の気流音の発生が防止される。Furthermore, since the peripheral surface of the inflow port 16 is formed in a flare shape in which the upstream side expands, the inflow of exhaust gas is smooth, and the generation of airflow noise is suppressed. Also, when the valve body 7 is slightly opened, the opening amount on the side opposite to the rotation center of the valve body 7 becomes the largest, and the exhaust flow in this part increases. In this case, when the distance between the outer peripheral end surface of the valve body at the portion and the outer peripheral wall of the valve holder facing the outer peripheral surface is short, the exhaust gas flow hits the peripheral wall of the valve holder and generates airflow noise. Eccentrically and the valve body 7
And by that increase the distance D 3 between the peripheral wall 11 of the valve holder 10, the occurrence of the above-mentioned flow noise is prevented.
【００２５】図４及び図５は第２実施例を示す。本第２
実施例は上記第１実施例のコイルスプリング８をバルブ
ホルダ１０内に装着したものである。すなわち、上記バ
ルブ軸挿通室１９内の弁軸２１にコイルスプリング８を
巻装し、その一端をバルブ体７に係止し、他端をバルブ
ホルダ１０の内面に係止して、バルブ体７を閉方向に付
勢したものである。FIGS. 4 and 5 show a second embodiment. Book second
In this embodiment, the coil spring 8 of the first embodiment is mounted in a valve holder 10. That is, the coil spring 8 is wound around the valve shaft 21 in the valve shaft insertion chamber 19, one end of the coil spring 8 is locked to the valve body 7, and the other end is locked to the inner surface of the valve holder 10. In the closing direction.
【００２６】その他の構造は上記第１実施例と同様であ
るため、上記と同一部分には同一符号を付してその説明
を省略する。本第２実施例においても、上記第１実施例
と同様の作用、効果を発揮する。Since other structures are the same as those of the first embodiment, the same parts as those described above are denoted by the same reference numerals and description thereof will be omitted. In the second embodiment, the same operation and effect as those of the first embodiment are exhibited.
【００２７】図６及び図７は第３実施例を示す。本実施
例は、上記図１乃至図３に示す実施例において、バルブ
ホルダ１０の周壁１１をなくし、更に、上記流入口１６
及びこれを形成する入口壁２０の形状を、上記バルブ体
７の回転中心の反対側を切り欠いた略一部切り欠き円状
に形成し、更にバルブ体７の外形を、上記入口壁２０に
対し若干大きい相似形、すなわちバルブ体７の回転中心
の反対側を切り欠いた略一部切り欠き円状に形成されて
いる。そして、バルブホルダ１０の前壁１７が排気管５
の上流端部５ｂに直接気密的に固着されている。FIGS. 6 and 7 show a third embodiment. In this embodiment, the peripheral wall 11 of the valve holder 10 is eliminated in the embodiment shown in FIGS.
And the shape of the inlet wall 20 forming the same is formed in a substantially partially cut circular shape in which the opposite side of the rotation center of the valve body 7 is cut out. On the other hand, it has a slightly larger similar shape, that is, a substantially partially cut circular shape in which the opposite side of the rotation center of the valve body 7 is cut out. The front wall 17 of the valve holder 10 is
Is directly and air-tightly fixed to the upstream end 5b.
【００２８】また、排気管５と、入口壁２０の略半円部
と、バルブ体７の略半円部は同心的に形成されている。
上記の構造により、バルブ体７の回転中心の反対側の入
口壁２０ｃとバルブ体７の外周端面７ｂは略直線に形成
され、該入口壁２０ｃと排気管５との間の距離Ｄ4は前
記実施例のＤ2よりも長く、更にバルブ体７の外周端面
７ｂと排気管５との間の距離Ｄ5は前記実施例のＤ3より
も長くなっている。The exhaust pipe 5, the substantially semicircular portion of the inlet wall 20, and the substantially semicircular portion of the valve body 7 are formed concentrically.
The structure of the outer peripheral end surface 7b opposite the inlet wall 20c and the valve body 7 of the center of rotation of the valve body 7 is formed in a substantially straight line, the distance D 4 between the inlet wall 20c and the exhaust pipe 5 is the longer than D 2 of the embodiment, it further becomes the distance D 5 between the outer peripheral end surface 7b of the valve body 7 and the exhaust pipe 5 longer than D 3 of the embodiment.
【００２９】更に、バルブ体７における上記入口壁２０
と対向する側の面には、打音防止用の緩衝材３０、例え
ばワイヤメッシュが固着されている。その他の構造は上
記図１乃至図３に示す実施例と同様であるため、同一部
分には前記と同一の符号を付してその説明を省略する。Further, the inlet wall 20 of the valve body 7
A cushioning material 30, for example, a wire mesh, for preventing a tapping sound is fixed to the surface on the side opposite to. Since other structures are the same as those of the embodiment shown in FIGS. 1 to 3, the same parts are denoted by the same reference numerals and the description thereof will be omitted.
【００３０】本第３実施例によれば、上記第１実施例と
同様の効果が得られる上に、バルブ体７の回転中心の反
対側の上記距離Ｄ4，Ｄ5を上記第１実施例のＤ2，Ｄ3よ
りも大きくすることができ、上記の気流音の発生防止効
果が一層高まる。更に、緩衝材３０の存在により、バル
ブ体７の閉塞時にこれが緩衝材３０に当たって打音の発
生を防止する。したがって、本実施例においては、気流
音とバルブの打音の双方の発生を防止して、消音器とし
ての消音性能を高めることができる。According to the third embodiment, the same effects as those of the first embodiment can be obtained, and the distances D 4 and D 5 on the opposite side of the rotation center of the valve body 7 can be changed. D 2 and D 3 , the effect of preventing the generation of the airflow noise is further enhanced. Further, the presence of the cushioning member 30 prevents the tapping sound from hitting the cushioning member 30 when the valve body 7 is closed. Therefore, in the present embodiment, it is possible to prevent both the airflow noise and the tapping sound of the valve from being generated, and to improve the silencing performance of the silencer.
【００３１】図８は第４実施例を示す。本第４実施例
は、上記第１及び第２実施例における流入口１６にパイ
プ４０を挿嵌したものである。FIG. 8 shows a fourth embodiment. In the fourth embodiment, a pipe 40 is inserted into the inflow port 16 in the first and second embodiments.
【００３２】すなわち、流入口１６を形成する入口壁２
０の内面に排気管を形成するパイプ４０の端部４１を気
密的に嵌合して溶接或いはロー付けにて固着したもので
ある。その他の構造は上記第１実施例と同様であるた
め、同一部分には同一符号を付してその説明は省略す
る。That is, the inlet wall 2 forming the inflow port 16
An end 41 of a pipe 40 forming an exhaust pipe is hermetically fitted to the inner surface of the exhaust pipe 0 and fixed by welding or brazing. Since other structures are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.
【００３３】本実施例においては、上記第１実施例と同
様の効果を発揮する上に、インナパイプやアウトレット
等の排気管の途中にバルブを設ける場合に、バルブホル
ダ１０の流入口１６に別のパイプ４０を挿嵌し、固着す
るだけでよいため、その製造が容易になる。この場合、
特に入口壁２０を内側へ折曲して延設されているので、
パイプ４０の固着が容易でかつ強固になる。In the present embodiment, the same effects as those of the first embodiment are exhibited, and when a valve is provided in the middle of an exhaust pipe such as an inner pipe or an outlet, the valve is provided separately from the inlet 16 of the valve holder 10. It is only necessary to insert and fix the pipe 40, so that its manufacture becomes easy. in this case,
In particular, since the entrance wall 20 is bent inward and extended,
The pipe 40 is easily and firmly fixed.
【００３４】なお、本発明の排気管用バルブは、上記第
１実施例では、排気出口管を２本設けてその一方の排気
出口管の上流端に設けたが、これに限るものではなく、
その他、１本の排気出口管を有し、マフラ内に複数のイ
ンナパイプを有するマフラにおいて、その一部のインナ
パイプに本発明の排気管用バルブを付設するようにして
もよい。In the first embodiment, the exhaust pipe valve of the present invention is provided with two exhaust outlet pipes and provided at the upstream end of one of the exhaust outlet pipes. However, the present invention is not limited to this.
In addition, in a muffler having one exhaust outlet pipe and a plurality of inner pipes in the muffler, the exhaust pipe valve of the present invention may be attached to a part of the inner pipes.
【００３５】[0035]
【発明の効果】以上のようであるから、請求項１記載の
発明によれば、簡易な構造でかつ低コストにより流入口
を密閉でき、かつそのバルブ体の開閉動作不良を起こす
おそれがない。したがって、本発明を図１に示すような
マフラに適用すれば、低排気ガス流量時の消音性能を十
分得ることができる。As described above, according to the first aspect of the present invention, the inflow port can be hermetically sealed with a simple structure and at low cost, and there is no possibility that the opening and closing operation of the valve body may be defective. Therefore, if the present invention is applied to a muffler as shown in FIG. 1, a sufficient noise reduction performance at a low exhaust gas flow rate can be obtained.
【００３６】請求項２記載の発明によれば、更に排気管
への排気ガスの流入がスムースになり、気流音の発生を
抑制できる。そして請求項３記載の発明によれば、更に
バルブの微少開口時の気流音の発生を防止することがで
きる。According to the second aspect of the present invention, the flow of the exhaust gas into the exhaust pipe becomes smoother, and the generation of the airflow noise can be suppressed. According to the third aspect of the invention, it is possible to further prevent the generation of airflow noise when the valve is slightly opened.
【図１】本発明の排気管用バルブを適用したマフラの縦
断面図。FIG. 1 is a longitudinal sectional view of a muffler to which an exhaust pipe valve according to the present invention is applied.
【図２】本発明の第１実施例を示す排気管用バルブの正
面図。FIG. 2 is a front view of an exhaust pipe valve according to the first embodiment of the present invention.
【図３】図２におけるＡ−Ａ線断面図。FIG. 3 is a sectional view taken along line AA in FIG. 2;
【図４】本発明の第２実施例を示す排気管用バルブの縦
断面図。FIG. 4 is a vertical sectional view of an exhaust pipe valve according to a second embodiment of the present invention.
【図５】図４におけるＢ−Ｂ線断面図。FIG. 5 is a sectional view taken along line BB in FIG. 4;
【図６】本発明の第３実施例を示す排気管用バルブの正
面図。FIG. 6 is a front view of an exhaust pipe valve according to a third embodiment of the present invention.
【図７】図６におけるＣ−Ｃ線断面図。FIG. 7 is a sectional view taken along line CC in FIG. 6;
【図８】本発明の第４実施例を示す排気管用バルブの縦
断面図。FIG. 8 is a longitudinal sectional view of an exhaust pipe valve according to a fourth embodiment of the present invention.
【図９】従来の排気用バルブを示すマフラの縦断面図。FIG. 9 is a longitudinal sectional view of a muffler showing a conventional exhaust valve.
５…排気管 ６…排気管用バルブ ７…バルブ体 ８…付勢手段 １０…バルブホルダ １６…流入口 １７…前壁 ２０…入口壁 ２０ａ…フレア部の入口部 DESCRIPTION OF SYMBOLS 5 ... Exhaust pipe 6 ... Exhaust pipe valve 7 ... Valve body 8 ... Urging means 10 ... Valve holder 16 ... Inlet 17 ... Front wall 20 ... Inlet wall 20a ... Inlet part of flare part
Claims (3)
設け、該バルブホルダの前壁に流入口を形成し、バルブ
ホルダにバルブ体を、上記流入口の下流側に当接したり
離間するように開閉可能に付設し、更に、該バルブ体を
閉方向に付勢する付勢手段を設けたことを特徴とするエ
ンジンのマフラにおける排気管用バルブ。1. A valve holder is provided in an airtight manner on an upstream side of an exhaust pipe, an inlet is formed in a front wall of the valve holder, and a valve body is brought into contact with or separated from the valve holder on the downstream side of the inlet. A valve for an exhaust pipe in an muffler of an engine, wherein the valve is provided so as to be openable and closable, and further provided with a biasing means for biasing the valve body in a closing direction.
開するフレア状に形成したことを特徴とする請求項１記
載のエンジンのマフラにおける排気管用バルブ。2. The exhaust pipe valve for an engine muffler according to claim 1, wherein an upstream end of the inflow port is formed in a flare shape that expands in an upstream direction.
は排気管との距離を、バルブ体の回転中心と反対の位置
において最も大きく設定したことを特徴とする請求項１
又は２記載のエンジンのマフラにおける排気管用バル
ブ。3. The valve according to claim 1, wherein a distance between an outer periphery of said valve body and a valve holder or an exhaust pipe is set to be largest at a position opposite to a rotation center of the valve body.
Or an exhaust pipe valve in the muffler of the engine according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16787798A JP3153798B2 (en) | 1998-06-16 | 1998-06-16 | Exhaust pipe valve in engine muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16787798A JP3153798B2 (en) | 1998-06-16 | 1998-06-16 | Exhaust pipe valve in engine muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000002112A true JP2000002112A (en) | 2000-01-07 |
| JP3153798B2 JP3153798B2 (en) | 2001-04-09 |
Family
ID=15857745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16787798A Expired - Lifetime JP3153798B2 (en) | 1998-06-16 | 1998-06-16 | Exhaust pipe valve in engine muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3153798B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1186756A2 (en) * | 2000-09-11 | 2002-03-13 | Calsonic Kansei Corporation | Pressure sensible valve for exhaust muffler and method of assembling same |
| WO2010120436A2 (en) * | 2009-04-16 | 2010-10-21 | Tenneco Automotive Operating Company Inc. | Snap action valve with bumper pad |
| US8215103B2 (en) | 2007-03-16 | 2012-07-10 | Tenneco Automotive Operating Company Inc. | Snap-action valve for exhaust system |
| US8256570B2 (en) | 2010-09-06 | 2012-09-04 | Yutaka Giken Co., Ltd. | Exhaust flow control device for exhaust muffler |
| US8353153B2 (en) | 2010-02-25 | 2013-01-15 | Tenneco Automotive Operating Company Inc. | Snapper valve for hot end systems with burners |
| US8381401B2 (en) | 2009-04-16 | 2013-02-26 | Tenneco Automotive Operating Company Inc. | Method of installing rotatable flapper valve to an interior of a conduit |
| US8468813B2 (en) | 2007-03-16 | 2013-06-25 | Tenneco Automotive Operating Company Inc. | Snap-action valve for exhaust system |
| WO2013115434A1 (en) * | 2012-01-30 | 2013-08-08 | 세종공업 주식회사 | Valve device for muffler |
| US8657065B1 (en) | 2012-12-14 | 2014-02-25 | Tenneco Automotive Operating Company Inc. | Exhaust valve with resilient spring pad |
| KR101463238B1 (en) * | 2014-04-04 | 2014-11-24 | 주식회사 코웰 | Variable valve for car muffler |
| EP3139008A4 (en) * | 2014-04-28 | 2018-02-28 | Futaba Industrial Co. Ltd. | Muffler |
| EP3394410A4 (en) * | 2015-12-24 | 2019-06-19 | Middleville Tool&Die Co. | Passive exhaust valve with floating spring stop |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100437309B1 (en) | 1995-07-12 | 2004-09-08 | 교와 핫꼬 고교 가부시끼가이샤 | Detergent composition |
-
1998
- 1998-06-16 JP JP16787798A patent/JP3153798B2/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1186756B1 (en) * | 2000-09-11 | 2005-12-21 | Calsonic Kansei Corporation | Pressure sensible valve for exhaust muffler and method of assembling same |
| EP1186756A2 (en) * | 2000-09-11 | 2002-03-13 | Calsonic Kansei Corporation | Pressure sensible valve for exhaust muffler and method of assembling same |
| US8215103B2 (en) | 2007-03-16 | 2012-07-10 | Tenneco Automotive Operating Company Inc. | Snap-action valve for exhaust system |
| US8468813B2 (en) | 2007-03-16 | 2013-06-25 | Tenneco Automotive Operating Company Inc. | Snap-action valve for exhaust system |
| US8381401B2 (en) | 2009-04-16 | 2013-02-26 | Tenneco Automotive Operating Company Inc. | Method of installing rotatable flapper valve to an interior of a conduit |
| US8191572B2 (en) | 2009-04-16 | 2012-06-05 | Tenneco Automotive Operating Company Inc. | Snap action valve with bumper pad |
| WO2010120436A3 (en) * | 2009-04-16 | 2011-01-13 | Tenneco Automotive Operating Company Inc. | Snap action valve with bumper pad |
| WO2010120436A2 (en) * | 2009-04-16 | 2010-10-21 | Tenneco Automotive Operating Company Inc. | Snap action valve with bumper pad |
| US8353153B2 (en) | 2010-02-25 | 2013-01-15 | Tenneco Automotive Operating Company Inc. | Snapper valve for hot end systems with burners |
| US8256570B2 (en) | 2010-09-06 | 2012-09-04 | Yutaka Giken Co., Ltd. | Exhaust flow control device for exhaust muffler |
| EP3296532A1 (en) * | 2010-11-29 | 2018-03-21 | Tenneco Automotive Operating Company Inc. | Snap-action valve for exhaust system |
| WO2013115434A1 (en) * | 2012-01-30 | 2013-08-08 | 세종공업 주식회사 | Valve device for muffler |
| US8657065B1 (en) | 2012-12-14 | 2014-02-25 | Tenneco Automotive Operating Company Inc. | Exhaust valve with resilient spring pad |
| KR101463238B1 (en) * | 2014-04-04 | 2014-11-24 | 주식회사 코웰 | Variable valve for car muffler |
| EP3139008A4 (en) * | 2014-04-28 | 2018-02-28 | Futaba Industrial Co. Ltd. | Muffler |
| EP3394410A4 (en) * | 2015-12-24 | 2019-06-19 | Middleville Tool&Die Co. | Passive exhaust valve with floating spring stop |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3153798B2 (en) | 2001-04-09 |
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