JPH10299453A - Exhaust muffler with built-in valve for automobile - Google Patents
Exhaust muffler with built-in valve for automobileInfo
- Publication number
- JPH10299453A JPH10299453A JP11374897A JP11374897A JPH10299453A JP H10299453 A JPH10299453 A JP H10299453A JP 11374897 A JP11374897 A JP 11374897A JP 11374897 A JP11374897 A JP 11374897A JP H10299453 A JPH10299453 A JP H10299453A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- exhaust
- muffler
- flow rate
- built
- 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、排気流量の増減に
伴って開閉動作する流量感応バルブがマフラ内チューブ
の端部位置に設けられた自動車用バルブ内蔵排気マフラ
の技術分野に属する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an exhaust muffler with a built-in valve for a vehicle, in which a flow sensing valve which opens and closes in accordance with an increase and decrease in an exhaust flow rate is provided at an end of an inner tube of a muffler.
【0002】[0002]
【従来の技術】従来、自動車用バルブ内蔵排気マフラと
しては、例えば、図6に示すマフラが知られている(国
際公開WO95/13460号公報等を参照)。2. Description of the Related Art Conventionally, as an exhaust muffler with a built-in valve for a vehicle, for example, a muffler shown in FIG. 6 has been known (see International Publication WO95 / 13460).
【0003】この排気マフラは、図6に示すように、マ
フラ内に設置されたバルブ(この場合はチューブの開口
面積を変更)は、バネ力により閉じようとする力に対
し、排気ガス流によりバルブを開き、内部ガス圧を一定
に制御している。In this exhaust muffler, as shown in FIG. 6, a valve (in this case, the opening area of a tube is changed) installed in the muffler is closed by a spring force, but is compressed by an exhaust gas flow. The valve is opened to keep the internal gas pressure constant.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来の自動車用バルブ内蔵排気マフラにあっては、バルブ
の全閉位置から全開位置までのあらゆるバルブ開度位置
をとっても一定のバネ力が作用しているものであるた
め、下記の問題を有する。However, in the above-described conventional exhaust muffler with a built-in valve for a vehicle, a constant spring force acts even when the valve is at any valve opening position from a fully closed position to a fully opened position. Therefore, it has the following problems.
【0005】(1) バルブ開度と排気ガス流量が比例し、
内部ガス圧を一定圧とする制御が行なわれるだけで、低
流量域でバルブ全閉による高い消音効果と高流量域での
バルブ全開によるエンジン出力向上効果とを両立させる
ような制御を行なうことができない。(1) The valve opening is proportional to the exhaust gas flow rate,
Only by controlling the internal gas pressure to a constant pressure, it is possible to perform control that achieves both a high noise reduction effect by fully closing the valve in the low flow rate range and an engine output improvement effect by fully opening the valve in the high flow rate range. Can not.
【0006】(2) 排気ガスがマフラ内チューブから直接
バルブ本体に当たるため、バルブ全閉状態からバルブが
開き始める排気ガス流量レベルで排気ガス流量が変動す
るような場合、バルブの開閉が繰り返され、バルブ本体
と座面とが繰り返し衝突することによるバタツキ音や振
動が発生する。(2) Since the exhaust gas directly hits the valve body from the muffler inner tube, when the exhaust gas flow rate fluctuates at the exhaust gas flow level at which the valve starts to open from the fully closed state, the opening and closing of the valve is repeated, Flaps and vibrations are generated due to repeated collision between the valve body and the seat surface.
【0007】これらの問題を解決するために、モータ等
をアクチュエータを用い、エンジン回転数や排気圧を検
出し、検出値が設定しきい値となった時にアクチュエー
タ駆動によりバルブを開閉制御する装置も提案されてい
るが(例えば、特開平2−81911号公報の第4図,
第5図)、アクチュエータ等の電子制御系を追加しなけ
ればならないことでシステムが大変高価となってしま
う。[0007] In order to solve these problems, there is also a device that uses an actuator such as a motor to detect the engine speed and exhaust pressure, and controls the opening and closing of the valve by driving the actuator when the detected value reaches a set threshold value. It has been proposed (see, for example, FIG. 4 of JP-A-2-81911,
(Fig. 5), the system becomes very expensive due to the need to add an electronic control system such as an actuator.
【0008】さらに、温度により形状が変化するバイメ
タルや形状記憶合金等を用い、マフラ内チューブの開口
面積を制御する装置として、特開昭61−96117号
公報に記載のものが知られているが、この装置も高価な
部材を用いることからシステムが大変高価となってしま
うし、高熱雰囲気であるマフラ内で用いられるものであ
るため、高い熱耐久性が要求されることになる。Further, as a device for controlling an opening area of a tube in a muffler using a bimetal or a shape memory alloy whose shape changes with temperature, a device described in Japanese Patent Application Laid-Open No. 61-96117 is known. However, since this device also uses expensive members, the system becomes very expensive, and since it is used in a muffler which is a high-temperature atmosphere, high thermal durability is required.
【0009】本発明の課題とするところは、低コストで
ありながら、高応答のバルブ開閉動作による消音モード
切り替えを達成すると共にバルブ全閉時にバタツキ音や
振動の発生が無い自動車用バルブ内蔵排気マフラを提供
することにある。It is an object of the present invention to achieve a low-cost, high-response muffler mode switching by a valve opening / closing operation with a high response, and no flapping noise or vibration when a valve is fully closed. Is to provide.
【0010】[0010]
(解決手段1)上記課題を解決する請求項1記載の発明
は、排気流量の増減に伴って開閉動作する流量感応バル
ブがマフラ内チューブの端部位置に設けられた自動車用
バルブ内蔵排気マフラにおいて、前記流量感応バルブ
を、一端部がマフラ内に開口し他端部が外気もしくはマ
フラ内に開口している排気出力チューブのマフラ内開口
端に配置されたバルブ本体と、前記バルブ本体を開閉回
動可能に支持するバルブ軸と、前記バルブ軸に設けら
れ、バルブ軸に対しバルブ本体とは反対方向に延設して
排気入力チューブの出口部に配置された流量感知部材と
を備え、前記流量感知部材の重力作用点を、バルブ閉方
向モーメントが得られるようにバルブ軸からオフセット
して設定し、且つ、流量感知部材が受ける排気ガス受圧
面積を、バルブ全閉時に最小面積で、バルブ開度の増大
に伴なって面積が拡大する設定としたことを特徴とす
る。According to a first aspect of the present invention, there is provided an exhaust muffler with a built-in valve for a vehicle, wherein a flow-sensitive valve that opens and closes in accordance with an increase or a decrease in an exhaust flow rate is provided at an end position of a tube inside the muffler. A valve body disposed at a muffler opening end of an exhaust output tube having one end opening into the muffler and the other end opening into the outside air or the muffler; A valve shaft movably supported, and a flow sensing member provided on the valve shaft, extending in a direction opposite to the valve body with respect to the valve shaft, and disposed at an outlet of an exhaust input tube; The gravity action point of the sensing member is set to be offset from the valve axis so that a moment in the valve closing direction is obtained, and the exhaust gas receiving pressure area received by the flow rate sensing member is set when the valve is fully closed. In minimum area, and characterized in that a setting area is accompanied to the increase of the valve opening is enlarged.
【0011】(解決手段2)上記課題を解決する請求項
2記載の発明は、請求項1記載の自動車用バルブ内蔵排
気マフラにおいて、前記バルブ本体の中央位置に、バル
ブ全閉時にマフラ内排気ガスが排気出力チューブ内に向
かって流れる排気ガス流を作り出すガス流孔を形成した
ことを特徴とする。According to a second aspect of the present invention, there is provided an exhaust muffler with a built-in valve for an automobile according to the first aspect, wherein the exhaust gas in the muffler is provided at a central position of the valve body when the valve is fully closed. Has a gas flow hole for producing an exhaust gas flow flowing toward the inside of the exhaust output tube.
【0012】(解決手段3)上記課題を解決する請求項
3記載の発明は、請求項1または請求項2記載の自動車
用バルブ内蔵排気マフラにおいて、前記流量感知部材
を、バルブ軸に固定された支柱部と、支柱部に一端が固
定され、排気入力チューブの内径より少し小さな外径と
バルブ全閉時に排気ガス受圧面積となる厚みを有する半
円筒形状であり、一部が排気入力チューブ内に配置され
る流量感知部とによって構成したことを特徴とする。According to a third aspect of the present invention, there is provided an exhaust muffler with a built-in valve for an automobile according to the first or second aspect, wherein the flow rate sensing member is fixed to a valve shaft. One end is fixed to the strut portion and the strut portion, and has a semi-cylindrical shape having an outer diameter slightly smaller than the inner diameter of the exhaust input tube and a thickness that becomes the exhaust gas receiving pressure area when the valve is fully closed, and a part is inside the exhaust input tube. And a flow rate sensor disposed.
【0013】[0013]
(実施の形態1)まず、構成を説明する。 Embodiment 1 First, the configuration will be described.
【0014】実施の形態1は請求項1,2,3記載の発
明に対応する。Embodiment 1 corresponds to the first, second and third aspects of the present invention.
【0015】図1は実施の形態1の自動車用バルブ内蔵
排気マフラの流量感応バルブを示す分解斜視図、図2は
実施の形態1の自動車用バルブ内蔵排気マフラの流量感
応バルブを示す正面図、図3は実施の形態1の自動車用
バルブ内蔵排気マフラを示す全体断面図である。FIG. 1 is an exploded perspective view showing a flow-sensitive valve of an exhaust muffler with a built-in automotive valve according to the first embodiment. FIG. 2 is a front view showing a flow-sensitive valve of the exhaust muffler with a built-in automotive valve of the first embodiment. FIG. 3 is an overall sectional view showing the exhaust muffler with a built-in valve for a vehicle according to the first embodiment.
【0016】図3において、Aは流量感応バルブ、10
はマフラ側板、11は前端板、12は後端板、13は第
1バッフルプレート、14は第2バッフルプレート、1
5は排気入力チューブ、16は第1チューブ、17は第
2チューブ、18は第1排気出力チューブ、19は第2
排気出力チューブ、20は第1室、21は第2室、22
は第3室である。In FIG. 3, A is a flow rate sensitive valve, 10
Is a muffler side plate, 11 is a front end plate, 12 is a rear end plate, 13 is a first baffle plate, 14 is a second baffle plate, 1
5 is an exhaust input tube, 16 is a first tube, 17 is a second tube, 18 is a first exhaust output tube, and 19 is a second exhaust tube.
Exhaust output tube, 20 is the first chamber, 21 is the second chamber, 22
Is the third room.
【0017】前記流量感応バルブAは、排気流量の増減
に伴って開閉動作するバルブで、第2室21と外気を連
通する第2排気出力チューブ19のマフラ内開口端に配
置されている。The flow-sensitive valve A is a valve that opens and closes as the flow rate of the exhaust gas increases and decreases. The valve A is disposed at the open end inside the muffler of the second exhaust output tube 19 that communicates the second chamber 21 with the outside air.
【0018】前記排気入力チューブ15は、エンジンか
らの排気チューブに接続され、排気ガスを第2室21へ
導入する。The exhaust input tube 15 is connected to an exhaust tube from the engine, and introduces exhaust gas into the second chamber 21.
【0019】前記第1チューブ16は、第2バッフルプ
レート14に設けられ、一端が第2室21に開口し、他
端が第3室22に開口している。The first tube 16 is provided on the second baffle plate 14, and has one end open to the second chamber 21 and the other end open to the third chamber 22.
【0020】前記第2チューブ17は、第1バッフルプ
レート13に設けられ、一端が第1室20に開口し、他
端が第2室21に開口している。The second tube 17 is provided on the first baffle plate 13, and has one end open to the first chamber 20 and the other end open to the second chamber 21.
【0021】前記第1排気出力チューブ18は、第1バ
ッフルプレート13と第2バッフルプレート14を貫通
して設けられ、一端部は第1室20に開口し、他端部は
外気に開口している。The first exhaust output tube 18 is provided so as to penetrate the first baffle plate 13 and the second baffle plate 14, and has one end opening to the first chamber 20 and the other end opening to the outside air. I have.
【0022】前記第2排気出力チューブ19は、第2バ
ッフルプレート14を貫通して設けられ、一端部には流
量感応バルブAが設けられ、他端部は外気に開口してい
て、流量感応バルブAが開くと第2室21が外気に連通
する。The second exhaust output tube 19 is provided through the second baffle plate 14, and has a flow-sensitive valve A at one end and an open end at the other end. When A opens, the second chamber 21 communicates with the outside air.
【0023】前記流量感応バルブAが閉状態の時は、第
1室20及び第2室21が拡張室で第3室22がレゾネ
ータ室で第1排気出力チューブ18のみから排気ガスが
外部に排出される。流量感応バルブAが開状態の時に
は、第1排気出力チューブ18と第2排気出力チューブ
19により排気ガスが外部に排出される。When the flow sensitive valve A is closed, the first chamber 20 and the second chamber 21 are expansion chambers, the third chamber 22 is a resonator chamber, and exhaust gas is exhausted only from the first exhaust output tube 18 to the outside. Is done. When the flow rate sensitive valve A is in the open state, the first exhaust output tube 18 and the second exhaust output tube 19 exhaust the exhaust gas to the outside.
【0024】図1及び図2において、Aは流量感応バル
ブ、1はバルブ本体、2はバルブ軸、3は流量感知部
材、4はガス流孔、5は軸支持ブラケット、14は第2
バッフルプレート、15は排気入力チューブ、19は第
2排気出力チューブである。1 and 2, A is a flow sensitive valve, 1 is a valve body, 2 is a valve shaft, 3 is a flow sensing member, 4 is a gas flow hole, 5 is a shaft support bracket, and 14 is a second support bracket.
A baffle plate, 15 is an exhaust input tube, and 19 is a second exhaust output tube.
【0025】前記バルブ本体1は、一端部がマフラ内に
開口し他端部が外気に開口している第2排気出力チュー
ブ19のマフラ内開口端に配置される。The valve main body 1 is disposed at an open end in the muffler of the second exhaust output tube 19, one end of which is open into the muffler and the other end is open to the outside air.
【0026】前記バルブ軸2は、バルブ本体1を開閉回
動可能に支持する軸で、第2バッフルプレート14等に
固定される軸支持ブラケット5に両端支持されている。The valve shaft 2 is a shaft for supporting the valve body 1 so as to be able to open and close, and is supported at both ends by a shaft support bracket 5 fixed to a second baffle plate 14 or the like.
【0027】前記流量感知部材3は、バルブ軸2に設け
られ、バルブ軸2に対しバルブ本体1とは反対方向に延
設して排気入力チューブ15の出口部に配置された部材
で、バルブ軸2に固定された支柱部3aと、支柱部3a
に一端が固定され、排気入力チューブ15の内径より少
し小さな外径とバルブ全閉時に排気ガス受圧面積となる
厚みを有する半円筒形状であり、一部が排気入力チュー
ブ15内に配置される流量感知部3bとによって構成さ
れる。この構成とすることで、流量感知部材3の重力作
用点が、バルブ閉方向モーメントが得られるようにバル
ブ軸2からオフセットして設定され(図4参照)、且
つ、流量感知部材3が受ける排気ガス受圧面積が、バル
ブ全閉時に半円筒厚みによる最小面積で、バルブ開度の
増大に伴なって半円筒周面の投影面積が増すことで排気
ガス受圧面積が拡大する設定としている。The flow rate sensing member 3 is provided on the valve shaft 2, extends in a direction opposite to the valve body 1 with respect to the valve shaft 2, and is disposed at an outlet of the exhaust input tube 15. A support 3a fixed to the support 2 and a support 3a
Has a semi-cylindrical shape having an outer diameter slightly smaller than the inner diameter of the exhaust input tube 15 and a thickness that becomes an exhaust gas pressure receiving area when the valve is fully closed, and a part of which is disposed in the exhaust input tube 15. And a sensing unit 3b. With this configuration, the gravitational action point of the flow rate sensing member 3 is set to be offset from the valve shaft 2 so as to obtain a valve closing moment (see FIG. 4), and the flow rate sensing member 3 receives exhaust gas. The gas receiving pressure area is a minimum area based on the thickness of the half cylinder when the valve is fully closed, and the exhaust gas receiving pressure area is set to increase by increasing the projected area of the semi-cylindrical peripheral surface as the valve opening increases.
【0028】前記ガス流孔4は、バルブ本体1の中央位
置に形成され、バルブ全閉時にマフラ内排気ガスが第2
排気出力チューブ19内に向かって流れる排気ガス流を
作り出す。The gas flow hole 4 is formed at a central position of the valve body 1 and exhaust gas in the muffler is discharged to the second position when the valve is fully closed.
An exhaust gas flow flowing into the exhaust output tube 19 is created.
【0029】次に、作用を説明する。Next, the operation will be described.
【0030】[低流量時]低流量時には、図4に示すよ
うに、流量感知部材3の重力作用点がバルブ軸2からオ
フセットして設定されていることで流量感知部材3が重
力を受けることによる力F1によるバルブ閉方向モーメ
ントが得られ、流量感知部3bの円筒厚みによる最小の
排気ガス受圧面積に作用する力F2によるバルブ開方向
モーメントより大きく、バルブ本体1が第2排気出力チ
ューブ19の開口端に密着するバルブ閉状態が得られ
る。[Low Flow] At low flow, as shown in FIG. 4, the gravity sensing point of the flow sensing member 3 is offset from the valve shaft 2 so that the flow sensing member 3 receives gravity. Is greater than the moment in the valve opening direction due to the force F2 acting on the minimum exhaust gas receiving pressure area due to the cylindrical thickness of the flow rate sensor 3b, and the valve body 1 is connected to the second exhaust output tube 19 by the force F1. A valve closed state in close contact with the open end is obtained.
【0031】加えて、バルブ本体1の中央位置にはガス
流孔4が形成されているため、バルブ全閉時にマフラ内
排気ガスが第2排気出力チューブ19内に向かって流れ
る排気ガス流が作り出され、この排気動圧によりバルブ
本体1を閉じる方向の力が増大し、バルブ本体1が第2
排気出力チューブ19の開口端に強く密着するバルブ閉
状態が得られる。In addition, since the gas flow hole 4 is formed at the center position of the valve body 1, the exhaust gas in the muffler flows toward the inside of the second exhaust output tube 19 when the valve is fully closed. Due to this exhaust dynamic pressure, the force in the direction of closing the valve body 1 increases, and the valve body 1
A valve closed state in which the exhaust output tube 19 is in close contact with the open end is obtained.
【0032】[流量増大時]排気入力チューブ15から
の排気ガス流量が増大し、排気ガス受圧面積に作用する
力F2によるバルブ開方向モーメントがバルブ閉方向モ
ーメントを上回ると、図5に示すように、バルブ軸2を
中心としてバルブ本体1及び流量感知部材3が図面右方
向に回動を開始し、バルブ本体1が第2排気出力チュー
ブ19の開口端から離れて流量感応バルブAが開き始め
る。[When the flow rate increases] When the flow rate of the exhaust gas from the exhaust input tube 15 increases and the moment in the valve opening direction due to the force F2 acting on the exhaust gas pressure receiving area exceeds the moment in the valve closing direction, as shown in FIG. Then, the valve body 1 and the flow sensing member 3 start to rotate rightward in the drawing about the valve shaft 2, and the valve body 1 moves away from the opening end of the second exhaust output tube 19, and the flow sensitive valve A starts to open.
【0033】流量感応バルブAが開き始めると、図5か
らも明らかなように、流量感知部3bの半円筒周面の投
影面積が増すことでバルブ開度と共に排気ガス受圧面積
が拡大し、流量感知部3bに作用する力の増大に伴いバ
ルブ本体1が右方向に回動して一気にバルブ全開とな
る。When the flow sensing valve A starts to open, as is apparent from FIG. 5, the projected area of the semi-cylindrical peripheral surface of the flow sensing unit 3b increases, so that the exhaust gas receiving pressure area increases with the valve opening, and the flow rate increases. As the force acting on the sensing portion 3b increases, the valve body 1 rotates rightward and the valve is fully opened at a stretch.
【0034】よって、バルブが開き始めると排気ガスの
流量が少し増すだけで一気にバルブ全開となり、エンジ
ン回転数やエンジン負荷等があるレベルになった時にバ
ルブ全開を得たい場合、その設定が容易となる。Therefore, when the valve starts to open, the valve becomes fully open at a stretch just by slightly increasing the flow rate of the exhaust gas. If it is desired to fully open the valve when the engine speed, the engine load, etc. reach a certain level, it is easy to set. Become.
【0035】[流量減少時]バルブ全開状態で排気ガス
の流量が減少し、流量感応バルブAに作用するバルブ閉
方向モーメントがバルブ開方向モーメントを上回ると、
バルブ本体1が第2排気出力チューブ19の開口端に近
づき流量感応バルブAが閉じ始める。[When the flow rate decreases] When the flow rate of the exhaust gas decreases in the fully opened state of the valve and the valve closing direction moment acting on the flow rate sensitive valve A exceeds the valve opening direction moment,
As the valve body 1 approaches the open end of the second exhaust output tube 19, the flow-sensitive valve A starts to close.
【0036】流量感応バルブAが閉じ始めると、流量感
知部3bの半円筒周面の投影面積が減ることでバルブ開
度と共に排気ガス受圧面積が縮小し、流量感知部3bに
作用する力の減少に伴いバルブ本体1が左方向に回動し
て一気にバルブ全閉となる。よって、バルブが閉じ始め
ると排気ガスの流量が少し減るだけで一気にバルブ全閉
となる。When the flow sensing valve A starts to close, the projected area of the semi-cylindrical peripheral surface of the flow sensing part 3b decreases, so that the exhaust gas receiving pressure area decreases with the valve opening, and the force acting on the flow sensing part 3b decreases. As a result, the valve body 1 rotates to the left and the valve is completely closed at a stretch. Therefore, when the valve starts to close, the valve is completely closed at once with a slight decrease in the flow rate of the exhaust gas.
【0037】上記のように、流量増大時と流量減少時と
で高応答によるバルブ開閉動作を得ることができ、この
結果、オン・オフ的に消音モードが切り替えられること
により、低流量域での高い消音効果と高流量域でのエン
ジン出力向上効果とを両立する最適設定が可能となる。As described above, the valve opening / closing operation with a high response can be obtained when the flow rate increases and when the flow rate decreases. As a result, the mute mode can be switched on / off, so that the low flow rate range can be obtained. It is possible to make an optimal setting that achieves both a high noise reduction effect and an engine output improvement effect in a high flow rate region.
【0038】次に、効果を説明する。Next, the effects will be described.
【0039】(1)流量感応バルブAを、一端部がマフ
ラ内に開口し他端部が外気に開口している第2排気出力
チューブ19のマフラ内開口端に配置されたバルブ本体
1と、バルブ本体1を開閉回動可能に支持するバルブ軸
2と、バルブ軸2に設けられ、バルブ軸2に対しバルブ
本体1とは反対方向に延設して排気入力チューブ15の
出口部に配置された流量感知部材3とを備え、流量感知
部材3の重力作用点を、バルブ閉方向モーメントが得ら
れるようにバルブ軸2からオフセットして設定し、且
つ、流量感知部材3が受ける排気ガス受圧面積を、バル
ブ全閉時に最小面積で、バルブ開度の増大に伴なって面
積が拡大する設定としたため、電子制御システム等の従
来のマフラ内蔵バルブに比べて低コストでありながら、
高応答のバルブ開閉動作による消音モード切り替えを達
成すると共にバルブ全閉時にバタツキ音や振動の発生が
無い自動車用バルブ内蔵排気マフラを提供することがで
きる。(1) The flow-sensitive valve A is provided with a valve body 1 disposed at an open end in the muffler of the second exhaust output tube 19 having one end opened into the muffler and the other end open to the outside air. A valve shaft 2 that supports the valve body 1 so that it can be opened and closed; and a valve shaft 2 provided on the valve shaft 2. The flow sensing member 3 is provided with an offset point from the valve shaft 2 so that a valve closing moment is obtained, and an exhaust gas receiving pressure area received by the flow sensing member 3 is provided. Is set to have the minimum area when the valve is fully closed, and the area expands as the valve opening increases, so it is lower in cost than conventional valves with built-in mufflers such as electronic control systems.
It is possible to provide an exhaust muffler with a built-in valve for a vehicle, which achieves a silencing mode switching by a high-response valve opening / closing operation and does not generate fluttering noise or vibration when the valve is fully closed.
【0040】(2)バルブ本体1の中央位置に、バルブ
全閉時にマフラ内排気ガスが第2排気出力チューブ19
内に向かって流れる排気ガス流を作り出すガス流孔4を
形成したため、低流量時にバルブ本体1が第2排気出力
チューブ19の開口端に強く密着するバルブ閉状態を得
ることができる。(2) Exhaust gas in the muffler is placed at the center position of the valve body 1 when the valve is fully closed.
Since the gas flow holes 4 for creating the exhaust gas flow flowing inward are formed, it is possible to obtain a valve closed state in which the valve body 1 strongly adheres to the opening end of the second exhaust output tube 19 at a low flow rate.
【0041】(3)流量感知部材3を、バルブ軸2に固
定された支柱部3aと、支柱部3aに一端が固定され、
排気入力チューブ15の内径より少し小さな外径とバル
ブ全閉時に排気ガス受圧面積となる厚みを有する半円筒
形状であり、一部が排気入力チューブ15内に配置され
る流量感知部3bとによって構成したため、排気ガス流
線に沿う形状により排気ガスの流れを乱したり流量低下
を招くことなしに、チューブ内配置により高い流量感知
精度を得ることができる。(3) The flow rate sensing member 3 has a column 3a fixed to the valve shaft 2 and one end fixed to the column 3a.
It has a semi-cylindrical shape having an outer diameter slightly smaller than the inner diameter of the exhaust input tube 15 and a thickness to be an exhaust gas pressure receiving area when the valve is fully closed, and is constituted by a flow rate sensing portion 3 b partially disposed in the exhaust input tube 15. Therefore, a high flow rate sensing accuracy can be obtained by the arrangement in the tube without disturbing the flow of the exhaust gas or reducing the flow rate due to the shape along the exhaust gas flow line.
【0042】(他の実施の形態)実施の形態1では、低
流量時に重力のみでバルブ全閉を得る例を示したが、バ
ルブ軸にバネにより弱いバネ力を付与し、重力と低バネ
力によりバルブ全閉状態を確保する例としても良い。(Other Embodiments) In the first embodiment, an example has been shown in which the valve is fully closed only by gravity when the flow rate is low. However, a weak spring force is applied to the valve shaft by a spring, and gravity and low spring force are applied. May be used to secure the fully closed state of the valve.
【0043】実施の形態1では、流量感知部材として、
半円筒形状で一部が排気入力チューブ内に配置される流
量感知部を有する部材としたが、その形状や配置状態は
実施の形態1に限られるものではなく、排気入力チュー
ブの形状やマフラ内チューブレイアウト等に応じて適宜
変更しても良い。In the first embodiment, as the flow rate sensing member,
Although a member having a semi-cylindrical shape and having a flow rate sensing portion partially disposed in the exhaust input tube is used, the shape and arrangement thereof are not limited to the first embodiment. You may change it suitably according to a tube layout etc.
【0044】実施の形態1では、共に外気に開口連通す
る排気入力チューブと排気出力チューブとの間に流量感
応バルブを設置する例について述べたが、この形態に限
らず排気の入力と出力(あるいは入口と出口)の関係を
持ち外気に開口連通することのないマフラ内部での排気
チューブ間の排気流通回路を切り換える場合にも適用で
きるし、一方が外気開口チューブで一方がマフラ内チュ
ーブの場合にも適用できる。In the first embodiment, an example is described in which the flow rate responsive valve is installed between the exhaust input tube and the exhaust output tube both of which are in open communication with the outside air. However, the present invention is not limited to this embodiment, and the input and output of exhaust (or It can also be applied to the case of switching the exhaust circulation circuit between the exhaust tubes inside the muffler that has a relationship of (inlet and outlet) and does not communicate with the open air to the outside air. Can also be applied.
【0045】[0045]
【発明の効果】請求項1記載の発明にあっては、排気流
量の増減に伴って開閉動作する流量感応バルブがマフラ
内チューブの端部位置に設けられた自動車用バルブ内蔵
排気マフラにおいて、流量感応バルブを、一端部がマフ
ラ内に開口し他端部が外気もしくはマフラ内に開口して
いる排気出力チューブのマフラ内開口端に配置されたバ
ルブ本体と、バルブ本体を開閉回動可能に支持するバル
ブ軸と、バルブ軸に設けられ、バルブ軸に対しバルブ本
体とは反対方向に延設して排気入力チューブの出口部に
配置された流量感知部材とを備え、流量感知部材の重力
作用点を、バルブ閉方向モーメントが得られるようにバ
ルブ軸からオフセットして設定し、且つ、流量感知部材
が受ける排気ガス受圧面積を、バルブ全閉時に最小面積
で、バルブ開度の増大に伴なって面積が拡大する設定と
しため、低コストでありながら、高応答のバルブ開閉動
作による消音モード切り替えを達成すると共にバルブ全
閉時にバタツキ音や振動の発生が無い自動車用バルブ内
蔵排気マフラを提供することことができる。According to the first aspect of the present invention, there is provided an exhaust muffler with a built-in valve for a vehicle, wherein a flow sensing valve which opens and closes in accordance with an increase or decrease of the exhaust flow is provided at an end position of a tube inside the muffler. The sensitive valve has a valve body located at the open end inside the muffler of the exhaust output tube, one end of which opens into the muffler and the other end opens to the outside air or muffler, and the valve body is opened and closed rotatably. A valve shaft, and a flow sensing member provided on the valve shaft, extending in a direction opposite to the valve body with respect to the valve shaft, and disposed at an outlet of the exhaust input tube. Is set to be offset from the valve axis so as to obtain a valve closing direction moment, and the exhaust gas receiving pressure area received by the flow rate sensing member is the minimum area when the valve is fully closed, and the valve opening degree is Since the area is enlarged as the size increases, the low-cost, high-response valve opening / closing operation switches to the mute mode, and there is no flapping noise or vibration when the valve is fully closed. A muffler can be provided.
【0046】請求項2記載の発明にあっては、請求項1
記載の自動車用バルブ内蔵排気マフラにおいて、バルブ
本体の中央位置に、バルブ全閉時にマフラ内排気ガスが
排気出力チューブ内に向かって流れる排気ガス流を作り
出すガス流孔を形成したため、請求項1記載の発明の効
果に加え、低流量時にバルブ本体が排気出力チューブの
開口端に強く密着するバルブ閉状態を得ることができ
る。In the invention according to claim 2, claim 1
2. The exhaust muffler with a built-in valve for a vehicle according to claim 1, wherein a gas flow hole for creating an exhaust gas flow in which exhaust gas in the muffler flows toward the inside of the exhaust output tube when the valve is fully closed is formed at a central position of the valve body. In addition to the effects of the invention described above, it is possible to obtain a valve closed state in which the valve body strongly adheres to the open end of the exhaust output tube at a low flow rate.
【0047】請求項3記載の発明にあっては、請求項1
または請求項2記載の自動車用バルブ内蔵排気マフラに
おいて、流量感知部材を、バルブ軸に固定された支柱部
と、支柱部に一端が固定され、排気入力チューブの内径
より少し小さな外径とバルブ全閉時に排気ガス受圧面積
となる厚みを有する半円筒形状であり、一部が排気入力
チューブ内に配置される流量感知部とによって構成した
ため、請求項1または請求項2記載の発明の効果に加
え、排気ガス流線に沿う形状により排気ガスの流れを乱
したり流量低下を招くことなしに、チューブ内配置によ
り高い流量感知精度を得ることができる。In the invention according to claim 3, claim 1
The exhaust muffler with a built-in valve for a vehicle according to claim 2, wherein the flow rate sensing member comprises a support fixed to the valve shaft, one end fixed to the support, an outer diameter slightly smaller than the inner diameter of the exhaust input tube, and the entire valve. A semi-cylindrical shape having a thickness that becomes an exhaust gas receiving pressure area when closed, and a part thereof is constituted by a flow rate sensing portion arranged in the exhaust input tube, so that in addition to the effects of the invention described in claim 1 or 2, In addition, a high flow rate sensing accuracy can be obtained by disposing in the tube without disturbing the flow of the exhaust gas or reducing the flow rate due to the shape along the exhaust gas flow line.
【図1】実施の形態1の自動車用バルブ内蔵排気マフラ
の流量感応バルブを示す分解斜視図である。FIG. 1 is an exploded perspective view showing a flow-sensitive valve of an exhaust muffler with a built-in automotive valve according to a first embodiment.
【図2】実施の形態1の自動車用バルブ内蔵排気マフラ
の流量感応バルブを示す正面図である。FIG. 2 is a front view showing a flow-sensitive valve of the exhaust muffler with a built-in valve for a vehicle according to the first embodiment;
【図3】実施の形態1の自動車用バルブ内蔵排気マフラ
を示す全体断面図である。FIG. 3 is an overall sectional view showing an exhaust muffler with a built-in valve for a vehicle according to the first embodiment;
【図4】実施の形態1の流量感応バルブのバルブ閉状態
を示す作用説明図である。FIG. 4 is an operation explanatory view showing a valve closed state of the flow rate sensitive valve according to the first embodiment.
【図5】実施の形態1の流量感応バルブのバルブ開状態
を示す作用説明図である。FIG. 5 is an operation explanatory view showing a valve open state of the flow rate sensitive valve according to the first embodiment.
【図6】従来の排気マフラ内蔵バルブを示す斜視図であ
る。FIG. 6 is a perspective view showing a conventional exhaust muffler built-in valve.
A 流量感応バルブ 1 バルブ本体 2 バルブ軸 3 流量感知部材 3a 支柱部 3b 流量感知部 4 ガス流孔 5 軸支持ブラケット 14 第2バッフルプレート 15 排気入力チューブ 19 第2排気出力チューブ A Flow Sensitive Valve 1 Valve Body 2 Valve Shaft 3 Flow Sensing Member 3a Support 3b Flow Sensing Part 4 Gas Flow Hole 5 Shaft Support Bracket 14 Second Baffle Plate 15 Exhaust Input Tube 19 Second Exhaust Output Tube
Claims (3)
量感応バルブ(A)がマフラ内チューブの端部位置に設
けられた自動車用バルブ内蔵排気マフラにおいて、 前記流量感応バルブ(A)を、 一端部がマフラ内に開口し他端部が外気もしくはマフラ
内に開口している排気出力チューブ(19)のマフラ内
開口端に配置されたバルブ本体(1)と、 前記バルブ本体(1)を開閉回動可能に支持するバルブ
軸(2)と、 前記バルブ軸(2)に設けられ、バルブ軸(2)に対し
バルブ本体(1)とは反対方向に延設して排気入力チュ
ーブ(15)の出口部に配置された流量感知部材(3)
とを備え、 前記流量感知部材(3)の重力作用点を、バルブ閉方向
モーメントが得られるようにバルブ軸(2)からオフセ
ットして設定し、且つ、流量感知部材(3)が受ける排
気ガス受圧面積を、バルブ全閉時に最小面積で、バルブ
開度の増大に伴なって面積が拡大する設定としたことを
特徴とする自動車用バルブ内蔵排気マフラ。1. An exhaust muffler with a built-in valve for a vehicle, wherein a flow responsive valve (A) that opens and closes in accordance with an increase or decrease in an exhaust flow rate is provided at an end position of an inner tube of a muffler. A valve body (1) disposed at an open end inside the muffler of an exhaust output tube (19) having one end opened into the muffler and the other end open to the outside air or the muffler; A valve shaft (2) supported to be openable and closable; and an exhaust input tube (15) provided on the valve shaft (2), extending in a direction opposite to the valve body (1) with respect to the valve shaft (2). (3) Flow rate sensing member arranged at the outlet of (3)
Wherein the gravitational action point of the flow rate sensing member (3) is set offset from the valve shaft (2) so as to obtain a valve closing moment, and the exhaust gas received by the flow rate sensing member (3) is provided. An exhaust muffler with a built-in valve for an automobile, wherein the pressure receiving area is set to a minimum area when the valve is fully closed, and the area is increased as the valve opening increases.
マフラにおいて、 前記バルブ本体(1)の中央位置に、バルブ全閉時にマ
フラ内排気ガスが排気出力チューブ(19)内に向かっ
て流れる排気ガス流を作り出すガス流孔(4)を形成し
たことを特徴とする自動車用バルブ内蔵排気マフラ。2. The exhaust muffler according to claim 1, wherein the exhaust gas in the muffler flows toward the exhaust output tube (19) at a center position of the valve body (1) when the valve is fully closed. An exhaust muffler with a built-in valve for a vehicle, wherein a gas flow hole (4) for creating a gas flow is formed.
バルブ内蔵排気マフラにおいて、 前記流量感知部材(3)を、バルブ軸(2)に固定され
た支柱部(3a)と、支柱部(3a)に一端が固定さ
れ、排気入力チューブ(15)の内径より少し小さな外
径とバルブ全閉時に排気ガス受圧面積となる厚みを有す
る半円筒形状であり、一部が排気入力チューブ(15)
内に配置される流量感知部(3b)とによって構成した
ことを特徴とする自動車用バルブ内蔵排気マフラ。3. The exhaust muffler with a built-in valve for a vehicle according to claim 1, wherein the flow rate sensing member (3) includes a support (3a) fixed to a valve shaft (2), and a support (3). 3a) has a semi-cylindrical shape, one end of which is fixed to an outer diameter slightly smaller than the inner diameter of the exhaust input tube (15) and a thickness which becomes an exhaust gas receiving pressure area when the valve is fully closed, and a part of which is an exhaust input tube (15).
An exhaust muffler with a built-in valve for a vehicle, characterized by comprising a flow sensor (3b) disposed in the interior.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11374897A JP3748313B2 (en) | 1997-05-01 | 1997-05-01 | Exhaust muffler with built-in valve for automobile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11374897A JP3748313B2 (en) | 1997-05-01 | 1997-05-01 | Exhaust muffler with built-in valve for automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10299453A true JPH10299453A (en) | 1998-11-10 |
JP3748313B2 JP3748313B2 (en) | 2006-02-22 |
Family
ID=14620133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11374897A Expired - Fee Related JP3748313B2 (en) | 1997-05-01 | 1997-05-01 | Exhaust muffler with built-in valve for automobile |
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JP (1) | JP3748313B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2357631A (en) * | 1999-12-22 | 2001-06-27 | Hans Bernhard Linden | Ionisation of analyte substances using dendrites |
EP1296027A3 (en) * | 2001-09-25 | 2004-02-04 | J. Eberspächer GmbH & Co. KG | Exhaust gas muffler |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101526380B1 (en) * | 2009-12-03 | 2015-06-08 | 현대자동차 주식회사 | Exhaust system of engine |
-
1997
- 1997-05-01 JP JP11374897A patent/JP3748313B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2357631A (en) * | 1999-12-22 | 2001-06-27 | Hans Bernhard Linden | Ionisation of analyte substances using dendrites |
EP1296027A3 (en) * | 2001-09-25 | 2004-02-04 | J. Eberspächer GmbH & Co. KG | Exhaust gas muffler |
Also Published As
Publication number | Publication date |
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JP3748313B2 (en) | 2006-02-22 |
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