JPH1150863A - Throttle valve - Google Patents
Throttle valveInfo
- Publication number
- JPH1150863A JPH1150863A JP21174197A JP21174197A JPH1150863A JP H1150863 A JPH1150863 A JP H1150863A JP 21174197 A JP21174197 A JP 21174197A JP 21174197 A JP21174197 A JP 21174197A JP H1150863 A JPH1150863 A JP H1150863A
- Authority
- JP
- Japan
- Prior art keywords
- butterfly valve
- valve
- throttle valve
- throttle
- air passage
- 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
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Lift Valve (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転軸に支持した
バタフライバルブをスロットルボディに形成した空気通
路の内部に揺動自在に配置し、全閉状態でのバタフライ
バルブの外周部と空気通路の内周面との間に隙間を形成
してなるスロットルバルブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve, which is supported on a rotating shaft, and is swingably disposed inside an air passage formed in a throttle body. The present invention relates to a throttle valve having a gap formed between the throttle valve and an inner peripheral surface.
【０００２】[0002]
【従来の技術】図１０に示す従来のスロットルバルブ
は、バタフライバルブ０１が回転軸０２を介してスロッ
トルボディ０３の内部に揺動自在に支持されており、バ
タフライバルブ０１が図示した全閉位置にあるとき、そ
の外周部とスロットルボディ３の空気通路の内周面との
間に隙間αが形成される。かかるスロットルバルブにお
いて、そのスロットルボディ０３を合成樹脂で構成した
ものが、特開平９−４９４４３号公報により公知であ
る。2. Description of the Related Art In a conventional throttle valve shown in FIG. 10, a butterfly valve 01 is swingably supported inside a throttle body 03 via a rotary shaft 02, and the butterfly valve 01 is moved to a fully closed position shown in the drawing. At some point, a gap α is formed between the outer peripheral portion and the inner peripheral surface of the air passage of the throttle body 3. Such a throttle valve in which the throttle body 03 is made of a synthetic resin is known from Japanese Patent Application Laid-Open No. 9-49443.
【０００３】[0003]
【発明が解決しようとする課題】ところで、バタフライ
バルブ０１を単純な平板で構成すると、前記隙間αを通
過した気流がバタフライバルブ０１の壁面に沿って半径
方向内側に回り込み、そこに渦流が発生して気流音の原
因となる問題があった、スロットルバルブが閉じられる
エンジンのアイドリング運転時にはエンジン自体の騒音
が小さいため、バタフライバルブ０１の全周に形成され
る隙間αから気流音が発生すると、その気流音が耳障り
になる場合があった。特に、スロットルボディ０３を合
成樹脂で構成すると、前記気流音がスロットルボディ０
３を透過して乗員に達し易くなる問題があった。By the way, if the butterfly valve 01 is formed of a simple flat plate, the air flow passing through the gap α goes radially inward along the wall surface of the butterfly valve 01, and a vortex is generated there. When the idling operation of the engine with the throttle valve closed is low, there is a problem that causes airflow noise.When the airflow noise is generated from the gap α formed on the entire circumference of the butterfly valve 01, The sound of air currents was sometimes harsh. In particular, when the throttle body 03 is made of a synthetic resin, the airflow noise is reduced by the throttle body 0.
There was a problem that the vehicle could easily reach the occupant through the 3.
【０００４】本発明は前述の事情に鑑みてなされたもの
で、スロットルバルブのバタフライバルブの外周部の隙
間を通過する空気の気流音を低減することを目的とす
る。[0004] The present invention has been made in view of the above circumstances, and has as its object to reduce the noise of air flowing through a gap in the outer peripheral portion of a butterfly valve of a throttle valve.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するため
に、請求項１に記載された発明は、回転軸に支持したバ
タフライバルブをスロットルボディに形成した空気通路
の内部に揺動自在に配置し、全閉状態でのバタフライバ
ルブの外周部と空気通路の内周面との間に隙間を形成し
てなるスロットルバルブにおいて、前記バタフライバル
ブの外周部の少なくとも一部に、気流の流れ方向下流側
に膨らむ凸部を形成したことを特徴とする。In order to achieve the above object, according to the first aspect of the present invention, a butterfly valve supported on a rotary shaft is swingably disposed inside an air passage formed in a throttle body. In a throttle valve in which a gap is formed between the outer peripheral portion of the butterfly valve and the inner peripheral surface of the air passage in the fully closed state, at least a part of the outer peripheral portion of the butterfly valve is downstream of the air flow direction. A convex portion bulging to the side is formed.
【０００６】上記構成によれば、全閉状態にあるバタフ
ライバルブの外周部と空気通路の内周面との間に形成さ
れた隙間を通過した空気は、バタフライバルブの外周部
の気流の流れ方向下流側に形成された凸部に案内されて
渦流を発生することなくスムーズに流れるため、気流音
の発生が防止される。According to the above configuration, the air passing through the gap formed between the outer peripheral portion of the butterfly valve and the inner peripheral surface of the air passage in the fully closed state is subjected to the flow direction of the airflow in the outer peripheral portion of the butterfly valve. Since the air flows smoothly without being swirled by being guided by the convex portion formed on the downstream side, generation of airflow noise is prevented.
【０００７】また請求項２に記載された発明は、請求項
１の構成に加えて、前記スロットルバルブを車両のエン
ジンルームに搭載した状態で、全閉状態にあるバタフラ
イバルブの前記凸部を上側あるいは車室側に配置したこ
とを特徴とする。According to a second aspect of the present invention, in addition to the configuration of the first aspect, in a state where the throttle valve is mounted in an engine room of a vehicle, the convex portion of the butterfly valve in a fully closed state is raised. Alternatively, it is characterized in that it is arranged on the vehicle compartment side.
【０００８】上記構成によれば、バタフライバルブの気
流音を発生しない部分が上側あるいは車室側に配置され
るので、ドライバーが体感する気流音を効果的に低減す
ることができる。[0008] According to the above configuration, the portion of the butterfly valve that does not generate airflow noise is disposed on the upper side or the cabin side, so that the airflow noise experienced by the driver can be effectively reduced.
【０００９】また請求項３に記載された発明は、回転軸
に支持したバタフライバルブをスロットルボディに形成
した空気通路の内部に揺動自在に配置し、全閉状態での
バタフライバルブの外周部と空気通路の内周面との間に
隙間を形成してなるスロットルバルブにおいて、前記バ
タフライバルブの外周部の少なくとも一部を、気流の流
れ方向下流側に凸に湾曲させたことを特徴とする。According to a third aspect of the present invention, a butterfly valve supported on a rotating shaft is swingably disposed inside an air passage formed in a throttle body, and the butterfly valve and the outer peripheral portion of the butterfly valve in a fully closed state. In a throttle valve having a gap formed with an inner peripheral surface of an air passage, at least a part of an outer peripheral portion of the butterfly valve is curved so as to protrude downstream in an airflow direction.
【００１０】上記構成によれば、全閉状態にあるバタフ
ライバルブの外周部と空気通路の内周面との間に形成さ
れた隙間を通過した空気は、バタフライバルブの外周部
の気流の流れ方向下流側の凸曲面に案内されて渦流を発
生することなくスムーズに流れるため、気流音の発生が
防止される。According to the above configuration, the air that has passed through the gap formed between the outer peripheral portion of the butterfly valve and the inner peripheral surface of the air passage in the fully closed state flows in the airflow direction of the outer peripheral portion of the butterfly valve. Since the air flows smoothly without being swirled by being guided by the convex curved surface on the downstream side, generation of airflow noise is prevented.
【００１１】また請求項４に記載された発明は、請求項
３の構成に加えて、前記スロットルバルブを車両のエン
ジンルームに搭載した状態で、全閉状態にあるバタフラ
イバルブの前記湾曲部を上側あるいは車室側に配置した
ことを特徴とする。According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, when the throttle valve is mounted in an engine room of a vehicle, the curved portion of the butterfly valve in a fully closed state is raised. Alternatively, it is characterized in that it is arranged on the vehicle compartment side.
【００１２】上記構成によれば、バタフライバルブの気
流音を発生しない部分が上側あるいは車室側に配置され
るので、ドライバーが体感する気流音を効果的に低減す
ることができる。According to the above configuration, the portion of the butterfly valve that does not generate airflow noise is arranged on the upper side or the vehicle interior, so that the airflow noise experienced by the driver can be effectively reduced.
【００１３】また請求項５に記載された発明は、請求項
１の構成に加えて、前記バタフライバルブの湾曲部の湾
曲方向内面にリブを設けたことを特徴とする。According to a fifth aspect of the present invention, in addition to the configuration of the first aspect, a rib is provided on an inner surface in a bending direction of a bending portion of the butterfly valve.
【００１４】上記構成によれば、バタフライバルブの剛
性をリブによって効果的に高めることができる。According to the above configuration, the rigidity of the butterfly valve can be effectively increased by the rib.
【００１５】また請求項６に記載された発明は、回転軸
に支持したバタフライバルブをスロットルボディに形成
した空気通路の内部に揺動自在に配置し、全閉状態での
バタフライバルブの外周部と空気通路の内周面との間に
隙間を形成してなるスロットルバルブにおいて、前記バ
タフライバルブの気流に対向する面に、気流の上流側か
ら下流側に向けて間隔が狭まる複数のリブを形成したこ
とを特徴とする。According to a sixth aspect of the present invention, a butterfly valve supported on a rotating shaft is swingably disposed inside an air passage formed in a throttle body, and the butterfly valve is provided in a fully closed state with an outer peripheral portion of the butterfly valve. In a throttle valve having a gap formed with an inner peripheral surface of an air passage, a plurality of ribs whose intervals narrow from upstream to downstream of the airflow are formed on a surface of the butterfly valve facing the airflow. It is characterized by the following.
【００１６】上記構成によれば、回転軸の近傍の隙間は
バタフライバルブが開状態になっても消滅せずに気流音
の原因となるが、バタフライバルブの気流に対向する面
に形成した上流側から下流側に向けて間隔が狭まる複数
のリブにより、前記回転軸の近傍の隙間に向かって気流
が流れないようにして気流音の発生を防止することがで
きる。According to the above configuration, the gap near the rotary shaft does not disappear even when the butterfly valve is opened, and causes airflow noise. However, the upstream side formed on the surface of the butterfly valve opposed to the airflow. With the plurality of ribs having a narrower interval from the downstream side to the downstream side, it is possible to prevent the airflow from flowing toward the gap near the rotation shaft, thereby preventing the generation of the airflow noise.
【００１７】また請求項７に記載された発明は、回転軸
に支持したバタフライバルブをスロットルボディに形成
した空気通路の内部に揺動自在に配置し、全閉状態での
バタフライバルブの外周部と空気通路の内周面との間に
隙間を形成してなるスロットルバルブにおいて、前記空
気通路の内周面であって、全閉状態にあるバタフライバ
ルブの外周部の気流の流れ方向下流位置に凹部を形成し
たことを特徴とする。According to a seventh aspect of the present invention, a butterfly valve supported on a rotary shaft is swingably disposed inside an air passage formed in a throttle body, and the butterfly valve and the outer peripheral portion of the butterfly valve in a fully closed state are provided. In the throttle valve having a gap formed between itself and the inner peripheral surface of the air passage, a concave portion is provided on the inner peripheral surface of the air passage at a position downstream of the outer peripheral portion of the butterfly valve in the fully closed state in the airflow direction. Is formed.
【００１８】上記構成によれば、全閉状態にあるバタフ
ライバルブの外周部と空気通路の内周面との間に形成さ
れた隙間を通過した空気は、空気通路の内周面に形成さ
れた凹部に案内されて渦流を発生することなくスムーズ
に流れるため、気流音の発生が防止される。According to the above construction, the air passing through the gap formed between the outer peripheral portion of the butterfly valve and the inner peripheral surface of the air passage in the fully closed state is formed on the inner peripheral surface of the air passage. Since the air flows smoothly without being swirled by being guided by the recess, generation of airflow noise is prevented.
【００１９】また請求項８に記載された発明は、請求項
１〜７の何れかの構成に加えて、前記回転軸をバタフラ
イバルブの内部に埋設したことを特徴とする。According to an eighth aspect of the present invention, in addition to any one of the first to seventh aspects, the rotary shaft is embedded in a butterfly valve.
【００２０】上記構成によれば、バタフライバルブが開
弁状態にあってその表面に沿って空気が流れるとき、回
転軸が空気の流れを乱すのを抑制して気流音の発生を一
層効果的に防止することができる。According to the above construction, when air flows along the surface of the butterfly valve in the open state, the rotation shaft is suppressed from disturbing the air flow, and the generation of airflow noise is more effectively achieved. Can be prevented.
【００２１】[0021]
【発明の実施例の形態】以下、本発明の実施の形態を、
添付図面に示した本発明の実施例に基づいて説明する。Embodiments of the present invention will be described below.
A description will be given based on an embodiment of the present invention shown in the accompanying drawings.
【００２２】図１および図２は本発明の第１実施例を示
すもので、図１はスロットルバルブの縦断面図、図２は
図１の２−２線断面図である。1 and 2 show a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a throttle valve, and FIG. 2 is a sectional view taken along line 2-2 of FIG.
【００２３】スロットルバルブＶは、バタフライバルブ
１、回転軸２およびスロットルボディ３を備えてなり、
円板形状を有する合成樹脂製のバタフライバルブ１の直
径に対応する部分に回転軸２の中央部が埋設される。円
筒形状を有する合成樹脂製のスロットルボディ３の壁面
に前記回転軸２の両端部を支持することにより、バタフ
ライバルブ１がスロットルボディ３の内部に揺動自在に
支持される。バタフライバルブ１は実線で示す全閉位置
と鎖線で示す全開位置との間を略９０°に亘って揺動可
能であり、全閉位置にあるバタフライバルブ１の外周部
とスロットルボディ３の空気通路３1 の内周面との間に
微小な隙間αが形成される。図１に矢印で示す気流の流
れ方向に対して、バタフライバルブ１の上流側面４は平
坦に形成されているが、下流側面５は平坦でなく、その
外周部に沿って気流の流れ方向下流側に膨らむ凸部６が
形成される。The throttle valve V includes a butterfly valve 1, a rotating shaft 2, and a throttle body 3.
A central portion of the rotary shaft 2 is embedded in a portion corresponding to the diameter of the butterfly valve 1 made of a synthetic resin having a disk shape. By supporting both ends of the rotary shaft 2 on the wall surface of a cylindrical synthetic resin throttle body 3, the butterfly valve 1 is swingably supported inside the throttle body 3. The butterfly valve 1 is swingable by approximately 90 ° between a fully closed position indicated by a solid line and a fully opened position indicated by a chain line, and an outer peripheral portion of the butterfly valve 1 at the fully closed position and an air passage of the throttle body 3. A minute gap α is formed between the inner peripheral surface of the first and the inner peripheral surface 31. The upstream side surface 4 of the butterfly valve 1 is formed flat with respect to the flow direction of the airflow indicated by the arrow in FIG. 1, but the downstream side surface 5 is not flat, and the downstream side in the flow direction of the airflow along the outer peripheral portion. The convex portion 6 swelling is formed.
【００２４】而して、バタフライバルブ１の全閉時に該
バタフライバルブ１の外周部とスロットルボディ３の内
周面との間の隙間αを通って空気が流れるとき、隙間α
を通過した空気はバタフライバルブ１の下流側面５の凸
部６に沿って滑らかに流れるため、渦流による気流音の
発生が防止される。When air flows through the clearance α between the outer peripheral portion of the butterfly valve 1 and the inner peripheral surface of the throttle body 3 when the butterfly valve 1 is fully closed, the clearance α
The air that has passed through flows smoothly along the convex portion 6 of the downstream side surface 5 of the butterfly valve 1, so that the generation of airflow noise due to the vortex is prevented.
【００２５】図３および図４は本発明の第２実施例を示
すもので、図３はスロットルバルブの縦断面図、図４は
図３の４−４線断面図である。FIGS. 3 and 4 show a second embodiment of the present invention. FIG. 3 is a longitudinal sectional view of the throttle valve, and FIG. 4 is a sectional view taken along line 4-4 of FIG.
【００２６】第２実施例のスロットルバルブＶは、バタ
フライバルブ１を回転軸２の軸線方向に見たとき、バタ
フライバルブ１の回転軸２から遠い部分が気流の流れ方
向下流側に凸に湾曲している。そして湾曲方向内側にな
るバタフライバルブ１の上流側面４に気流の流れ方向に
沿う複数本のリブ７…が平行に形成される。In the throttle valve V of the second embodiment, when the butterfly valve 1 is viewed in the axial direction of the rotary shaft 2, a portion far from the rotary shaft 2 of the butterfly valve 1 is curved so as to protrude downstream in the air flow direction. ing. A plurality of ribs 7 are formed in parallel on the upstream side surface 4 of the butterfly valve 1 which is on the inner side in the bending direction along the flow direction of the air flow.
【００２７】この第２実施例によれば、バタフライバル
ブ１の全閉時に隙間αを通過した空気は、凸曲面である
下流側面５に沿って滑らかに流れるため、渦流による気
流音の発生が防止される。また凹曲面である上流側面４
に複数本のリブ７…を形成したので、そのリブ７…を凸
曲面である下流側面５に設ける場合に比べて、バタフラ
イバルブ１の強度を効果的に高めることができ、しかも
前記リブ７…は気流の流れ方向に沿って形成されるの
で、空気の流通抵抗を増加させることがない。According to the second embodiment, the air that has passed through the gap α when the butterfly valve 1 is fully closed flows smoothly along the downstream side surface 5 that is a convex curved surface, so that the generation of airflow noise due to the vortex is prevented. Is done. The upstream side surface 4 which is a concave surface
, The strength of the butterfly valve 1 can be effectively increased as compared with the case where the ribs 7 are provided on the downstream side surface 5 which is a convex curved surface. Is formed along the flow direction of the airflow, so that the flow resistance of the air does not increase.
【００２８】図５〜図７は本発明の第３実施例を示すも
ので、図５はスロットルバルブの縦断面図、図６は図５
の６−６線断面図、図７は図５の要部拡大図である。5 to 7 show a third embodiment of the present invention. FIG. 5 is a longitudinal sectional view of a throttle valve, and FIG.
FIG. 7 is an enlarged view of a main part of FIG.
【００２９】第３実施例のスロットルバルブＶは、回転
軸２の軸線方向に見たバタフライバルブ１がＳ字状に湾
曲している。従って、回転軸２から一方に延びるバタフ
ライバルブ１の第１半体１1 は下流側面５1 側に凸に湾
曲し、回転軸２から他方に延びるバタフライバルブ１の
第２半体１2 は上流側面４2 側に凸に湾曲する。第１半
体１1 の凹曲面である上流側面４1 および第２半体１2
の凹曲面である下流側面５2 にはそれぞれ複数のリブ８
…，９…が形成されるが、第２半体１2 のリブ９…が気
流の流れ方向に沿って形成されるのに対し、第１半体１
1 のリブ８…は気流の流れ方向下流側が相互に接近する
ように傾斜して形成される。合成樹脂製のバタフライバ
ルブ１は、中央部に面取り２1 ，２1 を施した金属製の
回転軸２を覆うように射出成形され、更にボルト１０に
よって回転軸２に固定される。In the throttle valve V of the third embodiment, the butterfly valve 1 as viewed in the axial direction of the rotating shaft 2 is curved in an S-shape. Thus, the first half 1 1 of the butterfly valve 1 extending one from the rotating shaft 2 is curved convexly downstream face 5 1 side, the second half 1 2 butterfly valve 1 extending from the rotating shaft 2 on the other upstream It curved convexly on the side surface 4 2 side. The first half 1 1 of the upstream side 4 1 and second halves 1 2 is a concave surface
Ribs 8 each of the downstream side face 5 2 is a concave curved surface of the
..., 9 ... but is formed, while the second half 1 2 ribs 9 ... are formed along the direction of the airflow, the first half 1
The one rib 8 is formed so as to be inclined so that the downstream side in the flow direction of the air flow approaches each other. The butterfly valve 1 made of synthetic resin is injection-molded so as to cover a metal rotary shaft 2 having a chamfered 2 1 , 2 1 at the center, and is further fixed to the rotary shaft 2 by bolts 10.
【００３０】而して、バタフライバルブ１の第１半体１
1 が気流の流れ方向下流側に凸に湾曲しているため、そ
の第１半体１1 の外周の隙間αを通過した気流は、凸曲
面である下流側面５1 において渦流となることないため
に気流音の発生が防止される。一方、バタフライバルブ
１の第２半体１2 は気流の流れ方向上流側に凸に湾曲し
ているため、その第２半体１2 の外周の隙間αを通過し
た気流は、凹曲面である下流側面５2 において渦流とな
って気流音が発生する。しかしながら、エンジンルーム
内におけるスロットルバルブＶのレイアウトを工夫する
ことにより、気流音の影響を緩和することができる。具
体的には、気流音が発生しないバタフライバルブ１の第
１半体１1 を上側（ボンネットに対向する側）に配置
し、気流音が発生するバタフライバルブ１の第２半体１
2 を下側（路面に対向する側）に配置することにより、
あるいは気流音が発生しないバタフライバルブ１の第１
半体１1 を車室側に配置し、気流音が発生するバタフラ
イバルブ１の第２半体１2 を車室から離れた反車室側に
配置することにより、ドライバーが体感する気流音を軽
減することができる。Thus, the first half 1 of the butterfly valve 1
Since 1 is curved convexly in the direction of flow downstream of the air flow, the air flow gap has passed through the α of the first half 1 1 of the outer circumference, since not a swirl in the downstream face 5 1 a convex surface The generation of airflow noise is prevented. Meanwhile, since the second half 1 2 butterfly valve 1 is curved convexly in the direction of flow upstream of the airflow, the airflow which has passed through the gap α of the second half 1 2 of the outer circumference is a concave curved surface gas flow noise occurs becomes vortex in the downstream face 5 2. However, by devising the layout of the throttle valve V in the engine room, the influence of the airflow noise can be reduced. Specifically, to place the first half 1 1 of the butterfly valve 1 the airflow sound is not generated in the upper side (the side facing the hood), a second half first butterfly valve 1 the airflow sound is generated
By placing 2 on the lower side (the side facing the road surface),
Alternatively, the first of the butterfly valve 1 in which no airflow noise is generated
Place half 1 1 in the vehicle compartment side, by arranging the counter-cabin side leaving the second half 1 2 butterfly valve 1 from the cabin air flow sound is generated, the driver felt flow noise Can be reduced.
【００３１】この第３実施例においても、バタフライバ
ルブ１の湾曲方向内側に、即ち第１半体１1 の上流側面
４1 にリブ８…を形成し、第２半体１2 の下流側面５2
にリブ９…を形成したので、バタフライバルブ１の剛性
が高められる。また回転軸２がバタフライバルブ１の内
部に埋設されているので、バタフライバルブ１の表面か
らの回転軸２の突出を防止することができる。その結
果、エンジンの高速運転時にバタフライバルブ１が気流
の流れ方向と略平行になったとき、回転軸２の突出によ
る気流の乱れを抑制して気流音の軽減に寄与することが
できる。[0031] Also in the third embodiment, the curved inward of the butterfly valve 1, i.e. on the upstream side 4 of the first half 1 1 to form a rib 8 ..., second half 1 2 downstream side 5 Two
Are formed, the rigidity of the butterfly valve 1 is increased. Further, since the rotating shaft 2 is embedded inside the butterfly valve 1, it is possible to prevent the rotating shaft 2 from projecting from the surface of the butterfly valve 1. As a result, when the butterfly valve 1 becomes substantially parallel to the flow direction of the airflow during high-speed operation of the engine, the turbulence of the airflow due to the protrusion of the rotating shaft 2 can be suppressed, and the airflow noise can be reduced.
【００３２】ところで、図１に示すように、バタフライ
バルブ１の開度を増加させると、回転軸２から離れた部
分では空気通路３1 の内周面との間の隙間αが急激に増
加して気流音が発生しなくなるのに対し、回転軸２の近
傍では前記隙間αの大きさが殆ど変化しないため、その
回転軸２の近傍の隙間αを通過する空気により気流音が
発生する問題がある。しかしながら、本実施例では回転
軸２の上流側の第１半体１1 の上流側面４1 に設けられ
たリブ８…が、気流の流れ方向下流側が相互に接近する
ように傾斜しているので、開弁時に気流が前記回転軸２
の近傍の隙間αを通過しないように案内して気流音の発
生を防止することができる。[0032] Incidentally, as shown in FIG. 1, increasing the degree of opening of the butterfly valve 1, the gap α is rapidly increased during the portion remote from the rotary shaft 2 and the inner circumferential surface of the air passage 3 1 However, since the size of the gap α hardly changes in the vicinity of the rotating shaft 2, there is a problem that airflow noise is generated by air passing through the gap α in the vicinity of the rotating shaft 2. is there. However, the ribs 8 ... provided on the upstream face 4 of the first half 1 1 of the upstream side of the rotary shaft 2 in the present embodiment, since the flow direction downstream side of the air flow is inclined so as to approach to each other When the valve is opened, the airflow is
Is guided so as not to pass through the gap α in the vicinity of.
【００３３】次に、図８に基づいて本発明の第４実施例
を説明する。Next, a fourth embodiment of the present invention will be described with reference to FIG.
【００３４】第４実施例のバタフライバルブ１は比較的
に肉厚の板体から構成されており、その内部に回転軸２
を埋設することにより、該回転軸２による気流への影響
を完全に防止している。また第１半体１1 の下流側面５
1 の外周部および第２半体１ 2 の上流側面４2 の外周部
にそれぞれ凸部１１，１２が形成されており、そのうち
第１半体１1 の下流側面５1 の凸部１１により渦流の発
生を抑制して気流音を防止している。他方の凸部１２は
上流側面４2 に設けられているので気流音の防止には寄
与しないが、前述した第３実施例と同様に、気流音の発
生源となるバタフライバルブ１の第２半体１2 を下側あ
るいは反車室側に向けて配置することにより、ドライバ
ーが体感する気流音を軽減することができる。The butterfly valve 1 of the fourth embodiment is relatively
And a rotating shaft 2 inside the plate.
The influence of the rotating shaft 2 on the airflow
Is completely prevented. Also the first half 11Downstream side 5 of
1Outer periphery and second half 1 TwoUpstream side 4TwoOuter circumference
Are formed with convex portions 11 and 12, respectively.
First half 11Downstream side 5 of1Of eddy current by the convex part 11
It suppresses air flow and prevents airflow noise. The other convex part 12
Upstream side 4TwoTo prevent airflow noise.
However, as in the third embodiment described above, the airflow sound is emitted.
Second half 1 of butterfly valve 1, which is the sourceTwoThe lower side
Or, by positioning it toward the passenger compartment side,
This can reduce the airflow sound experienced by the driver.
【００３５】次に、図９に基づいて本発明の第５実施例
を説明する。Next, a fifth embodiment of the present invention will be described with reference to FIG.
【００３６】第５実施例のバタフライバルブ１は従来例
と同じ平板から構成されているが、その閉弁時にバタフ
ライバルブ１の外周部が対向するスロットルボディ３の
空気通路３1 の内周面に、前記外周部から気流の流れ方
向下流に延びる曲面形状の凹部３2 が環状に形成され
る。その結果、気流が前記凹部３2 に沿うように半径方
向外側に引かれるため、気流が半径方向内側に回り込ん
で渦流が発生することがなくなり、気流音の発生が防止
される。The butterfly valve 1 of the fifth embodiment is composed of the same flat plate in the conventional example, but the inner peripheral surface of the air passage 3 1 of the throttle body 3 which the outer peripheral portion of the butterfly valve 1 at the time of valve closing faces , recesses 3 2 curved shape extending in the flow direction downstream of the airflow from the outer peripheral portion is formed in an annular shape. As a result, the air flow is pulled radially outward along the recess 3 2, wraps around airflow radially inward prevents eddy flow is generated, the occurrence of flow noise can be prevented.
【００３７】以上、本発明の実施例を詳述したが、本発
明はその要旨を逸脱しない範囲で種々の設計変更を行う
ことが可能である。Although the embodiments of the present invention have been described in detail, various design changes can be made in the present invention without departing from the gist thereof.
【００３８】例えば、実施例ではバタフライバルブ１お
よびスロットルボディ３を合成樹脂製としているが、そ
れらを金属製とすることも可能である。For example, in the embodiment, the butterfly valve 1 and the throttle body 3 are made of synthetic resin, but they may be made of metal.
【００３９】[0039]
【発明の効果】以上のように請求項１に記載された発明
によれば、全閉状態にあるバタフライバルブの外周部と
空気通路の内周面との間に形成された隙間を通過した空
気は、バタフライバルブの外周部の気流の流れ方向下流
側に形成された凸部に案内されて渦流を発生することな
くスムーズに流れるため、気流音の発生が防止される。As described above, according to the first aspect of the present invention, air passing through the gap formed between the outer peripheral portion of the butterfly valve and the inner peripheral surface of the air passage in the fully closed state. The air flows smoothly without generating a vortex by being guided by a convex portion formed on the outer peripheral portion of the butterfly valve on the downstream side in the flow direction of the air flow, so that generation of air flow noise is prevented.
【００４０】また請求項２に記載された発明によれば、
バタフライバルブの気流音を発生しない部分が上側ある
いは車室側に配置されるので、ドライバーが体感する気
流音を効果的に低減することができる。According to the second aspect of the present invention,
Since the portion of the butterfly valve that does not generate airflow noise is disposed on the upper side or the vehicle interior side, the airflow noise experienced by the driver can be effectively reduced.
【００４１】また請求項３に記載された発明によれば、
全閉状態にあるバタフライバルブの外周部と空気通路の
内周面との間に形成された隙間を通過した空気は、バタ
フライバルブの外周部の気流の流れ方向下流側の凸曲面
に案内されて渦流を発生することなくスムーズに流れる
ため、気流音の発生が防止される。According to the third aspect of the present invention,
The air that has passed through the gap formed between the outer peripheral portion of the butterfly valve and the inner peripheral surface of the air passage in the fully closed state is guided to the convex curved surface on the downstream side in the air flow direction of the outer peripheral portion of the butterfly valve. Since the air flows smoothly without generating a vortex, generation of airflow noise is prevented.
【００４２】また請求項４に記載された発明によれば、
バタフライバルブの気流音を発生しない部分が上側ある
いは車室側に配置されるので、ドライバーが体感する気
流音を効果的に低減することができる。According to the fourth aspect of the present invention,
Since the portion of the butterfly valve that does not generate airflow noise is disposed on the upper side or the vehicle interior side, the airflow noise experienced by the driver can be effectively reduced.
【００４３】また請求項５に記載された発明によれば、
バタフライバルブの剛性をリブによって効果的に高める
ことができる。According to the fifth aspect of the present invention,
The ribs can effectively increase the rigidity of the butterfly valve.
【００４４】また請求項６に記載された発明によれば、
回転軸の近傍の隙間はバタフライバルブが開状態になっ
ても消滅せずに気流音の原因となるが、バタフライバル
ブの気流に対向する面に形成した上流側から下流側に向
けて間隔が狭まる複数のリブにより、前記回転軸の近傍
の隙間に向かって気流が流れないようにして気流音の発
生を防止することができる。According to the invention described in claim 6,
Although the gap near the rotation axis does not disappear even when the butterfly valve is opened and causes airflow noise, the gap narrows from the upstream side formed on the surface facing the airflow of the butterfly valve to the downstream side The plurality of ribs can prevent the airflow from flowing toward the gap in the vicinity of the rotation shaft, thereby preventing the generation of the airflow noise.
【００４５】また請求項７に記載された発明によれば、
全閉状態にあるバタフライバルブの外周部と空気通路の
内周面との間に形成された隙間を通過した空気は、空気
通路の内周面に形成された凹部に案内されて渦流を発生
することなくスムーズに流れるため、気流音の発生が防
止される。According to the seventh aspect of the present invention,
The air that has passed through the gap formed between the outer peripheral portion of the butterfly valve in the fully closed state and the inner peripheral surface of the air passage is guided by a recess formed on the inner peripheral surface of the air passage to generate a vortex. Since the air flows smoothly without air flow, generation of airflow noise is prevented.
【００４６】また請求項８に記載された発明によれば、
バタフライバルブが開弁状態にあってその表面に沿って
空気が流れるとき、回転軸が空気の流れを乱すのを抑制
して気流音の発生を一層効果的に防止することができ
る。According to the invention described in claim 8,
When air flows along the surface of the butterfly valve while the butterfly valve is open, it is possible to more effectively prevent the rotation shaft from disturbing the flow of air and to more effectively prevent the generation of airflow noise.
【図１】第１実施例に係るスロットルバルブの縦断面図FIG. 1 is a longitudinal sectional view of a throttle valve according to a first embodiment.
【図２】図１の２−２線断面図FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図３】第２実施例に係るスロットルバルブの縦断面図FIG. 3 is a longitudinal sectional view of a throttle valve according to a second embodiment.
【図４】図３の４−４線断面図FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;
【図５】第３実施例に係るスロットルバルブの縦断面図FIG. 5 is a longitudinal sectional view of a throttle valve according to a third embodiment.
【図６】図５の６−６線断面図FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;
【図７】図５の要部拡大図FIG. 7 is an enlarged view of a main part of FIG. 5;
【図８】第３実施例に係るスロットルバルブの縦断面図FIG. 8 is a longitudinal sectional view of a throttle valve according to a third embodiment.
【図９】第４実施例に係るスロットルバルブの縦断面図FIG. 9 is a longitudinal sectional view of a throttle valve according to a fourth embodiment.
【図１０】従来のスロットルバルブの縦断面図FIG. 10 is a longitudinal sectional view of a conventional throttle valve.
１ バタフライバルブ ２ 回転軸 ３ スロットルボディ ３1 空気通路 ３2 凹部 ６ 凸部 ７，８，９ リブ １１ 凸部 α 隙間 Ｖ スロットルバルブReference Signs List 1 butterfly valve 2 rotating shaft 3 throttle body 3 1 air passage 3 2 concave portion 6 convex portion 7, 8, 9 rib 11 convex portion α gap V throttle valve
Claims (8)
ブ（１）をスロットルボディ（３）に形成した空気通路
（３1 ）の内部に揺動自在に配置し、全閉状態でのバタ
フライバルブ（１）の外周部と空気通路（３1 ）の内周
面との間に隙間（α）を形成してなるスロットルバルブ
において、 前記バタフライバルブ（１）の外周部の少なくとも一部
に、気流の流れ方向下流側に膨らむ凸部（６，１１）を
形成したことを特徴とするスロットルバルブ。A butterfly valve (1) supported on a rotating shaft (2) is swingably disposed inside an air passage (3 1 ) formed in a throttle body (3), and the butterfly valve in a fully closed state. A throttle valve having a gap (α) formed between the outer peripheral portion of ( 1 ) and the inner peripheral surface of the air passage (3 1 ), wherein at least a part of the outer peripheral portion of the butterfly valve (1) has an airflow. A throttle valve characterized by forming a convex portion (6, 11) bulging downstream in the flow direction of the throttle valve.
ンジンルームに搭載した状態で、全閉状態にあるバタフ
ライバルブ（１）の前記凸部（６，１１）を上側あるい
は車室側に配置したことを特徴とする、請求項１に記載
のスロットルバルブ。2. In a state where the throttle valve (V) is mounted in an engine room of a vehicle, the convex portions (6, 11) of the butterfly valve (1) in a fully closed state are arranged on an upper side or a passenger compartment side. The throttle valve according to claim 1, wherein:
ブ（１）をスロットルボディ（３）に形成した空気通路
（３1 ）の内部に揺動自在に配置し、全閉状態でのバタ
フライバルブ（１）の外周部と空気通路（３1 ）の内周
面との間に隙間（α）を形成してなるスロットルバルブ
において、 前記バタフライバルブ（１）の外周部の少なくとも一部
を、気流の流れ方向下流側に凸に湾曲させたことを特徴
とするスロットルバルブ。3. A butterfly valve (1) supported on a rotating shaft (2) is swingably disposed inside an air passage (3 1 ) formed in a throttle body (3), and the butterfly valve in a fully closed state. In a throttle valve having a gap (α) formed between the outer peripheral portion of ( 1 ) and the inner peripheral surface of the air passage (31), at least a part of the outer peripheral portion of the butterfly valve (1) is subjected to airflow. A throttle valve characterized by being convexly curved downstream in the flow direction.
ンジンルームに搭載した状態で、全閉状態にあるバタフ
ライバルブ（１）の前記湾曲した外周部を上側あるいは
車室側に配置したことを特徴とする、請求項３に記載の
スロットルバルブ。4. The butterfly valve (1) in a fully closed state, wherein the curved outer peripheral portion of the butterfly valve (1) is disposed on an upper side or a passenger compartment side with the throttle valve (V) mounted in an engine room of a vehicle. The throttle valve according to claim 3, wherein
湾曲方向内面にリブ（７，８，９）を設けたことを特徴
とする、請求項３に記載のスロットルバルブ。5. The throttle valve according to claim 3, wherein ribs (7, 8, 9) are provided on an inner surface in a bending direction of a bending portion of the butterfly valve (1).
ブ（１）をスロットルボディ（３）に形成した空気通路
（３1 ）の内部に揺動自在に配置し、全閉状態でのバタ
フライバルブ（１）の外周部と空気通路（３1 ）の内周
面との間に隙間（α）を形成してなるスロットルバルブ
において、 前記バタフライバルブ（１）の気流に対向する面に、気
流の流れ方向上流側から下流側に向けて間隔が狭まる複
数のリブ（８）を形成したことを特徴とするスロットル
バルブ。6. A butterfly valve in a fully closed state in which a butterfly valve (1) supported on a rotating shaft (2) is swingably disposed inside an air passage (3 1 ) formed in a throttle body (3). In the throttle valve having a gap (α) formed between the outer peripheral portion of ( 1 ) and the inner peripheral surface of the air passage (3 1 ), a surface of the butterfly valve (1) facing the air flow has an air flow. A throttle valve, comprising a plurality of ribs (8) whose intervals are narrowed from an upstream side to a downstream side in a flow direction.
ブ（１）をスロットルボディ（３）に形成した空気通路
（３1 ）の内部に揺動自在に配置し、全閉状態でのバタ
フライバルブ（１）の外周部と空気通路（３1 ）の内周
面との間に隙間（α）を形成してなるスロットルバルブ
において、 前記空気通路（３1 ）の内周面であって、全閉状態にあ
るバタフライバルブ（１）の外周部の気流の流れ方向下
流位置に凹部（３2 ）を形成したことを特徴とするスロ
ットルバルブ。7. A butterfly valve (1) supported on a rotating shaft (2) is swingably disposed inside an air passage (3 1 ) formed in a throttle body (3), and the butterfly valve is in a fully closed state. A throttle valve having a gap (α) formed between the outer peripheral portion of ( 1 ) and the inner peripheral surface of the air passage (3 1 ), wherein the inner peripheral surface of the air passage (3 1 ) throttle valve, characterized in that a recess (3 2) in the flow direction downstream position of the air flow of the outer peripheral portion of the butterfly valve (1) in the closed state.
（１）の内部に埋設したことを特徴とする、請求項１〜
７の何れかに記載のスロットルバルブ。8. The rotary valve according to claim 1, wherein said rotary shaft is buried inside a butterfly valve.
7. The throttle valve according to any one of 7 above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21174197A JP4021008B2 (en) | 1997-08-06 | 1997-08-06 | Throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21174197A JP4021008B2 (en) | 1997-08-06 | 1997-08-06 | Throttle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1150863A true JPH1150863A (en) | 1999-02-23 |
| JP4021008B2 JP4021008B2 (en) | 2007-12-12 |
Family
ID=16610825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21174197A Expired - Fee Related JP4021008B2 (en) | 1997-08-06 | 1997-08-06 | Throttle valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4021008B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013029082A (en) * | 2011-07-29 | 2013-02-07 | Denso Corp | Butterfly valve device for internal combustion engine |
| US8763384B2 (en) | 2009-11-09 | 2014-07-01 | Toyota Jidosha Kabushiki Kaisha | Exhaust apparatus of internal combustion engine |
| JP2019203668A (en) * | 2018-05-25 | 2019-11-28 | リンナイ株式会社 | Premixing device |
| CN112324962A (en) * | 2020-11-04 | 2021-02-05 | 贵州电网有限责任公司 | Disassembly-free pressure check valve of pressure release valve |
| CN112344033A (en) * | 2020-11-04 | 2021-02-09 | 贵州电网有限责任公司 | Pressure relief valve dismounting-free test valve device |
-
1997
- 1997-08-06 JP JP21174197A patent/JP4021008B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8763384B2 (en) | 2009-11-09 | 2014-07-01 | Toyota Jidosha Kabushiki Kaisha | Exhaust apparatus of internal combustion engine |
| JP2013029082A (en) * | 2011-07-29 | 2013-02-07 | Denso Corp | Butterfly valve device for internal combustion engine |
| JP2019203668A (en) * | 2018-05-25 | 2019-11-28 | リンナイ株式会社 | Premixing device |
| CN112324962A (en) * | 2020-11-04 | 2021-02-05 | 贵州电网有限责任公司 | Disassembly-free pressure check valve of pressure release valve |
| CN112344033A (en) * | 2020-11-04 | 2021-02-09 | 贵州电网有限责任公司 | Pressure relief valve dismounting-free test valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4021008B2 (en) | 2007-12-12 |
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