JPH11294199A - Intake air flow control valve - Google Patents

Intake air flow control valve

Info

Publication number
JPH11294199A
JPH11294199A JP9295698A JP9295698A JPH11294199A JP H11294199 A JPH11294199 A JP H11294199A JP 9295698 A JP9295698 A JP 9295698A JP 9295698 A JP9295698 A JP 9295698A JP H11294199 A JPH11294199 A JP H11294199A
Authority
JP
Japan
Prior art keywords
throttle valve
air passage
edge
valve element
raised
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9295698A
Other languages
Japanese (ja)
Inventor
Shigenori Tawara
重則 田原
Hiroyuki Yamada
裕之 山田
Akihiko Miyata
明彦 宮田
靖 ▲高▼野
Yasushi Takano
Akiyoshi Iida
明由 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Automotive Systems Engineering Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Car Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Car Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP9295698A priority Critical patent/JPH11294199A/en
Publication of JPH11294199A publication Critical patent/JPH11294199A/en
Pending legal-status Critical Current

Links

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  • Lift Valve (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

PROBLEM TO BE SOLVED: To eliminate the generation of an edge tone which is transmitted to the upstream of a throttle valve element and amplified like self-excited vibration by making an air stream flowing through a raised edge part of the throttle valve element into a discontinuous stream. SOLUTION: This valve includes a throttle valve shaft 4 which intersects perpendicularly to the axial direction of an air passage 1 and is rotatable, and a butterfly-like throttle valve element 5 journalled to the throttle valve shaft 4. The throttle valve element 5 is turned or returned in such a direction that the outer peripheral part of the throttle valve element and a part of the spherical surface of a raised form 6 or a curved surface 6a in its vicinity separate from the wall part 2, thereby opening and closing an air passage. An edge part 6b shaped like a raised form 6 is provided with plural groove parts 8 shaped to be wavy. The groove parts 8 disturb an air stream 7 flowing in two dimensions and continuously in the axial direction on the edge part 6b to be made three-dimensional, thereby producing a discontinuous air steam. Thus, the generation of edge tone can be eliminated.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、蝶形弁(バタフラ
イ弁)を用いた内燃機関の流量制御弁に係り、特に自動
車用内燃機関のスロットルバルブ(絞り弁)に好適な流
量制御弁に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control valve for an internal combustion engine using a butterfly valve (butterfly valve), and more particularly to a flow control valve suitable for a throttle valve (throttle valve) of an internal combustion engine for an automobile.

【0002】[0002]

【従来の技術】従来から自動車用のスロットルバルブと
しては、主として蝶形弁が使用されているが、この蝶形
弁を用いた構造の従来例として、特公昭61−54936 号公
報に記載の装置では、図6の様に回転可能に支持された
弁体に低開度域でスロットルボディのボア内壁との隙間
を小さく維持する球面の一部もしくはこれに近い曲面の
隆起形状をボア内壁に設けている。
2. Description of the Related Art Conventionally, butterfly valves have been mainly used as throttle valves for automobiles. As a conventional example using a butterfly valve, an apparatus disclosed in Japanese Patent Publication No. 61-54936 is known. In the valve body rotatably supported as shown in FIG. 6, a part of a spherical surface or a curved shape close to the spherical surface for maintaining a small gap with the bore inner wall of the throttle body in a low opening range is provided on the bore inner wall. ing.

【0003】また、公報特公平3−74530号公報に記載の
装置では、図5の様に回転可能に支持された弁体に低開
度域でスロットルボディのボア内壁との隙間を小さく維
持する球面の一部もしくはこれに近い曲面の隆起形状を
弁体に設けている。
Further, in the device described in Japanese Patent Publication No. 3-74530, a gap between an inner wall of a throttle body and a bore of a throttle body is kept small in a low opening region by a valve body rotatably supported as shown in FIG. A protruding shape of a part of the spherical surface or a curved surface close to the spherical surface is provided on the valve body.

【0004】これら上記公報では、図6の破線9で示す
ように低開度域での弁開度に対する開口面積の変化割合
を小さし、特に低開度域での開口面積変化割合の大きい
大口径のスロットルボディにおいて、ドライバビリティ
(運転性)の向上を図る様にした装置を提供できること
を開示している。
In these publications, as shown by a broken line 9 in FIG. 6, the rate of change of the opening area with respect to the valve opening in the low opening range is reduced, and particularly, the rate of change of the opening area in the low opening range is large. It discloses that a device capable of improving drivability (drivability) in a throttle body having a diameter can be provided.

【0005】[0005]

【発明が解決しようとする課題】ところで、図4に示し
た従来例において、空気通路内にある絞弁体5が翼形状
をしていることから、ある特定条件にてこの翼後縁部に
相当する隆起形状6のエッジ部6aを空気流7が連続的
に流れ、この連続的な渦放出によって発生する音波とな
り、これが絞弁体の上流側に伝播し自励振動的に増幅さ
れエッジトーンと呼ばれる大きな音を発生する。
In the prior art shown in FIG. 4, the throttle valve 5 in the air passage has a wing shape. The air flow 7 continuously flows through the edge portion 6a of the corresponding raised shape 6, and becomes a sound wave generated by the continuous vortex emission, which propagates to the upstream side of the throttle valve body and is amplified by self-excited vibration to be amplified by the edge tone. Generates a loud sound called.

【0006】本発明は、このエッジトーンの発生をなく
すことを目的とする。
An object of the present invention is to eliminate the generation of the edge tone.

【0007】[0007]

【課題を解決するための手段】絞弁体5が有する隆起形
状6のエッジ部6aを流れる空気流7が、不連続的な流
れとする様な構造とする。
The structure is such that the air flow 7 flowing through the edge 6a of the raised shape 6 of the throttle valve 5 has a discontinuous flow.

【0008】[0008]

【発明の実施の形態】以下、本発明による吸入空気制御
弁について、図1〜図3の実施例により説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An intake air control valve according to the present invention will be described below with reference to the embodiments shown in FIGS.

【0009】図2は本発明の一実施例で、1は上流側か
ら下流側へ空気を流過させるための円筒形状をした空気
通路、2は空気通路1の壁部、3は壁部2を構成する本
体、4は空気通路1軸線方向に対して直交し回動可能な
絞弁軸、5は絞弁軸4に軸支される蝶形の絞弁体、6は
絞弁体5に球面の一部もしくはこれに近い曲面の隆起形
状が有し、この絞弁体5が絞弁軸4の回転作動によっ
て、絞弁体外周部と隆起形状6の球面の一部もしくはこ
れに近い曲面6aが壁部2から離れる方向に回動した
り、戻ったりすることにより空気流路の開閉が行われ
る。
FIG. 2 shows an embodiment of the present invention. 1 is a cylindrical air passage for passing air from an upstream side to a downstream side, 2 is a wall of the air passage 1, and 3 is a wall 2. , A throttle valve shaft that is rotatable at right angles to the axial direction of the air passage 1, 5 is a butterfly-shaped throttle valve that is axially supported by the throttle valve 4, and 6 is a throttle valve 5. The throttle element 5 has a curved shape close to or part of the spherical surface of the throttle body outer periphery and the raised shape 6 due to the rotation of the throttle valve 4. The opening and closing of the air flow path is performed by turning or returning the 6a away from the wall 2.

【0010】図2の拡大図である図3においては、壁部
2と隆起形状6にあるエッジ部6bの間に空気流7が上
流側から下流側へ流入する。
In FIG. 3, which is an enlarged view of FIG. 2, an air flow 7 flows from the upstream side to the downstream side between the wall portion 2 and the edge portion 6b in the raised shape 6.

【0011】従って、これまでの構成は、図5に示した
従来例と同じであり、ドライバビリティの向上を図るも
のである。
Therefore, the configuration so far is the same as that of the conventional example shown in FIG. 5, and is intended to improve drivability.

【0012】しかして、この図1の実施例では、隆起形
状6にあるエッジ部6bに図2のようなウェーブ形状と
なる複数の溝部8が設けられている。
In the embodiment shown in FIG. 1, a plurality of groove portions 8 having a wave shape as shown in FIG.

【0013】この溝部8がエッジ部6b上を軸線方向に
二次元的かつ連続的に流れる空気流7を乱して、三次元
化し不連続な空気流れとする。
The groove 8 disturbs the two-dimensionally and continuously flowing air flow 7 in the axial direction on the edge portion 6b, thereby making the air flow 7 three-dimensional and a discontinuous air flow.

【0014】二次元的かつ連続的な渦から放出される音
波は、絞弁体の上流側に伝播し自励振動的に増幅されエ
ッジトーンと呼ばれる騒音を発生させる。本発明の作用
により、渦放出が三次元化されるためエッジトーンの発
生をなくすことが可能となる。
The sound wave emitted from the two-dimensional and continuous vortex propagates to the upstream side of the throttle body, is amplified by self-excited vibration, and generates noise called edge tone. According to the operation of the present invention, eddy emission is made three-dimensional, so that generation of edge tones can be eliminated.

【0015】[0015]

【発明の効果】本発明によれば、低開度域での弁開度に
対する開口面積の変化割合を小さし、特に低開度域での
開口面積変化割合の大きい大口径のスロットルボディに
おいて、ドライバビリティの向上を確保し、強いては、
様々な口径のスロットルボディのニーズに対応可能とな
ると共に、エッジトーンによる騒音の低減をし、かつ安
価に提供できる。
According to the present invention, the rate of change of the opening area with respect to the valve opening in the low opening range is reduced, and particularly in a large-diameter throttle body having a large opening area change rate in the low opening range. Ensuring drivability is improved,
It is possible to meet the needs of throttle bodies of various diameters, to reduce noise due to edge tones, and to provide inexpensively.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明による絞弁体の一実施例を示す斜視図で
ある。
FIG. 1 is a perspective view showing one embodiment of a throttle valve according to the present invention.

【図2】本発明による絞弁体の一実施例を示す断面図で
ある。
FIG. 2 is a sectional view showing an embodiment of a throttle valve according to the present invention.

【図3】本発明による絞弁体の一実施例を示す断面拡大
図である。
FIG. 3 is an enlarged sectional view showing one embodiment of a throttle valve according to the present invention.

【図4】絞弁体の従来例を示す斜視図。FIG. 4 is a perspective view showing a conventional example of a throttle body.

【図5】絞弁体の従来例を示す断面図。FIG. 5 is a cross-sectional view showing a conventional example of a throttle body.

【図6】絞弁体の開度と通気開口面積の関係を示す特性
図。
FIG. 6 is a characteristic diagram showing a relationship between an opening degree of a throttle body and a vent opening area.

【符号の説明】[Explanation of symbols]

1…空気通路、2…壁部、3…本体、4…絞弁軸、5…
絞弁体、6…隆起形状、6a…曲面、6b…エッジ部、
7…空気流、8…溝部。
DESCRIPTION OF SYMBOLS 1 ... Air passage, 2 ... Wall part, 3 ... Main body, 4 ... Throttle valve shaft, 5 ...
Throttle valve element, 6: raised shape, 6a: curved surface, 6b: edge portion,
7 ... air flow, 8 ... groove.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮田 明彦 茨城県ひたちなか市大字高場2520番地 株 式会社日立製作所自動車機器事業部内 (72)発明者 ▲高▼野 靖 茨城県土浦市神立町502番地 株式会社日 立製作所機械研究所内 (72)発明者 飯田 明由 茨城県土浦市神立町502番地 株式会社日 立製作所機械研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Miyata 2520 Ojitakaba, Hitachinaka City, Ibaraki Prefecture Inside the Automotive Equipment Division, Hitachi, Ltd. (72) Inventor (72) Inventor: Meiji Iida, Meiji Laboratory, Katsumachi, Tsuchiura-shi, Ibaraki Pref.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】内燃機関に空気を供給する空気通路を形成
する本体、該空気通路内に空気通路の軸線方向に対して
直交しかつ、回動可能に軸支された弁体、該弁体の外周
縁部付近に隆起形状を少なくとも一つを有する弁体にお
いて、 該隆起形状のエッジ部上面に空気通路の軸線方向に少な
くと一つの溝部を有することを特徴とする流量制御弁。
1. A main body forming an air passage for supplying air to an internal combustion engine, a valve body rotatably supported in the air passage at right angles to an axial direction of the air passage, and the valve body. A valve body having at least one raised shape near the outer peripheral edge of the valve body, wherein at least one groove is formed in the axial direction of the air passage on the upper surface of the edge of the raised shape.
【請求項2】請求項1の弁体において、 該隆起形状のエッジ部上面に空気通路の軸線方向に少な
くと一つの突起部を有することを特徴とする流量制御
弁。
2. The flow control valve according to claim 1, wherein at least one projection is provided on an upper surface of the raised edge in the axial direction of the air passage.
【請求項3】請求項1の弁体において、 該隆起形状のエッジ部上面に空気通路の直交方向に少な
くと一つの溝部を有することを特徴とする流量制御弁。
3. The flow control valve according to claim 1, wherein at least one groove is formed on an upper surface of the raised edge in a direction perpendicular to the air passage.
【請求項4】請求項1の弁体において、 該隆起形状のエッジ部上面に空気通路の直交方向に少な
くと一つの突起部を有することを特徴とする流量制御
弁。
4. The flow control valve according to claim 1, wherein at least one projection is provided on an upper surface of the raised edge in a direction orthogonal to the air passage.
JP9295698A 1998-04-06 1998-04-06 Intake air flow control valve Pending JPH11294199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9295698A JPH11294199A (en) 1998-04-06 1998-04-06 Intake air flow control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9295698A JPH11294199A (en) 1998-04-06 1998-04-06 Intake air flow control valve

Publications (1)

Publication Number Publication Date
JPH11294199A true JPH11294199A (en) 1999-10-26

Family

ID=14068918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9295698A Pending JPH11294199A (en) 1998-04-06 1998-04-06 Intake air flow control valve

Country Status (1)

Country Link
JP (1) JPH11294199A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2800798A1 (en) * 1999-11-10 2001-05-11 Magneti Marelli France THROTTLE BODY HAVING A BUTTERFLY WITH A LAMINATE
JP2010168039A (en) * 2009-01-23 2010-08-05 Valeo Climate Control Corp Hvac device including noise-reducing structure
JP2014190650A (en) * 2013-03-28 2014-10-06 Toto Ltd Bathroom air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2800798A1 (en) * 1999-11-10 2001-05-11 Magneti Marelli France THROTTLE BODY HAVING A BUTTERFLY WITH A LAMINATE
WO2001034958A1 (en) * 1999-11-10 2001-05-17 Magneti Marelli France Butterfly valve body comprising a throttle valve provided with a counterbore
US6705283B1 (en) 1999-11-10 2004-03-16 Magneti Marelli France Throttle body comprising a butterfly with a spot face
JP2010168039A (en) * 2009-01-23 2010-08-05 Valeo Climate Control Corp Hvac device including noise-reducing structure
JP2014190650A (en) * 2013-03-28 2014-10-06 Toto Ltd Bathroom air conditioner

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