JPH09195803A - Throttle valve device of internal combustion engine - Google Patents
Throttle valve device of internal combustion engineInfo
- Publication number
- JPH09195803A JPH09195803A JP474596A JP474596A JPH09195803A JP H09195803 A JPH09195803 A JP H09195803A JP 474596 A JP474596 A JP 474596A JP 474596 A JP474596 A JP 474596A JP H09195803 A JPH09195803 A JP H09195803A
- Authority
- JP
- Japan
- Prior art keywords
- throttle valve
- throttle
- fully closed
- chamber
- curved surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/08—Thermoplastics
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内燃機関の吸入空
気流量を制御するスロットルバルブ装置に関し、詳しく
は、スロットルバルブ微小開度域での空気量制御の分解
能向上を図ったスロットルチャンバの製作性向上を図る
技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve device for controlling an intake air flow rate of an internal combustion engine, and more specifically, a manufacturability of a throttle chamber for improving the resolution of air amount control in a small opening range of the throttle valve. Regarding technology to improve.
【０００２】[0002]
【従来の技術】従来、機関の吸気通路の一部を構成する
スロットルチャンバ内にスロットルバルブを配設し、該
スロットルバルブを前記スロットルチャンバの径方向の
軸回りに回動させて、スロットルバルブの周端とスロッ
トルバルブ内周面との間に画成される通路有効面積を変
化させて吸入空気流量を制御するスロットルバルブ装置
として、特開平２−９１４３１号公報及び特開昭５６−
５６９３８号公報等が知られている。2. Description of the Related Art Conventionally, a throttle valve is arranged in a throttle chamber which constitutes a part of an intake passage of an engine, and the throttle valve is rotated about an axis in a radial direction of the throttle chamber. As a throttle valve device for controlling the intake air flow rate by changing the effective passage area defined between the peripheral end and the inner peripheral surface of the throttle valve, there are disclosed in Japanese Patent Laid-Open Nos. 2-91431 and 56-56.
Japanese Patent No. 56938 is known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来のスロットルバルブ装置においては、次のよう
な問題点があった。即ち、特開平２−９１４３１号公報
等に開示されたスロットルバルブ装置においては、スロ
ットルチャンバ内周面が直円筒状内周面に形成されてい
る関係上、スロットルバルブの微小開度域でのバルブ回
動角に対する吸入空気流量が急激に変化する特性を有し
ている。However, such a conventional throttle valve device has the following problems. That is, in the throttle valve device disclosed in Japanese Unexamined Patent Publication (Kokai) No. 2-91431 or the like, since the inner peripheral surface of the throttle chamber is formed into the right cylindrical inner peripheral surface, the valve in the minute opening range of the throttle valve is It has the characteristic that the intake air flow rate changes rapidly with respect to the rotation angle.
【０００４】このため、吸入空気流量の少ない低負荷領
域での空気量制御の分解能が悪く、制御精度に劣る。従
って、特に品質のばらつき等を考慮すると、加工精度を
かなり高める必要性が生じる。一方、特開昭５６−５６
９３８号公報等に開示されたスロットルバルブ装置にお
いては、スロットルチャンバ内周面のスロットルバルブ
の全閉域に連なる微小開度域に対応する面に前記通路有
効面積を漸増させる略球面状の曲面を設けるようにして
いるため、スロットルバルブの微小開度域でのバルブ回
動角に対する吸入空気流量が徐々に変化する特性とな
り、吸入空気流量の少ない低負荷領域での空気量制御の
分解能が良好で、制御精度に優れるという利点を有する
が、スロットルチャンバの製作性の問題点がある。Therefore, the resolution of the air amount control in the low load region where the intake air flow rate is small is poor, and the control accuracy is poor. Therefore, it is necessary to considerably improve the processing accuracy, especially in consideration of quality variations. On the other hand, JP-A-56-56
In the throttle valve device disclosed in Japanese Patent No. 938 or the like, a substantially spherical curved surface for gradually increasing the passage effective area is provided on a surface of the inner peripheral surface of the throttle chamber that corresponds to a minute opening range continuous to the fully closed area of the throttle valve. Therefore, the intake air flow rate gradually changes with respect to the valve rotation angle in the small opening range of the throttle valve, and the resolution of the air flow rate control is good in the low load range where the intake air flow rate is small, Although it has an advantage of excellent control accuracy, it has a problem of manufacturability of the throttle chamber.
【０００５】即ち、スロットルチャンバ全体を金属で形
成した場合は、前記略球面状の曲面部分を後加工で切削
形成する必要があり、製作工程が増す等、生産効率の低
下を来す。又、このような問題をなくすため、スロット
ルチャンバ全体を樹脂で形成することが考えられるが、
樹脂材料の熱劣化等によって、スロットルチャンバの変
形等を生じる等耐久性に劣り、例えば、スロットルチャ
ンバ全閉時の洩れ空気量が増加して、ハイアイドル等の
運転性悪化という不都合な事態が生起する虞がある。That is, when the entire throttle chamber is made of metal, it is necessary to cut and form the substantially spherical curved surface portion by post-processing, which results in a decrease in production efficiency such as an increase in manufacturing steps. In order to eliminate such a problem, it is possible to form the entire throttle chamber with resin.
Due to heat deterioration of the resin material, the throttle chamber may be deformed, etc., resulting in poor durability.For example, the amount of leaked air when the throttle chamber is fully closed increases, causing inconvenient situations such as deterioration of drivability such as high idle. There is a risk of
【０００６】そこで、本発明は以上のような従来の問題
点に鑑み、スロットルチャンバ内周面のスロットルバル
ブの全閉域に連なる微小開度域に対応する面に通路有効
面積を漸増させる略球面状の曲面を設けるようにした装
置において、スロットルチャンバの製作性を向上しつ
つ、耐久性の向上を図ることを課題とする。In view of the above-mentioned conventional problems, the present invention has a substantially spherical shape in which the effective passage area is gradually increased on the surface of the inner peripheral surface of the throttle chamber which corresponds to the minute opening range connected to the fully closed range of the throttle valve. An object of the present invention is to improve the durability of the device in which the curved surface is provided while improving the manufacturability of the throttle chamber.
【０００７】[0007]
【課題を解決するための手段】このため、請求項１に係
る発明は、機関の吸気通路の一部を構成するスロットル
チャンバ内にスロットルバルブを配設し、該スロットル
バルブを前記スロットルチャンバの径方向の軸回りに回
動させて、スロットルバルブの周端とスロットルバルブ
内周面との間に画成される通路有効面積を変化させて吸
入空気流量を制御するスロットルバルブ装置であって、
前記スロットルチャンバ内周面のスロットルバルブの全
閉域に連なる微小開度域に対応する面に前記通路有効面
積を漸増させる略球面状の曲面を設けるようにした内燃
機関のスロットルバルブ装置において、前記スロットル
チャンバの少なくとも前記スロットルバルブ全閉域に対
応する所定幅部分を金属で形成すると共に、少なくとも
前記微小開度域に対応する前記曲面形成部分を樹脂によ
り形成するようにした。Therefore, in the invention according to claim 1, a throttle valve is arranged in a throttle chamber forming a part of an intake passage of an engine, and the throttle valve is provided with a diameter of the throttle chamber. A throttle valve device for controlling the intake air flow rate by rotating around an axis in the direction to change the effective passage area defined between the peripheral end of the throttle valve and the inner peripheral surface of the throttle valve,
A throttle valve device for an internal combustion engine, wherein a substantially spherical curved surface for gradually increasing the effective passage area is provided on a surface of the inner peripheral surface of the throttle chamber corresponding to a very small opening range connected to a fully closed area of the throttle valve. At least the predetermined width portion of the chamber corresponding to the fully closed region of the throttle valve is formed of metal, and at least the curved surface forming portion corresponding to the minute opening region is formed of resin.
【０００８】請求項２に係る発明は、前記スロットルチ
ャンバのスロットルバルブ全閉域に対応する所定幅部分
を金属で形成し、前記微小開度域に対応する前記曲面形
成部分を含む他部分を樹脂により形成するようにした。
請求項３に係る発明は、前記スロットルチャンバのスロ
ットルバルブ全閉域に対応する所定幅部分形成する環状
の金属鋳物を、前記微小開度域に対応する前記曲面形成
部分を含む他部分を形成する樹脂で鋳ぐるむようにし
た。According to a second aspect of the present invention, a portion of the throttle chamber having a predetermined width corresponding to the fully closed region of the throttle valve is made of metal, and the other portion including the curved surface forming portion corresponding to the minute opening region is made of resin. To form.
According to a third aspect of the present invention, an annular metal casting that forms a predetermined width portion corresponding to the throttle valve fully closed region of the throttle chamber, and a resin that forms another portion including the curved surface forming portion corresponding to the minute opening region. I made it by casting.
【０００９】請求項４に係る発明は、前記スロットルチ
ャンバのスロットルバルブ全閉域に対応する所定幅部分
を含む金属製の外筒と、該外筒内周面に挿入固定される
前記微小開度域に対応する前記曲面形成部分を含む樹脂
製の内筒と、を含んで構成した。請求項５に係る発明
は、前記スロットルバルブ全閉域に対応する所定幅Ｗ
は、スロットルチャンバ半径をｒ、スロットルバルブ全
閉角をθとしたとき、次の式により演算される値に設定
するようにした。According to a fourth aspect of the present invention, a metal outer cylinder including a predetermined width portion corresponding to the throttle valve fully closed region of the throttle chamber, and the minute opening region inserted and fixed to the inner peripheral surface of the outer cylinder. And an inner cylinder made of resin including the curved surface forming portion corresponding to. According to a fifth aspect of the present invention, a predetermined width W corresponding to the throttle valve fully closed region is provided.
Is set to a value calculated by the following equation, where r is the radius of the throttle chamber and θ is the fully closed angle of the throttle valve.
【００１０】Ｗ≒２ｒｓｉｎθW≈2r sin θ
【００１１】[0011]
【発明の効果】請求項１及び２に係る発明によれば、ス
ロットルチャンバの少なくとも微小開度域に対応する曲
面形成部分を樹脂により形成するようにした結果、スロ
ットルチャンバ全体を金属で形成した場合の如く略球面
状の曲面部分を後加工で切削形成する必要がなくなり、
製作工程を低減できる等、生産効率の向上を図ることが
できる。According to the inventions of claims 1 and 2, when the curved surface forming portion corresponding to at least the minute opening area of the throttle chamber is made of resin, the entire throttle chamber is made of metal. There is no need to cut and form a curved surface with a substantially spherical shape as in
It is possible to improve the production efficiency such as reducing the manufacturing process.
【００１２】又、スロットルチャンバの少なくともスロ
ットルバルブ全閉域に対応する所定幅部分を金属で形成
するようにした結果、スロットルバルブ全閉域に対応す
る所定幅部分が熱劣化等によって変形等を生じるのを阻
止できる等耐久性の向上を図れ、もって、例えば、スロ
ットルチャンバ全閉時の洩れ空気量が増加してハイアイ
ドル等の運転性悪化という不都合な事態が生起する虞が
なくなる。Further, since at least the predetermined width portion corresponding to the throttle valve fully closed region of the throttle chamber is made of metal, the predetermined width portion corresponding to the throttle valve fully closed region is deformed due to heat deterioration or the like. It is possible to improve durability such as prevention, and thus, for example, there is no fear that an inconvenient situation such as high idle and the like, which deteriorates drivability, will occur due to an increase in the amount of leaked air when the throttle chamber is fully closed.
【００１３】請求項３に係る発明によれば、環状の金属
鋳物を樹脂で鋳ぐるむだけで、スロットルチャンバを容
易に形成できる。請求項４に係る発明によれば、金属製
の外筒内周面に樹脂製の内筒を挿入固定するだけで、ス
ロットルチャンバを容易に形成できる。According to the third aspect of the present invention, the throttle chamber can be easily formed only by surrounding the annular metal casting with resin. According to the invention of claim 4, the throttle chamber can be easily formed only by inserting and fixing the resin inner cylinder into the inner peripheral surface of the metal outer cylinder.
【００１４】請求項５記載の発明によれば、スロットル
チャンバの全閉時に樹脂部分とスロットルチャンバとの
間で通路を構成せず、樹脂の熱劣化の影響を受け難くす
ることができると共に、曲面部分がスロットルバルブ周
端から遠ざかることがなく、曲面部分の本来の目的であ
るところの吸入空気流量の少ない低負荷領域での空気量
制御の分解能向上という効果を確実に得ることができ
る。According to the fifth aspect of the present invention, when the throttle chamber is fully closed, a passage is not formed between the resin portion and the throttle chamber, so that it is possible to reduce the influence of thermal deterioration of the resin and to make the curved surface. The portion does not move away from the peripheral edge of the throttle valve, and the effect of improving the resolution of the air amount control in the low load region where the intake air flow rate is small, which is the original purpose of the curved surface portion, can be reliably obtained.
【００１５】[0015]
【発明の実施の形態】以下、添付された図面を参照して
本発明を詳述する。図１は、本発明（請求項１〜３に係
る発明）の内燃機関のスロットルバルブ装置の一実施形
態を示す断面図であり、吸気通路の一部を構成するスロ
ットルチャンバ１内に回転軸２を有するスロットルバル
ブ３が配設され、このスロットルバルブ３はスロットル
チャンバ１の径方向の軸回りに回動され、スロットルバ
ルブ３の周端とスロットルチャンバ１内周面との間に画
成される通路有効面積を変化させて吸入空気流量を制御
するようになっている。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an embodiment of a throttle valve device for an internal combustion engine of the present invention (the invention according to claims 1 to 3). A rotary shaft 2 is provided in a throttle chamber 1 which constitutes a part of an intake passage. Is disposed around the radial axis of the throttle chamber 1, and is defined between the peripheral end of the throttle valve 3 and the inner peripheral surface of the throttle chamber 1. The intake air flow rate is controlled by changing the effective passage area.
【００１６】ここで、スロットルチャンバ１内周面のス
ロットルバルブ３の全閉域に連なる微小開度域に対応す
る面には、通路有効面積を漸増させる略球面状の曲面４
が設けられている。このようにスロットルチャンバ１内
周面に、スロットルバルブ３の回動角が例えば４０度程
度までの範囲にわたる曲面４部分を形成することによ
り、機関の低中負荷領域での吸入空気流量の制御精度を
向上できる。Here, on the surface of the inner peripheral surface of the throttle chamber 1 corresponding to the minute opening area connected to the fully closed area of the throttle valve 3, a substantially spherical curved surface 4 for gradually increasing the effective passage area is provided.
Is provided. By forming the curved surface 4 on the inner circumferential surface of the throttle chamber 1 in such a manner that the rotation angle of the throttle valve 3 extends to, for example, about 40 degrees, the control accuracy of the intake air flow rate in the low and medium load region of the engine is improved. Can be improved.
【００１７】かかるスロットルバルブ装置において、本
発明においては、スロットルチャンバ１の少なくともス
ロットルバルブ３全閉域に対応する所定幅Ｗ部分を金属
で形成すると共に、少なくとも前記微小開度域に対応す
る前記曲面４形成部分を樹脂により形成するようにして
いる。即ち、スロットルチャンバ１のスロットルバルブ
３全閉域に対応する所定幅Ｗ部分を金属で形成し、微小
開度域に対応する曲面４形成部分を含む他部分全体を樹
脂により形成するようにしている。In such a throttle valve device, in the present invention, at least the predetermined width W portion corresponding to the fully closed region of the throttle valve 3 of the throttle chamber 1 is made of metal, and at least the curved surface 4 corresponding to the minute opening region. The formed portion is made of resin. That is, the predetermined width W portion corresponding to the fully closed region of the throttle valve 3 of the throttle chamber 1 is formed of metal, and the other portion including the curved surface 4 forming portion corresponding to the small opening region is formed of resin.
【００１８】本実施形態においては、スロットルチャン
バ１のスロットルバルブ３全閉域に対応する所定幅Ｗ部
分を形成する環状の金属鋳物１Ａを設け、この金属鋳物
１Ａを、微小開度域に対応する曲面４形成部分を含む他
部分全体を形成する樹脂１Ｂで鋳ぐるむようにして、ス
ロットルチャンバ１を形成する。尚、具体的には樹脂１
Ｂを射出成形して、金属鋳物１Ａを鋳ぐるむ。In the present embodiment, an annular metal casting 1A forming a portion of a predetermined width W corresponding to the fully closed region of the throttle valve 3 of the throttle chamber 1 is provided, and this metal casting 1A is a curved surface corresponding to a minute opening range. The throttle chamber 1 is formed so as to be surrounded by the resin 1B that forms the entire other portion including the 4 formation portion. In addition, specifically, resin 1
B is injection-molded to surround the metal casting 1A.
【００１９】図２は、本発明（請求項１及び４に係る発
明）の内燃機関のスロットルバルブ装置の一実施形態を
示す断面図であり、スロットルチャンバ１は、スロット
ルバルブ３全閉域に対応する所定幅Ｗ部分を含む金属製
の外筒１Ｃと、微小開度域に対応する曲面形成部分を含
む２つの樹脂製の内筒１Ｄと、から構成される。この場
合、樹脂製の内筒１Ｄを夫々金属製の外筒１Ｃ内周面に
挿入して接着あるいは圧入等により固定する。FIG. 2 is a sectional view showing an embodiment of the throttle valve device for an internal combustion engine of the present invention (the invention according to claims 1 and 4), and the throttle chamber 1 corresponds to the fully closed region of the throttle valve 3. It is composed of a metal outer cylinder 1C including a predetermined width W portion, and two resin inner cylinders 1D including a curved surface forming portion corresponding to a minute opening area. In this case, the inner cylinders 1D made of resin are inserted into the inner peripheral surfaces of the outer cylinders 1C made of metal, and are fixed by adhesion or press fitting.
【００２０】上記のように、スロットルチャンバ１内周
面のスロットルバルブ３の全閉域に連なる微小開度域に
対応する面に通路有効面積を漸増させる略球面状の曲面
４を設けるようにしたものにおいて、スロットルチャン
バ１の少なくともスロットルバルブ３全閉域に対応する
所定幅Ｗ部分を金属で形成すると共に、少なくとも微小
開度域に対応する曲面４形成部分を樹脂により形成する
ようにした結果、次のような効果を奏する。As described above, the substantially spherical curved surface 4 for gradually increasing the effective passage area is provided on the inner peripheral surface of the throttle chamber 1 corresponding to the minute opening range connected to the fully closed area of the throttle valve 3. In the above, at least the portion of the predetermined width W of the throttle chamber 1 corresponding to the fully closed region of the throttle valve 3 is formed of metal, and at least the portion of the curved surface 4 corresponding to the minute opening region is formed of resin. It produces such an effect.
【００２１】即ち、スロットルチャンバ１の少なくとも
微小開度域に対応する曲面４形成部分を樹脂により形成
するようにした結果、スロットルチャンバ１全体を金属
で形成した場合の如く略球面状の曲面部分を後加工で切
削形成する必要がなくなり、製作工程を低減できる等、
生産効率の向上を図ることができる。又、スロットルチ
ャンバ１の少なくともスロットルバルブ３全閉域に対応
する所定幅Ｗ部分を金属で形成するようにした結果、ス
ロットルバルブ３全閉域に対応する所定幅Ｗ部分が熱劣
化等によって変形等を生じるのを阻止できる等耐久性の
向上を図れ、もって、例えば、スロットルチャンバ１全
閉時の洩れ空気量が増加してハイアイドル等の運転性悪
化という不都合な事態が生起する虞がなくなる。In other words, as a result of forming the curved surface 4 forming portion corresponding to at least the minute opening area of the throttle chamber 1 from resin, a substantially spherical curved surface portion as in the case where the entire throttle chamber 1 is formed from metal is formed. Since it is not necessary to cut and form in post processing, the manufacturing process can be reduced, etc.
Production efficiency can be improved. Further, as a result of forming at least a predetermined width W portion corresponding to the throttle valve 3 fully closed region of the throttle chamber 1 from metal, the predetermined width W portion corresponding to the throttle valve 3 fully closed region is deformed due to heat deterioration or the like. Therefore, it is possible to prevent the occurrence of an inconvenience such as a high idle or the like that deteriorates drivability due to an increase in the amount of leaked air when the throttle chamber 1 is fully closed.
【００２２】尚、スロットルチャンバ１において、樹脂
の熱劣化の影響を受け難くすることと、曲面部分の本来
の目的を活かすこととを目的として、スロットルバルブ
３全閉域に対応する所定幅Ｗは、スロットルチャンバ半
径をｒ、スロットルバルブ３全閉角をθ（例えば、５〜
６度）としたとき、次の式により演算される値に設定す
るのが好ましい（請求項５に係る発明）。In the throttle chamber 1, the predetermined width W corresponding to the fully closed region of the throttle valve 3 is set in order to make it less susceptible to the thermal deterioration of the resin and to utilize the original purpose of the curved surface portion. The radius of the throttle chamber is r, the fully closed angle of the throttle valve 3 is θ (for example, 5 to
6 degrees), it is preferable to set the value calculated by the following formula (the invention according to claim 5).
【００２３】Ｗ≒２ｒｓｉｎθ 上記Ｗが、２ｒｓｉｎθよりも小さいと、スロットルチ
ャンバ１の全閉時に樹脂部分とスロットルチャンバ１と
の間で通路を構成することになり、樹脂の熱劣化の影響
を受け易くなる。一方、Ｗが、２ｒｓｉｎθよりも大き
いと、曲面部分がスロットルバルブ３周端から遠ざかる
ことになり、曲面部分の本来の目的であるところの吸入
空気流量の少ない低負荷領域での空気量制御の分解能向
上という効果を得られなくなってしまう。W≈2rsin θ If W is smaller than 2rsin θ, a passage is formed between the resin portion and the throttle chamber 1 when the throttle chamber 1 is fully closed, and is easily affected by heat deterioration of the resin. Become. On the other hand, when W is larger than 2rsinθ, the curved surface portion is moved away from the peripheral edge of the throttle valve 3 and the resolution of air amount control in the low load region where the intake air flow rate is small, which is the original purpose of the curved surface portion. The effect of improvement cannot be obtained.
【図１】 請求項１〜３及び５記載の発明の一実施形態
を示す断面図FIG. 1 is a sectional view showing an embodiment of the invention described in claims 1 to 3.
【図２】 請求項１，４及び５記載の発明の一実施形態
を示す断面図FIG. 2 is a sectional view showing an embodiment of the invention described in claims 1, 4 and 5.
１ スロットルチャンバ １Ａ 金属鋳物 １Ｂ 樹脂 １Ｃ 金属製の外筒 １Ｄ 樹脂製の内筒 ３ スロットルバルブ ４ 曲面 1 Throttle chamber 1A Metal casting 1B Resin 1C Metal outer cylinder 1D Resin inner cylinder 3 Throttle valve 4 Curved surface
Claims (5)
ルチャンバ内にスロットルバルブを配設し、該スロット
ルバルブを前記スロットルチャンバの径方向の軸回りに
回動させて、スロットルバルブの周端とスロットルバル
ブ内周面との間に画成される通路有効面積を変化させて
吸入空気流量を制御するスロットルバルブ装置であっ
て、前記スロットルチャンバ内周面のスロットルバルブ
の全閉域に連なる微小開度域に対応する面に前記通路有
効面積を漸増させる略球面状の曲面を設けるようにした
内燃機関のスロットルバルブ装置において、 前記スロットルチャンバの少なくとも前記スロットルバ
ルブ全閉域に対応する所定幅部分を金属で形成すると共
に、少なくとも前記微小開度域に対応する前記曲面形成
部分を樹脂により形成するようにしたことを特徴とする
内燃機関のスロットルバルブ装置。1. A throttle valve is provided in a throttle chamber that constitutes a part of an intake passage of an engine, and the throttle valve is rotated about a radial axis of the throttle chamber to provide a peripheral end of the throttle valve. A throttle valve device for controlling an intake air flow rate by changing an effective passage area defined between a throttle valve and an inner peripheral surface of the throttle valve, wherein a minute opening connected to a fully closed region of the throttle valve on the inner peripheral surface of the throttle chamber. In a throttle valve device of an internal combustion engine in which a substantially spherical curved surface that gradually increases the effective passage area is provided on a surface corresponding to a degree range, at least a predetermined width portion of the throttle chamber corresponding to the fully closed range of the throttle valve is made of metal. And at least the curved surface forming portion corresponding to the minute opening range is formed of resin. A throttle valve device for an internal combustion engine, characterized in that
ブ全閉域に対応する所定幅部分を金属で形成し、前記微
小開度域に対応する前記曲面形成部分を含む他部分を樹
脂により形成したことを特徴とする請求項１記載の内燃
機関のスロットルバルブ装置。2. A portion of the throttle chamber having a predetermined width corresponding to the fully closed region of the throttle valve is formed of metal, and another portion including the curved surface forming portion corresponding to the small opening region is formed of resin. The throttle valve device for an internal combustion engine according to claim 1.
ブ全閉域に対応する所定幅部分形成する環状の金属鋳物
を、前記微小開度域に対応する前記曲面形成部分を含む
他部分を形成する樹脂で鋳ぐるむようにしたことを特徴
とする請求項２記載の内燃機関のスロットルバルブ装
置。3. A ring-shaped metal casting that forms a predetermined width portion corresponding to the throttle valve fully closed region of the throttle chamber is cast with a resin that forms another portion including the curved surface formation portion corresponding to the minute opening region. The throttle valve device for an internal combustion engine according to claim 2, wherein the throttle valve device is provided.
ブ全閉域に対応する所定幅部分を含む金属製の外筒と、
該外筒内周面に挿入固定される前記微小開度域に対応す
る前記曲面形成部分を含む樹脂製の内筒と、を含んで構
成したことを特徴とする請求項１記載の内燃機関のスロ
ットルバルブ装置。4. A metal outer cylinder including a predetermined width portion corresponding to a fully closed region of the throttle valve of the throttle chamber,
2. The internal combustion engine according to claim 1, further comprising: an inner cylinder made of resin including the curved surface forming portion corresponding to the minute opening area inserted into and fixed to the inner peripheral surface of the outer cylinder. Throttle valve device.
定幅Ｗは、スロットルチャンバ半径をｒ、スロットルバ
ルブ全閉角をθとしたとき、次の式により演算される値
に設定することを特徴とする請求項１〜４のうちいずれ
か１つに記載の内燃機関のスロットルバルブ装置。 Ｗ≒２ｒｓｉｎθ5. The predetermined width W corresponding to the throttle valve fully closed region is set to a value calculated by the following equation, where r is the throttle chamber radius and θ is the throttle valve fully closed angle. The throttle valve device for an internal combustion engine according to any one of claims 1 to 4. W ≒ 2r sin θ
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP474596A JPH09195803A (en) | 1996-01-16 | 1996-01-16 | Throttle valve device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP474596A JPH09195803A (en) | 1996-01-16 | 1996-01-16 | Throttle valve device of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09195803A true JPH09195803A (en) | 1997-07-29 |
Family
ID=11592460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP474596A Pending JPH09195803A (en) | 1996-01-16 | 1996-01-16 | Throttle valve device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09195803A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1154138A3 (en) * | 2000-05-12 | 2002-04-17 | Siemens Aktiengesellschaft | Method of making a throttle valve housing and throttle valve housing obtained thereby |
| WO2003019053A1 (en) * | 2001-08-23 | 2003-03-06 | Siemens Aktiengesellschaft | Butterfly valve connection piece for an internal combustion engine |
| US7237759B2 (en) | 2002-10-23 | 2007-07-03 | Hitachi, Ltd. | Air intake control device for internal combustion engine and air intake control device for gasoline engine |
| CN104912670A (en) * | 2014-03-10 | 2015-09-16 | 上海奥众汽车部件制造有限公司 | Throttling valve and idle speed control device of engine |
| CN107642418A (en) * | 2017-10-31 | 2018-01-30 | 潍柴动力股份有限公司 | Choke valve and engine |
| WO2019084763A1 (en) * | 2017-10-31 | 2019-05-09 | 潍柴动力股份有限公司 | Throttle valve and engine |
-
1996
- 1996-01-16 JP JP474596A patent/JPH09195803A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1154138A3 (en) * | 2000-05-12 | 2002-04-17 | Siemens Aktiengesellschaft | Method of making a throttle valve housing and throttle valve housing obtained thereby |
| US6649111B2 (en) | 2000-05-12 | 2003-11-18 | Mannesmann Vdo Ag | Method for producing a housing for a throttle valve connection piece |
| WO2003019053A1 (en) * | 2001-08-23 | 2003-03-06 | Siemens Aktiengesellschaft | Butterfly valve connection piece for an internal combustion engine |
| US7237759B2 (en) | 2002-10-23 | 2007-07-03 | Hitachi, Ltd. | Air intake control device for internal combustion engine and air intake control device for gasoline engine |
| CN104912670A (en) * | 2014-03-10 | 2015-09-16 | 上海奥众汽车部件制造有限公司 | Throttling valve and idle speed control device of engine |
| CN104912670B (en) * | 2014-03-10 | 2018-01-05 | 上海奥众汽车部件制造有限公司 | The idle speed controller of choke valve and engine |
| CN107642418A (en) * | 2017-10-31 | 2018-01-30 | 潍柴动力股份有限公司 | Choke valve and engine |
| WO2019084763A1 (en) * | 2017-10-31 | 2019-05-09 | 潍柴动力股份有限公司 | Throttle valve and engine |
| CN107642418B (en) * | 2017-10-31 | 2019-12-10 | 潍柴动力股份有限公司 | Throttle valve and engine |
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Legal Events
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| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040406 |