【発明の詳細な説明】
［産業上の利用分野〕
本発明はエンジン回転速度制御のため吸気管路に設けら
れた絞り弁、またはエンジン燃焼室のスワール制御のた
め＠気マニホルドの補助通路に設けられた開閉弁など，
エンジン吸気を制御するための制御弁装置に関するもの
である。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a throttle valve installed in an intake pipe line for engine speed control, or an auxiliary passage of an air manifold for swirl control of an engine combustion chamber. closed valves, etc.
The present invention relates to a control valve device for controlling engine intake air.
［従来の技術］
エンジン回転速度制御のための絞り弁、スワール制御の
ための開閉弁、その他ヱンジンの吸気系に設けられてエ
ンジン吸気の流量．流路を制御する制御弁は、第６図に
示すように吸気系の一部を構成する胴体３ｌに軸受孔３
２を対向形成してそこへ弁軸３３を貫入し、胴体３ｌの
中心軸線を直角に横切って配置させた弁軸３３に平板状
の弁板３４を止ねじ３５で固定して組立てた構成となっ
ているのが殆んどである．
即ち、弁軸３３を軸受孔３２に一方から差込んで弁板３
４を胴体３ｌの吸気路３６に一方から嵌込み、次に止ね
じ３５と締付工具とを吸気路３６に一方から入れて弁軸
３３に弁板３４を固定する，という作業順序で組立てる
ので、弁板３４を固定する際に弁軸３３を全閉位置附近
に固定しておかなければならない、止ねじ３５や締付工
具を入れて作業可能な位置および形状に弁板３４や吸気
路３６を配置形成しなければならないという制約がある
，多数の並行な吸気路３６に一本の弁軸３３を貫通して
多数の弁板３４を固定する場合作業性がよくない、など
の問題を避けることができない．
［発明が解決しようとする課題］
本発明は胴体の吸気路に弁軸を貫通させて弁板を固定す
ることによって組立てるためきわめて面倒であるという
従来の制御弁装置がもっている前記課題を解決しようと
するものであって、制御弁を胴体にきわめて簡単に組付
けて製造することができ、更に進んで円滑に開閉動作で
きるエンジン吸気制御弁装置を提供することを目的とす
る．
［課題を解決するための手段コ
本発明は胴体が制御弁の弁軸中心軸線を通り全閉位置に
おける弁板とほぼ平行な平面に沿って分割され互いに結
合された上流胴部と下流胴部とからなり，制御弁の弁板
を全閉位置において前記分割面の上流側または下流側に
位置させたことをもって前記課題を解決するための手段
とした．
［作用］
上流胴部と下流胴部とを分離した状態でそのいずれかの
胴部の分割面に完成品の制御弁を当てて半割りの軸受孔
に弁軸を嵌込み、次にもう一方の胴部を結合して組立て
る．制御弁の開閉操作は従来と同様である．二つの胴部
の寸法誤差や組付けの際の狂いによって二つの胴部の吸
気路に径の誤差やずれがあっても、弁板が全閉位置附近
で開閉するときに喰付きを生じない．［実施例］
図面を参照して本発明の実施例を説明する．第１、２、
３図は低圧燃料噴射弁を具えた吸気系にエンジン回転速
度制御のため設置された絞り弁と胴体（スロットルボデ
ィ）とからなる制御弁装置に本発明を実施した一例を示
している．
胴体１は制御弁（絞り弁） １１の弁軸１３の中心軸線
を通り吸気路の中心軸線に直角の平面に対し少し傾いた
平面に沿って分割された上流胴部２と下流胴部６とから
なり、これらは互いに連続する吸気路３、７と分割面Ａ
−Ａにおいて対向するフランジ４，８と半割りの軸受孔
５、，９とを具えていて図示しないボルト、ナットおよ
びガスケットにより気密に結合されている．制御弁１１
は円板形の弁板ｌ２を一つの直径上で弁軸Ｉ３に止ねじ
ｌ４により固定したよく知られている構成であるが、弁
板ｌ２は弁軸ｌ３の中心軸線Ｂ−Ｂに対し偏心した取付
而１５で弁軸】３に取付けられている．また，胴体ｌの
分割面Ａ−Ａは制御弁ｌ１の弁軸中心軸線Ｂ−Ｂを通り
且つ全閉位置における弁板１２とほぼ平行であるように
傾いた平面上に形成されている．
そして、この制御弁１１は弁板ｌ２が全閉であるアイド
ル位置で上流胴体２の吸気路３の中に位置し弁軸１３が
軸受孔５、９に支持されて胴体１に取付けられている．
このような構成の制御弁装置は、上流胴部２と下流胴部
６とを分離した状態で例えば上流胴体２の分割面Ａ−Ａ
に露出した軸受孔５に弁軸ｌ３の半周部分を嵌込む．こ
のとき、全閉位置で所定のアイドル開度となるように、
必要があれば吸気路３または弁板ｌ２に修正を施す．次
に下流胴部６を重ねてその軸受孔９に弁軸ｌ３の残りの
半周部分を嵌込んでフランジ４、８をボルト、ナットで
締付け結合することによって組立てられるのである．
弁軸１３は運転者のアクセル操作により、またはアクチ
ュエー夕により回転させられ弁板１２をアイドル位置か
ら全閉まで回動して吸気路３、７を流れる吸入空気量を
制御するのである．このとき、弁板ｌ２の第１図に符号
＋２ａで示す端縁部は」二流胴部２の吸気路３の内部で
回動するが、組付け時に前述のように調整しておく二と
により喰付きを生じたり或いはアイドル開度を必要以上
に大きくしたりすることがない．また、符号１２ｂで示
す反対側の端縁部はアイドル位置で上流胴部２の吸気路
３の内部に位置しており、同様に喰付きを生じ或いは過
大アイドル開度とすることがなく、これより開弁方向へ
回動するとき吸気路壁から離れるので、下流胴部６の吸
気路壁が寸法誤差や組付け狂いによって内側へ張出して
いても喰付く心配がない．
第４図は制御弁１１の弁板ｌ２を全閉位置で下流胴部６
の吸気路７の中に位置させた実施例であって、この構成
のものも前記同様に喰付きなどを解消することができる
．
第５図は制御弁の異なる実施例であって、符号２ｌで示
される制御弁は丸棒を鍛造加工して形成した弁板２２の
両側方に弁軸２３を一体に突設させた一体成形品であり
、弁板２２は弁軸２３の中心軸線Ｃ−Ｃに対し偏心して
形成されている．この実施例の制御弁２ｌによると弁板
２２に沿って弁軸が存在しないので全閉時における通路
抵抗が少なくエンジンの出力向上を計ることができる．
尚．軸受孔５、９に半割り状のメタル軸受を予め設置し
ておくか、または弁軸１３、２３に円筒形のメタル軸受
を予め嵌装しておくとよＩ，Ｘ．また、本発明によって
スワール制御を行なわせるときは、複数の互いに平行な
吸気路を有する一個の胴体とその軸受孔に支持された弁
軸に複数の弁板を設けた制御弁とを具えた制御弁装置と
し、吸気マニホルドの各補助通路を一斉に開閉するよう
にする．この場合も胴体は上流胴部と下流胴部とに分割
され，制御弁の弁体は全閉位置で分割面の上流側または
下流側に位置させられる．
本発明によると、胴体を」二流胴部と下流胴部とに分割
し予め製造された完成品の制御弁を挟んで結合した構成
であるので、多数の吸気路を一斉に開閉させるため多数
の弁板を具えた場合でもきわめて簡単迅速に且つ吸気路
の形状などに制約されずに制御弁を胴体に組付けること
ができる．
また、胴体の分割面を弁軸中心軸線を通って全閉位置の
弁板とほぼ平行な平面上に形成し、弁板は全閉時に分割
面の上流側または下流側のいずれかに位置させたので、
組付け時にアイドル位置や閉止位置を適正に調整できる
とともに、もう一方の胴部の吸気路がずれていても弁板
が喰付くことがなく、円滑に開閉動作を行なわせること
ができるものである．
第１図は本発明の実施例を示す縦断面図、第２図は第１
図のｘ−Ｘ線に沿う断面図、第３図は第１図の分割面Ａ
−Ａに沿う平面図、第４図は本発明の異なる実施例を示
す縦断面部分図、第５図は制御弁の異なる実施例を示す
一部切截した正面図，第６図は従来例の断面図である．
ｌ・・・胴体、２・・・上流胴部、３、７・・・吸気路
、５、
９・・・軸受孔、６・・・下流胴部、１１．２１・・・
制御弁、[Prior Art] Throttle valves for engine speed control, on-off valves for swirl control, and other valves installed in the engine intake system control the flow rate of engine intake air. The control valve that controls the flow path has a bearing hole 3 in the body 3l that forms part of the intake system, as shown in FIG.
2 are formed facing each other, a valve shaft 33 is inserted therein, and a flat valve plate 34 is fixed with a set screw 35 to the valve shaft 33 disposed perpendicularly across the center axis of the body 3l. Most of them are. That is, the valve shaft 33 is inserted into the bearing hole 32 from one side, and the valve plate 3 is
4 into the intake passage 36 of the body 3l from one side, then put the set screw 35 and tightening tool into the intake passage 36 from one side, and fix the valve plate 34 to the valve stem 33. When fixing the valve plate 34, the valve stem 33 must be fixed in the vicinity of the fully closed position.The valve plate 34 and the intake passage 36 must be placed in a position and shape that allows work by inserting the set screw 35 and tightening tool. Avoid problems such as having to arrange and form a large number of valve plates 34 through a single valve shaft 33 through a large number of parallel intake passages 36 and fixing a large number of valve plates 34 with poor workability. I can't. [Problems to be Solved by the Invention] The present invention aims to solve the problem that the conventional control valve device has, which is that it is extremely troublesome to assemble by passing the valve stem through the intake passage of the body and fixing the valve plate. It is an object of the present invention to provide an engine intake control valve device in which the control valve can be manufactured by extremely easily assembling the control valve to the fuselage, and which can open and close smoothly. [Means for Solving the Problems] The present invention provides an upstream body section and a downstream body section in which the body is divided along a plane passing through the center axis of the valve shaft of a control valve and substantially parallel to the valve plate in the fully closed position, and connected to each other. The solution to this problem is to position the valve plate of the control valve upstream or downstream of the dividing surface in the fully closed position. [Operation] With the upstream body and downstream body separated, place the finished control valve on the dividing surface of either body, fit the valve stem into the half-split bearing hole, and then insert the valve stem into the half-split bearing hole. Assemble by joining the body of. The opening and closing operations of the control valve are the same as before. Even if there is a diameter error or misalignment in the intake passages of the two bodies due to dimensional errors between the two bodies or misalignment during assembly, no jamming will occur when the valve plate opens and closes near the fully closed position. ．． [Example] An example of the present invention will be described with reference to the drawings. 1st, 2nd,
Figure 3 shows an example in which the present invention is applied to a control valve device consisting of a throttle valve and a throttle body installed in an intake system equipped with a low-pressure fuel injection valve to control engine speed. The body 1 is divided into an upstream body 2 and a downstream body 6 along a plane that passes through the central axis of the valve shaft 13 of a control valve (throttle valve) 11 and is slightly inclined to a plane perpendicular to the central axis of the intake passage. These consist of mutually continuous intake passages 3 and 7 and a dividing plane A.
-A is provided with opposing flanges 4, 8 and half-split bearing holes 5, 9, which are airtightly connected by bolts, nuts, and gaskets (not shown). control valve 11
is a well-known configuration in which a disc-shaped valve plate l2 is fixed on one diameter to the valve stem I3 with a set screw l4, but the valve plate l2 is eccentric with respect to the center axis B-B of the valve stem l3. It is attached to the valve stem 3 with the mounting number 15. Further, the dividing plane A-A of the body l is formed on a plane inclined so as to pass through the valve shaft center axis B-B of the control valve l1 and to be substantially parallel to the valve plate 12 in the fully closed position. The control valve 11 is located in the intake passage 3 of the upstream fuselage 2 at an idle position when the valve plate l2 is fully closed, and is attached to the fuselage 1 with the valve shaft 13 supported by the bearing holes 5 and 9. ．． In the control valve device having such a configuration, when the upstream body 2 and the downstream body 6 are separated, for example, the upstream body 2 is separated from the dividing plane A-A.
Insert the half circumference of the valve stem l3 into the bearing hole 5 exposed at the bottom. At this time, so that the predetermined idle opening is at the fully closed position,
If necessary, modify the intake passage 3 or valve plate l2. Next, the downstream body parts 6 are stacked, the remaining half circumference of the valve shaft l3 is fitted into the bearing hole 9, and the flanges 4 and 8 are tightened and connected using bolts and nuts. The valve shaft 13 is rotated by the driver's accelerator operation or by an actuator, and the valve plate 12 is rotated from the idle position to the fully closed position, thereby controlling the amount of intake air flowing through the intake passages 3 and 7. At this time, the edge portion of the valve plate 12 indicated by the symbol +2a in FIG. It does not cause jamming or make the idle opening larger than necessary. In addition, the opposite end edge indicated by reference numeral 12b is located inside the intake passage 3 of the upstream body 2 at the idle position, and similarly does not cause jamming or excessive idle opening. Since it separates from the intake passage wall when it rotates further toward the valve opening direction, there is no fear of it getting stuck even if the intake passage wall of the downstream body 6 protrudes inward due to dimensional errors or assembly errors. FIG. 4 shows the downstream body 6 with the valve plate l2 of the control valve 11 in the fully closed position.
This is an embodiment in which the engine is located in the intake passage 7 of the engine, and this configuration can also eliminate the problem of jamming as described above. Fig. 5 shows a different embodiment of the control valve, and the control valve designated by the reference numeral 2l is integrally formed with a valve shaft 23 integrally protruding from both sides of a valve plate 22 formed by forging a round bar. The valve plate 22 is eccentrically formed with respect to the center axis C--C of the valve shaft 23. According to the control valve 2l of this embodiment, since there is no valve shaft along the valve plate 22, there is little passage resistance when the valve is fully closed, and it is possible to improve the engine output.
still. Half-shaped metal bearings may be installed in the bearing holes 5 and 9 in advance, or cylindrical metal bearings may be fitted in the valve shafts 13 and 23 in advance. Further, when performing swirl control according to the present invention, a control valve including a single body having a plurality of mutually parallel intake passages and a control valve having a plurality of valve plates on a valve shaft supported in a bearing hole of the body is used. A valve device is used to open and close each auxiliary passage in the intake manifold at the same time. In this case as well, the body is divided into an upstream body and a downstream body, and the valve body of the control valve is located at the fully closed position on the upstream or downstream side of the dividing plane. According to the present invention, the body is divided into a second-flow body part and a downstream body part, which are connected by sandwiching a pre-manufactured finished control valve. Even when equipped with a valve plate, the control valve can be assembled to the fuselage extremely easily and quickly without being restricted by the shape of the intake passage. In addition, the dividing surface of the body is formed on a plane that passes through the center axis of the valve shaft and is approximately parallel to the valve plate in the fully closed position, and the valve plate is positioned either upstream or downstream of the dividing surface when fully closed. So,
The idle position and closing position can be adjusted appropriately during assembly, and even if the intake path of the other body is misaligned, the valve plate will not bite, allowing smooth opening and closing operations. ．． FIG. 1 is a vertical sectional view showing an embodiment of the present invention, and FIG.
A cross-sectional view taken along the line x-X in the figure, Figure 3 is the dividing plane A in Figure 1.
- A plan view taken along line A, FIG. 4 is a vertical cross-sectional partial view showing different embodiments of the present invention, FIG. 5 is a partially cutaway front view showing different embodiments of the control valve, and FIG. 6 is a conventional example. This is a cross-sectional view.
l...Body, 2...Upstream body, 3, 7...Intake path, 5, 9...Bearing hole, 6...Downstream body, 11.21...
control valve,