JPS6329170Y2 - - Google Patents

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Publication number
JPS6329170Y2
JPS6329170Y2 JP16048483U JP16048483U JPS6329170Y2 JP S6329170 Y2 JPS6329170 Y2 JP S6329170Y2 JP 16048483 U JP16048483 U JP 16048483U JP 16048483 U JP16048483 U JP 16048483U JP S6329170 Y2 JPS6329170 Y2 JP S6329170Y2
Authority
JP
Japan
Prior art keywords
pressure chamber
intake
diaphragm
carburetor
heat
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.)
Expired
Application number
JP16048483U
Other languages
Japanese (ja)
Other versions
JPS6066859U (en
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 filed Critical
Priority to JP16048483U priority Critical patent/JPS6066859U/en
Publication of JPS6066859U publication Critical patent/JPS6066859U/en
Application granted granted Critical
Publication of JPS6329170Y2 publication Critical patent/JPS6329170Y2/ja
Granted legal-status Critical Current

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  • Temperature-Responsive Valves (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Description

【考案の詳細な説明】 本考案は、気化器本体に内設された吸気道を横
切つて摺動可能な摺動弁の外端部に、吸気道のベ
ンチユリ部に連通する負圧室と、該ベンチユリ部
よりも上流側に連通し前記負圧室より吸気道側に
位置する圧力室とを画成するダイヤフラムが連結
される気化器、いわゆる定負圧式可変ベンチユリ
型気化器に関する。
[Detailed description of the invention] The present invention has a negative pressure chamber that communicates with the vent lily of the intake passage at the outer end of the sliding valve that can slide across the intake passage installed in the carburetor body. The present invention relates to a so-called constant negative pressure variable bench lily type carburetor, which is connected to a diaphragm that communicates upstream of the bench lily portion and defines a pressure chamber located on the intake path side of the negative pressure chamber.

従来、かかる気化器では、ベンチユリ部よりも
上流側の吸気道から圧力室内に導入された吸気道
空気が、ダイヤフラムに直接接触することが許容
されている。すなわち、連通路の圧力室への開口
は、一般的にダイヤフラムに臨んで設けられてお
り、その開口から圧力室内に導入された吸気道空
気がダイヤフラムに直接接触する構造となつてい
る。このため、吸気道空気が高温であるとき、た
とえば過給機を経て気化器に燃焼用空気が供給さ
れるようなときには、その高温空気に接触したダ
イヤフラムが過熱するおそれがある。特に作動応
答性を向上させるために、ダイヤフラムをゴム製
とした場合には、上記過熱を極力防ぐことが望ま
しい。
Conventionally, in such a carburetor, intake passage air introduced into the pressure chamber from the intake passage upstream of the bench lily portion is allowed to directly contact the diaphragm. That is, the opening of the communication passage to the pressure chamber is generally provided facing the diaphragm, and the structure is such that intake air introduced into the pressure chamber through the opening comes into direct contact with the diaphragm. Therefore, when the intake air is at a high temperature, for example when combustion air is supplied to the carburetor via a supercharger, there is a risk that the diaphragm that comes into contact with the high temperature air will overheat. In particular, when the diaphragm is made of rubber in order to improve operational responsiveness, it is desirable to prevent the above-mentioned overheating as much as possible.

本考案は、このような従来の欠点を解消すべく
なされたものであり、高温空気が供給されてもダ
イヤフラムが過熱することを防止した気化器を提
供することを目的とする。
The present invention was made in order to eliminate such conventional drawbacks, and an object of the present invention is to provide a vaporizer that prevents the diaphragm from overheating even when high-temperature air is supplied.

このような目的を達成するために、本考案で
は、圧力室と吸気道のベンチユリ部よりも上流側
の部分とを連通する連通路の途中、あるいは圧力
室内に吸気道空気の熱を放熱する放熱手段が配接
される。
In order to achieve this purpose, the present invention provides a heat dissipation system that radiates the heat of the air in the intake tract into the pressure chamber or in the middle of the communication path that communicates the pressure chamber with the part of the intake tract upstream of the bench lily. means are arranged.

以下、図面により本考案の一実施例について説
明すると、先ず第1図において、この気化器1
は、過給機付内燃機関に用いられており、過給機
で比較的高温となつた燃焼用空気が気化器1内に
導入され、吸気道2のベンチユリ部3の負圧と、
ベンチユリ部3よりも上流側の空気圧との差圧に
応じて摺動弁4が開閉動作し、ベンチユリ部3の
負圧がほぼ一定となるように吸気量が制御され
る。
Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. First, in FIG.
is used in an internal combustion engine with a supercharger, in which combustion air that has become relatively high temperature in the supercharger is introduced into the carburetor 1, and the negative pressure in the bench lily portion 3 of the intake passage 2 is increased.
The sliding valve 4 opens and closes depending on the pressure difference between the air pressure on the upstream side of the bench lily portion 3, and the amount of intake air is controlled so that the negative pressure in the bench lily portion 3 is approximately constant.

気化器本体5には、気化器1を機関に取付けた
ときに上流から下流に向けて斜め下方となるよう
な吸気道2が穿設され、その吸気道2の途中にベ
ンチユリ部3が設けられる。ベンチユリ部3の下
流側には蝶型紋り弁6が軸支されており、この蝶
型紋り弁6は図示しない操作手段により開閉作動
される。
The carburetor main body 5 is provided with an intake passage 2 that extends diagonally downward from upstream to downstream when the carburetor 1 is attached to an engine, and a bench lily portion 3 is provided in the middle of the intake passage 2. . A butterfly-shaped crest valve 6 is pivotally supported on the downstream side of the bench lily portion 3, and this butterfly-shaped crest valve 6 is opened and closed by an operating means (not shown).

気化器本体5の下部にはフロ−ト室7を形成す
るためのフロ−ト室体8がシ−ル部材9を介して
結合されており、フロ−ト室7内には燃料油面に
応じて上下動するフロ−ト10が収納される。こ
のフロ−ト10はフロ−トア−ム11を介して支
軸12に枢支されており、気化器本体5の下部に
設けられた弁孔13を開閉するためのフロ−ト弁
14がフロ−ト10の上下動に応じて開閉動作す
べくフロ−トア−ム11に当接される。
A float chamber body 8 for forming a float chamber 7 is connected to the lower part of the carburetor body 5 via a seal member 9. A float 10 that moves up and down accordingly is housed. This float 10 is pivotally supported on a support shaft 12 via a float arm 11, and a float valve 14 for opening and closing a valve hole 13 provided in the lower part of the carburetor main body 5 is connected to the float 10 via a float arm 11. - It is brought into contact with the float arm 11 in order to open and close in response to the vertical movement of the float 10.

また気化器本体5の上部には、ベンチユリ部3
に対応する位置で吸気道2と直交する方向に延び
る案内筒15が一体的に連設され、さらに案内筒
15を同心に囲繞するようにして円筒状ハウジン
グ部16が一体的に連設される。ハウジング部1
6の上端には、深皿状のカバ−17がねじ部材1
8により固着されており、このカバ−17とハウ
ジング部16の上端との間に、ダイヤフラム19
の外周縁が挾持される。ダイヤフラム19の中央
部には案内筒15内に摺合する有底円筒状摺動弁
4の外端部がリテ−ナ20,21を介して結合さ
れており、ダイヤフラム19およびカバ−17間
に負圧室22が画成され、ダイヤフラム19およ
び気化器本体5の上部間に圧力室23が画成され
る。
In addition, a bench lily portion 3 is provided at the top of the carburetor main body 5.
A guide cylinder 15 extending in a direction perpendicular to the intake passage 2 is integrally installed at a position corresponding to the intake passage 2, and a cylindrical housing part 16 is integrally installed so as to concentrically surround the guide cylinder 15. . Housing part 1
A deep dish-shaped cover 17 is provided on the upper end of the screw member 1.
A diaphragm 19 is fixed between the cover 17 and the upper end of the housing part 16.
The outer periphery of is clamped. The outer end of a bottomed cylindrical slide valve 4 that slides into the guide tube 15 is connected to the center of the diaphragm 19 via retainers 20 and 21, and a negative gap is formed between the diaphragm 19 and the cover 17. A pressure chamber 22 is defined, and a pressure chamber 23 is defined between the diaphragm 19 and the upper part of the carburetor body 5.

摺動弁4はその開放端を負圧室22に臨ませて
ダイヤフラム19に連結されており、摺動弁4内
には、半径方向内方に突出した内鍔24が突設さ
れており、この内鍔24はその周方向に間隔をあ
けた複数の位置が切欠かれ、それにより複数の流
通路25が形成される。内鍔24およびカバ−1
7間にはコイルばね26が介装されており、した
がつて摺動弁4にコイルばね26により閉弁方向
の付勢力が作用する。
The slide valve 4 is connected to the diaphragm 19 with its open end facing the negative pressure chamber 22, and an inner flange 24 projecting radially inward is provided inside the slide valve 4. This inner flange 24 is cut out at a plurality of positions spaced apart in the circumferential direction, thereby forming a plurality of flow passages 25. Inner guard 24 and cover 1
A coil spring 26 is interposed between the valves 7 and 7, so that a biasing force is applied to the slide valve 4 in the valve closing direction by the coil spring 26.

摺動弁4の底部中央には、上端に支持鍔27を
有するジエツトニ−ドル28が挿通されており、
このジエツトニ−ドル28は前記内鍔24に係合
される支承部材29との間に介装されるコイル状
支持ばね30のばね力により支持鍔27が摺動弁
4の底部に押付けられ、それによつて摺動弁4の
底部にジエツトニ−ドル28が保持される。また
摺動弁4の底部には、負圧導入孔31が穿設され
ており、したがつてベンチユリ部3の負圧が負圧
導入孔31および流通路25を経て負圧室22に
作用する。
A jet needle 28 having a support collar 27 at its upper end is inserted into the center of the bottom of the slide valve 4.
This jet needle 28 has a support flange 27 pressed against the bottom of the slide valve 4 by the spring force of a coiled support spring 30 interposed between the support member 29 engaged with the inner flange 24, and The jet needle 28 is thus held at the bottom of the sliding valve 4. Further, a negative pressure introduction hole 31 is bored at the bottom of the slide valve 4, so that the negative pressure of the bench lily portion 3 acts on the negative pressure chamber 22 via the negative pressure introduction hole 31 and the flow passage 25. .

一方、気化器本体5の下部には、ベンチユリ部
3に対応して吸気道2に開口するメインノズル3
2が設けられており、このメインノズル32には
ジエツトニ−ドル28が挿入される。気化器本体
5にはメインノズル32の周囲に環状室33が形
成されており、メインノズル32にはその環状室
33に連通する連通孔34が穿設される。また環
状室33にはフロ−ト室7内の燃料油面下に開口
するメインジエツト35がエアブリ−ド管36を
介して連通される。また蝶型絞り弁6付近には底
速ノズル43が開口される。気化器本体5の上部
において、吸気方向37に沿う上流側で圧力室2
3に臨む開口部38aから吸気道2の上流端に連
通する連通路38が穿設される。したがつて、吸
気道2の上流端から連通路38および開口部38
aを経て吸気道空気が圧力室23内に導入され
る。その吸気道空気は過給機によつて比較的高温
となつており、その高温空気が圧力室23内でダ
イヤフラム19に直接接触して過熱することを防
止するために、本考案に従えば圧力室23内に放
熱手段としての放熱板39が配設される。
On the other hand, at the lower part of the carburetor body 5, there is a main nozzle 3 that opens into the intake passage 2 corresponding to the bench lily part 3.
2 is provided, and a jet needle 28 is inserted into this main nozzle 32. An annular chamber 33 is formed around a main nozzle 32 in the vaporizer body 5, and a communication hole 34 communicating with the annular chamber 33 is bored in the main nozzle 32. Further, a main jet 35 that opens below the fuel oil level in the float chamber 7 is communicated with the annular chamber 33 via an air bleed pipe 36. Further, a bottom speed nozzle 43 is opened near the butterfly-shaped throttle valve 6. In the upper part of the carburetor main body 5, the pressure chamber 2 is located on the upstream side along the intake direction 37.
A communication passage 38 communicating with the upstream end of the intake passage 2 is bored from the opening 38a facing the intake passage 3 . Therefore, from the upstream end of the intake passage 2 to the communication passage 38 and the opening 38
Intake air is introduced into the pressure chamber 23 via a. The intake air has a relatively high temperature due to the supercharger, and in order to prevent the high temperature air from directly contacting the diaphragm 19 in the pressure chamber 23 and overheating, according to the present invention, the pressure is reduced. A heat radiating plate 39 serving as a heat radiating means is arranged within the chamber 23 .

第2図を併せて参照して、放熱板39は熱伝導
性に優れた金属から成り、その内外周縁部が気化
器本体5に接触するようにして基本的に円環状に
形成され、圧力室23内で開口部38aとダイヤ
フラム19との間で、開口部38aからの吸気道
空気に対向するようにして気化器本体5に固定さ
れる。
Referring also to FIG. 2, the heat dissipation plate 39 is made of a metal with excellent thermal conductivity, and is basically formed in an annular shape so that its inner and outer peripheral edges are in contact with the carburetor body 5, and the pressure chamber 23 between the opening 38a and the diaphragm 19, and is fixed to the carburetor main body 5 so as to face the intake air from the opening 38a.

この放熱板39には吸気道空気の流通を許容す
るための複数たとえば3つの透孔40,41,4
2が穿設されるが、それらの透孔40〜42は開
口部38aから極力離反した位置に設けられてお
り、それらの開口面積は開口部38aから離隔す
る程大とされる。すなわち透孔41の開口面積が
他の透孔40,42の開口面積に比べて大とされ
る。
This heat dissipation plate 39 has a plurality of through holes 40, 41, 4, for example, three, for allowing the circulation of intake air.
The through holes 40 to 42 are provided at positions as far away from the opening 38a as possible, and their opening areas become larger as the distance from the opening 38a increases. That is, the opening area of the through hole 41 is made larger than the opening areas of the other through holes 40 and 42.

次にこの実施例の作用について説明すると、圧
力室23には、図示しない過給機で加圧されした
がつて比較的高温となつた吸気道空気が連通路3
8および開口部38aを経て導入されるが、その
吸気道空気は放熱板39に遮られてダイヤフラム
19に直接接触せず、案内筒15の周囲を迂回し
て各透孔40,41,42を流通する。この間
に、吸気道空気は放熱板39に接触し、熱伝導性
の優れた放熱板39が気化器本体5に接触してい
ることから、放熱板39は吸気道空気から奪つた
熱を、気化器本体5を介して放出し、吸気道空気
を冷却する。したがつて、高温度の吸気道空気が
ダイヤフラム19に接触することが避けられ、ダ
イヤフラム19の過熱が防止される。
Next, to explain the operation of this embodiment, the intake air, which has been pressurized by a supercharger (not shown) and thus has a relatively high temperature, is transferred to the pressure chamber 23 through the communication path 23.
8 and the opening 38a, but the intake air is blocked by the heat sink 39 and does not come into direct contact with the diaphragm 19, bypassing the guide tube 15 and passing through the through holes 40, 41, 42. circulate. During this time, the intake air is in contact with the heat sink 39, and since the heat sink 39, which has excellent thermal conductivity, is in contact with the carburetor body 5, the heat sink 39 transfers the heat taken from the air in the intake air to the vaporizer. It is discharged through the container body 5 to cool the intake tract air. Therefore, high temperature intake air is prevented from coming into contact with the diaphragm 19, and overheating of the diaphragm 19 is prevented.

このようにこの実施例によれば、極めて簡単な
構造の放熱板39を圧力室23内に設けることに
より、放熱面積を大にして優れた冷却効果を得る
ことができ、既存の定負圧式可変ベンチユリ型気
化器にも容易に適用することができる。また冷却
効果だけでなく、開口部38aの吸気道空気がダ
イヤフラム19に直接かつ局部的に接触すること
が避けられるので、ダイヤフラム19の局部過熱
が防止される。
As described above, according to this embodiment, by providing the heat sink 39 with an extremely simple structure inside the pressure chamber 23, it is possible to increase the heat radiation area and obtain an excellent cooling effect. It can also be easily applied to bench lily type vaporizers. In addition to the cooling effect, direct and local contact of the air in the opening 38a with the diaphragm 19 is avoided, so local overheating of the diaphragm 19 is prevented.

なお、ダイヤフラム19の作動応答性を良くす
るためには、放熱板39による流通抵坑を減少す
ることが望ましいが、放熱板39による熱遮蔽効
果および冷却効果を維持するために、前記流通抵
抗の減少には限界があり、開口部38aから離隔
した位置でのみ各透孔40〜42の開口面積を可
及的に大として流通抵抗の減少を図ることが望ま
しい。
Note that in order to improve the operational response of the diaphragm 19, it is desirable to reduce the flow resistance caused by the heat sink 39. However, in order to maintain the heat shielding effect and cooling effect of the heat sink 39, the flow resistance There is a limit to the reduction, and it is desirable to reduce the flow resistance by making the opening area of each of the through holes 40 to 42 as large as possible only at positions distant from the opening 38a.

本考案の他の実施例として、冷却手段は連通路
38の途中に設けられていてもよい。また放熱板
39に代えて、第1図の二点鎖線で示すように、
気化器本体5の開口部38aに対向する部分を凹
凸形状として放熱効果を発揮させるようにしても
よく、そのような凹凸形状を連通路38の側壁に
設けるようにしてもよい。さらに、放熱板39に
設けられる透孔を単一として、第2図の二点鎖線
で示すように、開口部38aから離反する程幅広
となる月の輪形状にしてもよい。
As another embodiment of the present invention, the cooling means may be provided in the middle of the communication path 38. Also, instead of the heat sink 39, as shown by the two-dot chain line in FIG.
The portion of the vaporizer main body 5 facing the opening 38a may be formed into an uneven shape to exhibit a heat dissipation effect, and such an uneven shape may be provided on the side wall of the communication path 38. Furthermore, the heat dissipation plate 39 may have a single through-hole, which has a moon ring shape that becomes wider as it moves away from the opening 38a, as shown by the two-dot chain line in FIG.

以上のように本考案によれば、圧力室と吸気道
空気のベンチユリ部よりも上流側の部分とを連通
する連通略の途中、あるいは圧力室内に、吸気道
空気の熱を放熱する放熱手段が配設させるので、
高温度の空気がダイヤフラムに接触することが避
けられ、したがつてダイヤフラムの過熱が防止さ
れる。
As described above, according to the present invention, the heat radiating means for radiating the heat of the intake air is provided in the middle of the communication between the pressure chamber and the portion of the intake air that is upstream of the bench lily, or within the pressure chamber. Because it is arranged,
High temperature air is prevented from contacting the diaphragm, thus preventing overheating of the diaphragm.

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

図面は本考案の一実施例を示すものであり、第
1図は縦断側面図、第2図は第1図の−線か
ら見た放熱板の平面図である。 1…気化器、2…吸気道、3…ベンチユリ部、
4…摺動弁、5…気化器本体、19…ダイヤフラ
ム、22…負圧室、23…圧力室、38…連通
路、39…放熱手段としての放熱板。
The drawings show one embodiment of the present invention, and FIG. 1 is a vertical side view, and FIG. 2 is a plan view of the heat sink seen from the - line in FIG. 1. 1... Carburetor, 2... Intake path, 3... Bench lily part,
4...Sliding valve, 5...Carburizer main body, 19...Diaphragm, 22...Negative pressure chamber, 23...Pressure chamber, 38...Communication path, 39...Radiation plate as heat radiation means.

Claims (1)

【実用新案登録請求の範囲】 (1) 気化器本体に内設された吸気道を横切つて摺
動可能な摺動弁の外端部に、吸気道のベンチユ
リ部に連通する負圧室と、該ベンチユリ部より
も上流側に連通し前記負圧室より吸気道側に位
置する圧力室とを画成するダイヤフラムが連結
される気化器において、前記圧力室と吸気道の
ベンチユリ部よりも上流側の部分とを連通する
連通路の途中、あるいは前記圧力室内に、吸気
道空気の熱を放熱する放熱手段が配設されるこ
とを特徴とする気化器。 (2) 前記放熱手段は、熱伝導性に優れた金属から
成る放熱板であり、該放熱板は気化器本体に接
触しかつ前記連通路から圧力室内への吸気道空
気の流通方向に対向して配置されることを特徴
とする実用新案登録請求の範囲第(1)項記載の気
化器。
[Claims for Utility Model Registration] (1) A negative pressure chamber communicating with the bench lily of the intake passage is provided at the outer end of the sliding valve that is slidable across the intake passage installed in the carburetor body. , in a carburetor connected to a diaphragm that defines a pressure chamber that communicates upstream of the vent lily portion and is located on the intake path side of the negative pressure chamber, the pressure chamber and the intake duct upstream of the vent lily portion; A vaporizer characterized in that a heat radiating means for radiating heat of intake air is disposed in the middle of a communication path that communicates with a side portion or in the pressure chamber. (2) The heat dissipation means is a heat dissipation plate made of a metal with excellent thermal conductivity, and the heat dissipation plate is in contact with the carburetor main body and is opposed to the flow direction of the intake air from the communication passage into the pressure chamber. The vaporizer according to claim (1) of the utility model registration, characterized in that the vaporizer is arranged as follows.
JP16048483U 1983-10-17 1983-10-17 vaporizer Granted JPS6066859U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16048483U JPS6066859U (en) 1983-10-17 1983-10-17 vaporizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16048483U JPS6066859U (en) 1983-10-17 1983-10-17 vaporizer

Publications (2)

Publication Number Publication Date
JPS6066859U JPS6066859U (en) 1985-05-11
JPS6329170Y2 true JPS6329170Y2 (en) 1988-08-05

Family

ID=30352969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16048483U Granted JPS6066859U (en) 1983-10-17 1983-10-17 vaporizer

Country Status (1)

Country Link
JP (1) JPS6066859U (en)

Also Published As

Publication number Publication date
JPS6066859U (en) 1985-05-11

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