JPS647232Y2 - - Google Patents
Info
- Publication number
- JPS647232Y2 JPS647232Y2 JP1982126887U JP12688782U JPS647232Y2 JP S647232 Y2 JPS647232 Y2 JP S647232Y2 JP 1982126887 U JP1982126887 U JP 1982126887U JP 12688782 U JP12688782 U JP 12688782U JP S647232 Y2 JPS647232 Y2 JP S647232Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- throttle valve
- valve
- liquid
- air
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 14
- 239000006200 vaporizer Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 31
- 239000002828 fuel tank Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Nozzles (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
【考案の詳細な説明】
本考案は、空気通路を開閉するスロツトル弁の
下方位置に、空気通路の底面に開口する補助ノズ
ル口を設けた気化器に係るものである。[Detailed Description of the Invention] The present invention relates to a carburetor that is provided with an auxiliary nozzle opening that opens at the bottom of the air passageway below a throttle valve that opens and closes the air passageway.
従来、この種の気化器においては、補助ノズル
口は3個並設されていて、アイドル回転時にはス
ロツトル弁は閉鎖して、空気はスロツトル弁の下
縁に設けた切欠孔からのみ流れ、補助ノズル口は
第5図に示すごとく、流れの後方側の1個がスロ
ツトル弁より後方(流れの後方すなわちシリンダ
ー側)にあり、この1個の補助ノズル口からのみ
燃料が噴出される。スロツトル弁を少し開くと、
スロツトル弁と空気通路底面と、スロツトル弁と
空気通路底面との間にせまい間隙ができて、空気
は速い速度で流れるので、3個の補助ノズルから
燃料が噴出される。すなわち、スロツトル弁を開
くにつれて、補助ノズル口の燃料の噴出は1個か
ら3個に変わるが、この変化が段階的で連続性が
なく、エンジンの回転速度を微調整することがで
きなかつた。 Conventionally, in this type of carburetor, three auxiliary nozzle ports were installed in parallel, and during idle rotation, the throttle valve was closed, and air flowed only through the notch hole provided at the lower edge of the throttle valve. As shown in FIG. 5, one of the ports on the rear side of the flow is located behind the throttle valve (rear of the flow, that is, on the cylinder side), and fuel is injected only from this one auxiliary nozzle port. When you open the throttle valve a little,
Since a narrow gap is formed between the throttle valve and the bottom of the air passage, and the air flows at a high speed, fuel is ejected from the three auxiliary nozzles. That is, as the throttle valve is opened, the number of fuel jets from the auxiliary nozzle port changes from one to three, but this change is gradual and not continuous, making it impossible to finely adjust the rotational speed of the engine.
本考案は、空気通路の底面に、閉鎖位置におけ
るスロツトル弁の下縁の前後方向位置にわたつて
連続して開口する補助ノズル口を設け、この補助
ノズル口に多孔性の材料よりなる含液体を嵌挿す
ることにより、スロツトル弁の閉鎖位置から徐々
に開放する際に、燃料の噴出を連続して増加する
ことができてエンジンの回転速度をアイドル回転
から連続して上昇せしめることができ、回転速度
の微調整を可能としようとするものである。 In the present invention, an auxiliary nozzle opening is provided at the bottom of the air passageway, and the auxiliary nozzle opening is continuously opened across the front and back positions of the lower edge of the throttle valve in the closed position. By fitting the throttle valve, when the throttle valve is gradually opened from the closed position, the fuel injection can be continuously increased, and the engine speed can be continuously increased from the idle speed. This is intended to enable fine adjustment of speed.
以下、図面により本考案の1実施例について詳
細な説明を行なう。 Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第1図,第2図において、総括的に示す1は気
化器を示すもので、エンジンのシリンダー3に開
口する吸気口5に取付中間体7を介して連通,固
着している。9はシリンダー3内を往復摺動する
ピストンである。取付中間体7はシリンダー3の
熱が気化器1に伝達することを防止するために合
成樹脂等の断熱材で形成され、内部に連通孔11
が設けられている。17は気化器1に連通,固着
するエアクリナーで、クリナーケース19と蓋部
21との間に濾過体23が挾持,固定されてい
る。25および27は蓋部21および濾過体ケー
ス29にそれぞれ設けた多数の連通孔である。 In FIGS. 1 and 2, the general reference numeral 1 indicates a carburetor, which communicates with and is fixed to an intake port 5 opening into a cylinder 3 of an engine via a mounting intermediate 7. 9 is a piston that slides back and forth within the cylinder 3. The mounting intermediate body 7 is made of a heat insulating material such as synthetic resin in order to prevent the heat of the cylinder 3 from being transmitted to the carburetor 1, and has a communication hole 11 inside.
is provided. An air cleaner 17 communicates with and is fixed to the vaporizer 1, and a filter body 23 is sandwiched and fixed between the cleaner case 19 and the lid 21. Reference numerals 25 and 27 indicate a large number of communication holes provided in the lid portion 21 and the filter case 29, respectively.
気化器1はつぎのように構成されている。すな
わち、31はゴム膜性のダイアフラムで、1側面
の圧力室33は接手35を介してエンジンのクラ
ンク室(図示せず)に連通し、クランク室の圧力
に対応して往復揺動し、他側面のポンプ室37に
給油接手39を介して燃料タンク(図示せず)か
ら燃料を吸引し、連通孔41,弁43を介して燃
料室45に送油するものである。47,49はリ
ード弁,51,53は濾過体である。55は燃料
室45の底面を形成するゴム膜のダイアフラム,
57は軸59によつて燃料室45に枢着された揺
動杆で、一端は弁43に連結し、他端はダイアフ
ラム55に固着する押圧板60に連結し、弾機6
1によつて弁43を閉鎖する方向に付勢してい
る。63は気化器1を貫通する空気通路65に開
口する主ノズルで、内部に逆止弁67が設けら
れ、弁孔68,調節弁69を介して燃料室45に
連通している。71は補助ノズル口で、多孔性の
合成樹脂よりなる含液体73が嵌挿され、連通路
77から調節弁79を介して燃料室45に連通し
ている。81は空気通路65の入口側を開閉する
チヨーク弁,83は出口側に設けられ切欠孔85
を備えたスロツトル弁である。 The vaporizer 1 is constructed as follows. That is, 31 is a rubber membrane diaphragm, and a pressure chamber 33 on one side is connected to the engine crank chamber (not shown) through a joint 35, and swings back and forth in response to the pressure in the crank chamber. Fuel is sucked from a fuel tank (not shown) into a side pump chamber 37 through a fuel supply fitting 39, and is sent to a fuel chamber 45 through a communication hole 41 and a valve 43. 47 and 49 are reed valves, and 51 and 53 are filter bodies. 55 is a rubber membrane diaphragm forming the bottom surface of the fuel chamber 45;
A swing rod 57 is pivotally connected to the fuel chamber 45 by a shaft 59. One end is connected to the valve 43, the other end is connected to a pressing plate 60 fixed to the diaphragm 55, and the swing rod 57 is connected to the fuel chamber 45 by a shaft 59.
1 biases the valve 43 in the direction of closing. A main nozzle 63 opens into an air passage 65 passing through the carburetor 1. A check valve 67 is provided inside the main nozzle, and the main nozzle 63 communicates with the fuel chamber 45 through a valve hole 68 and a control valve 69. Reference numeral 71 denotes an auxiliary nozzle port into which a liquid-containing port 73 made of porous synthetic resin is inserted, and communicates with the fuel chamber 45 from a communication passage 77 via a control valve 79 . 81 is a check valve that opens and closes the inlet side of the air passage 65; 83 is provided on the outlet side of the notch hole 85;
It is a throttle valve equipped with.
以上の実施例において、エンジンの回転にとも
なつて、ピストン9が往復し、上昇時に吸気口5
を開くと、ピストン9の下方のクランク室(図示
せず)の負圧により、空気がエアクリナー17の
濾過体23を通過して、気化器1の空気通路65
を通り取付中間体7の連通孔11を経て吸気口5
に吸引される。燃料は燃料タンク(図示せず)か
ら、クランク室(図示せず)の正負の圧力によつ
て揺動するダイアフラム31の作動により、給油
接手39からポンプ室37に入り、連通孔41を
経て燃料室45内に入る。燃料室45内に燃料が
充満するとダイアフラム55が下方に移動し、揺
動杆57を介して弁43を閉鎖する。逆に燃料室
45内の燃料が減少すると、反対にダイアフラム
55が上方に移動し、弁43が開いて燃料が燃料
室45内に入る。チヨーク弁81,スロツトル弁
83を第1図の姿勢に位置せしめると、燃料室4
5内の燃料は調節弁69,弁孔68を経て主ノズ
ル63から空気通路65に吸引され空気に混合す
る。同時に連通路77,調節弁79を経て補助ノ
ズル口71の含液体73からも燃料が噴出し、エ
ンジンは高速で回転する。またスロツトル弁83
を第1図の鎖線で示す姿勢のアイドル位置に操作
すると、主ノズル63からの燃料の噴出は停止
し、補助ノズル口71から含液体73を通過した
燃料が噴出する。スロツトル弁83が完全に閉鎖
した状態では空気は切欠孔85から吸い込まれ、
燃料は含液体73の、スロツトル弁83が当接し
ている位置よりも後方(シリンダー3側)の負圧
の部分からのみ噴出している。スロツトル弁83
を徐々に開放すると、空気がスロツトル弁83と
含液体73との間隙を流れはじめて、含液体73
の燃料の噴出する負圧の部分は連続的に次第に拡
がつて、ついには含液体73の全面から噴出する
ようになる。 In the above embodiment, the piston 9 reciprocates as the engine rotates, and when the piston 9 rises, the intake port 5
When opened, the negative pressure in the crank chamber (not shown) below the piston 9 causes air to pass through the filter body 23 of the air cleaner 17 and enter the air passage 65 of the carburetor 1.
through the air intake port 5 through the communication hole 11 of the mounting intermediate body 7.
is attracted to. Fuel enters the pump chamber 37 from the fuel tank (not shown) through the fuel supply fitting 39 by the operation of the diaphragm 31, which swings depending on the positive and negative pressure in the crank chamber (not shown), and flows through the communication hole 41 into the fuel tank. Enter room 45. When the fuel chamber 45 is filled with fuel, the diaphragm 55 moves downward and closes the valve 43 via the swinging rod 57. Conversely, when the fuel in the fuel chamber 45 decreases, the diaphragm 55 moves upward, the valve 43 opens, and fuel enters the fuel chamber 45. When the choke valve 81 and the throttle valve 83 are positioned in the position shown in FIG.
The fuel in the main nozzle 63 is sucked into the air passage 65 through the control valve 69 and the valve hole 68, and mixed with the air. At the same time, fuel is also ejected from the liquid-containing 73 of the auxiliary nozzle port 71 via the communication passage 77 and the control valve 79, and the engine rotates at high speed. Also, the throttle valve 83
When the main nozzle 63 is operated to the idle position shown by the dashed line in FIG. 1, the ejection of fuel from the main nozzle 63 is stopped, and the fuel that has passed through the liquid-containing 73 is ejected from the auxiliary nozzle port 71. When the throttle valve 83 is completely closed, air is sucked in through the cutout hole 85.
Fuel is ejected only from the negative pressure part of the liquid-containing liquid 73 that is rearward (on the cylinder 3 side) of the position where the throttle valve 83 is in contact. Throttle valve 83
When the throttle valve 83 is gradually opened, air begins to flow through the gap between the throttle valve 83 and the liquid-containing 73.
The negative pressure part where the fuel is ejected gradually expands continuously, and finally comes to be ejected from the entire surface of the liquid-containing liquid 73.
本考案は請求の範囲のとおりの構成であるの
で、つぎのような効果を有するものである。すな
わち、(1)スロツトル弁をアイドル回転位置から次
第に開いて、エンジンの回転速度を徐々に速くす
る際に、燃料の噴出を連続して増加することがで
き、回転速度を連続的に速くすることができて微
調整を行なうことができる。(2)含液体に燃料を含
んでいるので、急加速性がよい。(3)含液体の通過
抵抗があるので急減速の際、燃料が慣性力で流出
することがなく減速性が良い。(4)補助ノズル口の
精度を必要とせず加工が容易となる。 Since the present invention is configured as claimed, it has the following effects. That is, (1) when the throttle valve is gradually opened from the idle rotational position to gradually increase the rotational speed of the engine, the fuel injection can be continuously increased, and the rotational speed can be continuously increased. You can make fine adjustments. (2) Since the liquid contains fuel, rapid acceleration is good. (3) Since there is resistance to the passage of liquid, the fuel does not flow out due to inertia during sudden deceleration, resulting in good deceleration performance. (4) Machining is easy because the precision of the auxiliary nozzle port is not required.
なお、第3図は第2の実施例を示すもので、液
が通過し易くするために適宜位置に裏面に凹部8
7を設けたものである。また上面に突起89を設
ければ、燃料の霧化性能が向上するものである。
第4図は第3の実施例を示すもので、適宜位置に
凹部87とノズル孔91を設けて燃料の噴出をさ
らに良好としたものである。 Note that FIG. 3 shows a second embodiment, in which recesses 8 are provided on the back surface at appropriate positions to facilitate the passage of liquid.
7. Moreover, if the projection 89 is provided on the upper surface, the atomization performance of the fuel will be improved.
FIG. 4 shows a third embodiment, in which recesses 87 and nozzle holes 91 are provided at appropriate positions to further improve fuel injection.
また第5図はスロツトル弁83の閉鎖時におけ
る従来の補助ノズル口93,95,97を示し、
第6図はスロツトル弁83の少し開いたときの従
来の補助ノズル口を示すものである。 FIG. 5 also shows the conventional auxiliary nozzle ports 93, 95, 97 when the throttle valve 83 is closed.
FIG. 6 shows the conventional auxiliary nozzle port when the throttle valve 83 is slightly opened.
なお、本考案は前述の実施例に限定されたもの
ではなく、他の態様においても実施しうるもので
ある。また、請求の範囲に示す符号は本考案の技
術的範囲を限定するものではない。 Note that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.
第1図、第2図はそれぞれ本考案の1実施例の
側断面図、同正断面図、第3図、第4図はそれぞ
れ第2、第3の実施例の要部の側断面図、第5
図、第6図は従来の補助ノズル口の作動状態を示
す側断面図である。
図面の主要な部分を表わす符号の説明、1……
気化器、5……吸気口、7……取付中間体、11
……連通孔、65……空気通路、71……補助ノ
ズル口、73……含液体、83……スロツトル
弁。
1 and 2 are side sectional views and front sectional views of one embodiment of the present invention, respectively; FIGS. 3 and 4 are side sectional views of essential parts of the second and third embodiments, respectively; Fifth
6 are side sectional views showing the operating state of a conventional auxiliary nozzle port. Explanation of the symbols representing the main parts of the drawing, 1...
Carburetor, 5...Intake port, 7...Mounting intermediate body, 11
... Communication hole, 65 ... Air passage, 71 ... Auxiliary nozzle port, 73 ... Liquid containing, 83 ... Throttle valve.
Claims (1)
スロツトル弁83を設け、前記空気通路65の底
面に、閉鎖位置における前記スロツトル弁83の
下縁の前後方向位置にわたつて連続して開口する
補助ノズル口71を設け、前記補助ノズル口71
に多孔性材料よりなる含液体73を嵌挿して設け
たことを特徴とする気化器。 A swingable throttle valve 83 that opens and closes the air passage 65 in the horizontal direction is provided, and an auxiliary throttle valve 83 is provided on the bottom surface of the air passage 65 to continuously open the lower edge of the throttle valve 83 in the closed position. A nozzle port 71 is provided, and the auxiliary nozzle port 71
A vaporizer characterized in that a liquid-containing liquid 73 made of a porous material is inserted into the vaporizer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12688782U JPS5932157U (en) | 1982-08-24 | 1982-08-24 | vaporizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12688782U JPS5932157U (en) | 1982-08-24 | 1982-08-24 | vaporizer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5932157U JPS5932157U (en) | 1984-02-28 |
JPS647232Y2 true JPS647232Y2 (en) | 1989-02-27 |
Family
ID=30288369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12688782U Granted JPS5932157U (en) | 1982-08-24 | 1982-08-24 | vaporizer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5932157U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52140724A (en) * | 1976-05-20 | 1977-11-24 | Ibbott Jack Kenneth | Improvement in fuel supply port communicating with the inside of carburetor for internal combustion engine |
JPS54158529A (en) * | 1978-06-02 | 1979-12-14 | Nippon Carbureter | Low speed system of carbureter |
-
1982
- 1982-08-24 JP JP12688782U patent/JPS5932157U/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52140724A (en) * | 1976-05-20 | 1977-11-24 | Ibbott Jack Kenneth | Improvement in fuel supply port communicating with the inside of carburetor for internal combustion engine |
JPS54158529A (en) * | 1978-06-02 | 1979-12-14 | Nippon Carbureter | Low speed system of carbureter |
Also Published As
Publication number | Publication date |
---|---|
JPS5932157U (en) | 1984-02-28 |
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