JPS5840022B2 - Kuukibenshikikikaki - Google Patents
KuukibenshikikikakiInfo
- Publication number
- JPS5840022B2 JPS5840022B2 JP941475A JP941475A JPS5840022B2 JP S5840022 B2 JPS5840022 B2 JP S5840022B2 JP 941475 A JP941475 A JP 941475A JP 941475 A JP941475 A JP 941475A JP S5840022 B2 JPS5840022 B2 JP S5840022B2
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- valve
- air valve
- air
- passage
- 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
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【発明の詳細な説明】 本発明は、空気弁式気化器の改良（こ関する。[Detailed description of the invention] The present invention relates to improvements in air valve type vaporizers.
従来の空気弁式気化器を用いているエンジンでは、イグ
ニッションスイッチを切ってもエンジンがすぐには停止
しないという、いわゆるランオン現象が生じることがあ
る。In engines using conventional air valve carburetors, a so-called run-on phenomenon may occur, in which the engine does not stop immediately even after the ignition switch is turned off.
これは、イグニッションスイッチを切ったとき、惰性で
ピストンが少しでも動いていれば気化器を通して空気を
吸入し、空気弁の下方にある燃料吐出ノズルから燃料を
吸引し、この吸引された燃料が燃焼室内の熱によって燃
焼することＥこ原因がある。This means that when the ignition switch is turned off, if the piston is moving even slightly due to inertia, air is sucked through the carburetor, fuel is sucked from the fuel discharge nozzle located below the air valve, and this sucked fuel is combusted. The cause is combustion due to indoor heat.
従って、ランオン現象を防止するＥこは、イグニッショ
ンスイッチを切ったときに燃料吐出ノズルから燃料が出
ないようにすればよいことは明らかである。Therefore, it is clear that the best way to prevent the run-on phenomenon is to prevent fuel from coming out of the fuel discharge nozzle when the ignition switch is turned off.
従って、本発明の目的は、ランオンを有効に防止できる
構造を有する空気弁式気化器を提供することにある。Therefore, an object of the present invention is to provide an air valve type vaporizer having a structure that can effectively prevent run-on.
以下、添付図面を参照しながら本発明を実施例１こよっ
て説明しよう。Hereinafter, the present invention will be explained based on a first embodiment with reference to the accompanying drawings.
図を参照して、気化器本体１は、空気流路２を有し、こ
の空気流路ｆこは、その下方にはこれもまた普通構造の
スロットル弁４が設けである。Referring to the figure, a carburetor main body 1 has an air flow path 2, and a throttle valve 4 of a conventional structure is provided below the air flow path f.
空気弁３は、周知のように、制御ロッド５を介してダイ
アフラム装置６によって制御される。The air valve 3 is controlled by a diaphragm device 6 via a control rod 5 in a known manner.
空気弁３の反対端は、戻しばね７によって常に閉方向（
こ引張られている。The opposite end of the air valve 3 is always kept in the closing direction (
This is being pulled.
空気弁３のすぐ下には、燃料吐出ノズル８が開口してお
り、空気弁３が開いて流入してくる空気量（こ応じて燃
料を吐出するよう（こなっている。A fuel discharge nozzle 8 is opened immediately below the air valve 3, and fuel is discharged in response to the amount of air flowing in when the air valve 3 opens.
燃料の計量面積は、周知のように、空気弁３（こ連結さ
れた燃料制御リンク９（こよって制御されるよう（こな
っている。As is well known, the fuel metering area is controlled by the fuel control link 9 connected to the air valve 3.
本発明（こよれば、空気弁３とスロットル弁４との間で
空気流路２（こ開口した空気弁下部負圧通路１０（以下
、第１負圧通路とする）は、切換弁１１の切換室１２１
こ連通している。According to the present invention, the air valve lower negative pressure passage 10 (hereinafter referred to as the first negative pressure passage), which is opened between the air valve 3 and the throttle valve 4, is connected to the switching valve 11. Switching room 121
This is communicating.
この切換室１２（こは、ダイアフラム装置６の作動負圧
通路１３も連通しており、通常作動時（こは、空気弁３
とスロットル弁４の間の空気流路２内の負圧の大きさに
応じて、ダイアフラム装置６が空気弁３を開方向Ｅこ作
動させる。This switching chamber 12 (here, this also communicates with the operating negative pressure passage 13 of the diaphragm device 6, and during normal operation (here, the air valve 3
Depending on the magnitude of the negative pressure in the air flow path 2 between the throttle valve 4 and the throttle valve 4, the diaphragm device 6 operates the air valve 3 in the opening direction E.
切換弁１１は、第１負圧通路１０の他端と対向する軸線
方向孔１４を有し、この孔１４は、マニホルド負圧取出
通路１５（以下、第２負圧通路とする）を通じてスロッ
トル弁４の下方で空気流路２ｚこ連通している。The switching valve 11 has an axial hole 14 facing the other end of the first negative pressure passage 10, and this hole 14 is connected to the throttle valve through a manifold negative pressure outlet passage 15 (hereinafter referred to as the second negative pressure passage). The air flow path 2z is connected below the air flow path 4.
軸線方向孔１４は、切換室１２に開口しており、この開
口部は、弁体１６Ｅとよって開閉されるようｋこなって
おり、この弁体１６は、電磁作動装置１７）こよって作
動させられる。The axial hole 14 opens into the switching chamber 12, and this opening is opened and closed by a valve body 16E, which is actuated by an electromagnetic actuator 17). It will be done.
電磁作動装置１７は、イグニッションスイッチ１８を介
して電源１９に接続されており、イグニッションスイッ
チ１８を切ったときＥこ軸線方向孔１４を開き、第１負
圧通路１０を閉ざすようＥこ弁体１６を動かす。The electromagnetic actuator 17 is connected to a power source 19 via an ignition switch 18, and when the ignition switch 18 is turned off, the electromagnetic actuator 17 opens the E axis axial hole 14 and closes the first negative pressure passage 10. move.
イグニッションスイッチ１８を入れると、弁体１６が図
示位置に動かされて軸線方向孔１４を閉ざす。When the ignition switch 18 is turned on, the valve body 16 is moved to the position shown to close the axial hole 14.
切換弁１１の弁体１６が図示位置にあるとき、すなわち
イグニッションスイッチ１８が入れられてエンジンが作
動しているときＥこは、空気弁３は、第１負圧通路１０
を通して空気弁下部の空気流路２内の負圧に応じてダイ
アフラム装置６によって所期の開度まで開けられる。When the valve body 16 of the switching valve 11 is in the position shown, that is, when the ignition switch 18 is turned on and the engine is running, the air valve 3 is connected to the first negative pressure passage 10.
The air valve is opened to a desired opening degree by the diaphragm device 6 in response to the negative pressure in the air flow path 2 at the bottom of the air valve.
イグニッションスイッチ１８が切られると、切換弁１１
の弁体１６が軸線方向孔１４を開けて第２負圧通路１５
をダイアフラム装置６の作動負圧通路１３と接続すると
共に第１負圧通路１０を閉ざす。When the ignition switch 18 is turned off, the switching valve 11
The valve body 16 opens the axial hole 14 and opens the second negative pressure passage 15.
is connected to the operating negative pressure passage 13 of the diaphragm device 6, and the first negative pressure passage 10 is closed.
従って、マニホルド負圧がダイアフラム装置６を作動さ
せて空気弁３とスロットル弁４との間の負圧値とは無関
係に空気弁３を開ける。Therefore, the manifold vacuum actuates the diaphragm device 6 to open the air valve 3 independently of the vacuum value between the air valve 3 and the throttle valve 4.
よって、空気弁下部の負圧値が弱まり、燃料吐出ノズル
８から燃料を吸引することがない。Therefore, the negative pressure value at the lower part of the air valve is weakened, and fuel is not sucked from the fuel discharge nozzle 8.
従って、エンジンが惰性で運転し続けたとしても、燃料
の吸引がないのであるからランオン現象が生じることは
まったくなくなる。Therefore, even if the engine continues to coast, no run-on phenomenon will occur because there is no fuel suction.
図は、本発明によるランオン防止機構を備えた空気弁式
気化器の概略断面図である。
１・・・・・・気化器本体、２・・・・・・空気流路、
３・・・・・・空気弁、４・・・・・・スロットル弁、
６・・・・・・ダイアフラム装置、７・・・・・・ばね
、１０・・・・・・第１負圧通路、１１・・・・・・切
換弁、１５・・・・・・第２負圧通路、１７・・・・・
・電磁作動装置、１８・・・・・・イグニッションスイ
ッチ、１９・・・・・・電源。The figure is a schematic cross-sectional view of an air valve type vaporizer equipped with a run-on prevention mechanism according to the present invention. 1... Carburizer main body, 2... Air flow path,
3... Air valve, 4... Throttle valve,
6...Diaphragm device, 7...Spring, 10...First negative pressure passage, 11...Switching valve, 15...Nth 2 Negative pressure passage, 17...
- Electromagnetic actuator, 18...Ignition switch, 19...Power supply.
Claims (1)
気弁の下方で同じ空気流路に設けたスロットル弁と、前
記空気弁とスロットル弁の間で前記空気流路に開口して
いる第１負圧取出通路と、この通路に接続していてそこ
の負圧の大きさに応じて作動し、前記空気弁を開方向に
作動させる空気弁制御用ダイアフラム装置と、前記空気
弁を閉方向Ｅこ常Ｅこ引張っているばね装置とを包含す
る空気弁式気化器ｉこおいて、前記第１負圧取゛出通路
に設けた切換弁と、前記スロットル弁の下方で前記空気
流路Ｅこ開口していて他端を前記切換弁（こ接続してい
る第２の負圧取出通路と、前記切換弁に連続しており、
イグニッションスイッチを介して電源）こ接続しである
電磁作動装置であって前記イグニッションスイッチが切
られたときｋこ前記切換弁を作動させて前記ダイアフラ
ム装置を前記第１負圧通路との接続から前記第２負圧通
路との接続Ｅこ切換えるよう（こなっている電磁作動装
置とを包含することを特徴とする空気弁式気化器。1. An air valve provided in the air flow path E of the carburetor main body, a throttle valve provided below this air valve in the same air flow path, and an opening into the air flow path between the air valve and the throttle valve. a first negative pressure take-out passage connected to the passage, an air valve control diaphragm device that is connected to the passage and operates according to the magnitude of the negative pressure therein, and operates the air valve in the opening direction; In the air valve type carburetor i, which includes a spring device that is tensioned in the closing direction E, a switching valve provided in the first negative pressure extraction passage and a spring device under the throttle valve are connected to the air valve type carburetor. The flow path E is open and the other end is continuous with the switching valve (the second negative pressure extraction passage connected to the switching valve),
An electromagnetic actuating device is connected to a power source via an ignition switch, and when the ignition switch is turned off, the switching valve is actuated to change the diaphragm device from the connection to the first negative pressure passage. An air valve type vaporizer characterized in that it includes an electromagnetic actuator for switching the connection with the second negative pressure passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP941475A JPS5840022B2 (en) | 1975-01-21 | 1975-01-21 | Kuukibenshikikikaki |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP941475A JPS5840022B2 (en) | 1975-01-21 | 1975-01-21 | Kuukibenshikikikaki |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5183940A JPS5183940A (en) | 1976-07-22 |
| JPS5840022B2 true JPS5840022B2 (en) | 1983-09-02 |
Family
ID=11719717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP941475A Expired JPS5840022B2 (en) | 1975-01-21 | 1975-01-21 | Kuukibenshikikikaki |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840022B2 (en) |
-
1975
- 1975-01-21 JP JP941475A patent/JPS5840022B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5183940A (en) | 1976-07-22 |
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