JPS59120760A - Fuel feeding device for carburetor - Google Patents
Fuel feeding device for carburetorInfo
- Publication number
- JPS59120760A JPS59120760A JP22677582A JP22677582A JPS59120760A JP S59120760 A JPS59120760 A JP S59120760A JP 22677582 A JP22677582 A JP 22677582A JP 22677582 A JP22677582 A JP 22677582A JP S59120760 A JPS59120760 A JP S59120760A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- chamber
- nozzle
- valve
- fuel chamber
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
- F02M1/16—Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Means For Warming Up And Starting Carburetors (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、気化器の燃料室へ燃料を供給するための手動
ポンプを設けた燃料供給装置に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel supply device equipped with a manual pump for supplying fuel to a fuel chamber of a carburetor.
従来、エンジンの始動の際に、燃料の供給量を増加して
燃料温度を増しエンジンの始動を容易とするために、燃
料供給路中に加圧式の手動ポンプを設けて気化器の燃料
室に燃料を圧送し、あるいは燃料室のオーバフロ゛−通
路中に吸引式の手動ポンプを設けて燃料室に燃料を吸引
して燃料を供給していた。いずれの場合にも、燃料室と
ノズル口を連通するノズル通路は開放されているので、
燃料室に燃料を圧送する場合には燃料がノズル口から過
剰に噴出して、エンジンの始動を困難とし、あるいは、
燃料室に燃料を吸引して供給量る場合には、ノズル口か
ら空気を吸引してエンジンの始動を困難とすることがあ
った。また、外気温度の影響等により燃料タンクに内圧
が生じたとぎ、制御弁（フロートバルブ）を開放せしめ
るためのティクラーを作動させると、ノズル口から燃料
が過剰に流出し、あるいは、燃料タンクが負圧になった
ときには、ティクラーを作動させると、ノズル口から空
気を吸入して、いずれにしても、エンジンの始動困難あ
るいは回転不調を生ずることがあった。Conventionally, when starting an engine, a pressurized manual pump was installed in the fuel supply path and pumped into the fuel chamber of the carburetor in order to increase the amount of fuel supplied, raise the fuel temperature, and make it easier to start the engine. Fuel was supplied by pumping fuel or by providing a suction-type manual pump in the overflow passage of the fuel chamber to suck fuel into the fuel chamber. In either case, the nozzle passage that communicates the fuel chamber with the nozzle port is open, so
When fuel is forced into the fuel chamber, excessive fuel may be ejected from the nozzle opening, making it difficult to start the engine, or
When supplying fuel by sucking it into the fuel chamber, air may be sucked through the nozzle opening, making it difficult to start the engine. In addition, if internal pressure is generated in the fuel tank due to the influence of outside air temperature, etc., and the tickler is activated to open the control valve (float valve), excessive fuel may flow out from the nozzle port or the fuel tank may become negative. When the pressure reaches this level, when the tickler is activated, air is sucked in from the nozzle opening, which may cause difficulty in starting the engine or malfunctioning of the engine.
本発明は、燃料室に連通ずる手動ポンプを設け、この燃
料室とノズル口とを連通ずるノズル通路を開閉する開閉
弁を設け、この開閉弁を気化器の外部から操作自在の操
作部を設けることにより、ノズル口からの過剰な燃料の
流出をなくし、あるいはノズル口から燃料室へ空気を吸
入することをなくして、エンジンの始動を容易に行なわ
しめようどす゛るものである。The present invention provides a manual pump that communicates with a fuel chamber, an on-off valve that opens and closes a nozzle passage that communicates the fuel chamber with a nozzle port, and an operating part that can freely operate this on-off valve from outside the carburetor. This eliminates the outflow of excess fuel from the nozzle port or the intake of air into the fuel chamber from the nozzle port, thereby making it easier to start the engine.
以１ぐ、図面により本発明の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、１は気化器、３は燃料タンク
を示すものである。気化器１はつき゛のＪ、うに構成さ
れでいる。すなわち、５は本体７の下部に設けたダイア
フラムで、上方に燃料室９．干すに気圧室１１が形成さ
れている。１３は制御弁１５を介して燃料室９に連通す
る燃料供給路で、途中にダイアフラムポンプ１７が設け
られ、ダイアフラム１８の背後の加圧室１つはエンジン
のクランクケース（図示せず）に連通し、クランクケー
ス内の圧力の変化に応じて作動して、ダイアフラム１８
が揺動しで逆止弁２１．ポンプ室２３゜逆止弁２５を経
−７燃料を送るものである。２７は一端に制御弁１５の
下端を支持するアームで、軸２９によって揺動自在に相
克され、弾機３１によって制御弁１５をＦ１１鎖する方
向にイ」勢されている。In FIGS. 1 and 2, 1 indicates a carburetor and 3 indicates a fuel tank. The carburetor 1 is constructed as follows. That is, 5 is a diaphragm provided at the bottom of the main body 7, and a fuel chamber 9 is provided above. A pressure chamber 11 is formed for drying. Reference numeral 13 denotes a fuel supply path that communicates with the fuel chamber 9 via a control valve 15. A diaphragm pump 17 is provided in the middle, and one pressurized chamber behind the diaphragm 18 communicates with the engine crankcase (not shown). The diaphragm 18 operates in response to changes in pressure within the crankcase.
The check valve 21. The fuel is sent through the pump chamber 23 through the check valve 25. An arm 27 supports the lower end of the control valve 15 at one end, is swingably supported by a shaft 29, and is urged by a bullet 31 in the direction of chaining the control valve 15 F11.
３３は上端をダイアフラム５に固着され、上端は本体７
の下部に突出して設けられた操作部、３５は操作部３３
を下方向に付勢づる弾機である。３７はエンジンの吸気
口（図示せず〉に連通する空気流路３９に開口するノズ
ル口４１と燃料室９とを連通ずるノズル通路、４３はノ
ズル［」４１を調節するためのニードル弁、４５はノズ
ル通路３７を調節するニードル弁である。４７はノズル
通路３７４開閉する開閉弁で、燃料室９に開口づ゛るシ
リンタ一部４９と、シリンダ一部４９内に１習動自在の
弁体５１とよりなる。シリンダ一部４９はオーバフロー
通路５３．オーバフローバイブ５５を経て燃料タンク３
に連通している。弁体５１は手Ｃｉ：はアーム２７を介
して操作部３３に当接し、上端は弾機５７によって下方
に付勢されている。５つは弁体５１の側面に開口する連
通孔で、弁体５１の内部の空間部６１に連通し、弁体５
１が上背時には燃料室９どオーバフロー通路５３とを連
通し、弁体５１が下降したとき、ノズル通路３７に連通
づる円周面６３に連通づる。６５は燃料室９と燃料タン
ク３とを連通ずる燃料供給路１３中に設（プたゴム製の
手動ポンプで、ポンプ室６６を備え、下端はホース６７
を介して燃料タンク３内のフィルター６９．逆止弁７１
に連通している。７３は燃料タンク３の注入口の７５の
ぶ￥で、内部に逆止弁７７が設けられている。The upper end of 33 is fixed to the diaphragm 5, and the upper end is fixed to the main body 7.
An operating section 35 is provided protruding from the bottom of the operating section 33.
It is a bullet that urges downward. 37 is a nozzle passage that communicates the fuel chamber 9 with a nozzle port 41 that opens into an air flow path 39 that communicates with an intake port (not shown) of the engine; 43 is a needle valve for adjusting the nozzle 41; 45 Reference numeral 47 indicates a needle valve that adjusts the nozzle passage 37. Reference numeral 47 indicates an on-off valve that opens and closes the nozzle passage 374, and includes a cylinder part 49 that opens into the fuel chamber 9, and a valve body that can freely move within the cylinder part 49. 51. The cylinder part 49 passes through an overflow passage 53 and an overflow vibe 55 to the fuel tank 3.
is connected to. The valve body 51 comes into contact with the operating section 33 via the arm 27, and its upper end is urged downward by the bullet 57. 5 is a communication hole that opens on the side surface of the valve body 51 and communicates with the space 61 inside the valve body 51;
1 communicates with the fuel chamber 9 and the overflow passage 53 when it is on the upper back, and communicates with the circumferential surface 63 that communicates with the nozzle passage 37 when the valve body 51 is lowered. 65 is a manual pump made of rubber installed in the fuel supply path 13 that communicates the fuel chamber 9 and the fuel tank 3, and has a pump chamber 66 and a hose 67 at the lower end.
filter 69. in the fuel tank 3 via the filter 69. Check valve 71
is connected to. Reference numeral 73 denotes an inlet 75 of the fuel tank 3, and a check valve 77 is provided inside.
以上の実施例において、エンジンを始動づ−る際には、
作業者は手指で操作部３３を上方に押圧しつつ、手動ポ
ンプ６５を押圧作動せしめれば、制り１１弁１５が開く
とともに、弁体５１を１臂せしめ、ノズル通路３７を閉
鎖し、同時にオーバフロー通路５３を燃料室９に連通せ
しめる。また手動ポンプ６５の作動により、燃料タンク
３内の燃料は逆止弁７１．２１，２５を押し聞いて制御
弁１５から燃料室９内に入る。このときノズル通路３７
は閉鎖されているので、ノズル口４１から燃料が過剰に
流出することがなく、燃料室９に燃料を充満づ−ること
ができるものである。操作部３３の操作を止めで、また
手動ポンプ６５の作動を中止して、エンジンを始動せし
めれば、ダイアフラムポンプ１７の作動により燃料が供
給されるものである。In the above embodiment, when starting the engine,
When the operator presses the operating part 33 upward with his fingers and operates the manual pump 65, the control 11 valve 15 opens, the valve body 51 is moved to one arm, and the nozzle passage 37 is closed. The overflow passage 53 is made to communicate with the fuel chamber 9. Further, due to the operation of the manual pump 65, the fuel in the fuel tank 3 pushes against the check valves 71, 21, 25 and enters the fuel chamber 9 from the control valve 15. At this time, the nozzle passage 37
Since the nozzle port 41 is closed, fuel does not excessively flow out from the nozzle port 41, and the fuel chamber 9 can be filled with fuel. If the engine is started by stopping the operation of the operating section 33 or by stopping the operation of the manual pump 65, fuel is supplied by the operation of the diaphragm pump 17.
第３図は第２の実施例を示ずもので、吸引式の手動ポン
プ７つはオーバフロー通路５３に連通して設けられ、内
部に逆止弁８１，８３が設けられている。操作部３３と
手動ポンプ７９を操作すれは、制御弁１５が開き、同時
にノズル通路３７が閉鎖されるとともに、オーバフロー
通路５３が連通して、燃料室９内の空気は吸入され、燃
料タンク３の燃料は燃料供給路１３から燃料室９内に吸
引され、燃料室９が充満すると、過剰な燃料はオーバフ
ロー通路５３１手動ポンプ７９．オーバフローバイブ５
５を介して燃料タンク３に戻るものである。FIG. 3 does not show the second embodiment, in which seven suction type manual pumps are provided in communication with the overflow passage 53, and check valves 81 and 83 are provided inside. When operating the operating section 33 and the manual pump 79, the control valve 15 opens, the nozzle passage 37 is closed at the same time, the overflow passage 53 is opened, and the air in the fuel chamber 9 is sucked, and the air in the fuel tank 3 is opened. Fuel is drawn into the fuel chamber 9 from the fuel supply passage 13, and when the fuel chamber 9 is full, excess fuel is removed from the overflow passage 531 manual pump 79. overflow vibe 5
5 to return to the fuel tank 3.
第４図は、第３の実施例を示すもので、ノズル通路３７
を開閉する開閉弁８５の弁体８７を固着する弁アーム８
つを揺動自在に枢着し、またオーバフロー通路５３を開
閉するオーバフロー弁９１を設け、外部から操作自在の
操作部３３にΔ−バフロー弁９１．開閉弁８５が連動し
ている。FIG. 4 shows a third embodiment, in which the nozzle passage 37
Valve arm 8 fixes the valve body 87 of the on-off valve 85 that opens and closes the valve.
An overflow valve 91 for opening and closing the overflow passage 53 is provided, and a Δ-buffflow valve 91. An on-off valve 85 is interlocked.
本発明は、請求の範囲に記載のとおりの構成であるから
、ノズル口から過剰な燃料が流出し、あるいはノズル口
から燃料室に空気が吸入されて、エンジンの始動を国難
とすることを防仕して、エンジンを容易に始動すること
ができるものである。Since the present invention has the configuration as described in the claims, it is possible to prevent starting the engine from becoming a national disaster due to excessive fuel flowing out from the nozzle port or air being sucked into the fuel chamber from the nozzle port. This allows the engine to be started easily.
なＪ３、本発明は前述の実施例に限定されるものＣ９よ
なく、油の態様においても実施しうるものである。また
、請求の範囲にポリ符号は本発明の技術的範囲を限定す
るものではない。J3, the present invention is not limited to the above embodiments, but can also be implemented in the form of oil. Further, poly symbols in the claims do not limit the technical scope of the present invention.
第１図は本発明の１実施例の側１１ｉ面図、第２図は要
部の拡大側断面図、第３図は第２の実施例の側断面図、
第４図は第３の実施例の要部の側［・ｊｌｉ而図面ある
。
（図面の主要４τ部分を表ね′？ｌ符号の説明）１・・
・気化器 ９・・・燃料室３３・・・操作部
３７・・・ノズル通路４１・・・ノズル「１
４７・・・開閉弁６５・・・手動ポンプ
特 許 出願人 小松ＩＺノア株式会７１１ ＼
９７１FIG. 1 is a side 11i side view of one embodiment of the present invention, FIG. 2 is an enlarged side sectional view of the main part, and FIG. 3 is a side sectional view of the second embodiment.
FIG. 4 is a side view of the main part of the third embodiment. (Represents the main 4τ part of the drawing. Explanation of the symbol) 1...
・Carburizer 9...Fuel chamber 33...Operation unit 37...Nozzle passage 41...Nozzle "1"
47...Opening/closing valve 65...Manual pump patent Applicant: Komatsu IZ Noah Co., Ltd. 711 ＼ 971
Claims (1)
記燃料室９に連通して設け、前記燃料室９とノズル口４
１とを連通ずるノズル通路３７を開閉する開閉弁４７を
設け、面記開閉弁４７を気化器１の外部から操作自在の
操作部３３を設けたことを特徴とする気化器の燃料供給
装置。A manual pump 65 for supplying fuel to the fuel chamber 9 is provided in communication with the fuel chamber 9, and the fuel chamber 9 and the nozzle port 4 are connected to each other.
1. A fuel supply device for a carburetor, characterized in that an on-off valve 47 is provided to open and close a nozzle passage 37 that communicates with the carburetor 1, and an operating section 33 is provided that allows the surface on-off valve 47 to be operated from outside the carburetor 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22677582A JPS59120760A (en) | 1982-12-27 | 1982-12-27 | Fuel feeding device for carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22677582A JPS59120760A (en) | 1982-12-27 | 1982-12-27 | Fuel feeding device for carburetor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59120760A true JPS59120760A (en) | 1984-07-12 |
Family
ID=16850412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22677582A Pending JPS59120760A (en) | 1982-12-27 | 1982-12-27 | Fuel feeding device for carburetor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59120760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61190456U (en) * | 1985-05-21 | 1986-11-27 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4835232A (en) * | 1971-09-10 | 1973-05-24 |
-
1982
- 1982-12-27 JP JP22677582A patent/JPS59120760A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4835232A (en) * | 1971-09-10 | 1973-05-24 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61190456U (en) * | 1985-05-21 | 1986-11-27 |
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