JPS60204951A - Starting fuel feeder of diaphragm type carburetor - Google Patents
Starting fuel feeder of diaphragm type carburetorInfo
- Publication number
- JPS60204951A JPS60204951A JP6194484A JP6194484A JPS60204951A JP S60204951 A JPS60204951 A JP S60204951A JP 6194484 A JP6194484 A JP 6194484A JP 6194484 A JP6194484 A JP 6194484A JP S60204951 A JPS60204951 A JP S60204951A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- starting
- carburetor
- tank
- diaphragm
- 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】
ダイヤ７２ム型気化器のメタリング室と連通する吸引式
１２イマーボンプの吐出燃料を、パイスタータ一式始動
装置の燃料溜り室に導き、この燃料溜プ室に設けた排出
口よシ溢出する燃料を燃料タンクへ還流し、燃料溜り室
を定油面に設定する事によシバイスタータ一式始動装置
による始動混合気濃度を均一安定化すると共に、始動燃
料の消費流出により燃料溜り基油面が降下し、始動混合
気か略々一定時間で途切れ自動的に媛機運転を完了する
特徴を有するダイヤ７２ム型気化器の始動燃料供給装置
に関するものである。[Detailed description of the invention] The discharged fuel of the suction type 12 immersion pump, which communicates with the metering chamber of the 72-mm diamond carburetor, is guided to the fuel reservoir chamber of the pie starter complete set starting device, and the discharge port provided in this fuel reservoir chamber By returning overflowing fuel to the fuel tank and setting the fuel reservoir chamber at a constant oil level, the starting mixture concentration of the Shiba starter complete starting device is stabilized uniformly, and the fuel reservoir is This invention relates to a starting fuel supply system for a 72-diameter carburetor, which has the characteristic that when the base oil level drops, the starting air-fuel mixture is interrupted after a substantially fixed period of time, and the engine operation is automatically completed.
ダイヤフラム型気化器は携帯作業機、例へばチェンソー
、刈払機等に使用されているが、作業機底部にある燃料
タンクより燃料ポンプにより気化器へ燃料を吸引圧送し
、どの様な運転姿勢でも常にメタリング室内を一定負圧
に保つ事により全方位運転を可能とする機能を有してい
る事は広く知られゐ所である。Diaphragm type carburetors are used in portable working machines, such as chain saws and brush cutters, and the fuel is pumped from the fuel tank at the bottom of the working machine to the carburetor by suction and pressure, ensuring constant metering regardless of the operating position. It is widely known that it has a function that enables omnidirectional operation by maintaining a constant negative pressure inside the room.
然し乍ら燃料タンクが作業機底部にある為めエンジン始
動前は燃料タンク上部の燃料管、気化器内は空気で満た
されてを）、特に作業終了でエンジン停止后１０数分前
后はエンジンの伝導熱、雰囲気熱、日照による輻射熱等
の為め燃料ペーパーで満され、エンジ〉′は未だ媛機状
態にあっても始動困難、始動后運転継続困ＪＩＮＩの不
具合があった。However, since the fuel tank is located at the bottom of the work machine, before the engine starts, the fuel pipe at the top of the fuel tank and the inside of the carburetor are filled with air), especially after 10 minutes or so after the engine is stopped at the end of the work, the conduction heat of the engine increases. Due to atmospheric heat, radiant heat from sunlight, etc., the engine was filled with fuel paper, making it difficult to start even though the engine was still in its prime state, and had problems such as difficulty in continuing operation after starting.
この為め始動前に燃料タンク上部の燃料管、気化器内の
空気、燃料ペーパーを吸引して燃料を導入充満する為め
メタリング室に連通ずる吸引式プライマーボングを設け
、燃料タンクよシ吸引した余剰燃料を外部に放出するも
のは同一出願人により既に出願され、商品化もされてい
る。For this reason, before starting, a suction type primer bong was installed that communicated with the metering chamber to suck in the fuel pipe at the top of the fuel tank, the air in the carburetor, and the fuel paper to introduce and fill the fuel. The same applicant has already filed an application for a device that releases surplus fuel to the outside, and it has also been commercialized.
本発明はこの吸引式プライマーボングの余剰燃料を外部
に放出せず、パイスタータ一式始動装置の燃料滴シ室に
導き、この燃料溜り室に設けた排出口より湿田する燃料
を燃料タンクへ還流し、燃料溜シ室内な定油面に設定す
る事によシ始動混合気濃度を均一安定化すると共に始動
燃料の消費流出により燃料宿り定油面が降下し、始動混
合気が一定時間で途切れ自動的に煙機運転が完了する特
徴を有すゐダイヤフラム屋気化器の始動燃料供給装置に
関するものである。In the present invention, the surplus fuel from the suction type primer bong is not discharged to the outside, but is guided into the fuel droplet chamber of the pie starter complete starting device, and the wet fuel is returned to the fuel tank from the discharge port provided in this fuel reservoir chamber. By setting the oil level in the fuel reservoir chamber to a constant oil level, the starting mixture concentration is stabilized uniformly, and as the starting fuel is consumed and flows out, the fuel stagnation oil level drops, and the starting mixture is cut off after a certain period of time and is automatically activated. This invention relates to a starting fuel supply system for a diaphragm carburetor, which has the feature that smoke machine operation is completed immediately.
図面について説明すると第１図は本発明実施例要部の縦
断面図である。Referring to the drawings, FIG. 1 is a vertical cross-sectional view of a main part of an embodiment of the present invention.
図に於て、１は燃料タンク、２はダイヤフラム聾気化器
、３は気化器本体、４は燃料ポンプカッ（−１５は図示
していないエンジンクランク室の脈動圧導入口、６は燃
料ポンプダイヤ７２ム、７は燃料流入口で図中点線の如
く燃料タンク１の底部に連通してをシ、エンジンクラン
ク室の脈動圧によるボン１作用で燃料を吸引吐出し流入
弁８に圧送される。In the figure, 1 is the fuel tank, 2 is the diaphragm deaf carburetor, 3 is the carburetor body, 4 is the fuel pump cup (-15 is the pulsating pressure inlet of the engine crank chamber (not shown), and 6 is the fuel pump diamond 72). A fuel inlet port 7 is connected to the bottom of the fuel tank 1 as shown by the dotted line in the figure, and the fuel is sucked and discharged by the action of the cylinder 1 due to the pulsating pressure in the engine crank chamber and is forced into the inlet valve 8.
９＃ｉメクリングダイヤフラム、１０Ｆｉメタリンクレ
バー支軸、１１はメタリングカバー、１２はメタリング
カバーばね、１３はメタリングカバーで外気と連通して
いる。メタリングダイヤフラム９内側のメタリング室１
４Ｖｉ運転中メタリングダイヤ７２ム機能により定負圧
に保持され、作業時の全方位運転を可能とする機構であ
る。9#i Meckling diaphragm, 10Fi Metalink lever support shaft, 11 is a metering cover, 12 is a metering cover spring, and 13 is a metering cover that communicates with the outside air. Metering chamber 1 inside metering diaphragm 9
During 4Vi operation, a constant negative pressure is maintained by the metering dial 72m function, making it possible to operate in all directions during work.
気化器本体３にはペンチエリ一孔１５、絞弁孔１６が前
屈に貫通している。絞弁孔１６に横断直交する絞弁軸１
７ＫＩ％形絞弁］８が取付けられ、運転操作により絞弁
孔１６を開閉する。A pentier hole 15 and a throttle valve hole 16 penetrate forward through the carburetor body 3. Throttle valve shaft 1 transversely orthogonal to throttle valve hole 16
7KI% type throttle valve] 8 is attached, and the throttle valve hole 16 is opened and closed by operation.
線形絞弁１８のアイドリング６８度に対応する絞弁孔１
６に複数個の低速燃料噴口１９が開口し、低速燃料計量
針弁２０により計量された燃料が噴出し、アイドリンク
運転、低開度運転が出来る。Throttle hole 1 corresponding to 68 degrees of idling of linear throttle valve 18
A plurality of low-speed fuel nozzles 19 are opened at 6, and fuel metered by a low-speed fuel metering needle valve 20 is injected, allowing idle-link operation and low-opening operation.
２１１吸引式プライマーボングの作動時、メタリング室
１４へ空気及び燃料の逆流を防止する為めのチェック弁
である。This is a check valve to prevent air and fuel from flowing back into the metering chamber 14 when the 211 suction type primer bong is activated.
ベンチエリ一孔１５には高速燃料噴口２２が開口し、高
速燃料計量針弁２３により計量された燃料が噴出し、高
速運転が出来る。２４はアイＦ′リング時及び吸引式グ
２イ臂−ポンプ作動時に高速ｍｆ＋噴口２２より大気圧
の空気がメタリング室１４へ逆流するのを防止するチェ
ック弁でおる。A high-speed fuel nozzle 22 is opened in the bench area hole 15, and fuel metered by a high-speed fuel metering needle valve 23 is spouted, allowing high-speed operation. Reference numeral 24 designates a check valve that prevents atmospheric pressure air from flowing back into the metering chamber 14 from the high-speed mf+ nozzle 22 during the eye F' ring and when the suction type arm pump is activated.
２５は吸引式プ２イマーボンプ装置で、弾性復原する手
押ゲタン２６、入口及び出口のチェック弁２７及び２８
によシ、メタリング室１４と連通し、手押ボクン２Ｇの
操作により燃料タンク１より上部の燃料管、気化器内の
空気及び燃料ベーノ（−を吸引して気化器内に燃料を導
入充満し、余剰燃料を図中点線で示す様に）（イヌター
タ一式始動装置２９の燃料溜り室３０に供給し、排出口
３１より湿田した燃料は図中点線の如く燃料タンクｌに
還流される為め、燃料溜シ室３０内には排出口３１の開
口高さに相応して定油面が形成される。Reference numeral 25 is a suction type plunger pump device, which includes a hand-push gettan 26 that returns elastically, and check valves 27 and 28 at the inlet and outlet.
Then, it communicates with the metering chamber 14, and by operating the hand pump 2G, the fuel pipe above the fuel tank 1, the air in the carburetor, and the fuel vent (-) are sucked into the carburetor to fill it with fuel. , surplus fuel is supplied to the fuel reservoir chamber 30 of the Inutata starter set 29 (as shown by the dotted line in the figure), and the fuel drained from the discharge port 31 is returned to the fuel tank l as shown by the dotted line in the figure. A constant oil level is formed within the fuel reservoir chamber 30 in accordance with the opening height of the discharge port 31.
３２は燃料溜り室３０の大気通気口でおる。32 is an atmospheric vent of the fuel storage chamber 30.
この燃料溜）塞３０の上部にノ（イヌタータ一式始動装
置２９の本体３３が固着され、燃料溜す室３０内に始動
燃料計量噴口３４を有する吸上管３５が垂下され、定油
面上部及び下部に適当なエヤーブリード孔３６が設置さ
れる。The main body 33 of the starter complete starter 29 is fixed to the upper part of this fuel reservoir block 30, and a suction pipe 35 having a starting fuel metering nozzle 34 is suspended in the fuel reservoir chamber 30, and the upper part of the constant oil level and A suitable air bleed hole 36 is installed at the bottom.
パイスタータ一式始動装［１ｉ２９の本体３３には吸気
口３７が前屈に貫通し、之と直交摺動する始動弁３Ｂに
より開閉される。吸気口３７Ｈダイヤフラム型気化器２
とエンジンとの間、例へげ気化器本体３ＫＦＪｌ＄接す
る断熱筒３９等に図中点線に示す如く連通開口する。An intake port 37 extends forwardly through the main body 33 of the pie starter complete starting device [1i29, and is opened and closed by a starting valve 3B that slides perpendicularly thereto. Inlet port 37H diaphragm type carburetor 2
As shown by the dotted line in the figure, there is a communication opening between the engine and the heat insulating cylinder 39, which is in contact with the carburetor main body 3KFJl, for example.
本発明は以上の如く構成されている為め、エンジンリコ
イル操作前に先づ吸引式プライマーポンプ２５を操作し
、燃料タンクｌ上位の燃料管内及び気化器内の空気及び
燃料ペーパーを吸引し、燃料クンク１より燃料を導入充
満させ、更にバ・ｆスタータ一式始動装置２９のｍ科溜
り室３０に余剰燃料を供給し、排出口３１より燃料タン
ク１に湿田還流する迄吸引式プライマーポンプ２５を操
作する。Since the present invention is configured as described above, the suction type primer pump 25 is first operated before the engine recoil operation, and the air and fuel paper in the fuel pipe and the carburetor above the fuel tank l are sucked, and the fuel is Introduce fuel from pump 1 and fill it up, further supply surplus fuel to m storage chamber 30 of B/F starter set starting device 29, and operate suction type primer pump 25 until it flows back into fuel tank 1 from discharge port 31. do.
次にパイスクータ一式始動装置１！２９の始動弁３８を
引上げて、吸気口３７を開口した后、エンジンの始動リ
コイル操作を行うと、エンジンの吸気圧により線形絞弁
１８のフィトリング開度隙間とパイスクータ一式始動装
置２９の吸気ロ３７０両方より混合気が吸入され、エン
ジンの始動が出来る。Next, after pulling up the starting valve 38 of the pie scooter complete starter 1!29 and opening the intake port 37, when the engine starting recoil operation is performed, the fitting opening gap of the linear throttle valve 18 and The air-fuel mixture is taken in from both intake ports 370 of the pie scooter complete starter 29, and the engine can be started.
パイスタータ一式始動装置２９ｔｉ燃料溜り室３０に垂
下された吸上管３５の始動燃料計量噴口３４及びエヤー
ブリード孔３６の設定により適当な濃混合気とし、始動
后のエンジン回転を刃具クラッチ接合回転以下に抑へ始
動時の安全性を向上させる事が出来ると共に燃料溜り室
３０内の定油面構成は始動混合気として消費され一定時
間で途切れる為め自動的に媛機運転を完了出来る特徴が
おる。By setting the starting fuel metering nozzle 34 and the air bleed hole 36 of the suction pipe 35 suspended in the pie starter complete starting device 29ti fuel reservoir chamber 30, a suitable rich mixture is created, and the engine rotation after starting is kept below the blade clutch engagement rotation. It is possible to improve the safety at the time of starting, and because the constant oil level configuration in the fuel reservoir chamber 30 is consumed as the starting air-fuel mixture and is interrupted after a certain period of time, the engine operation can be completed automatically. .
又パイスタータ一式始動装置２９は燃料タンク１よｐ上
位ならは撮作便利な場所に任意に設置する事が出来、取
扱いも容品である。Further, the pie starter set starting device 29 can be installed at any location convenient for photography as long as it is above the fuel tank 1, and is easy to handle.
ｔｓ１図は本発明実施例要部の縦断面図である。 Figure ts1 is a vertical sectional view of the main part of the embodiment of the present invention.
Claims (1)
吸引式グ２イマーボング装置２５の吐出燃料を、パイス
タータ一式始動装置２９の燃＠榴り室３０に導き、排出
口３１よシ溢出する燃料を燃料タンク１に還流する事を
特徴とするダイヤ７２ム型気化器の始動燃料供給装置。The fuel discharged from the suction-type gas immersion device 25, which communicates with the metering chamber 14 of the 72-diameter carburetor 2, is guided to the combustion chamber 30 of the pie starter complete starter device 29, and the fuel overflowing through the discharge port 31 is guided. This is a starting fuel supply device for a 72-diameter carburetor, characterized in that the fuel is returned to a fuel tank 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6194484A JPS60204951A (en) | 1984-03-29 | 1984-03-29 | Starting fuel feeder of diaphragm type carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6194484A JPS60204951A (en) | 1984-03-29 | 1984-03-29 | Starting fuel feeder of diaphragm type carburetor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60204951A true JPS60204951A (en) | 1985-10-16 |
Family
ID=13185800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6194484A Pending JPS60204951A (en) | 1984-03-29 | 1984-03-29 | Starting fuel feeder of diaphragm type carburetor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60204951A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62243951A (en) * | 1986-04-15 | 1987-10-24 | Walbro Far East Inc | Diaphragm type carburetor for internal combustion engine |
| EP0306856A2 (en) * | 1987-09-07 | 1989-03-15 | Walbro Far East, Inc. | Apparatus for supplying start-fuel in the internal combustion engine for a portable type working machine |
| EP0318865A2 (en) * | 1987-12-01 | 1989-06-07 | Walbro Far East, Inc. | Start-Fuel supply device in internal combustion engine for portable equipment |
| EP0324924A2 (en) * | 1988-01-18 | 1989-07-26 | Walbro Far East, Inc. | Start-Fuel supply device in internal combustion engine for portable equipment |
| JPH0327860U (en) * | 1989-07-25 | 1991-03-20 | ||
| EP0688948A2 (en) | 1994-06-20 | 1995-12-27 | Walbro Japan, Inc. | Apparatus for supplying starting fuel for a carburetor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4726744U (en) * | 1971-02-04 | 1972-11-27 | ||
| JPS5810139A (en) * | 1981-07-13 | 1983-01-20 | Walbro Far East | Auxiliary fuel supplying device for internal- combustion engine |
-
1984
- 1984-03-29 JP JP6194484A patent/JPS60204951A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4726744U (en) * | 1971-02-04 | 1972-11-27 | ||
| JPS5810139A (en) * | 1981-07-13 | 1983-01-20 | Walbro Far East | Auxiliary fuel supplying device for internal- combustion engine |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62243951A (en) * | 1986-04-15 | 1987-10-24 | Walbro Far East Inc | Diaphragm type carburetor for internal combustion engine |
| EP0306856A2 (en) * | 1987-09-07 | 1989-03-15 | Walbro Far East, Inc. | Apparatus for supplying start-fuel in the internal combustion engine for a portable type working machine |
| EP0306856A3 (en) * | 1987-09-07 | 1989-11-23 | Walbro Far East, Inc. | Apparatus for supplying start-fuel in the internal combustion engine for a portable type working machine |
| EP0318865A2 (en) * | 1987-12-01 | 1989-06-07 | Walbro Far East, Inc. | Start-Fuel supply device in internal combustion engine for portable equipment |
| EP0324924A2 (en) * | 1988-01-18 | 1989-07-26 | Walbro Far East, Inc. | Start-Fuel supply device in internal combustion engine for portable equipment |
| JPH0327860U (en) * | 1989-07-25 | 1991-03-20 | ||
| EP0688948A2 (en) | 1994-06-20 | 1995-12-27 | Walbro Japan, Inc. | Apparatus for supplying starting fuel for a carburetor |
| US5554322A (en) * | 1994-06-20 | 1996-09-10 | Walbro Japan, Inc. | Apparatus for supplying starting-fuel for a carburetor |
| EP0688948B1 (en) * | 1994-06-20 | 2001-03-21 | Walbro Japan, Inc. | Apparatus for supplying starting fuel for a carburetor |
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