JPH01294947A - Starting control mechanism for rotary throttle valve type carburetor - Google Patents
Starting control mechanism for rotary throttle valve type carburetorInfo
- Publication number
- JPH01294947A JPH01294947A JP12281688A JP12281688A JPH01294947A JP H01294947 A JPH01294947 A JP H01294947A JP 12281688 A JP12281688 A JP 12281688A JP 12281688 A JP12281688 A JP 12281688A JP H01294947 A JPH01294947 A JP H01294947A
- Authority
- JP
- Japan
- Prior art keywords
- lever
- throttle
- throttle valve
- idle position
- cam
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims description 23
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Means For Warming Up And Starting Carburetors (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は薬剤散布機、刈払機などの携帯作業機に搭載さ
れる内燃機関の気化器、詳しくはロータリスロットル弁
式気化器の始動操作機構に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a starting operation mechanism for an internal combustion engine carburetor installed in a portable working machine such as a chemical sprayer or a brush cutter, and more specifically, a starting operation mechanism for a rotary throttle valve type carburetor. It is related to.
[従来の技術〕
例えば、実公昭63−6438号公報に開示されるロー
タリスロットル弁式気化器では、スロットルレバーの回
動により吸気通路の面積が加減されると同時に、カムR
構によりスロットル弁と一結に針弁が軸方向に移動し、
燃料ノズル孔の開口面積が加減され、機関へ吸引される
空気量に対応して燃料量が加減される。また、寒冷時の
機関の始動には濃い混合気が必要とされるので、スロッ
トルレバーとは独立に作動する始動レバーによりカム間
構を介してスロットル弁が軸方向に移動され、燃料ノズ
ル孔の開口面積が増加される。[Prior Art] For example, in a rotary throttle valve type carburetor disclosed in Japanese Utility Model Publication No. 63-6438, the area of the intake passage is adjusted by rotating the throttle lever, and at the same time the area of the intake passage is adjusted by rotating the throttle lever.
The mechanism moves the needle valve in the axial direction in conjunction with the throttle valve.
The opening area of the fuel nozzle hole is adjusted, and the amount of fuel is adjusted in accordance with the amount of air sucked into the engine. In addition, since a rich air-fuel mixture is required to start the engine in cold weather, the throttle valve is moved in the axial direction via the cam mechanism by the starting lever, which operates independently of the throttle lever, to open the fuel nozzle hole. The opening area is increased.
しかし、上述のロータリスロツトル弁式気化器の始動操
作機構では、寒冷時の(層間の始動に当って、始動レバ
ーとスロットルレバーの両方を操作する必要があり、特
に背負い型薬剤散布機などでは、機体を背負ったままで
の機関の始動が煩頂である。However, with the starting operation mechanism of the rotary throttle valve type vaporizer mentioned above, it is necessary to operate both the starting lever and the throttle lever when starting between layers in cold weather, especially in backpack-type chemical sprayers. , starting the engine with the aircraft on its back is a nuisance.
1体を地上に卸して始動することもできるが、機関の始
動後に機体を背負うことは、機体が非常に不安定になり
、不意に薬剤が噴出するなどの恐れがある。It is also possible to start the aircraft by lowering it to the ground, but carrying the aircraft on your back after the engine has started will make the aircraft extremely unstable and there is a risk that the chemical may spray out unexpectedly.
また、気化器にカバーが施されているような場合に、ス
ロットルレバーと@肋しバーを装着すると、コンパクト
化が妨げられ、機関への81に移動が生じる。Furthermore, when the carburetor is covered, installing a throttle lever and a rib bar will hinder compactness and cause movement to the engine.
[発明が解決しようとする問題点コ
本発明の目的は上述の問題に鑑み、機体を背負ったまま
でも、単一のトリガレバ−の操作で喋関の寒冷始動が可
能なロークリスロットル弁式気化器の始動操作機構を提
供することにある。[Problems to be Solved by the Invention] In view of the above-mentioned problems, the object of the present invention is to provide a low-crisp throttle valve type carburetor that allows cold starting of the engine by operating a single trigger lever even when the aircraft is on the back. The purpose of this invention is to provide a starting operation mechanism for the device.
U問題を解決するための手段]
上記目的を達成するために、本発明の構成はスロットル
弁が回転と同時に軸方向に移動して燃料調整を行うもの
において、操作レバーのアイドル位置からの逆方向への
11回動により、スロットル弁を軸方向へ移動させ始動
時の濃い混合気を得るものである。Means for Solving Problem U] In order to achieve the above object, the present invention has a configuration in which the throttle valve moves in the axial direction at the same time as rotation to adjust the fuel, and the control lever is moved in the opposite direction from the idle position. By turning the throttle valve 11 times, the throttle valve is moved in the axial direction to obtain a rich air-fuel mixture at the time of starting.
[作用]
操作レバー28をアイドル位置から全開方向と反対の方
向へ回動すると、操作レバー28が作動片41をばねの
力に抗して押し倒して作動片41の後側へ移動する。そ
こで、操作レバー28をアイドル位置へ戻すと、操作レ
バー28が作動片41に当り、作動片41と一緒にカム
48が支軸44を中心として回動され、カム48により
スロットルレバー30が押し上げられる。スロットル弁
21と一緒に針弁20が押し上げられ、燃料ノズル孔1
8の開口面積が増大される。これにより、遠隔的に操作
レバー28だけを操作するだけで、寒冷始動時の燃料分
が増大される。[Function] When the operating lever 28 is rotated from the idle position in the opposite direction to the fully open direction, the operating lever 28 pushes down the operating piece 41 against the force of the spring and moves to the rear side of the operating piece 41. Therefore, when the operating lever 28 is returned to the idle position, the operating lever 28 hits the operating piece 41, the cam 48 is rotated together with the operating piece 41 around the support shaft 44, and the cam 48 pushes up the throttle lever 30. . The needle valve 20 is pushed up together with the throttle valve 21, and the fuel nozzle hole 1
8 opening area is increased. As a result, the amount of fuel at the time of cold starting can be increased by simply operating the control lever 28 remotely.
[発明の実施例1
第1図に示すように、ブロック状の本体2に円筒形の吸
気通路1が貫通され、この人口端部1aはエアクリーナ
に、出口端部1bi、t[関の吸気ボートにそれぞれ接
続される。本体2に吸気通路1を横切るように上端が開
口する円筒部24が形成され、この内部に円柱形のスロ
ットル弁21が回動可能に支持される。スロットル弁2
1の上端部に形成した弁軸25は、本体2の円筒部24
を開鎖する軸受部材3の軸穴22に支持される。スロッ
トル孔21の下端部に設けた円筒部17が、本体2の円
筒部24の底部12に形成した軸部16に嵌合される。Embodiment 1 of the Invention As shown in FIG. 1, a cylindrical intake passage 1 is penetrated through a block-shaped main body 2, and this artificial end 1a is connected to an air cleaner through outlet ends 1bi, t [intake boat of the are connected to each. A cylindrical portion 24 whose upper end is open so as to cross the intake passage 1 is formed in the main body 2, and a cylindrical throttle valve 21 is rotatably supported inside the cylindrical portion 24. Throttle valve 2
The valve shaft 25 formed at the upper end of the main body 2 is connected to the cylindrical portion 24 of the main body 2.
is supported in the shaft hole 22 of the bearing member 3 which is opened. A cylindrical portion 17 provided at the lower end of the throttle hole 21 is fitted into a shaft portion 16 formed at the bottom 12 of the cylindrical portion 24 of the main body 2 .
軸受部材3とスロットル弁21の間に介装されたばね9
は、−喘をスロットル弁21に、他端を軸受部材3にそ
れぞれ係止される。ばね9によりスロットル弁21がア
イドル位置へ回転付勢され、また弁軸25の上端に結合
したスロットルレバー30の下面のカム溝34が、軸受
部材3から突出する往36のボール38に当接される。A spring 9 interposed between the bearing member 3 and the throttle valve 21
The - end is locked to the throttle valve 21 and the other end is locked to the bearing member 3, respectively. The spring 9 rotationally biases the throttle valve 21 to the idle position, and the cam groove 34 on the lower surface of the throttle lever 30 connected to the upper end of the valve shaft 25 comes into contact with the ball 38 of the recess 36 protruding from the bearing member 3. Ru.
スロットル弁21に吸気通路1と連通可能のスロットル
孔19が設けられ、このスロットル孔1つへ本体2の軸
部16からノズル管15が突出されるっノズル管15は
軸部16の円筒部13へ嵌合支持され、燃料通路14の
下端部は図示してない例えばダイヤフラム型燃料供給F
11111のメー々リング室と連通される。ノズル管1
5に設けた吸気通路1の下流側I\開口するノズル孔1
8は、燃料通路14へ上側から嵌合する針弁20により
開口面積を調整される。針弁20の上端部は調整ボルト
23に結合され、この調整ポル1〜23を弁軸25の穴
6へばね10の力に抗して螺合することにより、針弁2
0のスロットル孔19への突出位置が調整される。The throttle valve 21 is provided with a throttle hole 19 that can communicate with the intake passage 1, and a nozzle pipe 15 projects from the shaft portion 16 of the main body 2 into one throttle hole. For example, a diaphragm type fuel supply F (not shown) is fitted and supported at the lower end of the fuel passage 14.
It communicates with the mailing room at 11111. Nozzle pipe 1
Nozzle hole 1 opened on the downstream side I\ of the intake passage 1 provided in 5
8 has its opening area adjusted by a needle valve 20 that fits into the fuel passage 14 from above. The upper end of the needle valve 20 is connected to an adjustment bolt 23, and by screwing the adjustment bolts 1 to 23 into the hole 6 of the valve shaft 25 against the force of the spring 10, the needle valve 20 is fixed.
0 into the throttle hole 19 is adjusted.
スロットルレバー30のカム溝34は弁軸25を中心と
する円弧状のもの(第2図参照)であり、カム溝34の
深さはアイドル位置で最も深く、全開位置へ至るしたが
い次第に浅くなる。したがって、スロットルレバー30
をアイドル位置から全開位置へ回vJすると、吸気通路
1に対するスロットル孔19の開度が次第に増加し、同
時にスロツトル弁21と一緒に針弁20がばね9の力に
抗して押し上げられ、ノズル孔18の間口面積が増加し
、燃料通路14からスロットル孔19へ吸引される燃料
量が増加する。このようなロータリスロットル弁式気化
器の構成は従来のものと同様である。The cam groove 34 of the throttle lever 30 has an arc shape centered on the valve shaft 25 (see FIG. 2), and the depth of the cam groove 34 is deepest at the idle position and gradually becomes shallower as it reaches the fully open position. Therefore, the throttle lever 30
When VJ is turned from the idle position to the fully open position, the opening degree of the throttle hole 19 with respect to the intake passage 1 gradually increases, and at the same time, the needle valve 20 is pushed up together with the throttle valve 21 against the force of the spring 9, and the nozzle hole The frontage area of fuel passage 18 increases, and the amount of fuel sucked from fuel passage 14 to throttle hole 19 increases. The structure of such a rotary throttle valve type carburetor is the same as that of a conventional one.
本発明によれば、軸受部材3の上に金属板などからなる
ブラケッ1−26が重ね合され、軸受部材3と一緒に複
数のボルト8(第2図参照)により本体2へ結合される
。ブラケット26に弁軸25と平行な支軸27が固定さ
れ、これに操作レバー28の基端部に形成したボス部2
8aが回動可能に嵌合され、かつ外れないように支軸2
7の上端部に座板がボルト29により結合される。操作
レバー28はスロットルレバー30の上側に重なるよう
に延びる。操作レバー28の先端部の軸穴に、スイベル
31の下端側小径軸部が回動可能に挿通され、かつ抜け
ないように止め輪を係止される。According to the present invention, a bracket 1-26 made of a metal plate or the like is superimposed on the bearing member 3, and is coupled to the main body 2 together with the bearing member 3 by a plurality of bolts 8 (see FIG. 2). A support shaft 27 parallel to the valve shaft 25 is fixed to the bracket 26, and a boss portion 2 formed at the base end of the operating lever 28 is attached to this support shaft 27.
8a is rotatably fitted and not detached from the support shaft 2.
A seat plate is coupled to the upper end portion of 7 with bolts 29 . The operating lever 28 extends so as to overlap above the throttle lever 30. The lower end small-diameter shaft portion of the swivel 31 is rotatably inserted into the shaft hole at the tip of the operating lever 28, and a retaining ring is locked to prevent it from coming off.
スイベル31の上端部の割溝31aにインチケーブル5
の端部が公知の手段により結合される(第2図)。スロ
ットルレバー3oの端部に形成した軸穴に、鋼板を円筒
形に巻いてなる作動ビン32が嵌合固定される。An inch cable 5 is inserted into the groove 31a at the upper end of the swivel 31.
The ends of the two are joined by known means (FIG. 2). An operating pin 32 made of a cylindrical steel plate is fitted and fixed into a shaft hole formed at the end of the throttle lever 3o.
軸受部材3と一体に形成したブラケット43にカム48
が支軸44により回動可能に支持される。A cam 48 is attached to a bracket 43 formed integrally with the bearing member 3.
is rotatably supported by a support shaft 44.
カム48は断面はぼ楕円形をなすもので、通常はばね4
5の力により軸受部材3の板面に横置された状態とされ
る。この時、スロットルレバー30の下面か、前述した
ばね9の力によりカム48の上面に接近した状態にある
。カム48の右端部に一体に形成した柱49の割溝に、
作動片41がビン42により所定笥囲内で回動可能に支
持される。The cam 48 has a roughly elliptical cross section, and is normally connected to the spring 4.
5, the bearing member 3 is placed horizontally on the plate surface of the bearing member 3. At this time, the lower surface of the throttle lever 30 approaches the upper surface of the cam 48 due to the force of the spring 9 described above. In the groove of the column 49 integrally formed on the right end of the cam 48,
The actuating piece 41 is rotatably supported by a pin 42 within a predetermined enclosure.
ばね45はカム48に形成した切欠47(第4図)にお
いて支軸44に巻き付けられ、一端が軸受部材3に係止
され、他端が作動片41の背面に係止される。したがっ
て、作動片41はばね45により直立した状態に付勢さ
れ、操作レバー28の側縁に当接可能とされる。The spring 45 is wound around the support shaft 44 at a notch 47 (FIG. 4) formed in the cam 48, and one end is locked to the bearing member 3, and the other end is locked to the back surface of the actuating piece 41. Therefore, the actuating piece 41 is biased by the spring 45 into an upright state and can come into contact with the side edge of the operating lever 28 .
第4図に示すように、カム48は断面はぼ楕円形のカム
48の一端側に形成した柱49の上端部に、作動片41
を支持する割溝4Gが形成され、このIJ溝46の両側
壁に、削溝46を横切るビン42を嵌合するビン穴42
aが設けられる。またカム48のばね45を収容する切
欠47の両側壁に、切欠47を横切る支軸44を嵌合す
6軸穴44aが設けられる。As shown in FIG. 4, the cam 48 has an actuating piece 41 attached to the upper end of a column 49 formed at one end of the cam 48, which has an approximately elliptical cross section.
A split groove 4G supporting the IJ groove 46 is formed on both side walls of the IJ groove 46, and a bottle hole 42 into which the bottle 42 that crosses the cut groove 46 is fitted is formed.
a is provided. Furthermore, six-shaft holes 44a are provided on both side walls of the notch 47 that accommodates the spring 45 of the cam 48, into which the support shaft 44 that crosses the notch 47 is fitted.
第2図に示すように、作動ビン32は操作レバー28の
端部側縁に当接される。ブラケット26の縁部を折り曲
げでなる取イ]壁26bのねし穴に案内管7(アウタチ
ューブ3つの一端を結合づるもの)が螺合され、かつロ
ックナツト11により固定される。操作レバー28に連
結されたインチケーブル5は案内管7を経てアウタチュ
ーブ39にj、TI通される。アウタチューブ39の他
端は作業機のハンドル部ないし操作部に固定される一方
、インナケーブル5の他端は操作部に軸支持したトリ刀
レバーに連結される。As shown in FIG. 2, the operating pin 32 is brought into contact with the end side edge of the operating lever 28. As shown in FIG. The guide tube 7 (which connects one end of the three outer tubes) is screwed into a tapped hole in the wall 26b and fixed by a lock nut 11. The inch cable 5 connected to the operating lever 28 is passed through the outer tube 39 through the guide tube 7. The other end of the outer tube 39 is fixed to a handle portion or an operating section of the work machine, while the other end of the inner cable 5 is connected to a triangular lever that is pivotally supported on the operating section.
第3図に示すように、ブラケツ1〜26はボルト8を挿
通する穴8a、支@27を嵌合する軸穴27a、柱36
などを目通させる穴36aが設けられるとともに、縁部
を垂直に折り曲げてなる取付壁26a、26b、26c
が形成される。取付壁26aにスロットル調整ボルト4
が螺合され、この端部4aにスロットルレバー30の端
部が前述したばね9の力により当接される。この時、ス
ロットルレバー30は第2図に示す状態にあり、作動ビ
ン32により操作レバー28も図示の状態に戻されるが
、操作レバー28はインナケーブル5の遠隔的操作によ
り!Jt4線で示す取付壁26cに当る位置まで回動可
能とされる。As shown in FIG. 3, the brackets 1 to 26 include a hole 8a through which the bolt 8 is inserted, a shaft hole 27a into which the support @27 is fitted, and a pillar 36.
Mounting walls 26a, 26b, 26c are provided with holes 36a for passing through, and the edges are vertically bent.
is formed. Throttle adjustment bolt 4 on mounting wall 26a
are screwed together, and the end of the throttle lever 30 is brought into contact with this end 4a by the force of the spring 9 described above. At this time, the throttle lever 30 is in the state shown in FIG. 2, and the operating lever 28 is also returned to the state shown in the drawing by the actuating pin 32, but the operating lever 28 is moved by remote control of the inner cable 5! It can be rotated to a position where it hits the mounting wall 26c indicated by the Jt4 line.
次に、本発明によるロータリスロットル弁式気化器の始
動操作機講の作動について説明吏る。第2図に示すスロ
ットル弁21のアイドル位置では、スロットルレバー3
0は第1図に示すばね9の力により反時計方向に回転付
勢され、スロットル調整ボルト4の端部4aに衝合され
る。同時に、作動ビン32が操作レバー28の側縁に当
接される。Next, the operation of the starting operation mechanism of the rotary throttle valve type carburetor according to the present invention will be explained. In the idle position of the throttle valve 21 shown in FIG.
0 is urged to rotate counterclockwise by the force of a spring 9 shown in FIG. At the same time, the operating pin 32 is brought into contact with the side edge of the operating lever 28.
この時、作動片41は第5図に示すように、ばね45の
力により割溝46の停止壁46aに当り、直立状態とさ
れる。At this time, as shown in FIG. 5, the actuating piece 41 hits the stop wall 46a of the split groove 46 by the force of the spring 45, and is brought into an upright state.
機関の寒冷始動時、図示してないトリガレバ−によりイ
ンナケーブル5を第2図において上方へ押し戻すと、操
作レバー28だけが支軸27を中心として反時計方向へ
回動して、取付g26cに当る。この間に、操作レバー
28は第6図に示すように、作動片41をばね45の力
に抗して後方へ押し倒して鎖線で示す位置に至る。操作
レバー28が作動片41を通過すると、作動片41は鎖
線で示すように直立状態に復帰する。When the engine is cold started, when the inner cable 5 is pushed back upward in FIG. 2 using a trigger lever (not shown), only the operating lever 28 rotates counterclockwise about the support shaft 27 and hits the mounting g26c. . During this time, as shown in FIG. 6, the operating lever 28 pushes the operating piece 41 backward against the force of the spring 45 to reach the position shown by the chain line. When the operating lever 28 passes the actuating piece 41, the actuating piece 41 returns to the upright state as shown by the chain line.
次いで、トリがレバーによりインナケーブル5を第2図
において下方へ引くと、操作レバー28が支軸27を中
心として時計方向に回動され、操作レバー28の側縁が
作動ビン32に当り、スロットルレバー30が所要の位
置に回動され、スロットル弁21が所要の開度とされる
。この間に、操作レバー28は第6図にwA線で示すよ
うに直立状態にある作動片41に当り、アイドル位置を
通過すると同時に、第7図に示すように作動片41と一
体的にカム48が支軸44を中心として傾動する。Next, when the bird pulls the inner cable 5 downward with the lever in FIG. The lever 30 is rotated to a required position, and the throttle valve 21 is opened to a required degree. During this time, the operating lever 28 hits the operating piece 41 in the upright state as shown by the line wA in FIG. 6, passes through the idle position, and at the same time, as shown in FIG. is tilted about the support shaft 44.
第2図において、カム48によりスロットルレバー3o
がカム溝34とボール38の当接位置よりもざらに押し
上げられ、針弁20も一緒に押し上げられる。これによ
り、スロットル弁21の開度に対して通常の状態よりも
ノズル孔18の開口面積が増大され、機関の始動に必要
な濃い混合気が機関へ供給されることとなり、機関の寒
冷始動が容易に達せられる。In FIG. 2, the throttle lever 3o is controlled by the cam 48.
is roughly pushed up beyond the contact position between the cam groove 34 and the ball 38, and the needle valve 20 is also pushed up together. As a result, the opening area of the nozzle hole 18 is increased compared to the normal state with respect to the opening degree of the throttle valve 21, and the rich air-fuel mixture necessary for starting the engine is supplied to the engine, thereby preventing cold starting of the engine. easily reached.
機関の始動後、トリガレバ−によりインナケーブル5を
さらに引き、操作レバー28を第2図において支軸27
を中心として時計方向へ回動すると、第7図に鎖線で示
すように、操作レバー28が作動片41とカム48を押
し倒して通過し、通過後はばね45の力によりカム48
が第5図に示す位置へ戻される。After starting the engine, pull the inner cable 5 further using the trigger lever and move the operating lever 28 to the support shaft 27 in FIG.
When rotated clockwise around , the operating lever 28 pushes down the operating piece 41 and the cam 48 and passes, as shown by the chain line in FIG.
is returned to the position shown in FIG.
[発明の効果]
本発明は上述のように、スロットル弁が回転と同時に軸
方向に移動して燃料調整を行うものにおいて、操作レバ
ーのアイドル位置からの逆方向への往復回動により、ス
ロットル弁を軸方向へ移動させ始動時の濃い混合気を得
るしのであるから、例えば背負い型作業礪のように、機
体を直接視認できない場合でも、単一のトリガレバ−の
押し引き操作だけで、冷寒始動時の燃料量を増加して濃
い混合気を得ることができ、冷g始動操作が非富に簡単
で始動後の暖機も容易である。[Effects of the Invention] As described above, the present invention adjusts the fuel by moving the throttle valve in the axial direction at the same time as it rotates, and by reciprocating the control lever in the opposite direction from the idle position, the throttle valve axially to obtain a rich air-fuel mixture at startup, even when you cannot see the aircraft directly, such as when you are working on a backpack, you can easily control cold and cold conditions by simply pushing and pulling a single trigger lever. A rich mixture can be obtained by increasing the amount of fuel at the time of starting, the cold-g starting operation is extremely simple, and warming up after starting is also easy.
始動時の燃料増加を必要としない場合は、通常のアイド
ル位置から全開方向ヘトリがレバーを操作すればよいか
ら、誤操作が回避される。If an increase in fuel is not required at the time of starting, the lever can be operated from the normal idle position to the fully open direction, thereby avoiding erroneous operation.
機関の加速操作と始動操作が、単一のケーブルと操作レ
バーで達せられるから、気化器の構成がコンパクトにな
り、ケーブルの掛は回しも簡潔である。Since engine acceleration and starting operations are achieved with a single cable and operating lever, the carburetor configuration is compact and the cable hooks and turns are simple.
第1図は本発明に係る始動操作機構を備えたロータリス
ロットル弁式気化器の正面断面図、第2図は同平面図、
第3図はブラケットの平面図、第4図はカムの斜視図、
第5〜7図は始動操作機構の作動を説明する側面図であ
る。
2:本体 5:インナケーブル 21:スロットル弁
25;弁軸 28:操作レバー 30:スロットルレバ
ー 32:作動ビン 41:作動片48:カムFIG. 1 is a front sectional view of a rotary throttle valve type carburetor equipped with a starting operation mechanism according to the present invention, FIG. 2 is a plan view thereof,
Figure 3 is a plan view of the bracket, Figure 4 is a perspective view of the cam,
5 to 7 are side views illustrating the operation of the starting operation mechanism. 2: Main body 5: Inner cable 21: Throttle valve
25; Valve stem 28: Operating lever 30: Throttle lever 32: Operating bin 41: Operating piece 48: Cam
Claims (2)
料調整を行うものにおいて、操作レバーのアイドル位置
からの逆方向への往復回動により、スロツトル弁を軸方
向へ移動させ始動時の濃い混合気を得ることを特徴とす
るロータリスロットル弁式気化器の始動操作機構。(1) In devices where the throttle valve moves axially at the same time as it rotates to adjust the fuel, the throttle valve is moved axially by reciprocating rotation of the operating lever in the opposite direction from the idle position, resulting in a rich fuel flow during startup. A starting operation mechanism for a rotary throttle valve type carburetor, which is characterized by obtaining an air-fuel mixture.
る楕円カムを本体に回動可能に軸支持し、スロットルレ
バーの上側に配設されていてスロットルレバーを全開方
向へ押動する操作レバーのアイドル位置から全開方向と
反対の方向への回動により、ばねに抗して傾けられる作
動片をカムに軸支持し、操作レバーのアイドル位置より
も後退位置からアイドル位置への回動により、作動片と
カムが一体に回動され、スロットルレバーと針弁が軸方
向に移動し、燃料ノズル孔が拡大されることを特徴とす
るロータリスロットル弁式気化器の始動操作機構。(2) An elliptical cam that comes into contact with the lower surface of the throttle lever connected to the valve shaft is rotatably supported by the main body, and an operating lever that is disposed above the throttle lever and pushes the throttle lever in the fully open direction. The actuating piece, which is tilted against the spring by rotating from the idle position in the opposite direction to the fully open direction, is supported by the cam, and is activated by rotating the operating lever from the retracted position than the idle position to the idle position. A starting operation mechanism for a rotary throttle valve type carburetor, characterized in that the blade and the cam are rotated together, the throttle lever and needle valve are moved in the axial direction, and the fuel nozzle hole is enlarged.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63122816A JPH0819877B2 (en) | 1988-05-19 | 1988-05-19 | Rotary throttle valve carburetor starting operation mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63122816A JPH0819877B2 (en) | 1988-05-19 | 1988-05-19 | Rotary throttle valve carburetor starting operation mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01294947A true JPH01294947A (en) | 1989-11-28 |
JPH0819877B2 JPH0819877B2 (en) | 1996-02-28 |
Family
ID=14845347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63122816A Expired - Fee Related JPH0819877B2 (en) | 1988-05-19 | 1988-05-19 | Rotary throttle valve carburetor starting operation mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0819877B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0667841U (en) * | 1993-03-01 | 1994-09-22 | タナカ工業株式会社 | Starting operation mechanism in rotary throttle valve carburetor |
US6769670B2 (en) * | 2001-12-07 | 2004-08-03 | Walbro Japan, Inc. | Starting assembly for a carburetor |
US7261280B2 (en) * | 2005-02-02 | 2007-08-28 | Walbro Engine Management, L.L.C. | Engine start device of a rotary valve carburetor |
US7475871B2 (en) * | 2005-06-03 | 2009-01-13 | Walbro Engine Management, L.L.C. | Start assist device for a rotary carburetor |
US20110204576A1 (en) * | 2010-02-25 | 2011-08-25 | Tamotsu Saito | Dust seal structure for valve stem in rotary throttle valve carburetor |
JP2018091235A (en) * | 2016-12-02 | 2018-06-14 | 株式会社やまびこ | Portable engine work machine and rotary type carburetor incorporated into the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS555743U (en) * | 1978-06-29 | 1980-01-16 | ||
JPS6289776A (en) * | 1985-10-16 | 1987-04-24 | Canon Inc | Recording liquid |
JPH04337370A (en) * | 1991-01-28 | 1992-11-25 | Xerox Corp | Ink composition |
-
1988
- 1988-05-19 JP JP63122816A patent/JPH0819877B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS555743U (en) * | 1978-06-29 | 1980-01-16 | ||
JPS6289776A (en) * | 1985-10-16 | 1987-04-24 | Canon Inc | Recording liquid |
JPH04337370A (en) * | 1991-01-28 | 1992-11-25 | Xerox Corp | Ink composition |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0667841U (en) * | 1993-03-01 | 1994-09-22 | タナカ工業株式会社 | Starting operation mechanism in rotary throttle valve carburetor |
US6769670B2 (en) * | 2001-12-07 | 2004-08-03 | Walbro Japan, Inc. | Starting assembly for a carburetor |
US6945520B2 (en) * | 2001-12-07 | 2005-09-20 | Walbro Japan, Inc. | Starting assembly for a carburetor |
US7261280B2 (en) * | 2005-02-02 | 2007-08-28 | Walbro Engine Management, L.L.C. | Engine start device of a rotary valve carburetor |
US7475871B2 (en) * | 2005-06-03 | 2009-01-13 | Walbro Engine Management, L.L.C. | Start assist device for a rotary carburetor |
US20110204576A1 (en) * | 2010-02-25 | 2011-08-25 | Tamotsu Saito | Dust seal structure for valve stem in rotary throttle valve carburetor |
US8608136B2 (en) * | 2010-02-25 | 2013-12-17 | Zama Japan Kabushiki Kaisha | Dust seal structure for valve stem in rotary throttle valve carburetor |
JP2018091235A (en) * | 2016-12-02 | 2018-06-14 | 株式会社やまびこ | Portable engine work machine and rotary type carburetor incorporated into the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0819877B2 (en) | 1996-02-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7201144B2 (en) | Operating apparatus of engine in portable working machine | |
JPH01294947A (en) | Starting control mechanism for rotary throttle valve type carburetor | |
JP2018091235A5 (en) | ||
JP2018091235A (en) | Portable engine work machine and rotary type carburetor incorporated into the same | |
JP2008267384A (en) | Fuel air mixing device with idle and open throttle choke control | |
US3726511A (en) | Accessory for carburetor choke adjustment | |
JPH0649879Y2 (en) | Vaporizer Farst Idle Device | |
JPH0648140Y2 (en) | Vaporizer starting fuel supply device | |
JPS6211326Y2 (en) | ||
JPS63289247A (en) | Operating device for carburetor | |
JPH0433970Y2 (en) | ||
JPH0649880Y2 (en) | Sliding throttle valve type carburetor | |
JP2002339804A (en) | Bystarter of carburetor | |
JPH0720363Y2 (en) | Vaporizer | |
JP2566812B2 (en) | Sliding throttle valve carburetor | |
JP3793716B2 (en) | Rotary throttle carburetor starter | |
JPH0752365Y2 (en) | General-purpose engine stop device | |
US6840509B2 (en) | Carburetor for an internal combustion engine | |
JP2539082Y2 (en) | Starting operation mechanism for rotary throttle valve carburetor | |
JPH0443375Y2 (en) | ||
JPS6026204Y2 (en) | Engine rotation adjustment device | |
JPS6127668Y2 (en) | ||
JP2597951Y2 (en) | Rotary throttle valve carburetor | |
JPH0439400Y2 (en) | ||
JPH0634587Y2 (en) | Lever device for carburetor operation of general-purpose engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: R3D02 |
|
LAPS | Cancellation because of no payment of annual fees |