JP2583432B2 - Starter for vaporizer - Google Patents
Starter for vaporizerInfo
- Publication number
- JP2583432B2 JP2583432B2 JP62321073A JP32107387A JP2583432B2 JP 2583432 B2 JP2583432 B2 JP 2583432B2 JP 62321073 A JP62321073 A JP 62321073A JP 32107387 A JP32107387 A JP 32107387A JP 2583432 B2 JP2583432 B2 JP 2583432B2
- Authority
- JP
- Japan
- Prior art keywords
- starting fuel
- starting
- chamber
- partition
- operating rod
- 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 - Fee Related
Links
Landscapes
- Means For Warming Up And Starting Carburetors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は機関へ供給される混合気の濃度及び量を制御
する気化器に関するもので、特に機関の始動時に濃混合
気を供給する気化器の始動装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carburetor for controlling the concentration and amount of an air-fuel mixture supplied to an engine, and more particularly to a carburetor for supplying a rich air-fuel mixture when the engine is started. The starting device.
従来、一般的に使用される２サイクル機関用気化器の
始動装置は、気化器の吸気道内にチョーク弁を配置して
機関の始動時にチョーク弁にて吸気道を全閉状態に保持
するいわるチョーク型のものと、吸気道内に配置した絞
り弁の前後を始動通路で連結するとともに該始動通路に
スターター開閉弁を配置し、機関の始動時にスターター
開閉弁にて始動通路を開放状態に保持するいわゆるスタ
ーター型のものとがある。Conventionally, a starting device for a carburetor for a two-cycle engine, which is generally used, has a choke valve disposed in an intake passage of the carburetor, and the intake passage is fully closed by the choke valve when the engine is started. A start passage connects the front and rear of a choke type and a throttle valve arranged in the intake passage with a start passage, and a starter opening / closing valve is arranged in the start passage, and when the engine is started, the start passage is kept open by the starter opening / closing valve. There is a so-called starter type.
かかる従来の始動装置は次の問題点を有する。 Such a conventional starting device has the following problems.
すなわち、前者によると、始動時において、チョーク
弁を閉じ機関のクランキング動作すると、このクランキ
ングによって生起する吸気道負圧がチョーク弁のチョー
ク効果によって高められ、もって吸気道内に開口する低
速噴孔、主ノズル等の噴孔に高められた吸気道負圧が作
用して該噴孔より燃料を吸出して始動用燃料を機関へ供
給するようにしたものであるが、これら低速噴孔に至る
低速燃料系あるいは主ノズルに至る主燃料系は、それぞ
れ機関の低速運転状態あるいは、中，高速運転状態に適
合するようセッティングされるもので、始動時を満足さ
せるようこれら低速燃料系、主燃料系を調整するために
は、その適合の為のセッティング作業に多くの時間が費
やされる。That is, according to the former, when the engine is cranked by closing the choke valve at the time of starting, the intake passage negative pressure generated by this cranking is increased by the choke effect of the choke valve, and the low-speed injection hole opened into the intake passage. In this configuration, the negative pressure of the intake passage acts on the injection holes of the main nozzle and the like to suck the fuel from the injection holes and supply the starting fuel to the engine. The fuel system or the main fuel system leading to the main nozzle is set so as to conform to the low-speed operation state of the engine, or the medium and high-speed operation states, respectively. In order to make adjustments, a lot of time is spent on setting work for the adjustment.
即ち、一度設定した低速燃料系あるいは主燃料系を始
動性能を改善する為の変更した際には再度、低速燃料
系、主燃料系のテストを実施して確認をする必要がある
からである。That is, when the low-speed fuel system or the main fuel system that has been set is changed to improve the starting performance, it is necessary to conduct a test of the low-speed fuel system and the main fuel system again to confirm them.
また後者によると、低速燃料系と主燃料系とは全く別
系統として始動通路を有することから前者のごとく低速
燃料系及び主燃料系との関連はなくセッティング作業は
容易となるものであるが機関の始動時に絞り弁を開放操
作した際には吸気道内に高い吸気道負圧を得にくいこと
から始動燃料の吸出が不能となり始動性が悪化する恐れ
がある。According to the latter, since the low-speed fuel system and the main fuel system have a start passage as a completely separate system, there is no connection between the low-speed fuel system and the main fuel system as in the former, and the setting work is easy, but the engine When the throttle valve is opened at the time of starting, it is difficult to obtain a high intake passage negative pressure in the intake passage, so that the starting fuel cannot be sucked out and the startability may be deteriorated.
本発明になる気化器の始動装置は前記不具合点に鑑
み、始動性向上の為のセッテイング作業が容易で且つ機
関の初爆，完爆及び暖機運転に最適な始動燃料を供給し
得る始動性の良好な前記装置を提供することにあるとと
もに区画体の耐久性が秀れ長期に渡って安定した性能を
保持することにあり、前記目的達成の為に、内部を吸気
道２が貫通した気化器本体１の側部に浮子室本体３を配
置し、気化器本体１と、浮子室本体３とによって内部に
一定液面を貯溜せる浮子室４を形成した気化器におい
て； 内部を区画体20にて始動燃料ポンプ室21と大気室22と
に区分し、始動燃料ポンプ室21には、内部に吸入側逆止
弁25を配置し、浮子室４の一定液面下に連絡される始動
燃料流入路24と、内部に吐出側逆止弁31を配置せる始動
燃料吐出路28とを開口し、さらにスプリング37にて始動
燃料ポンプ室21側に押圧される区画体20には、前記始動
燃料吐出路を開閉制御し得る開閉弁部33と、区画体20に
ポンプ動作力を付与し得る操作杆34とを一体的に設ける
とともに、前記操作杆には、区画体20の開閉弁部33にて
始動燃料吐出路28を閉塞した第１状態と、区画体20を大
気室22側へ引いた第２状態との略中間位置に保持し得る
中間位置規制部材Ｎを設け、第２状態より操作杆34に対
する引力を解除した際、スプリング37のバネ力によって
区画体20を略中間位置迄自動復帰させ、始動燃料ポンプ
室21内の燃料を始動燃料吐出路28を介して吐出してなる
気化器の始動装置である。In view of the above-mentioned problems, the starting device for a carburetor according to the present invention is capable of easily performing setting work for improving startability and supplying optimum starting fuel for initial explosion, complete explosion and warm-up operation of the engine. In order to achieve the above object, the intake passage 2 penetrates the inside to achieve the above object, and to maintain the stable performance over a long period of time. In a vaporizer in which a float chamber main body 3 is arranged on a side portion of the vessel main body 1 and a float chamber 4 for storing a constant liquid level is formed by the vaporizer main body 1 and the float chamber main body 3; The starting fuel pump chamber 21 is divided into a starting fuel pump chamber 21 and an atmosphere chamber 22. The starting fuel pump chamber 21 is provided with a suction-side check valve 25 therein, and the starting fuel is communicated below a certain liquid level in the float chamber 4. Opening the inflow passage 24 and the starting fuel discharge passage 28 in which the discharge-side check valve 31 is disposed, Further, the partitioning body 20 pressed toward the starting fuel pump chamber 21 by the spring 37 has an opening / closing valve portion 33 that can control opening and closing of the starting fuel discharge passage, and an operation that can apply a pump operating force to the partitioning body 20. A first state in which the starting fuel discharge passage 28 is closed by the open / close valve portion 33 of the partition 20 and the partition 20 are pulled toward the atmosphere chamber 22 while the operating rod is provided integrally with the operating rod. An intermediate position regulating member N which can be held at a substantially intermediate position with respect to the second state is provided, and when the attraction to the operating rod 34 is released from the second state, the partition 20 is automatically returned to the substantially intermediate position by the spring force of the spring 37. This is a carburetor starting device that discharges fuel in the starting fuel pump chamber 21 through a starting fuel discharge passage 28.
機関の始動時には、操作杆を大気室側に引いて始動燃
料ポンプ室と室容積を増して始動燃料ポンプ室内に浮子
室内の燃料を吸引する。When the engine is started, the operation rod is pulled toward the atmosphere chamber to increase the capacity of the starting fuel pump chamber and the chamber, and the fuel in the floating chamber is sucked into the starting fuel pump chamber.
次いで操作杆に対する引力を解除して操作杆を自由状
態とする。すると操作杆はスプリングのバネ力によって
始動燃料ポンプ室側へ自動的に移動するもので、操作杆
の始動燃料ポンプ室側への移動は中間位置規制部材によ
って決定される。Next, the attraction to the operating rod is released to bring the operating rod into a free state. Then, the operating rod automatically moves toward the starting fuel pump chamber by the spring force of the spring, and the movement of the operating rod toward the starting fuel pump chamber is determined by the intermediate position regulating member.
これによると始動燃料ポンプ室内の燃料は始動燃料吐
出路より吸気道内へ噴出供給されて機関の初爆，完爆に
備えることができるものである。かかる状態にて機関の
始動操作を行ない機関が完爆して暖機運転に入ると、吸
気管に発生する負圧が吐出側逆止弁を開放して始動燃料
吐出路より吸気管内に暖機用の燃料を供給して機関の暖
機運転を満足する。According to this, the fuel in the starting fuel pump chamber is ejected and supplied from the starting fuel discharge passage into the intake passage to be ready for the first explosion and the complete explosion of the engine. When the engine is started in this state and the engine completes explosion and enters a warm-up operation, the negative pressure generated in the intake pipe opens the discharge-side check valve and warms up the start-up fuel discharge passage into the intake pipe. Supply fuel for the engine to satisfy the warm-up operation of the engine.
次いで暖機運転が終了すると、操作杆に押圧力を加え
操作杆を始動燃料ポンプ室側へ更に戻すものであり、こ
れによると開閉弁部が始動燃料吐出路を閉塞するので、
かかる始動燃料吐出路より機関への始動用燃料の供給が
停止されるものである。Next, when the warming-up operation is completed, a pressing force is applied to the operating rod to return the operating rod further to the starting fuel pump chamber side. According to this, since the opening / closing valve unit closes the starting fuel discharge path,
The supply of the starting fuel to the engine from the starting fuel discharge path is stopped.
そして、機関の運転時に、仮に吐出側逆止弁が開放し
ても開閉弁部が弁座に吸引されて、弁座の内方に開孔す
る始動燃料吐出路を閉塞するので区画体に対して吸気道
内の負圧が作用して区画体を変形させることがない。During operation of the engine, even if the discharge-side check valve is opened, the on-off valve portion is sucked into the valve seat and closes the starting fuel discharge passage that opens inside the valve seat. Therefore, the negative pressure in the intake passage does not act to deform the partition.
以下、本発明の一実施例につき第１図によって説明す
る。Hereinafter, an embodiment of the present invention will be described with reference to FIG.
１は内部を吸気道２が貫通し、気化器本体１の側部に
は浮子室本体３が配置され、この気化器本体１の下側凹
部と浮子室本体３とによって浮子室４が形成される。５
は燃料入口Ｈに連なり浮子室４内に開口するバルブシー
トであり、このバルブシート５に対応してフロートバル
ブ６が移動自在に配置され、さらにこのフロートバルブ
６は、浮子室４内に配置されて、フロートアーム７にて
ピン８に回動自在に軸支されたフロート９の前記フロー
トアーム７に対応して配置される。そしてフロート９の
ピン８に対する回動によってフロートアーム７をして、
フロートバルブ６にてバルブシート５を開閉制御するも
のである。1, an intake passage 2 penetrates the inside, and a float chamber main body 3 is disposed on a side portion of the vaporizer main body 1, and a float chamber 4 is formed by the lower concave portion of the vaporizer main body 1 and the float chamber main body 3. You. 5
Is a valve seat that communicates with the fuel inlet H and opens into the float chamber 4. A float valve 6 is movably arranged corresponding to the valve seat 5, and the float valve 6 is further arranged in the float chamber 4. Thus, the float 9 rotatably supported by the pin 8 by the float arm 7 is arranged corresponding to the float arm 7. Then, the float arm 7 is turned by the rotation of the float 9 with respect to the pin 8,
The opening and closing of the valve seat 5 is controlled by the float valve 6.
また10は主燃料系としての主ノズルであって、その先
端は吸気道２内に突出して開口して、他端は浮子室４内
に形成される一定液面Ｘ−Ｘ下に配置された主燃料ジェ
ット11に連なる。また12は吸気道２を開閉制御する絞り
弁である。Reference numeral 10 denotes a main nozzle as a main fuel system, the tip of which protrudes into the intake passage 2 and is opened, and the other end is disposed below a certain liquid level XX formed in the float chamber 4. Connects to main fuel jet 11. Reference numeral 12 denotes a throttle valve for controlling the opening and closing of the intake passage 2.
以上の構造は従来公知の技術であり、本発明になる気
化器の始動装置は前記目的達成の為に以下の通りとした
ものである。The above structure is a conventionally known technique, and the starting device of the vaporizer according to the present invention is as follows to achieve the above object.
即ち、20は浮子室４と隔別して、しかも内部を始動燃
料ポンプ室21と大気室22とに区分するダイヤフラム等の
区画体であり、具体的には始動燃料ポンプ室21は区画体
20と浮子室本体３の凹部によって形成され、大気室22は
区画体20とカバー23とによって形成される。尚Ｊは大気
室22を大気に連通する大気孔である。That is, reference numeral 20 denotes a partition such as a diaphragm which is separated from the float chamber 4 and divides the inside into a starting fuel pump chamber 21 and an atmosphere chamber 22. Specifically, the starting fuel pump chamber 21 is a partition
The air chamber 22 is formed by the partition 20 and the cover 23. Note that J is an atmospheric hole that communicates the atmosphere chamber 22 with the atmosphere.
そして、この始動燃料ポンプ室21には次の名路が開口
される。すなわち、24は内部に吸入側逆止弁25を備え、
浮子室４の一定液面下とを連絡する始動燃料流入路であ
り、該始動燃料流入路には吸入側逆止弁25に対応して吸
入弁座26が形成され、吸入側逆止弁25はスプリング27に
て吸入弁座26に押圧される。The following route is opened in the starting fuel pump chamber 21. That is, 24 has a suction-side check valve 25 inside,
The starting fuel inflow passage communicates with a certain level below the float chamber 4, and a suction valve seat 26 is formed in the starting fuel inflow passage corresponding to the suction-side check valve 25. Is pressed against the suction valve seat 26 by the spring 27.
28は、一端が始動燃料ポンプ室21の略中央部に開口
し、他端が絞り弁12より機関側（図において左側）の吸
気道２に開口した始動燃料吐出路であり、該始動燃料吐
出路には、吐出弁座29と吐出弁座29をスプリング30にて
押圧されて閉塞する吐出側逆止弁31が配置される。Reference numeral 28 denotes a starting fuel discharge passage whose one end is opened at a substantially central portion of the starting fuel pump chamber 21 and whose other end is opened to the intake passage 2 on the engine side (left side in the figure) from the throttle valve 12. In the path, a discharge valve seat 29 and a discharge-side check valve 31 that closes the discharge valve seat 29 by being pressed by a spring 30 are arranged.
また、前記始動燃料吐出路の始動燃料ポンプ室21への
開口端部には弁座32が形成される。A valve seat 32 is formed at the opening end of the starting fuel discharge passage toward the starting fuel pump chamber 21.
また33は区画体20と一体的に設けた開閉弁部であり、
この開閉弁部33は始動燃料吐出路28の端部の弁座32に対
応して配置され、この弁座32を区画体20の移動に応じて
開閉し、もって始動燃料吐出路28を開閉制御する。さら
に区画体20には操作杆34が一体的に配置されるもので、
この操作杆34を移動することによって区画体20と開閉弁
部33が同期的に移動する。Ｎは操作杆34（区画体20、開
閉弁部33も含めて）を、始動燃料ポンプ室21側へ全押圧
した第１状態（第１図の状態）と、大気室22側へ全引っ
張りの第２状態（図において左へいっぱい引っ張る第２
図の状態）との略中間部に保持する為の中間位置規制部
材であり、具体的には操作杆34に溝34Aを穿設するとと
もに、操作杆34の中間位置への操作時に前記溝34Aに弾
性力をもって操作杆34に直交して押圧力を付与するボー
ル35及びスプリング36とよりなる。Reference numeral 33 denotes an opening / closing valve unit provided integrally with the partition body 20,
The opening / closing valve portion 33 is arranged corresponding to the valve seat 32 at the end of the starting fuel discharge passage 28, and opens and closes the valve seat 32 in accordance with the movement of the partition body 20, thereby controlling the opening and closing of the starting fuel discharge passage 28. I do. Further, the operating rod 34 is integrally arranged on the partition body 20,
By moving the operating rod 34, the partition 20 and the on-off valve portion 33 move synchronously. N indicates a first state (the state shown in FIG. 1) in which the operating rod 34 (including the partition body 20 and the opening / closing valve section 33) is fully pressed toward the starting fuel pump chamber 21 and a state in which the operating rod 34 is fully pulled toward the atmosphere chamber 22. The second state (the second pulling state to the left in the figure)
(A state shown in the figure) and an intermediate position regulating member for holding it at a substantially intermediate portion. Specifically, a groove 34A is formed in the operation rod 34, and the groove 34A is operated when the operation rod 34 is operated to the intermediate position. A ball 35 and a spring 36 that apply a pressing force perpendicular to the operating rod 34 with elastic force.
また、37は大気室22内に縮設され一端がカバー23に、
他端が区画体20に係止されて、区画体20を始動燃料ポン
プ室21側へ押圧するスプリングである。Also, 37 is contracted in the atmosphere chamber 22 and one end is in the cover 23,
The other end is a spring which is locked to the partition 20 and presses the partition 20 toward the starting fuel pump chamber 21.
尚、前記した中間位置規制部材Ｎの操作時においてボ
ール35がスプリング36にて操作杆34の溝34Aに対し操作
杆34の長手軸心方向Ｙ−Ｙに直角方向に作用する押圧力
は、かかる操作杆34の中間位置状態におけるスプリング
37の操作杆34の長手軸心方向Ｙ−Ｙに対する押圧力より
大なるものであり、これによって操作杆34を中間位置に
保持できたものである。When the above-described intermediate position regulating member N is operated, the pressing force of the ball 35 acting on the groove 34A of the operating rod 34 by the spring 36 in the direction perpendicular to the longitudinal axis direction Y-Y of the operating rod 34 is applied. Spring in the middle position of the operating rod 34
37 is greater than the pressing force of the operating rod 34 in the longitudinal axis direction YY, whereby the operating rod 34 can be held at the intermediate position.
次にその作用について説明する。 Next, the operation will be described.
まず、機関雰囲気温度及び機関温度の高い場合につい
て説明すると、温度が高いことより機関へ濃混合気を供
給する必要がない。First, the case where the engine ambient temperature and the engine temperature are high will be described. Since the temperature is high, it is not necessary to supply a rich mixture to the engine.
従って始動装置は不動作状態に保持される。この状態
は第１図に示されるもので、区画体20はスプリング37に
よって始動燃料ポンプ室21側へ押圧されるものであり、
区画体20と一体的に設けた開閉弁部33は始動燃料吐出路
28の始動燃料ポンプ室21側への開口端部に配置した弁座
32を閉塞するものであり、始動燃料吐出路28から吸気道
２内への始動用燃料の供給が行なわれることはなく機関
温度にあった燃料は主ノズル10及び低速噴孔（図示せ
ず）より吸気管に供給されて始動を満足させるものであ
る。The starting device is therefore kept inactive. This state is shown in FIG. 1, in which the partition 20 is pressed by the spring 37 toward the starting fuel pump chamber 21.
The opening / closing valve section 33 provided integrally with the partition body 20 is a starting fuel discharge path.
Valve seat located at the opening end of the starting fuel pump chamber 21 on the side of 28
The starting fuel is not supplied from the starting fuel discharge passage 28 into the intake passage 2 and the fuel at the engine temperature is supplied to the main nozzle 10 and the low-speed injection hole (not shown). It is supplied to the intake pipe to satisfy the start.
次に機関雰囲気温度の低い状態における始動について
のべると、機関の始動操作に先立ち、先ず操作杆34をス
プリング37のバネ力に抗して図において左方へいっぱい
に引く、この状態は第２図に明示される。この操作によ
って区画体20及び開閉弁部33も操作杆34と同期的に左方
へ移動するものであり、開閉弁部33が弁座32を開放する
とともに始動燃料ポンプ室21の室容積を増加させる。Next, regarding the start in a state where the engine ambient temperature is low, prior to the start operation of the engine, first, the operating rod 34 is fully pulled to the left in the drawing against the spring force of the spring 37, as shown in FIG. Explicitly. By this operation, the partition body 20 and the opening / closing valve section 33 also move to the left in synchronization with the operating rod 34, and the opening / closing valve section 33 opens the valve seat 32 and increases the volume of the starting fuel pump chamber 21. Let it.
これによると、吸入側逆止弁25は吸入弁座26を開放す
るとともに、吐出側逆止弁31が吐出弁座29を閉塞する。According to this, the suction side check valve 25 opens the suction valve seat 26, and the discharge side check valve 31 closes the discharge valve seat 29.
従って、かかる操作によって、浮子室４内に貯溜され
ている燃料は始動燃料ポンプ室21内に吸入される。Therefore, by this operation, the fuel stored in the float chamber 4 is sucked into the starting fuel pump chamber 21.
次に、操作杆34に対する左方向の引操作力を開放する
もので、これによると、操作杆34はスプリング37のバネ
力によって図において始動燃料ポンプ室21側へ（右方
へ）自動的に移動するものであり、操作杆34は溝34Aが
中間位置規制部材Ｎとしてのボール35と係合した状態に
て停止する。（この状態は第３図に示される。） この操作杆34が中間位置で停止することはスプリング
37の操作杆34の長手軸心方向Ｙ−Ｙの張力に対して直角
方向に作用するボール44のスプリング36による押圧力を
適正に強めることによって達成できるものである。Next, the left pulling force on the operating rod 34 is released. According to this, the operating rod 34 is automatically (to the right) toward the starting fuel pump chamber 21 in the figure by the spring force of the spring 37. The operation rod 34 stops in a state where the groove 34A is engaged with the ball 35 as the intermediate position regulating member N. (This state is shown in FIG. 3.) When the operating rod 34 stops at the intermediate position,
This can be achieved by appropriately increasing the pressing force of the spring 36 of the ball 44 acting in the direction perpendicular to the tension in the longitudinal axis direction Y-Y of the operating rod 34 of 37.
かかる操作杆34の中間位置への移動によると、始動燃
料ポンプ室21が圧縮されて室容積を減少されるので、吐
出側逆止弁31が吐出弁座29を開放して始動燃料吐出路28
より吸気道２内へ始動燃料を噴射供給され、もって、機
関の初，完爆に備えることができ、そしてかかる操作杆
34の左方へいっぱいに引く工程、中間位置へ戻す為の操
作杆に対する引力を解除する復帰工程を経た状態におい
て機関始動の為のクランキング動作に入る。すると、吸
気管内には始動燃料ポンプ室21内の燃料が始動燃料吐出
路28よりすでに噴射供給されているので、機関には充分
濃厚なる混合気を供給でき機関の初爆，完爆を確実に得
ることができる。According to the movement of the operating rod 34 to the intermediate position, the starting fuel pump chamber 21 is compressed and the chamber volume is reduced, so that the discharge side check valve 31 opens the discharge valve seat 29 and the starting fuel discharge passage 28
The starting fuel is injected and supplied into the intake passage 2 to prepare for the first and complete explosion of the engine.
A cranking operation for starting the engine is started after a step of fully pulling to the left of 34 and a return step of releasing the pulling force on the operating rod for returning to the intermediate position. Then, since the fuel in the starting fuel pump chamber 21 has already been injected and supplied from the starting fuel discharge passage 28 into the intake pipe, a sufficiently rich air-fuel mixture can be supplied to the engine, and the first explosion and complete explosion of the engine can be reliably performed. Obtainable.
そして、機関の完爆後の暖機運転状態に入ると、操作
杆34が中間位置に保持され弁座32は開閉弁部33にて開状
態に保持されているので、吸気管に発生する機関の負厚
が始動燃料吐出路28より吐出逆止弁29に作用し、スプリ
ング30のバネ力に抗して吐出側逆止弁31を吐出弁座29よ
り開き、始動燃料ポンプ室21内の燃料を始動燃料吐出路
28より吸気道２に供給して暖機運転を満足させるもので
ある。Then, when the engine enters a warm-up operation state after a complete explosion, the operating rod 34 is held at the intermediate position and the valve seat 32 is held open by the on-off valve portion 33. The negative thickness acts on the discharge check valve 29 from the start fuel discharge passage 28, opens the discharge side check valve 31 from the discharge valve seat 29 against the spring force of the spring 30, and the fuel in the start fuel pump chamber 21 The starting fuel discharge path
This is supplied to the intake passage 2 from 28 to satisfy the warm-up operation.
また、暖機運転時間は機関の性能，雰囲気温度によっ
て異なるが、操作杆34の中間位置規制部材Ｎにより中間
位置にあって開閉弁部33が弁座32を開放保持してるので
始動燃料ポンプ室21内には始動燃料吐出路28より吸入負
圧が作用するので吸入側逆止弁25が吸入弁座26を開放し
て浮子室４内の燃料を順次供給することができるので何
等問題となることはない。Although the warm-up operation time varies depending on the performance of the engine and the ambient temperature, the starting fuel pump chamber is located at the intermediate position by the intermediate position regulating member N of the operating rod 34 and the opening / closing valve portion 33 holds the valve seat 32 open. Since a suction negative pressure acts on the inside of the fuel injection passage 21 from the starting fuel discharge passage 28, the suction-side check valve 25 opens the suction valve seat 26 and can supply the fuel in the float chamber 4 sequentially, causing no problem. Never.
次いで、機関の暖機運転が終了するや、操作杆34は第
３図の中間開度状態から第１図の原位置の状態に復帰さ
れる。これによると、開閉弁部33は弁座32を閉塞するの
で、始動燃料ポンプ室21内から始動燃料吐出路28へ燃料
が流出することはない。Next, when the warm-up operation of the engine is completed, the operating rod 34 is returned from the intermediate opening state in FIG. 3 to the original position in FIG. According to this, since the on-off valve portion 33 closes the valve seat 32, fuel does not flow out of the starting fuel pump chamber 21 to the starting fuel discharge passage 28.
また、機関の運転中において、始動燃料吐出路28に吸
気道２内の負圧が作用し、吐出側逆止弁31をスプリング
30のバネ力に抗して吐出弁座29より開放することが予測
されるが、仮にこの始動燃料吐出路28が開放しても、こ
の負圧は即座に開閉弁部33の下部に作用し、開閉弁部33
を弁座32へ押圧するものであり、他方開閉弁部33はスプ
リング37にて弁座32の閉塞側へ押圧されているので完全
に始動燃料吐出路28は閉塞保持されて無用な燃料が吸気
道２へ吸出されることはなく、機関の通常運転を阻害す
るものではない。Also, during operation of the engine, a negative pressure in the intake passage 2 acts on the starting fuel discharge passage 28, and the discharge-side check valve 31 is
It is predicted that the opening will be opened from the discharge valve seat 29 against the spring force of 30. Even if the starting fuel discharge passage 28 is opened, this negative pressure will immediately act on the lower part of the on-off valve portion 33. , On-off valve part 33
On the other hand, the opening / closing valve portion 33 is pressed by the spring 37 toward the closing side of the valve seat 32, so that the starting fuel discharge path 28 is completely closed and held, and unnecessary fuel is sucked. It is not sucked into the road 2 and does not hinder normal operation of the engine.
以上の如く本発明になる気化器の始動装置によると、
次の効果を有する。As described above, according to the vaporizer starting device according to the present invention,
It has the following effects.
機関雰囲気温度の低い状態における始動時の特に初，
完爆時において、始動燃料ポンプ室内の燃料を吸気道負
圧に頼ることなく始動燃料吐出路より機関の初，完爆に
適した所望の始動燃料を直接吸気道に噴射供給したので
確実な機関の始動を得ることができる。Especially at the time of starting at low engine ambient temperature,
At the time of a complete explosion, the desired starting fuel suitable for a complete explosion was directly injected into the intake passage from the starting fuel discharge passage without relying on the intake passage negative pressure for the fuel in the starting fuel pump chamber. You can get a start.
機関の暖機運転時には吸気管に生起する負圧によって
始動燃料吐出路より始動用燃料が吸気道に自動的に吐出
されるので暖機運転性の向上を図りうるものである。During the warm-up operation of the engine, the start-up fuel is automatically discharged from the start-up fuel discharge passage to the intake passage due to the negative pressure generated in the intake pipe, so that the warm-up operability can be improved.
機関の始動時における操作は操作杆を大気室側へ引
き、次いでその引力を解除することによって自動的に操
作杆を中間位置に配置し機関の初，完爆に必要な始動用
燃料を供給でき、一方機関の暖機運転は前記操作杆の中
間位置の状態のままで暖機運転に備えることができ、暖
機運転の終了時において操作杆を始動燃料ポンプ室側へ
押圧して原位置に復帰させればよく、その始動時におけ
る操作が極めて簡単となり、始動に全く熟練を必要とす
ることがなく、特に船外機、汎用機関の始動装置として
好適である。When the engine is started, the operating rod is pulled toward the atmosphere chamber and then released, and the operating rod is automatically placed in the middle position to supply the starting fuel necessary for the first and complete explosion of the engine. On the other hand, the warm-up operation of the engine can be prepared for the warm-up operation while maintaining the intermediate position of the operation rod, and at the end of the warm-up operation, the operation rod is pressed toward the starting fuel pump chamber to return to the original position. It is only necessary to return it, and the operation at the time of the start becomes extremely simple, and no skill is required for the start, and it is particularly suitable as a starter of an outboard motor or a general-purpose engine.
始動時における始動燃料の噴射量は、操作杆を始動燃
料ポンプ室側へ押圧するスプリングのバネ力によって常
に一定に決められるので、操作杆の始動燃料ポンプ室に
対する押圧する押圧速度が変化することがなく、操作者
の意志にかかわることなく設定された一定の始動燃料が
常に機関に供給されるのでその始動性は確実に且つ良好
に行なえるものである。Since the injection amount of the starting fuel at the time of starting is always determined to be constant by the spring force of the spring that presses the operating rod toward the starting fuel pump chamber, the pressing speed at which the operating rod presses the starting fuel pump chamber may change. In addition, the engine is always supplied with a fixed starting fuel set without regard to the operator's intention, so that the starting performance can be surely and well performed.
さらにまた、機関の運転中において、吸気道に発生す
る負圧は区画体の開閉弁部と弁座によって完全に遮断で
きたので、開閉弁部より外方にある区画体に何等の負圧
が作用するものでなく、区画体をダイヤフラム等の弾性
ゴム材質にて形成した際の区画体の耐久性を貯しく向上
できたもので長期に渡って安定した気化器の始動装置を
提供できたものである。Furthermore, during the operation of the engine, the negative pressure generated in the intake passage was completely shut off by the on-off valve portion and the valve seat of the compartment, so that any negative pressure was applied to the compartment outside the on-off valve portion. It does not work, but it can improve the durability of the partition when the partition is formed of an elastic rubber material such as a diaphragm, and can provide a stable vaporizer starting device for a long time. It is.
第１図は本発明になる気化器の始動装置の始動燃料吐出
路の閉状態を示す縦断面図、第２図は第１図における操
作杆を大気室側へいっぱい迄引いた状態を示す要部縦断
面図、第３図は第２図の状態より操作杆を中間位置迄復
帰させた状態を示す要部縦断面図である。 １……気化器本体、４……浮子室、20……区画体、21…
…始動燃料ポンプ室、22……大気室、24……始動燃料流
入路、25……吸入側逆止弁、28……始動燃料吐出路、31
……吐出側逆止弁、32……弁座、33……開閉弁部、34…
…操作杆、37……スプリング、Ｎ……中間開度規制部材FIG. 1 is a longitudinal sectional view showing a closed state of a starting fuel discharge passage of a starting device for a carburetor according to the present invention, and FIG. 2 is a view showing a state in which an operating rod in FIG. FIG. 3 is a longitudinal sectional view of a main part showing a state where the operating rod is returned to the intermediate position from the state of FIG. 1 ... vaporizer main body, 4 ... float room, 20 ... compartment, 21 ...
... Start fuel pump chamber, 22 ... Atmosphere chamber, 24 ... Start fuel inflow passage, 25 ... Suction side check valve, 28 ... Start fuel discharge passage, 31
…… Discharge-side check valve, 32 …… Seat, 33 …… On-off valve part, 34…
… Operating rod, 37… spring, N… intermediate opening regulating member
Claims (2)
側部に浮子室本体３を配置し、気化器本体１と、浮子室
本体３とによって内部に一定液面を貯溜せる浮子室４を
形成した気化器において； 内部を区画体20にて始動燃料ポンプ室21と大気室22とに
区分し、始動燃料ポンプ室21には、内部に吸入側逆止弁
25を配置し、浮子室４の一定液面下に連絡される始動燃
料流入路24と、内部に吐出側逆止弁31を配置せる始動燃
料吐出路28とを開口し、さらにスプリング37にて始動燃
料ポンプ室21側に押圧される区画体20には、前記始動燃
料吐出路を開閉制御し得る開閉弁部33と、区画体20にポ
ンプ動作力を付与し得る操作杆34とを一体的に設けると
ともに、前記操作杆には、区画体20の開閉弁部33にて始
動燃料吐出路28を閉塞した第１状態と、区画体20を大気
室22側へ引いた第２状態との略中間位置に保持し得る中
間位置規制部材Ｎを設け、第２状態より操作杆34に対す
る引力を解除した際、スプリング37のバネ力によって区
画体20を略中間位置迄自動復帰させ、始動燃料ポンプ室
21内の燃料を始動燃料吐出路28を介して吐出してなる気
化器の始動装置。1. A float for disposing a float chamber body 3 on a side of a carburetor body 1 through which an intake passage 2 penetrates, and for storing a constant liquid level inside the float chamber body 1 and the float chamber body 3. In the carburetor in which the chamber 4 is formed; the interior is divided into a starting fuel pump chamber 21 and an atmosphere chamber 22 by a partition body 20, and the starting fuel pump chamber 21 has a suction-side check valve therein.
A starting fuel inflow passage 24 communicating below a certain level of the float chamber 4 and a starting fuel discharge passage 28 in which a discharge-side check valve 31 is disposed are opened. The partition 20 pressed toward the starting fuel pump chamber 21 integrally includes an opening / closing valve portion 33 that can control opening and closing of the starting fuel discharge path and an operating rod 34 that can apply a pump operating force to the partition 20. The operating rod includes a first state in which the starting fuel discharge passage 28 is closed by the on-off valve portion 33 of the partition 20 and a second state in which the partition 20 is pulled to the atmosphere chamber 22 side. An intermediate position regulating member N which can be held at the intermediate position is provided, and when the attractive force on the operating rod 34 is released from the second state, the partition 20 is automatically returned to the substantially intermediate position by the spring force of the spring 37, and the starting fuel pump chamber
A starting device for a carburetor that discharges the fuel in 21 through a starting fuel discharge passage 28.
部に設けた溝34Aと、該溝に弾性的に押圧され、且つス
プリング36の操作杆34の長手軸心方向Ｙ−Ｙに付勢する
押圧力に打ち勝って前記操作杆を一定位置に保持するボ
ール35と、により形成してなる特許請求の範囲第１項記
載の気化器の始動装置。2. A groove 34A in which the intermediate opening regulating member N is provided in a part of the operation rod 34, and a longitudinal axis direction Y- of the operation rod 34 of the spring 36 which is elastically pressed by the groove. 2. A carburetor starting device according to claim 1, wherein said starting member is formed by a ball 35 which overcomes the pressing force applied to Y and holds said operating rod at a fixed position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321073A JP2583432B2 (en) | 1987-12-18 | 1987-12-18 | Starter for vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321073A JP2583432B2 (en) | 1987-12-18 | 1987-12-18 | Starter for vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01163447A JPH01163447A (en) | 1989-06-27 |
| JP2583432B2 true JP2583432B2 (en) | 1997-02-19 |
Family
ID=18128504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62321073A Expired - Fee Related JP2583432B2 (en) | 1987-12-18 | 1987-12-18 | Starter for vaporizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583432B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002272371A (en) * | 2001-03-22 | 2002-09-24 | Kawasaki Kiko Co Ltd | Apparatus for removing foreign material |
| JP4633950B2 (en) * | 2001-03-22 | 2011-02-16 | カワサキ機工株式会社 | Foreign matter removal device |
| JP2002306069A (en) * | 2001-04-17 | 2002-10-22 | Kawasaki Kiko Co Ltd | Foreign substance remover from raw tea leaves |
-
1987
- 1987-12-18 JP JP62321073A patent/JP2583432B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01163447A (en) | 1989-06-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |