JPH0552423B2 - - Google Patents
Info
- Publication number
- JPH0552423B2 JPH0552423B2 JP62072195A JP7219587A JPH0552423B2 JP H0552423 B2 JPH0552423 B2 JP H0552423B2 JP 62072195 A JP62072195 A JP 62072195A JP 7219587 A JP7219587 A JP 7219587A JP H0552423 B2 JPH0552423 B2 JP H0552423B2
- Authority
- JP
- Japan
- Prior art keywords
- starting
- fuel
- starting fuel
- storage chamber
- engine
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 131
- 239000007788 liquid Substances 0.000 claims description 10
- 230000035485 pulse pressure Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000007858 starting material Substances 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
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２サイク
ル機関に使用される気化器の始動装置に関するも
のである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a carburetor for controlling the concentration and amount of air-fuel mixture supplied to an engine, and in particular to a starting device for a carburetor used in a two-stroke engine. It is related to.
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ヨーク
弁を配置して機関の始動時にチヨーク弁にて吸気
道を全閉状態に保持するいわゆるチヨーク型のも
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
ータ型のものとがある。
Conventionally, the starting device for a two-stroke engine carburetor that is commonly used is a so-called chi-yoke system, in which a chi-yoke valve is placed in the intake passage of the carburetor and the intake passage is kept fully closed by the chi-yoke valve when the engine is started. type, and a so-called type in which the front and back of the throttle valve placed in the intake duct are connected by a starting passage, and a starter on-off valve is placed in the starting passage, and the starter on-off valve holds the starting passage in an open state when the engine is started. There is also a starter type.
かかる従来の始動装置は次の問題点を有する。 Such conventional starting devices have the following problems.
すなわち、前者によると、始動時において、チ
ヨーク弁を閉じ機関のクランキング動作すると、
このクラツキングによつて生起する吸気道負圧が
チヨーク弁のチヨーク効果によつて高められ、も
つ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ツテイングされるもの
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
ツテイング作業に多くの時間が費やされる。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に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, according to the former, when the engine is cranked by closing the engine valve at startup,
The negative pressure in the intake tract caused by this cracking is increased by the chi-yoke effect of the chi-yoke valve, and the increased negative pressure in the intake tract acts on the low-velocity nozzle holes, main nozzle, etc. that open in the intake tract. The low-speed fuel system leading to these low-speed nozzles and the main fuel system leading to the main nozzle are designed to suck out fuel from the nozzle holes and supply starting fuel to the engine, respectively. These low-speed fuel systems,
In order to adjust the main fuel system, a lot of time is spent on setting up the main fuel system. That is, when the low-speed fuel system or the main fuel system that has been set is changed to improve starting performance, it is necessary to test the low-speed fuel system and the main fuel system again for confirmation.
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
セツテイ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。 Also, according to the latter, the low-speed fuel system and the main fuel system have a starting passage as completely separate systems, so there is no connection between the low-speed fuel system and the main fuel system like the former, making setting work easier, but the engine When the throttle valve is opened at the time of starting the engine, it is difficult to obtain a high intake negative pressure in the intake tract, which makes it impossible to draw out the starting fuel, which may deteriorate the starting performance.
本発明になる２サイクル機関用気化器の始動装
置は前記不具合点に鑑み、始動性向上の為のセツ
テイング作業が容易で且つ最適始動燃料を供給し
得る始動性の良好な前記装置を提供することにあ
り、前記目的達成の為に、浮子室として隔別して
始動燃料貯留室を設け、該始動燃料留室には暖機
燃料ジエツトを介して浮子室の一定液面下に連結
されるとともに暖機空気ジエツトを介して大気と
連通し、さらに始動燃料貯留室には、機関のクラ
ンクケース内に生起するパルス圧力にて駆動され
る始動用燃料ポンプ始動燃料吸入路を開口すると
ともに、始動燃料ポンプのポンプ室には始動燃料
吐出路を開口し、さらに始動燃料吸入路または始
動燃料吐出路の何れか一方に常閉型の始動開閉弁
を配置したものである。
In view of the above-mentioned problems, the present invention provides a starting device for a two-stroke engine carburetor that is easy to set up to improve starting performance and has good starting performance that can supply optimal starting fuel. In order to achieve the above purpose, a starting fuel storage chamber is provided separately as a float chamber, and the starting fuel storage chamber is connected to a constant level below the liquid level of the float chamber via a warm-up fuel jet, and a warm-up fuel storage chamber is provided. It communicates with the atmosphere through an air jet, and the starting fuel storage chamber has a starting fuel suction passage for a starting fuel pump driven by the pulse pressure generated in the engine crankcase. A starting fuel discharge passage is opened in the pump chamber, and a normally closed starting opening/closing valve is disposed in either the starting fuel intake passage or the starting fuel discharge passage.
機関の始動時には、まず始動開閉弁を開放して
始動に備え、次いで機関をクランキング動作に入
る。このクランキング動作によつて始動燃料ポン
プは始動燃料貯留室内の燃料を圧送するものであ
つて、この始動用燃料ポンプより圧送される燃料
は例えば機関のクランクケースに噴射供給され
る。
When starting the engine, the starting on-off valve is first opened to prepare for starting, and then the engine begins cranking operation. By this cranking operation, the starting fuel pump pumps the fuel in the starting fuel storage chamber, and the fuel pumped by the starting fuel pump is injected into, for example, the crankcase of the engine.
従つて機関へ濃混合気の供給ができて機関の始
動を容易に可能ならしめることができる。 Therefore, a rich air-fuel mixture can be supplied to the engine and the engine can be started easily.
以下、本発明の一実施例につき第１図によつて
説明する。
Hereinafter, one embodiment of the present invention will be explained with reference to FIG.
Ａは２サイクル機関Ｂへ混合気を供給する気化
器であつて、気化器Ａには燃料タンクＴ内の燃料
が燃料ポンプＰにて圧送される。 A is a carburetor that supplies the air-fuel mixture to the two-stroke engine B, and fuel in a fuel tank T is pumped to the carburetor A by a fuel pump P.
気化器Ａは以下の構成よりなる。すなわち、１
は内部を吸気道２が貫通し、気化器本体１の下側
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とによつて浮子室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に対する回動によつてフロートアー
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。 The vaporizer A has the following configuration. That is, 1
An intake passage 2 passes through the inside of the body, and a float chamber body 3 is disposed below the carburetor body 1.
A float chamber 4 is formed by the lower recessed portion and the float chamber main body 3. 5 is a valve seat connected to the fuel inlet H and opening into the float chamber 4; a float valve 6 is movably disposed corresponding to the valve seat 5; further, this float valve 6 is disposed within the float chamber 4; pin 8 on float arm 7.
The float arm 7 of the float 9 is rotatably supported. The rotation of the float 9 relative to the pin 8 causes the float arm 7 to control the opening and closing of the valve seat 5 in the float valve 6.
また１０は主燃料系としての主ノズルであつ
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下に配置
された主燃料ジエツト１１に連らなる。 Further, 10 is a main nozzle as the main fuel system, the tip of which projects into the intake passage 2 and opens.
The other end is connected to a main fuel jet 11 formed in the float chamber 4 and placed below a constant liquid level.
以上の構造は従来公知の技術であり、本発明に
なる２サイクル機関用気化器の始動装置は前記目
的達成の為に以下の構造とする。即ち、２０は始
動燃料貯留室であつて気化器本体１の側部で且つ
浮子室４と独立して形成される。（気化器本体１
及び浮子室本体３と必ずしも一体である必要はな
い）
そして、この始動燃料貯留室２０の底部は浮子
室４内の一定液面下と暖機燃料ジエツト２１を介
して連結され、さらにその上部は暖機空気ジエツ
ト２２を介して大気と連結されるもので、本実施
例にあつては浮子室４内の一定液面上の大気室Ｋ
と連結される。 The above structure is a conventionally known technique, and the starting device for a two-stroke engine carburetor according to the present invention has the following structure in order to achieve the above object. That is, reference numeral 20 denotes a starting fuel storage chamber, which is formed at the side of the carburetor main body 1 and independently from the float chamber 4. (vaporizer body 1
(The starting fuel storage chamber 20 does not necessarily have to be integrated with the float chamber main body 3.) The bottom of the starting fuel storage chamber 20 is connected to the bottom of the float chamber 4 under a constant liquid level via the warm-up fuel jet 21, and the top thereof is It is connected to the atmosphere via a warm-up air jet 22, and in this embodiment, it is connected to the atmosphere chamber K above a constant liquid level in the float chamber 4.
is connected with.
従つてこの始動燃料貯留室２０内には暖機燃料
ジエツト２１を介して浮子室４内の燃料が貯留さ
れる。この貯留は浮子室４内の一定液面高さＸ−
Ｘと同位となる。 Therefore, the fuel in the float chamber 4 is stored in the starting fuel storage chamber 20 via the warm-up fuel jet 21. This storage occurs at a constant liquid level height in the float chamber 4
It will be on the same level as X.
またＲは２サイクル機関に生起するパルス圧力
にて駆動される始動燃料ポンプであり、ポンプ本
体３０がダイヤフラム等の区画体３１にて燃料室
３２と脈動室３３とに区分されるもので、燃料室
３２には始動燃料貯蔵室２０に連なる始動燃料吸
入路３４と燃料始動吐出路３５が開口し、始動燃
料吸入路３４には吸入側逆止弁３６が配置され、
始動燃料吐出路３５には吐出側逆止弁３７が配置
される。 Further, R is a starting fuel pump driven by pulse pressure generated in a two-stroke engine, and the pump main body 30 is divided into a fuel chamber 32 and a pulsation chamber 33 by a partitioning body 31 such as a diaphragm. A starting fuel intake passage 34 and a fuel starting discharge passage 35 connected to the starting fuel storage chamber 20 are opened in the chamber 32, and a suction side check valve 36 is disposed in the starting fuel intake passage 34.
A discharge side check valve 37 is disposed in the starting fuel discharge passage 35 .
さらにまた、脈動室３３は区画体３１に往復動
を付与すべく、例えば２サイクル機関Ｂのクラン
クケースに連結され、クランクケース内のパルス
圧力を脈動室３３内に導入する。そして、前記始
動燃料叶出路３５の端部は例えば機関Ｂのクラン
クケースに連結されるものであり、この始動燃料
叶出路３５には該路を開閉する常閉型の始動開閉
弁３８が配置される。 Furthermore, the pulsating chamber 33 is connected to, for example, the crankcase of a two-stroke engine B, in order to impart reciprocating motion to the partition body 31, and pulse pressure within the crankcase is introduced into the pulsating chamber 33. The end of the starting fuel outlet passage 35 is connected to, for example, the crankcase of the engine B, and a normally closed type starting on/off valve 38 for opening and closing the starting fuel outlet passage 35 is disposed in the starting fuel outlet passage 35. Ru.
次にその作用について説明する。 Next, its effect will be explained.
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、機関を始動すべく、機関に
クランキング動作を与えると、クランクケースに
生起するパルス圧力によつて始動燃料ポンプは動
作するものであるが始動燃料吐出路３５内に配置
された始動開閉弁３８が該吐出路３５を閉塞保持
しているので始動燃料吐出路３５へ始動用燃料を
供給することはなく、通常の機関始動を行ないう
るものである。 First, to explain when the engine ambient temperature and engine temperature are high, when cranking the engine to start the engine, the starting fuel pump operates due to the pulse pressure generated in the crankcase. Since the starting on-off valve 38 disposed in the starting fuel discharge passage 35 keeps the discharge passage 35 closed, starting fuel is not supplied to the starting fuel discharge passage 35, and the engine can be started normally. It is.
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
始動開閉弁３８を開放した後に機関のクランキン
グ動作するものである。 Next, regarding starting in a state where the engine ambient temperature is low, prior to starting the engine, first, the starting on-off valve 38 is opened, and then the engine is cranked.
これによると、始動用燃料ポンプＲは即座に駆
動し、始動燃料貯留室２０内の始動燃料を始動燃
料吐出路３５を介して機関のクランクケース内へ
供給できるものであり、この始動燃料の吐出量は
暖機燃料ジエツト２１に何等制限されることなく
充分に始動燃料貯留室２０内の燃料を使用できる
ので充分濃厚な混合気を機関へ供給できるもので
ある。 According to this, the starting fuel pump R is immediately driven and can supply the starting fuel in the starting fuel storage chamber 20 into the crankcase of the engine via the starting fuel discharge passage 35, Since the amount of fuel in the starting fuel storage chamber 20 can be used sufficiently without being restricted in any way by the warm-up fuel jet 21, a sufficiently rich mixture can be supplied to the engine.
次いで機関が完爆して暖機運転に入ると、この
時、既に始動燃料貯留室２０内に貯留された燃料
は消費され、暖機燃料ジエツト２１にて制限され
た始動燃料と暖機空気ジエツトにて制限された空
気とが混入した混合気がこの始動用燃料ポンプＲ
を介して始動燃料吐出路３５より供給されるもの
で適度に薄目られた混合気を供給できるので、良
好な暖機運転状態を得ることができるものであ
る。 Next, when the engine completely explodes and enters warm-up operation, the fuel already stored in the starting fuel storage chamber 20 is consumed, and the limited starting fuel and warm-up air jet are used in the warm-up fuel jet 21. This starting fuel pump R
Since the starting fuel is supplied from the starting fuel discharge passage 35 via the starting fuel discharge passage 35, an appropriately diluted air-fuel mixture can be supplied, so that a good warm-up operation state can be obtained.
そして、完全に暖機運転が終了すると、始動開
閉弁３８を元に戻して始動燃料吐出路３５を閉塞
すれば、該吐出路３５よりの燃料の供給は遮断さ
れて通常の気化器による燃料の供給を受け良好な
運転を保持できるものである。 When the warm-up operation is completely completed, the starting on-off valve 38 is returned to its original position to close the starting fuel discharge passage 35, thereby cutting off the supply of fuel from the discharge passage 35 and discharging the fuel from the normal carburetor. It is possible to maintain good operation by receiving the supply.
尚、始動燃料叶出路３５内に配置する始動開閉
弁３８の代わりに脈動室３３内にクランクケース
内の脈動圧力を導入するパルス通路４０内に該パ
ルス通路を開閉する常閉型の始動開閉弁を配置す
れば、始動開閉弁のパレス通路閉塞時において完
全に始動用燃料ポンプＲの駆動を停止できるので
始動用燃料ポンプＲの耐久性の向上を図ることが
できるとともに、浮子室４内への圧力変動を付与
することがないものである。 Note that instead of the starting on-off valve 38 disposed in the starting fuel outlet passage 35, a normally closed starting on-off valve that opens and closes the pulse passage is provided in the pulse passage 40 that introduces the pulsating pressure in the crankcase into the pulsating chamber 33. By arranging this, the driving of the starting fuel pump R can be completely stopped when the palace passage of the starting on-off valve is blocked, so the durability of the starting fuel pump R can be improved, and at the same time, the drive of the starting fuel pump R can be improved. It does not cause pressure fluctuations.
尚、始動用燃料吐出路３５は気化器Ａと機関Ｂ
とを連結する吸気管（図示せず）に連結してもよ
く、また始動開閉弁３８、機関雰囲気温度、機関
温度、等の温度変化を感知し、自動的にそれら弁
を開閉制御することによつて始動操作の自動化を
はかることができ始動操作がより容易となりうる
ものである。 Incidentally, the starting fuel discharge passage 35 is connected to the carburetor A and the engine B.
It may also be connected to an intake pipe (not shown) that connects the engine to the engine, and may also be connected to an intake pipe (not shown) that connects the engine to the engine. Therefore, the starting operation can be automated and the starting operation can be made easier.
以上の如く、本発明になる２サイクル機関雰囲
気化器の始動装置によると、機関の始動時に吸気
道負圧に頼ることなく直接的に始動用燃料ポンプ
による吐出圧力を有する吐出燃料を噴射供給した
ので、機関の着火性の向上を図ることができ始動
性を大きく向上できたものであり、特に機関完爆
後の暖機運転時において、暖機燃料ジエツト、暖
機空気ジエツトにて自動的に始動燃料ポンプより
供給される始動用燃料を薄めることができたので
暖機運転性の良好な始動装置を提供できたもので
ある。
As described above, according to the starting device for a two-stroke engine atmosphere generator according to the present invention, when starting the engine, the discharge fuel having the discharge pressure is directly injected and supplied by the starting fuel pump without relying on the negative pressure in the intake passage. Therefore, the ignitability of the engine can be improved, and the startability can be greatly improved.Especially when warming up the engine after a complete explosion, the warm-up fuel jet and warm-up air jet are automatically activated. Since the starting fuel supplied from the starting fuel pump could be diluted, it was possible to provide a starting device with good warm-up performance.
さらにまた気化器の吸気道とは全く別に始動用
燃料吐出路を設けたので特に多気筒機関に多連気
化器をもつて混合気を供給するようにしたものに
あつて、始動用燃料吐出路の燃料を単に分配すれ
ばよいので機関全体としての始動系統のまとめを
容易に行なうことができる。 Furthermore, since the starting fuel discharge passage is provided completely separate from the intake passage of the carburetor, the starting fuel discharge passage is particularly useful in multi-cylinder engines equipped with multiple carburetors to supply air-fuel mixture. Since it is only necessary to distribute the fuel, the starting system for the entire engine can be easily organized.
第１図は本発明になる２サイクル機関用気化器
の始動装置の一実施例を示す気化器断面図を含む
全体構成図である。
Ａ……気化器、Ｂ……２サイクル機関、Ｐ……
燃料ポンプ、Ｔ……燃料タンク、Ｒ……始動用燃
料ポンプ、Ｈ……燃料入口、２０……始動燃料貯
留室、２１……暖機用燃料ジエツト、２２……暖
機用空気ジエツト、３５……始動燃料吐出路、３
８……始動開閉弁。
FIG. 1 is an overall configuration diagram including a sectional view of the carburetor, showing an embodiment of the starting device for a two-cycle engine carburetor according to the present invention. A... Carburizer, B... 2-cycle engine, P...
Fuel pump, T... Fuel tank, R... Fuel pump for starting, H... Fuel inlet, 20... Starting fuel storage chamber, 21... Fuel jet for warming up, 22... Air jet for warming up, 35 ...Starting fuel discharge passage, 3
8...Start on/off valve.
Claims (1)
るパスル圧力にて駆動される燃料ポンプによつて
気化器の浮子室内へ燃料を供給する２サイクル機
関において； 浮子室と隔別して始動燃料貯溜室を設け、始動
燃料貯溜室の底部には浮子室の一定液面下に連な
る暖機燃料ジエツトを開口するとともに始動燃料
貯溜室の上部にあつて始動燃料貯溜室内に形成さ
れる一定液面上には大気に連なる暖機空気ジエツ
トを開口し、さらに、始動燃料貯溜室の底部に
は、機関のクランクケース内に生起するパルス圧
力にて駆動される始動用燃料ポンプの始動燃料吸
入路を開口するとともに始動用燃料ポンプのポン
プ室には機関のクランクケース又は吸気管に連な
る始動燃料吐出路を開口し、さらに、前記始動燃
料吸入路又は始動燃料吐出路の何れか一方に常閉
型の始動開閉弁を配置してなる２サイクル機関用
気化器の始動装置。 ２ ２サイクル機関のクランクケース内に生起す
るパルス圧力にて駆動される燃料ポンプによつて
気化器の浮子室内へ燃料を供給する２サイクル機
関において； 浮子室と隔別して始動燃料貯溜室を設け、始動
燃料貯溜室の底部には浮子室の一定液面下に連な
る暖機燃料ジエツトを開口するとともに始動燃料
貯溜室の上部にあつて始動燃料貯溜室内に形成さ
れる一定液面上には大気に連なる暖機空気ジエツ
トを開口し、さらに、始動燃料貯溜室の底部に
は、機関のクランクケース内に生起するパルス圧
力にて駆動される始動用燃料ポンプの始動燃料吸
入路を開口するとともに始動用燃料ポンプのポン
プ室には機関のクランクケース又は吸気管に連な
る始動燃料吐出路を開口し、さらに、始動燃料ポ
ンプのパルス通路に常閉型の始動開閉弁を配置し
てなる２サイクル機関用気化器の始動装置。[Claims] 1. In a two-stroke engine that supplies fuel into the float chamber of the carburetor by a fuel pump driven by pulse pressure generated in the crankcase of the two-stroke engine; started separately from the float chamber; A fuel storage chamber is provided, and a warm-up fuel jet is opened at the bottom of the starting fuel storage chamber and extends below the constant liquid level in the float chamber, and a constant liquid formed in the starting fuel storage chamber is located at the top of the starting fuel storage chamber. A warm-up air jet connected to the atmosphere is opened on the surface, and a starting fuel intake passage for the starting fuel pump, which is driven by the pulse pressure generated in the engine crankcase, is located at the bottom of the starting fuel storage chamber. At the same time, a starting fuel discharge passage connected to the engine crankcase or intake pipe is opened in the pump chamber of the starting fuel pump, and a normally closed type is provided in either the starting fuel intake passage or the starting fuel discharge passage. A starting device for a two-stroke engine carburetor, which is equipped with a starting on-off valve. 2. In a two-stroke engine that supplies fuel into the float chamber of the carburetor by a fuel pump driven by pulse pressure generated in the crankcase of the two-stroke engine; a starting fuel storage chamber is provided separate from the float chamber; At the bottom of the starting fuel storage chamber, a warm-up fuel jet is opened that is below the constant liquid level in the float chamber, and at the top of the starting fuel storage chamber, above the constant liquid level formed inside the starting fuel storage chamber, a warm-up fuel jet is opened that is connected to the constant liquid level formed in the starting fuel storage chamber. A series of warm-up air jets are opened, and at the bottom of the starting fuel storage chamber, a starting fuel suction passage for a starting fuel pump, which is driven by the pulse pressure generated in the engine crankcase, is opened, and a starting fuel intake passage is opened at the bottom of the starting fuel storage chamber. A two-cycle engine carburetor has a starting fuel discharge passage connected to the engine crankcase or intake pipe opened in the pump chamber of the fuel pump, and a normally closed starting opening/closing valve arranged in the pulse passage of the starting fuel pump. device starting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7219587A JPS63239346A (en) | 1987-03-26 | 1987-03-26 | Carburetor starter for two-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7219587A JPS63239346A (en) | 1987-03-26 | 1987-03-26 | Carburetor starter for two-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63239346A JPS63239346A (en) | 1988-10-05 |
| JPH0552423B2 true JPH0552423B2 (en) | 1993-08-05 |
Family
ID=13482194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7219587A Granted JPS63239346A (en) | 1987-03-26 | 1987-03-26 | Carburetor starter for two-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63239346A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2720990B2 (en) * | 1988-10-14 | 1998-03-04 | 三信工業株式会社 | Outboard motor fuel supply device with vertical crankshaft |
| JPH02227541A (en) * | 1989-02-28 | 1990-09-10 | Keihin Seiki Mfg Co Ltd | Starting device for carburator for two cycle engine |
| JP4814657B2 (en) | 2006-03-07 | 2011-11-16 | ハスクバーナ・ゼノア株式会社 | 2-cycle engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4736562U (en) * | 1971-05-13 | 1972-12-22 | ||
| JPS531541B2 (en) * | 1971-12-01 | 1978-01-19 | ||
| JPS55164747A (en) * | 1979-06-08 | 1980-12-22 | Nippon Soken Inc | Fuel feed device for engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531541U (en) * | 1976-06-24 | 1978-01-09 | ||
| JPS60141455U (en) * | 1984-02-29 | 1985-09-19 | 小松ゼノア株式会社 | engine starting device |
-
1987
- 1987-03-26 JP JP7219587A patent/JPS63239346A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4736562U (en) * | 1971-05-13 | 1972-12-22 | ||
| JPS531541B2 (en) * | 1971-12-01 | 1978-01-19 | ||
| JPS55164747A (en) * | 1979-06-08 | 1980-12-22 | Nippon Soken Inc | Fuel feed device for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63239346A (en) | 1988-10-05 |
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