JPS6246844Y2 - - Google Patents
Info
- Publication number
- JPS6246844Y2 JPS6246844Y2 JP1982123930U JP12393082U JPS6246844Y2 JP S6246844 Y2 JPS6246844 Y2 JP S6246844Y2 JP 1982123930 U JP1982123930 U JP 1982123930U JP 12393082 U JP12393082 U JP 12393082U JP S6246844 Y2 JPS6246844 Y2 JP S6246844Y2
- Authority
- JP
- Japan
- Prior art keywords
- lpg
- gasoline
- vaporizer
- passage
- valve
- 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
Links
- 239000003502 gasoline Substances 0.000 claims description 40
- 239000006200 vaporizer Substances 0.000 claims description 25
- 241000234435 Lilium Species 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 239000012528 membrane Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- -1 For example Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】
本考案は一個の気化器でガソリンとLPGとを選
択的にエンジンに供給できるガソリン−LPG両用
気化器に関するものである。[Detailed Description of the Invention] The present invention relates to a gasoline-LPG dual-purpose carburetor that can selectively supply gasoline and LPG to an engine using a single vaporizer.
LPGはガソリンに比べて安価であることから、
例えば始動および暖機にガソリンを使用するが通
常の運転にはLPGを使用するとか、LPGを常用し
ガソリンを予備燃料として使用するなど、ガソリ
ンとLPGとを適宜切換えて選択使用が可能なガソ
リン−LPG両用気化器が用いられている。 Since LPG is cheaper than gasoline,
For example, gasoline can be used for starting and warming up, but LPG is used for normal operation, or LPG can be used regularly and gasoline can be used as a backup fuel. A dual-use LPG vaporizer is used.
一般に、ガソリン−LPG両用気化器ではガソリ
ンまたはLPGを単独で使用したときに燃料経済
性、所定の出力が得られるように設計されてい
て、これら燃料が同時に供給されると燃料が不経
済であるばかりか、混合気過濃となつて出力の低
下、排出ガス中の有害物質の増加を招く。そこ
で、ガソリンからLPGに切換えるときは、一旦両
燃料の供給を断つて浮子室などに残存しているガ
ソリンを消費してからLPGの供給を開始する、ガ
ソリン系の遮断弁を浮子室などの下流側に設置し
て切換え時のガソリン残量を最少にとどめる、な
どの手段によつて同時供給に伴う不都合をなくす
ようにしている。 In general, gasoline-LPG dual-use carburetors are designed to provide fuel economy and a specified output when gasoline or LPG is used alone, but are uneconomical when these fuels are supplied simultaneously. Not only that, the air-fuel mixture becomes too rich, resulting in a decrease in output and an increase in harmful substances in the exhaust gas. Therefore, when switching from gasoline to LPG, the supply of both fuels is cut off, the gasoline remaining in the float chamber etc. is consumed, and then the supply of LPG is started. The inconvenience associated with simultaneous supply is eliminated by installing the fuel tank at the same time and minimizing the remaining amount of gasoline at the time of switching.
これに対して、LPGからガソリンに切換えると
きは、ガソリンが浮子室などに規定量溜るまでに
ベーパライザのLPGを消費し同時供給されないの
で、一旦両燃料の供給を断つ切換スイツチ中立の
必要はないとされている。しかしながら、LPG系
の遮断弁は例えば実開昭56−97559号公報にも見
られるように耐圧容器とベーパライザとの間に設
けられて居り、それより下流側にはかなりの量の
LPGが残存しているので、浮子室などが小容量の
とき、或いはガソリン系の遮断弁が浮子室などの
下流側に設置されているときなどは切換え後短時
間でガソリンが供給されるようになり、両燃料が
同時供給されるのを避けられない。また、LPGベ
ンチユリをガソリンベンチユリと共通にした併用
方式、LPGベンチユリを気化器入口に設けたアダ
プタ方式、ガソリン気化器と吸入管との間にLPG
混合器を設けたスペーサ方式のいずれの構造の両
用気化器においても、ガソリン使用時には耐圧容
器とベーパライザとの間でLPGが遮断されるので
ベンチユリ負圧または吸入管負圧がベーパライザ
に直接作用し、ベーパライザの内部はかなり高い
負圧になる。従つて、大気圧よりも少し低い負圧
で作動するように調整されている二次弁レバーが
高負圧力によつて必要以上に動作させられ、次第
に曲げ変形して正常な開閉動作が行えなくなると
いう問題を生じることがあつた。 On the other hand, when switching from LPG to gasoline, the LPG in the vaporizer will be consumed until the specified amount of gasoline accumulates in the float chamber, etc., and the LPG will not be supplied at the same time, so there is no need to turn the switch to neutral to cut off the supply of both fuels. has been done. However, as seen in, for example, Japanese Utility Model Application Publication No. 56-97559, the LPG system shutoff valve is installed between the pressure container and the vaporizer, and there is a considerable amount of water on the downstream side.
Since LPG remains, gasoline will be supplied in a short time after switching when the float chamber has a small capacity or when a gasoline shutoff valve is installed downstream of the float chamber. Therefore, it is unavoidable that both fuels are supplied at the same time. In addition, there is a combination system in which the LPG bench lily is shared with the gasoline bench lily, an adapter system in which the LPG bench lily is installed at the carburetor inlet, and an LPG bench lily installed between the gasoline carburetor and the intake pipe.
In both spacer-type dual-use vaporizers equipped with a mixer, when gasoline is used, LPG is cut off between the pressure container and the vaporizer, so the negative pressure in the bench lily or the negative pressure in the suction pipe acts directly on the vaporizer. There is a fairly high negative pressure inside the vaporizer. Therefore, the secondary valve lever, which is adjusted to operate at a negative pressure slightly lower than atmospheric pressure, is forced to operate more than necessary due to the high negative pressure, and gradually bends and deforms, making it impossible to perform normal opening and closing operations. This sometimes caused a problem.
本考案は、ガソリン−LPG両用気化器において
LPGからガソリンに切換えたとき発生する前述の
ような諸問題を解決し、切換え時の混合気過濃を
招かないと共に二次弁レバーの不調を生じさせな
い両用気化器を提供することを目的として考案さ
れたものである。 This invention is a gasoline-LPG dual-use vaporizer.
The purpose of this invention was to solve the above-mentioned problems that occur when switching from LPG to gasoline, and to provide a dual-purpose carburetor that does not cause over-enrichment of the mixture when switching and does not cause malfunction of the secondary valve lever. It is what was done.
即ち、本考案はタンクのガソリンをガソリン気
化器から吸気路に供給するガソリン系と、耐圧容
器のLPGをベーパライザで減圧して前記吸気路に
供給するLPG系と、ガソリンとLPGとを切換える
ため前記ガソリン系とLPG系のそれぞれに設けら
れた遮断弁とを具え、LPG系の遮断弁は耐圧容器
とベーパライザとの間に設けられているガソリン
−LPG両用気化器において、前記LPG系のLPG通
路はベーパライザよりも下流側が前記吸気路入口
に設置されたエアクリーナの清浄空気側と空気通
路で接続されており、且つガソリン使用時に開く
開閉弁が前記空気通路に設けられている構成とし
たことを特徴としている。 That is, the present invention switches between a gasoline system that supplies gasoline in a tank from a gasoline vaporizer to an intake passage, an LPG system that reduces the pressure of LPG in a pressure container with a vaporizer and supplies it to the intake passage, and a system that switches between gasoline and LPG. In the gasoline-LPG dual use vaporizer, the LPG passageway of the LPG system is equipped with a cutoff valve provided for each of the gasoline system and the LPG system, and the cutoff valve for the LPG system is provided between the pressure container and the vaporizer. A downstream side of the vaporizer is connected to the clean air side of an air cleaner installed at the entrance of the intake passage through an air passage, and an on-off valve that opens when gasoline is used is provided in the air passage. There is.
以下本考案の一実施例を図面に従つて説明する
と、竪に置かれたガソリン気化器１の上にLPGベ
ンチユリ２、エアクリーナ３が順に重ねて固定さ
れ、ガソリンはタンク４から燃料ポンプ５、遮断
弁６を有するガソリン供給路７を通つてガソリン
気化器１の浮子室８に供給され、これより図示さ
れていない主ノズル、スローポートなどから吸気
路９に供給されるようになつており、これらは
LPG系を構成している。 An embodiment of the present invention will be described below with reference to the drawings. An LPG bench lily 2 and an air cleaner 3 are stacked and fixed in order on a gasoline vaporizer 1 placed vertically, and gasoline flows from a tank 4 to a fuel pump 5, which is shut off. Gasoline is supplied to the float chamber 8 of the gasoline vaporizer 1 through a gasoline supply path 7 having a valve 6, and is then supplied to an intake path 9 from a main nozzle, slow port, etc. (not shown). teeth
It constitutes an LPG system.
エアクリーナ３の内部、即ちエレメント内側の
清浄空気側とLPG通路１４の適所とを接続する空
気通路１６が設けられ、この空気通路１６には開
閉弁１７が設置されている。 An air passage 16 is provided that connects the inside of the air cleaner 3, that is, the clean air side inside the element, and a proper position of the LPG passage 14, and an on-off valve 17 is installed in this air passage 16.
前記の二つの遮断弁６，１１および開閉弁１７
は電磁力で開閉駆動されるもので、それぞれの駆
動用のソレノイド１８，１９，２０には切換スイ
ツチ２１によつて電源２２からの電流が供給さ
れ、LPG供給路１２が開いているときはガソリン
供給路７および空気通路１６が閉じられ、LPG供
給路１２が閉じるとガソリン供給路７および空気
通路１６が開かれるようになつている。 The two shutoff valves 6, 11 and the on-off valve 17
are driven to open and close by electromagnetic force, and electric current is supplied from a power supply 22 to each driving solenoid 18, 19, 20 by a changeover switch 21, and when the LPG supply path 12 is open, gasoline is supplied. The supply passage 7 and the air passage 16 are closed, and when the LPG supply passage 12 is closed, the gasoline supply passage 7 and the air passage 16 are opened.
ベーパライザ２３はLPG供給路１２を開閉する
一次弁２４を内蔵した一次室２５と、LPG通路１
４が開口した二次室２６と、一次室２５から二次
室２６に至るガス通路２７を開閉するため二次室
２６に内蔵した二次弁２８と、二次室２６と膜２
９によつて仕切られた負圧室３０を有するロツク
機構３１とを具えている。二次室２６と大気室３
２とを仕切つた膜３３に二次弁２８を取付けた二
次弁レバー３４が係合させてあり、二次室２６の
ガス圧力が負圧になると膜３３が二次室２６の方
へ移動して二次弁２８を開弁させ、一次室２５の
LPGを二次室２６に導入しLPG通路１４から噴口
１５へ送るもので、二次室２６においてLPGは二
次弁レバー３４に作用させたばね３５の弾力に応
じた圧力に減圧される。ロツク機構３１の負圧室
３０はエンジンの吸入管負圧が導入されるもの
で、エンジン停止時はばね３６の弾力で膜２９が
二次弁レバー３４を押し二次弁２８を強制的に閉
弁させているが、エンジンが始動して吸入管負圧
が発生すると膜２９が負圧室３０の方へ移動し二
次弁２８を開弁可能な状態とするのである。 The vaporizer 23 has a primary chamber 25 containing a primary valve 24 that opens and closes the LPG supply path 12, and an LPG path 1.
4 is opened, a secondary valve 28 built in the secondary chamber 26 for opening and closing the gas passage 27 leading from the primary chamber 25 to the secondary chamber 26, and the secondary chamber 26 and the membrane 2.
A locking mechanism 31 having a negative pressure chamber 30 partitioned by 9 is provided. Secondary chamber 26 and atmospheric chamber 3
A secondary valve lever 34 to which a secondary valve 28 is attached is engaged with a membrane 33 that partitions the secondary chamber 2, and when the gas pressure in the secondary chamber 26 becomes negative, the membrane 33 moves toward the secondary chamber 26. to open the secondary valve 28 and open the primary chamber 25.
LPG is introduced into the secondary chamber 26 and sent from the LPG passage 14 to the nozzle 15. In the secondary chamber 26, the LPG is reduced to a pressure corresponding to the elasticity of the spring 35 acting on the secondary valve lever 34. The negative pressure chamber 30 of the lock mechanism 31 is introduced with negative pressure from the engine's suction pipe, and when the engine is stopped, the membrane 29 pushes the secondary valve lever 34 with the elasticity of the spring 36 and forcibly closes the secondary valve 28. However, when the engine is started and negative pressure is generated in the suction pipe, the membrane 29 moves toward the negative pressure chamber 30, making the secondary valve 28 ready to open.
尚、空気通路１６は図示実施例では主調整弁１
３の上流側においてLPG通路１４に接続されてい
るが、下流側であつてもよいことは勿論であり、
また本考案は図示実施例のアダプタ方式のものに
限らず、併用方式およびスペーサ方式の構造のも
のにも適用されることは言うまでもない。 Note that the air passage 16 is connected to the main regulating valve 1 in the illustrated embodiment.
Although it is connected to the LPG passage 14 on the upstream side of 3, it is of course possible to connect it to the downstream side.
It goes without saying that the present invention is not limited to the adapter type shown in the illustrated embodiment, but can also be applied to combination type and spacer type structures.
以上のように本考案によると、LPGをガソリン
に切換えたときベンチユリ負圧や吸入管負圧の影
響の少ないエアクリーナ内部をLPG通路と連通さ
せるようにしたので、ほぼ大気圧の清浄な空気が
ベーパライザの二次室から吸気路へ開口した噴口
へ至るLPG通路に導入されるのである。従つて、
LPG系の遮断弁よりも下流側に残存しているLPG
は空気と混合して噴口から吸気路へ供給されるこ
ととなり、切換え後短時間でガソリンが供給され
るようになつても混合気を過濃とすることがな
く、同時供給に伴う出力低下、排出ガス中の有害
物質の増加という不都合が軽減乃至解消されるの
である。また、LPG通路に導入される空気はベー
パライザに高い負圧が作用するのを防止するの
で、大気圧よりも少し低い負圧で作動するように
調整されている二次弁レバーを高負圧力で必要以
上に動作させて次第に曲げ変形させるという問題
がなくなり、常に正常な開閉動作を行わせること
ができるものである。 As described above, according to the present invention, when switching from LPG to gasoline, the inside of the air cleaner, which is less affected by bench lily negative pressure and suction pipe negative pressure, is communicated with the LPG passage, so clean air at almost atmospheric pressure is delivered to the vaporizer. The LPG is introduced into the LPG passage leading from the secondary chamber to the nozzle opening into the intake passage. Therefore,
LPG remaining downstream of the LPG system shutoff valve
is mixed with air and supplied from the nozzle to the intake passage, so even if gasoline is supplied in a short time after switching, the mixture will not become too rich, and the output will decrease due to simultaneous supply. The inconvenience of an increase in harmful substances in exhaust gas is reduced or eliminated. In addition, the air introduced into the LPG passage prevents high negative pressure from acting on the vaporizer, so the secondary valve lever, which is adjusted to operate at a negative pressure slightly lower than atmospheric pressure, can be operated at a high negative pressure. This eliminates the problem of gradual bending and deformation due to excessive operation, and allows normal opening and closing operations to be performed at all times.
図面は本案の実施例を示す一部切截した正面図
である。
１……ガソリン気化器、２……LPGベンチユ
リ、３……エアクリーナ、６……遮断弁、７……
ガソリン供給路、９……吸気路、１１……遮断
弁、１２……LPG供給路、１３……主調整弁、１
４……LPG通路、１５……噴口、１６……空気通
路、１７……開閉弁、２１……切換スイツチ、２
３……ベーパライザ、２６……二次室。
The drawing is a partially cutaway front view showing an embodiment of the present invention. 1...Gasoline vaporizer, 2...LPG bench lily, 3...Air cleaner, 6...Shutoff valve, 7...
Gasoline supply path, 9...Intake path, 11...Shutoff valve, 12...LPG supply path, 13...Main adjustment valve, 1
4... LPG passage, 15... Nozzle, 16... Air passage, 17... Opening/closing valve, 21... Selector switch, 2
3...vaporizer, 26...secondary chamber.
Claims (1)
気路９に供給するガソリン系と、耐圧容器１０の
LPGをベーパライザ２３で減圧して前記吸気路９
に供給するLPG系と、ガソリンとLPGとを切換え
るため前記ガソリン系とLPG系のそれぞれに設け
られた遮断弁６，１１とを具え、LPG系の遮断弁
１１は耐圧容器１０とベーパライザ２３との間に
設けられているガソリン−LPG両用気化器におい
て、前記LPG系のLPG通路１４はベーパライザ２
３よりも下流側が前記吸気路９入口に設置された
エアクリーナ３の清浄空気側と空気通路１６で接
続されており、且つガソリン使用時に開く開閉弁
１７が前記空気通路１６に設けられていることを
特徴とするガソリン−LPG両気化器。 A gasoline system that supplies gasoline from a tank 4 from a gasoline vaporizer 1 to an intake passage 9 and a pressure vessel 10.
The LPG is depressurized by the vaporizer 23 and the intake passage 9 is
and cutoff valves 6 and 11 provided respectively for the gasoline system and the LPG system for switching between gasoline and LPG, and the cutoff valve 11 for the LPG system is provided for switching between the pressure vessel 10 and the vaporizer 23. In the gasoline-LPG dual-purpose vaporizer provided in between, the LPG passage 14 of the LPG system is connected to the vaporizer 2.
3 is connected by an air passage 16 to the clean air side of the air cleaner 3 installed at the entrance of the intake passage 9, and the air passage 16 is provided with an on-off valve 17 that opens when gasoline is used. Features both gasoline and LPG carburetor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12393082U JPS5928655U (en) | 1982-08-16 | 1982-08-16 | Gasoline-LPG dual use vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12393082U JPS5928655U (en) | 1982-08-16 | 1982-08-16 | Gasoline-LPG dual use vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5928655U JPS5928655U (en) | 1984-02-22 |
| JPS6246844Y2 true JPS6246844Y2 (en) | 1987-12-21 |
Family
ID=30282703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12393082U Granted JPS5928655U (en) | 1982-08-16 | 1982-08-16 | Gasoline-LPG dual use vaporizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5928655U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531230U (en) * | 1978-08-23 | 1980-02-28 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117240Y2 (en) * | 1980-02-01 | 1986-05-27 |
-
1982
- 1982-08-16 JP JP12393082U patent/JPS5928655U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531230U (en) * | 1978-08-23 | 1980-02-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5928655U (en) | 1984-02-22 |
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