JPS6243065B2 - - Google Patents
Info
- Publication number
- JPS6243065B2 JPS6243065B2 JP9065179A JP9065179A JPS6243065B2 JP S6243065 B2 JPS6243065 B2 JP S6243065B2 JP 9065179 A JP9065179 A JP 9065179A JP 9065179 A JP9065179 A JP 9065179A JP S6243065 B2 JPS6243065 B2 JP S6243065B2
- Authority
- JP
- Japan
- Prior art keywords
- lpg
- bench lily
- gasoline
- lily
- float chamber
- 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
- 241000234435 Lilium Species 0.000 claims description 40
- 238000009423 ventilation Methods 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 239000006200 vaporizer Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【発明の詳細な説明】
本発明は一個の気化器でガソリンおよびLPGを
エンジンに供給できる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 dual-use carburetor that can supply gasoline and LPG to an engine using a single carburetor.
LPGはガソリンに比べ安価であるので豊富に入
手できる地域では自動車エンジンの燃料にLPGを
使用することがあり、ガソリンはLPGを消費しつ
くしたとき補給場所まで走行する代替燃料として
使用される。また近年省エネルギが社会的問題と
なつて居り石油資源節約の点からガソリンにLPG
を併用する必要性の生じることが予想される。前
者の場合は国外において既に実施されていて、通
常のガソリン気化器のチヨーク弁を具えたエアホ
ーンをLPGベンチユリと交換することによつて構
成した気化器を用い、ガソリンタンク、燃料ポン
プから浮子室へ至るガソリン通路に弁を設け、通
常は閉じておいてLPGを使用し必要時に開いてガ
ソリンを供給するようになつている。 LPG is cheaper than gasoline, so in areas where it is available in abundance, LPG is sometimes used as fuel for car engines, and gasoline is used as an alternative fuel to drive vehicles to refueling locations when LPG is used up. In addition, energy saving has become a social issue in recent years, and from the perspective of saving oil resources, gasoline is being replaced with LPG.
It is expected that there will be a need to use them together. The former case has already been implemented overseas, and uses a carburetor constructed by replacing the air horn with a chioke valve of a normal gasoline carburetor with an LPG bench lily, and connects it from the gasoline tank and fuel pump to the float chamber. A valve is installed in the gasoline passage leading to the engine, which is normally closed to use LPG and opened when necessary to supply gasoline.
ところで、LPGベンチユリとガソリンベンチユ
リとを上流から下流へ直列に配置した両用気化器
において浮子室に内部通気方式を採用した場合、
通気口の場所によつて空燃比およびトルクに問題
を生じる。即ち、通気口がLPGベンチユリの下流
側へ開口している場合、LPGベンチユリが空気抵
抗となつてエンジン回転速度の増加に伴い浮子室
内の負圧を高めてガソリン油面と主ノズルとの圧
力差に不均衡を生じガソリン吸い出し量を減少さ
せ全負荷性能試験の結果第４図B1のように燃料
消費量が要求値以下となつて空燃比が薄くなりそ
のためトルクも同図B2のように不安定となるこ
とが判つた。また通気口をLPGベンチユリの上流
側に開口した場合は前記の静圧形通気口に対し動
圧形通気口を形成していてLPGベンチユリの影響
を受けることなく浮子室内に負圧を発生させるが
燃料消費量の増加割合は第４図C1のようにかな
り大きく、空燃比がかなり濃くなつてトルクは同
図C2のように低いことが判明した。 By the way, if an internal ventilation method is adopted for the float chamber in a dual-use carburetor in which an LPG bench lily and a gasoline bench lily are arranged in series from upstream to downstream,
Vent location creates problems with air/fuel ratio and torque. In other words, if the vent opens downstream of the LPG vent lily, the LPG vent lily acts as air resistance, increasing the negative pressure in the float chamber as the engine speed increases, and increasing the pressure difference between the gasoline oil level and the main nozzle. As a result of the full load performance test, the fuel consumption fell below the required value as shown in Figure 4 B1 , and the air-fuel ratio became leaner, resulting in a torque change as shown in Figure 4 B2. It turned out to be unstable. In addition, if the vent is opened upstream of the LPG bench lily, it forms a dynamic pressure vent in contrast to the static pressure vent described above, and negative pressure is generated in the float chamber without being affected by the LPG vent lily. It was found that the rate of increase in fuel consumption was quite large as shown in Figure 4 C 1 , the air-fuel ratio became quite rich and the torque was low as shown in Figure 4 C 2 .
本発明は浮子室をLPGベンチユリの上流側と下
流側の両方において気化器内部に連通させたこと
により前述の問題点を解決し、且つ部品を交換す
ることなくそのままガソリンとLPGの切換え使用
ができるようにしたものである。 The present invention solves the above-mentioned problems by communicating the float chamber with the inside of the carburetor on both the upstream and downstream sides of the LPG bench lily, and allows switching between gasoline and LPG without replacing any parts. This is how it was done.
即ち、本発明に係るガソリン−LPG両用気化器
は、エンジンへ吸い込まれる空気流れの上流から
下流へ向かつてLPGベンチユリ、チヨーク弁を有
するエアホーン、ガソリンベンチユリおよび浮子
室を有する本体が前記の順に配置されているとと
もに、前記LPGベンチユリおよびエアホーンに設
けた通路からなる通気路が前記浮子室に連通して
おり、前記通気路は前記LPGベンチユリの上流側
に開口した通気口および前記LPGベンチユリとエ
アホーンとの接合面に形成した空隙に設けられた
通気口によつて前記浮子室を気化器内部と連通さ
せていることを特徴としている。 That is, the gasoline-LPG dual use carburetor according to the present invention has an LPG bench lily, an air horn having a choke valve, a gasoline vent lily, and a main body having a float chamber arranged in the above order from upstream to downstream of the air flow sucked into the engine. In addition, a ventilation path consisting of a passage provided in the LPG bench lily and the air horn communicates with the float chamber, and the ventilation path is connected to a ventilation hole opened on the upstream side of the LPG bench lily and the passage provided in the LPG bench lily and the air horn. It is characterized in that the float chamber is communicated with the inside of the carburetor through a vent provided in a gap formed in a joint surface of the float chamber.
以下本発明の実施例を図面に就いて説明する
と、第１図において１は主ノズル２を有するガソ
リンベンチユリ３と浮子室４および図示しない燃
料通路、ブリード空気口等とを具えた本体、５は
絞り弁６および図示しないスローポート等を具え
たフランジ、７はチヨーク弁８を具えたエアホー
ン、９は噴口１０を有するLPGベンチユリであつ
て、エンジンへ吸い込まれる空気流れの上流から
下流へ向かつてLPGベンチユリ９、エアホーン
７、本体１、フランジ５の順に下向きに組み付け
られ、LPGベンチユリ９にエアクリーナ１１が装
着されている。 Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a main body comprising a gasoline bench lily 3 having a main nozzle 2, a float chamber 4, a fuel passage, a bleed air port, etc. (not shown); 7 is a flange equipped with a throttle valve 6 and a slow port (not shown), 7 is an air horn equipped with a choke valve 8, and 9 is an LPG bench lily having a nozzle 10, which directs the air flow sucked into the engine from upstream to downstream. An LPG bench lily 9, an air horn 7, a main body 1, and a flange 5 are assembled in downward order, and an air cleaner 11 is attached to the LPG bench lily 9.
ガソリンは図示しないガソリンタンクから燃料
ポンプを有する燃料通路を通り浮子弁を経て浮子
室４へ供給されるが、LPGを使用しているときは
燃料通路に設けた弁を閉じておく。LPGは図示し
ない圧力容器からベーパライザを経てLPGベンチ
ユリ９へ供給される。 Gasoline is supplied from a gasoline tank (not shown) through a fuel passage having a fuel pump to the float chamber 4 via a float valve, but when LPG is used, the valve provided in the fuel passage is closed. LPG is supplied from a pressure vessel (not shown) to the LPG bench lily 9 via a vaporizer.
LPGベンチユリ９はそのベンチユリ部の上流側
に開口した絞り１２によつて形成される通気口１
３を有する通路１４を具え、エアホーン７および
本体１は浮子室４の上部に連通した通路１５を具
え、これら通路１４，１５はエアホーン７とLPG
ベンチユリ９との接合面に形成した空隙を隔てて
同一中心線上に対向して通気路１６を構成し、前
記空隙をLPGベンチユリ９のベンチユリ部の下流
側に開口した通気口１７としたものであつて、間
隙を適当な大きさとすることによつて通気口１７
に絞り効果をもたせる。 The LPG bench lily 9 has a vent 1 formed by a throttle 12 opened on the upstream side of the bench lily.
The air horn 7 and the main body 1 are provided with a passage 15 communicating with the upper part of the float chamber 4, and these passages 14, 15 are connected to the air horn 7 and the LPG.
A ventilation passage 16 is configured to face each other on the same center line across a gap formed on the joint surface with the bench lily 9, and the gap is used as a ventilation port 17 opening on the downstream side of the bench lily portion of the LPG bench lily 9. By making the gap an appropriate size, the ventilation hole 17
Gives an aperture effect.
第２図の実施例はLPGベンチユリ９の通路１４
に補助管路１８を嵌装突出させてこれをエアホー
ン７の通路１５へ緩く挿入しそれらの間隙によつ
て下流側の通気口１７を形成したものである。ま
た第３図の実施例は二つの通路１４，１５の接続
部に連結管１９を密に嵌装し、LPGベンチユリ９
とエアホーン７との空隙へ向かつて開口する通気
口１７を連結管１９に設けたものである。 The embodiment shown in FIG. 2 is the passage 14 of the LPG bench lily 9.
An auxiliary conduit 18 is fitted and protruded into the air horn 7, and the auxiliary conduit 18 is loosely inserted into the passage 15 of the air horn 7, and a downstream vent 17 is formed by the gap therebetween. Furthermore, in the embodiment shown in FIG.
A vent hole 17 is provided in the connecting pipe 19 and opens toward the gap between the air horn 7 and the air horn 7.
以上のように構成した本発明によると、LPGを
使用するときはLPGベンチユリ９の噴口１０から
吸い出され空気と混合して従来の混合器と全く同
じ機能を発揮するものである。そしてガソリンを
使用するときは例えばLPGベンチユリ９を本体１
から外しエアホーンを装着する等部品を交換する
ことなくそのまま切り換えてエンジンを運転でき
るもので、その際にLPGベンチユリ９が空気抵抗
となつてその上流と下流とに差圧を発生しても、
内部通気方式によつて浮子室４と気化器内部とを
連通した通気路１６がLPGベンチユリ９の上流と
下流の両方に開口させてあるため浮子室４にはこ
れらの中間の圧力が作用することとなるのであ
る。従つて、各通気口１３，１７の大きさまたは
通気路１６の通路径を適当に選定することによつ
てガソリン油面と主ノズル２との圧力差をエンジ
ン回転速度に応じて適正に維持し、第４図A1で
示した範囲内に燃料消費量をおさえ適正空燃比の
混合気をエンジンに供給して同図A2のように安
定したトルクを与えることができるのである。 According to the present invention configured as described above, when LPG is used, it is sucked out from the nozzle 10 of the LPG bench lily 9 and mixed with air to perform exactly the same function as a conventional mixer. When using gasoline, for example, use LPG bench lily 9 as main body 1.
The engine can be operated by simply changing the engine without replacing parts such as removing the air horn and installing an air horn, and even if the LPG bench lily 9 becomes air resistance and generates a differential pressure between its upstream and downstream sides,
Since the air passage 16 that communicates the float chamber 4 and the inside of the vaporizer with the internal ventilation method is opened both upstream and downstream of the LPG bench lily 9, an intermediate pressure between these two acts on the float chamber 4. It becomes. Therefore, by appropriately selecting the size of each vent 13, 17 or the passage diameter of the vent passage 16, the pressure difference between the gasoline oil level and the main nozzle 2 can be maintained appropriately depending on the engine rotation speed. , it is possible to suppress fuel consumption within the range shown by A 1 in FIG. 4, supply a mixture with an appropriate air-fuel ratio to the engine, and provide stable torque as shown in A 2 in the same figure.
またLPGベンチユリ９の下流側の通気口１７は
LPGベンチユリ９とエアホーン７との接合面にお
いて通気路１６を構成する二つの通路１４，１５
の接続部に空隙を設けこの空隙に形成したもので
あるから、LPGベンチユリ９またはエアホーン７
にこの通気口１７を通気路１６から分岐形成する
必要がなくなり通気路１６の構造を簡単化できる
ばかりか、LPGベンチユリ９を取り外してそのま
ま内部通気方式のガソリン専用気化器として使用
できるものである。更に本発明によるとチヨーク
弁８を有するガソリン気化器の入口にLPGベンチ
ユリ９を設けた構造となつているので、LPGを消
費しつくした後にガソリンに切り換える他に、寒
冷時にチヨーク弁８を閉じエンジンをガソリンに
より始動して暖機後にLPGへ切り換え、或いは高
出力時にLPGとガソリンの両方を併用し高濃度の
出力混合気を作る等さまざまな用法で使用してガ
ソリンの節約を計るばかりかその安定した供給を
計ることができるものである。 Also, the vent 17 on the downstream side of the LPG bench lily 9 is
Two passages 14 and 15 forming a ventilation passage 16 at the joint surface between the LPG bench lily 9 and the air horn 7
Since a gap is provided at the connection part of the LPG bench lily 9 or air horn 7.
There is no need to form this vent 17 branching from the ventilation passage 16, and the structure of the ventilation passage 16 can be simplified, and the LPG bench lily 9 can be removed and used as an internal ventilation type gasoline-only vaporizer. Furthermore, according to the present invention, the structure is such that an LPG bench lily 9 is provided at the inlet of a gasoline vaporizer having a chiyoke valve 8, so that in addition to switching to gasoline after the LPG is completely consumed, the chiyoke valve 8 is closed in cold weather to stop the engine from running. The engine can be used in a variety of ways, such as starting with gasoline and switching to LPG after warming up, or using both LPG and gasoline together at high output to create a highly concentrated output mixture, which not only saves gasoline but also improves its stability. It is possible to measure the supply of
第１図は本発明の実施例を示す縦断面図、第２
図、第３図はそれぞれ異なる実施例を示す縦断面
部分図、第４図は特性曲線図である。
１…本体、３…ガソリンベンチユリ、４…浮子
室、５…フランジ、７…エアホーン、８…チヨー
ク弁、９…LPGベンチユリ、１３…通気口、１
４，１５…通路、１６…通気路、１７…通気口。
Fig. 1 is a vertical sectional view showing an embodiment of the present invention, Fig. 2
3 and 3 are vertical cross-sectional partial views showing different embodiments, respectively, and FIG. 4 is a characteristic curve diagram. 1...Main body, 3...Gasoline bench lily, 4...Float chamber, 5...Flange, 7...Air horn, 8...Chiyoke valve, 9...LPG bench lily, 13...Vent, 1
4, 15... Passage, 16... Ventilation path, 17... Vent.
Claims (1)
下流へ向かつてLPGベンチユリ９、チヨーク弁８
を有するエアホーン７、ガソリンベンチユリ３お
よび浮子室４を有する本体１が前記の順に配置さ
れているとともに、前記LPGベンチユリ９および
エアホーン７に設けた通路１４，１５からなる通
気路１６が前記浮子室４に連通しており、前記通
気路１６は前記LPGベンチユリ９の上流側に開口
した通気口１３および前記LPGベンチユリ９とエ
アホーン７との接合面に形成した空隙に設けられ
た通気口１７によつて前記浮子室４を気化器内部
と連通させていることを特徴とするガソリン−
LPG両用気化器。1 From upstream to downstream of the air flow sucked into the engine, LPG bench lily 9 and chiyoke valve 8
The main body 1 having an air horn 7, a gasoline bench lily 3, and a float chamber 4 are arranged in the above order, and a ventilation path 16 consisting of passages 14 and 15 provided in the LPG bench lily 9 and air horn 7 is connected to the float chamber. 4, and the ventilation path 16 is connected to a ventilation port 13 opened on the upstream side of the LPG bench lily 9 and a ventilation port 17 provided in a gap formed at the joint surface of the LPG bench lily 9 and the air horn 7. Gasoline characterized in that the float chamber 4 is communicated with the inside of the carburetor.
LPG dual-use vaporizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9065179A JPS5614845A (en) | 1979-07-17 | 1979-07-17 | Carburetor capable of using gasoline or lpg selectively |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9065179A JPS5614845A (en) | 1979-07-17 | 1979-07-17 | Carburetor capable of using gasoline or lpg selectively |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5614845A JPS5614845A (en) | 1981-02-13 |
| JPS6243065B2 true JPS6243065B2 (en) | 1987-09-11 |
Family
ID=14004411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9065179A Granted JPS5614845A (en) | 1979-07-17 | 1979-07-17 | Carburetor capable of using gasoline or lpg selectively |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5614845A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039473Y2 (en) * | 1980-02-19 | 1985-11-26 | トヨタ自動車株式会社 | Air-fuel ratio correction device for a carburetor that uses both gasoline and LPG |
-
1979
- 1979-07-17 JP JP9065179A patent/JPS5614845A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5614845A (en) | 1981-02-13 |
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