JPS6123640Y2 - - Google Patents
Info
- Publication number
- JPS6123640Y2 JPS6123640Y2 JP1981145730U JP14573081U JPS6123640Y2 JP S6123640 Y2 JPS6123640 Y2 JP S6123640Y2 JP 1981145730 U JP1981145730 U JP 1981145730U JP 14573081 U JP14573081 U JP 14573081U JP S6123640 Y2 JPS6123640 Y2 JP S6123640Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- ventilate
- intake
- mixer
- mixing 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
- 239000000446 fuel Substances 0.000 claims description 27
- 238000009423 ventilation Methods 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 241000234435 Lilium Species 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
Landscapes
- Toys (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】
本考案は、都市ガスやプロパンガス等を燃料と
するガス燃料エンジンのガス燃料−空気混合器に
関し、負荷変動に伴つて空燃混合比が変動するこ
とを防止することを目的とする。[Detailed description of the invention] The present invention relates to a gas fuel-air mixer for a gas-fueled engine that uses city gas, propane gas, etc. as fuel, and is intended to prevent the air-fuel mixture ratio from changing due to load fluctuations. With the goal.
従来の混合器では、エンジンの負荷が小さくな
るほど、混合器の吸入量が１次関数で減るのに対
し、混合器のベンチユリーの負圧が２次関数で減
つて、燃料ガスの吸出し量も２次関数で減るため
空燃混合比が希薄になりすぎ燃焼不良を起す問題
があつた。 In a conventional mixer, as the engine load decreases, the intake amount of the mixer decreases as a linear function, whereas the negative pressure of the mixer's ventilate decreases as a quadratic function, and the amount of fuel gas sucked out also decreases by 2. There was a problem that the air-fuel mixture ratio became too lean and caused poor combustion because it decreased according to the following function.
本考案は、この問題を解決するために、導気管
で案内して直進性を持たせた吸入空気を混合室の
入口に設けた吸気絞り孔で絞ることにより、ベン
チユリーの静負圧を増加させるとともに、吸気絞
り孔で流速を高められた吸入空気の多くをベンチ
ユリーの中央部に集束して通過させて、ベンチユ
リーの中央部に開口する燃料ノズルの周囲に吸引
力を発生させ、軽負荷時において燃料ノズルの出
口から燃料を多量に吸出させて、空燃混合比がそ
れほど希薄にならないようにするものである。 In order to solve this problem, the present invention increases the static negative pressure of the ventilate by squeezing the intake air that has been guided through the air guide pipe to give it straightness through the intake throttle hole provided at the entrance of the mixing chamber. At the same time, much of the intake air whose flow velocity has been increased through the intake throttle hole is concentrated in the center of the ventilate and passed through, generating suction force around the fuel nozzle that opens in the center of the ventilate, which increases the flow rate during light loads. A large amount of fuel is sucked out from the outlet of the fuel nozzle to prevent the air-fuel mixture ratio from becoming too lean.
以下、本考案の実施例を図面に基き説明する。
第１図は、ガス燃料エンジンに使用される混合器
の縦断正面図を示す。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a longitudinal front view of a mixer used in a gas-fueled engine.
この混合器１は、エンジン（図示略）に固定さ
れた吸気管２の上部に載置固定され、混合器１の
上方にはエアクリーナ３が固定される。 This mixer 1 is mounted and fixed on the upper part of an intake pipe 2 fixed to an engine (not shown), and an air cleaner 3 is fixed above the mixer 1.
混合器１は混合器本体４とその上部に固着され
た導気筒５とからなり、混合気本体４内にはベン
チユリー６で形成された混合室Ｍを設けてある。 The mixer 1 consists of a mixer main body 4 and a guide cylinder 5 fixed to the upper part of the mixer main body 4, and a mixing chamber M formed by a ventilate 6 is provided in the mixture main body 4.
ベンチユリー６にはその横外方から燃料ノズル
７が挿入固定してあり、燃料ノズル７の先端の燃
料出口７ａは、ベンチユリー６の中央部近傍に位
置する。 A fuel nozzle 7 is inserted and fixed into the vent turret 6 from the outside laterally, and a fuel outlet 7a at the tip of the fuel nozzle 7 is located near the center of the vent turret 6.
燃料ノズル７の入口７ｂは、流動調節器８及び
圧力調整器９を介して都市ガスやプロパンガス等
の燃料ガス供給源１０に連結されており、ベンチ
ユリー６の負圧で燃料ガス供給源１０のガス燃料
を燃料ノズル７から混合室Ｍに吸い出して、空気
と混合するようになつている。 The inlet 7b of the fuel nozzle 7 is connected to a fuel gas supply source 10 such as city gas or propane gas via a flow regulator 8 and a pressure regulator 9. Gas fuel is sucked out from the fuel nozzle 7 into a mixing chamber M and mixed with air.
そして、混合気本体４と混合室Ｍの入口１１に
取付けられる導気筒５との間は通気絞り板１２が
着脱自在に設けてある。この通気絞り板１２は第
１図及び第２図に示すように、中央部に円形の吸
気絞り孔１３が明けてある。 A ventilation throttle plate 12 is removably provided between the air-fuel mixture body 4 and the guide cylinder 5 attached to the inlet 11 of the mixing chamber M. As shown in FIGS. 1 and 2, this ventilation throttle plate 12 has a circular intake throttle hole 13 in the center thereof.
この吸気絞り孔１３は、混合室Ｍのベンチユリ
ー６と同心状に、その径D1は、ベンチユリー６
の径D2よりも小さく形成してある。 This intake throttle hole 13 is concentric with the ventilate 6 of the mixing chamber M, and its diameter D 1 is
The diameter is smaller than the diameter D2 of the
このように形成した通気絞り板１２を混合器１
に装着すると、吸入空気が吸気絞り孔１３を通過
する際に、吸入空気の一部が周壁側に拡散して乱
流となり、この乱流により吸入空気の流れが邪魔
されてベンチユリー６に静負圧が生じる。 The ventilation throttle plate 12 formed in this way is attached to the mixer 1.
When the intake air passes through the intake throttle hole 13, a portion of the intake air diffuses toward the surrounding wall and becomes a turbulent flow. Pressure is created.
しかも、吸気絞り孔１３をベンチユリー６と同
心状にし、かつ、ベンチユリー６の径より小径に
したため、第１図矢印Ａで示すように、吸入空気
の多くは吸気絞り孔１３から高速度でベンチユリ
ー６の中央部に集速しながら流れることになり、
この高速度で通過する吸入空気により吸引力が発
生して、エンジンが低速回転で吸気量が少なくな
つても、その中に臨む燃料ノズル７の出口７ａか
ら燃料ガスを良好に吸い出し、空一燃比が一定に
保てるようになる。 Furthermore, since the intake throttle hole 13 is made concentric with the ventilate 6 and has a smaller diameter than the diameter of the ventilator 6, most of the intake air flows from the intake throttle hole 13 at high speed to the ventilator 6, as shown by arrow A in FIG. It flows while concentrating in the center of the
This intake air passing at high speed generates a suction force, and even if the engine rotates at low speed and the amount of intake air is small, the fuel gas can be sucked out well from the outlet 7a of the fuel nozzle 7 facing therein, and the air-fuel ratio can be kept constant.
本考案は以上述べたように構成され、作用する
ので、次の効果を奏する。 Since the present invention is constructed and operates as described above, it has the following effects.
(イ) 混合室に形成したベンチユリーの中央近傍部
に燃料ノズルの出口を位置させ、混合室の入口
に設けた通気絞り板の吸気絞り孔をベンチユリ
ーと同心状にするとともに、その径をベンチユ
リーの径よりも小さくしたので、吸気絞り孔を
通過する吸入空気により発生した乱流でベンチ
ユリーに静負圧を生じさせることができるだけ
でなく、導気筒の案内で直進性を与えられた吸
入空気の多くを吸気絞り孔で十分に高速にして
燃料ノズルの出口の周囲を通過させ、この吸入
空気の流れにより大きな吸引力を発生させるこ
とができるので、エンジンの負荷が軽くなつ
て、混合器の吸入量が少なくなつた場合におい
ても、燃料ノズルの出口から多くの燃料を吸出
すことができる。このため、空燃混合比が希薄
になりすぎることがなくなり、高負荷から低負
荷までの全負荷域にわたり空燃混合比を適正に
保つて、燃焼性能を高く維持できる。(a) The outlet of the fuel nozzle is located near the center of the ventilate formed in the mixing chamber, and the intake throttle hole of the ventilation throttle plate provided at the entrance of the mixing chamber is made concentric with the ventilate, and its diameter is Because it is smaller than the diameter, not only can the turbulent flow generated by the intake air passing through the intake throttle hole create static negative pressure in the ventilate, but also the intake air can be guided by the guide cylinder to make it move straighter. The intake air flow is made sufficiently fast through the intake throttle hole to pass around the outlet of the fuel nozzle, and this intake air flow can generate a large suction force, which reduces the load on the engine and increases the intake amount of the mixer. Even when the amount of fuel decreases, a large amount of fuel can be sucked out from the outlet of the fuel nozzle. Therefore, the air-fuel mixture ratio does not become too lean, and the air-fuel mixture ratio can be kept appropriate over the entire load range from high load to low load, and high combustion performance can be maintained.
(ロ) 加えて、上記効果を奏するための構造は、混
合室の入口と導気筒との間に通気絞り板を着脱
自在に挟んだだけの簡単な構造で済み、容易に
安価に実施することができる。(b) In addition, the structure for producing the above effect is simple, consisting of a removable ventilation throttle plate sandwiched between the inlet of the mixing chamber and the guide pipe, and can be implemented easily and inexpensively. Can be done.
その上、吸気絞り孔の大きさが異なる通気絞
り板を各種用意しておく場合には、通気絞り板
を取替えるだけで、排気ガスの容量の異なるエ
ンジンに使用される混合器、高回転数又は低回
転数用のエンジンに使用される混合器等既存の
各種混合器に簡単に安価に実施することができ
る。 In addition, if you prepare various ventilation throttle plates with different sizes of intake throttle holes, you can simply replace the ventilation throttle plates to accommodate mixers, high rotation speeds, or engines with different exhaust gas capacities. It can be easily and inexpensively implemented in various existing mixers such as mixers used in low-speed engines.
図面は本考案の実施例を示し、第１図は混合器
の縦断正面図、第２図は第１図−線断面図で
ある。
Ｍ……混合室、１……混合器、５……導気筒、
６……ベンチユリー、７……燃料ノズル、７ａ…
…７の出口、１１……Ｍの入口、１２……通気絞
り板。
The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a mixer, and FIG. 2 is a sectional view taken along the line of FIG. 1. M...mixing chamber, 1...mixer, 5...guiding cylinder,
6... Bench lily, 7... Fuel nozzle, 7a...
...7 outlet, 11...M inlet, 12...ventilation restrictor plate.
Claims (1)
１の混合室Ｍにベンチユリー６を形成し、燃焼ノ
ズル７の出口７ａをベンチユリー６の中央近傍部
に位置させ、円形の吸気絞り孔１３を明けた通気
絞り板１２を混合室Ｍの入口１１に着脱自在に挟
んで導気筒５を接続し、上記吸気絞り孔１３をベ
ンチユリー６と同心状にし、かつ、吸気絞り孔１
３の径Ｄ１をベンチユリー６の径Ｄ２よりも小さ
くしたことを特徴とするガス燃料エンジンのガス
燃料−空気混合器。 A ventilator 6 is formed in a mixing chamber M of a gas fuel and air mixer 1 of a gas fuel engine, an outlet 7a of a combustion nozzle 7 is located near the center of the ventilator 6, and a circular intake throttle hole 13 is formed. The ventilation throttle plate 12 is removably sandwiched between the inlet 11 of the mixing chamber M and the guide pipe 5 is connected to the intake throttle hole 13 so that the intake throttle hole 13 is concentric with the vent lily 6.
A gas fuel-air mixer for a gas fuel engine, characterized in that a diameter D1 of the ventilate 6 is smaller than a diameter D2 of the ventilate 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14573081U JPS5848968U (en) | 1981-09-29 | 1981-09-29 | Gas fuel-air mixer for gas fuel engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14573081U JPS5848968U (en) | 1981-09-29 | 1981-09-29 | Gas fuel-air mixer for gas fuel engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5848968U JPS5848968U (en) | 1983-04-02 |
| JPS6123640Y2 true JPS6123640Y2 (en) | 1986-07-15 |
Family
ID=29938648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14573081U Granted JPS5848968U (en) | 1981-09-29 | 1981-09-29 | Gas fuel-air mixer for gas fuel engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5848968U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100394856B1 (en) * | 2000-12-18 | 2003-08-19 | 현대자동차주식회사 | Gas mixer |
| KR20040017643A (en) * | 2002-08-23 | 2004-02-27 | 염병준 | Device for mixing fuel of a LPG car |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233733A (en) * | 1975-09-10 | 1977-03-15 | Ricoh Co Ltd | Process and device for detecting a dispersion phase density |
-
1981
- 1981-09-29 JP JP14573081U patent/JPS5848968U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233733A (en) * | 1975-09-10 | 1977-03-15 | Ricoh Co Ltd | Process and device for detecting a dispersion phase density |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5848968U (en) | 1983-04-02 |
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