JPH0216050Y2 - - Google Patents
Info
- Publication number
- JPH0216050Y2 JPH0216050Y2 JP1983111195U JP11119583U JPH0216050Y2 JP H0216050 Y2 JPH0216050 Y2 JP H0216050Y2 JP 1983111195 U JP1983111195 U JP 1983111195U JP 11119583 U JP11119583 U JP 11119583U JP H0216050 Y2 JPH0216050 Y2 JP H0216050Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fuel gas
- engine
- negative pressure
- passage
- 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
- 239000002737 fuel gas Substances 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 9
- 239000006200 vaporizer Substances 0.000 claims description 9
- 239000000446 fuel Substances 0.000 description 4
- 241000234435 Lilium Species 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000203 mixture Substances 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LPGのような液化ガスを駆動燃料と
してエンジンに供給する装置に関するものであ
る。[Detailed Description of the Invention] The present invention relates to a device that supplies liquefied gas such as LPG to an engine as a driving fuel.
耐圧容器の高圧液化ガスをベーパライザで減圧
ガス化して混合器に送り、空気と燃料ガスとを混
合してエンジンに供給する装置においては、エン
ジンの減速時にもベーパライザから混合器に燃料
ガスが送られ、特に低速系統を具えた混合器にお
いては高い吸入管負圧のため燃料ガスが大量に送
出され燃費経済性を悪化する問題があつた。 本
考案は減速時にのみ燃料ガス通路を閉鎖して記前
の問題点を解消し、更に進んで通常運転に円滑に
戻ることができるエンジン用液化ガス供給装置を
提供することを目的としてなされたものであつ
て、液化ガスを減圧ガス化するベーパライザおよ
び空気と燃料ガスとを混合する混合器を具えたエ
ンジン用液化ガス供給装置において、ベーパライ
ザの二次室から混合器の燃料ガス送出用のノズル
口へ至る燃料ガス通路に負圧駆動の開閉弁を設
け、この開閉弁は閉弁時に少量の燃料ガスを前記
ノズル口へ向つて送る連通路を有し、且つ前記開
閉弁の駆動部は電磁駆動の開閉弁によりエンジン
減速時にのみ導入される吸入管負圧により開閉弁
を閉弁させるように構成したことを特徴としてい
る。 In a device that uses a vaporizer to gasify high-pressure liquefied gas in a pressure-resistant container under reduced pressure and sends it to a mixer, mixing air and fuel gas and supplying the mixture to the engine, the fuel gas is sent from the vaporizer to the mixer even when the engine is decelerating. Especially in a mixer equipped with a low-speed system, a large amount of fuel gas is sent out due to the high negative pressure in the suction pipe, resulting in a problem of deteriorating fuel efficiency. The present invention has been made for the purpose of providing a liquefied gas supply device for an engine that solves the above-mentioned problems by closing the fuel gas passage only during deceleration, and furthermore, can smoothly return to normal operation. In a liquefied gas supply device for an engine, which includes a vaporizer that gasifies liquefied gas under reduced pressure and a mixer that mixes air and fuel gas, a nozzle port for delivering fuel gas from the secondary chamber of the vaporizer to the mixer. A negative pressure-driven on-off valve is provided in the fuel gas passage leading to the nozzle, and this on-off valve has a communication path that sends a small amount of fuel gas toward the nozzle port when the valve is closed, and the driving portion of the on-off valve is electromagnetically driven. The on-off valve is characterized by being configured so that the on-off valve is closed by the suction pipe negative pressure introduced only when the engine is decelerating.
次に本考案の具体例を図面に従つて説明する
と、第1図および第2図において耐圧容器1の高
圧液化ガスをベーパライザ2で減圧ガス化し、燃
料ガス通路4を経て混合器5のベンチユリ6に開
口したスリツト状のノズル口7から吸気路8に送
出して空気と混合し、吸入管9を経てエンジンに
供給するようになつている。燃料ガス通路4はベ
ーパライザ2の二次室3から混合器5の入口のコ
ネクタ10に至る外部通路11とコネクタ10か
らノズル口7に至る内部通路12とからなり、内
部通路12に弁座13およびその下流側のシート
面に着座する弁体14からなる開閉弁15が設け
られ、弁座13を貫通した弁棒16の基端は駆動
部17のダイヤフラム18の中心部に固着されて
いる。駆動部17は前記ダイヤフラム18と負圧
室19とばね20とを具え、負圧室19に内蔵し
たばね20の弾力で弁体14を弁座13から離間
させている。 Next, a specific example of the present invention will be explained according to the drawings. In FIGS. 1 and 2, high-pressure liquefied gas in a pressure-resistant container 1 is gasified under reduced pressure in a vaporizer 2, and then passed through a fuel gas passage 4 to a bench lily 6 of a mixer 5. The air is sent to an intake passage 8 through a slit-shaped nozzle opening 7, mixed with air, and supplied to the engine via an intake pipe 9. The fuel gas passage 4 consists of an external passage 11 extending from the secondary chamber 3 of the vaporizer 2 to the connector 10 at the inlet of the mixer 5, and an internal passage 12 extending from the connector 10 to the nozzle port 7. An on-off valve 15 consisting of a valve body 14 is provided to sit on the seat surface on the downstream side, and the base end of a valve rod 16 passing through the valve seat 13 is fixed to the center of a diaphragm 18 of a drive section 17. The drive section 17 includes the diaphragm 18, a negative pressure chamber 19, and a spring 20, and the elasticity of the spring 20 built into the negative pressure chamber 19 separates the valve element 14 from the valve seat 13.
吸入管9と負圧室19とを接続した負圧通路2
1には電磁駆動の制御弁22が設けられ、負圧室
19に吸入管負圧と大気とを選択的に導入する。
即ち、エンジン回転速度、絞り弁開度、吸入管圧
力などで減速運転であることを検知したとき負圧
室19を吸入管9と連通し、それ以外は負圧室1
9を大気と連通するように制御弁22を電気的に
操作するのである。 Negative pressure passage 2 connecting suction pipe 9 and negative pressure chamber 19
1 is provided with an electromagnetically driven control valve 22, which selectively introduces the suction pipe negative pressure and the atmosphere into the negative pressure chamber 19.
That is, when deceleration operation is detected based on the engine speed, throttle valve opening, suction pipe pressure, etc., the negative pressure chamber 19 is communicated with the suction pipe 9, and otherwise the negative pressure chamber 1 is connected to the suction pipe 9.
The control valve 22 is electrically operated to communicate the air outlet 9 with the atmosphere.
第3図は減速時の状態を示し、吸入管負圧によ
つて駆動部17のダイヤフラム18が負圧室19
の方へ吸引され、弁棒16の先端の弁体14が弁
座13に着座して内部通路12を閉鎖している。 FIG. 3 shows a state during deceleration, in which the diaphragm 18 of the drive section 17 is moved into the negative pressure chamber 19 by the suction pipe negative pressure.
The valve body 14 at the tip of the valve stem 16 seats on the valve seat 13 and closes the internal passage 12.
弁体14には小径の連通路23が設けてあり、
閉弁時に燃料ガスを少量ずつノズル口7へ向つて
送つて居り、減速運転が終つて通常運転に戻つた
とき燃料ガス不足によるカーノツク等のエンジン
トラブルの発生を防止している。 The valve body 14 is provided with a small diameter communication passage 23,
When the valve is closed, fuel gas is sent toward the nozzle port 7 little by little, thereby preventing engine troubles such as car knocking due to lack of fuel gas when normal operation is resumed after deceleration operation.
尚、開閉弁15は外部通路11に設けてもよ
い。また、開閉弁15の連通路23は弁座13の
特にシート面の一部を切欠くことによつて形成す
ることもある。 Note that the on-off valve 15 may be provided in the external passage 11. Further, the communication passage 23 of the on-off valve 15 may be formed by cutting out a part of the valve seat 13, particularly the seat surface.
以上のように、本考案によるとエンジンの減速
時にのみ吸入管負圧を利用して開閉弁を適切に閉
弁させ燃料ガス通路を閉鎖して燃料ガスがノズル
口から吸気路へ吸出されるのを防止し、燃料が不
要の減速時においてエンジンに燃料ガスが大量に
供給されず燃費経済性を高めるものであり、また
閉弁時に燃料ガスが少量ずつ開閉弁を通過するの
で減速運転を終つたとき燃料ガスの途切れによる
エンジントラブルの発生が防止され通常運転に円
滑に戻ることができるものである。 As described above, according to the present invention, only when the engine is decelerating, the intake pipe negative pressure is used to properly close the on-off valve and close the fuel gas passage, allowing fuel gas to be sucked out from the nozzle port into the intake passage. This prevents fuel gas from being supplied to the engine in large quantities during deceleration when fuel is not required, improving fuel economy.Furthermore, when the valve is closed, fuel gas passes through the opening/closing valve little by little, so that deceleration operation ends. This prevents engine troubles caused by interruptions in fuel gas and enables a smooth return to normal operation.
第1図は本考案の具体例を示す一部切截した正
面図、第2図は拡大縦断面部分図、第3図は閉弁
状態の縦断面部分図である。
2……ベーパライザ、3……二次室、4……燃
料ガス通路、5……混合器、7……ノズル口、9
……吸入管、13……弁座、14……弁体、15
……開閉弁、17……駆動部、18……ダイヤフ
ラム、19……負圧室、20……ばね、21……
負圧通路、22……制御弁、23……連通路。
FIG. 1 is a partially cut-away front view showing a specific example of the present invention, FIG. 2 is an enlarged partial vertical cross-sectional view, and FIG. 3 is a partial vertical cross-sectional view of the valve in the closed state. 2... Vaporizer, 3... Secondary chamber, 4... Fuel gas passage, 5... Mixer, 7... Nozzle port, 9
... Suction pipe, 13 ... Valve seat, 14 ... Valve body, 15
...Opening/closing valve, 17...Driving section, 18...Diaphragm, 19...Negative pressure chamber, 20...Spring, 21...
Negative pressure passage, 22...control valve, 23...communication passage.
Claims (1)
空気と燃料ガスとを混合する混合器を具えたエン
ジン用液化ガス供給装置において、ベーパライザ
の二次室から混合器の燃料ガス送出用のノズル口
へ至る燃料ガス通路に負圧駆動の開閉弁を設け、
この開閉弁は閉弁時に少量の燃料ガスを前記ノズ
ル口へ向つて送る連通路を有し、且つ前記開閉弁
の駆動部は電磁駆動の開閉弁によりエンジン減速
時にのみ導入される吸入管負圧により開閉弁を閉
弁させるように構成したことを特徴とするエンジ
ン用液化ガス供給装置。 In a liquefied gas supply system for an engine that is equipped with a vaporizer that gasifies liquefied gas under reduced pressure and a mixer that mixes air and fuel gas, the fuel gas that flows from the secondary chamber of the vaporizer to the nozzle port for delivering fuel gas of the mixer. A negative pressure-driven on-off valve is installed in the passage,
This on-off valve has a communication path that sends a small amount of fuel gas toward the nozzle port when the valve is closed, and the driving part of the on-off valve is an electromagnetically driven on-off valve that generates suction pipe negative pressure that is introduced only when the engine is decelerating. A liquefied gas supply device for an engine, characterized in that the on-off valve is configured to be closed by the following steps.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11119583U JPS6018254U (en) | 1983-07-18 | 1983-07-18 | Liquefied gas supply equipment for engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11119583U JPS6018254U (en) | 1983-07-18 | 1983-07-18 | Liquefied gas supply equipment for engines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6018254U JPS6018254U (en) | 1985-02-07 |
JPH0216050Y2 true JPH0216050Y2 (en) | 1990-05-01 |
Family
ID=30258294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11119583U Granted JPS6018254U (en) | 1983-07-18 | 1983-07-18 | Liquefied gas supply equipment for engines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6018254U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7191768B2 (en) * | 2002-08-09 | 2007-03-20 | Isuza Motors Limited | Gas fuel feed device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS499122A (en) * | 1972-05-12 | 1974-01-26 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52133815U (en) * | 1976-04-07 | 1977-10-12 |
-
1983
- 1983-07-18 JP JP11119583U patent/JPS6018254U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS499122A (en) * | 1972-05-12 | 1974-01-26 |
Also Published As
Publication number | Publication date |
---|---|
JPS6018254U (en) | 1985-02-07 |
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