JPH0450450Y2 - - Google Patents
Info
- Publication number
- JPH0450450Y2 JPH0450450Y2 JP1986114907U JP11490786U JPH0450450Y2 JP H0450450 Y2 JPH0450450 Y2 JP H0450450Y2 JP 1986114907 U JP1986114907 U JP 1986114907U JP 11490786 U JP11490786 U JP 11490786U JP H0450450 Y2 JPH0450450 Y2 JP H0450450Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- mixer
- fuel
- negative pressure
- suction port
- 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 34
- 241000234435 Lilium Species 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 15
- 239000002737 fuel gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、ガス燃料エンジンの燃料供給装置に
おいて、エンジンの停止後に、燃料ガスがミキサ
に漏洩することを、遮断弁で防止する技術に関す
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a technology for preventing fuel gas from leaking into a mixer after the engine is stopped, using a shutoff valve in a fuel supply system for a gas fuel engine.
ガス燃料エンジンの停止後に、燃料ガスがミキ
サに漏洩することを防止するための基本的な構造
は、例えば第1図または第3図に示すように、次
のようになつている。
The basic structure for preventing fuel gas from leaking into the mixer after the gas fuel engine is stopped is as shown in FIG. 1 or 3, for example, as follows.
すなわち、ガス供給源5からミキサ1の燃料吸
出口8に至るガス燃料供給路6に、ミキサ1の吸
気路7のスロツトル弁4の下流の吸気負圧が無い
ときに閉弁される遮断弁9を設けて構成したもの
である。 That is, the cutoff valve 9 is closed when there is no intake negative pressure downstream of the throttle valve 4 in the intake passage 7 of the mixer 1 in the gas fuel supply passage 6 from the gas supply source 5 to the fuel suction port 8 of the mixer 1. It is configured by providing.
上記前提構造において、従来技術では、第3図
に示すように、レギユレータ24とミキサ1とを
つなぐガス供給管の途中に、前記遮断弁9を介在
させたものがある。(近似資料:実公昭40−9204
号公報)
〔考案が解決しようとする課題〕
上記従来技術では、次の問題点がある。
In the above-mentioned structure, in the prior art, as shown in FIG. 3, the cutoff valve 9 is interposed in the middle of the gas supply pipe connecting the regulator 24 and the mixer 1. (Approximate material: Jikko Sho 40-9204
(No. Publication) [Problems to be solved by the invention] The above-mentioned conventional technology has the following problems.
(イ) レギユレータ24および遮断弁9をミキサ1
に連通連結するために、レギユレータ24と遮
断弁9とをつなぐガス供給管、遮断弁9とミキ
サ1とをつなぐガス供給管、およびミキサ1と
遮断弁9とをつなぐ負圧案内管、の合計3本の
管が要るうえ、6個の管接手が要ることから、
その配管構造が繁雑で、高価につく。(a) The regulator 24 and the shutoff valve 9 are connected to the mixer 1
A total of a gas supply pipe that connects the regulator 24 and the cutoff valve 9, a gas supply pipe that connects the cutoff valve 9 and the mixer 1, and a negative pressure guide pipe that connects the mixer 1 and the cutoff valve 9. Because it requires three pipes and six pipe joints,
The piping structure is complicated and expensive.
(ロ) 上記3本の管、独立部品としての遮断弁9、
およびこの遮断弁9の支持装置が必要な分だ
け、これらの各部品の必要スペースが大きくな
り、エンジンを大形にしている。しかも製造コ
ストを高くしている。(b) The above three pipes, the shutoff valve 9 as an independent component,
The space required for each of these parts increases to the extent that a support device for the shutoff valve 9 is required, making the engine large. Moreover, it increases manufacturing costs.
本考案は、上記前提構造において、例えば第1
図に示すように、前記遮断弁9を次のように構成
したことを特徴とする。
In the above-mentioned premise structure, the present invention provides, for example, the first
As shown in the figure, the cutoff valve 9 is characterized in that it is configured as follows.
すなわち、前記ミキサ1のうちの燃料吸出口8
とは反対側のミキサ部分に前記遮断弁9の負圧駆
動部12を設け、
この遮断弁9の負圧駆動部12で進退駆動され
るステム11をミキサ1内のベンチユリ部2内に
突入させ、
このベンチユリ部2内で、ステム11の先端に
設けた弁部材10をミキサ1の燃料吸出口8に開
閉接離自在に対面させ
て構成したものである。 That is, the fuel suction port 8 of the mixer 1
A negative pressure drive part 12 of the cutoff valve 9 is provided in the mixer part on the opposite side, and the stem 11, which is driven forward and backward by the negative pressure drive part 12 of the cutoff valve 9, is thrust into the bench lily part 2 in the mixer 1. In this bench lily portion 2, a valve member 10 provided at the tip of a stem 11 is configured to face the fuel suction port 8 of the mixer 1 so as to be openable and detachable.
本考案は、上記のように構成したことから、次
の効果を奏する。
Since the present invention is configured as described above, it has the following effects.
(イ) 遮断弁をミキサの一部に設けるので、この遮
断弁とレギユレータとをつなぐ負圧案内路は、
ミキサおよび遮断弁にあけた孔で形成できるの
で、管を用いなくて済む。(b) Since the shutoff valve is installed in a part of the mixer, the negative pressure guide path connecting this shutoff valve and the regulator is
It can be formed with holes drilled in the mixer and isolation valve, eliminating the need for pipes.
そして、レギユレータとミキサとを1本のガ
ス供給管で接続するだけでよい。 Then, it is only necessary to connect the regulator and the mixer with one gas supply pipe.
これにより、レギユレータおよび遮断弁をミ
キサに連通連結するために、前記従来技術では
3本の管と6個の管接手を必要としていたのに
対し、本考案ではその3分の1の1本の管と2
個の管接手に減らすことができ、その配管構造
が大幅に簡素化され、安価になる。 As a result, in order to connect the regulator and the shutoff valve to the mixer, the conventional technology required three pipes and six pipe joints, whereas the present invention requires one third of the pipe joints. pipe and 2
The number of pipe joints can be reduced to a number of pipe joints, which greatly simplifies the piping structure and makes it cheaper.
(ロ) 遮断弁をミキサの一部に設けるので、遮断弁
の本体をミキサの本体の一部で兼用させて、そ
の構造を簡素化できる。(b) Since the cutoff valve is provided in a part of the mixer, the main body of the cutoff valve can also be used as a part of the mixer main body, and the structure can be simplified.
そのうえ、遮断弁の弁部材をミキサの燃料吸
出口に開閉接離自在に対面させたので、この弁
部材で開閉される弁座および弁入口孔をミキサ
の燃料吸出口で兼用させて、その構造を簡素化
できる。 Furthermore, since the valve member of the shutoff valve faces the fuel suction port of the mixer so that it can be opened and closed, the valve seat and the valve inlet hole, which are opened and closed by this valve member, are also used as the fuel suction port of the mixer. can be simplified.
これにより、ミキサと遮断弁とのトータルの
構造を簡素化・小形化することができる。 Thereby, the total structure of the mixer and the shutoff valve can be simplified and downsized.
(ハ) 上記のように、ミキサと遮断弁とのトータル
の構造を簡素化・小形化できる。(c) As mentioned above, the total structure of the mixer and shutoff valve can be simplified and downsized.
遮断弁はミキサに一体に組込まれるから、遮
断弁の支持装置を省略できる。 Since the shutoff valve is integrated into the mixer, a support device for the shutoff valve can be omitted.
しかも、レギユレータおよび遮断弁をミキサ
に連通連結するために必要な管の本数を3本か
ら1本に減らすことができる。 Furthermore, the number of pipes required to fluidly connect the regulator and the shutoff valve to the mixer can be reduced from three to one.
この3つの総合により、遮断弁や配管などの
各部品の必要スペースが小さくなり、エンジン
を小形化できる。しかも、製造コストを引下げ
ることもできる。 By combining these three factors, the space required for each component such as the shutoff valve and piping is reduced, allowing the engine to be made smaller. Furthermore, manufacturing costs can also be reduced.
以下、本考案の一実施例を第1図および第2図
に基づいて説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第1図は本考案の一実施例の要部の縦断面図で
あり、第2図はそのスロツトル弁とチヨーク弁と
の連動機構の正面図である。 FIG. 1 is a vertical cross-sectional view of a main part of an embodiment of the present invention, and FIG. 2 is a front view of an interlocking mechanism between a throttle valve and a choke valve.
ガス燃料エンジンEに接続されるミキサ1は、
吸気が通過するベンチユリ部2と、その上流のチ
ヨーク弁3と、その下流のスロツトル弁4とを備
え、ガス供給源としてのガスボンベ5からガス燃
料供給路6を介して供給される燃料を吸気路7に
放出する燃料吸出口8は上記ベンチユリ部2の周
面に開口されている。 The mixer 1 connected to the gas fuel engine E is
It is equipped with a bench lily section 2 through which intake air passes, a choke valve 3 upstream thereof, and a throttle valve 4 downstream thereof. A fuel suction port 8 for discharging fuel into the fuel tank 7 is opened on the circumferential surface of the bench lily part 2.
この燃料吸出口8には、これに向かつて進退す
る遮断弁9が設けられる。この遮断弁9は、燃料
吸出口8に接離する弁部材10と、上記ベンチユ
リ部2の周壁の燃料吸出口8に対抗する部分に気
蜜状に、かつ、進退可能に支持されたステム11
と、このステム11に連結された負圧駆動部12
とを備える。負圧駆動部12は、大気中に解放さ
れた大気圧受圧室13と、吸気路7のスロツトル
弁4の下流側に連通連結された吸気負圧受圧室1
4と、両受圧室13,14を区画するダイアフラ
ム15と、このダイアフラム15を大気圧受圧室
13側に付勢する閉弁バネ16とを備えている。
上記弁部材10はステム11を介して負圧駆動部
12のダイアフラム15に結合され、ダイアフラ
ム15の両面に作用する差圧によつて閉弁バネ1
6に抗して開弁方向に駆動され、ダイアフラム1
5の両面に作用する差圧が解消すれば閉弁バネ1
6によつて燃料吸出口8を閉塞する閉弁位置に変
位させられるようになつている。 This fuel suction port 8 is provided with a shutoff valve 9 that moves forward and backward toward the fuel suction port 8 . This shutoff valve 9 includes a valve member 10 that approaches and separates from the fuel suction port 8, and a stem 11 that is airtightly supported on a portion of the peripheral wall of the bench lily portion 2 that opposes the fuel suction port 8 so as to be movable back and forth.
and a negative pressure drive section 12 connected to this stem 11.
Equipped with. The negative pressure drive unit 12 includes an atmospheric pressure receiving chamber 13 that is open to the atmosphere, and an intake negative pressure receiving chamber 1 that is connected to the downstream side of the throttle valve 4 of the intake path 7.
4, a diaphragm 15 that partitions both pressure receiving chambers 13 and 14, and a valve closing spring 16 that urges this diaphragm 15 toward the atmospheric pressure receiving chamber 13.
The valve member 10 is connected to a diaphragm 15 of a negative pressure drive unit 12 via a stem 11, and the valve closing spring 1 is activated by the differential pressure acting on both sides of the diaphragm 15.
6, the diaphragm 1 is driven in the valve opening direction against the diaphragm 1.
If the differential pressure acting on both sides of valve 5 is eliminated, valve closing spring 1
6 to the valve closing position where the fuel suction port 8 is closed.
尚、上記チヨーク弁3は、例えば、第2図に示
す連動機構17を介して、始動時に全開されるス
ロツトル弁に連動して閉弁されるように構成され
ている。 The throttle valve 3 is configured to be closed in conjunction with the throttle valve, which is fully opened at the time of starting, via an interlocking mechanism 17 shown in FIG. 2, for example.
即ち、この連動機構17は、スロツトル弁4の
弁軸18に固定された片腕レバー19と、チヨー
ク弁3の弁軸20に固定された両腕レバー21
と、片腕レバー19と両腕レバー21とを連結す
るロツド22と、両腕レバー21及び弁軸20を
介してチヨーク弁3を開弁方向に付勢する開弁バ
ネ23とを有する。ロツド23の一端は片腕レバ
ー19に回転可能に連結され、ロツド22の他端
は両腕レバー21に形成された長穴24に摺動及
び回転可能に連結される。そして、スロツトル弁
4が全開される始動位置(1点鎖線で示す)に片
腕レバー19を移動させると、ロツド22を介し
て両腕レバー21が開弁バネ23に抗して全閉位
置(1点鎖線で示す)に移動され、チヨーク弁3
が全閉状態になるように構成されている。 That is, this interlocking mechanism 17 includes a one-arm lever 19 fixed to the valve shaft 18 of the throttle valve 4 and a double-arm lever 21 fixed to the valve shaft 20 of the throttle valve 3.
, a rod 22 that connects the one-arm lever 19 and the two-arm lever 21, and a valve-opening spring 23 that biases the valve 3 in the opening direction via the two-arm lever 21 and the valve shaft 20. One end of the rod 23 is rotatably connected to the one-arm lever 19, and the other end of the rod 22 is slidably and rotatably connected to an elongated hole 24 formed in the double-arm lever 21. When the one-arm lever 19 is moved to the starting position (indicated by the one-dot chain line) where the throttle valve 4 is fully opened, the two-arm lever 21 is moved to the fully closed position (indicated by the one-dot chain line) via the rod 22 against the valve opening spring 23. (indicated by the dotted chain line), and the valve 3 is moved to
is configured so that it is fully closed.
上記の構成において、エンジンの始動時には、
スロツトル弁4が全開され、チヨーク弁3は全閉
とされる。そして、エンジンの回転が始まると、
吸気路7がチヨーク弁3によつて閉じられている
ので、スロツトル弁4の下流には負圧が発生し、
負圧駆動部12の吸気負圧受圧室14の内圧が負
圧になる結果、ダイアフラム15にこの負圧と大
気との差圧が作用し、この差圧で閉弁バネ16に
打ち勝つてステム11及び弁部材10が開弁方向
に駆動されて、弁部材10が燃料吸出口8を解放
することになる。また、運転中のエンジンが停止
すると吸気路7の負圧が解消し、吸気路7の内圧
は大気圧と等しくなる。その結果、吸気負圧受圧
室14の内圧が大気圧になり、ダイアフラム15
に作用していた差圧が解消し、閉弁バネ16によ
つてステム11及び弁部材10が閉弁方向に駆動
されて、弁部材10が燃料吸出口8を閉塞するこ
とになる。尚、運転中にスロツトル弁4が全開近
くまで開弁されると、スロツトル弁の前後の圧力
差は小さくなるが、チヨーク弁3がスロツトル弁
4に連動して閉弁されるので、チヨーク弁3の下
流にあるスロツトル弁4の更に下流は負圧状態に
維持され、遮断弁9は開弁状態に維持される。 In the above configuration, when starting the engine,
The throttle valve 4 is fully opened, and the choke valve 3 is fully closed. Then, when the engine starts rotating,
Since the intake passage 7 is closed by the choke valve 3, negative pressure is generated downstream of the throttle valve 4.
As a result of the internal pressure of the intake negative pressure receiving chamber 14 of the negative pressure drive unit 12 becoming a negative pressure, a differential pressure between this negative pressure and the atmosphere acts on the diaphragm 15, and this differential pressure overcomes the valve closing spring 16 to close the stem 11. Then, the valve member 10 is driven in the valve opening direction, and the valve member 10 opens the fuel suction port 8. Further, when the engine in operation is stopped, the negative pressure in the intake passage 7 is eliminated, and the internal pressure in the intake passage 7 becomes equal to atmospheric pressure. As a result, the internal pressure of the intake negative pressure receiving chamber 14 becomes atmospheric pressure, and the diaphragm 15
The differential pressure that was acting on the valve is eliminated, the stem 11 and the valve member 10 are driven in the valve closing direction by the valve closing spring 16, and the valve member 10 closes the fuel suction port 8. Note that when the throttle valve 4 is opened nearly fully open during operation, the pressure difference before and after the throttle valve becomes small, but since the throttle valve 3 is closed in conjunction with the throttle valve 4, the throttle valve 3 The downstream side of the throttle valve 4 is maintained in a negative pressure state, and the shutoff valve 9 is maintained in an open state.
このようにして、エンジンの停止に即応して解
消される吸気負圧を利用してエンジンの運転中に
はガス燃料供給路6の遮断弁9を開弁させ、エン
ジンの停止と同時に遮断弁9を自動的に閉弁させ
るので、キースイツチの操作とは無関係に、エン
ジン停止時に確実にガス燃料供給路6を遮断し
て、燃料ガスの漏洩を確実に防止できる。特に、
遮断弁9がミキサ1の燃料吸出口8を開閉するよ
うに構成された本実施例では、エンジンの始動時
及び停止時の燃料供給の開始及び停止の応答を最
も敏感にすることができる。 In this way, the intake negative pressure that is immediately resolved when the engine stops is used to open the shutoff valve 9 of the gas fuel supply path 6 while the engine is running, and the shutoff valve 9 of the gas fuel supply path 6 is opened at the same time as the engine is stopped. Since the valve is automatically closed, the gas fuel supply path 6 can be reliably shut off when the engine is stopped, and leakage of fuel gas can be reliably prevented, regardless of the operation of the key switch. especially,
In this embodiment, in which the shutoff valve 9 is configured to open and close the fuel suction port 8 of the mixer 1, the response to start and stop of fuel supply when starting and stopping the engine can be made most sensitive.
第1図は本考案の一実施例の要部の縦断面図、
第2図はそのスロツトル弁とチヨーク弁との連動
機構の正面図、第3図は従来技術の燃料ガス供給
用配管図である。
1……ミキサ、4……スロツトル弁、5……ガ
ス供給源(ガスボンベ)、6……ガス燃料供給路、
7……吸気路、8……燃料吸出口、9……遮断
弁、10……弁部材、11……ステム、12……
負圧駆動部。
FIG. 1 is a vertical cross-sectional view of the main parts of an embodiment of the present invention.
FIG. 2 is a front view of the interlocking mechanism between the throttle valve and the choke valve, and FIG. 3 is a diagram of the fuel gas supply piping of the prior art. 1... Mixer, 4... Throttle valve, 5... Gas supply source (gas cylinder), 6... Gas fuel supply path,
7...Intake path, 8...Fuel suction port, 9...Shutoff valve, 10...Valve member, 11...Stem, 12...
Negative pressure drive unit.
Claims (1)
るガス燃料供給路6に、ミキサ1の吸気路7のス
ロツトル弁4の下流の吸気負圧が無いときに閉弁
される遮断弁9を設けて構成した、 ガス燃料エンジンの燃料供給装置において、 前記ミキサ1のうちの燃料吸出口8とは反対側
のミキサ部分に前記遮断弁9の負圧駆動部12を
設け、 この遮断弁9の負圧駆動部12で進退駆動され
るステム11をミキサ1内のベンチユリ部2内に
突入させ、 このベンチユリ部2内で、ステム11の先端に
設けた弁部材10をミキサ1の燃料吸出口8に開
閉接離自在に対面させて構成したことを特徴とす
るガス燃料エンジンの燃料供給装置。[Scope of Claim for Utility Model Registration] Closed when there is no intake negative pressure downstream of the throttle valve 4 in the intake passage 7 of the mixer 1 in the gas fuel supply passage 6 from the gas supply source 5 to the fuel suction port 8 of the mixer 1. In a fuel supply system for a gas fuel engine, which is configured with a shutoff valve 9 that is operated, a negative pressure drive section 12 of the shutoff valve 9 is connected to a portion of the mixer 1 on the side opposite to the fuel suction port 8. The stem 11, which is driven forward and backward by the negative pressure drive section 12 of the shutoff valve 9, is inserted into the bench lily section 2 of the mixer 1, and within the bench lily section 2, the valve member 10 provided at the tip of the stem 11 is inserted. A fuel supply device for a gas fuel engine, characterized in that it is configured to face a fuel suction port 8 of a mixer 1 so as to be openable and detachable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986114907U JPH0450450Y2 (en) | 1986-07-25 | 1986-07-25 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986114907U JPH0450450Y2 (en) | 1986-07-25 | 1986-07-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6321754U JPS6321754U (en) | 1988-02-13 |
JPH0450450Y2 true JPH0450450Y2 (en) | 1992-11-27 |
Family
ID=30998073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986114907U Expired JPH0450450Y2 (en) | 1986-07-25 | 1986-07-25 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0450450Y2 (en) |
-
1986
- 1986-07-25 JP JP1986114907U patent/JPH0450450Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6321754U (en) | 1988-02-13 |
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