JPH0467021B2 - - Google Patents
Info
- Publication number
- JPH0467021B2 JPH0467021B2 JP60265703A JP26570385A JPH0467021B2 JP H0467021 B2 JPH0467021 B2 JP H0467021B2 JP 60265703 A JP60265703 A JP 60265703A JP 26570385 A JP26570385 A JP 26570385A JP H0467021 B2 JPH0467021 B2 JP H0467021B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic oil
- valve
- passage
- gas injection
- piston 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 - Lifetime
Links
- 239000010720 hydraulic oil Substances 0.000 claims description 74
- 238000002347 injection Methods 0.000 claims description 43
- 239000007924 injection Substances 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 42
- 239000002737 fuel gas Substances 0.000 claims description 23
- 238000007872 degassing Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0263—Inwardly opening single or multi nozzle valves, e.g. needle valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明はガス焚き機関におけるガス噴射弁駆
動用の作動油制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydraulic oil control device for driving a gas injection valve in a gas-fired engine.
（従来の技術）
従来より、ガス焚き機関用のガス噴射弁として
は種々の構造のものが実用化され、また提案され
ている。その具体例を第４図に示すが、このガス
噴射弁は、噴射弁本体に針弁５２を摺動自在に保
持し、この針弁５２の移動によつて、弁本体に穿
設された燃料ガスの流路５３と、ノズル５４に設
けた噴射孔５５との間を連通、遮断する構造のも
のである。この場合、上記針弁５２はバネ５６に
よつて常に下方へ、すなわち上記流路５３を閉じ
る方向へと付勢されている。そして上記針弁５２
にはピストン部５７が形成され、このピストン部
５７がピストン室５８内へと導出されている。す
なわち、作動油が、弁本体に穿設された作動油用
の流路５９から上記ピストン室５８へと供給され
た際に、この圧力でピストン部５７を押圧して、
上記バネ５６の力に抗して針弁５２を移動させ、
上記燃料ガスの流路５３を開いて、噴出孔５５か
ら燃料ガスを噴射し得るようなされている訳であ
る。(Prior Art) Conventionally, various structures of gas injection valves for gas-fired engines have been put to practical use or proposed. A specific example is shown in FIG. 4. This gas injection valve has a needle valve 52 slidably held in the injection valve body, and the movement of the needle valve 52 allows the fuel to be pierced in the valve body. It has a structure that communicates and blocks communication between the gas flow path 53 and the injection hole 55 provided in the nozzle 54. In this case, the needle valve 52 is always urged downward by the spring 56, that is, in the direction of closing the flow path 53. and the needle valve 52
A piston part 57 is formed in the piston part 57, and this piston part 57 is led out into a piston chamber 58. That is, when the hydraulic oil is supplied to the piston chamber 58 from the hydraulic oil passage 59 bored in the valve body, the piston part 57 is pressed by this pressure.
moving the needle valve 52 against the force of the spring 56;
The fuel gas flow path 53 is opened so that the fuel gas can be injected from the injection hole 55.
（発明が解決しようとする問題点）
ところで上記構成のガス噴射弁において、燃料
ガスの噴射を止める場合は、上記ピストン室５８
に供給された作動油が吸い戻されることになるの
であるが、このように同じ作動油が流路５９内を
往復動して繰り返し加圧、減圧されると、温度が
上昇し、ベーパロツクを起こすことがあつた。ま
た通常運転中においてもこの作動油に燃料ガスが
混入することがある。しかしながらこのような場
合に上記従来のガス噴射弁によると、発生したベ
ーパや混入した燃料ガスを抜き取ることができな
いので、作動油の圧力が上昇しなくなり、ガス噴
射弁としての機能を果さなくなることがあるとい
う問題があつた。そこでベーパや燃料ガスが混入
した状態でも上記ガス噴射弁を作動させるべく上
記作動油をさらに加圧できるようにすることが考
えられるが、この場合にはベーパや燃料ガスが混
入していない状態のときにこの圧力の上昇分を作
動油配管が変形してこれを吸収することができな
くなり、極めて高圧となつて危険な状態になるも
のと予想される。(Problem to be Solved by the Invention) By the way, in the gas injection valve having the above configuration, when stopping the injection of fuel gas, the piston chamber 58
The hydraulic oil supplied to the flow path 59 is sucked back, but when the same hydraulic oil moves back and forth in the flow path 59 and is repeatedly pressurized and depressurized, its temperature rises and vapor lock occurs. Something happened. Also, fuel gas may be mixed into this hydraulic oil even during normal operation. However, in such cases, according to the conventional gas injection valve, the generated vapor and mixed fuel gas cannot be extracted, so the pressure of the hydraulic oil does not increase, and the valve no longer functions as a gas injection valve. There was a problem that there was. Therefore, it may be possible to further pressurize the hydraulic oil in order to operate the gas injection valve even when vapor or fuel gas is mixed in. It is expected that the hydraulic fluid piping will sometimes deform and become unable to absorb this pressure increase, resulting in extremely high pressure and a dangerous situation.
この発明は上記問題点を解決するためになされ
たものであつて、その目的は、作動油にベーパロ
ツクが発生するのを防止し、かつガス噴射弁の運
転中に作動油に混入した燃料ガスを連続的に抜き
取ることのできるガス噴射弁駆動用の作動油制御
装置を提供することにある。 This invention was made in order to solve the above problems, and its purpose is to prevent vapor lock from occurring in the hydraulic oil and to prevent fuel gas mixed into the hydraulic oil during operation of the gas injection valve. An object of the present invention is to provide a hydraulic oil control device for driving a gas injection valve that can continuously extract oil.
（問題点を解決するための手段）
そこでこの発明のガス噴射弁駆動用の作動油制
御装置においては、弁本体に燃料ガス流路を開閉
する針弁が摺動自在に配置されると共に、この針
弁を作動させるためのピストン室を有するガス噴
射弁と、上記ピストン室に第１通路を介して接続
され、該ピストン室に作動油を供給する作動油ポ
ンプと、上記ピストン室に第２通路を介して接続
されたドレンタンクと、上記第２通路に介設され
た流れ抵抗とを有する構成としてある。(Means for Solving the Problems) Therefore, in the hydraulic oil control device for driving a gas injection valve of the present invention, a needle valve for opening and closing the fuel gas flow path is slidably disposed in the valve body, and the needle valve is slidably disposed in the valve body. a gas injection valve having a piston chamber for operating a needle valve; a hydraulic oil pump connected to the piston chamber via a first passage and supplying hydraulic oil to the piston chamber; and a second passage in the piston chamber. The drain tank is connected via a drain tank, and a flow resistance is provided in the second passage.
（作用）
このような構成で、先ず作動油を第１通路から
ガス噴射弁のピストン室、このピストン室から第
２通路へと導いておく。そして作動油ポンプによ
り作動油の供給（加圧）と吸い戻し（減圧）とを
繰り返して行い、針弁を作動させるのであるが、
作動油は所定の圧力で流れ抵抗を介してドレンタ
ンクへと排出されるので、これにより第２通路内
の最高圧力が規制されることになる。つまり供給
された作動油は徐々にドレンタンクへと排出され
て行くので、従来のように同じ作動油が流路内を
往復動して温度が上昇するというようなことはな
くなり、ベーパロツクの発生が未然に防止される
ことになる。またガス噴射弁の運転中に作動油に
燃料ガスが混入するようなことがあつても、該燃
料ガスは第２通路を通して作動油と共に連続的に
抜き取られることになるのである。(Function) With such a configuration, first, hydraulic oil is guided from the first passage to the piston chamber of the gas injection valve, and from this piston chamber to the second passage. The hydraulic oil pump then repeatedly supplies (pressurizes) and sucks back (depressurizes) hydraulic oil to operate the needle valve.
Since the hydraulic oil is discharged to the drain tank via the flow resistance at a predetermined pressure, the maximum pressure in the second passage is thereby regulated. In other words, the supplied hydraulic oil is gradually discharged to the drain tank, so the same hydraulic oil does not move back and forth in the flow path and the temperature rises, which is the case in the past, and the occurrence of vapor lock is eliminated. This will be prevented in advance. Furthermore, even if fuel gas were to mix into the hydraulic oil during operation of the gas injection valve, the fuel gas would be continuously extracted together with the hydraulic oil through the second passage.
（実施例）
次にこの発明のガス噴射弁駆動用の作動油制御
装置の具体的な実施例につき、図面を参照しつつ
詳細に説明する。(Example) Next, a specific example of the hydraulic oil control device for driving a gas injection valve according to the present invention will be described in detail with reference to the drawings.
第１図において、１はガス噴射弁であつて、そ
の弁本体２内に燃料ガス流路３を開閉する針弁４
が摺動自在に配置されると共に、この針弁４を作
動させるためのピストン室５を有している。そし
て上記針弁４のピストン部６がこのピストン室５
内に導出されている。上記ピストン室５には第１
通路７を介して作動油ポンプ８が接続されている
が、この作動油ポンプ８は上記ピストン室５に作
動油を供給する働きをなすものである。また上記
ピストン室５には第２通路９を介してドレンタン
ク１０が接続されており、上記第２通路９にはリ
リーフ弁１１と切換弁１２とが並列に介設されて
いる。つまり上記ピストン室５に供給された作動
油は、後述するように上記リリーフ弁１１または
切換弁１２を介して上記ドレンタンク１０へと排
出される。 In FIG. 1, 1 is a gas injection valve, and a needle valve 4 inside the valve body 2 opens and closes a fuel gas passage 3.
is slidably arranged therein, and has a piston chamber 5 for operating the needle valve 4. The piston portion 6 of the needle valve 4 is connected to this piston chamber 5.
It is derived within. The piston chamber 5 has a first
A hydraulic oil pump 8 is connected through the passage 7, and this hydraulic oil pump 8 serves to supply hydraulic oil to the piston chamber 5. A drain tank 10 is connected to the piston chamber 5 via a second passage 9, and a relief valve 11 and a switching valve 12 are provided in parallel in the second passage 9. That is, the hydraulic oil supplied to the piston chamber 5 is discharged to the drain tank 10 via the relief valve 11 or the switching valve 12, as will be described later.
上記ガス噴射弁１は、上記弁本体２と、この弁
本体２内に摺動自在に配置された上記針弁４と、
弁本体２の先端部に取着されたノズル１３とから
構成されている。そしてその弁本体２は、弁基部
１４の先端に針弁案内１５を配置し、これらの外
周部を弁ホルダ１６で囲つて一体化すると共に、
上記弁ホルダ１６から突出した針弁案内１５の先
端部をノズルホルダ１７で囲い、さらにこのノズ
ルホルダ１７をキヤツプナツト１８で囲うと共
に、このキヤツプナツト１８を上記弁ホルダ１６
の先端部に取着することによつて構成されてい
る。この場合、上記ノズルホルダ１７は上記針弁
案内１５の先端にノズル１３を突き合わせるよう
にして保持している。また上記弁基部１４の軸心
部にはバネ１９が配置され、押え部材２０を介し
て上記針弁４を下方へ、すなわち上記燃料ガス流
路３を閉塞する方向に付勢している。そして上記
弁基部１４と針弁案内１５との内部に、上記ピス
トン室５に連通する作動油供給流路２１と作動油
排出流路２２とがそれぞれ穿設されている。上述
の第１通路７は、この作動油供給流路２１と、第
１配管２３とから構成され、上述の第２通路９
は、この作動排出流路２２と、第２配管２４とか
ら構成されている。なお上記弁基部１４と、針弁
案内１５との内部にはシール油供給流路２５が穿
設されている。また針弁案内１５の内部には弁室
２６が形成されており、この弁室２６に上記針弁
４が当接するための弁シート２７が設けられ、上
記燃料ガス流路３はこの弁室２６に接続されてい
る。 The gas injection valve 1 includes the valve body 2, the needle valve 4 slidably disposed within the valve body 2,
The nozzle 13 is attached to the tip of the valve body 2. The valve body 2 has a needle valve guide 15 disposed at the tip of the valve base 14, and their outer peripheral parts are surrounded by a valve holder 16 to integrate them.
The tip of the needle valve guide 15 protruding from the valve holder 16 is surrounded by a nozzle holder 17, and this nozzle holder 17 is further surrounded by a cap nut 18.
It is constructed by attaching it to the tip of the In this case, the nozzle holder 17 holds the nozzle 13 against the tip of the needle valve guide 15. Further, a spring 19 is disposed at the axial center of the valve base 14, and biases the needle valve 4 downward through a pressing member 20, that is, in a direction to close the fuel gas flow path 3. A hydraulic oil supply passage 21 and a hydraulic oil discharge passage 22 communicating with the piston chamber 5 are bored inside the valve base 14 and the needle valve guide 15, respectively. The above-mentioned first passage 7 is composed of this hydraulic oil supply passage 21 and the first pipe 23, and the above-mentioned second passage 9
is composed of this working discharge flow path 22 and a second pipe 24. Note that a seal oil supply channel 25 is bored inside the valve base 14 and the needle valve guide 15. Further, a valve chamber 26 is formed inside the needle valve guide 15, a valve seat 27 for the needle valve 4 to abut on this valve chamber 26 is provided, and the fuel gas flow path 3 is connected to the valve chamber 26. It is connected to the.
上記作動油ポンプ８のポンプ本体２８は、ポン
プホルダ２９と、このホルダ２９の基端部に挿入
されたポンプ基部３０とから構成されている。そ
して上記ポンプホルダ２９の内部にはスリーブ３
１が配置されると共に、このスリーブ３１内にシ
リンダ室３２が形成され、このシリンダ室３２内
にプランジヤ３３が出退動自在に配置されてい
る。また上記スリーブ３１の基端部にはスリーブ
キヤツプ３４が挿入され、このスリーブキヤツプ
３４と上記ポンプ基部３０との間に弁ホルダ３５
が配置されている。そして上記ポンプホルダ２９
の側面には上記シリンダ室３２に連通する作動油
注入口３６が穿設されている。また上記ポンプ基
部３０と、弁ホルダ３５と、スリーブキヤツプ３
４との間にわたつて作動油流路３７が穿設されて
おり、吐出弁３８が上記弁ホルダ３５に保持され
た状態でこの作動油流路３７に介設されている。
そして上記ポンプ基部３０と弁ホルダ３５との内
部に、上記吐出弁３８の前後をバイパスするバイ
パス流路３９が穿設され、その両端が上記作動油
流路３７に接続されている。このバイパス流路３
９にはボールバルブ４０が穿設されているが、そ
の弁操作ネジ４１の頭部はポンプ基部３０の側方
に突出させられている。 The pump body 28 of the hydraulic oil pump 8 includes a pump holder 29 and a pump base 30 inserted into the base end of the holder 29. Inside the pump holder 29 is a sleeve 3.
A cylinder chamber 32 is formed within this sleeve 31, and a plunger 33 is disposed within this cylinder chamber 32 so as to be able to move forward and backward. A sleeve cap 34 is inserted into the base end of the sleeve 31, and a valve holder 35 is inserted between the sleeve cap 34 and the pump base 30.
is located. and the pump holder 29
A hydraulic oil inlet 36 communicating with the cylinder chamber 32 is bored in the side surface of the cylinder. In addition, the pump base 30, the valve holder 35, and the sleeve cap 3
A hydraulic oil passage 37 is bored between the valve holder 4 and the valve holder 35, and a discharge valve 38 is interposed in the hydraulic oil passage 37 while being held by the valve holder 35.
A bypass passage 39 is provided inside the pump base 30 and the valve holder 35 to bypass the discharge valve 38 before and after the discharge valve 38, and both ends thereof are connected to the hydraulic oil passage 37. This bypass flow path 3
A ball valve 40 is bored in 9, and the head of the valve operating screw 41 is made to protrude to the side of the pump base 30.
次に上記ガス噴射弁駆動用の作動油制御装置の
運転方法について説明する。 Next, a method of operating the hydraulic oil control device for driving the gas injection valve will be described.
先ず作動油ポンプ８において作動油を例えば数
百Kg／cm2に昇圧し、この作動油を作動油流路３７
から第１配管２３を通してガス噴射弁１のピスト
ン室５に供給する。そうすると針弁４は作動油の
圧力によつてそのピストン部６が押圧され、バネ
１９に抗して上方へ、つまり燃料ガス流路３を開
く方向に移動することになる。これにより弁室２
６内の燃料ガスはノズル１３を介して燃料室内に
噴射されることになる。そして作動油ポンプ８の
吸い戻し作用によりピストン室５内の作動油が吸
い戻されると、ピストン室５の圧力が下がつて針
弁４がバネ１９によつて下方へ、つまり燃料ガス
流路３を閉じる方向に移動し、燃料ガスの噴射が
止められることになる。ところで上記運転に際し
ては作動油ポンプ８のボールバルブ４０を閉にす
ると共に、第２通路９の切換弁１２を閉にし、作
動油は作動油排出流路２２から第２配管２４内に
導いておく。そうすると作動油は所定の圧力でリ
リーフ弁１１を介してドレンタンク１０へとリリ
ーフされるので、これにより第２通路９内の最高
圧力が規制されることになる。つまり供給された
作動油は徐々にドレンタンク１０へと排出されて
行くので、同じ作動油が第１通路７内を往復動し
て温度が上昇するというようなことはなく、ベー
パロツクの発生が未然に防止されることになる。
またガス噴射弁１の運転中に作動油に燃料ガスが
混入するようなことがあつても、該燃料ガスは第
２通路９を通して作動油と共に連続的に抜き取ら
れることになる。 First, the pressure of the hydraulic oil is increased to, for example, several hundred kg/cm 2 in the hydraulic oil pump 8, and this hydraulic oil is passed through the hydraulic oil flow path 37.
The gas is supplied from the gas through the first pipe 23 to the piston chamber 5 of the gas injection valve 1 . Then, the piston portion 6 of the needle valve 4 is pressed by the pressure of the hydraulic oil, and moves upward against the spring 19, that is, in the direction of opening the fuel gas passage 3. As a result, the valve chamber 2
The fuel gas in the fuel chamber 6 is injected into the fuel chamber through the nozzle 13. When the hydraulic oil in the piston chamber 5 is sucked back by the suction action of the hydraulic oil pump 8, the pressure in the piston chamber 5 decreases and the needle valve 4 is moved downward by the spring 19, that is, the fuel gas flow path 3 moves in the direction of closing, and fuel gas injection is stopped. By the way, during the above operation, the ball valve 40 of the hydraulic oil pump 8 is closed, the switching valve 12 of the second passage 9 is closed, and the hydraulic oil is guided from the hydraulic oil discharge passage 22 into the second pipe 24. . Then, the hydraulic oil is relieved to the drain tank 10 via the relief valve 11 at a predetermined pressure, so that the maximum pressure in the second passage 9 is regulated. In other words, since the supplied hydraulic oil is gradually discharged to the drain tank 10, the same hydraulic oil does not reciprocate in the first passage 7 and its temperature rises, preventing the occurrence of vapor lock. This will be prevented.
Furthermore, even if fuel gas were to mix into the hydraulic oil during operation of the gas injection valve 1, the fuel gas would be continuously extracted together with the hydraulic oil through the second passage 9.
ところで第１あるいは第２の配管２３，２４の
取換え工事後や長期間使用しなかつた後などの運
転前には、第１及び第２通路７，９内のガス（空
気）抜きを行う必要があるが、このような場合は
次の手順で行う。つまり作動油ポンプ８のボール
バルブ４０を開にすると共に、第２通路９の切換
弁１２を開にし、図外の作動油供給ポンプで数
Kg／cm2に昇圧した作動油を作動油ポンプ８の作動
油注入口３６に注入する。そうするとこの作動油
はシリンダ室３２から作動油流路３７に入つた
後、バイパス流路３９を通つて吐出弁３８の前後
をバイパスし、その後、第１通路７からガス噴射
弁１のピストン室５へと通されることになる。ま
たピストン室５に入つた作動油は作動油排出流路
２２から第２配管２４を通り、切換弁１２を介し
てドレンタンク１０に至ることになる。これによ
り第１及び第２通路７，９内のガスは作動油と共
にドレンタンク１０へと排出されることになる。
ガス抜きを行う際の圧力は高圧よりも上記のよう
に低圧の方が有利であることは一般に知られてお
り、上記のように低圧方式で行うと、略完全なガ
ス抜きが可能となる。 By the way, before operation after replacing the first or second piping 23, 24 or after not using it for a long period of time, it is necessary to vent the gas (air) in the first and second passages 7, 9. However, in such a case, follow the steps below. In other words, open the ball valve 40 of the hydraulic oil pump 8, open the switching valve 12 of the second passage 9, and use the hydraulic oil supply pump (not shown) to
Hydraulic oil pressurized to Kg/cm 2 is injected into the hydraulic oil inlet 36 of the hydraulic oil pump 8. Then, this hydraulic oil enters the hydraulic oil passage 37 from the cylinder chamber 32, passes through the bypass passage 39, bypasses the front and back of the discharge valve 38, and then passes through the first passage 7 to the piston chamber 5 of the gas injection valve 1. will be passed to. Further, the hydraulic oil that has entered the piston chamber 5 passes through the second pipe 24 from the hydraulic oil discharge passage 22 and reaches the drain tank 10 via the switching valve 12. As a result, the gas in the first and second passages 7 and 9 is discharged to the drain tank 10 together with the hydraulic oil.
It is generally known that low pressure is more advantageous when degassing than high pressure, and when degassing is performed using the low pressure method as described above, almost complete degassing is possible.
なお上記実施例におては、第２通路９にリリー
フ弁１１と切換弁１２とを並列に介設する例を挙
げたが、リリーフ量の調整がいらない場合には上
記リリーフ弁１１に代えてオリフイスを用いても
よい。 In the above embodiment, the relief valve 11 and the switching valve 12 are provided in parallel in the second passage 9, but if the relief amount does not need to be adjusted, the relief valve 11 may be replaced with the switching valve 12. An orifice may also be used.
第２図、第３図は上記ガス噴射弁１を複数個配
置した場合の例を示している。この場合は、第２
図に示すようにリリーフ弁１１を１個だけ使用
し、両ガス噴射弁１，１の共用としてもよいし、
第３図に示すように、各ガス噴射弁１，１に対応
して複数個配置するようにしてもよい。またこの
ようにガス噴射弁１を複数個使用する場合は、
各々の弁の啓開圧力の差などにより噴射がずれ、
燃焼悪化の原因となることがあるので、第３図に
示すように各ガス噴射弁１，１に対応して複数個
のリリーフ弁１１，１１を配置する構成である
と、各ガス噴射弁１，１の圧力調整が容易に行え
て便利である。なおこれら実施例における他の部
分の構成は上記第１実施例と同様であため同一部
分を同一の符号で示し、その説明を省略する。 FIGS. 2 and 3 show an example in which a plurality of the gas injection valves 1 are arranged. In this case, the second
As shown in the figure, only one relief valve 11 may be used and both gas injection valves 1, 1 may be used in common.
As shown in FIG. 3, a plurality of gas injection valves may be arranged corresponding to each gas injection valve 1, 1. In addition, when using multiple gas injection valves 1 in this way,
Injection may be deviated due to differences in opening pressure of each valve, etc.
Since this may cause deterioration of combustion, if a plurality of relief valves 11, 11 are arranged corresponding to each gas injection valve 1, as shown in FIG. , 1 can be easily adjusted for convenience. The configurations of other parts in these embodiments are the same as those in the first embodiment, so the same parts are designated by the same reference numerals, and the explanation thereof will be omitted.
（発明の効果）
この発明のガス噴射弁駆動用の作動油制御装置
によれば、ガス噴射弁のピストン室に、作動油を
供給する第１通路を接続する一方、作動油を排出
する第２通路を接続し、かつこの第２通路に流れ
抵抗を介設して上記ピストン室に供給された作動
油を所定の圧力でドレンタンクへと排出するよう
にしたので、作動油を徐々にドレンタンクへと排
出することができ、これにより作動油の温度上昇
を防いでベーパロツクの発生を未然に防止するこ
とができる。またガス噴射弁の運転中に作動油に
燃料ガスが混入するようなことがあつても該燃料
ガスは第２通路を通して作動油と共に連続的にか
つ容易に抜き取ることができる。(Effects of the Invention) According to the hydraulic oil control device for driving a gas injection valve of the present invention, the first passage for supplying hydraulic oil is connected to the piston chamber of the gas injection valve, and the second passage for discharging the hydraulic oil is connected to the piston chamber of the gas injection valve. The hydraulic oil supplied to the piston chamber is discharged into the drain tank at a predetermined pressure by connecting the passage and providing a flow resistance in the second passage, so that the hydraulic oil is gradually drained into the drain tank. This prevents the temperature of the hydraulic oil from rising and prevents vapor lock from occurring. Furthermore, even if fuel gas is mixed into the hydraulic oil during operation of the gas injection valve, the fuel gas can be continuously and easily extracted together with the hydraulic oil through the second passage.
第１図はこの発明のガス噴射弁駆動用の作動油
制御装置の一実施例を示す説明図、第２図、第３
図は第１図におけるガス噴射弁を複数個配置した
場合の例を示す説明図、第４図は従来のガス噴射
弁の一例を示す縦断面図である。
１……ガス噴射弁、２……弁本体、３……燃料
ガス流路、４……針弁、５……ピストン室、７…
…第１通路、８……作動油ポンプ、９……第２通
路、１０……ドレンタンク、１１……リリーフ
弁。
FIG. 1 is an explanatory diagram showing an embodiment of a hydraulic oil control device for driving a gas injection valve according to the present invention, FIG.
The figure is an explanatory view showing an example in which a plurality of gas injection valves in Fig. 1 are arranged, and Fig. 4 is a longitudinal sectional view showing an example of a conventional gas injection valve. DESCRIPTION OF SYMBOLS 1... Gas injection valve, 2... Valve body, 3... Fuel gas flow path, 4... Needle valve, 5... Piston chamber, 7...
...First passage, 8...Hydraulic oil pump, 9...Second passage, 10...Drain tank, 11...Relief valve.
Claims (1)
自在に配置されると共に、この針弁を作動させる
ためのピストン室を有するガス噴射弁と、上記ピ
ストン室に第１通路を介して接続され、該ピスト
ン室に作動油を供給する作動油ポンプと、上記ピ
ストン室に第２通路を介して接続されたドレンタ
ンクと、上記第２通路に介設された流れ抵抗とを
有することを特徴とするガス噴射弁駆動用の作動
油制御装置。1. A needle valve for opening and closing a fuel gas flow path is slidably disposed in the valve body, and a gas injection valve has a piston chamber for operating the needle valve, and a gas injection valve is connected to the piston chamber via a first passage. A hydraulic oil pump connected to the piston chamber to supply hydraulic oil to the piston chamber, a drain tank connected to the piston chamber via a second passage, and a flow resistance interposed in the second passage. Features: Hydraulic oil control device for driving gas injection valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60265703A JPS62126259A (en) | 1985-11-26 | 1985-11-26 | Control device for working fluid driving gas injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60265703A JPS62126259A (en) | 1985-11-26 | 1985-11-26 | Control device for working fluid driving gas injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62126259A JPS62126259A (en) | 1987-06-08 |
| JPH0467021B2 true JPH0467021B2 (en) | 1992-10-27 |
Family
ID=17420833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60265703A Granted JPS62126259A (en) | 1985-11-26 | 1985-11-26 | Control device for working fluid driving gas injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62126259A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010032761A1 (en) | 2008-09-22 | 2010-03-25 | ダイキン工業株式会社 | Power converter, manufacturing method thereof and direct matrix converter |
| WO2012043465A1 (en) | 2010-09-30 | 2012-04-05 | ダイキン工業株式会社 | Method for measuring link voltage |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2534217Y2 (en) * | 1990-03-08 | 1997-04-30 | ミツミ電機株式会社 | DC-DC converter |
| CA2204983A1 (en) * | 1997-05-09 | 1998-11-09 | Westport Research Inc. | Hydraulically actuated gaseous or dual fuel injector |
-
1985
- 1985-11-26 JP JP60265703A patent/JPS62126259A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010032761A1 (en) | 2008-09-22 | 2010-03-25 | ダイキン工業株式会社 | Power converter, manufacturing method thereof and direct matrix converter |
| JP4488122B2 (en) * | 2008-09-22 | 2010-06-23 | ダイキン工業株式会社 | Power converter, control method therefor, and direct matrix converter |
| WO2012043465A1 (en) | 2010-09-30 | 2012-04-05 | ダイキン工業株式会社 | Method for measuring link voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62126259A (en) | 1987-06-08 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |