JPH09280116A - Fuel/water injection device - Google Patents
Fuel/water injection deviceInfo
- Publication number
- JPH09280116A JPH09280116A JP8113144A JP11314496A JPH09280116A JP H09280116 A JPH09280116 A JP H09280116A JP 8113144 A JP8113144 A JP 8113144A JP 11314496 A JP11314496 A JP 11314496A JP H09280116 A JPH09280116 A JP H09280116A
- Authority
- JP
- Japan
- Prior art keywords
- high pressure
- water
- fuel
- fuel passage
- pressure fuel
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＮＯx を低減させる
燃料・水噴射ディーゼル機関に関する。TECHNICAL FIELD The present invention relates to a fuel / water injection diesel engine that reduces NO x .
【０００２】[0002]
【従来の技術】先ず最も一般的な第１従来例の燃料・水
噴射装置について説明する。図５は従来型水噴射装置、
図６はその特性線図を示す。高圧ポンプ１０からの燃料
は、吐出弁１４を経て高圧通路１２をとおり、噴射ノズ
ル２０から内燃機関の燃焼室内に噴射され燃焼する。2. Description of the Related Art First, the most general first conventional fuel / water injection device will be described. FIG. 5 shows a conventional water jet device,
FIG. 6 shows the characteristic diagram. The fuel from the high-pressure pump 10 passes through the discharge valve 14, passes through the high-pressure passage 12, and is injected from the injection nozzle 20 into the combustion chamber of the internal combustion engine for combustion.
【０００３】ここで噴射ノズル２０はばね２２で開弁圧
が設定された針弁２１を持つ自動弁で構成されている。
燃料の燃焼時にＮＯx の発生を低く抑えるため、図示し
ない水圧ポンプで噴射ノズル２０の開弁圧よりも低い圧
力まで圧力を高めた水３０が、高圧ポンプ１０が作動し
ていない期間に電磁弁３１を開くことにより、逆止弁３
２をへて高圧燃料通路１２の水注入点４０から高圧燃料
通路１２内へ逆流して注入されている。Here, the injection nozzle 20 is composed of an automatic valve having a needle valve 21 whose valve opening pressure is set by a spring 22.
In order to suppress the generation of NO x at the time of combustion of fuel to a low level, the water 30 whose pressure is raised to a pressure lower than the valve opening pressure of the injection nozzle 20 by a water pressure pump (not shown) is a solenoid valve while the high pressure pump 10 is not operating. Check valve 3 by opening 31
The water is injected from the water injection point 40 of the high-pressure fuel passage 12 back into the high-pressure fuel passage 12 through the line 2.
【０００４】このとき水注入点４０から噴射ノズル２０
側の高圧燃料通路４１は行き止まりのため、水は高圧ポ
ンプ１０方向へ流入する。この水流入によって押しのけ
られた燃料は高圧燃料通路１２の高圧ポンプ１０側に設
けられた逆止弁１３から、高圧ポンプ１０をへて給油路
１１へ戻る。ここで逆止弁１３はばね１５をもち、噴射
ノズル２０の開弁圧力よりも低い圧力で開弁するように
なっている。水が所要量流入した時点で電磁弁３１が閉
じ水の流入が停止される。At this time, from the water injection point 40 to the injection nozzle 20
Since the high pressure fuel passage 41 on the side is a dead end, water flows into the high pressure pump 10. The fuel displaced by this water inflow returns from the check valve 13 provided on the high pressure pump 10 side of the high pressure fuel passage 12 to the oil supply passage 11 via the high pressure pump 10. Here, the check valve 13 has a spring 15 and opens at a pressure lower than the valve opening pressure of the injection nozzle 20. When the required amount of water has flown in, the solenoid valve 31 is closed and the inflow of water is stopped.
【０００５】次のサイクルで高圧ポンプ１０が作動し、
燃料が吐出弁１４、高圧燃料通路１２をへて噴射ノズル
２０から噴射されると、高圧燃料路１２の途中には水が
注入されているため、図６のような噴射となる。即ち最
初に、水注入点４０から下流の高圧燃料通路４１内の燃
料が、図６のＡのように噴射され、続いて注入された水
がＢのように噴射された後で、再び高圧燃料通路１２の
燃料Ｃが噴射される。この結果燃焼室への燃料噴射の途
中で水が加えられるため、燃焼温度が低下しＮＯx の発
生が低く抑えられる。In the next cycle, the high pressure pump 10 operates,
When fuel is injected from the injection nozzle 20 through the discharge valve 14 and the high-pressure fuel passage 12, water is injected in the middle of the high-pressure fuel passage 12, resulting in the injection shown in FIG. That is, first, the fuel in the high pressure fuel passage 41 downstream from the water injection point 40 is injected as shown in A of FIG. 6, and subsequently the injected water is injected as shown in B, and then the high pressure fuel is again supplied. The fuel C in the passage 12 is injected. Since the results middle water injection into the combustion chamber is applied, the occurrence of the combustion temperature decreases NO x is kept low.
【０００６】[0006]
【発明が解決しようとする課題】ところが、前記従来例
では、燃料噴射の途中で水だけの期間Ｂが生ずるため、
ＮＯx をさらに下げる目的で水の注入量を増加していく
と、燃焼室内の燃焼が一旦とぎれるようになり、燃焼が
不安定となり、内燃機関自体の回転も不安定になる。こ
のため、水の注入量に限界があり、ＮＯx も一定値以下
に低下させることはできない。However, in the above-mentioned conventional example, since the period B of only water occurs during fuel injection,
When the injection amount of water is increased for the purpose of further reducing NO x , the combustion in the combustion chamber is once interrupted, the combustion becomes unstable, and the rotation of the internal combustion engine itself also becomes unstable. Therefore, there is a limit to the amount of water that can be injected, and NO x cannot be reduced below a certain value.
【０００７】次に第２従来例（実開平５−１２６５８）
はエマルジョン燃料を混合する混合手段と、噴射ポンプ
と噴射ノズルとの噴射管に設けられフリーピストンが嵌
挿されたフリーピストン部と、混合手段から送られるエ
マルジョン燃料をフリーピストン部に逆止弁を介して供
給するエマルジョン燃料供給手段とを具備したので、エ
マルジョン燃料の分離による始動不良を防止し、噴射系
部品の耐久性の低下を防止するにある。Next, the second conventional example (actual Kaihei 5-1658)
Is a mixing means for mixing the emulsion fuel, a free piston portion provided in the injection pipe of the injection pump and the injection nozzle and fitted with a free piston, and a check valve for the emulsion fuel sent from the mixing means in the free piston portion. Since it is provided with the emulsion fuel supply means to be supplied via the above, it is intended to prevent the starting failure due to the separation of the emulsion fuel and to prevent the deterioration of the durability of the injection system parts.
【０００８】さらに第３従来例（実開平５−１２６５
９）は第１燃料タンクに溜められる第１の燃料及び第２
の燃料の燃料タンクに溜められる第２の燃料を混合して
エマルジョン燃料を混合する混合手段と、この混合手段
から送られるエマルジョン燃料を噴射ポンプと噴射ノズ
ルとの間の噴射管に逆止弁を介して供給するエマルジョ
ン燃料供給手段とを具備したので、エマルジョン燃料の
分離による始動不良を防止し、噴射系部品の耐久性の低
下を防止できる。Furthermore, a third conventional example (actually open flat 5-1265)
9) is the first fuel and the second fuel stored in the first fuel tank
A mixing means for mixing the second fuel stored in the fuel tank of the above fuel and the emulsion fuel, and a check valve for the emulsion fuel sent from the mixing means in the injection pipe between the injection pump and the injection nozzle. Since it is provided with the emulsion fuel supply means to be supplied via the above, it is possible to prevent the starting failure due to the separation of the emulsion fuel and to prevent the deterioration of the durability of the injection system parts.
【０００９】本発明の目的は前記従来装置の問題点を解
消し、水噴射中も燃焼を継続するのに必要最小限の燃料
Ｅが確保され、燃焼がとぎれることなく安定した機関性
能が確保できる燃料・水噴射装置を提供することにあ
る。The object of the present invention is to solve the problems of the conventional device, to secure the minimum amount of fuel E necessary for continuing combustion even during water injection, and to ensure stable engine performance without interruption of combustion. To provide a fuel / water injection device.
【００１０】[0010]
【課題を解決するための手段】第１発明の燃料・水噴射
装置は、燃料を圧送する高圧ポンプ１０と、該高圧ポン
プの出口に該高圧ポンプから噴射ノズルへ向かう流れの
みを通す吐出弁１４と該吐出弁と並列に前記噴射ノズル
から前記高圧ポンプへ向かう流れのみを通す逆止弁１３
とが設けられ前記吐出弁と前記逆止弁とのあと合流して
噴射ノズル２０へ連結された高圧燃料通路１２と、該高
圧燃料が作用してない期間に水を注入する水圧装置から
の水配管との接続点４０を有する燃料・水噴射装置にお
いて、前記高圧ポンプの出口に高圧燃料通路１２とは並
列に燃料の逆流を防ぐ逆止弁１４０を途中に持つ新設高
圧燃料通路１２０を設け、該新設高圧燃料通路と高圧燃
料通路１２の合流点４００が高圧燃料通路と水配管との
接続点４０を含みその下流位置に設けられたことを特徴
とする。A fuel / water injection device according to a first aspect of the present invention comprises a high-pressure pump 10 for pumping fuel, and a discharge valve 14 for passing only a flow from the high-pressure pump to an injection nozzle at an outlet of the high-pressure pump. And a check valve 13 that allows only the flow from the injection nozzle to the high-pressure pump in parallel with the discharge valve.
And a high-pressure fuel passage 12 that joins after the discharge valve and the check valve and is connected to the injection nozzle 20, and water from a hydraulic device that injects water while the high-pressure fuel is not operating. In the fuel / water injection device having a connection point 40 with a pipe, a new high-pressure fuel passage 120 having a check valve 140 for preventing backflow of fuel is provided in parallel with the high-pressure fuel passage 12 at the outlet of the high-pressure pump. The confluence point 400 between the new high-pressure fuel passage and the high-pressure fuel passage 12 is provided at a position downstream of the high-pressure fuel passage including the connection point 40 between the high-pressure fuel passage and the water pipe.
【００１１】第２発明の燃料・水噴射弁は、燃料を圧送
する高圧ポンプ１０と、該高圧ポンプの出口に該高圧ポ
ンプから噴射ノズルへ向かう流れのみを通す吐出弁１４
と該吐出弁と並列に前記噴射ノズルから前記高圧ポンプ
へ向かう流れのみを通す逆止弁１３とが設けられ前記吐
出弁と前記逆止弁とのあと合流して噴射ノズル２０へ連
結された高圧燃料通路１２と、該高圧燃料が作用してな
い期間に水を注入する水圧装置からの水配管との接続点
４０を有する燃料・水噴射装置において、前記高圧ポン
プの出口に高圧燃料通路１２とは並列に燃料の逆流を防
ぐ逆止弁１４０を途中に持つ新設高圧燃料通路１２０を
設け、該新設高圧燃料通路と高圧燃料通路１２の合流点
４１０が高圧燃料通路と水配管との接続点４０の上流位
置に設けられたことを特徴とする。The fuel / water injection valve of the second invention comprises a high-pressure pump 10 for pumping fuel, and a discharge valve 14 for passing only the flow from the high-pressure pump to the injection nozzle at the outlet of the high-pressure pump.
And a check valve 13 for passing only the flow from the injection nozzle to the high-pressure pump in parallel with the discharge valve, and the high-pressure valve connected to the injection nozzle 20 after joining the discharge valve and the check valve. A fuel / water injection device having a connection point 40 between a fuel passage 12 and a water pipe from a hydraulic device for injecting water while the high-pressure fuel is not operating, wherein a high-pressure fuel passage 12 is provided at an outlet of the high-pressure pump. Is provided in parallel with a new high-pressure fuel passage 120 having a check valve 140 for preventing backflow of fuel in the middle thereof, and a confluence point 410 between the new high-pressure fuel passage and the high-pressure fuel passage 12 is a connection point 40 between the high-pressure fuel passage and the water pipe. It is characterized in that it is provided in the upstream position.
【００１２】[0012]
【作用】高圧ポンプ１０が作動していない時に電磁弁３
１が解放されると加圧された水が必ず注入点４０から高
圧噴射管１２内に流入する。該注入点４０の下流には注
水圧より高い開弁圧の噴射ノズル２０を有し、先止りと
なっているので注水はこの方向には流れない。しかし高
圧ポンプ１０側への管路１２の先には逆止弁１３が設け
られているので、前記加圧水は高圧ポンプへの流れのみ
を通す逆止弁１３を押し開きその逆止弁１３のある管路
１２中のみに水が注入される。Operation The solenoid valve 3 when the high-pressure pump 10 is not operating
When 1 is released, pressurized water always flows from the injection point 40 into the high pressure injection pipe 12. The injection nozzle 20 having a valve opening pressure higher than the water injection pressure is provided downstream of the injection point 40, and since the injection nozzle 20 is at the beginning, water injection does not flow in this direction. However, since the check valve 13 is provided at the tip of the conduit 12 to the high pressure pump 10, the pressurized water pushes the check valve 13 through which only the flow of the pressurized water flows to the high pressure pump, and the check valve 13 is provided. Water is injected only into the conduit 12.
【００１３】次に高圧ポンプが作動し燃料を吐出すると
両方の吐出弁１４，１４０が押し開かれる。噴射ノズル
からは最初管路１２中が燃料のみの部分４１が噴射され
次いで管路１２，１２０中の水と燃料とが同時に噴射さ
れ水部分の噴射が終了すると次に燃料のみが燃焼室に噴
射される。このように水のみ噴射される期間を第１発明
のように短縮するか第２発明のように零にすることによ
り水と燃料とを同時に噴射でき燃焼が安定し、かつＮＯ
x の低減を大きくすることができる。Next, when the high pressure pump operates to discharge the fuel, both discharge valves 14 and 140 are pushed open. From the injection nozzle, first, the fuel-only portion 41 in the conduit 12 is injected, then the water and fuel in the conduits 12 and 120 are simultaneously injected, and when the injection of the water portion ends, then only the fuel is injected into the combustion chamber. To be done. In this way, by shortening the period in which only water is injected as in the first aspect of the invention, or by making it zero as in the second aspect of the invention, water and fuel can be injected at the same time, combustion is stabilized, and NO
The reduction of x can be increased.
【００１４】[0014]
【発明の実施形態】以下図１〜図４を参照して本発明の
第１実施形態、第２実施形態について説明する。まず、
第１実施形態について説明する。図１は第１実施形態の
全体図、図２は同噴射ノズルの噴射特性図である。１０
は高圧ポンプで燃料は図示しない給油ポンプから燃料入
り口１１へ供給される。１４は高圧ポンプから噴射ノズ
ルへ向かう流れのみを許容する吐出弁、１３は噴射ノズ
ルから高圧ポンプへの流れを許容する逆止弁で１５はそ
の開弁圧設定ばねである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The first and second embodiments of the present invention will be described below with reference to FIGS. First,
A first embodiment will be described. FIG. 1 is an overall view of the first embodiment, and FIG. 2 is an injection characteristic diagram of the injection nozzle. 10
Is a high-pressure pump, and fuel is supplied to the fuel inlet 11 from a fuel pump (not shown). Reference numeral 14 is a discharge valve that allows only the flow from the high-pressure pump to the injection nozzle, 13 is a check valve that allows the flow from the injection nozzle to the high-pressure pump, and 15 is a valve opening pressure setting spring thereof.
【００１５】逆止弁１３、吐出弁１４からの油路は合流
して高圧燃料通路１２に接続され、さらに高圧燃料通路
４１から噴射ノズル２０につながっている。２１は噴射
ノズル本体で、２２は噴射ノズルの開弁圧設定ばねであ
る。The oil passages from the check valve 13 and the discharge valve 14 join together and are connected to the high pressure fuel passage 12, and are further connected from the high pressure fuel passage 41 to the injection nozzle 20. Reference numeral 21 is an injection nozzle body, and 22 is a valve opening pressure setting spring of the injection nozzle.
【００１６】３０は図示しないポンプにより噴射ノズル
２０の開弁圧よりも低い圧力に加圧された水の供給管、
３１はその供給水を制御する電磁弁、３２は水の供給管
３０に設けられ高圧燃料通路方向への流れのみを許容す
る逆止弁、４０は水の供給管３０と高圧燃料油路１２と
が合流する水注入点である。１２０は新設高圧燃料通
路、１４０は前記の逆止弁１３および吐出弁１４とは並
列に設けられた新設高圧燃料通路１２０の途中にあり高
圧ポンプ１０から噴射ノズル２０への流れを許容する逆
止弁である。４００は両方の高圧燃料通路の合流点で本
図では水注入点４０を含みその下流に位置している。Reference numeral 30 denotes a water supply pipe pressurized by a pump (not shown) to a pressure lower than the valve opening pressure of the injection nozzle 20,
Reference numeral 31 is an electromagnetic valve for controlling the supplied water, 32 is a check valve provided in the water supply pipe 30 and allows only the flow in the direction of the high pressure fuel passage, 40 is the water supply pipe 30 and the high pressure fuel oil passage 12. Is the water injection point where 120 is a new high-pressure fuel passage, 140 is a midway of the new high-pressure fuel passage 120 that is provided in parallel with the check valve 13 and the discharge valve 14, and is a check valve that allows the flow from the high-pressure pump 10 to the injection nozzle 20. It is a valve. Reference numeral 400 denotes a confluence point of both high-pressure fuel passages, which includes a water injection point 40 in this drawing and is located downstream thereof.
【００１７】第１実施形態の作用について説明する。高
圧ポンプ１０が作動していない期間に水注入点４０から
水が注入されると、水は高圧燃料油路１２にのみ注入さ
れる。次に機関運転中高圧ポンプ１０が作動すると図２
に示すように燃料と水とが噴射される。すなわち従来例
と同様まず高圧燃料通路４１内の燃料がＡのように噴射
される。The operation of the first embodiment will be described. When water is injected from the water injection point 40 while the high pressure pump 10 is not operating, the water is injected only into the high pressure fuel oil passage 12. Next, when the high-pressure pump 10 operates during engine operation, FIG.
Fuel and water are injected as shown in FIG. That is, as in the conventional example, first, the fuel in the high-pressure fuel passage 41 is injected like A.
【００１８】次に水注入点４０よりも上流の高圧燃料通
路１２内の水と新設高圧燃料通路１２０内の燃料とはと
もに図２のＤ，Ｅのようにそれぞれ噴射される。注入さ
れた水の噴射が全部終了した後は、従来例と同様図２の
Ｃのように燃料のみ噴射される。従って従来例のように
水のみが噴射される期間がなくなり、水噴射時にも燃焼
を継続するのに必要最小限の燃料Ｅが確保されるので、
燃焼がとぎれることなく安定した機関の作動が確保でき
る。高圧燃料通路の合流点４００は水注入点４０と同じ
位置でも良い。Next, the water in the high-pressure fuel passage 12 upstream of the water injection point 40 and the fuel in the new high-pressure fuel passage 120 are both injected as indicated by D and E in FIG. After the injection of all the injected water is completed, only the fuel is injected as in C of FIG. Therefore, unlike the conventional example, the period in which only water is injected disappears, and the minimum amount of fuel E required to continue combustion even during water injection is secured,
It is possible to ensure stable operation of the engine without interruption of combustion. The confluence point 400 of the high-pressure fuel passage may be at the same position as the water injection point 40.
【００１９】次に第２実施形態について説明する。図３
は第２実施形態の全体図、図４は第２実施形態の噴射ノ
ズルの噴射特性図である。構成部材は第１実施形態と同
じであるので説明を省略する。ただ高圧燃料通路１２と
新設高圧燃料通路１２０との合流点４１０が水注入点４
０よりも上流にある点で第１実施形態とは異なる。Next, a second embodiment will be described. FIG.
Is an overall view of the second embodiment, and FIG. 4 is an injection characteristic diagram of the injection nozzle of the second embodiment. Since the constituent members are the same as those in the first embodiment, the description thereof will be omitted. However, the confluence point 410 between the high-pressure fuel passage 12 and the new high-pressure fuel passage 120 is the water injection point 4.
It is different from the first embodiment in that it is located upstream of 0.
【００２０】次にその作用について説明する。高圧ポン
プ１０が作動していない期間に水注入点４０から水が注
入されると、水注入点４０から高圧燃料通路の合流点４
１０までは水のみとなりさらに高圧燃料通路１２内に水
が注入される。Next, the operation will be described. When water is injected from the water injection point 40 while the high-pressure pump 10 is not operating, the confluence point 4 of the high-pressure fuel passage from the water injection point 40
Up to 10, only water remains, and water is further injected into the high pressure fuel passage 12.
【００２１】次に高圧ポンプ１０が作動すると図４に示
すように燃料と水とが噴射される。まず高圧燃料通路４
１内の燃料Ａが噴射され次に水注入点４０から高圧燃料
通路合流点４１０までの水のみＢが噴射されその後高圧
燃料通路１２内の水と新設高圧燃料通路１２０内の燃料
がＤ，Ｅのように噴射され最後に燃料Ｃが噴射される。
ここでＢとして水のみが噴射されるがその量はそれほど
多いものではなく燃焼をとぎれさせることなくＮＯx の
低減に効果が得られる程度に設定される。Next, when the high pressure pump 10 operates, fuel and water are injected as shown in FIG. First, the high-pressure fuel passage 4
The fuel A in 1 is injected, and then only the water B from the water injection point 40 to the confluence point 410 of the high-pressure fuel passage is injected, and then the water in the high-pressure fuel passage 12 and the fuel in the new high-pressure fuel passage 120 are D and E. And the fuel C is finally injected.
Here, only water is injected as B, but the amount thereof is not so large and is set to such an extent that NOx can be reduced without interrupting combustion.
【００２２】[0022]
【発明の効果】本発明の燃料・水噴射装置では水噴射中
でも燃焼を継続するのに必要最小限の燃料Ｅが確保さ
れ、燃焼がとぎれることなく安定した機関の作動が確保
でき、その結果水の注入量を従来の限界値よりも増大さ
せることができ、ＮＯx の排出量を低減させることが出
来る。With the fuel / water injection device of the present invention, the minimum amount of fuel E required to continue combustion even during water injection is ensured, and stable operation of the engine can be ensured without interruption of combustion. The injection amount of NOx can be increased more than the conventional limit value, and the NOx emission amount can be reduced.
【図１】本発明の第１実施形態の全体図、FIG. 1 is an overall view of a first embodiment of the present invention,
【図２】図１の噴射ノズルの特性図、2 is a characteristic diagram of the injection nozzle of FIG.
【図３】本発明の第２実施形態の全体図、FIG. 3 is an overall view of a second embodiment of the present invention,
【図４】図３の噴射ノズルの特性図、FIG. 4 is a characteristic diagram of the injection nozzle of FIG.
【図５】従来技術の全体図、FIG. 5 is an overall view of a conventional technique,
【図６】従来技術の噴射ノズルの特性図。FIG. 6 is a characteristic diagram of a conventional injection nozzle.
１０…高圧ポンプ、１２…高圧燃料通路、１３…逆止
弁、１４…吐出弁、１４０…吐出弁、１２０…新設高圧
燃料通路、１５…ばね、２０…噴射ノズル、２１…燃料
ノズル本体、２２…ばね、３０…水供給管、３１…電磁
弁、３２…逆止弁、４０…水注入点、４００，４１０…
高圧燃料通路合流点、Ａ，Ｃ，Ｅ…燃料、Ｂ，Ｄ…水。10 ... High pressure pump, 12 ... High pressure fuel passage, 13 ... Check valve, 14 ... Discharge valve, 140 ... Discharge valve, 120 ... New high pressure fuel passage, 15 ... Spring, 20 ... Injection nozzle, 21 ... Fuel nozzle main body, 22 ... Spring, 30 ... Water supply pipe, 31 ... Electromagnetic valve, 32 ... Check valve, 40 ... Water injection point, 400, 410 ...
High-pressure fuel passage confluence, A, C, E ... Fuel, B, D ... Water.
Claims (2)
上記高圧ポンプの出口に上記高圧ポンプから噴射ノズル
（２０）へ向かう流れのみを通す吐出弁（１４）と上記
吐出弁と並列に上記噴射ノズルから上記高圧ポンプへ向
かう流れのみを通す逆止弁（１３）とが設けられ上記吐
出弁（１４）と上記逆止弁（１３）とのあと合流して上
記噴射ノズルへ連結された高圧燃料通路（１２）と、該
高圧燃料通路は高圧燃料が作用してない期間に水を注入
する水圧装置からの水配管との接続点（４０）を有する
燃料・水噴射装置において、 上記高圧ポンプ（１０）の出口に上記高圧燃料通路とは
並列に燃料の逆流を防ぐ逆止弁（１４０）を途中に持つ
新設高圧燃料通路（１２０）を設け、上記新設高圧燃料
通路と高圧燃料通路の合流点（４００）が上記高圧燃料
通路と上記水配管との接続点（４０）を含み、その下流
位置に設けられたことを特徴とする燃料・水噴射装置。1. A high-pressure pump (10) for pumping fuel,
A discharge valve (14) that allows only the flow from the high pressure pump to the injection nozzle (20) to pass through the outlet of the high pressure pump, and a check valve that allows only the flow from the injection nozzle to the high pressure pump to flow in parallel with the discharge valve ( And a high pressure fuel passage (12), which is connected to the injection nozzle by merging after the discharge valve (14) and the check valve (13), and high pressure fuel acts on the high pressure fuel passage. In a fuel / water injection device having a connection point (40) with a water pipe from a water pressure device for injecting water during a period of time when the fuel is not supplied, the outlet of the high pressure pump (10) is connected with the high pressure fuel passage in parallel with the fuel pipe. A new high pressure fuel passage (120) having a check valve (140) for preventing backflow is provided, and a confluence point (400) between the new high pressure fuel passage and the high pressure fuel passage connects the high pressure fuel passage and the water pipe. Including the point (40) , A fuel / water injection device provided at a position downstream thereof.
上記高圧ポンプの出口に上記高圧ポンプから噴射ノズル
（２０）へ向かう流れのみを通す吐出弁（１４）と上記
吐出弁と並列に上記噴射ノズルから上記高圧ポンプへ向
かう流れのみを通す逆止弁（１３）とが設けられ上記吐
出弁（１４）と上記逆止弁（１３）とのあと合流して上
記噴射ノズルへ連結された高圧燃料通路（１２）と、該
高圧燃料通路は高圧燃料が作用してない期間に水を注入
する水圧装置からの水配管との接続点（４０）を有する
燃料・水噴射装置において、 上記高圧ポンプ（１０）の出口に上記高圧燃料通路とは
並列に燃料の逆流を防ぐ逆止弁（１４０）を途中に持つ
新設高圧燃料通路（１２０）を設け、上記新設高圧燃料
通路と高圧燃料通路の合流点（４１０）が上記高圧燃料
通路と上記水配管との接続点（４０）の上流位置に設け
られたことを特徴とする燃料・水噴射弁。2. A high-pressure pump (10) for pumping fuel,
A discharge valve (14) that allows only the flow from the high pressure pump to the injection nozzle (20) to pass through the outlet of the high pressure pump, and a check valve that allows only the flow from the injection nozzle to the high pressure pump to flow in parallel with the discharge valve ( And a high pressure fuel passage (12), which is connected to the injection nozzle by merging after the discharge valve (14) and the check valve (13), and high pressure fuel acts on the high pressure fuel passage. In a fuel / water injection device having a connection point (40) with a water pipe from a water pressure device for injecting water during a period of time when the fuel is not supplied, the outlet of the high pressure pump (10) is connected with the high pressure fuel passage in parallel with the fuel pipe. A new high-pressure fuel passage (120) having a check valve (140) for preventing backflow is provided, and a confluence point (410) of the new high-pressure fuel passage and the high-pressure fuel passage connects the high-pressure fuel passage and the water pipe. Upstream of point (40) A fuel / water injection valve characterized by being provided in a position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11314496A JP3322563B2 (en) | 1996-04-10 | 1996-04-10 | Fuel / water injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11314496A JP3322563B2 (en) | 1996-04-10 | 1996-04-10 | Fuel / water injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09280116A true JPH09280116A (en) | 1997-10-28 |
| JP3322563B2 JP3322563B2 (en) | 2002-09-09 |
Family
ID=14604693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11314496A Expired - Lifetime JP3322563B2 (en) | 1996-04-10 | 1996-04-10 | Fuel / water injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3322563B2 (en) |
-
1996
- 1996-04-10 JP JP11314496A patent/JP3322563B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3322563B2 (en) | 2002-09-09 |
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