JPH0681743A - Fuel injection device for internal combustion engine - Google Patents
Fuel injection device for internal combustion engineInfo
- Publication number
- JPH0681743A JPH0681743A JP4253524A JP25352492A JPH0681743A JP H0681743 A JPH0681743 A JP H0681743A JP 4253524 A JP4253524 A JP 4253524A JP 25352492 A JP25352492 A JP 25352492A JP H0681743 A JPH0681743 A JP H0681743A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- water
- valve
- injection
- fuel injection
- 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
Landscapes
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内燃機関特にディーゼル
機関の燃料噴射装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection device for an internal combustion engine, especially for a diesel engine.
【０００２】[0002]
【従来の技術】図５は１個の燃料弁から燃料と水を噴射
する２流体燃料噴射装置の１例を示す構成図である。デ
ィーゼル機関は圧縮比が大きく熱効率が高いことから各
方面の原動機として用いられるが、その排気成分には有
害なＣＯ, ＣＯ2 , ＨＣ, ＮＯX 等を多量に含むことか
ら、これらを低減することが大きな課題となっている。
ここではＮＯX の低減に効果のある燃焼室への水噴射を
行なう従来形２流体噴射装置について述べる。図は１つ
の燃料弁１１１により燃料と水を同時に噴射するように
発明されたシステムの１例を示す。2. Description of the Related Art FIG. 5 is a block diagram showing an example of a two-fluid fuel injection device for injecting fuel and water from one fuel valve. A diesel engine is used as a prime mover in various fields due to its large compression ratio and high thermal efficiency, but its exhaust components contain a large amount of harmful CO, CO 2 , HC, NO x, etc. Is a big issue.
Here, a conventional two-fluid injection device for injecting water into a combustion chamber, which is effective in reducing NO X , will be described. The figure shows one example of a system invented to inject fuel and water simultaneously with one fuel valve 111.
【０００３】図５において１は燃料弁本体、２はノズル
チップ、３は噴口、４は燃料入口金物、５は燃料弁内燃
料油路、６は押え金物内燃料油路、７はノズルチップ内
燃料油路、８は針弁サック部、９は針弁、１０は針弁ば
ね受、１１は針弁ばね、１２は針弁開弁圧調整金物、１
３は水注入金物、１４は注水逆止弁、１５は逆止弁ば
ね、１６は本体内水路、１７は押え金物内水路、１８は
ノズルチップ内水路、２２は燃料供給ポンプ、２３は燃
料噴射ポンプ、２４はバレル、２５はプランジャ、２６
は吐出弁、２７は等圧弁、２８は水タンク、２９は水供
給ポンプ、３０は水供給管、３１は電磁弁、３２は水注
入管、３３は電磁弁３１を制御するコントローラを示
す。In FIG. 5, 1 is a fuel valve main body, 2 is a nozzle tip, 3 is an injection port, 4 is a fuel inlet metal fitting, 5 is a fuel oil passage in a fuel valve, 6 is a fuel oil passage in a presser metal fitting, and 7 is a nozzle tip. Fuel oil passage, 8 needle valve sack portion, 9 needle valve, 10 needle valve spring bearing, 11 needle valve spring, 12 needle valve opening pressure adjustment metal fitting, 1
3 is a water injection metal fitting, 14 is a water injection check valve, 15 is a check valve spring, 16 is a water channel in the main body, 17 is a water channel in the holding metal, 18 is a water channel in the nozzle tip, 22 is a fuel supply pump, and 23 is a fuel injection. Pump, 24 barrel, 25 plunger, 26
Is a discharge valve, 27 is a pressure equalizing valve, 28 is a water tank, 29 is a water supply pump, 30 is a water supply pipe, 31 is a solenoid valve, 32 is a water injection pipe, and 33 is a controller for controlling the solenoid valve 31.
【０００４】次に従来例の作動について説明する。燃料
タンク２１から燃料供給ポンプ２２を介して燃料噴射ポ
ンプ２３に供給された燃料は、プランジャ２５で圧縮さ
れ、高圧となって吐出弁２６を押し開き、噴射管を経て
燃料弁へ送られる。燃料弁内油路５、押え金物内油路
６、ノズルチップ内油路７から針弁サック部８へ導かれ
た高圧の燃料は、針弁ばね１１の力に打ち勝ち針弁９を
押し開け噴孔３から噴射される。この燃料弁１１１では
燃料の外に、燃料の噴射時期以外の時期に水を針弁サッ
ク部８及び、ノズルチップ内油路７に混合させ、燃料と
水を同時に噴射させる。次に水の混入方法について述べ
ると、噴射の終了した針弁サック部８及びそれにつなが
る油路、噴射弁内の水路は燃料噴射ポンプ２３の等圧弁
２７を介して規定された残留圧力ＰR に保持されてい
る。一方タンク２８内の水は、水供給ポンプ２９により
先述の残留圧力ＰR より高い圧力に昇圧されており、燃
料噴射終了後から次の燃料噴射の時期までの間の所定の
時期に電磁弁３１がコントローラを介して開弁される。
また注水される水量は、電磁弁３１により開弁期間を変
えることにより可能である。そのとき適時適量に燃料弁
の針弁サック部８に圧送された水は、燃料噴射ポンプの
等圧弁２７を押し開き、燃料油路７、６、５を逆流して
燃料内に適時注入される。次に燃料噴射ポンプの圧送時
期になると針弁９を押し開け、ノズル噴孔３から噴射さ
れる。しかし該噴射時には逆止弁４は閉じ、燃料が水の
供給系へ逆流しないようになっている。更に、水注入時
には、図４に示すように必要負荷に相当する燃料の噴射
量を確保するため、水を注入するときにはラック駆動装
置３４により、燃料噴射ポンプのラックを注水量だけ押
し込みプランジャ２５の有効ストロークを増大するよう
に制御している。Next, the operation of the conventional example will be described. The fuel supplied from the fuel tank 21 to the fuel injection pump 23 via the fuel supply pump 22 is compressed by the plunger 25, becomes a high pressure, opens the discharge valve 26, and is sent to the fuel valve via the injection pipe. The high-pressure fuel introduced from the oil passage 5 in the fuel valve, the oil passage 6 in the presser piece, and the oil passage 7 in the nozzle tip to the needle valve sack portion 8 overcomes the force of the needle valve spring 11 and pushes the needle valve 9 open. It is ejected from the hole 3. In the fuel valve 111, water is mixed with the needle valve sack portion 8 and the oil passage 7 in the nozzle tip at a time other than the fuel injection timing, and the fuel and the water are simultaneously injected. Next, a method of mixing water will be described. The needle valve sack portion 8 after injection, the oil passage connected to the needle valve sack portion 8 and the water passage in the injection valve have a residual pressure P R defined by the equal pressure valve 27 of the fuel injection pump 23. Is held. On the other hand, the water in the tank 28 is raised to a pressure higher than the above-mentioned residual pressure P R by the water supply pump 29, and the solenoid valve 31 is provided at a predetermined time between the end of fuel injection and the next fuel injection. Is opened via the controller.
The amount of water to be injected can be changed by changing the valve opening period with the solenoid valve 31. At that time, the water pressure-fed to the needle valve sack portion 8 of the fuel valve pushes open the equal pressure valve 27 of the fuel injection pump, flows backward through the fuel oil passages 7, 6 and 5, and is injected into the fuel at a proper time. . Next, at the timing of pressure-feeding the fuel injection pump, the needle valve 9 is pushed open to inject from the nozzle injection hole 3. However, at the time of the injection, the check valve 4 is closed so that the fuel does not flow back to the water supply system. Further, at the time of water injection, as shown in FIG. 4, in order to secure the injection amount of fuel corresponding to the required load, when injecting water, the rack of the fuel injection pump is pushed by the rack drive device 34 by the amount of water injection of the plunger 25. Control is performed so as to increase the effective stroke.
【０００５】[0005]
【発明が解決しようとする課題】しかし前記従来例で
は、次のような欠点がある。水注入運転を続け、水を消
費し切った場合、及び水注入用のポンプ２９あるいは、
電磁弁３１等の水供給系に作動不良が生じた場合等に
は、燃料弁１１１への水の供給が途絶えてしまうが、一
方燃料噴射ポンプ２３のラック位置は、水を注入してい
る位置にコントロールされているため有効ストロークが
大きく、所定の燃料量よりも、水注入分だけ多く（図４
の←→で示す）燃料を多く噴射してしまい、排気黒煙の
悪化等排ガス性能が悪化するだけでなく、高負荷運転時
には、過度の熱負荷によりエンジン自体が損傷を受ける
場合がある。However, the conventional example has the following drawbacks. When the water injection operation is continued and the water is completely consumed, and the water injection pump 29 or
When the water supply system such as the electromagnetic valve 31 malfunctions, the water supply to the fuel valve 111 is interrupted, but the rack position of the fuel injection pump 23 is the position where water is injected. The effective stroke is large because it is controlled to be more than the predetermined fuel amount by the water injection amount (Fig. 4).
(Indicated by ← →) A large amount of fuel is injected, which not only deteriorates exhaust gas performance such as deterioration of exhaust black smoke but also may cause damage to the engine itself due to excessive heat load during high load operation.
【０００６】本発明の目的は、２流体噴射装置におい
て、水タンクの水がなくなったり又は水供給系の故障で
燃料弁へ水の注入が正常に行われなくなったときに警報
を発すると共に、過負荷運転となってエンジントラブル
が発生するのを自動的に防止する内燃機関の燃料噴射装
置を提供するにある。An object of the present invention is to provide an alarm in a two-fluid injection device when a water tank runs out of water or a water supply system fails and water is not normally injected into a fuel valve. It is an object of the present invention to provide a fuel injection device for an internal combustion engine, which automatically prevents engine trouble from occurring under load operation.
【０００７】[0007]
【課題を解決するための手段】本発明に係る内燃機関の
燃料噴射装置は、等圧弁２７を有する燃料噴射ポンプ２
３と、燃料弁への給水を加圧する水供給ポンプ２９と、
該水ポンプ下流の給水路に設置されコントローラ３３を
介して適時開閉される電磁弁３１と、その下流に設けら
れた逆止弁１４とを用い、非燃料噴射時１個の燃料弁１
１１の前記逆止弁下流の水路１６, １８と該水路の下流
側に接続する燃料油路７, ６, ５へ前記等圧弁を押し開
き噴射燃料量に対応した加圧水が注水される水噴射ディ
ーゼル機関において；燃料弁内の燃料油路６に設けられ
た電極３５と、該電極を流れる電流の値が規定値以下と
なったときには前記コントローラを介して警報を発する
警報器３８と、さらに同コントローラを介して燃料噴射
ポンプラック位置を水を噴射しない時の設定位置まで戻
すラック駆動装置３４とを有してなることを特徴として
いる。A fuel injection device for an internal combustion engine according to the present invention includes a fuel injection pump 2 having an equal pressure valve 27.
3, and a water supply pump 29 for pressurizing the water supply to the fuel valve,
An electromagnetic valve 31 installed in a water supply passage downstream of the water pump and opened / closed at appropriate times via a controller 33 and a check valve 14 provided downstream thereof are used to provide one fuel valve 1 during non-fuel injection.
Water injection diesel in which the pressure equalizing water corresponding to the injection fuel amount is injected by pushing the equal pressure valve to the water passages 16 and 18 downstream of the check valve 11 and the fuel oil passages 7, 6 and 5 connected to the downstream side of the water passages. In the engine; an electrode 35 provided in the fuel oil passage 6 in the fuel valve, an alarm device 38 for issuing an alarm via the controller when the value of the current flowing through the electrode is below a specified value, and the controller And a rack drive device 34 for returning the fuel injection pump rack position to a set position when water is not injected through the rack drive device.
【０００８】[0008]
【実施例】次に本発明の一実施例について説明する。図
１を参照してまず従来と同様部分の燃料弁の構成につい
て説明する。図において、１１１は燃料弁、１は燃料弁
本体、２はノズルチップ、３は噴口、４は燃料入口金
物、５は本体内燃料油路、６は押え金物内燃料油路、７
はノズルチップ内燃料油路、８は針弁サック部、９は針
弁、１０は針弁ばね受、１１は針弁ばね、１２は開弁圧
力調整金物、１３は水注入金物、１４は注水逆止弁、１
５は逆止弁ばね、１６は本体内水路、１７は押え金物内
水路、１８はノズルチップ内水路であり、ノズルチップ
２内に穿設された燃料油路７と水路１８とは前記針弁サ
ック部８で合流している。Next, an embodiment of the present invention will be described. First, the structure of the fuel valve of the same portion as the conventional one will be described with reference to FIG. In the figure, 111 is a fuel valve, 1 is a fuel valve main body, 2 is a nozzle tip, 3 is an injection port, 4 is a fuel inlet metal fitting, 5 is a fuel oil passage in the main body, 6 is a fuel oil passage in a presser fitting, and 7
Is a fuel oil passage in the nozzle tip, 8 is a needle valve sack portion, 9 is a needle valve, 10 is a needle valve spring receiver, 11 is a needle valve spring, 12 is a valve opening pressure adjusting metal fitting, 13 is a water injection metal fitting, and 14 is water injection. Check valve, 1
Reference numeral 5 is a check valve spring, 16 is a water passage in the main body, 17 is a water passage in the presser foot, 18 is a water passage in the nozzle tip, and the fuel oil passage 7 and the water passage 18 formed in the nozzle tip 2 are the needle valve. They meet at the sack section 8.
【０００９】次に前述した燃料弁１１１に対する燃料及
び水の供給システムの構成について説明する。燃料供給
システムでは、２１は燃料タンク、２２は燃料供給ポン
プ、２３は燃料噴射ポンプの本体、２４はバレル、２５
はプランジャ、２６は吐出弁、２７は等圧弁であり、燃
料噴射ポンプの吐出弁２６出口と燃料弁側の燃料入口金
物４は燃料噴射管で接続されている。水供給システムで
は、２８は水タンク、２９は水供給ポンプ、３０は水供
給管、３１は電磁弁、３２は水注入管で前記燃料弁側の
水注入金物１３に接続されており、３３はコントローラ
で図示しない機関のクランク軸の回転と同期した信号を
入力して前記電磁弁３１の開弁時期及び開弁期間が制御
される。Next, the structure of the fuel and water supply system for the fuel valve 111 will be described. In the fuel supply system, 21 is a fuel tank, 22 is a fuel supply pump, 23 is a main body of a fuel injection pump, 24 is a barrel, 25
Is a plunger, 26 is a discharge valve, and 27 is a constant pressure valve. The outlet of the discharge valve 26 of the fuel injection pump and the fuel inlet metal 4 on the fuel valve side are connected by a fuel injection pipe. In the water supply system, 28 is a water tank, 29 is a water supply pump, 30 is a water supply pipe, 31 is a solenoid valve, 32 is a water injection pipe, which is connected to the water injection metal 13 on the fuel valve side, and 33 is A controller inputs a signal synchronized with the rotation of a crank shaft of an engine (not shown) to control the opening timing and opening period of the solenoid valve 31.
【００１０】次に前述した実施例の作用について説明す
る。燃料は燃料タンク２１から燃料供給ポンプ２２によ
り燃料噴射ポンプ２３に供給され、該噴射ポンプのバレ
ル２４内でプランジャ２５により高圧に圧縮され吐出弁
２６から吐出され噴射管を介して燃料弁１１１へ圧送さ
れる。高圧燃料は燃料弁１１１内に穿設された本体内油
路５と押え金物内油路６及びノズルチップ内油路７を経
て針弁サック部８に導かれ、その燃圧による力が針弁ば
ね１１のばね力に打勝つと針弁９が押上げられ噴口３か
ら燃料が噴射される。噴射終了後の針弁サック部８内及
び該部と連通する油路並びに水路は、前記燃料噴射ポン
プの吐出弁２６の側路に設けられた等圧弁２６によって
規定される残留圧力ＰR となっている。Next, the operation of the above-described embodiment will be described. Fuel is supplied from the fuel tank 21 to the fuel injection pump 23 by the fuel supply pump 22, compressed to a high pressure by the plunger 25 in the barrel 24 of the injection pump, discharged from the discharge valve 26, and pumped to the fuel valve 111 via the injection pipe. To be done. The high-pressure fuel is guided to the needle valve sack portion 8 via the main body oil passage 5 formed in the fuel valve 111, the presser foot inner oil passage 6 and the nozzle tip inner oil passage 7, and the force due to the fuel pressure is applied to the needle valve spring. When the spring force of 11 is overcome, the needle valve 9 is pushed up and fuel is injected from the injection port 3. After the injection is completed, the needle valve sac portion 8 and the oil passage and the water passage communicating with this portion have the residual pressure P R defined by the equal pressure valve 26 provided in the side passage of the discharge valve 26 of the fuel injection pump. ing.
【００１１】次に燃料弁１１１の水の供給及び同燃料弁
内での燃料と水の混合について説明する。ここで示した
燃料弁においては、燃料の噴射時期以外の時期に、針弁
サック部８及びノズルチップ内油路７に水を送出して燃
料と水を混合させて噴射させる。水タンク２８内の水は
水供給ポンプ２９により前記残留圧力ＰR より高圧の給
水圧力ＰS に昇圧されて水供給管３０に吐出されてい
る。コントローラ３３の制御で電磁弁３１が開弁する
と、前述の給水圧力ＰS の水は水注入管３２から水注入
金物１３を経て注水逆止弁１４を開弁して本体内水路１
６へ注入される。この際、注入される水量はコントロー
ラ３３により電磁弁３１の開弁時間を調整することによ
り最適に制御される。前述のようにして針弁サック部８
及びノズルチップ内油路７まで注入された水は前記燃料
油路を逆流し、燃料噴射時期に燃料噴射ポンプ２３から
吐出された燃料の高い燃圧により前記燃料及び水に伝え
られ、針弁９を押上げて噴口３からシリンダ内に噴射さ
れる。この際、注水逆止弁１４は閉弁され、燃料が水の
供給系へ逆流することはない。Next, the supply of water from the fuel valve 111 and the mixing of fuel and water in the fuel valve will be described. In the fuel valve shown here, water is sent to the needle valve sack portion 8 and the oil passage 7 in the nozzle tip at a timing other than the fuel injection timing to mix the fuel and water for injection. The water in the water tank 28 is boosted by the water supply pump 29 to a water supply pressure P S higher than the residual pressure P R and discharged to the water supply pipe 30. When the solenoid valve 31 is opened by the control of the controller 33, the water having the above-mentioned water supply pressure P S is opened from the water injection pipe 32 through the water injection metal 13 and the water injection check valve 14 to open the water passage 1 in the main body.
6 is injected. At this time, the amount of water to be injected is optimally controlled by adjusting the valve opening time of the solenoid valve 31 by the controller 33. As described above, the needle valve sack portion 8
And the water injected to the oil passage 7 in the nozzle tip flows backward through the fuel oil passage, and is transmitted to the fuel and water by the high fuel pressure of the fuel discharged from the fuel injection pump 23 at the fuel injection timing, and the needle valve 9 is turned on. It is pushed up and injected from the injection port 3 into the cylinder. At this time, the water injection check valve 14 is closed so that the fuel does not flow back to the water supply system.
【００１２】次に図１〜３を参照し本発明で特に追加さ
れた構成及び作用について説明する。燃料弁のノズルチ
ップ内の燃料油路７内に電極３５が設けられ、この電極
に電源３６と電流計３７が直列に配線され、電極３５を
流れる電流値が電流計３７を介してコントローラ３３に
伝えられる。機関が水注入運転を続け水を消費し切った
場合、又は水注入用ポンプ２９あるいは電磁弁３１等の
水供給系に作動不良が生じた場合には、燃料弁内燃料油
路に注入されるべき水がなくなる場合がある。Next, with reference to FIGS. 1 to 3, the configuration and operation particularly added in the present invention will be described. An electrode 35 is provided in the fuel oil passage 7 in the nozzle tip of the fuel valve, a power source 36 and an ammeter 37 are wired in series to this electrode, and the current value flowing through the electrode 35 is fed to the controller 33 via the ammeter 37. Reportedly. When the engine continues to inject water and runs out of water, or when a malfunction occurs in the water injection system such as the water injection pump 29 or the electromagnetic valve 31, the fuel is injected into the fuel oil passage in the fuel valve. There may be no water left.
【００１３】そこで、ここに電極３５を設け電圧をかけ
ておくと水がある場合には電流が流れるが、水が途切れ
油のみの場合は電流量は小さくなるので、これにより水
注入状態を検知することができる。図１は本発明の全体
構成図を、図２はノズル付近の詳細図を示し、３５は電
極、３６は電源、３７は電流計、３８は警報装置（警告
灯またはブザー）を示す。Therefore, if an electrode 35 is provided here and a voltage is applied, a current flows when water is present, but the current amount becomes small when the water is interrupted and only oil is present, so that the water injection state is detected. can do. FIG. 1 is an overall configuration diagram of the present invention, FIG. 2 is a detailed view of the vicinity of a nozzle, 35 is an electrode, 36 is a power source, 37 is an ammeter, and 38 is an alarm device (warning light or buzzer).
【００１４】前記構成において、水注入時には水の給水
圧力ＰS は燃料の残留圧力ＰR より高圧であるため、図
２（ａ）のように燃料路の破線の位置まで水が注入され
る。ところが何らかの要因により水が注入されなかった
場合は燃料油路は図２（ｂ）のように常に燃料のみとな
る。つまり水が注入されなくなると、電圧をかけても電
流はほとんど流れず、これにより水の供給状態をチェッ
クできる。水の供給が行われないと判断したときには、
ラック駆動装置３４により燃料噴射ポンプ２３のラック
位置を水の注入しない場合の位置（図４の破線）まで戻
すと共に、運転者に警告を発する。In the above structure, the water supply pressure P S is higher than the residual fuel pressure P R at the time of water injection, so that the water is injected to the position of the broken line of the fuel passage as shown in FIG. 2A. However, when water is not injected for some reason, the fuel oil passage is always fuel only as shown in FIG. 2 (b). In other words, when water is no longer injected, almost no current flows even if a voltage is applied, which makes it possible to check the water supply state. When it is determined that water will not be supplied,
The rack drive device 34 returns the rack position of the fuel injection pump 23 to the position where water is not injected (broken line in FIG. 4) and issues a warning to the driver.
【００１５】[0015]
【発明の効果】本発明は前記のとおり構成したので２流
体噴射装置において、水が水タンクになくなった場合又
は水供給系の作動不良により燃料弁１１１への水の注入
が正常に行われなくなった場合には警告を発して運転者
に以上のことを知らせると共に、過大な量の燃料の噴射
を自動的に防止することにより安定した良好な低ＮＯX
排ガスと低燃費を有する燃焼が得られ、エンジントラブ
ルを防止することができる。Since the present invention is configured as described above, in the two-fluid injection device, when water runs out in the water tank or due to a malfunction of the water supply system, water is not normally injected into the fuel valve 111. In this case, a warning is issued to inform the driver of the above and at the same time a stable and good low NO X is achieved by automatically preventing the injection of an excessive amount of fuel.
Combustion with exhaust gas and low fuel consumption can be obtained, and engine troubles can be prevented.
【図１】本発明の第１実施例に関わる燃料噴射装置の構
成図FIG. 1 is a configuration diagram of a fuel injection device according to a first embodiment of the present invention.
【図２】本発明の燃料弁ノズルチップ付近の詳細図FIG. 2 is a detailed view of the vicinity of the fuel valve nozzle tip of the present invention.
【図３】コントローラ３３の作用説明図FIG. 3 is an operation explanatory view of the controller 33.
【図４】２流体噴射装置の負荷とラック位置の関係図FIG. 4 is a diagram showing the relationship between the load of the two-fluid ejecting apparatus and the rack position.
【図５】従来例の図１応当図[Fig. 5] Fig. 1 corresponding diagram of the conventional example
２…ノズルチップ、３…噴孔、８…針弁サック部、９…
針弁、３３…コントローラ、３４…ラック駆動装置、３
５…電極、３６…電源、３７…電流計。2 ... Nozzle tip, 3 ... Injection hole, 8 ... Needle valve sack portion, 9 ...
Needle valve, 33 ... Controller, 34 ... Rack drive device, 3
5 ... Electrode, 36 ... Power supply, 37 ... Ammeter.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中川 洋 長崎県長崎市深堀町５丁目717番１号 三 菱重工業株式会社長崎研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Nakagawa 5717-1 Fukahori-cho, Nagasaki-shi, Nagasaki Sanryo Heavy Industries Ltd. Nagasaki Research Institute
Claims (1)
（２３）と、燃料弁への給水を加圧する水供給ポンプ
（２９）と、該水ポンプ下流の給水路に設置されコント
ローラ（３３）を介して適時開閉される電磁弁（３１）
と、その下流に設けられた逆止弁（１４）とを用い、非
燃料噴射時１個の燃料弁（１１１）の前記逆止弁下流の
水路（１６）（１８）と該水路の下流側に接続する燃料
油路（７）（６）（５）へ前記等圧弁を押し開き噴射燃
料量に対応した加圧水が注水される水噴射ディーゼル機
関において；燃料弁内の燃料油路（６）に設けられた電
極（３５）と、該電極を流れる電流の値が規定値以下と
なったときには前記コントローラを介して警報を発する
警報器（３８）と、さらに同コントローラを介して燃料
噴射ポンプラック位置を水を噴射しないときの設定位置
まで戻すラック駆動装置（３４）とを有してなる内燃機
関の燃料噴射装置。1. A fuel injection pump (23) having an equal pressure valve (27), a water supply pump (29) for pressurizing water supply to the fuel valve, and a controller (33) installed in a water supply passage downstream of the water pump. Solenoid valve (31) that is opened / closed at appropriate times via
And a check valve (14) provided downstream of the check valve (14), the water passages (16) (18) downstream of the check valve of one fuel valve (111) at the time of non-fuel injection, and the downstream side of the water passage. In a water injection diesel engine in which the pressure equalizing valve is pushed to the fuel oil passages (7), (6) and (5) connected to, and pressurized water corresponding to the injected fuel amount is injected; to the fuel oil passage (6) in the fuel valve An electrode (35) provided, an alarm device (38) for issuing an alarm via the controller when the value of the current flowing through the electrode falls below a specified value, and a fuel injection pump rack position via the controller. A fuel injection device for an internal combustion engine, comprising: a rack drive device (34) for returning the engine to a set position when not injecting water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253524A JP2955133B2 (en) | 1992-08-31 | 1992-08-31 | Fuel injection device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253524A JP2955133B2 (en) | 1992-08-31 | 1992-08-31 | Fuel injection device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0681743A true JPH0681743A (en) | 1994-03-22 |
| JP2955133B2 JP2955133B2 (en) | 1999-10-04 |
Family
ID=17252570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4253524A Expired - Lifetime JP2955133B2 (en) | 1992-08-31 | 1992-08-31 | Fuel injection device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2955133B2 (en) |
-
1992
- 1992-08-31 JP JP4253524A patent/JP2955133B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2955133B2 (en) | 1999-10-04 |
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