JPH05312117A - Fuel injection device of diesel engine - Google Patents
Fuel injection device of diesel engineInfo
- Publication number
- JPH05312117A JPH05312117A JP4102234A JP10223492A JPH05312117A JP H05312117 A JPH05312117 A JP H05312117A JP 4102234 A JP4102234 A JP 4102234A JP 10223492 A JP10223492 A JP 10223492A JP H05312117 A JPH05312117 A JP H05312117A
- Authority
- JP
- Japan
- Prior art keywords
- water
- fuel
- valve
- fuel injection
- pump
- 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
- 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
Landscapes
- 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】本発明はディーゼル機関の燃料噴
射装置に関する。FIELD OF THE INVENTION The present invention relates to a fuel injection device for a diesel engine.
【０００２】[0002]
【従来の技術】従来の燃料と水とを１個の燃料弁から噴
射する燃料噴射装置（以下２流体噴射装置と呼ぶ）の１
例を図５によって説明する。図５は従来の燃料と水とを
１個の燃料弁から噴射する装置の説明図である。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広く各
方面に原動機として用いられているが、その排気成分に
は有害なＣＯ，ＣＯ2 ，ＨＣ，ＮＯX 等を多量に含有す
ることからこれ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
射を行う従来形２流体噴射装置について記す。図におい
て１は燃料弁本体、２はノズルチップ、３は噴孔、４は
燃料入口金物で前記は公知のものである。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は針弁の開弁圧力調整金
物で針弁ばね１１の取付け長さを変えることにより針弁
９の開弁圧力を調節する。2. Description of the Related Art One of conventional fuel injection devices (hereinafter referred to as two-fluid injection device) for injecting fuel and water from one fuel valve.
An example will be described with reference to FIG. FIG. 5 is an explanatory view of a conventional device for injecting fuel and water from one fuel valve. A diesel engine is widely used as a prime mover in various fields due to its large compression ratio and high thermal efficiency, but its exhaust gas component contains a large amount of harmful CO, CO 2 , HC, NO x, etc. Reduction is a major 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. In the figure, 1 is a fuel valve main body, 2 is a nozzle tip, 3 is an injection hole, 4 is a fuel inlet metal member, which is well known. 5 is the fuel oil passage in the fuel valve, 6 is the fuel oil passage in the presser foot, 7 is the fuel oil passage in the nozzle tip, 8 is the needle valve sack portion, 9 is the needle valve, 10 is the needle valve spring bearing, and 11 is the needle valve. A spring 12 is a valve-opening pressure adjusting hardware for the needle valve, and adjusts the valve-opening pressure of the needle valve 9 by changing the mounting length of the needle valve spring 11.
【０００３】１３は水注水金物、１４はボール式逆止
弁、１５は逆止弁ばね、１６は燃料弁内水路、１７は押
え金物内水路、１８はノズルチップ内水路である。ノズ
ルチップ内燃料油路７とノズルチップ内水路１８は針弁
サック部８で合流している。次に他の燃料システム構成
について記す。２３は燃料噴射ポンプ、２１は燃料タン
ク、２２は燃料供給ポンプで吸入口が燃料タンク２１
に、吐出口が燃料噴射ポンプ２３に接続されている。２
４はプランジャバレル、２５はプランジャ、２６は吐出
弁、２７は等圧弁で何れも燃料噴射ポンプ２３の要素で
ある。燃料噴射ポンプ２３の吐出部と燃料入口金物４は
噴射管によって接続されている。Reference numeral 13 is a water injection metal fitting, 14 is a ball type check valve, 15 is a check valve spring, 16 is a fuel valve inner water passage, 17 is a presser foot inner water passage, and 18 is a nozzle tip inner water passage. The fuel oil passage 7 in the nozzle tip and the water passage 18 in the nozzle tip merge at the needle valve sack portion 8. Next, other fuel system configurations will be described. 23 is a fuel injection pump, 21 is a fuel tank, 22 is a fuel supply pump, and the suction port is the fuel tank 21.
The discharge port is connected to the fuel injection pump 23. Two
Reference numeral 4 is a plunger barrel, 25 is a plunger, 26 is a discharge valve, and 27 is an equal pressure valve, all of which are elements of the fuel injection pump 23. The discharge part of the fuel injection pump 23 and the fuel inlet metal fitting 4 are connected by an injection pipe.
【０００４】２８は水タンク、２９は水供給ポンプ、３
０は水供給管、３１は電磁弁、３２は水管で電磁弁３１
と水注水金物１３を接続している。３３はコントローラ
で電磁弁３１等を制御するコントローラで図示しない機
関のクランク軸と同期した信号により弁開時期と開弁期
間を制御する。３４はラック駆動装置でコントローラ３
３に接続されて居り燃料噴射ポンプ２３の図示しないラ
ックを動かす。28 is a water tank, 29 is a water supply pump, 3
0 is a water supply pipe, 31 is a solenoid valve, 32 is a water pipe, and a solenoid valve 31
And the water injection metal fitting 13 are connected. A controller 33 controls the solenoid valve 31 and the like, and controls a valve opening timing and a valve opening period by a signal synchronized with a crank shaft of an engine (not shown). Reference numeral 34 is a rack drive device
3, the rack of the fuel injection pump 23 (not shown) is moved.
【０００５】前記従来例の作用を説明する。燃料のみを
噴射するときは燃料タンク２１に貯えられている燃料を
燃料供給ポンプ２２で汲み上げ燃料噴射ポンプ２３に供
給する。燃料噴射ポンプ２３はバレル２４内に供給され
た燃料油をプランジヤ２５で押して吐出弁２６を押し開
き噴射管を経て燃料入口金物４から燃料弁１１１に押し
込み、燃料弁内燃料油路５、押え金物内燃料油路６、ノ
ズルチップ内油路７を経て針弁サック部８へ押し込まれ
る。針弁サック部８内の圧力が針弁９に働きその圧力が
針弁ばね１１の力に勝つと針弁９を押し上げ噴孔３を開
いて噴孔３から噴射される。噴射が終った後は燃料弁１
１１から燃料噴射ポンプに至るすべての燃料油路及びこ
れに通ずる管路内は等圧弁２７によってきまる残留圧Ｐ
r に保たれる。The operation of the conventional example will be described. When only fuel is injected, the fuel stored in the fuel tank 21 is pumped up by the fuel supply pump 22 and supplied to the fuel injection pump 23. The fuel injection pump 23 pushes the fuel oil supplied into the barrel 24 with the plunger 25, pushes the discharge valve 26 open, and pushes it from the fuel inlet metal fitting 4 into the fuel valve 111 via the injection pipe, and the fuel oil passage 5 in the fuel valve, the presser metal fitting. It is pushed into the needle valve sack portion 8 via the inner fuel oil passage 6 and the nozzle tip inner oil passage 7. When the pressure in the needle valve sack portion 8 acts on the needle valve 9 and the pressure overcomes the force of the needle valve spring 11, the needle valve 9 is pushed up and the injection hole 3 is opened to be injected from the injection hole 3. Fuel valve 1 after injection is over
Residual pressure P determined by the equal pressure valve 27 in all fuel oil passages from 11 to the fuel injection pump and in the pipelines leading to them.
kept at r .
【０００６】前記燃料とともに水を噴射するときは水を
燃料弁１１１に注入する。このときは、水タンク２８内
の水を水ポンプ２９で汲み上げこれを等圧弁２７の開弁
圧より高い圧に昇圧している。燃料噴射と次の燃料噴射
の間の一定の時期にコントローラ３３の制御で電研弁３
１が或時間開かれ、水は前記時間中電磁弁３１から水管
３２、水注水金物１３をへてボール式逆止弁１４を開き
燃料弁内水路１６、押え金物内水路１７、ノズルチップ
内水路１８から針弁サック部８に至り、更に合流して燃
料油路に入り燃料油を押し出し注入される。従って水の
量によりノズルチップ内油路７から押え金物内油路６、
燃料弁内油路５へ等圧弁２７を開いて混入される。注入
される水の量はコントローラ３３による電磁弁３１の開
いている時間できめられる。前記各燃料油路へ混入され
た水は次の燃料噴射時に燃料とともに或は之に押されて
噴射される。ボール式逆止弁１４は逆流して燃料噴射圧
が前記水供給系統へ及ぶのを止める。水注入時にはその
ままでは水の分だけ燃料が減るので、コントラーラ３３
の制御によりラック駆動装置３４を介してラックを押し
こみ、水注入量分だけプランジャのストロークを増し燃
料噴射量の減少を補正する。前記ラックの位置は図２に
示す。図２において縦軸はラック位置、横軸はエンジン
負荷である。When water is injected together with the fuel, the water is injected into the fuel valve 111. At this time, the water in the water tank 28 is pumped up by the water pump 29 and is raised to a pressure higher than the valve opening pressure of the equal pressure valve 27. At a certain time between one fuel injection and the next fuel injection, the electroken valve 3 is controlled by the controller 33.
1 is opened for a certain period of time, water opens from the solenoid valve 31 through the water pipe 32 and the water injection metal fitting 13 to the ball check valve 14 to open the fuel valve internal water passage 16, the presser foot internal water passage 17, and the nozzle tip internal water passage. From 18 to the needle valve sack portion 8, they are further merged into the fuel oil passage and the fuel oil is pushed out and injected. Therefore, depending on the amount of water, from the oil passage 7 in the nozzle tip to the oil passage 6 in the holding metal object,
The equal pressure valve 27 is opened and mixed into the oil passage 5 in the fuel valve. The amount of water to be injected can be controlled by the controller 33 while the solenoid valve 31 is open. The water mixed in each of the fuel oil passages is injected with the fuel or while being pushed at the time of the next fuel injection. The ball check valve 14 flows backward to stop the fuel injection pressure from reaching the water supply system. When the water is injected, the fuel will be reduced by the amount of water as it is, so the Contrara 33
The control pushes the rack through the rack drive device 34 to increase the stroke of the plunger by the amount of water injection and correct the decrease in the amount of fuel injection. The position of the rack is shown in FIG. In FIG. 2, the vertical axis represents the rack position and the horizontal axis represents the engine load.
【０００７】[0007]
【発明が解決しようとする課題】前記従来例には次の欠
点がある。水噴射運転を続け水がなくなるか、或は水供
給系統に故障が起きて燃料弁への水の供給がとだえて
も、燃料噴射ポンプ２３のラック位置は水噴射運転時の
ままであるので水注入量分だけの燃料が加算されて噴射
される。従って燃料が多過ぎ排気色の悪化等排ガス特性
が悪化するばかりでなく、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。本発
明の目的は前記問題点を解消し、水の使い切り又は水供
給系統の故障により燃料弁へ水の注入が行われなかった
ときでも適正な燃料が噴射されるディーゼル機関の燃料
噴射装置を提供することである。The above-mentioned conventional example has the following drawbacks. Even if the water injection operation is continued and water runs out, or if a water supply system malfunctions and water supply to the fuel valve is stopped, the rack position of the fuel injection pump 23 remains the same during water injection operation. The fuel for the injection amount is added and injected. Therefore, not only the amount of fuel is excessive, but the exhaust gas characteristics such as the deterioration of exhaust color are deteriorated, and the engine itself may be damaged by excessive heat load during high load operation. An object of the present invention is to solve the above problems and provide a fuel injection device for a diesel engine in which proper fuel is injected even when water is not injected into a fuel valve due to exhaustion of water or failure of a water supply system. It is to be.
【０００８】[0008]
【課題を解決するための手段】第１の手段は水タンク内
に水量検知センサを設け水タンク内の水量が設定レベル
以下になると警報を発しコントローラにより水の供給を
停止すると共に、ラック駆動装置により燃料噴射ポンプ
のラック位置を水注入しない場合の位置に戻すことを特
徴とする。第２の手段は燃料弁の水供給路に圧力センサ
を設け、予め設定されている水注入時期の水路内の圧力
を検知しその時期の圧力が等圧弁の開弁圧力と水供給圧
との間の設定圧に満たない場合は警報を発するとともに
燃料噴射ポンプのラック位置を水を噴射しない場合の位
置に戻すようにコントロールすることを特徴とする。A first means is to provide a water amount detection sensor in a water tank, issue an alarm when the water amount in the water tank falls below a set level, and stop the water supply by a controller, and at the same time, a rack drive device. Is used to return the rack position of the fuel injection pump to the position where water is not injected. The second means is provided with a pressure sensor in the water supply passage of the fuel valve, detects the pressure in the water passage at a preset water injection timing, and detects the pressure at that timing as the opening pressure of the equal pressure valve and the water supply pressure. When the set pressure between the two is not reached, an alarm is issued and the rack position of the fuel injection pump is controlled to return to the position where water is not injected.
【０００９】[0009]
【作用】第１の手段によれば水タンク内の水が少くなっ
たとき水がなくなるまえには水の供給が停止され、燃料
噴射ポンプのラック位置が水噴射しない場合の位置へ戻
り燃料噴射量が適正な値となる。第２の手段によれば水
を使い切った場合、又は水注入系の作動不良により突発
的に燃料弁へ水の注入が行われなかった場合には、水路
内圧力の不足が水路内圧力センサで検出され即座に警報
が発せられるとともに燃料噴射ポンプのラックは水噴射
を行わない場合の位置に戻り、過大な量の燃料が噴射さ
れることがなくなる。According to the first means, when the water in the water tank becomes low, the water supply is stopped before the water runs out, and the rack position of the fuel injection pump returns to the position where water injection does not occur. The amount becomes an appropriate value. According to the second means, when the water is used up, or when water is not suddenly injected into the fuel valve due to a malfunction of the water injection system, the shortage of the pressure in the water channel is detected by the pressure sensor in the water channel. Upon detection, an alarm is immediately issued and the rack of the fuel injection pump returns to the position where water injection is not performed, so that an excessive amount of fuel is not injected.
【００１０】[0010]
【実施例】第１の実施例を図１〜２によって説明する。
図１は実施例の燃料噴射装置の構成図、図２は２流体噴
射時の負荷と燃料噴射ポンプのラック位置の関係を示す
図である。図において１は燃料弁本体、２はノズルチッ
プ、３は噴孔、４は燃料入口金物である。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で
針弁ばね１１の取付長を変える。１３は注水金物、１４
ボール式逆止弁、１５は逆止弁ばね、１６は燃料弁内水
路、１７は押え金物内水路、１８はノズルチップ内水路
であって何れも公知のものである。ノズルチップ内燃料
油路７とノズルチップ内水路１８は針弁サック部８で合
流している。２３は燃料噴射ポンプで下部は一部図示し
ていないがラックを具えている。２１は燃料タンクであ
る。２２は燃料供給ポンプで燃料タンク２１と燃料噴射
ポンプ２３の間に設けられている。２４はプランジャバ
レル、２５はプランジャでプランジヤバレル２４に嵌合
している。２６は吐出弁、２７は等圧弁で噴射ポンプ２
３の要素である。EXAMPLE A first example will be described with reference to FIGS.
FIG. 1 is a configuration diagram of a fuel injection device of an embodiment, and FIG. 2 is a diagram showing a relationship between a load and a rack position of a fuel injection pump at the time of two-fluid injection. In the figure, 1 is a fuel valve main body, 2 is a nozzle tip, 3 is an injection hole, and 4 is a fuel inlet metal fitting. 5 is the fuel oil passage in the fuel valve, 6 is the fuel oil passage in the presser foot, 7 is the fuel oil passage in the nozzle tip, 8 is the needle valve sack portion, 9 is the needle valve, 10 is the needle valve spring bearing, and 11 is the needle valve. A spring 12 is a needle valve opening pressure adjusting metal fitting, and changes the mounting length of the needle valve spring 11. 13 is a water injection metal fitting, 14
The ball type check valve, 15 is a check valve spring, 16 is a fuel valve internal water channel, 17 is a presser foot internal channel, and 18 is a nozzle tip internal channel, all of which are known. The fuel oil passage 7 in the nozzle tip and the water passage 18 in the nozzle tip merge at the needle valve sack portion 8. Reference numeral 23 denotes a fuel injection pump, which is provided with a rack although a lower part thereof is not shown. 21 is a fuel tank. A fuel supply pump 22 is provided between the fuel tank 21 and the fuel injection pump 23. A plunger barrel 24 and a plunger 25 are fitted in the plunger barrel 24. 26 is a discharge valve, 27 is an equal pressure valve, and the injection pump 2
It is an element of 3.
【００１１】燃料噴射ポンプ２３の吐出口は噴射管によ
り燃料入口金物４に接続されている。２８は水タンク、
２９は水供給ポンプ、３０は水供給管、３１は電磁弁で
水供給管３０により水供給ポンプ２９に接続されてい
る。３２は水管で電磁弁３１を注水金物１３に接続して
いる。３３はコントローラで電磁弁３１、ラック駆動装
置３４及び警報装置３６を制御する。３４はラック駆動
装置で燃料噴射ポンプ２３の図示しないラックを動か
す。３５は水タンク内水量検知センサでコントローラ３
３に接続され水タンク２８内の水面を検知する。実施例
はフロート式であるが他の方式でもよい。３６は警報装
置でコントローラ３３に接続されて居り図示のものはラ
ンプであるがブザー等でもよい。The discharge port of the fuel injection pump 23 is connected to the fuel inlet metal fitting 4 by an injection pipe. 28 is a water tank,
Reference numeral 29 is a water supply pump, 30 is a water supply pipe, and 31 is an electromagnetic valve, which is connected to the water supply pump 29 through the water supply pipe 30. A water pipe 32 connects the solenoid valve 31 to the water injection metal fitting 13. A controller 33 controls the solenoid valve 31, the rack drive device 34, and the alarm device 36. Reference numeral 34 denotes a rack driving device that moves a rack (not shown) of the fuel injection pump 23. Reference numeral 35 is a water amount detection sensor in the water tank for the controller 3
3 to detect the water surface in the water tank 28. Although the embodiment is of the float type, other types may be used. An alarm device 36 is connected to the controller 33, and a lamp is shown in the figure, but a buzzer or the like may be used.
【００１２】前記第１の実施例の作用を説明する。前記
実施の内の公知の要素の作用の説明は省く。水噴射で運
転中の水タンク２８内の水の量が少くなって設定レベル
以下になると、水タンク内水量検知センサ３５が之を検
知する。コントローラ３３は前記水量検知センサ３５の
検知事項に応じて電磁弁３１の動作を停止するとともに
ラック駆動装置３４を作動させて燃料噴射ポンプ２３の
図示しないラックの位置を水を注入しない場合の位置に
戻し運転負荷に応じた適正な燃料量を噴射するようにす
るとともに、警報装置３６を作動させて運転者に水量不
足を知らせる。The operation of the first embodiment will be described. A description of the functioning of the known elements of the implementation is omitted. When the amount of water in the water tank 28 that is being operated by water injection becomes small and falls below a set level, the water tank in-water amount detection sensor 35 detects this. The controller 33 stops the operation of the electromagnetic valve 31 in response to the detected matter of the water amount detection sensor 35 and operates the rack drive device 34 to set the position of the rack (not shown) of the fuel injection pump 23 to the position where water is not injected. An appropriate amount of fuel is injected according to the return operation load, and the alarm device 36 is activated to notify the driver of the water shortage.
【００１３】第２の実施例を図２〜４によって説明す
る。第２の実施例は前記第１の実施例の水タンク内水量
検知センサ３５を除きこれにかえて水供給路に水路内圧
力センサを設けたものでその他は同じであるので変更さ
れた部分のみ説明する。３７は水路内圧力センサで燃料
弁内水路１６に設けられコントローラ３３に接続されて
いる。前記第２の実施例の作用を前記第１実施例と変え
た部分のみについて説明する。水路内圧力センサ３７に
より設定された注水期間内の水路内の圧力を検知し、図
４に示すとおり前記検出圧力が等圧弁２７の開弁圧力と
水供給圧の間の設定圧力に満たないとき即ち燃料弁１１
１へ水が供給されなくなった場合には、コントローラ３
３が警報装置３６を介して警報を発せしめる。実施例で
はランプ点灯、とともにラック駆動装置３４を作動さ
せ、燃料噴射ポンプ２３のラックを図２に示すとおり水
を注入しない場合の位置に戻す。これによりシリンダ内
に過大な量の燃料の噴射を防止し負荷に応じた適正な量
の燃料噴射を行うことができる。A second embodiment will be described with reference to FIGS. The second embodiment is the same as the first embodiment except that the water tank internal water amount detection sensor 35 is provided and an internal water channel pressure sensor is provided in the water supply path. explain. A pressure sensor 37 in the water channel is provided in the water channel 16 in the fuel valve and is connected to the controller 33. Only the part of the operation of the second embodiment different from that of the first embodiment will be described. When the pressure in the water channel within the water injection period set by the water channel pressure sensor 37 is detected, and the detected pressure is less than the set pressure between the valve opening pressure of the equal pressure valve 27 and the water supply pressure as shown in FIG. That is, the fuel valve 11
When water is no longer supplied to 1, the controller 3
3 issues an alarm via the alarm device 36. In the embodiment, the lamp is turned on and the rack driving device 34 is operated to return the rack of the fuel injection pump 23 to the position where water is not injected as shown in FIG. As a result, it is possible to prevent an excessive amount of fuel from being injected into the cylinder and to inject an appropriate amount of fuel according to the load.
【００１４】[0014]
【発明の効果】本発明は前記のとおり構成される２流体
噴射装置において水タンク内の水が少くなった場合或は
水供給系の動作不良等により突発的に燃料噴射弁への水
注入が行われなくなった場合は、即座に警報を発して運
転者に異常を知らせ注意を促するとともに過大な量の燃
料の噴射を防止することができると共に、安定した良好
な低ＮＯX の排ガス特性と低燃費率特性を有した燃焼が
得られる。よって本発明は水の使い切り又は事故により
水注水が行われなくなったときでも適正な燃料が噴射さ
れるディーゼル機関の燃料噴射装置を提供できる。According to the present invention, in the two-fluid injection device configured as described above, water is suddenly injected into the fuel injection valve when the amount of water in the water tank becomes small or the water supply system malfunctions. If it is not performed, an alarm will be issued immediately to notify the driver of the abnormality to warn the driver and injection of an excessive amount of fuel can be prevented, and stable and good low NO x exhaust gas characteristics and Combustion with low fuel consumption characteristics is obtained. Therefore, the present invention can provide a fuel injection device for a diesel engine in which an appropriate fuel is injected even when water injection is stopped due to water exhaustion or an accident.
【図１】第１の実施例の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.
【図２】二流体噴射装置の負荷とラック位置の関係を示
す図。FIG. 2 is a diagram showing a relationship between a load of the two-fluid ejecting apparatus and a rack position.
【図３】第２の実施例の燃料噴射装置の構成図。FIG. 3 is a configuration diagram of a fuel injection device according to a second embodiment.
【図４】第２の実施例の水注入時期及び水路圧力検出期
間を示す図。FIG. 4 is a diagram showing a water injection timing and a waterway pressure detection period of the second embodiment.
【図５】従来の燃料噴射装置の構成図。FIG. 5 is a configuration diagram of a conventional fuel injection device.
１……燃料弁本体、１６……燃料弁内水路、２１……燃
料タンク ２３……燃料噴射ポンプ、２８……水タンク、３１……
電磁弁 ３３……コントローラ、３４……ラック駆動装置、３５
……水タンク内水量検知センサ、３６……警報装置、２
９……水ポンプ、２７……等圧弁、１１１……燃料弁。1 ... Fuel valve main body, 16 ... Fuel valve internal water channel, 21 ... Fuel tank 23 ... Fuel injection pump, 28 ... Water tank, 31 ...
Solenoid valve 33 ... Controller, 34 ... Rack drive device, 35
...... Water tank water quantity detection sensor, 36 …… Alarm device, 2
9 ... Water pump, 27 ... Isobaric valve, 111 ... Fuel valve.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年４月２２日[Submission date] April 22, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【請求項２】 等圧弁（２７）を有する燃料噴射ポンプ
（２３）と該ポンプの噴射管に水を供給する水ポンプ
（２９）と該水ポンプよりの水供給量をメタリングする
電磁弁（３１）よりなり前記水の供給量を加算して燃料
噴射ポンプのラック位置を設定し１個の噴射弁（１１
１）で燃料と水を同時にシリンダ内に噴射可能に構成し
たものにおいて、水供給路（１６）に設けた水路内圧力
センサ（３７）と、該水路内圧センサが作動したとき水
の供給を停止し且燃料噴射ポンプ（２３）のラックを水
噴射しない位置に戻すように制御するコントローラ（３
３）とを有してなるディーゼル機関の燃料噴射装置。 ─────────────────────────────────────────────────────
2. A fuel injection pump (23) having an equal pressure valve (27), a water pump (29) for supplying water to an injection pipe of the pump, and a solenoid valve (31) for metering the amount of water supplied from the water pump. ), The rack position of the fuel injection pump is set by adding the water supply amount, and one injection valve (11
In the structure in which the fuel and water can be simultaneously injected into the cylinder in 1), the water channel pressure sensor (37) provided in the water supply channel (16) and the water supply are stopped when the water channel pressure sensor operates. Moreover, a controller (3) for controlling the rack of the fuel injection pump (23) so as to return it to a position where water injection is not performed
3) A fuel injection device for a diesel engine, comprising: ─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年６月１０日[Submission date] June 10, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００２】[0002]
【従来の技術】従来の燃料と水とを１個の燃料弁から噴
射する燃料噴射装置（以下２流体噴射装置と呼ぶ）の１
例を図５によって説明する。図５は従来の燃料と水とを
１個の燃料弁から噴射する装置の説明図である。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広く各
方面に原動機として用いられているが、その排気成分に
は有害なＣＯ，ＣＯ２，ＨＣ，ＮＯｘ等を多量に含有す
ることからこれ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
射を行う従来形２流体噴射装置について記す。図におい
て１１１は燃料弁、２はノズルチップ、３は噴孔、４は
燃料入口金物で前記は公知のものである。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は針弁の開弁圧力調整金
物で針弁ばね１１の取付け長さを変えることにより針弁
９の開弁圧力を調節する。2. Description of the Related Art One of conventional fuel injection devices (hereinafter referred to as two-fluid injection device) for injecting fuel and water from one fuel valve.
An example will be described with reference to FIG. FIG. 5 is an explanatory view of a conventional device for injecting fuel and water from one fuel valve. A diesel engine is widely used as a prime mover in various fields because of its large compression ratio and high thermal efficiency, but its exhaust gas component contains a large amount of harmful CO, CO 2 , HC, NO x, etc. Reduction is a major 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. In the figure, 111 is a fuel valve , 2 is a nozzle tip, 3 is an injection hole, and 4 is a fuel inlet metal member, which is well known. 5 is the fuel oil passage in the fuel valve, 6 is the fuel oil passage in the presser foot, 7 is the fuel oil passage in the nozzle tip, 8 is the needle valve sack portion, 9 is the needle valve, 10 is the needle valve spring bearing, and 11 is the needle valve. A spring 12 is a valve-opening pressure adjusting hardware for the needle valve, and adjusts the valve-opening pressure of the needle valve 9 by changing the mounting length of the needle valve spring 11.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Correction target item name] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００５】前記従来例の作用を説明する。燃料のみを
噴射するときは燃料タンク２１に貯えられている燃料を
燃料供給ポンプ２２で汲み上げ燃料噴射ポンプ２３に供
給する。燃料噴射ポンプ２３はバレル２４内に供給され
た燃料油をプランジャ２５で押して吐出弁２６を押し開
き噴射管を経て燃料入口金物４から燃料弁１に押し込
み、燃料弁内燃料油路５、押え金物内燃料油路６、ノズ
ルチップ内油路７を経て針弁サック部８へ押し込まれ
る。針弁サック部８内の圧力が針弁９に働きその圧力が
針弁ばね１１の力に勝つと針弁９を押し上げ噴孔３を開
いて噴孔３から噴射される。噴射が終った後は燃料弁１
から燃料噴射ポンプに至るすべての燃料油路及びこれに
通ずる管路内は等圧弁２７によってきまる残留圧Ｐｘに
保たれる。The operation of the conventional example will be described. When only fuel is injected, the fuel stored in the fuel tank 21 is pumped up by the fuel supply pump 22 and supplied to the fuel injection pump 23. The fuel injection pump 23 pushes the fuel oil supplied into the barrel 24 with the plunger 25, pushes the discharge valve 26 open, pushes the fuel oil from the fuel inlet metal fitting 4 into the fuel valve 1 through the injection pipe, and the fuel oil passage 5 in the fuel valve, the presser metal fitting. It is pushed into the needle valve sack portion 8 via the inner fuel oil passage 6 and the nozzle tip inner oil passage 7. When the pressure in the needle valve sack portion 8 acts on the needle valve 9 and the pressure overcomes the force of the needle valve spring 11, the needle valve 9 is pushed up and the injection hole 3 is opened to be injected from the injection hole 3. Fuel valve 1 after injection is over
The residual pressure P x determined by the equal pressure valve 27 is maintained in all the fuel oil passages from the fuel injection pump to the fuel injection pump and in the pipelines leading to the fuel oil passages.
【手続補正４】[Procedure correction 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００６】前記燃料とともに水を噴射するときは水を
燃料弁１に注入する。このときは、水タンク２８内の水
を水ポンプ２９で汲み上げこれを等圧弁２７の開弁圧よ
り高い圧に昇圧している。燃料噴射と次の燃料噴射の間
の一定の時期にコントローラ３３の制御で電研弁３１が
或時間開かれ、水は前記時間中電磁弁３１から水管３
２、水注水金物１３をへてボール式逆止弁１４を開き燃
料弁内水路１６、押え金物内水路１７、ノズルチップ内
水路１８から針弁サック部８に至り、更に合流して燃料
油路に入り燃料油を押し出し注入される。従って水の量
によりノズルチップ内油路７から押え金物内油路６、燃
料弁内油路５へ等圧弁２７を開いて混入される。注入さ
れる水の量はコントローラ３３による電磁弁３１の開い
ている時間できめられる。前記各燃料油路へ混入された
水は次の燃料噴射時に燃料とともに或は之に押されて噴
射される。ボール式逆止弁１４は逆流して燃料噴射圧が
前記水供給系統へ及ぶのを止める。水注入時にはそのま
までは水の分だけ燃料が減るので、コントラーラ３３の
制御によりラック駆動装置３４を介してラックを押しこ
み、水注入量分だけプランジャのストロークを増し燃料
噴射量の減少を補正する。前記ラックの位置は図２に示
す。図２において縦軸はラック位置、横軸はエンジン負
荷である。When injecting water together with the fuel,
Inject into the fuel valve 1 . At this time, the water in the water tank 28 is pumped up by the water pump 29 and is raised to a pressure higher than the valve opening pressure of the equal pressure valve 27. At a certain time between one fuel injection and the next fuel injection, the electro-research valve 31 is opened for a certain time under the control of the controller 33, and the water flows from the electromagnetic valve 31 to the water pipe 3 during the time.
2. The ball check valve 14 is opened through the water injection metal fitting 13 to open the fuel valve internal water passage 16, the presser foot internal water passage 17, the nozzle tip internal water passage 18 to the needle valve sack portion 8 and join the fuel oil passage. Then, fuel oil is pushed out and injected. Therefore, depending on the amount of water, the equal pressure valve 27 is opened and mixed from the oil passage 7 in the nozzle tip to the oil passage 6 in the presser piece and the oil passage 5 in the fuel valve. The amount of water to be injected can be controlled by the controller 33 while the solenoid valve 31 is open. The water mixed in each of the fuel oil passages is injected with the fuel or while being pushed at the time of the next fuel injection. The ball check valve 14 flows backward to stop the fuel injection pressure from reaching the water supply system. Since the fuel is reduced by the amount of water when the water is injected as it is, the rack is pushed through the rack drive device 34 by the control of the controller 33, and the stroke of the plunger is increased by the amount of the injected water to correct the decrease in the fuel injection amount. The position of the rack is shown in FIG. In FIG. 2, the vertical axis represents the rack position and the horizontal axis represents the engine load.
【手続補正５】[Procedure amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１０】[0010]
【実施例】第１の実施例を図１〜２によって説明する。
図１は実施例の燃料噴射装置の構成図、図２は２流体噴
射時の負荷と燃料噴射ポンプのラック位置の関係を示す
図である。図において１は燃料弁、２はノズルチップ、
３は噴孔、４は燃料入口金物である。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で針弁
ばね１１の取付長を変える。１３は注水金物、１４ボー
ル式逆止弁、１５は逆止弁ばね、１６は燃料弁内水路、
１７は押え金物内水路、１８はノズルチップ内水路であ
って何れも公知のものである。ノズルチップ内燃料油路
７とノズルチップ内水路１８は針弁サック部８で合流し
ている。２３は燃料噴射ポンプで下部は一部図示してい
ないがラックを具えている。２１は燃料タンクである。
２２は燃料供給ポンプで燃料タンク２１と燃料噴射ポン
プ２３の間に設けられている。２４はプランジャバレ
ル、２５はプランジャでプランジヤバレル２４に嵌合し
ている。２６は吐出弁、２７は等圧弁で噴射ポンプ２３
の要素である。EXAMPLE A first example will be described with reference to FIGS.
FIG. 1 is a configuration diagram of a fuel injection device of an embodiment, and FIG. 2 is a diagram showing a relationship between a load and a rack position of a fuel injection pump at the time of two-fluid injection. In the figure, 1 is a fuel valve , 2 is a nozzle tip,
Reference numeral 3 is an injection hole, and 4 is a fuel inlet metal fitting. 5 is the fuel oil passage in the fuel valve, 6 is the fuel oil passage in the presser foot, 7 is the fuel oil passage in the nozzle tip, 8 is the needle valve sack portion, 9 is the needle valve, 10 is the needle valve spring bearing, and 11 is the needle valve. A spring 12 is a needle valve opening pressure adjusting metal fitting, and changes the mounting length of the needle valve spring 11. 13 is a water injection metal fitting, 14-ball type check valve, 15 is a check valve spring, 16 is a fuel valve water channel,
Reference numeral 17 is a presser foot water channel, and 18 is a nozzle tip water channel, both of which are known. The fuel oil passage 7 in the nozzle tip and the water passage 18 in the nozzle tip merge at the needle valve sack portion 8. Reference numeral 23 denotes a fuel injection pump, which is provided with a rack although a lower part thereof is not shown. 21 is a fuel tank.
A fuel supply pump 22 is provided between the fuel tank 21 and the fuel injection pump 23. A plunger barrel 24 and a plunger 25 are fitted in the plunger barrel 24. 26 is a discharge valve, 27 is an equal pressure valve, and the injection pump 23
Is an element of.
【手続補正６】[Procedure Amendment 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１３[Correction target item name] 0013
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１３】第２の実施例を図２〜４によって説明す
る。第２の実施例は前記第１の実施例の水タンク内水量
検知センサ３５を除きこれにかえて水供給路に水路内圧
力センサを設けたものでその他は同じであるので変更さ
れた部分のみ説明する。３７は水路内圧力センサで燃料
弁内水路１６に設けられコントローラ３３に接続されて
いる。前記第２の実施例の作用を前記第１実施例と変え
た部分のみについて説明する。水路内圧力センサ３７に
より設定された注水期間内の水路内の圧力を検知し、図
４に示すとおり前記検出圧力が等圧弁２７の開弁圧力と
水供給圧の間の設定圧力に満たないとき即ち燃料弁１へ
水が供給されなくなった場合には、コントローラ３３が
警報装置３６を介して警報を発せしめる。実施例ではラ
ンプ点灯、とともにラック駆動装置３４を作動させ、燃
料噴射ポンプ２３のラックを図２に示すとおり水を注入
しない場合の位置に戻す。これによりシリンダ内に過大
な量の燃料の噴射を防止し負荷に応じた適正な量の燃料
噴射を行うことができる。A second embodiment will be described with reference to FIGS. The second embodiment is the same as the first embodiment except that the water tank internal water amount detection sensor 35 is provided and an internal water channel pressure sensor is provided in the water supply path. explain. A pressure sensor 37 in the water channel is provided in the water channel 16 in the fuel valve and is connected to the controller 33. Only the part of the operation of the second embodiment different from that of the first embodiment will be described. When the pressure in the water channel within the water injection period set by the water channel pressure sensor 37 is detected, and the detected pressure is less than the set pressure between the valve opening pressure of the equal pressure valve 27 and the water supply pressure as shown in FIG. That is, when water is no longer supplied to the fuel valve 1 , the controller 33 issues an alarm via the alarm device 36. In the embodiment, the lamp is turned on and the rack driving device 34 is operated to return the rack of the fuel injection pump 23 to the position where water is not injected as shown in FIG. As a result, it is possible to prevent an excessive amount of fuel from being injected into the cylinder and to inject an appropriate amount of fuel according to the load.
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief explanation of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】第１の実施例の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.
【図２】二流体噴射装置の負荷とラック位置の関係を示
す図。FIG. 2 is a diagram showing a relationship between a load of the two-fluid ejecting apparatus and a rack position.
【図３】第２の実施例の燃料噴射装置の構成図。FIG. 3 is a configuration diagram of a fuel injection device according to a second embodiment.
【図４】第２の実施例の水注入時期及び水路圧力検出期
間を示す図。FIG. 4 is a diagram showing a water injection timing and a waterway pressure detection period of the second embodiment.
【図５】従来の燃料噴射装置の構成図。FIG. 5 is a configuration diagram of a conventional fuel injection device.
【符号の説明】１……燃料弁 、１６……燃料弁内水路、２１……燃料タ
ンク ２３……燃料噴射ポンプ、２８……水タンク、３１……
電磁弁 ３３……コントローラ、３４……ラック駆動装置、３５
……水タンク内水量検知センサ、３６……警報装置、２
９……水ポンプ、２７……等圧弁。[Explanation of Codes] 1 ... Fuel valve , 16 ... Water passage in fuel valve, 21 ... Fuel tank 23 ... Fuel injection pump, 28 ... Water tank, 31 ...
Solenoid valve 33 ... Controller, 34 ... Rack drive device, 35
...... Water tank water quantity detection sensor, 36 …… Alarm device, 2
9 ... Water pump, 27 ... Isobaric valve.
【手続補正８】[Procedure Amendment 8]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
【手続補正９】[Procedure Amendment 9]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図３[Name of item to be corrected] Figure 3
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図３】 [Figure 3]
Claims (2)
（２３）と該ポンプの噴射管に水を供給する水ポンプ
（２９）と該水ポンプよりの水供給量をメタリングする
電磁弁（３１）よりなり前記水の供給量を加算して燃料
噴射ポンプのラック位置を設定し１個の噴射弁（１１
１）で燃料と水を同時にシリンダ内に噴射可能に構成し
たものにおいて、水タンク（２８）の低いレベル位置に
設定された水量検知センサ（３５）と、該検知センサが
作動したとき水の供給を停止し且燃料噴射ポンプ（２
３）のラックを水噴射しない位置に戻すように制御する
コントローラ（３３）とを有してなるディーゼル機関の
燃料噴射装置。1. A fuel injection pump (23) having an equal pressure valve (27), a water pump (29) for supplying water to an injection pipe of the pump, and a solenoid valve (31) for metering a water supply amount from the water pump. ), The rack position of the fuel injection pump is set by adding the water supply amount, and one injection valve (11
In the structure in which fuel and water can be simultaneously injected into the cylinder in 1), a water amount detection sensor (35) set at a low level position of the water tank (28) and water supply when the detection sensor operates. Stop the fuel injection pump (2
A fuel injection device for a diesel engine, comprising a controller (33) for controlling the rack of 3) to return to a position where water is not injected.
所を水タンク（２８）の前記水量検知センサ（３５）よ
り水供給路（１６）に設けた水路内圧力センサ（３７）
に置き替えたことを特徴とする請求項１記載のディーゼ
ル機関の燃料噴射装置。2. A pressure sensor (37) in a water channel, which is provided in a water supply channel (16) from a water amount detection sensor (35) of a water tank (28) at a place where a water shortage signal is taken out to the controller.
The fuel injection device for a diesel engine according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10223492A JP3165502B2 (en) | 1992-03-27 | 1992-03-27 | Diesel engine fuel injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10223492A JP3165502B2 (en) | 1992-03-27 | 1992-03-27 | Diesel engine fuel injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05312117A true JPH05312117A (en) | 1993-11-22 |
| JP3165502B2 JP3165502B2 (en) | 2001-05-14 |
Family
ID=14321956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10223492A Expired - Lifetime JP3165502B2 (en) | 1992-03-27 | 1992-03-27 | Diesel engine fuel injection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3165502B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180274489A1 (en) * | 2015-12-07 | 2018-09-27 | Robert Bosch Gmbh | Fuel metering for the operation of an internal combustion engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3122264U (en) | 2006-03-27 | 2006-06-08 | 枝芳 羅 | Air cushion device for shoes |
-
1992
- 1992-03-27 JP JP10223492A patent/JP3165502B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180274489A1 (en) * | 2015-12-07 | 2018-09-27 | Robert Bosch Gmbh | Fuel metering for the operation of an internal combustion engine |
| US10837408B2 (en) * | 2015-12-07 | 2020-11-17 | Robert Bosch Gmbh | Fuel metering for the operation of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3165502B2 (en) | 2001-05-14 |
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