JP4574762B2 - Fuel injection device for reciprocating piston engine - Google Patents

Fuel injection device for reciprocating piston engine Download PDF

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Publication number
JP4574762B2
JP4574762B2 JP18533599A JP18533599A JP4574762B2 JP 4574762 B2 JP4574762 B2 JP 4574762B2 JP 18533599 A JP18533599 A JP 18533599A JP 18533599 A JP18533599 A JP 18533599A JP 4574762 B2 JP4574762 B2 JP 4574762B2
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fuel
piston
fuel injection
control
injection device
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JP2000073912A (en
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ホーファー ロベルト
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Wartsila NSD Schweiz AG
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Wartsila NSD Schweiz AG
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    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、噴射される燃料の量を計測する計測ピストンを有する燃料供給機構を含み、計測ピストンを制御する制御手段と、燃料ノズルへ燃料を供給する制御部材及び噴射制御用の油圧電気装置とを具備する往復ピストンエンジンの燃料噴射装置に関し、この装置を有する往復ピストンエンジンに関するものである。
【０００２】
【従来の技術】
欧州特許出願公開第ＥＰ−Ａ０６９０２２２号に以下のような燃料噴射装置が開示されている。この装置は、２０００バールまでの高圧下において燃料ポンプにより燃料が供給される計測ピストン、及び燃料導入要素を有する制御ピストンを具備している。制御ピストンは、電気的に制御される油圧システムにより２つの端部の間を移動する。燃料は導入要素を介して燃料ポンプから計測チャンバへ、または計測チャンバから往復ピストンエンジンのシリンダの噴射ノズルへとそれぞれ供給される。導入要素は、前記２つの端部のどちら側においても燃料ポンプへの接続、及びシリンダの噴射ノズルへの接続が同時に行われないように配置されている。
【０００３】
【発明が解決しようとする課題】
本発明の目的は、噴射ノズルが励起される往復ピストンエンジンの燃料噴射装置を供給することにある。
【０００４】
【課題を解決するための手段】
上記課題を解決するための本発明の燃料噴射装置は、以下の構成を有する。
本発明の燃料噴射装置は、燃料供給機構と、噴射されるべき燃料の量を計測する計測ピストンと、前記計測ピストンを制御する制御手段と、計測ピストンの下流に設けられ、燃料噴射ノズルに燃料を供給するための制御部材と、噴射を制御する油圧電気装置とを備えている。前記計測ピストンは、燃料の圧力を噴射圧力まで上昇させるため、圧力増幅器として構成され、前記計測ピストンのチャンバへ燃料を供給する前記燃料供給機構は噴射圧よりも低圧で燃料を供給し、前記制御部材は制御バルブとして構成され、前記計測ピストンの制御手段及び燃料噴射ノズルへの燃料の量を制御する制御バルブは噴射プロセスを制御するために油圧電気装置に連通した状態に維持される。燃料噴射装置は、燃料の噴射量の決定のために、圧力増幅器のピストンの実際位置を監視するとともに圧力増幅器のピストンの実際位置を所望位置と比較し、前記燃料噴射ノズルの故障を判定するために、圧力増幅器のピストンの実際速度を監視するとともに圧力増幅器のピストンの実際速度を所望速度と比較する試料採取器を備えたことを特徴とする。
【０００５】
前記燃料噴射装置は、前記圧力増幅器がガイドピストンとして形成され、前記燃料供給機構は小ピストンのチャンバに放出する。
前記燃料噴射装置は、前記制御手段が大ピストンのチャンバと接続する制御スライダとして形成されている。
【０００６】
前記燃料噴射装置は、圧力増幅器の現在位置を監視すると共に、圧力増幅器の実際位置を所望位置と比較するための試料採取器が具備されている。
前記燃料噴射装置は、圧力増幅器の実際速度を監視すると共に、圧力増幅器の実際速度を所望速度と比較するための試料採取器が具備されている。
【０００７】
前記燃料噴射装置は、作動オイルの供給用に１個以上のアキュムレータを有する機構と、各制御スライダ及び各制御バルブ用の予備制御バルブとが具備されている。
【０００８】
前記燃料噴射装置は、実際値と所望値との比較により、噴射の開始及び／または噴射量を制御するために適合制御装置が具備されている。
前記燃料噴射装置は、内部エンジンの複数のシリンダ、またはシリンダの複数の噴射ノズルに燃料を供給するために、複数の制御バルブが圧力増幅器に結合されている。
【０００９】
また、前記の燃料噴射装置は、往復ピストンエンジンのシリンダにディーゼルオイル及び重油の噴射を行うための燃料噴射装置である。
前記の燃料噴射装置を含む往復ピストンエンジンは、２行程または４行程の内部エンジンである。
【００１０】
圧力増幅器の使用により燃料供給が簡素化され、この結果、燃料のアキュムレータは２０００バールまでの高圧下にあり、高圧ポンプが省略される。これにより、漏洩の危険がほぼ取り除かれ、運転上の安全性が向上する。制御バルブを具備することにより、レジスタにおける噴射ノズルの励起、スタッタ噴射、及び／または１つ以上のシリンダの噴射バルブのスイッチを切ることが可能となる。１つのシリンダの全ての噴射ノズルが故障したとき、この装置では部分負荷で残るシリンダにより運転可能である。
【００１１】
部分的に充満された、または排出された噴射ノズルにおいて、噴射体積は一定値に保持される。行程測定値が低下したときにも、噴射が制御された時間に始まる。点火圧力測定装置が使用される場合は、点火圧力が噴射装置により許容値に制御され、最も好ましい燃料消費が常に達成できる。
【００１２】
【発明の実施の形態】
以下、本発明について一実施例を図面に従って詳述するが、図面は本発明の装置及び噴射ノズルを示す。
【００１３】
噴射装置は、２つの端部間において移動可能な圧力増幅器１及び制御スライダ２、制御バルブ３、油圧電気装置４を含む。圧力増幅器１は直径が異なる２つのピストン７，８を有するガイドピストンとして形成される。ピストン７，８は、チャンバ９，１０内において移動可能に配置されている。大ピストン７のチャンバ９は通路１１を介して制御スライダ２と接続し、小ピストン８のチャンバ１０は通路１２を介して制御バルブ３と、通路１３を介して燃料（例えばディーゼル燃料または重油）供給機構１４と接続している。チャンバ９において、端部で圧力増幅器１を保持する弾性手段１５が配置されている。前記端部において、制御スライダ２への接続通路１１は閉鎖され、制御バルブ３及び燃料供給機構１４への各接続通路１２，１３は開放されている。制御スライダ２は円筒状のチャンバ２１に配置され、チャンバ２１は供給通路２２、圧力増幅器１に連結する消費通路１１、放出通路２４、圧力手段に対して反対側位置にある通路２５、漏れ通路２６を有する。チャンバ内に配置されたばね２７が端部において制御スライダ２を保持し、通路２５が閉鎖されている。制御スライダ２は円筒状であり、媒体の通過を制御するために２つの制御縁部３２，３２を有する。制御バルブ３は開閉機能を備え、弁座を有するバルブ本体４１、燃料供給通路４２、折返し通路４３、消費通路４４、バルブ円錐４６を有するバルブスライダ４５、及び公知のバルブスライダ駆動部４７を有する。油圧電気装置４は複数の油圧ポンプ５１（１個のみ図示されている）、アキュムレータ５２、制御スライダ２及び制御バルブ３の予備制御バルブ５３，５４、回転角度及びクランクシャフト位置を示す角度センサー５５、圧力増幅器の位置を試料採取する試料採取器５６、及び電子制御５７から構成され、電子制御５７は予備制御バルブ５３，５４、角度センサー５５及び試料採取器５６に対して信号伝達系により接続されている。試料採取器５６は誘導測定システムとして形成されている。他の測定システム、例えば容量的、光学的、磁気的等の測定システムを使用することもできる。むだ時間（不感時間）を補償するために、適合要素を有する噴射体積制御が備えられている。さらに、回転速度に左右される適合噴射開始制御が備えられている。位置及び速度の実測値の監視及び制御は、計測ピストンの位置及び速度の所望値との比較により行われる。
【００１４】
図示するように、アキュムレータ５２から分枝する複数のライン６１が往復ピストンエンジンの各シリンダに取り付けられ、シリンダは１個以上のノズルを有する。ライン６１は制御スライダ２の供給通路２２、及び予備制御バルブ５３，５４に接続される。ライン６２は各排出弁（図示せず）に接続される。前述したように、圧力増幅器１は制御バルブ３と接続している。
【００１５】
図示するように、複数の制御バルブ３が圧力増幅器１に接続される。圧力増幅器は２つの仕事、即ち各噴射プロセスにおける燃料圧力を計測し、かつこれを増加させる。燃料計測は試料採取器５６により行われ、試料採取器５６は継続的に変位距離を測定し、その測定値を電子制御５７へ信号として送る。変化した体積は、圧力増幅器１の小ピストン８の断面積及び移動行程から決定され、噴射容積がわかる。さらに、例えば破損した噴射ノズルも、ピストンフィーラを計測することにより間接的に測定される。そのような場合は、計測ピストン速度が通常の噴射プロセスよりも大きくなるからである。この信号により電子制御が行われ、破損した噴射ノズルでシリンダ内への燃料噴射が抑圧され、適切な箇所で全モータ負荷が低減され、及び／または警報装置により故障を報知する。油圧ポンプは約１００〜３００バールの圧力でアキュムレータ５２に制御オイルを運搬する。このオイルに含まれるエネルギーは前記の状態において装置の作動に使われる。
【００１６】
図は装置が噴射前の状態にあることを示し、燃料供給機構１４が圧力増幅器１に約１０バールの圧力で燃料を供給し、噴射が始まり、以下のように進行する。噴射が始まる直前に、制御スライダ２の予備制御バルブ５３は電子制御５７から励起され、制御スライダ２は駆動位置へと比較的緩慢に変位される。制御オイルは圧力増幅器１の大チャンバ９内に流入し、ガイドピストンを移動させて小チャンバ１０内の燃料が移動される。小チャンバ１０は一方では燃料供給機構１４の復帰しないバルブにより閉鎖され、他方では閉じた制御バルブ３により閉鎖され、ガイドピストンの面積比に対応した圧力が蓄積される。この圧力が蓄積されている間において、または後にバルブスライダ４５が作動されて制御バルブ３が開き、燃料が噴射ノズル内に流入する。低圧力における噴射を防止するため、噴射プロセスはすぐに終了する。
【００１７】
噴射プロセスの終了後、制御スライダ２が静止位置に回復され、制御オイルが圧力増幅器１の大チャンバ９から通路１１及び通路２４を介して流出する。このように、前記回復は弾性手段１５により支えられ、圧力増幅器１の小チャンバ１０内に燃料が新たに流入する。
【００１８】
燃料の量を決めて噴射圧力にまで高めるために、この装置はガイドピストンを有する圧力増幅器１として形成された計測ピストン、及び１つ以上の燃料噴射ノズル５を供給するために少なくとも１つの制御バルブ３を含む。圧力増幅器１及び制御バルブは電気的に制御された油圧システムにより作動され、この油圧システムは噴射圧力よりもほぼ低い圧力下で作動オイルがポンプにより供給される。
各噴射は制御バルブ３により行われる。
【００１９】
【発明の効果】
以上詳述したように、本発明の燃料噴射装置は、燃料噴射が容易に、かつ正確に行われるという効果がある。
【図面の簡単な説明】
【図１】本発明の燃料噴射装置及び噴射ノズルを示す概略図。
【符号の説明】
１…圧力増幅器、 ２…制御スライダ、 ３…制御バルブ、
４…油圧電気装置、 ５…燃料噴射ノズル、 １４…燃料供給機構[0001]
BACKGROUND OF THE INVENTION
The present invention includes a fuel supply mechanism having a measurement piston for measuring the amount of fuel to be injected, a control means for controlling the measurement piston, a control member for supplying fuel to a fuel nozzle, and a hydraulic electric device for injection control And a reciprocating piston engine having this device.
[0002]
[Prior art]
European Patent Application Publication No. EP-A0690222 discloses the following fuel injection device. This device comprises a measuring piston which is supplied with fuel by a fuel pump under high pressure up to 2000 bar, and a control piston with a fuel introduction element. The control piston is moved between the two ends by an electrically controlled hydraulic system. Fuel is supplied from the fuel pump to the measuring chamber via the introduction element, or from the measuring chamber to the injection nozzle of the cylinder of the reciprocating piston engine. The introduction element is arranged so that on either side of the two ends the connection to the fuel pump and the connection to the injection nozzle of the cylinder are not made simultaneously.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a fuel injection device for a reciprocating piston engine in which an injection nozzle is excited.
[0004]
[Means for Solving the Problems]
The fuel injection device of the present invention for solving the above problems has the following configuration.
The fuel injection device of the present invention is provided downstream of the fuel supply mechanism, the measurement piston for measuring the amount of fuel to be injected, the control means for controlling the measurement piston, and the fuel injection nozzle. And a hydraulic electric device for controlling the injection. The measurement piston is configured as a pressure amplifier to raise the fuel pressure to the injection pressure, and the fuel supply mechanism that supplies fuel to the measurement piston chamber supplies fuel at a pressure lower than the injection pressure, and the control The member is configured as a control valve, and the control means of the measuring piston and the control valve for controlling the amount of fuel to the fuel injection nozzle are maintained in communication with the hydraulic electrical device to control the injection process. In order to determine the fuel injection amount, the fuel injection device monitors the actual position of the piston of the pressure amplifier and compares the actual position of the pressure amplifier piston with a desired position to determine a failure of the fuel injection nozzle. And a sampler for monitoring the actual speed of the pressure amplifier piston and comparing the actual speed of the pressure amplifier piston with a desired speed.
[0005]
In the fuel injection device, the pressure amplifier is formed as a guide piston, and the fuel supply mechanism discharges into a chamber of a small piston.
The fuel injection device is formed as a control slider in which the control means is connected to a chamber of a large piston.
[0006]
The fuel injector is equipped with a sampler for monitoring the current position of the pressure amplifier and comparing the actual position of the pressure amplifier with a desired position.
The fuel injector is equipped with a sampler for monitoring the actual speed of the pressure amplifier and comparing the actual speed of the pressure amplifier with a desired speed.
[0007]
The fuel injection device includes a mechanism having one or more accumulators for supplying hydraulic oil, and a preliminary control valve for each control slider and each control valve.
[0008]
The fuel injection device is provided with an adaptive control device for controlling the start of injection and / or the injection amount by comparing the actual value with the desired value.
In the fuel injection device, a plurality of control valves are coupled to a pressure amplifier for supplying fuel to a plurality of cylinders of the internal engine or a plurality of injection nozzles of the cylinders.
[0009]
The fuel injection device is a fuel injection device for injecting diesel oil and heavy oil into a cylinder of a reciprocating piston engine.
The reciprocating piston engine including the fuel injection device is a two-stroke or four-stroke internal engine.
[0010]
The use of a pressure amplifier simplifies the fuel supply, so that the fuel accumulator is under high pressure up to 2000 bar and the high-pressure pump is omitted. This substantially eliminates the risk of leakage and improves operational safety. By providing a control valve, it is possible to excite the injection nozzles in the register, stutter injection, and / or to switch off one or more cylinder injection valves. When all the injection nozzles of one cylinder have failed, the device can be operated with the cylinder remaining at partial load.
[0011]
In a partially filled or discharged spray nozzle, the spray volume is kept constant. The injection also begins at a controlled time when the stroke measurement drops. If an ignition pressure measuring device is used, the ignition pressure is controlled to an acceptable value by the injector and the most favorable fuel consumption can always be achieved.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. The drawings show an apparatus and an injection nozzle according to the present invention.
[0013]
The injection device includes a pressure amplifier 1, a control slider 2, a control valve 3, and a hydraulic electric device 4 that are movable between two ends. The pressure amplifier 1 is formed as a guide piston having two pistons 7, 8 having different diameters. The pistons 7 and 8 are movably disposed in the chambers 9 and 10. The chamber 9 of the large piston 7 is connected to the control slider 2 via a passage 11, and the chamber 10 of the small piston 8 is supplied with fuel (for example, diesel fuel or heavy oil) via the passage 12 and the control valve 3 and passage 13. It is connected to the mechanism 14. In the chamber 9, elastic means 15 for holding the pressure amplifier 1 at the end is arranged. At the end, the connection passage 11 to the control slider 2 is closed, and the connection passages 12 and 13 to the control valve 3 and the fuel supply mechanism 14 are opened. The control slider 2 is disposed in a cylindrical chamber 21, which is a supply passage 22, a consumption passage 11 connected to the pressure amplifier 1, a discharge passage 24, a passage 25 opposite to the pressure means, and a leakage passage 26. Have A spring 27 arranged in the chamber holds the control slider 2 at the end and the passage 25 is closed. The control slider 2 is cylindrical and has two control edges 32, 32 for controlling the passage of the medium. The control valve 3 has an opening / closing function, and includes a valve body 41 having a valve seat, a fuel supply passage 42, a return passage 43, a consumption passage 44, a valve slider 45 having a valve cone 46, and a known valve slider drive unit 47. The hydraulic electric device 4 includes a plurality of hydraulic pumps 51 (only one is shown), an accumulator 52, preliminary control valves 53 and 54 for the control slider 2 and the control valve 3, an angle sensor 55 for indicating a rotation angle and a crankshaft position, It comprises a sampler 56 for sampling the position of the pressure amplifier and an electronic control 57. The electronic control 57 is connected to the preliminary control valves 53 and 54, the angle sensor 55 and the sampler 56 by a signal transmission system. Yes. The sampler 56 is configured as an inductive measurement system. Other measurement systems such as capacitive, optical, magnetic, etc. measurement systems can also be used. In order to compensate for dead time (dead time), a jet volume control with a matching element is provided. Furthermore, adaptive injection start control that depends on the rotational speed is provided. Monitoring and control of the actual values of position and speed are performed by comparison with desired values of the position and speed of the measuring piston.
[0014]
As shown, a plurality of lines 61 branching from the accumulator 52 are attached to each cylinder of the reciprocating piston engine, and the cylinder has one or more nozzles. The line 61 is connected to the supply passage 22 of the control slider 2 and the preliminary control valves 53 and 54. Line 62 is connected to each drain valve (not shown). As described above, the pressure amplifier 1 is connected to the control valve 3.
[0015]
As shown, a plurality of control valves 3 are connected to the pressure amplifier 1. The pressure amplifier measures and increases the fuel pressure in two tasks, each injection process. The fuel measurement is performed by the sampler 56. The sampler 56 continuously measures the displacement distance and sends the measured value to the electronic control 57 as a signal. The changed volume is determined from the cross-sectional area of the small piston 8 of the pressure amplifier 1 and the travel stroke, and the injection volume is known. Furthermore, for example, a broken injection nozzle is also indirectly measured by measuring the piston feeler. This is because in such a case, the measured piston speed is larger than that in the normal injection process. Electronic control is performed by this signal, fuel injection into the cylinder is suppressed by the damaged injection nozzle, the total motor load is reduced at an appropriate location, and / or a failure is notified by an alarm device. The hydraulic pump carries the control oil to the accumulator 52 at a pressure of about 100-300 bar. The energy contained in this oil is used to operate the device in the above state.
[0016]
The figure shows that the device is in a pre-injection state, the fuel supply mechanism 14 supplies fuel to the pressure amplifier 1 at a pressure of about 10 bar, the injection begins and proceeds as follows. Immediately before the injection starts, the preliminary control valve 53 of the control slider 2 is excited by the electronic control 57, and the control slider 2 is displaced relatively slowly to the drive position. The control oil flows into the large chamber 9 of the pressure amplifier 1 and moves the guide piston to move the fuel in the small chamber 10. The small chamber 10 is closed on the one hand by a non-returning valve of the fuel supply mechanism 14 and on the other hand by a closed control valve 3, and a pressure corresponding to the area ratio of the guide piston is accumulated. While this pressure is accumulated, or later, the valve slider 45 is actuated to open the control valve 3, and fuel flows into the injection nozzle. In order to prevent injection at low pressure, the injection process is terminated immediately.
[0017]
After the injection process is finished, the control slider 2 is restored to the rest position, and the control oil flows out from the large chamber 9 of the pressure amplifier 1 through the passage 11 and the passage 24. In this way, the recovery is supported by the elastic means 15, and fuel newly flows into the small chamber 10 of the pressure amplifier 1.
[0018]
In order to determine the amount of fuel and increase it to the injection pressure, the device comprises a measuring piston formed as a pressure amplifier 1 with a guide piston and at least one control valve for supplying one or more fuel injection nozzles 5. 3 is included. The pressure amplifier 1 and the control valve are operated by an electrically controlled hydraulic system, which is supplied with hydraulic oil under a pressure that is substantially lower than the injection pressure.
Each injection is performed by the control valve 3.
[0019]
【The invention's effect】
As described above in detail, the fuel injection device of the present invention has an effect that fuel injection is performed easily and accurately.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a fuel injection device and an injection nozzle of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pressure amplifier, 2 ... Control slider, 3 ... Control valve,
4 ... hydraulic electric device, 5 ... fuel injection nozzle, 14 ... fuel supply mechanism

Claims (8)

燃料供給機構（１４）と、噴射されるべき燃料の量を計測する計測ピストン（１）と、前記計測ピストンを制御する制御手段（２）と、計測ピストンの下流に設けられ、燃料噴射ノズル（５）に燃料を供給するための制御部材（３）と、噴射を制御する油圧電気装置（４）とを備え、
前記計測ピストンは、燃料の圧力を噴射圧力まで上昇させるため、圧力増幅器（１）として構成され、
前記計測ピストンのチャンバ（１０）へ燃料を供給する前記燃料供給機構（１４）は噴射圧よりも低圧で燃料を供給し、前記制御部材（３）は制御バルブ（３）として構成され、
前記計測ピストン（１）の制御手段（２）及び燃料噴射ノズル（５）への燃料の量を制御する制御バルブ（３）は噴射プロセスを制御するために油圧電気装置（４）に連通した状態に維持された燃料噴射装置において、
燃料の噴射量の決定のために、圧力増幅器（１）のピストン（７，８）の実際位置を監視するとともに圧力増幅器のピストン（７，８）の実際位置を所望位置と比較し、前記燃料噴射ノズル（５）の故障を判定するために、圧力増幅器のピストン（７，８）の実際速度を監視するとともに圧力増幅器（１）のピストン（７，８）の実際速度を所望速度と比較する試料採取器（５６）を備えたことを特徴とする燃料噴射装置。A fuel supply mechanism (14), a measurement piston (1) for measuring the amount of fuel to be injected, a control means (2) for controlling the measurement piston, and a fuel injection nozzle ( A control member (3) for supplying fuel to 5) and a hydraulic electric device (4) for controlling injection;
The measuring piston is configured as a pressure amplifier (1) to raise the fuel pressure to the injection pressure,
The fuel supply mechanism (14) for supplying fuel to the chamber (10) of the measurement piston supplies fuel at a pressure lower than the injection pressure, and the control member (3) is configured as a control valve (3),
The control means (2) of the measuring piston (1) and the control valve (3) for controlling the amount of fuel to the fuel injection nozzle (5) are in communication with the hydraulic electric device (4) to control the injection process In a fuel injection device maintained at
In order to determine the fuel injection amount, the actual position of the piston (7, 8) of the pressure amplifier (1) is monitored, and the actual position of the piston (7, 8) of the pressure amplifier is compared with a desired position, so that the fuel In order to determine the failure of the injection nozzle (5), the actual speed of the piston (7, 8) of the pressure amplifier is monitored and the actual speed of the piston (7, 8) of the pressure amplifier (1) is compared with the desired speed. A fuel injection device comprising a sampler (56). 前記圧力増幅器は外径の異なる２つのピストン（７，８）を有するガイドピストン（１）として形成され、燃料供給機構（１４）は小ピストン（８）のチャンバ（１０）に対して開口している請求項１に記載の燃料噴射装置。  The pressure amplifier is formed as a guide piston (1) having two pistons (7, 8) with different outer diameters, and the fuel supply mechanism (14) opens to the chamber (10) of the small piston (8). The fuel injection device according to claim 1. 前記制御手段が大ピストン（７）のチャンバ（９）と接続する制御スライダ（２）として形成されていることを特徴とする請求項２に記載の燃料噴射装置。  3. The fuel injection device according to claim 2, wherein the control means is formed as a control slider (2) connected to the chamber (9) of the large piston (7). 作動オイルの供給用に１個以上のアキュムレータ（５２）を有する機構と、各制御スライダ（２）及び各制御バルブ（３）用の予備制御バルブ（５３，５４）とが具備されていることを特徴とする請求項３に記載の燃料噴射装置。  A mechanism having one or more accumulators (52) for supplying hydraulic oil and a preliminary control valve (53, 54) for each control slider (2) and each control valve (3) are provided. The fuel injection device according to claim 3, wherein 実際値と所望値との比較により、噴射の量を制御するため、前記試料採取器（５６）に対する信号伝達のためにその試料採取装置（５６）に接続された適合制御装置（５７）が具備されていることを特徴とする請求項１乃至４のいずれか１項に記載の燃料噴射装置。The actual value and compared with the desired value, for controlling the amount of elevation injection, connected adaptive control device for the sampling device (56) for signal transfer to the sampler (56) (57) The fuel injection device according to any one of claims 1 to 4, wherein the fuel injection device is provided. 内燃エンジンの複数のシリンダ、またはシリンダの複数の噴射ノズル（５）に燃料を供給するために、複数の制御バルブ（３）が圧力増幅器（１）に接続されていることを特徴とする請求項１乃至５のいずれか１項に記載の燃料噴射装置。  A plurality of control valves (3) are connected to the pressure amplifier (1) for supplying fuel to the cylinders of the internal combustion engine or to the injection nozzles (5) of the cylinders. The fuel injection device according to any one of 1 to 5. 請求項１乃至６のいずれか１項の燃料噴射装置は、往復ピストンエンジンのシリンダにディーゼルオイル及び重油の噴射を行うための燃料噴射装置であることを特徴とする燃料噴射装置。  The fuel injection device according to any one of claims 1 to 6, wherein the fuel injection device is a fuel injection device for injecting diesel oil and heavy oil into a cylinder of a reciprocating piston engine. 請求項１乃至７のいずれか１項の燃料噴射装置を含む往復ピストンエンジンは、２行程または４行程の内燃エンジンであることを特徴とする往復ピストンエンジン。  A reciprocating piston engine comprising the fuel injection device according to any one of claims 1 to 7, wherein the reciprocating piston engine is a two-stroke or four-stroke internal combustion engine.
JP18533599A 1998-08-28 1999-06-30 Fuel injection device for reciprocating piston engine Expired - Fee Related JP4574762B2 (en)

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DE59914703D1 (en) 2008-05-08
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CN1246581A (en) 2000-03-08
EP0982492B1 (en) 2008-03-26
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