EP0972932A1 - Injection valve for internal combustion engines - Google Patents

Injection valve for internal combustion engines Download PDF

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Publication number
EP0972932A1
EP0972932A1 EP99107868A EP99107868A EP0972932A1 EP 0972932 A1 EP0972932 A1 EP 0972932A1 EP 99107868 A EP99107868 A EP 99107868A EP 99107868 A EP99107868 A EP 99107868A EP 0972932 A1 EP0972932 A1 EP 0972932A1
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EP
European Patent Office
Prior art keywords
nozzle
valve
injection
needle
nozzle bores
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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.)
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Application number
EP99107868A
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German (de)
French (fr)
Inventor
Hans-Jürgen Schacht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Motoren GmbH and Co KG
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MaK Motoren GmbH and Co KG
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Publication date
Application filed by MaK Motoren GmbH and Co KG filed Critical MaK Motoren GmbH and Co KG
Publication of EP0972932A1 publication Critical patent/EP0972932A1/en
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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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies

Definitions

  • the invention relates to an injection valve for Internal combustion engines, with adjustable variable flow, being a valve body with in two on top of each other provided levels provided nozzle holes are controllable via assigned valve needles are.
  • EP 0 546 985 A1 describes a fuel injection valve for an internal combustion engine known for an optional operation with diesel oil or with a gaseous fuel is designed.
  • the injector has an injection nozzle with one above the other Nozzle holes in the valve body and in the actual nozzle.
  • An inner valve needle is in this body and an outer valve needle is on one guided sleeve surrounding the nozzle body. Both Valve needles close the nozzle bores via a conical seat from.
  • the object of the invention is to provide an injection valve for to create an internal combustion engine that depends control of the valve needle from the operating state for opening and closing nozzle bores in the injection nozzle guaranteed for variable flow.
  • nozzle holes in a stepped Blind hole of the injector are arranged and that an inner central one in an outer valve needle Valve needle is arranged, and that in the first arranged lower region of the blind bore Nozzle holes at full load from the inner Nozzle needle to be opened and the second upper Area of the blind bore arranged further Nozzle bores for partial load operation or for the Ignition beam in dual-fuel operation from the outside Nozzle needle must be opened via the injection pressure.
  • the outer valve needle forms with a first stage the blind bore a valve seat, the inner Valve needle with the second stage of the blind bore as well forms a valve seat.
  • the valve needles are hydraulically controlled, such that during an injection process the nozzle holes of the lower level are closed stay when the part load or with a Firing beam operation occurs.
  • the upper level nozzle holes are for a partial load operation and the nozzle bores of both Layers designed for full load operation.
  • the valve's injector Controllable via the inner valve needle in such a way that at small injection quantities a small one Flow cross-section of the upper bores and at a large flow cross-section all holes can be achieved.
  • the advantage of this nozzle arrangement is that the pressure level for opening in all operating states can be kept the same. Furthermore, the flows cooling fuel through the valve needle seat of the nozzle in all load conditions, which is why an extra nozzle line may not be required. The injector can quickly and above all safe, regardless of the injection pressures of one Operating state switched to another operating state become.
  • An embodiment of the invention is in the Drawing shown schematically, with a cross section through an injection valve with injection nozzle as well inner and outer valve needle is shown.
  • An injection valve 1 for an internal combustion engine comprises a valve body 2 in which an outer valve needle 3 with pressure stage 18 and an inner valve needle 4 are arranged without pressure stage.
  • the valve needle 3 will opened by the injection pressure.
  • the closing forces the valve needle 4 are electromagnetic or generated hydraulically. In this case it is hydraulic adjustment provided.
  • the inner nozzle needle 4 is centered in the outer Nozzle needle 3 is arranged and has a valve seat 12 in the lower stage II of the blind bore 7. about this valve seat 12, the nozzle bores 10 and 11 completed or opened in the lower level X-X.
  • the outer nozzle needle 3 has a valve seat 13 in the upper stage I of the blind bore 7. about this valve seat 13, the nozzle bores 8, 9 are closed or opened again.
  • the injection valve 1 By designing the injection valve 1 with the Nozzle 6 and the inner valve needle 4 it is possible the lower nozzle bores 10, 11 by hydraulic Press down to close the valve seat the inner valve pin 4 remains closed. in the If necessary, the valve needle 4 is opened so that also an injection through the nozzle bores 10, 11 he follows.
  • the injection nozzle 6 is via the inner valve needle 4th varies and can be part of the flow area cordon off.
  • the blind bore 7 with the stages I and II provided, with the bottom of the Blind bore 7, the nozzle bores 10, 11 for one Full load operation and in the upper range Nozzle holes 8, 9 are located for partial load operation.
  • the valve needle 4 sits with its sealing cone on the Stage II of the blind bore 7 and is by a controllable force during idling or during Part load operation or micropilot operation and kept tightly closed in dual-fuel mode.
  • valve needle 3 is in a known manner Spring assemblies 13 arranged biased.
  • the inner one Valve needle 4 is also for adjustment with a Control piston 15 provided, via a control line 16 is hydraulically adjustable in a piston chamber 17.
  • the assigned valve seat thus remains fixed locked when the full load is not needed becomes.

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

Abstract

The nozzle drillings (8-11) are arranged in step shaped offset blind bore (7) of the injection nozzle (6). Also an inner central needle (4) is arranged in an outer valve needle (3), and nozzle drillings (10,11) are arranged in the first lower region (YY) of the blind bore (7). These drillings are opened by the inner nozzle needle with a full load operation. Further nozzle drillings are arranged in the second upper region (XX) of the blind bore (7). These are opened over the injection pressure, for a part load operation or for the igniter jet with a dual fuel operation, by the nozzle needle (3).

Description

Die Erfindung bezieht sich auf ein Einspritzventil für Brennkraftmaschinen, mit einstellbarem variablen Durchfluß, wobei ein Ventilkörper mit in zwei übereinander angeordneten Ebenen vorgesehene Düsenbohrungen vorgesehen sind, die über zugeordnete Ventilnadeln steuerbar sind.The invention relates to an injection valve for Internal combustion engines, with adjustable variable flow, being a valve body with in two on top of each other provided levels provided nozzle holes are controllable via assigned valve needles are.

Aus der EP 0 546 985 A1 ist ein Brennstoff-Einspritzventil für eine Brennkraftmaschine bekannt, das für einen wahlweise Betrieb mit Dieselöl oder mit einem gasförmigen Brennstoff ausgelegt ist. Das Einspritzventil weist eine Einspritzdüse mit übereinander angeordneten Düsenbohrungen im Ventilkörper und in der eigentlichen Düse auf. Eine innere Ventilnadel ist in diesem Körper und eine äußere Ventilnadel ist auf einer den Düsenkörper umhüllenden Hülse geführt. Beide Ventilnadeln schließen über einen Kegelsitz die Düsenbohrungen ab.EP 0 546 985 A1 describes a fuel injection valve for an internal combustion engine known for an optional operation with diesel oil or with a gaseous fuel is designed. The injector has an injection nozzle with one above the other Nozzle holes in the valve body and in the actual nozzle. An inner valve needle is in this body and an outer valve needle is on one guided sleeve surrounding the nozzle body. Both Valve needles close the nozzle bores via a conical seat from.

Aufgabe der Erfindung ist es, ein Einspritzventil für eine Brennkraftmaschine zu schaffen, das in Abhängigkeit vom Betriebszustand eine Steuerung der Ventilnadel zum Öffnen und Schließen von Düsenbohrungen in der Einspritzdüse zum variablen Durchfluß gewährleistet.The object of the invention is to provide an injection valve for to create an internal combustion engine that depends control of the valve needle from the operating state for opening and closing nozzle bores in the injection nozzle guaranteed for variable flow.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Düsenbohrungen in einer stufenförmig abgesetzten Sackbohrung der Einspritzdüse angeordnet sind und daß in einer äußeren Ventilnadel eine innere zentrale Ventilnadel angeordnet ist, und daß die im ersten unteren Bereich der Sackbohrung angeordneten Düsenbohrungen bei Vollastbetrieb von der inneren Düsennadel geöffnet werden und die im zweiten oberen Bereich der Sackbohrung angeordneten weiteren Düsenbohrungen für den Teillastbetrieb bzw. für den Zündstrahl bei Dual-Fuel-Betrieb von der äußeren Düsennadel über den Einspritzdruck geöffent werden.This object is achieved in that the nozzle holes in a stepped Blind hole of the injector are arranged and that an inner central one in an outer valve needle Valve needle is arranged, and that in the first arranged lower region of the blind bore Nozzle holes at full load from the inner Nozzle needle to be opened and the second upper Area of the blind bore arranged further Nozzle bores for partial load operation or for the Ignition beam in dual-fuel operation from the outside Nozzle needle must be opened via the injection pressure.

Die äußere Ventilnadel bildet mit einer ersten Stufe der Sackbohrung einen Ventilsitz, wobei die innere Ventilnadel mit der zweiten Stufe der Sackbohrung ebenfalls einen Ventilsitz bildet. Die Ventilnadeln werden hydraulisch angesteuert, derart, daß bei einem Einspritzvorgang die Düsenbohrungen der unteren Ebene verschlossen bleiben, wenn die Teillast oder mit einem Zündstrahl ein Betrieb erfolgt.The outer valve needle forms with a first stage the blind bore a valve seat, the inner Valve needle with the second stage of the blind bore as well forms a valve seat. The valve needles are hydraulically controlled, such that during an injection process the nozzle holes of the lower level are closed stay when the part load or with a Firing beam operation occurs.

Durch die in zwei Ebenen angeordneten Düsenbohrungen in der Einspritzdüse und der beiden Ventilnadeln, wird es möglich, entsprechend dem Betriebszustand, mittels der Ventilnadeln die unteren Düsenbohrungen zu öffnen oder geschlossen zu halten. Im Teillastbetrieb und bei DualFuel-Betrieb werden über die innere Ventilnadel die Düsenbohrungen der unteren Ebene fest verschlossen gehalten, so daß ein Einspritzvorgang nur über die Düsenbohrungen der Ebene als Zündstrahl erfolgen kann. Die Betätigung der inneren Ventilnadel bzw. die Schließkräfte werden elektromagnetisch bzw. hydraulisch erzeugt. Thanks to the nozzle bores in the injector and the two valve needles, it will possible, according to the operating state, by means of Valve needles to open the lower nozzle holes or keep closed. In part-load operation and in dual-fuel operation are the via the inner valve needle Nozzle holes of the lower level are firmly closed kept so that an injection process only over the Nozzle holes in the plane can be used as an ignition jet. The actuation of the inner valve needle or the Closing forces become electromagnetic or hydraulic generated.

Ansonsten sind die Düsenbohrungen der oberen Ebene für einen Teillastbetrieb und die Düsenbohrungen beider Ebenen für einen Vollastbetrieb ausgelegt. Im Bereich Leerlauf bis Vollast ist die Einspritzdüse des Ventils über die innere Ventilnadel derart ansteuerbar, daß bei kleinen Einspritzmengen ein kleiner Durchflußquerschnitt der oberen Bohrungen und bei voller Einspritzmenge ein großer Durchflußquerschnitt aller Bohrungen erzielbar ist.Otherwise, the upper level nozzle holes are for a partial load operation and the nozzle bores of both Layers designed for full load operation. In the area Idle to full load is the valve's injector Controllable via the inner valve needle in such a way that at small injection quantities a small one Flow cross-section of the upper bores and at a large flow cross-section all holes can be achieved.

Der Vorteil dieser Düsenanordnung besteht darin, daß die Druckstufe zum Öffnen in allen Betriebszuständen gleichgehalten werden kann. Desweiteren fließt der kühlende Kraftstoff über den Ventilnadelsitz der Düse und zwar bei allen Lastzuständen, weshalb eine Extradüsenleitung möglicherweise nicht erforderlich ist. Durch die Einspritzdüse kann schnell und vor allem sicher, unabhängig von den Einspritzdrücken von einem Betriebszustand in einen anderen Betriebszustand umgeschaltet werden.The advantage of this nozzle arrangement is that the pressure level for opening in all operating states can be kept the same. Furthermore, the flows cooling fuel through the valve needle seat of the nozzle in all load conditions, which is why an extra nozzle line may not be required. The injector can quickly and above all safe, regardless of the injection pressures of one Operating state switched to another operating state become.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt, wobei ein Querschnitt durch ein Einspritzventil mit Einspritzdüse sowie innerer und äußerer Ventilnadel dargestellt ist.An embodiment of the invention is in the Drawing shown schematically, with a cross section through an injection valve with injection nozzle as well inner and outer valve needle is shown.

Ein Einspritzventil 1 für eine Brennkraftmaschine umfaßt einen Ventilkörper 2, in dem eine äußere Ventilnadel 3 mit Druckstufe 18 und eine innere Ventilnadel 4 ohne Druckstufe angeordnet sind. Die Ventilnadel 3 wird durch den Einspritzdruck geöffnet. Die Schließkräfte der Ventilnadel 4 werden elektromagnetisch bzw. hydraulisch erzeugt. In diesem Fall ist eine hydraulische Einstellung vorgesehen.An injection valve 1 for an internal combustion engine comprises a valve body 2 in which an outer valve needle 3 with pressure stage 18 and an inner valve needle 4 are arranged without pressure stage. The valve needle 3 will opened by the injection pressure. The closing forces the valve needle 4 are electromagnetic or generated hydraulically. In this case it is hydraulic adjustment provided.

Die innere Düsennadel 4 ist zentrisch in der äußeren Düsennadel 3 angeordnet und weist einen Ventilsitz 12 in der unteren Stufe II der Sackbohrung 7 auf. Über diesen Ventilsitz 12 werden die Düsenbohrungen 10 und 11 in der unteren Ebene X-X abgeschlossen bzw. geöffnet. Die äußere Düsennadel 3 weist einen Ventilsitz 13 in der oberen Stufe I der Sackbohrung 7 auf. Über diesen Ventilsitz 13 werden die Düsenbohrungen 8, 9 abgeschlossen bzw. wieder geöffnet.The inner nozzle needle 4 is centered in the outer Nozzle needle 3 is arranged and has a valve seat 12 in the lower stage II of the blind bore 7. about this valve seat 12, the nozzle bores 10 and 11 completed or opened in the lower level X-X. The outer nozzle needle 3 has a valve seat 13 in the upper stage I of the blind bore 7. about this valve seat 13, the nozzle bores 8, 9 are closed or opened again.

Durch die Ausbildung des Einspritzventils 1 mit der Düse 6 und der inneren Ventilnadel 4 ist es möglich, die unteren Düsenbohrungen 10, 11 durch hydraulisches Niederpressen zu verschließen, so daß der Ventilsitz der inneren Ventilmadel 4 geschlossen bleibt. Im Bedarfsfall wird die Ventilnadel 4 geöffnet, so daß auch eine Einspritzung durch die Düsenbohrungen 10, 11 erfolgt.By designing the injection valve 1 with the Nozzle 6 and the inner valve needle 4 it is possible the lower nozzle bores 10, 11 by hydraulic Press down to close the valve seat the inner valve pin 4 remains closed. in the If necessary, the valve needle 4 is opened so that also an injection through the nozzle bores 10, 11 he follows.

Es wird hierdurch eine Einspritzdüse 6 mit variablem Durchflußquerschnitt geschaffen, die sowohl bei Dieselbetrieb im Bereich Leerlauf bis Vollast als auch bei Dual-Fluel-Betrieb zur Zuführung eines Zündstrahls arbeitet. Diese Einspritzdüse 6 kann somit bei kleineren Einspritzmengen einen kleineren Durchflußquerschnitt und bei vollen Einspritzmengen einen großen Durchflußquerschnitt aufweisen. This results in an injection nozzle 6 with a variable Flow cross-section created, both with diesel operation in the range from idle to full load as well Dual-fluel operation for supplying an ignition jet is working. This injector 6 can thus smaller injection quantities a smaller flow cross section and one with full injection quantities have a large flow cross-section.

Die Einspritzdüse 6 wird über die innere Ventilnadel 4 variiert und kann einen Teil des Durchflußquerschnitts absperren.The injection nozzle 6 is via the inner valve needle 4th varies and can be part of the flow area cordon off.

Zu diesem Zweck ist die Sackbohrung 7 mit den Stufen I und II versehen, wobei sich im unteren Bereich der Sackbohrung 7 die Düsenbohrungen 10, 11 für einen Vollastbetrieb und im oberen Bereich sich die Düsenbohrungen 8, 9 für den Teillastbetrieb befinden. Die Ventilnadel 4 sitzt mit ihrem Dichtkegel auf der Stufe II der Sackbohrung 7 auf und wird durch eine steuerbare Kraft während des Leerlaufs bzw. während des Teillastbetriebs oder des Micropilot-Betriebs betrieben und im Dual-Fuel-Betrieb fest verschlossen gehalten.For this purpose, the blind bore 7 with the stages I and II provided, with the bottom of the Blind bore 7, the nozzle bores 10, 11 for one Full load operation and in the upper range Nozzle holes 8, 9 are located for partial load operation. The valve needle 4 sits with its sealing cone on the Stage II of the blind bore 7 and is by a controllable force during idling or during Part load operation or micropilot operation and kept tightly closed in dual-fuel mode.

Die Ventilnadel 3 ist in bekannter Weise durch Federanordnungen 13 vorgespannt angeordnet. Die innere Ventilnadel 4 ist zur Einstellung zusätzlich mit einem Steuerkolben 15 versehen, der über eine Steuerleitung 16 in einen Kolbenraum 17 hydraulisch einstellbar ist. Somit bleibt der zugeordnete Ventilsitz fest verschlossen, wenn die Vollastmenge nicht gebraucht wird.The valve needle 3 is in a known manner Spring assemblies 13 arranged biased. The inner one Valve needle 4 is also for adjustment with a Control piston 15 provided, via a control line 16 is hydraulically adjustable in a piston chamber 17. The assigned valve seat thus remains fixed locked when the full load is not needed becomes.

Claims (7)

Einspritzventil für Brennkraftmaschinen, mit einstellbarem variablen Durchfluß, wobei ein Ventilkörper mit in zwei übereinander angeordneten Ebenen vorgesehene Düsenbohrungen vorgesehen sind, die über zugeordnete Ventilnadeln steuerbar sind, dadurch gekennzeichnet, daß die Düsenbohrungen (8 bis 11) in einer stufenförmig abgesetzten Sackbohrung (7) der Einspritzdüse (6) angeordnet sind und daß in einer äußeren Ventilnadel (3) eine innere zentrale Ventilnadel (4) angeordnet ist, und daß die im ersten unteren Bereich (Y-Y) der Sackbohrung (7) angeordneten Düsenbohrungen (10, 11) bei Vollastbetrieb von der inneren Düsennadel (4) geöffnet werden und die im zweiten oberen Bereich (X-X) der Sackbohrung (7) angeordneten weiteren Düsenbohrungen (8, 9) für den Teillastbetrieb bzw. für den Zündstrahl bei Dual-Fuel-Betrieb von der äußeren Düsennadel (3) über den Einspritzdruck geöffent werden.Injection valve for internal combustion engines, with adjustable variable flow, being a valve body with in two superimposed levels provided nozzle holes are provided, the are controllable via assigned valve needles, thereby characterized in that the nozzle bores (8 to 11) in a stepped blind hole (7) the injector (6) are arranged and that an inner valve needle (3) central valve needle (4) is arranged, and that those in the first lower area (Y-Y) of the blind hole (7) arranged nozzle bores (10, 11) Full load operation from the inner nozzle needle (4) be opened and that in the second upper area (X-X) of the blind bore (7) arranged further Nozzle bores (8, 9) for partial load operation or for the ignition beam in dual-fuel operation from the outer nozzle needle (3) on the injection pressure be opened. Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die äußere Ventilnadel (3) mit einer ersten Stufe (I) und die innere Ventilnadel (4) mit einer zweiten Stufe (II) der Sackbohrung (7) jeweils einen Ventilsitz (13, 12) bildet. Injection valve according to claim 1, characterized in that the outer valve needle (3) with a first stage (I) and the inner valve needle (4) with a second stage (II) of the blind bore (7) in each case forms a valve seat (13, 12). Einspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die innere Ventilnadel (4) hydraulisch bzw. elektromagnetisch ansteuerbar ist, daß beim Einspritzvorgang die Düsenbohrungen (10, 11) der unteren Ebene (Y-Y) verschließbar sind.Injection valve according to claim 1 or 2, characterized in that that the inner valve needle (4) can be controlled hydraulically or electromagnetically, that during the injection process the nozzle bores (10, 11) the lower level (Y-Y) can be closed. Einspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die innere Ventilnadel (4) derart ansteuerbar ist, daß ein Teil des Durchflußquerschnitts absperrbar ist.Injection valve according to claim 1 or 2, characterized in that that the inner valve needle (4) such is controllable that part of the flow cross section is lockable. Einspritzventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß im Bereich Leerlauf bis Vollast die Einspritzdüse (6) des Ventils (1) über die innere und äußere Ventilnadel (4, 3) derart ansteuerbar ist, daß bei kleinen Einspritzmengen ein kleiner Durchflußquerschnitt und bei vollen Einspritzmengen der volle Durchflußquerschnitt aller Düsenbohrungen (8 - 11) einstellbar ist.Injection valve according to one of claims 1 to 4, characterized in that in the idle range up to The injector (6) of the valve (1) is fully loaded the inner and outer valve needles (4, 3) can be controlled in this way is that with small injection quantities small flow cross-section and with full injection quantities the full flow cross section of all Nozzle bores (8 - 11) is adjustable. Einspritzventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Düsenbohrungen (8, 9) der oberen Ebene (X-X) für einen Teillastbetrieb und alle Düsenbohrungen (8 - 11) beider Ebenen für einen Vollastbetrieb ausgelegt sind.Injection valve according to one of claims 1 to 5, characterized in that the nozzle bores (8, 9) the upper level (X-X) for a partial load operation and all nozzle bores (8 - 11) on both levels for are designed for full load operation. Einspritzventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Düsenbohrungen (10, 11) im Teillastbetrieb und im Dual-Fluel-Betrieb über die innere Ventilnadel (4) mittels einer gesteuerten Schließkraft verschlossen sind.Injection valve according to one of claims 1 to 6, characterized in that the nozzle bores (10, 11) in part-load operation and in dual-fluel operation via the inner valve needle (4) by means of a controlled Closing force are closed.
EP99107868A 1998-07-16 1999-04-21 Injection valve for internal combustion engines Withdrawn EP0972932A1 (en)

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Application Number Priority Date Filing Date Title
DE19831837 1998-07-16
DE19831837 1998-07-16

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002042631A1 (en) * 2000-11-22 2002-05-30 Robert Bosch Gmbh Injection nozzle comprising two separately controllable nozzle needles
EP1217204A1 (en) * 2000-12-22 2002-06-26 Caterpillar Inc. Partially plastic fuel injector component and method of making the same
WO2003018991A1 (en) * 2001-08-25 2003-03-06 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
FR2853352A1 (en) * 2003-04-04 2004-10-08 Peugeot Citroen Automobiles Sa Internal combustion engine, has injector with nozzle that facilitates injection of petrol in combustion chamber based on two conical distributions with distinct conical angles and at pressure exceeding preset pressure
WO2012072864A1 (en) 2010-12-01 2012-06-07 Wärtsilä Finland Oy Control method for an internal combustion engine and internal combustion engine
WO2012072881A1 (en) 2010-12-02 2012-06-07 Wärtsilä Finland Oy A fuel injection unit, a method of operating such and an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3824467A1 (en) * 1988-07-19 1990-01-25 Man B & W Diesel Ag Injection valve
DE4115477A1 (en) * 1990-05-17 1991-11-21 Avl Verbrennungskraft Messtech Injection nozzle for IC engine - has hollow needle controlling first group of injection holes and loaded by first spring towards its closure position
EP0546985A1 (en) 1991-12-10 1993-06-16 New Sulzer Diesel Ag Fuel injection valve for a reciprocating internal combustion engine optionally operating on diesel oil or on a gaseous fuel
DE4432686A1 (en) * 1994-09-14 1996-05-23 Man B & W Diesel Ag IC engine fuel injection nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3824467A1 (en) * 1988-07-19 1990-01-25 Man B & W Diesel Ag Injection valve
DE4115477A1 (en) * 1990-05-17 1991-11-21 Avl Verbrennungskraft Messtech Injection nozzle for IC engine - has hollow needle controlling first group of injection holes and loaded by first spring towards its closure position
EP0546985A1 (en) 1991-12-10 1993-06-16 New Sulzer Diesel Ag Fuel injection valve for a reciprocating internal combustion engine optionally operating on diesel oil or on a gaseous fuel
DE4432686A1 (en) * 1994-09-14 1996-05-23 Man B & W Diesel Ag IC engine fuel injection nozzle

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002042631A1 (en) * 2000-11-22 2002-05-30 Robert Bosch Gmbh Injection nozzle comprising two separately controllable nozzle needles
DE10058153A1 (en) * 2000-11-22 2002-06-06 Bosch Gmbh Robert Injection nozzle with separately controllable nozzle needles
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CN103237972B (en) * 2010-12-01 2016-01-20 瓦锡兰芬兰有限公司 For controlling method and the explosive motor of explosive motor
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