EP1125052A1 - Fuel injection valve - Google Patents

Fuel injection valve

Info

Publication number
EP1125052A1
EP1125052A1 EP00967524A EP00967524A EP1125052A1 EP 1125052 A1 EP1125052 A1 EP 1125052A1 EP 00967524 A EP00967524 A EP 00967524A EP 00967524 A EP00967524 A EP 00967524A EP 1125052 A1 EP1125052 A1 EP 1125052A1
Authority
EP
European Patent Office
Prior art keywords
pressure chamber
control pressure
actuating part
fuel injection
nozzle needle
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.)
Withdrawn
Application number
EP00967524A
Other languages
German (de)
French (fr)
Inventor
Rainer Buck
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1125052A1 publication Critical patent/EP1125052A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure

Definitions

  • the invention relates to a fuel injection valve with a valve body, a control pressure chamber formed therein, which is closed on one side by an actuating part for a nozzle needle, which can be displaced in the control pressure chamber between a closed position and an open position, an inlet to the control pressure chamber and with an outlet from the control pressure chamber, which is controlled by a control valve.
  • Such a control valve is known for example from DE 197 27 896 AI and serves to cause the opening of a nozzle needle of the injection valve in order to inject fuel into a cylinder of an internal combustion engine.
  • An opening pressure is constantly applied to the nozzle needle, which attempts to lift the nozzle needle off the assigned valve seat.
  • This opening force is counteracted by a closing force which is exerted on the actuating part in the control pressure chamber.
  • the closing force generated there is higher than the opening force acting on the nozzle needle, so that the actuating part m in the closed position and consequently the nozzle needle remains closed. If, on the other hand, the pressure in the control pressure chamber and consequently also the closing force generated there decrease, the opening force succeeds in moving the actuating part into the opening position, as a result of which the nozzle needle can lift off the valve seat. Fuel can now be injected.
  • the pressure in the control pressure chamber is controlled by the control valve by closing or opening the drain. If the medium supplied to the control pressure chamber, usually fuel, is dammed up by closing the outlet, a high pressure is generated in the control pressure chamber, which holds the nozzle needle in a closed state. If, on the other hand, the control valve opens the drain, the pressure in the control pressure chamber drops so that the nozzle needle can open.
  • control valve according to the invention with the features of the characterizing part of claim 1 has the advantage that an increased speed of the nozzle needle is obtained when it is opened. This is due to the fact that the cross section of the inlet of the actuating part is reduced when it moves from its closed position in the direction of the open position. A variable throttling of the inlet is thus achieved, which supports the pressure drop in the control pressure chamber when the control valve is opened in that less fuel can flow into the control pressure chamber.
  • the mouth opening has a slit-shaped cross section.
  • FIG. 1 is a schematic view of a fuel injection valve
  • FIG. 2 shows an enlarged view of part of the fuel injection valve from FIG. 1;
  • FIG. 4 is a section along the plane IV-IV of Figure 3.
  • FIG. 5 is a diagram of the opening stroke of the nozzle needle of a conventional and an inventive fuel injection valve.
  • FIG. 1 shows a conventional fuel injection valve with a control valve (see FIG. 2).
  • the fuel injection valve has a valve body 10, to which a nozzle needle 12 is slidably attached.
  • the nozzle needle 12 controls the injection of the fuel into a cylinder of an internal combustion engine (not shown).
  • the supplied fuel exerts an opening force on the nozzle needle 12, which tries to adjust the nozzle needle and an actuating part 14, on which the nozzle needle 12 is supported, to a control pressure chamber 16.
  • the control pressure chamber 16 is also supplied with fuel, which exerts a closing force on the actuating part 14 due to the pressure prevailing in the control pressure chamber 16.
  • the fuel is provided via an inlet 18, and an outlet 20 leads from the control pressure chamber 16 and leads to a control chamber 22 of a control valve 24.
  • the outlet 20 in turn represents the inlet, and an outlet 26 is provided through which the fuel can flow out of the control pressure chamber 16 and the control chamber 22.
  • the control valve 24 has in the control chamber 22 a valve needle 28 which interacts with a valve seat 30.
  • the control valve 24 is closed, so that the fuel supplied via the inlet 18 to the control pressure chamber 16 is accumulated in the latter.
  • the high pressure generated in this way exerts a closing force on the actuating part 14 which is greater than the opening force acting on the nozzle needle 12.
  • the actuating part 14 is thus in the closed position and the fuel injection valve is closed. If, on the other hand, the valve needle 28 is lifted off the valve seat 30, the fuel can flow out of the control pressure chamber 16 via the control chamber 22 and the outlet 26, so that the pressure in the control pressure chamber drops.
  • the then reduced closing force enables the actuating part to adjust the open position from the closed position m, so that the nozzle needle opens. Fuel is now injected.
  • a fuel injection valve according to the invention is described below with reference to FIGS. 3 and 4.
  • the inlet 18 to the control pressure chamber 16 has a slit-shaped mouth opening 40 provided. This is arranged in such a way that the upper end of the actuating part 14 in relation to FIG. 3, when it adjusts itself from the closed position to the open position, gradually covers the mouth opening 40.
  • Figure 3 is an intermediate state of the actuating part 14 between the

Landscapes

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

Abstract

The invention relates to a fuel injection valve comprised of a valve body (10) and of a control pressure chamber (16) which is configured therein and which is occluded on one side by an actuating part (14) for a nozzle needle. Said actuating part can be displaced inside the control pressure chamber (16) between a closed position and an opened position. The inventive fuel injection valve is also comprised of an inlet (18) leading into the control pressure chamber and of an outlet (20) which leads out of the control pressure chamber and which is controlled by a control valve (24). The aim of the invention is to increase the opening speed of the nozzle needle. To this end, the opening (40) of the inlet (18) leading into the control pressure chamber is arranged in such a way that it is at least partially occluded by the actuating part (14) when the actuating part (14) moves out of the closed position and into the opened position.

Description

Kraftstoffexnspritzvent lFuel injector l
Stand der TechnikState of the art
Die Erfindung betrifft ein Kraftstoffeinspritzventil mit ei- nem Ventilkorper, einem darin ausgebildeten Steuerdruckraum, der an einer Seite von einem Betatigungsteil für eine Dusen- nadel verschlossen ist, das m dem Steuerdruckraum zwischen einer Schließstellung und einer Offnungsstellung verschiebbar ist, einem Zulauf zum Steuerdruckraum und mit einem Ablauf aus dem Steuerdruckraum, der von einem Steuerventil gesteuert wird.The invention relates to a fuel injection valve with a valve body, a control pressure chamber formed therein, which is closed on one side by an actuating part for a nozzle needle, which can be displaced in the control pressure chamber between a closed position and an open position, an inlet to the control pressure chamber and with an outlet from the control pressure chamber, which is controlled by a control valve.
Ein solches Steuerventil ist beispielsweise aus der DE 197 27 896 AI bekannt und dient dazu, das Offnen einer Dusennadel des Einspritzventils hervorzurufen, um Kraftstoff m einen Zylinder einer Verbrennungskraftmaschine einzuspritzen.Such a control valve is known for example from DE 197 27 896 AI and serves to cause the opening of a nozzle needle of the injection valve in order to inject fuel into a cylinder of an internal combustion engine.
Die Dusennadel wird permanent mit einem Offnungsdruck beaufschlagt, der die Dusennadel vom zugeordneten Ventilsitz abzu- heben sucht. Dieser Offnungskraft wirkt eine Schließkraft entgegen, die m dem Steuerdruckraum auf das Betatigungsteil ausgeübt wird. Solange der Druck im Steuerdruckraum auf einem hohen Niveau gehalten wird, ist die dort erzeugte Schließkraft hoher als die auf die Dusennadel einwirkende Offnungs- kraft, so daß das Betatigungsteil m der Schließstellung und folglich die Dusennadel geschlossen bleibt. Wenn dagegen der Druck im Steuerdruckraum und folglich auch die dort erzeugte Schließkraft absinkt, gelingt es der Offnungskraft, das Betatigungsteil in die Offnungsstellung zu verschieben, wodurch die Dusennadel vom Ventilsitz abheben kann. Es kann nun Kraftstoff eingespritzt werden.An opening pressure is constantly applied to the nozzle needle, which attempts to lift the nozzle needle off the assigned valve seat. This opening force is counteracted by a closing force which is exerted on the actuating part in the control pressure chamber. As long as the pressure in the control pressure chamber is kept at a high level, the closing force generated there is higher than the opening force acting on the nozzle needle, so that the actuating part m in the closed position and consequently the nozzle needle remains closed. If, on the other hand, the pressure in the control pressure chamber and consequently also the closing force generated there decrease, the opening force succeeds in moving the actuating part into the opening position, as a result of which the nozzle needle can lift off the valve seat. Fuel can now be injected.
Der Druck im Steuerdruckraum wird von dem Steuerventil gesteuert, indem der Ablauf geschlossen oder geöffnet wird. Wenn durch Schließen des Ablaufs das dem Steuerdruckraum zu- gefuhrte Medium, üblicherweise Kraftstoff, aufgestaut wird, wird im Steuerdruckraum ein hoher Druck erzeugt, der die Dusennadel in einem geschlossenen Zustand halt. Wenn dagegen das Steuerventil den Ablauf öffnet, sinkt der Druck im Steu- erdruckraum ab, so daß die Dusennadel offnen kann.The pressure in the control pressure chamber is controlled by the control valve by closing or opening the drain. If the medium supplied to the control pressure chamber, usually fuel, is dammed up by closing the outlet, a high pressure is generated in the control pressure chamber, which holds the nozzle needle in a closed state. If, on the other hand, the control valve opens the drain, the pressure in the control pressure chamber drops so that the nozzle needle can open.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemaße Steuerventil mit den Merkmalen des kenn- zeichnenden Teils des Patentanspruchs 1 hat den Vorteil, daß eine erhöhte Geschwindigkeit der Dusennadel beim Offnen erhalten wird. Dies ist darauf zur ckzuführen, daß der Querschnitt des Zulaufs von dem Betatigungsteil verringert wird, wenn sich dieses aus seiner Schließstellung m Richtung der Offnungsstellung bewegt. Es ist somit eine variable Drosselung des Zulaufs erzielt, die den Druckabfall im Steuerdruckraum beim Offnen des Steuerventils dadurch unterstutzt, daß weniger Kraftstoff in den Steuerdruckraum nachfließen kann.The control valve according to the invention with the features of the characterizing part of claim 1 has the advantage that an increased speed of the nozzle needle is obtained when it is opened. This is due to the fact that the cross section of the inlet of the actuating part is reduced when it moves from its closed position in the direction of the open position. A variable throttling of the inlet is thus achieved, which supports the pressure drop in the control pressure chamber when the control valve is opened in that less fuel can flow into the control pressure chamber.
Gemäß einer bevorzugten Ausfuhrungsform der Erfindung ist vorgesehen, daß die Mundungsoffnung einen schlitzförmigen Querschnitt aufweist. Diese Gestaltung hat den Vorteil, daß die Verringerung des Zulaufs proportional mit der Verstellung des Betatigungsteils im Steuerdruckraum erfolgt. ZeichnungenAccording to a preferred embodiment of the invention it is provided that the mouth opening has a slit-shaped cross section. This design has the advantage that the reduction in the inflow is proportional to the adjustment of the actuating part in the control pressure chamber. drawings
Die Erfindung wird nachfolgend anhand eines Ausfuhrungsbei- spiels beschrieben, das m den beigefugten Zeichnungen darge- stellt ist. In diesen zeigen:The invention is described below with reference to an exemplary embodiment, which is shown in the accompanying drawings. In these show:
- Figur 1 eine schematische Ansicht eines Kraftstoffein- spritzventils ;- Figure 1 is a schematic view of a fuel injection valve;
- Figur 2 m einer vergrößerten Ansicht einen Teil des Kraftstoffeinspritzventils von Figur 1 ;FIG. 2 shows an enlarged view of part of the fuel injection valve from FIG. 1;
- Figur 3 m einer abgebrochenen Querschnittsansicht einen Ausschnitt eines erfmdungsgemäßen Kraftstoffemspritzven- tils;- Figure 3 m in a broken cross-sectional view a section of a fuel injection valve according to the invention;
- Figur 4 einen Schnitt entlang der Ebene IV-IV von Figur 3; und- Figure 4 is a section along the plane IV-IV of Figure 3; and
- Figur 5 in einem Diagramm den Offnungshub der Dusennadel eines herkömmlichen und eines erfmdungsgemaßen Kraftstoffeinspritzventils .- Figure 5 is a diagram of the opening stroke of the nozzle needle of a conventional and an inventive fuel injection valve.
Beschreibung der AusfuhrungsbeispieleDescription of the exemplary embodiments
In Figur 1 ist ein herkömmliches Kraftstoffeinspritzventil mit Steuerventil (siehe Figur 2) gezeigt. Das Kraftstoffeinspritzventil weist einen Ventilkorper 10 auf, m welchem eine Dusennadel 12 verschiebbar angebracht ist. Die Dusennadel 12 steuert das Einspritzen des Kraftstoffs in einen Zylinder einer (nicht dargestellten) Verbrennungskraftmaschine. Der zu- gefuhrte Kraftstoff übt auf die Dusennadel 12 eine Offnungs- kraft aus, welche die Dusennadel sowie ein Betatigungsteil 14, an dem sich die Dusennadel 12 abst tzt, zu einem Steuer- druckraum 16 hin zu verstellen sucht. Dem Steuerdruckraum 16 wird ebenfalls Kraftstoff zugef hrt, der aufgrund des im Steuerdruckraum 16 herrschenden Drucks eine Schließkraft auf das Betatigungsteil 14 ausübt. Der Kraftstoff wird über einen Zulauf 18 bereitgestellt, und vom Steuerdruckraum 16 geht ein Ablauf 20 ab, der zu einer Steuerkammer 22 eines Steuerventils 24 fuhrt. Für das Steuerventil 24 stellt der Ablauf 20 wiederum den Zulauf dar, und es ist ein Ablauf 26 vorgesehen, durch den der Kraftstoff aus dem Steuerdruckraum 16 und der Steuerkammer 22 abfließen kann .FIG. 1 shows a conventional fuel injection valve with a control valve (see FIG. 2). The fuel injection valve has a valve body 10, to which a nozzle needle 12 is slidably attached. The nozzle needle 12 controls the injection of the fuel into a cylinder of an internal combustion engine (not shown). The supplied fuel exerts an opening force on the nozzle needle 12, which tries to adjust the nozzle needle and an actuating part 14, on which the nozzle needle 12 is supported, to a control pressure chamber 16. The control pressure chamber 16 is also supplied with fuel, which exerts a closing force on the actuating part 14 due to the pressure prevailing in the control pressure chamber 16. The fuel is provided via an inlet 18, and an outlet 20 leads from the control pressure chamber 16 and leads to a control chamber 22 of a control valve 24. For the control valve 24, the outlet 20 in turn represents the inlet, and an outlet 26 is provided through which the fuel can flow out of the control pressure chamber 16 and the control chamber 22.
Das Steuerventil 24 weist m der Steuerkammer 22 eine Ventilnadel 28 auf, die mit einem Ventilsitz 30 zusammenwirkt. Wenn die Ventilnadel 28 am Ventilsitz 30 anliegt, ist das Steuerventil 24 geschlossen, so daß der über den Zulauf 18 der Steuerdruckraum 16 zugefuhrte Kraftstoff in dieser aufgestaut wird. Der auf diese Weise erzeugte hohe Druck übt auf das Betatigungsteil 14 eine Schließkraft auf, die großer ist als die auf die Dusennadel 12 wirkende Offnungskraft . Das Betatigungsteil 14 befindet sich somit m der Schließstellung, und das Kraftstoffeinspritzventil ist geschlossen. Wenn dagegen die Ventilnadel 28 vom Ventilsitz 30 abgehoben wird, kann der Kraftstoff aus dem Steuerdruckraum 16 über die Steuerka mer 22 und den Ablauf 26 abfließen, so daß der Druck im Steuerdruckraum absinkt. Die dann verringerte Schließkraft ermöglicht es dem Betatigungsteil, sich aus der Schließstellung m die Offnungsstellung zu verstellen, so daß die Dusennadel öffnet. Es wird nun Kraftstoff eingespritzt.The control valve 24 has in the control chamber 22 a valve needle 28 which interacts with a valve seat 30. When the valve needle 28 abuts the valve seat 30, the control valve 24 is closed, so that the fuel supplied via the inlet 18 to the control pressure chamber 16 is accumulated in the latter. The high pressure generated in this way exerts a closing force on the actuating part 14 which is greater than the opening force acting on the nozzle needle 12. The actuating part 14 is thus in the closed position and the fuel injection valve is closed. If, on the other hand, the valve needle 28 is lifted off the valve seat 30, the fuel can flow out of the control pressure chamber 16 via the control chamber 22 and the outlet 26, so that the pressure in the control pressure chamber drops. The then reduced closing force enables the actuating part to adjust the open position from the closed position m, so that the nozzle needle opens. Fuel is now injected.
Nachfolgend wird anhand der Figuren 3 und 4 ein erfindungsgemäßes Kraftstoffeinspritzventil beschrieben. Im Gegensatz zu dem bekannten Kraftstoffeinspritzventil ist bei dem erfindungsgemäßen Kraftstoffeinspritzventil der Zulauf 18 zum Steuerdruckraum 16 mit einer schlitzförmigen Mundungsoffnung 40 versehen. Diese ist so angeordnet, daß das bezuglich Figur 3 obere Ende des Betatigungsteils 14, wenn es sich ausgehend von der Schließstellung hin zur Offnungsstellung verstellt, die Mundungsoffnung 40 nach und nach abdeckt. In Figur 3 ist ein Zwischenzustand des Betatigungsteils 14 zwischen derA fuel injection valve according to the invention is described below with reference to FIGS. 3 and 4. In contrast to the known fuel injection valve, in the fuel injection valve according to the invention the inlet 18 to the control pressure chamber 16 has a slit-shaped mouth opening 40 provided. This is arranged in such a way that the upper end of the actuating part 14 in relation to FIG. 3, when it adjusts itself from the closed position to the open position, gradually covers the mouth opening 40. In Figure 3 is an intermediate state of the actuating part 14 between the
Schließstellung und der Offnungsstellung gezeigt, in der die Mundungsoffnung 40 knapp zur Hälfte abgedeckt ist. Aufgrund dieser Gestaltung ergibt sich, wenn das Steuerventil 30 öff¬ net und sich das Betatigungsteil 14 aufgrund des sich dann ergebenden Druckabfalls im Steuerdruckraum 16 in diesem verstellt, eine Drosselung des Zulaufs 18 zum Steuerdruckraum, was den Druckabfall in diesem beschleunigt. Somit ergibt sich eine schnellere Offnungsbewegung des Betatigungsteils 14 und folglich auch der Dusennadel 12.Shown closed position and the open position, in which the mouth 40 is covered almost half. Due to this design is obtained when the control valve 30 öff ¬ net and the actuating member 14 adjusted in this due to the then resulting pressure drop in the control pressure chamber 16, a throttling of the inlet 18 to the control pressure chamber, which accelerates the pressure drop therein. This results in a faster opening movement of the actuating part 14 and consequently also of the nozzle needle 12.
Dies ist in dem in Figur 5 gezeigten Diagramm zu sehen. Mit gestrichelten Linien ist der Hub der Dusennadel und somit der Einspritzverlauf für ein herkömmliches Kraftstoffeinspritz- ventil gezeigt. Es ist zu sehen, daß sich die Dusennadel ver- gleichsweise langsam öffnet. In der durchgezogenen Linie ist dagegen der Hub der Dusennadel und somit der Einspritzverlauf für ein erfindungsgemäßes Kraftstoffeinspritzventil gezeigt. Es ist zu sehen, daß ein progressiv ansteigender Hub erreicht wird, der insgesamt zu einem schnelleren Öffnen der Düsenna- del führt. Die zu Beginn des Nadeloffnens kleinere Nadelge- schwindigkeit ermöglicht eine präzisere Steuerung einer Voreinspritzung. This can be seen in the diagram shown in FIG. 5. The stroke of the nozzle needle and thus the injection curve for a conventional fuel injection valve are shown with dashed lines. It can be seen that the nozzle needle opens comparatively slowly. In contrast, the solid line shows the stroke of the nozzle needle and thus the course of the injection for a fuel injection valve according to the invention. It can be seen that a progressively increasing stroke is achieved, which leads overall to a faster opening of the nozzle needle. The lower needle speed at the start of needle opening enables more precise control of a pre-injection.

Claims

Anspr che Claims
1. Kraftstoffeinspritzventil mit einen Ventilkorper (10), einem darin ausgebildeten Steuerdruckraum (16), der an einer Seite von einem Betatigungsteil (14) für eine Dusennadel (12) verschlossen ist, das in dem Steuerdruckraum (16) zwischen einer Schließstellung und einer Offnungsstellung verschiebbar ist, einem Zulauf (18) zum Steuerdruckraum und mit einem Ablauf (20) aus dem Steuerdruckraum, der von einem Steuerventil (24) gesteuert wird, dadurch gekennzeichnet, daß die Mun- dungsoffnung (40) des Zulaufs (18) zum Steuerdruckraum so angeordnet ist, daß sie, wenn sich das Betatigungsteil (14) aus der Schließstellung in die Offnungsstellung verstellt, mindestens teilweise von dem Betätigungsteil (14) verschlossen wird.1. Fuel injection valve with a Ventilkorper (10), a control pressure chamber (16) formed therein, which is closed on one side by an actuating part (14) for a nozzle needle (12) in the control pressure chamber (16) between a closed position and an open position is displaceable, an inlet (18) to the control pressure chamber and with an outlet (20) from the control pressure chamber which is controlled by a control valve (24), characterized in that the mouth opening (40) of the inlet (18) to the control pressure chamber is arranged so that when the actuating part (14) moves from the closed position into the open position, it is at least partially closed by the actuating part (14).
2. Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Mundungsoffnung (40) einen schlitzförmigen Querschnitt aufweist. 2. Fuel injection valve according to claim 1, characterized in that the mouth opening (40) has a slit-shaped cross section.
EP00967524A 1999-08-25 2000-08-12 Fuel injection valve Withdrawn EP1125052A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19940301A DE19940301A1 (en) 1999-08-25 1999-08-25 Fuel injector
DE19940301 1999-08-25
PCT/DE2000/002736 WO2001014720A1 (en) 1999-08-25 2000-08-12 Fuel injection valve

Publications (1)

Publication Number Publication Date
EP1125052A1 true EP1125052A1 (en) 2001-08-22

Family

ID=7919555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00967524A Withdrawn EP1125052A1 (en) 1999-08-25 2000-08-12 Fuel injection valve

Country Status (7)

Country Link
US (1) US6619561B1 (en)
EP (1) EP1125052A1 (en)
JP (1) JP2003507645A (en)
KR (1) KR20010080894A (en)
DE (1) DE19940301A1 (en)
RU (1) RU2001113720A (en)
WO (1) WO2001014720A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131640A1 (en) * 2001-06-29 2003-01-16 Bosch Gmbh Robert Fuel injector with injection course shaping through switchable throttle elements
GB0801997D0 (en) * 2007-05-01 2008-03-12 Delphi Tech Inc Fuel injector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1232027B (en) * 1989-03-03 1992-01-23 Weber Srl IMPROVEMENT IN THE INJECTION DEVICES OF THE ELECTROMAGNETIC FUEL FOR DIESEL CYCLE ENGINES
JP2790676B2 (en) * 1989-10-02 1998-08-27 ヤマハ発動機株式会社 Air fuel injection type two-stroke engine
US5301875A (en) * 1990-06-19 1994-04-12 Cummins Engine Company, Inc. Force balanced electronically controlled fuel injector
IT1250900B (en) * 1991-12-24 1995-04-21 Elasis Sistema Ricerca Fiat ELECTROMAGNETICALLY OPERATED FUEL INJECTION VALVE.
IT1261149B (en) * 1993-12-30 1996-05-09 Elasis Sistema Ricerca Fiat DOSING VALVE FOR THE CONTROL OF THE SHUTTER OF A FUEL INJECTOR
DE19727896A1 (en) 1997-07-01 1999-01-07 Bosch Gmbh Robert Fuel injector
IT1296143B1 (en) * 1997-11-18 1999-06-09 Elasis Sistema Ricerca Fiat CONTROL DEVICE FOR A FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES.
DE19802244A1 (en) * 1998-01-22 1999-07-29 Bosch Gmbh Robert Fuel injection valve for IC engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0114720A1 *

Also Published As

Publication number Publication date
KR20010080894A (en) 2001-08-25
JP2003507645A (en) 2003-02-25
DE19940301A1 (en) 2001-03-01
US6619561B1 (en) 2003-09-16
WO2001014720A1 (en) 2001-03-01
RU2001113720A (en) 2003-04-10

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