EP1408230A1 - Fuel injector - Google Patents

Fuel injector Download PDF

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Publication number
EP1408230A1
EP1408230A1 EP03014372A EP03014372A EP1408230A1 EP 1408230 A1 EP1408230 A1 EP 1408230A1 EP 03014372 A EP03014372 A EP 03014372A EP 03014372 A EP03014372 A EP 03014372A EP 1408230 A1 EP1408230 A1 EP 1408230A1
Authority
EP
European Patent Office
Prior art keywords
control piston
push rod
injector
valve needle
pressure rod
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Withdrawn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
EP03014372A
Other languages
German (de)
French (fr)
Inventor
Daniel Koehler
Bernd Streicher
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 EP1408230A1 publication Critical patent/EP1408230A1/en
Withdrawn legal-status Critical Current

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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8038—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of adhesives, glue or the like
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to an injector according to the preamble of claim 1.
  • the Control piston in the injector housing is axially displaceable and limits one Control space.
  • the control piston points on its side facing away from the control chamber a blind hole in which one end of a push rod is received so that the push rod can tilt slightly relative to the control piston.
  • the Push rod acts on an axially displaceably guided at its other end Valve needle, which either closes the injection openings of the injector or releases a targeted injection of high pressure fuel to allow in the combustion chamber of the engine.
  • the Push rod can be made of a cheaper material that the can also withstand occurring stresses.
  • the choice of materials for Control piston and push rod can be customized to the respective application or load case.
  • the control piston and the push rod are shaped or non-positively or cohesively connected, e.g. together screwed, pressed, glued, welded, soldered, etc.
  • the single figure shows schematically a longitudinal section of the invention Injector.
  • the injector 1 shown in the figure is used for injecting fuel in an injection system of an internal combustion engine and has an injector housing 2 and a projecting into the combustion chamber of the internal combustion engine nozzle body 3 is fastened by means of a clamping nut 4 at the bottom of the injector housing. 2
  • the fuel is fed from an unillustrated central high-pressure accumulator (common rail) to an annular pressure chamber 5 of the nozzle body 3 .
  • a valve needle 6 is slidably mounted in an axial guide bore of the nozzle body 3 .
  • the valve needle 6 has in the area of the pressure chamber 5 a pressure shoulder 7 , on which the fuel pressure prevailing in the pressure chamber 5 acts in the opening direction (ie inwards).
  • the lower end of the valve needle 6 shown cut off in the figure, serves to open or close the spray holes (not shown) of the nozzle body 3 in order to enable a targeted injection of high-pressure fuel into the combustion chamber of the internal combustion engine.
  • a valve piece 8 is fastened with a central blind hole 9 , from the end surface of which a central drain hole 10 extends.
  • a central inlet bore 11 opens into the blind hole 9 .
  • the mouth region of the two bores 10, 11 of the blind hole 9 forms a control chamber 12 which is delimited by the end face of a control piston 13 .
  • the control piston 13 is guided axially displaceably at its upper end in the blind hole 9 and is attached with its lower end to a push rod 14 (connection point 15 ) which bears against the upper end face of the valve needle 6.
  • control piston 13 remains in its lower end position and prevents the opening of the push rod 14 Valve needle 6. If the control chamber 12 via the drain hole 10 with the Relief chamber is connected, the control piston 13 is in its upper end position displaceable, and the valve needle 6 opens when the prevailing in the pressure chamber 5 Fuel pressure is sufficient, the valve needle 6 against the action of a return spring to open.
  • the control piston 13 is made of a high quality material to prevent wear to minimize between control piston 13 and blind hole 9.
  • the push rod 14 consists of a less expensive material that the occurring Can also withstand stress.
  • the material selection for control pistons 13 and push rod 14 can be individually adapted to the respective application or Load case can be coordinated.
  • the control piston 13 and the push rod 14 are shaped or non-positively or cohesively connected, the central axes of both parts in must be in close tolerance.
  • the two parts can e.g. screwed together, pressed, glued, welded, soldered etc.
  • the end of the push rod 14 can be spherical in shape, so that the push rod 14 still all degrees of freedom in the radial direction has.

Landscapes

  • 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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Injector (1) for injecting fuel in an injection system of an internal combustion engine comprises a valve needle (6) and a control piston (13), which are each axially guided in the injector, and a pressure rod (14) via which the control piston acts on the valve needle. The control piston and the pressure rod are rigidly connected to each other. The control piston is made of a higher quality material than the pressure rod. Preferred Features: The control piston and the pressure rod are connected to each other by a force- or form-locking connection, preferably by pressing, or by a material connection, preferably by welding or gluing.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Injektor nach der Gattung des Patentanspruchs 1.The invention relates to an injector according to the preamble of claim 1.

Bei einem bekannten Injektor dieser Art (z.B. DE 100 20 867 A1) ist der Steuerkolben im Injektorgehäuse axial verschiebbar geführt und begrenzt einen Steuerraum. Auf seiner vom Steuerraum abgewandten Seite weist der Steuerkolben ein Sackloch auf, in dem das eine Ende einer Druckstange so aufgenommen ist, dass sich die Druckstange relativ zum Steuerkolben geringfügig neigen kann. Die Druckstange wirkt an ihrem anderen Ende auf eine axial verschiebbar geführte Ventilnadel, welche die Einspritzöffnungen des Injektors entweder verschließt oder freigibt, um eine gezielte Einspritzung von mit Hochdruck beaufschlagtem Kraftstoff in den Brennraum der Kraftmaschine zu ermöglichen.In a known injector of this type (e.g. DE 100 20 867 A1) the Control piston in the injector housing is axially displaceable and limits one Control space. The control piston points on its side facing away from the control chamber a blind hole in which one end of a push rod is received so that the push rod can tilt slightly relative to the control piston. The Push rod acts on an axially displaceably guided at its other end Valve needle, which either closes the injection openings of the injector or releases a targeted injection of high pressure fuel to allow in the combustion chamber of the engine.

Vorteile der ErfindungAdvantages of the invention

Beim erfindungsgemäßen Injektor ist der Einsatz des hochwertigeren Werkstoffes auf den Kontaktbereich des Steuerkolbens zu seiner Führung beschränkt. Die Druckstange kann aus einem kostengünstigeren Material bestehen, das die auftretenden Beanspruchungen ebenfalls aushalten kann. Die Werkstoffauswahl für Steuerkolben und Druckstange kann individuell auf den jeweiligen Anwendungs- bzw. Belastungsfall erfolgen. Der Steuerkolben und die Druckstange sind form- bzw. kraftschlüssig oder stoffschlüssig miteinander verbunden, z.B. miteinander verschraubt, verpresst, verklebt, verschweißt, verlötet, etc.In the injector according to the invention, the use of the higher quality material limited to the contact area of the control piston for its guidance. The Push rod can be made of a cheaper material that the can also withstand occurring stresses. The choice of materials for Control piston and push rod can be customized to the respective application or load case. The control piston and the push rod are shaped or non-positively or cohesively connected, e.g. together screwed, pressed, glued, welded, soldered, etc.

Der erfindungsgemäße Injektor hat insbesondere folgende Vorteile:

  • Werkstoffauswahl je nach technischer Anforderung frei wählbar;
  • Einsatz unterschiedlicher Fertigungsverfahren für Steuerkolben und Druckstange möglich (z.B. Kombination von Dreh- und Umformteil, etc.);
  • Baukastenprinzip möglich;
  • Einsatz ohne Umkonstruktion der restlichen Injektorbauteile möglich;
  • Umbau der bisherigen Montagelinien nicht erforderlich;
  • Reduzierung der Ausschusskosten durch Aufteilung der Präzisionsarbeitsgänge auf mehrere Bauteile;
  • Größere Auswahlmöglichkeit unter hochspezialisierten Zulieferern für die einzelnen Bauteile;
  • Auslegung des Steuerkolbens als Gelenkkolben möglich;
  • Kostenreduzierung.
The injector according to the invention has the following advantages in particular:
  • Choice of materials depending on technical requirements;
  • Different manufacturing methods for control piston and push rod can be used (eg combination of turned and formed part, etc.);
  • Modular principle possible;
  • Can be used without redesigning the remaining injector components;
  • Conversion of the previous assembly lines is not necessary;
  • Reduction of scrap costs by dividing the precision work steps over several components;
  • Greater choice among highly specialized suppliers for the individual components;
  • Interpretation of the control piston as articulated piston possible;
  • Cost reduction.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous configurations of the object of the invention can be found in the description, the drawing and the claims.

Zeichnungdrawing

Die einzige Figur zeigt schematisch einen Längsschnitt des erfindungsgemäßen Injektors.The single figure shows schematically a longitudinal section of the invention Injector.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Der in der Figur gezeigte Injektor 1 dient zur Einspritzung von Kraftstoff in einem Einspritzsystem einer Brennkraftmaschine und weist ein Injektorgehäuse 2 und einen in den Brennraum der Brennkraftmaschine ragenden Düsenkörper 3 auf, der mittels einer Spannmutter 4 unten am Injektorgehäuse 2 befestigt ist.The injector 1 shown in the figure is used for injecting fuel in an injection system of an internal combustion engine and has an injector housing 2 and a projecting into the combustion chamber of the internal combustion engine nozzle body 3 is fastened by means of a clamping nut 4 at the bottom of the injector housing. 2

Von einem nicht gezeigten zentralen Hochdruckspeicher (Common Rail) wird der Kraftstoff einem ringförmigen Druckraum 5 des Düsenköpers 3 zugeführt. In einer axialen Führungsbohrung des Düsenkörpers 3 ist eine Ventilnadel 6 verschiebbar gelagert. Die Ventilnadel 6 hat im Bereich des Druckraums 5 eine Druckschulter 7, an welcher der im Druckraum 5 herrschende Kraftstoffdruck im Öffnungssinn (d.h. nach innen) angreift. Das in der Figur abgeschnitten dargestellte untere Ende der Ventilnadel 6 dient dazu, nicht gezeigte Spritzlöcher des Düsenkörpers 3 zu öffnen oder zu schließen, um eine gezielte Einspritzung von mit Hochdruck beaufschlagtem Kraftstoff in den Brennraum der Brennkraftmaschine zu ermöglichen.The fuel is fed from an unillustrated central high-pressure accumulator (common rail) to an annular pressure chamber 5 of the nozzle body 3 . A valve needle 6 is slidably mounted in an axial guide bore of the nozzle body 3 . The valve needle 6 has in the area of the pressure chamber 5 a pressure shoulder 7 , on which the fuel pressure prevailing in the pressure chamber 5 acts in the opening direction (ie inwards). The lower end of the valve needle 6 , shown cut off in the figure, serves to open or close the spray holes (not shown) of the nozzle body 3 in order to enable a targeted injection of high-pressure fuel into the combustion chamber of the internal combustion engine.

Oben am Injektorgehäuse 2 ist ein Ventilstück 8 mit einem zentralen Sackloch 9 befestigt, von dessen Endfläche eine zentrale Ablaufbohrung 10 abgeht. Außerdem mündet in das Sackloch 9 eine zentrale Zulaufbohrung 11. Der Mündungsbereich der beiden Bohrungen 10, 11 des Sacklochs 9 bildet einen Steuerraum 12, der durch die Stirnfläche eines Steuerkolbens 13 begrenzt ist. Der Steuerkolben 13 ist an seinem oberen Ende im Sackloch 9 axial verschiebbar geführt und mit seinem unteren Ende an einer Druckstange 14 (Verbindungsstelle 15) befestigt, die an der oberen Stirnseite der Ventilnadel 6 anliegt.At the top of the injector housing 2 , a valve piece 8 is fastened with a central blind hole 9 , from the end surface of which a central drain hole 10 extends. In addition, a central inlet bore 11 opens into the blind hole 9 . The mouth region of the two bores 10, 11 of the blind hole 9 forms a control chamber 12 which is delimited by the end face of a control piston 13 . The control piston 13 is guided axially displaceably at its upper end in the blind hole 9 and is attached with its lower end to a push rod 14 (connection point 15 ) which bears against the upper end face of the valve needle 6.

Solange die Verbindung der Ablaufbohrung 10 zu einem nicht gezeigten Entlastungsraum gesperrt ist und der Steuerraum 12 über die Zulaufbohrung 11 mit Hochdruck beaufschlagtem Kraftstoff gefüllt ist, bleibt der Steuerkolben 13 in seiner unteren Endstellung und verhindert über die Druckstange 14 das Öffnen der Ventilnadel 6. Wenn der Steuerraum 12 über die Ablaufbohrung 10 mit dem Entlastungsraum verbunden wird, ist der Steuerkolben 13 in seine obere Endstellung verschiebbar, und die Ventilnadel 6 öffnet, wenn der im Druckraum 5 herrschende Kraftstoffdruck ausreicht, die Ventilnadel 6 gegen die Wirkung einer Rückstellfeder zu öffnen.As long as the connection of the drain hole 10 to a not shown Relief chamber is locked and the control chamber 12 via the inlet bore 11 High-pressure fuel is filled, the control piston 13 remains in its lower end position and prevents the opening of the push rod 14 Valve needle 6. If the control chamber 12 via the drain hole 10 with the Relief chamber is connected, the control piston 13 is in its upper end position displaceable, and the valve needle 6 opens when the prevailing in the pressure chamber 5 Fuel pressure is sufficient, the valve needle 6 against the action of a return spring to open.

Der Steuerkolben 13 besteht aus einem hochwertigen Material, um den Verschleiß zwischen Steuerkolben 13 und Sackloch 9 zu minimieren. Die Druckstange 14 besteht aus einem kostengünstigeren Material, das die auftretenden Beanspruchungen ebenfalls aushalten kann. Die Werkstoffauswahl für Steuerkolben 13 und Druckstange 14 kann individuell auf den jeweiligen Anwendungs- bzw. Belastungsfall abgestimmt werden.The control piston 13 is made of a high quality material to prevent wear to minimize between control piston 13 and blind hole 9. The push rod 14 consists of a less expensive material that the occurring Can also withstand stress. The material selection for control pistons 13 and push rod 14 can be individually adapted to the respective application or Load case can be coordinated.

Der Steuerkolben 13 und die Druckstange 14 sind miteinander form- bzw. kraftschlüssig oder stoffschlüssig verbunden, wobei die Mittelachsen beider Teile in enger Toleranz zueinander fluchten müssen. Die beiden Teile können z.B. miteinander verschraubt, verpresst, verklebt, verschweißt, verlötet etc. sein. Im Falle einer Verpressung kann das Ende der Druckstange 14 kugelförmig ausgebildet sein, so dass die Druckstange 14 weiterhin noch alle Freiheitsgrade in radialer Richtung besitzt.The control piston 13 and the push rod 14 are shaped or non-positively or cohesively connected, the central axes of both parts in must be in close tolerance. The two parts can e.g. screwed together, pressed, glued, welded, soldered etc. In the event of the end of the push rod 14 can be spherical in shape, so that the push rod 14 still all degrees of freedom in the radial direction has.

Claims (6)

Injektor (1) zur Einspritzung von Kraftstoff in einem Einspritzsystem einer Brennkraftmaschine, mit einer Ventilnadel (6) und einem Steuerkolben (13), die jeweils im Injektor (1) axial verschiebbar geführt sind, sowie mit einer Druckstange (14), über die der Steuerkolben (13) auf die Ventilnadel (6) wirkt,
dadurch gekennzeichnet, dass der Steuerkolben (13) und die Druckstange (14) miteinander starr verbunden sind und dass der Steuerkolben (13) aus einem hochwertigeren Material als die Druckstange (14) besteht.Injector (1) for injecting fuel in an injection system of an internal combustion engine, with a valve needle (6) and a control piston (13), which are each axially displaceably guided in the injector (1), and with a push rod (14) via which the Control piston (13) acts on the valve needle (6),
characterized in that the control piston (13) and the pressure rod (14) are rigidly connected to one another and that the control piston (13) is made of a higher quality material than the pressure rod (14). Injektor nach Anspruch 1, dadurch gekennzeichnet, dass der Steuerkolben (13) und die Druckstange (14) miteinander kraft- oder formschlüssig verbunden sind.Injector according to claim 1, characterized in that the control piston (13) and the push rod (14) are connected to one another in a non-positive or positive manner. Injektor nach Anspruch 2, dadurch gekennzeichnet, dass der Steuerkolben (13) und die Druckstange (14) miteinander verpresst sind.Injector according to claim 2, characterized in that the control piston (13) and the push rod (14) are pressed together. Injektor nach Anspruch 1, dadurch gekennzeichnet, dass der Steuerkolben (13) und die Druckstange (14) miteinander stoffschlüssig verbunden sind.Injector according to claim 1, characterized in that the control piston (13) and the push rod (14) are integrally connected to one another. Injektor nach Anspruch 4, dadurch gekennzeichnet, dass der Steuerkolben (13) und die Druckstange (14) miteinander verschweißt sind.Injector according to claim 4, characterized in that the control piston (13) and the push rod (14) are welded together. Injektor nach Anspruch 4, dadurch gekennzeichnet, dass der Steuerkolben (13) und die Druckstange (14) miteinander verklebt sind.Injector according to claim 4, characterized in that the control piston (13) and the push rod (14) are glued together.
EP03014372A 2002-10-11 2003-06-26 Fuel injector Withdrawn EP1408230A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002147571 DE10247571A1 (en) 2002-10-11 2002-10-11 Injector for the injection of fuel
DE10247571 2002-10-11

Publications (1)

Publication Number Publication Date
EP1408230A1 true EP1408230A1 (en) 2004-04-14

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ID=32010452

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Application Number Title Priority Date Filing Date
EP03014372A Withdrawn EP1408230A1 (en) 2002-10-11 2003-06-26 Fuel injector

Country Status (3)

Country Link
EP (1) EP1408230A1 (en)
JP (1) JP2004132377A (en)
DE (1) DE10247571A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009033964A1 (en) * 2007-09-12 2009-03-19 Robert Bosch Gmbh Leakage-free fuel injector with long nozzle needle
WO2011057863A1 (en) * 2009-11-10 2011-05-19 Robert Bosch Gmbh Method for producing a fuel injection valve, and fuel injection valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0690223A2 (en) * 1994-07-01 1996-01-03 ELASIS SISTEMA RICERCA FIAT NEL MEZZOGIORNO Società Consortile per Azioni Device for adjusting the travel of a fuel injector shutter
EP0778411A2 (en) * 1995-12-05 1997-06-11 Denso Corporation Solenoid valve and fuel injector for internal combustion engine using the same
EP0790402A2 (en) * 1996-02-13 1997-08-20 Isuzu Motors Limited Fuel injector for internal combustion engines
DE19650865A1 (en) * 1996-12-07 1998-06-10 Bosch Gmbh Robert magnetic valve
DE10020867A1 (en) * 2000-04-28 2001-10-31 Bosch Gmbh Robert Common-rail injector has nozzle needle end facing valve piston protruding into guide sleeve accommodating end of valve piston facing nozzle needle or pressure rod driven by valve piston

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0690223A2 (en) * 1994-07-01 1996-01-03 ELASIS SISTEMA RICERCA FIAT NEL MEZZOGIORNO Società Consortile per Azioni Device for adjusting the travel of a fuel injector shutter
EP0778411A2 (en) * 1995-12-05 1997-06-11 Denso Corporation Solenoid valve and fuel injector for internal combustion engine using the same
EP0790402A2 (en) * 1996-02-13 1997-08-20 Isuzu Motors Limited Fuel injector for internal combustion engines
DE19650865A1 (en) * 1996-12-07 1998-06-10 Bosch Gmbh Robert magnetic valve
DE10020867A1 (en) * 2000-04-28 2001-10-31 Bosch Gmbh Robert Common-rail injector has nozzle needle end facing valve piston protruding into guide sleeve accommodating end of valve piston facing nozzle needle or pressure rod driven by valve piston

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009033964A1 (en) * 2007-09-12 2009-03-19 Robert Bosch Gmbh Leakage-free fuel injector with long nozzle needle
WO2011057863A1 (en) * 2009-11-10 2011-05-19 Robert Bosch Gmbh Method for producing a fuel injection valve, and fuel injection valve
CN102597485A (en) * 2009-11-10 2012-07-18 罗伯特·博世有限公司 Method for producing a fuel injection valve, and fuel injection valve
JP2013510268A (en) * 2009-11-10 2013-03-21 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for manufacturing fuel injection valve and fuel injection valve

Also Published As

Publication number Publication date
DE10247571A1 (en) 2004-04-22
JP2004132377A (en) 2004-04-30

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