EP1062422B1 - Method for mounting a valve module of a fuel injector - Google Patents

Method for mounting a valve module of a fuel injector Download PDF

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Publication number
EP1062422B1
EP1062422B1 EP99955812A EP99955812A EP1062422B1 EP 1062422 B1 EP1062422 B1 EP 1062422B1 EP 99955812 A EP99955812 A EP 99955812A EP 99955812 A EP99955812 A EP 99955812A EP 1062422 B1 EP1062422 B1 EP 1062422B1
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EP
European Patent Office
Prior art keywords
valve
valve sleeve
sleeve
seat body
magnetic circuit
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.)
Expired - Lifetime
Application number
EP99955812A
Other languages
German (de)
French (fr)
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EP1062422A1 (en
Inventor
Klaus Noller
Hans Weidler
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
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1062422A1 publication Critical patent/EP1062422A1/en
Application granted granted Critical
Publication of EP1062422B1 publication Critical patent/EP1062422B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/16—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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body

Definitions

  • the invention relates to a method for assembling a Valve assembly of a fuel injector according to the Genus of claim 1.
  • Fuel injector which is an elongated, has thin-walled, non-magnetic sleeve, which in addition their jacket section still has a bottom section.
  • the bottom section runs largely perpendicular to the rest axial extension of the sleeve along the longitudinal axis of the valve.
  • A can be in a through opening of the sleeve Move valve needle axially.
  • a tight with the valve pin connected valve closing body works with one on one Provided valve seat surface together, wherein the valve seat body is pressed into the sleeve and directly or indirectly with a perforated disc on the Bottom portion of the sleeve abuts.
  • the sleeve is at least partially with surrounded by a plastic coating.
  • the inventive method for assembling a Valve assembly of a fuel injector with the characterizing features of claim 1 has the advantage that it is inexpensive in a simple manner feasible and thus a safe and reliable assembly of the fuel injector is guaranteed.
  • the magnetic flux conductive magnetic circuit component can be attached to the valve in a very simple manner without an additional joining process is to be used, whereby in advantageously on cohesive joining processes can be dispensed with. This eliminates all the disadvantages of processes to be carried out under heat, such as welding delay.
  • the Assembly of the valve is also simplified in that no tools for fastening the magnetic circuit component are needed.
  • FIG. 1 shows it Fuel injection valve with an inventive assembled valve assembly and Figure 2 according to the invention assembled valve assembly in a changed scale.
  • Electromagnetically actuated mounted according to the invention Valve in the form of an injector for Fuel injection systems from mixture-compressing, spark-ignited internal combustion engines has one of one Magnetic coil 1 surrounded, as an inner pole and partially as Largely tubular fuel flow serving Core 2.
  • the magnetic coil 1 is from an outer, sleeve-shaped and stepped, z.
  • the solenoid 1, the Core 2 and the valve jacket 5 together form an electrical excitable actuator.
  • the core 2 is in an inner, concentric to a longitudinal valve axis 10 extending opening 11 of the valve sleeve 6 introduced.
  • the e.g. ferritic valve sleeve 6 is elongated and thin-walled and has a jacket section 12 and a bottom portion 13, the shell portion 12 in Circumferential direction and the bottom portion 13 in the axial Direction at its downstream end the opening 11 limit.
  • the opening 11 also serves as a guide opening for one axially movable along the valve longitudinal axis 10 Valve needle 14.
  • valve seat body 15 which e.g. sits on the bottom portion 13 of the valve sleeve 6 and has a fixed valve seat surface 16 as a valve seat.
  • the Valve needle 14 is, for example, of a tubular Anchor section 17, also tubular Needle section 18 and a spherical Valve closing body 19 is formed, the Valve closing body 19 e.g. by means of a weld seam is connected to the needle section 18.
  • a flat spray plate 21 is arranged, the fixed Connection of valve seat body 15 and spray orifice plate 21 z. B.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a return spring 25 acting on the valve needle 14 or closing the injection valve is used electromagnetic circuit with the magnetic coil 1, the inner Core 2, the outer valve jacket 5 and the armature section 17.
  • the anchor section 17 is with the Valve closing body 19 facing away from the core 2 aligned.
  • the spherical valve closing body 19 interacts with the tapered in the direction of flow Valve seat surface 16 of the valve seat body 15 together, the in the axial direction downstream of a guide opening in Valve seat body 15 is formed.
  • the spray hole disc 21 has at least one, for example four through EDM, laser drilling or stamping molded Spray orifices 27.
  • the insertion depth of the core 2 in the injection valve is below other decisive for the stroke of the valve needle 14 the one end position of the valve needle 14 is not at excited solenoid 1 by the system of Valve closing body 19 on the valve seat surface 16 of the Valve seat body 15 set while the other End position of the valve needle 14 when the solenoid coil 1 is excited by the installation of the anchor section 17 on the downstream Core end results.
  • the stroke is set by a axial displacement of the chip, for example Process like turning manufactured core 2, according to the desired position with the Valve sleeve 6 is connected.
  • Flow bore 28 of the core 2 which is the supply of the Serves fuel in the direction of the valve seat surface 16 is in addition to the return spring 25, an adjusting element in the form an adjusting spring 29 inserted.
  • the adjusting spring 29 is used to adjust the spring preload on the Adjustment spring 29 adjacent return spring 25, which itself again with its opposite side on the Valve needle 14 supports, with an adjustment of the dynamic spray quantity with the setting spring 29.
  • the adjusting element can also be used instead of an adjusting spring be designed as adjusting bolts, adjusting sleeves etc.
  • the injection valve described so far stands out due to its particularly compact design, so that a very small, handy injection valve is created.
  • This Components form a pre-assembled, independent assembly, which is called functional part 30 below.
  • the Functional part 30 essentially comprises the electromagnetic circuit 1, 2, 5 and a sealing valve (Valve closing body 19, valve seat body 15) with a following jet processing element (spray orifice plate 21).
  • valve jacket 5 and the valve sleeve 6 formed and almost completely by the magnetic coil 1 filled coil space is in the valve seat body 15 facing direction through a stepped radial region 32 of the valve jacket 5 limited, while the conclusion on the the side facing away from the valve seat body 15 by a disc-shaped cover element 33 is guaranteed.
  • this is from the Extends through coil body 3.
  • a second is completely independent of the functional part 30 Assembled assembly, which in the following as a connecting part 40th referred to as.
  • the connecting part 40 draws out all things in that it is the electrical and the hydraulic connection of the fuel injector includes.
  • the largely designed as a plastic part Connector 40 therefore has a Tubular base body serving fuel inlet connection 42.
  • Flow bore 43 of an inner tube 44 in the base body 42 by the upstream end of the Fuel injector in the axial direction from Flows through fuel is, for example Fuel filter 45 inserted or pressed.
  • a hydraulic connection of connector 40 and Functional part 30 is in the fully assembled Fuel injector achieved by the Flow bores 43 and 28 of the two assemblies to one another brought that an unimpeded flow through the Fuel is guaranteed.
  • An inner opening 46 in Cover element 33 allows the valve sleeve 6 and thus also design the core 2 so that both the opening 46 protrude and at least the valve sleeve 6 towards Connection part 40 clearly over the cover element 33 also available.
  • When mounting the connector 40 on the Functional part 30 protrudes a lower end 47 of tube 44 in the protruding part of the valve sleeve 6 to increase the Connection stability in the opening 11 of the valve sleeve 6 into it.
  • the base body 42 is seated in the assembled state for example on the cover element 33 and the upper end of the valve jacket 5.
  • the base body 42 also includes a molded part electrical connector 56.
  • the electrical Contact elements 55 end at one end as Exposed contact pins of the electrical connector 56, with a corresponding not shown electrical connection element, such as. B. one Contact strip, for complete electrical contacting of the injection valve can be connected.
  • a corresponding not shown electrical connection element such as. B. one Contact strip, for complete electrical contacting of the injection valve can be connected.
  • the Connectors 56 opposite end form the Contact elements 55 an electrical connection with the corresponding contact pins 34.
  • FIG. 2 shows a mountable according to the invention Shown valve assembly, this valve assembly in essentially of the valve jacket 5, the valve sleeve 6 and the valve seat body 15 is formed.
  • the valve seat body 15 and the core 2 in the inner opening 11 of the valve sleeve 6 arranged while the solenoid 1 and the valve jacket 5th as an external magnetic circuit component on the outer circumference of the Valve sleeve 6 can be arranged.
  • the valve jacket 5 is designed such that it has a jacket-like shape Sheath area 58 encompassing the coil space and another to the valve seat body 15 extending fastening area 59 has.
  • the two areas 58 and 59 differ in their Diameter. While the cladding area 58 clearly larger diameter than the valve sleeve 6 to form the Coil space and thus to accommodate the magnetic coil 1 including the bobbin 3 is the Fastening area 59 only with a slightly larger one Inner diameter as the outer diameter of the valve sleeve 6 educated. Between the jacket area 58 and the The radial region 32 is located in the fastening region 59.
  • valve sleeve 6 is used to assemble the Valve assembly first the valve jacket 5 on the Valve sleeve 6 pushed on.
  • the valve sleeve 6 and the valve jacket 5 such tolerated dimensions that a loose sliding without burr formation is guaranteed.
  • the valve jacket 5 on the Valve sleeve 6 held in the desired position.
  • the valve seat body 15 into the inner Opening 11 of the valve sleeve 6 in the downstream direction inserted or pressed in due to its external dimensions.
  • the valve seat body 15 to Pushed against the bottom section 13 of the valve sleeve 6. It is also conceivable, the valve sleeve 6 without Form bottom portion 13 and the valve seat body 15 to be arranged further upstream in the valve sleeve 6.
  • valve seat body 15 In the axial extent of the fastening area 59 of the valve jacket 5 is in the inner opening 11 of the Valve sleeve 6 e.g. a paragraph 60 provided by a minimal change in inner diameter arises.
  • valve seat body 15 By the valve seat body 15 is pressed in Widening at least in this section of the valve sleeve 6.
  • the valve seat body 15 receives an end position within the valve sleeve 6, in which it axially overlaps with the Fastening area 59 of the valve jacket 5 remains. Alone by pressing the valve seat body 15 is on this Way a firm connection of valve sleeve 6 and Valve jacket 5 achieved.
  • Valve seat body 15 and fastening area 59 of the Valve jacket 5 is a permanent radial pressure and a sufficient tension that allows one to additional joining process, e.g. Welding or flanging too dispense.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils nach der Gattung des Anspruchs 1.The invention relates to a method for assembling a Valve assembly of a fuel injector according to the Genus of claim 1.

Aus der US-PS 4,946,107 ist bereits ein elektromagnetisch betätigbares Brennstoffeinspritzventil bekannt, das unter anderem eine unmagnetische Hülse als Verbindungsteil zwischen einem Kern und einem Ventilsitzkörper aufweist. Mit ihren beiden axialen Enden ist die Hülse fest mit dem Kern und mit dem Ventilsitzkörper verbunden. Die Hülse verläuft über ihre gesamte axiale Länge mit einem konstanten Außendurchmesser und einem konstanten Innendurchmesser und besitzt entsprechend an ihren beiden Enden gleich große Eintrittsöffnungen. Der Kern und der Ventilsitzkörper sind mit einem solchen Außendurchmesser ausgebildet, dass sie in die Hülse an den beiden Enden hineinreichen, so dass die Hülse die beiden Bauteile Kern und Ventilsitzkörper in diesen hineinragenden Bereichen vollständig umgibt. Im Inneren der Hülse bewegt sich in axialer Richtung eine Ventilnadel mit einem Anker, der durch die Hülse geführt wird. Die festen Verbindungen der Hülse mit dem Kern und dem Ventilsitzkörper werden z. B. mittels Schweißen erzielt, so wie es auch aus der DE-OS 43 10 819 bekannt ist. Auch hier wird eine dünnwandige, unmagnetische Hülse als Verbindungsteil zwischen Kern und Ventilsitzkörper eines Brennstoffeinspritzventils verwendet. Von der konstruktiven Ausgestaltung her entspricht diese Hülse weitgehend der aus der US-PS 4,946,107 bekannten Hülse. Mit Hilfe der rohrförmigen Hülsen lassen sich das Volumen und das Gewicht der Brennstoffeinspritzventile reduzieren.From US Pat. No. 4,946,107 there is already an electromagnetic one Actuable fuel injector known that under other a non-magnetic sleeve as a connecting part has between a core and a valve seat body. With the two axial ends of the sleeve are fixed to the core and connected to the valve seat body. The sleeve runs over their entire axial length with a constant Outside diameter and a constant inside diameter and has the same size at both ends Inlet openings. The core and the valve seat body are formed with such an outer diameter that they in extend the sleeve at both ends so that the Sleeve the two components core and valve seat body in completely surrounds these protruding areas. in the Inside the sleeve moves in the axial direction Valve needle with an anchor that is guided through the sleeve becomes. The fixed connections of the sleeve to the core and the Valve seat bodies are e.g. B. achieved by welding, so as is also known from DE-OS 43 10 819. Here too becomes a thin-walled, non-magnetic sleeve as Connection part between core and valve seat body one Fuel injector used. From the constructive Design ago this sleeve largely corresponds to the the sleeve known from US Pat. No. 4,946,107. With the help of tubular sleeves can be the volume and weight of fuel injectors.

Bekannt ist aus der DE-OS 195 47 406 außerdem ein Brennstoffeinspritzventil, das eine langgestreckte, dünnwandige, nichtmagnetische Hülse aufweist, die neben ihrem Mantelabschnitt noch einen Bodenabschnitt besitzt. Der Bodenabschnitt verläuft weitgehend senkrecht zur ansonsten axialen Erstreckung der Hülse entlang der Ventillängsachse. In einer Durchgangsöffnung der Hülse kann sich eine Ventilnadel axial bewegen. Ein fest mit der Ventilnadel verbundener Ventilschließkörper wirkt mit einer an einem Ventilsitzkörper vorgesehenen Ventilsitzfläche zusammen, wobei der Ventilsitzkörper in der Hülse eingepresst ist und direkt oder indirekt mit einer Lochscheibe an dem Bodenabschnitt der Hülse anliegt. Zur Herstellung des fertigen Ventils wird die Hülse zumindest teilweise mit einer Kunststoffumspritzung umgeben.It is also known from DE-OS 195 47 406 Fuel injector which is an elongated, has thin-walled, non-magnetic sleeve, which in addition their jacket section still has a bottom section. The The bottom section runs largely perpendicular to the rest axial extension of the sleeve along the longitudinal axis of the valve. A can be in a through opening of the sleeve Move valve needle axially. A tight with the valve pin connected valve closing body works with one on one Provided valve seat surface together, wherein the valve seat body is pressed into the sleeve and directly or indirectly with a perforated disc on the Bottom portion of the sleeve abuts. To make the finished valve, the sleeve is at least partially with surrounded by a plastic coating.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Verfahren zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass es auf einfache Art und Weise kostengünstig durchführbar und damit eine sichere und zuverlässige Montage des Brennstoffeinspritzventils gewährleistet ist. Ein äußeres, den Magnetfluss leitendes Magnetkreisbauteil ist auf sehr einfache Weise im Ventil befestigbar, ohne dass eine zusätzliches Fügeverfahren anzuwenden ist, wobei in vorteilhafter Weise auf stoffschlüssige Fügeverfahren verzichtet werden kann. Somit entfallen alle Nachteile von unter Wärme vorzunehmenden Verfahren, wie Schweißverzug. Die Montage des Ventils ist auch insofern vereinfacht, dass keine Werkzeuge zum Befestigen des Magnetkreisbauteils benötigt werden.The inventive method for assembling a Valve assembly of a fuel injector with the characterizing features of claim 1 has the advantage that it is inexpensive in a simple manner feasible and thus a safe and reliable assembly of the fuel injector is guaranteed. On outer, the magnetic flux conductive magnetic circuit component can be attached to the valve in a very simple manner without an additional joining process is to be used, whereby in advantageously on cohesive joining processes can be dispensed with. This eliminates all the disadvantages of processes to be carried out under heat, such as welding delay. The Assembly of the valve is also simplified in that no tools for fastening the magnetic circuit component are needed.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Verfahrens zur Montage einer Ventilbaugruppe eines Brennstoffeinspritzventils möglich.By the measures listed in the subclaims advantageous developments and improvements in Claim 1 specified method for mounting a Valve assembly of a fuel injector possible.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein Brennstoffeinspritzventil mit einer erfindungsgemäß montierten Ventilbaugruppe und Figur 2 die erfindungsgemäß montierte Ventilbaugruppe in einem veränderten Maßstab.An embodiment of the invention is in the drawing shown in simplified form and in the following Description explained in more detail. 1 shows it Fuel injection valve with an inventive assembled valve assembly and Figure 2 according to the invention assembled valve assembly in a changed scale.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Das in der Figur 1 beispielhaft dargestellte, erfindungsgemäß montierte elektromagnetisch betätigbare Ventil in der Form eines Einspritzventils für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen hat einen von einer Magnetspule 1 umgebenen, als Innenpol und teilweise als Brennstoffdurchfluss dienenden weitgehend rohrförmigen Kern 2. Die Magnetspule 1 ist von einem äußeren, hülsenförmigen und gestuft ausgeführten, z. B. ferromagnetischen Ventilmantel 5, der ein als Außenpol dienendes äußeres Magnetkreisbauteil darstellt, in Umfangsrichtung vollständig umgeben. Die Magnetspule 1, der Kern 2 und der Ventilmantel 5 bilden zusammen ein elektrisch erregbares Betätigungselement.The example shown in FIG. 1 Electromagnetically actuated mounted according to the invention Valve in the form of an injector for Fuel injection systems from mixture-compressing, spark-ignited internal combustion engines has one of one Magnetic coil 1 surrounded, as an inner pole and partially as Largely tubular fuel flow serving Core 2. The magnetic coil 1 is from an outer, sleeve-shaped and stepped, z. B. ferromagnetic valve jacket 5, the one as an external pole serving external magnetic circuit component, in Completely surround the circumferential direction. The solenoid 1, the Core 2 and the valve jacket 5 together form an electrical excitable actuator.

Während die in einem Spulenkörper 3 eingebettete Magnetspule 1 eine Ventilhülse 6 von außen umgibt, ist der Kern 2 in einer inneren, konzentrisch zu einer Ventillängsachse 10 verlaufenden Öffnung 11 der Ventilhülse 6 eingebracht. Die z.B. ferritische Ventilhülse 6 ist langgestreckt und dünnwandig ausgeführt und besitzt einen Mantelabschnitt 12 und einen Bodenabschnitt 13, wobei der Mantelabschnitt 12 in Umfangsrichtung und der Bodenabschnitt 13 in axialer Richtung an ihrem stromabwärtigen Ende die Öffnung 11 begrenzen. Die Öffnung 11 dient auch als Führungsöffnung für eine entlang der Ventillängsachse 10 axial bewegliche Ventilnadel 14.While the magnet coil embedded in a coil body 3 1 surrounds a valve sleeve 6 from the outside, the core 2 is in an inner, concentric to a longitudinal valve axis 10 extending opening 11 of the valve sleeve 6 introduced. The e.g. ferritic valve sleeve 6 is elongated and thin-walled and has a jacket section 12 and a bottom portion 13, the shell portion 12 in Circumferential direction and the bottom portion 13 in the axial Direction at its downstream end the opening 11 limit. The opening 11 also serves as a guide opening for one axially movable along the valve longitudinal axis 10 Valve needle 14.

Neben dem Kern 2 und der Ventilnadel 14 ist in der Öffnung 11 des weiteren ein Ventilsitzkörper 15 angeordnet, der z.B. auf dem Bodenabschnitt 13 der Ventilhülse 6 aufsitzt und eine feste Ventilsitzfläche 16 als Ventilsitz aufweist. Die Ventilnadel 14 wird beispielsweise von einem rohrförmigen Ankerabschnitt 17, einem ebenfalls rohrförmigen Nadelabschnitt 18 und einem kugelförmigen Ventilschließkörper 19 gebildet, wobei der Ventilschließkörper 19 z.B. mittels einer Schweißnaht fest mit dem Nadelabschnitt 18 verbunden ist. An der stromabwärtigen Stirnseite des Ventilsitzkörpers 15 ist z. B. in einer kegelstumpfförmig verlaufenden Vertiefung 20 eine flache Spritzlochscheibe 21 angeordnet, wobei die feste Verbindung von Ventilsitzkörper 15 und Spritzlochscheibe 21 z. B. durch eine umlaufende dichte Schweißnaht realisiert ist. Im Nadelabschnitt 18 der Ventilnadel 14 sind eine oder mehrere Queröffnungen 22 vorgesehen, so dass den Ankerabschnitt 17 in einer inneren Längsbohrung 23 durchströmender Brennstoff nach außen treten und am Ventilschließkörper 19 z.B. an Abflachungen 24 entlang bis zur Ventilsitzfläche 16 strömen kann.In addition to the core 2 and the valve needle 14 is in the opening 11 further arranged a valve seat body 15 which e.g. sits on the bottom portion 13 of the valve sleeve 6 and has a fixed valve seat surface 16 as a valve seat. The Valve needle 14 is, for example, of a tubular Anchor section 17, also tubular Needle section 18 and a spherical Valve closing body 19 is formed, the Valve closing body 19 e.g. by means of a weld seam is connected to the needle section 18. At the is downstream end of the valve seat body 15 z. B. in a frustoconical recess 20 a flat spray plate 21 is arranged, the fixed Connection of valve seat body 15 and spray orifice plate 21 z. B. realized by a circumferential dense weld is. In the needle section 18 of the valve needle 14 there are one or several transverse openings 22 are provided so that the Anchor section 17 in an inner longitudinal bore 23 fuel flowing through to the outside and on Valve closing body 19 e.g. along flats 24 to can flow to the valve seat surface 16.

Die Betätigung des Einspritzventils erfolgt in bekannter Weise elektromagnetisch. Zur axialen Bewegung der Ventilnadel 14 und damit zum Öffnen entgegen der Federkraft einer an der Ventilnadel 14 angreifenden Rückstellfeder 25 bzw. Schließen des Einspritzventils dient der elektromagnetische Kreis mit der Magnetspule 1, dem inneren Kern 2, dem äußeren Ventilmantel 5 und dem Ankerabschnitt 17. Der Ankerabschnitt 17 ist mit dem dem Ventilschließkörper 19 abgewandten Ende auf den Kern 2 ausgerichtet.The injection valve is actuated in a known manner Way electromagnetic. For the axial movement of the Valve needle 14 and thus to open against the spring force a return spring 25 acting on the valve needle 14 or closing the injection valve is used electromagnetic circuit with the magnetic coil 1, the inner Core 2, the outer valve jacket 5 and the armature section 17. The anchor section 17 is with the Valve closing body 19 facing away from the core 2 aligned.

Der kugelförmige Ventilschließkörper 19 wirkt mit der sich in Strömungsrichtung kegelstumpfförmig verjüngenden Ventilsitzfläche 16 des Ventilsitzkörpers 15 zusammen, die in axialer Richtung stromabwärts einer Führungsöffnung im Ventilsitzkörper 15 ausgebildet ist. Die Spritzlochscheibe 21 besitzt wenigstens eine, beispielsweise vier durch Erodieren, Laserbohren oder Stanzen ausgeformte Abspritzöffnungen 27.The spherical valve closing body 19 interacts with the tapered in the direction of flow Valve seat surface 16 of the valve seat body 15 together, the in the axial direction downstream of a guide opening in Valve seat body 15 is formed. The spray hole disc 21 has at least one, for example four through EDM, laser drilling or stamping molded Spray orifices 27.

Die Einschubtiefe des Kerns 2 im Einspritzventil ist unter anderem entscheidend für den Hub der Ventilnadel 14. Dabei ist die eine Endstellung der Ventilnadel 14 bei nicht erregter Magnetspule 1 durch die Anlage des Ventilschließkörpers 19 an der Ventilsitzfläche 16 des Ventilsitzkörpers 15 festgelegt, während sich die andere Endstellung der Ventilnadel 14 bei erregter Magnetspule 1 durch die Anlage des Ankerabschnitts 17 am stromabwärtigen Kernende ergibt. Die Hubeinstellung erfolgt durch ein axiales Verschieben des beispielsweise durch ein spanendes Verfahren wie Drehen hergestellten Kerns 2, der entsprechend der gewünschten Position nachfolgend fest mit der Ventilhülse 6 verbunden wird.The insertion depth of the core 2 in the injection valve is below other decisive for the stroke of the valve needle 14 the one end position of the valve needle 14 is not at excited solenoid 1 by the system of Valve closing body 19 on the valve seat surface 16 of the Valve seat body 15 set while the other End position of the valve needle 14 when the solenoid coil 1 is excited by the installation of the anchor section 17 on the downstream Core end results. The stroke is set by a axial displacement of the chip, for example Process like turning manufactured core 2, according to the desired position with the Valve sleeve 6 is connected.

In eine konzentrisch zu der Ventillängsachse 10 verlaufende Strömungsbohrung 28 des Kerns 2, die der Zufuhr des Brennstoffs in Richtung der Ventilsitzfläche 16 dient, ist außer der Rückstellfeder 25 ein Einstellelement in der Form einer Einstellfeder 29 eingeschoben. Die Einstellfeder 29 dient zur Einstellung der Federvorspannung der an der Einstellfeder 29 anliegenden Rückstellfeder 25, die sich wiederum mit ihrer gegenüberliegenden Seite an der Ventilnadel 14 abstützt, wobei auch eine Einstellung der dynamischen Abspritzmenge mit der Einstellfeder 29 erfolgt. Das Einstellelement kann auch anstelle einer Einstellfeder als Einstellbolzen, Einstellhülse usw. ausgeführt sein.In a concentric to the valve longitudinal axis 10 Flow bore 28 of the core 2, which is the supply of the Serves fuel in the direction of the valve seat surface 16 is in addition to the return spring 25, an adjusting element in the form an adjusting spring 29 inserted. The adjusting spring 29 is used to adjust the spring preload on the Adjustment spring 29 adjacent return spring 25, which itself again with its opposite side on the Valve needle 14 supports, with an adjustment of the dynamic spray quantity with the setting spring 29. The adjusting element can also be used instead of an adjusting spring be designed as adjusting bolts, adjusting sleeves etc.

Das bis hierher beschriebene Einspritzventil zeichnet sich durch seinen besonders kompakten Aufbau aus, so dass ein sehr kleines, handliches Einspritzventil entsteht. Diese Bauteile bilden eine vormontierte eigenständige Baugruppe, die nachfolgend Funktionsteil 30 genannt wird. Das Funktionsteil 30 umfaßt also im wesentlichen den elektromagnetischen Kreis 1, 2, 5 sowie ein Dichtventil (Ventilschließkörper 19, Ventilsitzkörper 15) mit einem nachfolgenden Strahlaufbereitungselement (Spritzlochscheibe 21).The injection valve described so far stands out due to its particularly compact design, so that a very small, handy injection valve is created. This Components form a pre-assembled, independent assembly, which is called functional part 30 below. The Functional part 30 essentially comprises the electromagnetic circuit 1, 2, 5 and a sealing valve (Valve closing body 19, valve seat body 15) with a following jet processing element (spray orifice plate 21).

Der zwischen dem Ventilmantel 5 und der Ventilhülse 6 gebildete und durch die Magnetspule 1 fast vollständig ausgefüllte Spulenraum ist in dem Ventilsitzkörper 15 zugewandter Richtung durch einen gestuften Radialbereich 32 des Ventilmantels 5 begrenzt, während der Abschluss auf der dem Ventilsitzkörper 15 abgewandten Seite durch ein scheibenförmiges Abdeckelement 33 gewährleistet ist. In einer Ausnehmung des Abdeckelements 33 wird dieses von dem Spulenkörper 3 durchragt. In diesem Bereich stehen beispielsweise zwei Kontaktstifte 34 aus dem Kunststoff des Spulenkörpers 3 heraus. Über die elektrischen Kontaktstifte 34 erfolgt die elektrische Kontaktierung der Magnetspule 1 und damit deren Erregung.The between the valve jacket 5 and the valve sleeve 6 formed and almost completely by the magnetic coil 1 filled coil space is in the valve seat body 15 facing direction through a stepped radial region 32 of the valve jacket 5 limited, while the conclusion on the the side facing away from the valve seat body 15 by a disc-shaped cover element 33 is guaranteed. In a recess of the cover member 33, this is from the Extends through coil body 3. Stand in this area For example, two contact pins 34 made of plastic Bobbin 3 out. Via the electrical contact pins 34 the electrical contacting of the magnetic coil 1 takes place and with it their excitement.

Völlig unabhängig vom Funktionsteil 30 wird eine zweite Baugruppe hergestellt, die im folgenden als Anschlussteil 40 bezeichnet wird. Das Anschlussteil 40 zeichnet sich vor allen Dingen dadurch aus, dass es den elektrischen und den hydraulischen Anschluss des Brennstoffeinspritzventils umfaßt. Das weitgehend als Kunststoffteil ausgeführte Anschlussteil 40 besitzt deshalb einen als Brennstoffeinlassstutzen dienenden rohrförmigen Grundkörper 42. In eine konzentrisch zur Ventillängsachse 10 verlaufende Strömungsbohrung 43 eines inneren Rohres 44 im Grundkörper 42, die von dem zuströmseitigen Ende des Brennstoffeinspritzventils aus in axialer Richtung vom Brennstoff durchströmt wird, ist beispielsweise ein Brennstofffilter 45 eingeschoben oder eingepresst.A second is completely independent of the functional part 30 Assembled assembly, which in the following as a connecting part 40th referred to as. The connecting part 40 draws out all things in that it is the electrical and the hydraulic connection of the fuel injector includes. The largely designed as a plastic part Connector 40 therefore has a Tubular base body serving fuel inlet connection 42. In a concentric to the longitudinal axis 10 of the valve Flow bore 43 of an inner tube 44 in the base body 42 by the upstream end of the Fuel injector in the axial direction from Flows through fuel is, for example Fuel filter 45 inserted or pressed.

Eine hydraulische Verbindung von Anschlussteil 40 und Funktionsteil 30 wird beim vollständig montierten Brennstoffeinspritzventil dadurch erreicht, dass die Strömungsbohrungen 43 und 28 beider Baugruppen so zueinander gebracht werden, dass ein ungehindertes Durchströmen des Brennstoffs gewährleistet ist. Eine innere Öffnung 46 im Abdeckelement 33 erlaubt es, die Ventilhülse 6 und somit auch den Kern 2 so auszubilden, dass beide die Öffnung 46 durchragen und zumindest die Ventilhülse 6 in Richtung zum Anschlussteil 40 deutlich über das Abdeckelement 33 hinaussteht. Bei der Montage des Anschlussteils 40 an dem Funktionsteil 30 ragt ein unteres Ende 47 des Rohres 44 in den überstehenden Teil der Ventilhülse 6 zur Erhöhung der Verbindungsstabilität in die Öffnung 11 der Ventilhülse 6 hinein. Der Grundkörper 42 sitzt im montierten Zustand beispielsweise auf dem Abdeckelement 33 und dem oberen Ende des Ventilmantels 5 auf.A hydraulic connection of connector 40 and Functional part 30 is in the fully assembled Fuel injector achieved by the Flow bores 43 and 28 of the two assemblies to one another brought that an unimpeded flow through the Fuel is guaranteed. An inner opening 46 in Cover element 33 allows the valve sleeve 6 and thus also design the core 2 so that both the opening 46 protrude and at least the valve sleeve 6 towards Connection part 40 clearly over the cover element 33 also available. When mounting the connector 40 on the Functional part 30 protrudes a lower end 47 of tube 44 in the protruding part of the valve sleeve 6 to increase the Connection stability in the opening 11 of the valve sleeve 6 into it. The base body 42 is seated in the assembled state for example on the cover element 33 and the upper end of the valve jacket 5.

Außerdem sind im Anschlussteil 40 zwei elektrische Kontaktelemente 55 vorgesehen, die während des Kunststoffspritzgussprozesses des Grundkörpers 42 umspritzt werden und nachfolgend im Kunststoff eingebettet vorliegen. Zu dem Grundkörper 42 gehört auch ein mitangespritzter elektrischer Anschlussstecker 56. Die elektrischen Kontaktelemente 55 enden an ihrem einen Ende als freiliegende Kontaktpins des elektrischen Anschlusssteckers 56, der mit einem entsprechenden nicht gezeigten elektrischen Anschlusselement, wie z. B. einer Kontaktleiste, zur vollständigen elektrischen Kontaktierung des Einspritzventils verbunden werden kann. An ihrem dem Anschlussstecker 56 gegenüberliegenden Ende bilden die Kontaktelemente 55 eine elektrische Verbindung mit den korrespondierenden Kontaktstiften 34.In addition, there are two electrical connections 40 Contact elements 55 provided during the Injection molded plastic process of the base body 42 and are then embedded in the plastic. The base body 42 also includes a molded part electrical connector 56. The electrical Contact elements 55 end at one end as Exposed contact pins of the electrical connector 56, with a corresponding not shown electrical connection element, such as. B. one Contact strip, for complete electrical contacting of the injection valve can be connected. At their the Connectors 56 opposite end form the Contact elements 55 an electrical connection with the corresponding contact pins 34.

In der Figur 2 ist eine erfindungsgemäß montierbare Ventilbaugruppe dargestellt, wobei diese Ventilbaugruppe im wesentlichen von dem Ventilmantel 5, der Ventilhülse 6 und dem Ventilsitzkörper 15 gebildet wird. Wie bereits anhand der Figur 1 beschrieben, werden der Ventilsitzkörper 15 und der Kern 2 in der inneren Öffnung 11 der Ventilhülse 6 angeordnet, während die Magnetspule 1 und der Ventilmantel 5 als äußeres Magnetkreisbauteil am äußeren Umfang der Ventilhülse 6 angeordnet werden. Der Ventilmantel 5 ist derart ausgestaltet, dass er einen mantelförmig den Spulenraum umgreifenden Mantelbereich 58 und einen weiter zum Ventilsitzkörper 15 hin verlaufenden Befestigungsbereich 59 aufweist. FIG. 2 shows a mountable according to the invention Shown valve assembly, this valve assembly in essentially of the valve jacket 5, the valve sleeve 6 and the valve seat body 15 is formed. As already based on 1, the valve seat body 15 and the core 2 in the inner opening 11 of the valve sleeve 6 arranged while the solenoid 1 and the valve jacket 5th as an external magnetic circuit component on the outer circumference of the Valve sleeve 6 can be arranged. The valve jacket 5 is designed such that it has a jacket-like shape Sheath area 58 encompassing the coil space and another to the valve seat body 15 extending fastening area 59 has.

Die beiden Bereiche 58 und 59 unterscheiden sich in ihrem Durchmesser. Während der Mantelbereich 58 einen deutlich größeren Durchmesser als die Ventilhülse 6 zur Bildung des Spulenraums und damit zur Aufnahme der Magnetspule 1 einschließlich des Spulenkörpers 3 besitzt, ist der Befestigungsbereich 59 nur mit einem geringfügig größeren Innendurchmesser als der Außendurchmesser der Ventilhülse 6 ausgebildet. Zwischen dem Mantelbereich 58 und dem Befestigungsbereich 59 befindet sich der Radialbereich 32.The two areas 58 and 59 differ in their Diameter. While the cladding area 58 clearly larger diameter than the valve sleeve 6 to form the Coil space and thus to accommodate the magnetic coil 1 including the bobbin 3 is the Fastening area 59 only with a slightly larger one Inner diameter as the outer diameter of the valve sleeve 6 educated. Between the jacket area 58 and the The radial region 32 is located in the fastening region 59.

Erfindungsgemäß wird zur Montage der beschriebenen Ventilbaugruppe zuerst der Ventilmantel 5 auf die Ventilhülse 6 aufgeschoben. Dabei besitzen die Ventilhülse 6 und der Ventilmantel 5 solche tolerierten Maße, dass ein loses Aufschieben ohne Gratbildung garantiert ist. In einem automatischen Werkzeug wird der Ventilmantel 5 auf der Ventilhülse 6 in der gewünschten Position festgehalten. Anschließend wird der Ventilsitzkörper 15 in die innere Öffnung 11 der Ventilhülse 6 in stromabwärtiger Richtung eingeschoben bzw. aufgrund seiner Außenmaße eingepresst. In vorteilhafter Weise wird der Ventilsitzkörper 15 bis zur Anlage am Bodenabschnitt 13 der Ventilhülse 6 geschoben. Es ist jedoch auch denkbar, die Ventilhülse 6 ohne Bodenabschnitt 13 auszubilden und den Ventilsitzkörper 15 weiter stromaufwärts in der Ventilhülse 6 anzuordnen.According to the invention is used to assemble the Valve assembly first the valve jacket 5 on the Valve sleeve 6 pushed on. The valve sleeve 6 and the valve jacket 5 such tolerated dimensions that a loose sliding without burr formation is guaranteed. In one automatic tool, the valve jacket 5 on the Valve sleeve 6 held in the desired position. Then the valve seat body 15 into the inner Opening 11 of the valve sleeve 6 in the downstream direction inserted or pressed in due to its external dimensions. In Advantageously, the valve seat body 15 to Pushed against the bottom section 13 of the valve sleeve 6. It is also conceivable, the valve sleeve 6 without Form bottom portion 13 and the valve seat body 15 to be arranged further upstream in the valve sleeve 6.

Im axialen Erstreckungsbereich des Befestigungsbereichs 59 des Ventilmantels 5 ist in der inneren Öffnung 11 der Ventilhülse 6 z.B. ein Absatz 60 vorgesehen, der durch eine minimale Veränderung des Innendurchmessers entsteht. Durch das Einpressen des Ventilsitzkörpers 15 erfolgt eine Aufweitung zumindest in diesem Teilabschnitt der Ventilhülse 6. Der Ventilsitzkörper 15 erhält eine Endposition innerhalb der Ventilhülse 6, in der er axial überlappend mit dem Befestigungsbereich 59 des Ventilmantels 5 verbleibt. Allein durch das Einpressen des Ventilsitzkörpers 15 wird auf diese Art und Weise eine feste Verbindung von Ventilhülse 6 und Ventilmantel 5 erzielt. Durch das axiale Überlappen von Ventilsitzkörper 15 und Befestigungsbereich 59 des Ventilmantels 5 liegt eine dauerhafte radiale Pressung und eine ausreichende Spannung vor, die es erlaubt, auf einen zusätzlichen Fügeprozess, wie z.B. Schweißen oder Bördeln zu verzichten.In the axial extent of the fastening area 59 of the valve jacket 5 is in the inner opening 11 of the Valve sleeve 6 e.g. a paragraph 60 provided by a minimal change in inner diameter arises. By the valve seat body 15 is pressed in Widening at least in this section of the valve sleeve 6. The valve seat body 15 receives an end position within the valve sleeve 6, in which it axially overlaps with the Fastening area 59 of the valve jacket 5 remains. Alone by pressing the valve seat body 15 is on this Way a firm connection of valve sleeve 6 and Valve jacket 5 achieved. By axially overlapping Valve seat body 15 and fastening area 59 of the Valve jacket 5 is a permanent radial pressure and a sufficient tension that allows one to additional joining process, e.g. Welding or flanging too dispense.

Claims (6)

  1. Method for mounting a valve module of a fuel injection valve for fuel injection systems of internal combustion engines, the fuel injection valve comprising an electromagnetic activation element having a solenoid (1), having an internal pole (2) and having an external magnetic circuit component (5) and a movable valve closing element (19) which interacts with a valve seat (16) which is assigned to a valve seat body (15), as well as a thin-walled valve sleeve (6), the valve seat body (15) and the internal pole (2) being arranged in an internal opening (11) of the valve sleeve (6), and the solenoid (1) and the external magnetic circuit component (5) being arranged on the outer circumference of a valve sleeve (6), characterized in that
    a) the magnetic circuit component (5) is pushed onto the valve sleeve (6),
    b) the valve seat body (15) is then pressed into the internal opening (11) in the valve sleeve (6), as a result of which widening takes place at least in a part of the valve sleeve (6), and
    c) a fixed connection of the valve sleeve (6) and magnetic circuit component (5) is brought about solely by pressing in the valve seat body (15).
  2. Method according to Claim 1, characterized in that the valve sleeve (6) is formed with a cover part (12) and a bottom part (13) which extends largely perpendicularly with respect to the latter, and the valve seat body (15) is pushed as far as the position in which it bears against the bottom part (13).
  3. Method according to Claim 1 or 2, characterized in that the magnetic circuit component (5) is formed with a cover region (58) which fits around the valve sleeve (6) clearly spaced apart from it, and an attachment region (59) which is in contact with the valve sleeve (6), the cover region (58) and attachment region (59) being connected to one another by means of a radial region (32).
  4. Method according to Claim 3, characterized in that the valve sleeve (6) and magnetic circuit component (5) are permanently connected in the attachment region (59) of the magnetic circuit component (5).
  5. Method according to Claim 4, characterized in that a shoulder (60) is provided in the region of the axial extension region of the attachment region (59) in the internal opening (11) of the valve sleeve (6).
  6. Method according to one of Claims 3 to 5, characterized in that the valve seat body (15) is moved into an end position within the valve sleeve (6) which is such that in said position it retains an axial overlap with the attachment region (59) of the magnetic circuit component (5).
EP99955812A 1999-01-08 1999-09-25 Method for mounting a valve module of a fuel injector Expired - Lifetime EP1062422B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19900405A DE19900405A1 (en) 1999-01-08 1999-01-08 Method of assembling a valve assembly of a fuel injector
DE19900405 1999-01-08
PCT/DE1999/003097 WO2000040858A1 (en) 1999-01-08 1999-09-25 Method for mounting a valve module of a fuel injector

Publications (2)

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EP1062422A1 EP1062422A1 (en) 2000-12-27
EP1062422B1 true EP1062422B1 (en) 2004-03-24

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EP99955812A Expired - Lifetime EP1062422B1 (en) 1999-01-08 1999-09-25 Method for mounting a valve module of a fuel injector

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EP (1) EP1062422B1 (en)
JP (1) JP2002534639A (en)
KR (1) KR20010052202A (en)
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DE (2) DE19900405A1 (en)
RU (1) RU2237191C2 (en)
WO (1) WO2000040858A1 (en)

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DE10142974B4 (en) * 2001-09-01 2010-04-29 Robert Bosch Gmbh Fuel injector
DE102007008863A1 (en) * 2005-08-26 2008-08-28 Robert Bosch Gmbh Fuel injector
DE102005040363B4 (en) * 2005-08-26 2017-09-14 Robert Bosch Gmbh Fuel injector
DE102005040361A1 (en) 2005-08-26 2007-03-01 Robert Bosch Gmbh Metallic components for electromagnetically operated fuel injection valve, have surface-roughening structure that is provided by laser, where metal oxides such as chrome oxides are deposited in roughening structure
CN101975129B (en) * 2010-09-10 2012-05-02 冯政杰 Electronic electromagnetic petrol injection valve
EP2441540A1 (en) 2010-10-12 2012-04-18 Siemens VAI Metals Technologies GmbH Method and assembly for energy-efficient production of hot rolled steel strips
EP2441539A1 (en) 2010-10-12 2012-04-18 Siemens VAI Metals Technologies GmbH Energy and output-optimised method and assembly for producing hot rolled steel strips
JP5358621B2 (en) * 2011-06-20 2013-12-04 日立オートモティブシステムズ株式会社 Fuel injection device
DE102011089247A1 (en) 2011-12-20 2013-06-20 Robert Bosch Gmbh Fuel injector
US8978364B2 (en) * 2012-05-07 2015-03-17 Tenneco Automotive Operating Company Inc. Reagent injector
EP3009657B1 (en) * 2014-10-15 2019-03-13 Continental Automotive GmbH Housing assembly for a fuel injector, fuel injector and method for producing the housing assembly
CN106979110A (en) * 2017-05-04 2017-07-25 柳州源创电喷技术有限公司 Gasoline engine in-cylinder direct-jet fuel injector

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DE59908956D1 (en) 2004-04-29
US6543137B1 (en) 2003-04-08
DE19900405A1 (en) 2000-07-13
CN1116515C (en) 2003-07-30
JP2002534639A (en) 2002-10-15
KR20010052202A (en) 2001-06-25
RU2237191C2 (en) 2004-09-27
WO2000040858A1 (en) 2000-07-13
CN1292847A (en) 2001-04-25
EP1062422A1 (en) 2000-12-27

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