EP1706634B1 - Method for production of a fuel injection valve and fuel injection valve - Google Patents

Method for production of a fuel injection valve and fuel injection valve Download PDF

Info

Publication number
EP1706634B1
EP1706634B1 EP04801921A EP04801921A EP1706634B1 EP 1706634 B1 EP1706634 B1 EP 1706634B1 EP 04801921 A EP04801921 A EP 04801921A EP 04801921 A EP04801921 A EP 04801921A EP 1706634 B1 EP1706634 B1 EP 1706634B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel inlet
longitudinal axis
fuel
inlet stub
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 - Fee Related
Application number
EP04801921A
Other languages
German (de)
French (fr)
Other versions
EP1706634A1 (en
Inventor
Ferdinand Reiter
Martin Maier
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 EP1706634A1 publication Critical patent/EP1706634A1/en
Application granted granted Critical
Publication of EP1706634B1 publication Critical patent/EP1706634B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • 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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to a method for producing a fuel injection valve according to the preamble of claim 1 and of a fuel injection valve according to the preamble of claim 5.
  • FIG. 1 a known fuel injection valve is shown in the prior art, which has a classic top-feed structure, which is characterized in that all flow-leading components of the injection valve along a valve longitudinal axis extending, wherein the flow inlet is connected to a connecting piece of a fuel distributor and the flow outlet downstream of the sealing seat is directed into an intake pipe or directly into a combustion chamber of an internal combustion engine.
  • a fuel injection valve which is electromagnetically actuated in a conventional manner.
  • the injection valve has an inlet connection, which is arranged away from a valve longitudinal axis.
  • the injection valve also has a housing body, in which all relevant valve components are installed, so that fuel between the inlet nozzle and a fuel outlet can be supplied under pressure to a valve seat, with which a valve closing body cooperates.
  • the housing body becomes Covered on the inflow side with a cover-like closure body, which also has an outlet connection for excess fuel and electrical plug contacts which is aligned with the valve longitudinal axis in addition to the inlet connection.
  • the inventive method for producing a fuel injection valve having the characterizing features of claim 1 has the advantage that in a particularly simple and cost-effective manner, fuel injectors with low heights for cramped conditions, e.g. can be produced in motorcycles.
  • the fuel injection valve according to the invention with the characterizing features of claim 4 already completely with respect to the stroke of the axially movable valve member and the dynamic and static flow rate finished in the actual functional part of the injection valve is present, so that subsequently easily mounting an even of the Escape the valve longitudinal axis deviating, angled Brennstoffeinlassstutzens in a connection part of the injector to the functional part can be done by firmly connecting.
  • fuel injection valves can be produced which have fuel inlet stubs whose angle to the valve longitudinal axis is variable between 0 ° and 90 °.
  • Such a trained unilaterally angled inlet nozzle also offers very easy the possibility of accurate positioning of the injector or a simplified Vercardfix ist.
  • the fuel inlet port is provided with a sawtooth-like profile at its upstream end so as to allow easy connection to a fuel supply hose pushed onto the sawtooth-like profile and a hose clamp. In this way, further sealing measures, such as O-rings omitted.
  • FIG. 1 a fuel injection valve according to the prior art with a running in the direction of the valve longitudinal axis top feed supply with fuel
  • FIG. 2 a Brennscherinlassstutzen according to the prior art with hose connection option and also to the valve longitudinal axis aligned fuel supply
  • FIG. 3 a fuel inlet with hose connection option and about 90 ° to the valve longitudinal axis angled fuel supply.
  • FIG. 3 Before using the FIG. 3 the method steps of the method for producing a fuel injection valve according to the invention will be described, is based on FIG. 1 a fuel injection valve of the prior art, which is designed as a so-called top-feed injection valve, will be explained in more detail in its basic structure.
  • eletromagnetromagnetisch operated valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignited Brennkrafonaschinen has one of a magnetic coil 1 surrounded, serving as an inner pole and partially as a fuel flow largely tubular core 2.
  • the magnetic coil 1 is of an outer, sleeve-shaped and stepped running, z.
  • the magnetic coil 1, the core 2 and the valve shell 5 together form an electrically excitable actuator.
  • solenoid coil 1 While embedded in a bobbin 3 solenoid coil 1 surrounds a valve sleeve 6 from the outside, the core 2 in an inner, concentric with a valve longitudinal axis 10 extending opening 11 of the valve sleeve 6 is introduced.
  • the e.g. Ferritic valve sleeve 6 is elongated and thin-walled.
  • the opening 11 is used u.a. as a guide opening for a valve needle 14 which is axially movable along the valve longitudinal axis 10.
  • the valve sleeve 6 extends in the axial direction, e.g. over approximately half of the total axial extent of the fuel injection valve.
  • valve seat body 15 is further arranged in the opening 11, which is fastened to the valve sleeve 6, for example by means of a weld 8.
  • the valve seat body 15 has a fixed valve seat surface 16 as a valve seat.
  • the valve needle 14 is formed for example by a tubular anchor portion 17, a likewise tubular needle portion 18 and a spherical valve closing body 19, wherein the valve closing body 19 is connected for example by means of a weld fixed to the needle portion 18.
  • a cup-shaped spray perforated disk 21 is arranged, whose bent and circumferentially encircling retaining edge 20 is directed against the flow direction upwards.
  • valve seat body 15 and spray disk 21 The solid connection of the valve seat body 15 and spray disk 21 is z. B. realized by a circumferential tight weld.
  • z. B. realized by a circumferential tight weld.
  • one or more transverse openings 22 are provided, so that the armature portion 17 in an inner longitudinal bore 23 by flowing fuel to the outside and can flow on the valve closing body 19, for example, at flats 24 to the valve seat surface 16.
  • the actuation of the injection valve takes place in a known manner electromagnetically.
  • the electromagnetic circuit with the solenoid coil 1, the inner core 2, the outer valve shell 5 and the anchor portion 17 of the Anchor portion 17 is aligned with the valve closing body 19 facing away from the end of the core 2.
  • the spherical valve closing body 19 cooperates with the valve seat surface 16 of the valve seat body 15, which tapers in the direction of the flow of the truncated cone and which is formed in the axial direction downstream of a guide opening in the valve seat body 15.
  • the spray perforated disc 21 has at least one, for example, four ejection openings 27 formed by erosion, laser drilling or punching.
  • the insertion depth of the core 2 in the injection valve is decisive for the stroke of the valve needle 14.
  • the one end position of the valve needle 14 is fixed in the non-energized magnetic coil 1 by the contact of the valve closing body 19 on the valve seat surface 16 of the valve seat body 15, while the other End position of the valve needle 14 results in energized solenoid coil 1 by the system of the anchor portion 17 at the downstream end of the core.
  • the stroke is adjusted by an axial displacement of the core 2, for example, produced by a machining process such as turning, which is subsequently connected firmly to the valve sleeve 6 according to the desired position.
  • an adjustment in the form of an adjusting sleeve 29 is inserted.
  • the adjusting sleeve 29 is used to adjust the spring preload applied to the adjusting sleeve 29 return spring 25, which in turn is supported with its opposite side to the valve needle 14, wherein also setting the dynamic Abspritzmenge with the Adjusting sleeve 29 takes place.
  • a fuel filter 32 is disposed above the adjusting sleeve 29 in the valve sleeve 6.
  • the injector described so far is characterized by its particularly compact design. These components form a preassembled independent assembly, which is called function part 30 below.
  • the functional part 30 thus essentially comprises the electromagnetic circuit 1, 2, 5 as an actuator and a sealing valve (valve closing body 19, valve seat body 15) with a subsequent jet treatment element (spray perforated disk 21) and as the base body, the valve sleeve. 6
  • connection part 40 is characterized above all by the fact that it comprises the electrical and the hydraulic connection of the fuel injection valve. With the method steps according to the invention, the compactness of the entire fuel injection valve should be further increased, in particular by a targeted shaping of the connection part 40, in that the height of the fuel injection valve can be reduced.
  • the partially executed as a plastic part connector 40 has a metal fuel inlet 41 and this fuel inlet 41 stabilizing, protective and surrounding tubular body 42 made of plastic.
  • a concentric to the valve longitudinal axis 10 extending flow bore 43 of a pipe 44 of the Brennscherinlassstutzens 41 serves as a fuel inlet and is flowed through by the fuel from the inflow end of the fuel injection valve in the axial direction.
  • a hydraulic connection of connecting part 40 and functional part 30 is achieved in the fully assembled fuel injection valve in that the flow holes 43 and 28 of both modules are brought to each other so that an unimpeded flow through the fuel is ensured.
  • a lower end 47 of the tube 44 protrudes into the opening 11 in order to increase the connection stability the valve sleeve 6 into it.
  • the main body 42 made of plastic can be sprayed onto the functional part 30 so that the plastic immediately surrounds parts of the valve sleeve 6 and of the valve jacket 5.
  • a secure seal between the functional part 30 and the main body 42 of the connecting part 40 is achieved, for example, via a labyrinth seal 46 on the circumference of the valve jacket 5.
  • To the base body 42 includes a mitangespritzter electrical connector 56. At its opposite end of the connector 56, the contact elements with the solenoid coil 1 are electrically connected.
  • connection parts 40 with fuel inlet 41 are partially shown. It is in FIG. 2 again indicated that it is necessary in conventional known fuel injectors to arrange the fuel inlet port 41 parallel to the axis and in alignment with the valve longitudinal axis 10 in order to have access at any time for necessary adjustment measures within the valve access of corresponding adjustment tools.
  • the inventive method for producing a fuel injection valve is characterized in that it is possible to provide a fuel inlet 41 at the fuel injection valve, which extends from an upstream inlet opening 60 at an angle ⁇ to the valve longitudinal axis 10 which is greater than 0 ° and less than or equal to 90th ° is.
  • a fuel inlet 41 at the fuel injection valve, which extends from an upstream inlet opening 60 at an angle ⁇ to the valve longitudinal axis 10 which is greater than 0 ° and less than or equal to 90th ° is.
  • the fuel inlet port 41 extends at an angle ⁇ of 90 ° to the valve longitudinal axis 10 in a first angled portion 62.
  • the inlet opening 60 spans a plane which runs parallel to the valve longitudinal axis 10.
  • the fuel inlet stub 41 ends with a second axis-parallel section 63 on the valve longitudinal axis 10.
  • the fuel inlet stub 41 extends in its section 63 in alignment and thus coaxially with the valve
  • the production of the fuel injection valve is carried out in such a way that first the functional part 30 of the valve is produced, which includes the actuator 1, 2, 5 and the sealing valve 15, 19 comprises.
  • the valve sleeve 6 is provided.
  • This manufacturing process is followed by a setting process in which the setting of the stroke of the axially movable valve member (valve needle 14, valve closing member 19) as well as the dynamic and static flow rate are already fully carried out.
  • the fuel inlet stub 41 is firmly connected to the functional part 30 such that the fuel inlet stub 41 ends on the valve longitudinal axis 10.
  • the fuel inlet nozzle 41 is inserted with its end 47 of the axially parallel portion 63, for example, in the opening 11 of the valve sleeve 6 and subsequently attached to the valve sleeve 6 of the functional part 30 by welding, in particular laser welding. In addition to welding, other joining methods such as soldering, gluing or locking can be used.
  • the fuel inlet port 41 is subsequently encapsulated, for example, with the tubular body 42 made of plastic.
  • a mitangespritzter connector 56 may belong to the main body 42.
  • the fuel inlet port 41 is provided with a sawtooth-like profile 61 at its upstream end in the region of the angled portion 62, so that a simple connection with a not shown fuel-feeding hose, which is pushed onto the sawtooth-like profile, and a hose clamp is enabled. In this way, further sealing measures, such as O-rings omitted.

Landscapes

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

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Verfahren zur Herstellung eines Brennstoffeinspritzventils nach der Gattung des Anspruchs 1 sowie von einem Brennstoffeinspritzventil nach der Gattung des Anspruchs 5.The invention relates to a method for producing a fuel injection valve according to the preamble of claim 1 and of a fuel injection valve according to the preamble of claim 5.

In der Figur 1 ist ein bekanntes Brennstoffeinspritzventil aus dem Stand der Technik dargestellt, das einen klassischen Top-Feed-Aufbau besitzt, der sich dadurch auszeichnet, dass sich alle strömungsführenden Komponenten des Einspritzventils entlang einer Ventillängsachse fluchtend erstrecken, wobei der Strömungseinlass mit einem Anschlussstutzen eines Brennstoffverteilers verbunden wird und der Strömungsauslass stromabwärts des Dichtsitzes in ein Ansaugrohr oder unmittelbar in einen Brennraum einer Brennkraftmaschine gerichtet ist.In the FIG. 1 a known fuel injection valve is shown in the prior art, which has a classic top-feed structure, which is characterized in that all flow-leading components of the injection valve along a valve longitudinal axis extending, wherein the flow inlet is connected to a connecting piece of a fuel distributor and the flow outlet downstream of the sealing seat is directed into an intake pipe or directly into a combustion chamber of an internal combustion engine.

Aus der DE 21 53 286 A1 ist bereits ein Brennstoffeinspritzventil bekannt, das in herkömmlicher Weise elekfromagnetisch betätigbar ist. Das Einspritzventil weist einen Einlassstutzen auf, der abseits einer Ventillängsachse angeordnet ist. Das Einspritzventil besitzt zudem einen Gehäusekörper, in dem alle relevanten Ventilbauteile verbaut sind, so dass Brennstoff zwischen dem Einlassstutzen und einem Brennstoffauslass unter Druck einem Ventilsitz zugeführt werden kann, mit dem ein Ventilschließkörper zusammenwirkt. Der Gehäusekörper wird zuströmseitig mit einem deckelartigen Verschlusskörper abgedeckt, der neben dem Einlassstutzen auch noch einen mit der Ventillängsachse fluchtenden Auslassstutzen für überschüssigen Brennstoff und elektrische Steckkontakte aufweist. Durch einen den Verschlusskörper umgreifenden Bördelrand des Gehäusekörpers wird der Verschlusskörper fest am Gehäusekörper gehalten. Im Verbindungsbereich zwischen dem Verschlusskörper und dem Gehäusekörper ist außerdem ein Dichtring vorgesehen.
Aus der EP 1347170 ist ein anderes Brennstoffeinspritzventil bekannt.From the DE 21 53 286 A1 already a fuel injection valve is known, which is electromagnetically actuated in a conventional manner. The injection valve has an inlet connection, which is arranged away from a valve longitudinal axis. The injection valve also has a housing body, in which all relevant valve components are installed, so that fuel between the inlet nozzle and a fuel outlet can be supplied under pressure to a valve seat, with which a valve closing body cooperates. The housing body becomes Covered on the inflow side with a cover-like closure body, which also has an outlet connection for excess fuel and electrical plug contacts which is aligned with the valve longitudinal axis in addition to the inlet connection. By a closure body surrounding the closure bead of the housing body of the closure body is firmly held on the housing body. In the connecting region between the closure body and the housing body, a sealing ring is also provided.
From the EP 1347170 another fuel injector is known.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Verfahren zur Herstellung eines Brennstoffeinspritzventils mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass auf besonders einfache und kostengünstige Art und Weise Brennstoffeinspritzventile mit niedrigen Bauhöhen für beengte Verhältnisse, z.B. bei Motorrädern herstellbar sind. Von Vorteil ist insbesondere, dass das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Anspruchs 4 bereits vollständig bezüglich des Hubs des axial beweglichen Ventilteils sowie der dynamischen und statischen Strömungsmenge fertig eingestellt im eigentlichen Funktionsteil des Einspritzventils vorliegt, so dass nachfolgend problemlos eine Montage eines sogar von der Flucht der Ventillängsachse abweichenden, abgewinkelten Brennstoffeinlassstutzens in einem Anschlussteil des Einspritzventils an dem Funktionsteil durch festes Verbinden erfolgen kann.The inventive method for producing a fuel injection valve having the characterizing features of claim 1 has the advantage that in a particularly simple and cost-effective manner, fuel injectors with low heights for cramped conditions, e.g. can be produced in motorcycles. Of particular advantage is that the fuel injection valve according to the invention with the characterizing features of claim 4 already completely with respect to the stroke of the axially movable valve member and the dynamic and static flow rate finished in the actual functional part of the injection valve is present, so that subsequently easily mounting an even of the Escape the valve longitudinal axis deviating, angled Brennstoffeinlassstutzens in a connection part of the injector to the functional part can be done by firmly connecting.

In besonders vorteilhafter Weise können Brennstoffeinspritzventile hergestellt werden, die Brennstoffeinlassstutzen aufweisen, deren Winkel zur Ventillängsachse variabel zwischen 0° und 90° beträgt.In a particularly advantageous manner, fuel injection valves can be produced which have fuel inlet stubs whose angle to the valve longitudinal axis is variable between 0 ° and 90 °.

Ein derartig ausgebildeter einseitig abgewinkelter Einlassstutzen bietet zudem sehr einfach die Möglichkeit einer genauen Positionierung des Einspritzventils bzw. eine vereinfachte Verdrehfixierung.Such a trained unilaterally angled inlet nozzle also offers very easy the possibility of accurate positioning of the injector or a simplified Verdrehfixierung.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Verfahrens bzw. des im Anspruch 4 angegebenen Brennstoffeinspritzventils möglich.The measures listed in the dependent claims advantageous refinements and improvements of claim 1 Method or specified in claim 4 fuel injector possible.

Idealerweise ist der Brennstoffeinlassstutzen mit einem sägezahnähnlichen Profil an seinem stromaufwärtigen Ende versehen, so dass eine einfache Verbindung mit einem Brennstoff zuführenden Schlauch, der auf das sägezahnähnliche Profil aufgeschoben wird, und einer Schlauchschelle ermöglicht ist. Auf diese Weise können weitere Abdichtungsmaßnahmen, wie O-Ringe, entfallen.Ideally, the fuel inlet port is provided with a sawtooth-like profile at its upstream end so as to allow easy connection to a fuel supply hose pushed onto the sawtooth-like profile and a hose clamp. In this way, further sealing measures, such as O-rings omitted.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 ein Brennstoffeinspritzventil gemäß dem Stand der Technik mit einer fluchtend zur Ventillängsachse verlaufenden Top-Feed-Versorgung mit Brennstoff, Figur 2 einen Brennstoffeinlassstutzen gemäß dem Stand der Technik mit Schlauchanschlussmöglichkeit und ebenfalls zur Ventillängsachse fluchtender Brennstoffzuführung und Figur 3 einen Brennstoffeinlassstutzen mit Schlauchanschlussmöglichkeit und um ca. 90° zur Ventillängsachse abgewinkelter Brennstoffzuführung.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. Show it FIG. 1 a fuel injection valve according to the prior art with a running in the direction of the valve longitudinal axis top feed supply with fuel, FIG. 2 a Brennstoffeinlassstutzen according to the prior art with hose connection option and also to the valve longitudinal axis aligned fuel supply and FIG. 3 a fuel inlet with hose connection option and about 90 ° to the valve longitudinal axis angled fuel supply.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Bevor anhand der Figur 3 die erfindungsgemäßen Verfahrensschritte des Verfahrens zur Herstellung eines Brennstoffeinspritzventils beschrieben werden, soll anhand von Figur 1 ein Brennstoffeinspritzventil des Standes der Technik, das als sogenanntes Top-Feed-Einspritzventil ausgebildet ist, in seinem grundsätzlichen Aufbau näher erläutert werden.Before using the FIG. 3 the method steps of the method for producing a fuel injection valve according to the invention will be described, is based on FIG. 1 a fuel injection valve of the prior art, which is designed as a so-called top-feed injection valve, will be explained in more detail in its basic structure.

Das in der Figur 1 beispielhaft dargestellte, elelctromagnetisch betätigbare Ventil in der Form eines Einspritzventils für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkrafonaschinen 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.That in the FIG. 1 exemplified, eletromagnetromagnetisch operated valve in the form of an injection valve for fuel injection systems of mixture-compressing, spark-ignited Brennkrafonaschinen has one of a magnetic coil 1 surrounded, serving as an inner pole and partially as a fuel flow largely tubular core 2. The magnetic coil 1 is of an outer, sleeve-shaped and stepped running, z. B. ferromagnetic valve jacket 5, which is an outer pole serving as outer magnetic circuit component, completely surrounded in the circumferential direction. The magnetic coil 1, the core 2 and the valve shell 5 together form an electrically 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. Die Öffnung 11 dient u.a. als Führungsöffnung für eine entlang der Ventillängsachse 10 axial bewegliche Ventilnadel 14. Die Ventilhülse 6 erstreckt sich in axialer Richtung z.B. über ca. die Hälfte der axialen Gesamterstreckung des Brennstoffeinspritzventils.While embedded in a bobbin 3 solenoid coil 1 surrounds a valve sleeve 6 from the outside, the core 2 in an inner, concentric with a valve longitudinal axis 10 extending opening 11 of the valve sleeve 6 is introduced. The e.g. Ferritic valve sleeve 6 is elongated and thin-walled. The opening 11 is used u.a. as a guide opening for a valve needle 14 which is axially movable along the valve longitudinal axis 10. The valve sleeve 6 extends in the axial direction, e.g. over approximately half of the total axial extent of the fuel injection valve.

Neben dem Kern 2 und der Ventilnadel 14 ist in der Öffnung 11 des weiteren ein Ventilsitzkörper 15 angeordnet, der an der Ventilhülse 6 z.B. mittels einer Schweißnaht 8 befestigt ist. Der Ventilsitzkörper 15 weist eine feste Ventilsitzfläche 16 als Ventilsitz auf. 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 eine z.B. topfförmige Spritzlochscheibe 21 angeordnet, deren umgebogener und umfangsmäßig umlaufender Halterand 20 entgegen der Strömungsrichtung nach oben gerichtet ist. Die feste Verbindung von Ventilsitzkörper 15 und Spritzlochscheibe 21 ist z. B. durch eine umlaufende dichte Schweißnaht realisiert. 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, a valve seat body 15 is further arranged in the opening 11, which is fastened to the valve sleeve 6, for example by means of a weld 8. The valve seat body 15 has a fixed valve seat surface 16 as a valve seat. The valve needle 14 is formed for example by a tubular anchor portion 17, a likewise tubular needle portion 18 and a spherical valve closing body 19, wherein the valve closing body 19 is connected for example by means of a weld fixed to the needle portion 18. At the downstream end side of the valve seat body 15, for example, a cup-shaped spray perforated disk 21 is arranged, whose bent and circumferentially encircling retaining edge 20 is directed against the flow direction upwards. The solid connection of the valve seat body 15 and spray disk 21 is z. B. realized by a circumferential tight weld. In the needle portion 18 of the valve needle 14, one or more transverse openings 22 are provided, so that the armature portion 17 in an inner longitudinal bore 23 by flowing fuel to the outside and can flow on the valve closing body 19, for example, at flats 24 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 actuation of the injection valve takes place in a known manner electromagnetically. For axial movement of the valve needle 14 and thus to open against the spring force of an acting on the valve needle 14 return spring 25 and closing the injector, the electromagnetic circuit with the solenoid coil 1, the inner core 2, the outer valve shell 5 and the anchor portion 17 of the Anchor portion 17 is aligned with the valve closing body 19 facing away from the end of the core 2.

Der kugelförmige Ventilschließkörper 19 wirkt mit der sich in Strömungsrichtung kegelstumpffärmig 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 cooperates with the valve seat surface 16 of the valve seat body 15, which tapers in the direction of the flow of the truncated cone and which is formed in the axial direction downstream of a guide opening in the valve seat body 15. The spray perforated disc 21 has at least one, for example, four ejection openings 27 formed by erosion, laser drilling or punching.

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.Among other things, the insertion depth of the core 2 in the injection valve is decisive for the stroke of the valve needle 14. The one end position of the valve needle 14 is fixed in the non-energized magnetic coil 1 by the contact of the valve closing body 19 on the valve seat surface 16 of the valve seat body 15, while the other End position of the valve needle 14 results in energized solenoid coil 1 by the system of the anchor portion 17 at the downstream end of the core. The stroke is adjusted by an axial displacement of the core 2, for example, produced by a machining process such as turning, which is subsequently connected firmly to the valve sleeve 6 according to the desired position.

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 Einstellhülse 29 eingeschoben. Die Einstellhülse 29 dient zur Einstellung der Federvorspannung der an der Einstellhülse 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 Einstellhülse 29 erfolgt. Ein Brennstofffilter 32 ist oberhalb der Einstellhülse 29 in der Ventilhülse 6 angeordnet.In a concentric with the valve longitudinal axis 10 extending flow bore 28 of the core 2, which serves to supply the fuel in the direction of the valve seat surface 16, except for the return spring 25, an adjustment in the form of an adjusting sleeve 29 is inserted. The adjusting sleeve 29 is used to adjust the spring preload applied to the adjusting sleeve 29 return spring 25, which in turn is supported with its opposite side to the valve needle 14, wherein also setting the dynamic Abspritzmenge with the Adjusting sleeve 29 takes place. A fuel filter 32 is disposed above the adjusting sleeve 29 in the valve sleeve 6.

Das bis hierher beschriebene Einspritzventil zeichnet sich durch seinen besonders kompakten Aufbau aus. 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 als Aktuator und ein Dichtventil (Ventilschließkörper 19, Ventilsitzkörper 15) mit einem nachfolgenden Strahlaufbereitungselement (Spritzlochscheibe 21) sowie als Grundkörper die Ventilhülse 6.The injector described so far is characterized by its particularly compact design. These components form a preassembled independent assembly, which is called function part 30 below. The functional part 30 thus essentially comprises the electromagnetic circuit 1, 2, 5 as an actuator and a sealing valve (valve closing body 19, valve seat body 15) with a subsequent jet treatment element (spray perforated disk 21) and as the base body, the valve sleeve. 6

Unabhängig vom Funktionsteil 30 wird eine zweite Baugruppe erzeugt, 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. Mit den erfindungsgemäßen Verfahrensschritten soll insbesondere durch ein gezieltes Ausformen des Anschlussteils 40 die Kompaktheit des gesamten Brennstoffeinspritzventils weiter erhöht werden, indem die Bauhöhe des Brennstoffeinspritzventils reduziert werden kann.Regardless of the functional part 30, a second module is produced, which is referred to below as a connector 40. The connection part 40 is characterized above all by the fact that it comprises the electrical and the hydraulic connection of the fuel injection valve. With the method steps according to the invention, the compactness of the entire fuel injection valve should be further increased, in particular by a targeted shaping of the connection part 40, in that the height of the fuel injection valve can be reduced.

Das teilweise als Kunststoffteil ausgeführte Anschlussteil 40 besitzt einen metallenen Brennstoffeinlassstutzen 41 und einen diesen Brennstoffeinlassstutzen 41 stabilisierenden, schützenden und umgebenden rohrförmigen Grundkörper 42 aus Kunststoff. Eine konzentrisch zur Ventillängsachse 10 verlaufende Strömungsbohrung 43 eines Rohres 44 des Brennstoffeinlassstutzens 41 dient als Brennstoffeinlass und wird von dem zuströmseitigen Ende des Brennstoffeinspritzventils aus in axialer Richtung vom Brennstoff durchströmt.The partially executed as a plastic part connector 40 has a metal fuel inlet 41 and this fuel inlet 41 stabilizing, protective and surrounding tubular body 42 made of plastic. A concentric to the valve longitudinal axis 10 extending flow bore 43 of a pipe 44 of the Brennstoffeinlassstutzens 41 serves as a fuel inlet and is flowed through by the fuel from the inflow end of the fuel injection valve in the axial direction.

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. Bei der Montage des Anschlussteils 40 an dem Funktionsteil 30 ragt ein unteres Ende 47 des Rohres 44 zur Erhöhung der Verbindungsstabilität in die Öffnung 11 der Ventilhülse 6 hinein. Der Grundkörper 42 aus Kunststoff kann auf das Funktionsteil 30 aufgespritzt werden, so dass der Kunststoff unmittelbar Teile der Ventilhülse 6 sowie des Ventilmantels 5 umgibt. Eine sichere Abdichtung zwischen dem Funktionsteil 30 und dem Grundkörper 42 des Anschlussteils 40 wird beispielsweise über eine Labyrinthdichtung 46 am Umfang des Ventilmantels 5 erzielt.A hydraulic connection of connecting part 40 and functional part 30 is achieved in the fully assembled fuel injection valve in that the flow holes 43 and 28 of both modules are brought to each other so that an unimpeded flow through the fuel is ensured. When mounting the connecting part 40 to the functional part 30, a lower end 47 of the tube 44 protrudes into the opening 11 in order to increase the connection stability the valve sleeve 6 into it. The main body 42 made of plastic can be sprayed onto the functional part 30 so that the plastic immediately surrounds parts of the valve sleeve 6 and of the valve jacket 5. A secure seal between the functional part 30 and the main body 42 of the connecting part 40 is achieved, for example, via a labyrinth seal 46 on the circumference of the valve jacket 5.

Zu dem Grundkörper 42 gehört auch ein mitangespritzter elektrischer Anschlussstecker 56. An ihrem dem Anschlussstecker 56 gegenüberliegenden Ende sind die Kontaktelemente mit der Magnetspule 1 elektrisch verbunden.To the base body 42 includes a mitangespritzter electrical connector 56. At its opposite end of the connector 56, the contact elements with the solenoid coil 1 are electrically connected.

In den Figuren 2 und 3 sind zwei Anschlussteile 40 mit Brennstoffeinlassstutzen 41 teilweise dargestellt. Dabei ist in Figur 2 nochmals angedeutet, dass es bei herkömmlichen bekannten Brennstoffeinspritzventilen notwendig ist, den Brennstoffeinlassstutzen 41 achsparallel und fluchtend zur Ventillängsachse 10 anzuordnen, um jederzeit für erforderliche Einstellmaßnahmen innerhalb des Ventils einen Zugang von entsprechenden Einstellwerkzeugen zu haben.In the FIGS. 2 and 3 two connection parts 40 with fuel inlet 41 are partially shown. It is in FIG. 2 again indicated that it is necessary in conventional known fuel injectors to arrange the fuel inlet port 41 parallel to the axis and in alignment with the valve longitudinal axis 10 in order to have access at any time for necessary adjustment measures within the valve access of corresponding adjustment tools.

Das erfindungsgemäße Verfahren zur Herstellung eines Brennstoffeinspritzventils zeichnet sich dadurch aus, dass es möglich ist, einen Brennstoffeinlassstutzen 41 am Brennstoffeinspritzventil vorzusehen, der beginnend von einer stromaufwärtigen Eintrittsöffnung 60 unter einem Winkel α zur Ventillängsachse 10 verläuft, der größer als 0° und kleiner/gleich 90° ist. In der Figur 3 ist ein Ausführungsbeispiel gezeigt, bei dem der Brennstoffeinlassstutzen 41 unter einem Winkel α von 90° zur Ventillängsachse 10 in einem ersten abgewinkelten Abschnitt 62 verläuft. In diesem Fall spannt also die Eintrittsöffnung 60 eine Ebene auf, die parallel zur Ventillängsachse 10 verläuft. Letztlich endet der Brennstoffeinlassstutzen 41 mit einem zweiten achsparallelen Abschnitt 63 auf der Ventillängsachse 10. Im idealen Fall verläuft der Brennstoffeinlassstutzen 41 in seinem Abschnitt 63 fluchtend und somit koaxial zur Ventillängsachse 10.The inventive method for producing a fuel injection valve is characterized in that it is possible to provide a fuel inlet 41 at the fuel injection valve, which extends from an upstream inlet opening 60 at an angle α to the valve longitudinal axis 10 which is greater than 0 ° and less than or equal to 90th ° is. In the FIG. 3 an embodiment is shown, in which the fuel inlet port 41 extends at an angle α of 90 ° to the valve longitudinal axis 10 in a first angled portion 62. In this case, therefore, the inlet opening 60 spans a plane which runs parallel to the valve longitudinal axis 10. Finally, the fuel inlet stub 41 ends with a second axis-parallel section 63 on the valve longitudinal axis 10. In the ideal case, the fuel inlet stub 41 extends in its section 63 in alignment and thus coaxially with the valve longitudinal axis 10.

Die Herstellung des Brennstoffeinspritzventils erfolgt in der Weise, dass zuerst das Funktionsteil 30 des Ventils hergestellt wird, das u.a. den Aktuator 1, 2, 5 und das Dichtventil 15, 19 umfasst. Als Grundkörper ist z.B. die Ventilhülse 6 vorgesehen. An diesen Herstellungsprozess schließt sich ein Einstellprozess an, in dem bereits vollständig die Einstellung des Hubs des axial beweglichen Ventilteils (Ventilnadel 14, Ventilschließkörper 19) sowie der dynamischen und statischen Strömungsmenge vorgenommen wird. Nachfolgend wird der Brennstoffeinlassstutzen 41 so mit dem Funktionsteil 30 fest verbunden, dass der Brennstoffeinlassstutzen 41 auf der Ventillängsachse 10 endet. Dabei wird der Brennstoffeinlassstutzen 41 mit seinem Ende 47 des achsparallelen Abschnitts 63 beispielsweise in die Öffnung 11 der Ventilhülse 6 eingeschoben und nachfolgend an der Ventilhülse 6 des Funktionsteils 30 mittels Schweißen, insbesondere Laserschweißen befestigt. Neben dem Schweißen können auch andere Fügeverfahren wie Löten, Kleben oder Verrasten zum Einsatz kommen.The production of the fuel injection valve is carried out in such a way that first the functional part 30 of the valve is produced, which includes the actuator 1, 2, 5 and the sealing valve 15, 19 comprises. As a basic body, for example, the valve sleeve 6 is provided. This manufacturing process is followed by a setting process in which the setting of the stroke of the axially movable valve member (valve needle 14, valve closing member 19) as well as the dynamic and static flow rate are already fully carried out. Subsequently, the fuel inlet stub 41 is firmly connected to the functional part 30 such that the fuel inlet stub 41 ends on the valve longitudinal axis 10. In this case, the fuel inlet nozzle 41 is inserted with its end 47 of the axially parallel portion 63, for example, in the opening 11 of the valve sleeve 6 and subsequently attached to the valve sleeve 6 of the functional part 30 by welding, in particular laser welding. In addition to welding, other joining methods such as soldering, gluing or locking can be used.

Um den abgewinkelten metallenen Brennstoffeinlassstutzen 41, der z.B. ein dünnwandiges Rohr 44 darstellt, zu stabilisieren und zu schützen, wird der Brennstoffeinlassstutzen 41 nachfolgend beispielsweise mit dem rohrförmigen Grundkörper 42 aus Kunststoff umspritzt. Dabei kann zu dem Grundkörper 42 ein mitangespritzter Anschlussstecker 56 gehören. Eine ausreichende Stabilität und ein guter Schutz des Brennstoffeinlassstutzens 41 sind bereits dann gegeben, wenn der Grundkörper 42 nur weitgehend den achsparallel verlaufenden Abschnitt 63 des Brennstoffeinslassstutzens 41 umgibt, während der abgewinkelte Abschnitt 62 des Rohrs 44 in seinem gewünschten Winkel α freiliegt und also nicht von Kunststoff umhüllt ist.To form the angled metal fuel inlet stub 41, e.g. is a thin-walled tube 44 to stabilize and protect, the fuel inlet port 41 is subsequently encapsulated, for example, with the tubular body 42 made of plastic. In this case, a mitangespritzter connector 56 may belong to the main body 42. Sufficient stability and good protection of the Brennstoffeinlassstutzens 41 are already given when the body 42 only largely surrounds the axially parallel portion 63 of the Kraftstoffeinslassstutzens 41, while the angled portion 62 of the tube 44 is exposed in its desired angle α and therefore not of plastic is wrapped.

Idealerweise ist der Brennstoffeinlassstutzen 41 mit einem sägezahnähnlichen Profil 61 an seinem stromaufwärtigen Ende im Bereich des abgewinkelten Abschnitts 62 versehen, so dass eine einfache Verbindung mit einem nicht dargestellten Brennstoff zuführenden Schlauch, der auf das sägezahnähnliche Profil aufgeschoben wird, und einer Schlauchschelle ermöglicht ist. Auf diese Weise können weitere Abdichtungsmaßnahmen, wie O-Ringe, entfallen.Ideally, the fuel inlet port 41 is provided with a sawtooth-like profile 61 at its upstream end in the region of the angled portion 62, so that a simple connection with a not shown fuel-feeding hose, which is pushed onto the sawtooth-like profile, and a hose clamp is enabled. In this way, further sealing measures, such as O-rings omitted.

Claims (7)

  1. Method for producing a fuel injection valve which has a valve longitudinal axis (10), a fuel inlet stub (41), a valve closing body (19) which can be moved axially along the valve longitudinal axis (10) and which interacts with a valve seat (16) which is provided on a valve seat body (15), and at least one ejection opening (27) downstream of the valve seat (16), wherein
    - a functional part (30) of the valve is produced, which functional part (30) comprises an actuator (1, 2, 5) and a sealing valve (15, 19),
    - said functional part (30) is set with regard to stroke and flow quantities,
    - separately to this, a fuel inlet stub (41) is provided which, starting from an inlet opening (60), extends at an angle (α) with respect to the valve longitudinal axis (10), which angle (α) is greater than 0° and less than or equal to 90°, and
    - the fuel inlet stub (41) is connected fixedly to the functional part (30) in such a way that the fuel inlet stub (41) ends on the valve longitudinal axis (10),
    characterized
    in that the fuel inlet stub (41) is provided as a thin-walled metallic pipe (44), subsequently the fuel inlet stub (41) is connected fixedly to the functional part (30), and finally, after it has been fastened, the fuel inlet stub (41) is encapsulated at least partially with a basic body (42) made from plastic.
  2. Method according to Claim 1, characterized in that the fuel inlet stub (41) is fastened to a valve sleeve (6) of the functional part (30).
  3. Method according to Claim 2, characterized in that the fuel inlet stub (41) is fastened by means of welding, in particular laser welding.
  4. Fuel injection valve for fuel injection systems of internal combustion engines, having a valve longitudinal axis (10), having a fuel inlet stub (41), having a valve closing body (19) which can be moved along the valve longitudinal axis (10) and which interacts with a valve seat (16) which is provided on a valve seat body (15), and having at least one ejection opening (27) downstream of the valve seat (16), wherein the fuel inlet stub (41), starting from an inlet opening (60), extends at an angle (α) with respect to the valve longitudinal axis (10), which angle (α) is greater than 0° and is less than or equal to 90° and ultimately ends on the valve longitudinal axis (10),
    characterized
    in that the fuel inlet stub (41) is formed by a thin-walled metallic pipe (44) which is embedded at least partially into a basic body (42) made from plastic.
  5. Fuel injection valve according to Claim 4,
    characterized in that the inlet opening (60) defines a plane which extends parallel to the valve longitudinal axis (10).
  6. Fuel injection valve according to Claim 4,
    characterized in that the basic body (42) only largely surrounds a section (63) of the fuel inlet stub (41), which section (63) extends in an axially parallel manner.
  7. Fuel injection valve according to one of Claims 4 to 6, characterized in that the fuel inlet stub (41) is provided at its upstream end with a profile (61) which is similar to saw teeth.
EP04801921A 2003-12-23 2004-11-10 Method for production of a fuel injection valve and fuel injection valve Expired - Fee Related EP1706634B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003160774 DE10360774A1 (en) 2003-12-23 2003-12-23 Method of manufacturing a fuel injector and fuel injector
PCT/EP2004/052904 WO2005064148A1 (en) 2003-12-23 2004-11-10 Method for production of a fuel injection valve and fuel injection valve

Publications (2)

Publication Number Publication Date
EP1706634A1 EP1706634A1 (en) 2006-10-04
EP1706634B1 true EP1706634B1 (en) 2009-08-26

Family

ID=34706488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04801921A Expired - Fee Related EP1706634B1 (en) 2003-12-23 2004-11-10 Method for production of a fuel injection valve and fuel injection valve

Country Status (6)

Country Link
EP (1) EP1706634B1 (en)
JP (1) JP4096008B2 (en)
CN (1) CN100449141C (en)
BR (1) BRPI0406513A (en)
DE (2) DE10360774A1 (en)
WO (1) WO2005064148A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4177775B2 (en) 2004-03-16 2008-11-05 株式会社東芝 Semiconductor substrate, manufacturing method thereof, and semiconductor device
DE102005037953B4 (en) * 2005-08-11 2016-12-08 Robert Bosch Gmbh Fuel injector
DE102005061410A1 (en) 2005-12-22 2007-06-28 Robert Bosch Gmbh Electromagnetically operated valve comprises axle together with core and plastic coil body in which coil is wound
DE102005061424A1 (en) * 2005-12-22 2007-07-05 Robert Bosch Gmbh Fuel injection valve for internal combustion engine, has movable actuating part with valve seat body including saw-tooth structure at outer periphery to provide firm connection with valve seat carrier
DE102005061408A1 (en) 2005-12-22 2007-06-28 Robert Bosch Gmbh Combined plastic and metal component e.g. automotive fuel injection valve has serrated metal edge to plastic interface
JOP20190060A1 (en) * 2016-09-26 2019-03-26 Chugai Pharmaceutical Co Ltd Pyrazolopyridine derivative having glp-1 receptor agonist effect

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127146A5 (en) 1971-02-25 1972-10-13 Brev Etudes Sibe
GB8709712D0 (en) * 1987-04-24 1987-05-28 Lucas Ind Plc Fuel injection nozzle
JP2508776B2 (en) * 1987-12-21 1996-06-19 いすゞ自動車株式会社 Fuel injection nozzle for direct injection diesel engine
DE19829380A1 (en) * 1998-07-01 2000-01-05 Bosch Gmbh Robert Fuel injection valve for IC engines
DE10008554A1 (en) * 2000-02-24 2001-08-30 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
JP3829704B2 (en) * 2001-11-30 2006-10-04 株式会社デンソー Fuel injection valve
JP3884310B2 (en) * 2002-03-22 2007-02-21 愛三工業株式会社 Electromagnetic fuel injection valve
JP4082929B2 (en) * 2002-05-21 2008-04-30 株式会社日立製作所 Fuel injection valve

Also Published As

Publication number Publication date
WO2005064148A1 (en) 2005-07-14
BRPI0406513A (en) 2005-12-20
JP4096008B2 (en) 2008-06-04
CN1898467A (en) 2007-01-17
DE10360774A1 (en) 2005-07-28
DE502004009983D1 (en) 2009-10-08
JP2006510852A (en) 2006-03-30
EP1706634A1 (en) 2006-10-04
CN100449141C (en) 2009-01-07

Similar Documents

Publication Publication Date Title
EP0865574B1 (en) Fuel injection valve and method of producing the same
DE19547406B4 (en) Fuel injector
EP0944769B1 (en) Fuel injection valve
DE2948874C2 (en)
EP0497931B1 (en) Fuel-injection valve and process for its manufacture
EP1114249B1 (en) Fuel injection valve
EP1062421B1 (en) Fuel injector
WO2001011229A1 (en) Fuel injection valve and a method for manufacturing exit oulets on the valve
DE3010613A1 (en) FUEL INJECTION SYSTEM
DE19739850A1 (en) Electromagnetically actuated valve
EP2795092B1 (en) Fuel injection valve
EP1062422B1 (en) Method for mounting a valve module of a fuel injector
WO2002066818A1 (en) Fuel injection valve
DE102009000895B4 (en) fuel injector
EP1706634B1 (en) Method for production of a fuel injection valve and fuel injection valve
EP0659235B1 (en) Electromagnetically controllable fuel injection valve
EP0925441B1 (en) Electromagnetically actuated valve
EP2205853A1 (en) Electromagnetically activated valve
EP3034856B1 (en) Fuel injector valve
EP1402173B1 (en) Fuel injection valve
WO2004101986A9 (en) Fuel injection valve
WO2005019641A1 (en) Fuel-injection valve
EP0890732A2 (en) Electromagnetically actuatable valve
EP1392963A1 (en) Fuel injection valve
DE102016226142A1 (en) Fuel injector

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060724

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR IT

17Q First examination report despatched

Effective date: 20080213

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 502004009983

Country of ref document: DE

Date of ref document: 20091008

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100527

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20101130

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20101126

Year of fee payment: 7

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 502004009983

Country of ref document: DE

Effective date: 20110705

Ref country code: DE

Ref legal event code: R084

Ref document number: 502004009983

Country of ref document: DE

Effective date: 20110516

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190124

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004009983

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200603