EP0455758A1 - Electromagnetically operated fuel-injection valve. - Google Patents

Electromagnetically operated fuel-injection valve.

Info

Publication number
EP0455758A1
EP0455758A1 EP19900914674 EP90914674A EP0455758A1 EP 0455758 A1 EP0455758 A1 EP 0455758A1 EP 19900914674 EP19900914674 EP 19900914674 EP 90914674 A EP90914674 A EP 90914674A EP 0455758 A1 EP0455758 A1 EP 0455758A1
Authority
EP
European Patent Office
Prior art keywords
valve seat
valve
guide cylinder
fuel injection
injection valve
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.)
Granted
Application number
EP19900914674
Other languages
German (de)
French (fr)
Other versions
EP0455758B1 (en
Inventor
Max Greiner
Peter Romann
Ferdinand Reiter
Rudolf Babitzka
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 EP0455758A1 publication Critical patent/EP0455758A1/en
Application granted granted Critical
Publication of EP0455758B1 publication Critical patent/EP0455758B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M51/0682—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 the body being hollow and its interior communicating with the fuel flow
    • 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
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • a generic fuel injection valve is already known from DE-PS 31 02 642.
  • a guide ring with the guide cylinder and the valve seat on the one hand and a part referred to as a nozzle with an outlet opening for the fuel to be injected on the other hand are separate parts.
  • the guide ring is held in the nozzle with a press fit. This requires high dimensional accuracy of the individual parts and a high installation effort for the fuel injector. Slightly exceeding the dimensional tolerances of these individual parts lead to a deformation of the valve seat during assembly of the fuel injection valve and also to poor concentricity of the guide cylinder to the valve seat and the outlet opening. This results in an increasingly uneven fuel jet image.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that the assembly effort is reduced and the guide cylinder, valve seat and injection opening are exactly aligned with the axis of the valve seat body. This high accuracy is possible within narrow tolerances. A consistently precise response of the fuel injection valve with a constantly precise injection time, exact metering of the fuel with an improved fuel spray pattern is achieved. Further advantageous embodiments of the invention result from the subclaims.
  • FIG. 1 shows the sectional view of the valve seat area of a fuel injection valve
  • FIG. 2 shows the valve seat body of the fuel injection valve as a detail.
  • the fuel injection valve 1 shown in FIG. 1 for a fuel injection system of compression-ignition, spark-ignition internal combustion engines has a valve housing 3 with a through opening 4, in which a valve seat body 5 is fastened by means of a welded connection 6.
  • the valve seat body 5 is provided with a central, bore-like guide cylinder 7. Downstream of the guide Cylinder 7, valve seat body 5 also has a valve seat 8 and, subsequently, at least one outlet opening 9 for fuel injection into an intake manifold of an internal combustion engine.
  • a tubular valve closing member 10 with radial openings 11 projects through the passage opening 4.
  • the valve closing member 10 On the side facing the valve seat 8, the valve closing member 10 carries a valve closing body 12, for example in the form of a hardened ball.
  • the valve closing member 10 On the side facing away from the valve seat 8, the valve closing member 10 carries an armature 15 made of soft magnetic material.
  • the valve closing body 12 projects into the guide cylinder 7 with tight play and, when the fuel injection valve 1 is closed, bears against the valve seat 8.
  • the wall of the guide cylinder 7 is provided with swirl grooves 16 extending obliquely to the axis of the valve closing member 10.
  • a groove 22 runs in a ring shape between the guide cylinder 7 and the valve seat 8 and thus interrupts the transition of the swirl grooves 16 to the valve seat 8.
  • a compression spring 17 acts on the valve closing member 10 in the closing direction.
  • a solenoid 18 is arranged adjacent to the armature 15 in such a way that, as soon as it is excited, the armature 15 lifts against the closing direction.
  • valve seat body 5 shown in FIG. 2 clearly shows the swirl grooves 16 which are inclined to the axis of the valve seat body 5.
  • valve seat 8 and the at least one outlet opening 9 can be seen.
  • special machining accuracy is necessary for the guide cylinder 7, to which the valve seat 8 must be concentric, so that the valve closing member 10 lifts or seals quickly from the valve seat 8 when opening and closing.
  • the friction path between the valve closing member 10 and the valve seat 8 is thereby kept as short as possible.
  • An outer surface 20 of the valve seat body 5 may Guide cylinder 7 may be slightly eccentric, since this does not have a disadvantageous effect due to the length of the valve closing member 10 and the spherical shape of the valve closing body 12.
  • an electrical circuit (not shown) of the magnetic coil 18 is closed.
  • the magnetic forces then effective attract armature 15.
  • the valve closing body 12 of the valve closing member 10 is moved away from the valve seat 8 against the pressure spring 17, so that the fuel passes through the valve closing member 10 and its radial openings 11 through the swirl grooves 16 to the valve seat 8 and downstream to it can reach at least one outlet opening 9 and can be hosed down.
  • the circumferential groove 22 between the guide cylinder 7 and the valve seat 8 enables a more uniform fuel distribution, as a result of which the fuel preparation is additionally improved.
  • the final shape of guide cylinders 7 and / or valve seat 8 and / or the swirl grooves 16 in guide cylinder 7 in valve seat body 5 can be produced in a particularly cost-effective and dimensionally accurate manner.
  • the embossing is carried out in a known manner by means of appropriately designed embossing tools.

Landscapes

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

Abstract

La présente invention crée pour un injecteur de carburant à commande électromagnétique (1) pour moteurs à explosion un agencement très précis de l'orifice de sortie, du siège de soupape et du cylindre de guidage les uns par rapport aux autres, et elle augmente ainsi la précision de fonctionnement et le comportement à l'usure de l'injecteur de carburant par le fait que le corps du siège de soupape (5) comporte en une seule pièce dans une zone intérieure, proche de l'axe, à la fois: le cylindre de guidage (7), le siège de soupape (8) et l'orifice de sortie (9). L'invention convient en particulier aux systèmes d'injection de carburant pour moteurs de véhicules.The present invention creates for a fuel injector with electromagnetic control (1) for internal combustion engines a very precise arrangement of the outlet orifice, the valve seat and the guide cylinder with respect to each other, and it thus increases the operating precision and the wear behavior of the fuel injector by the fact that the body of the valve seat (5) comprises in one piece in an interior area, close to the axis, at the same time: the guide cylinder (7), the valve seat (8) and the outlet (9). The invention is particularly suitable for fuel injection systems for vehicle engines.

Description

Elektromagnetisch betätiobares KraftstoffeinspritzventilElectromagnetically actuated fuel injector
Stand der TechnikState of the art
Die Erfindung geht aus von einem Kraftstoffeinspritzventil nach der Gattung des Anspruchs 1.The invention relates to a fuel injection valve according to the preamble of claim 1.
Durch die DE-PS 31 02 642 ist schon ein gattungsgemäßes Kraftstoff¬ einspritzventil bekannt. Bei diesem sind ein Führungsring mit dem FührungsZylinder und dem Ventilsitz einerseits und ein als Düse be¬ zeichnetes Teil mit einer Austrittsöffnung für den einzuspritzenden Kraftstoff andererseits je ein gesondertes Teil. Der Führungsring ist mit Preßsitz in der Düse gehalten. Dies erfordert hohe Maßgenau¬ igkeit der Einzelteile und einen hohen Montageaufwand für das Kraft¬ stoffeinspritzventil. Geringe Überschreitungen der Maßtoleranzen dieser Einzelteile führen bei der Montage des Kraftstoffeinspritz¬ ventils zu einer Verformung des Ventilsitzes und außerdem zu schlechter Konzentrizität des Führungszylinders zum Ventilsitz und zur Austrittsöffnung. Dies hat ein verstärkt ungleichmäßiges Kraft¬ stoffStrahlbild zur Folge. A generic fuel injection valve is already known from DE-PS 31 02 642. In this case, a guide ring with the guide cylinder and the valve seat on the one hand and a part referred to as a nozzle with an outlet opening for the fuel to be injected on the other hand are separate parts. The guide ring is held in the nozzle with a press fit. This requires high dimensional accuracy of the individual parts and a high installation effort for the fuel injector. Slightly exceeding the dimensional tolerances of these individual parts lead to a deformation of the valve seat during assembly of the fuel injection valve and also to poor concentricity of the guide cylinder to the valve seat and the outlet opening. This results in an increasingly uneven fuel jet image.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Kraftstoffeinspritzventil mit den kennzeichnen- den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß der Montageaufwand verringert wird und Fuhrungszylinder, Ventilsitz und Einspritzöffnung genau zur Achse des Ventilsitzkörpers fluchten. Diese hohe Genauigkeit ist innerhalb engerer Toleranzen möglich. Ein konstant präzises Ansprechen des Kraftstoffeinspritzventils bei be¬ ständig genauem Einspritzzeitpunkt, exakter Dosierung des Kraft¬ stoffs bei verbessertem Kraftstoffstrahlbild wird erreicht. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Un¬ teransprüchen.The fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that the assembly effort is reduced and the guide cylinder, valve seat and injection opening are exactly aligned with the axis of the valve seat body. This high accuracy is possible within narrow tolerances. A consistently precise response of the fuel injection valve with a constantly precise injection time, exact metering of the fuel with an improved fuel spray pattern is achieved. Further advantageous embodiments of the invention result from the subclaims.
Besonders vorteilhaft ist es für eine kostengünstige und maßgenaue Herstellung, den Fuhrungszylinder und/oder den Ventilsitz und/oder die Drallnuten durch Prägen zu erzeugen.It is particularly advantageous for economical and dimensionally accurate production to produce the guide cylinder and / or the valve seat and / or the swirl grooves by stamping.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Be¬ schreibung anhand der zugehörigen Zeichnung näher erläutert. Die Fi¬ gur 1 zeigt die Schnittdarstellung des Ventilsitzbereichs eines Kraftstoffeinspritzventils, die Figur 2 zeigt den Ventilsitzkörper des Kraftstoffeinspritzventils als Einzelheit.An embodiment of the invention is explained in more detail in the following description with reference to the accompanying drawing. FIG. 1 shows the sectional view of the valve seat area of a fuel injection valve, FIG. 2 shows the valve seat body of the fuel injection valve as a detail.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Das in Figur 1 gezeigte Kraftstoffeinspritzventil 1 für eine Kraft¬ stoffeinspritzanlage gemischverdichtender, fremdgezündeter Brenn¬ kraftmaschinen hat ein Ventilgehäuse 3 mit einer Durchgangsöffnung 4, in der ein Ventilsitzkörper 5 mittels einer Schweißverbindung 6 befestigt ist. Der Ventilsitzkörper 5 ist mit einem zentralen, boh¬ rungsartigen Führungszylinder 7 versehen. Stromabwärts des Führungs- Zylinders 7 weist der Ventilsitzkörper 5 weiterhin einen Ventilsitz 8 und darauf folgend wenigstens eine Austrittsöffnung 9 zur Kraft¬ stoffeinspritzung in ein Saugrohr einer Brennkraftmaschine auf.The fuel injection valve 1 shown in FIG. 1 for a fuel injection system of compression-ignition, spark-ignition internal combustion engines has a valve housing 3 with a through opening 4, in which a valve seat body 5 is fastened by means of a welded connection 6. The valve seat body 5 is provided with a central, bore-like guide cylinder 7. Downstream of the guide Cylinder 7, valve seat body 5 also has a valve seat 8 and, subsequently, at least one outlet opening 9 for fuel injection into an intake manifold of an internal combustion engine.
Durch die Durchgangsöffnung 4 ragt ein rohrförmiges Ventilschlie߬ glied 10 mit radialen Öffnungen 11. Auf der dem Ventilsitz 8 zuge¬ wandten Seite trägt das Ventilschließglied 10 einen Ventilschlie߬ körper 12, beispielsweise in Form einer gehärteten Kugel. Auf der dem Ventilsitz 8 abgewandten Seite trägt das Ventilschließglied 10 einen Anker 15 aus weichmagnetischem Material. Der Ventilschließkör¬ per 12 ragt mit engem Spiel in den FührungsZylinder 7 und liegt im geschlossenen Zustand des Kraftstoffeinspritzventils 1 am Ventilsitz 8 an. Die Wand des FührungsZylinders 7 ist mit schräg zur Achse des Ventilschließgliedes 10 verlaufenden Drallnuten 16 versehen. Ring¬ förmig läuft zwischen dem FührungsZylinder 7 und dem Ventilsitz 8 eine Nut 22 um und unterbricht damit den Übergang der Drallnuten 16 zum Ventilsitz 8.A tubular valve closing member 10 with radial openings 11 projects through the passage opening 4. On the side facing the valve seat 8, the valve closing member 10 carries a valve closing body 12, for example in the form of a hardened ball. On the side facing away from the valve seat 8, the valve closing member 10 carries an armature 15 made of soft magnetic material. The valve closing body 12 projects into the guide cylinder 7 with tight play and, when the fuel injection valve 1 is closed, bears against the valve seat 8. The wall of the guide cylinder 7 is provided with swirl grooves 16 extending obliquely to the axis of the valve closing member 10. A groove 22 runs in a ring shape between the guide cylinder 7 and the valve seat 8 and thus interrupts the transition of the swirl grooves 16 to the valve seat 8.
In Schließrichtung beaufschlagt eine Druckfeder 17 das Ventil¬ schließglied 10. Eine Magnetspule 18 ist zum Anker 15 benachbart so angeordnet, daß sie, sobald sie erregt wird, den Anker 15 entgegen der Schließrichtung anhebt.A compression spring 17 acts on the valve closing member 10 in the closing direction. A solenoid 18 is arranged adjacent to the armature 15 in such a way that, as soon as it is excited, the armature 15 lifts against the closing direction.
Der in Figur 2 gezeigte Ventilsitzkörper 5 zeigt deutlich die Drall¬ nuten 16, die zur Achse des Ventilsitzkörpers 5 geneigt verlaufen. Außerdem sind der Ventilsitz 8 und die wenigstens eine Austrittsöff¬ nung 9 erkennbar. Bei dieser Ausführungsform des Ventilsitzkörpers 5 ist besondere Bearbeitungsgenauigkeit für den FührungsZylinder 7 notwendig, zu dem der Ventilsitz 8 konzentrisch sein muß, damit das Ventilschließglied 10 beim Öffnen und Schließen schnell vom Ventil¬ sitz 8 abhebt bzw. schnell dichtet. Der Reibweg zwischen Ventil¬ schließglied 10 und Ventilsitz 8 ist dadurch so kurz wie möglich gehalten. Eine Mantelfläche 20 des Ventilsitzkörpers 5 darf zum FührungsZylinder 7 durchaus leicht exzentrisch sein, da sich dies durch die Länge des Ventilschließgliedes 10 und die Kugelform des Ventilschließkörpers 12 nicht nachteilig auswirkt.The valve seat body 5 shown in FIG. 2 clearly shows the swirl grooves 16 which are inclined to the axis of the valve seat body 5. In addition, the valve seat 8 and the at least one outlet opening 9 can be seen. In this embodiment of the valve seat body 5, special machining accuracy is necessary for the guide cylinder 7, to which the valve seat 8 must be concentric, so that the valve closing member 10 lifts or seals quickly from the valve seat 8 when opening and closing. The friction path between the valve closing member 10 and the valve seat 8 is thereby kept as short as possible. An outer surface 20 of the valve seat body 5 may Guide cylinder 7 may be slightly eccentric, since this does not have a disadvantageous effect due to the length of the valve closing member 10 and the spherical shape of the valve closing body 12.
Um das Kraftstoffeinspritzventil 1 zu öffnen, wird ein nicht darge¬ stellter elektrischer Stromkreis der Magnetspule 18 geschlossen. Die daraufhin wirksamen magnetischen Kräfte ziehen den Anker 15 an. Mit diesem gemeinsam wird der Ventilschließkörper 12 des Ventilschlie߬ gliedes 10 vom Ventilsitz 8, entgegen der beaufschlagenden Druckfe¬ der 17 wegbewegt, so daß der Kraftstoff durch das Ventilschließglied 10 und dessen radiale Öffnungen 11 hindurch über die Drallnuten 16 zum Ventilsitz 8 und stromabwärts zu der mindestens einen Austritts¬ öffnung 9 gelangen und abgespritzt werden kann. Die umlaufende Nut 22 zwischen Führungszylinder 7 und dem Ventilsitz 8 ermöglicht eine gleichmäßigere Kraftstoffverteilung, wodurch die Kraftstoffaufberei¬ tung zusätzlich verbessert wird.To open the fuel injection valve 1, an electrical circuit (not shown) of the magnetic coil 18 is closed. The magnetic forces then effective attract armature 15. Together with this, the valve closing body 12 of the valve closing member 10 is moved away from the valve seat 8 against the pressure spring 17, so that the fuel passes through the valve closing member 10 and its radial openings 11 through the swirl grooves 16 to the valve seat 8 and downstream to it can reach at least one outlet opening 9 and can be hosed down. The circumferential groove 22 between the guide cylinder 7 and the valve seat 8 enables a more uniform fuel distribution, as a result of which the fuel preparation is additionally improved.
Besonders kostengünstig und maßgenau sind durch Prägen Führungszy¬ linder 7 und/oder Ventilsitz 8 und/oder die Drallnuten 16 im Fuh¬ rungszylinder 7 im Ventilsitzkörper 5 in ihrer endgültigen Form her¬ stellbar. Das Prägen erfolgt dabei in bekannter Weise mittels ent¬ sprechend gestalteter Prägewerkzeuge. The final shape of guide cylinders 7 and / or valve seat 8 and / or the swirl grooves 16 in guide cylinder 7 in valve seat body 5 can be produced in a particularly cost-effective and dimensionally accurate manner. The embossing is carried out in a known manner by means of appropriately designed embossing tools.

Claims

Ansprüche Expectations
1. Elektromagnetisch betätigbares Kraftstoffeinspritzventil (1) mit einem Ventilgehäuse (3), einem Ventilsitzkörper (5) mit einem Füh¬ rungszylinder (7), in den ein Ventilschließglied (10) ragt, das durch Aufliegen an oder Abheben von einem ebenfalls im Ventilsitz¬ körper (5) vorgesehenen Ventilsitz (8) den Kraftstoffström zu wenig¬ stens einer Austrittsöffnung (9) freigibt oder unterbricht, dadurch gekennzeichnet, daß der Ventilsitzkörper (5) außer dem Führungszy¬ linder (7) und dem Ventilsitz (8) auch die wenigstens eine Aus¬ trittsöffnung (9) enthält.1. Electromagnetically actuated fuel injection valve (1) with a valve housing (3), a valve seat body (5) with a guide cylinder (7) into which a valve closing member (10) protrudes, which also lies in the valve seat by resting on or lifting off Body (5) provided valve seat (8) releases or interrupts the fuel flow to at least one outlet opening (9), characterized in that the valve seat body (5) in addition to the guide cylinder (7) and the valve seat (8) also the at least one contains an outlet opening (9).
2. Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeich¬ net, daß in der Wand des Führungszylinders (7) Drallnuten (16) vorgesehen sind.2. Fuel injection valve according to claim 1, characterized gekennzeich¬ net that in the wall of the guide cylinder (7) swirl grooves (16) are provided.
3. Kraftstoffeinspritzventil nach Anspruch 1 oder 2, dadurch gekenn¬ zeichnet, daß im Ventilsitzkörper (5) zwischen FührungsZylinder (7) und Ventilsitz (8) eine umlaufende Nut (22) vorgesehen ist.3. Fuel injection valve according to claim 1 or 2, characterized gekenn¬ characterized in that a circumferential groove (22) is provided in the valve seat body (5) between the guide cylinder (7) and valve seat (8).
4. Kraftstoffeinspritzventil nach Anspruch 2 oder 3, dadurch gekenn¬ zeichnet, daß der Führungszylinder (7) und/oder der Ventilsitz (8) und/oder die Drallnuten (16) im Ventilsitzkörper (5) durch Prägen hergestellt sind.4. Fuel injection valve according to claim 2 or 3, characterized gekenn¬ characterized in that the guide cylinder (7) and / or the valve seat (8) and / or the swirl grooves (16) in the valve seat body (5) are made by stamping.
i i
5. Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeich¬ net, daß das Ventilgehäuse (3) den Ventilsitzkörper (5) mittels einer Schweißverbindung trägt. 5. Fuel injection valve according to claim 1, characterized gekennzeich¬ net that the valve housing (3) carries the valve seat body (5) by means of a welded connection.
EP90914674A 1989-11-25 1990-10-12 Electromagnetically operated fuel-injection valve Expired - Lifetime EP0455758B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939093 1989-11-25
DE3939093A DE3939093A1 (en) 1989-11-25 1989-11-25 ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE

Publications (2)

Publication Number Publication Date
EP0455758A1 true EP0455758A1 (en) 1991-11-13
EP0455758B1 EP0455758B1 (en) 1994-02-16

Family

ID=6394224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90914674A Expired - Lifetime EP0455758B1 (en) 1989-11-25 1990-10-12 Electromagnetically operated fuel-injection valve

Country Status (10)

Country Link
EP (1) EP0455758B1 (en)
JP (1) JP3167321B2 (en)
KR (1) KR0172131B1 (en)
AU (1) AU635785B2 (en)
BR (1) BR9007081A (en)
CZ (1) CZ279368B6 (en)
DE (2) DE3939093A1 (en)
ES (1) ES2050457T3 (en)
HU (1) HU209966B (en)
WO (1) WO1991008392A1 (en)

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DE4141930B4 (en) * 1991-12-19 2007-02-08 Robert Bosch Gmbh Electromagnetically actuated injection valve
DE4231448C1 (en) * 1992-09-19 1993-10-21 Bosch Gmbh Robert Electromagnetic fuel injection valve for ic engine - with conical taper and radial edge downstream of valve seating surface for providing fine fuel vapour mist
DE4239110A1 (en) * 1992-11-20 1994-05-26 Bosch Gmbh Robert Fuel injector
DE19724091A1 (en) * 1997-06-07 1998-12-10 Bosch Gmbh Robert Valve
DE19829422A1 (en) * 1998-07-01 2000-01-05 Bosch Gmbh Robert Fuel injector
US6669166B2 (en) * 2000-07-28 2003-12-30 Nippon Soken, Inc. Electromagnetic valve
DE10049033B4 (en) * 2000-10-04 2005-08-04 Robert Bosch Gmbh Fuel injector
DE10050751B4 (en) 2000-10-13 2005-08-11 Robert Bosch Gmbh Fuel injector
DE10050752B4 (en) * 2000-10-13 2005-06-02 Robert Bosch Gmbh Fuel injection valve with a swirl-generating element
DE10360706A1 (en) 2003-12-19 2005-07-14 Aweco Appliance Systems Gmbh & Co. Kg Valve and method for manufacturing a valve

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Also Published As

Publication number Publication date
AU6515190A (en) 1991-06-26
DE59004626D1 (en) 1994-03-24
KR0172131B1 (en) 1999-03-20
CZ583590A3 (en) 1993-06-16
KR920701659A (en) 1992-08-12
ES2050457T3 (en) 1994-05-16
BR9007081A (en) 1991-11-26
WO1991008392A1 (en) 1991-06-13
DE3939093A1 (en) 1991-05-29
AU635785B2 (en) 1993-04-01
HUT59739A (en) 1992-06-29
HU209966B (en) 1995-01-30
CZ279368B6 (en) 1995-04-12
JPH04503097A (en) 1992-06-04
JP3167321B2 (en) 2001-05-21
EP0455758B1 (en) 1994-02-16
HU907635D0 (en) 1991-06-28

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