[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0310819A1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

Info

Publication number
EP0310819A1
EP0310819A1 EP88114577A EP88114577A EP0310819A1 EP 0310819 A1 EP0310819 A1 EP 0310819A1 EP 88114577 A EP88114577 A EP 88114577A EP 88114577 A EP88114577 A EP 88114577A EP 0310819 A1 EP0310819 A1 EP 0310819A1
Authority
EP
European Patent Office
Prior art keywords
perforated body
fuel injection
plane
perforated
shoulder
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
EP88114577A
Other languages
German (de)
French (fr)
Other versions
EP0310819B1 (en
Inventor
Ichiei Dr.-Ing. Imafuku
Waldemar Hans
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 EP0310819A1 publication Critical patent/EP0310819A1/en
Application granted granted Critical
Publication of EP0310819B1 publication Critical patent/EP0310819B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M61/18—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
    • F02M61/1853—Orifice plates
    • 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
    • F02M51/0675—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 valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • F02M51/0678—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 valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
    • 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

Definitions

  • the invention relates to a perforated body for use downstream of a valve seat of a fuel injection valve for fuel injection systems of internal combustion engines according to the preamble of the main claim.
  • a fuel injection valve for use in an internal combustion engine in which a perforated body with a plurality of directed bores is arranged downstream of the valve seat.
  • the bores begin in an annular groove which is incorporated in the flat side of the perforated body facing the valve seat and open on the other flat side of the perforated body, wherein they are inclined so that the fuel jets emerging have a swirl.
  • the number of the respective bores and their diameter are adapted to the individual setting requirements. No further adjustment of the spray characteristics is provided on the known perforated body, in particular no adaptation to special geometries and flow conditions of the internal combustion engine.
  • the perforated body according to the invention with the characterizing features of the main claim offers the advantage of a simple, individual adaptation to the particular circumstances of the internal combustion engine.
  • engine-specific peculiarities such as type, flow conditions and operating ranges can already be taken into account during the manufacture of the fuel injector, so that a comparison is also possible within a common production line.
  • FIG. 1 shows an embodiment of a fuel injector provided with the perforated body according to the invention
  • Figure 2 shows a detail of Figure 1 on an enlarged scale.
  • Different perforated bodies are shown in FIGS. 3 to 7, each in a perspective representation (a) and in a section (b).
  • a fuel injection valve for example shown in FIG. 1 for a fuel injection system of a mixture-compressing, spark-ignited internal combustion engine has a valve housing 1 made of ferromagnetic material, in which a magnet coil 3 is arranged on a coil carrier 2.
  • the solenoid 3 has a power supply via a plug connection 4 which is embedded in a plastic ring 5 which partially encompasses the valve housing 1.
  • the coil carrier 2 of the magnet coil 3 is seated in a coil space 6 of the valve housing 1 on a connecting piece 7 which supplies the fuel, for example gasoline, and which projects partially into the valve housing 1.
  • the valve housing 1 partially encloses a nozzle body 9 facing away from the fuel nozzle 7.
  • a cylindrical armature 14 is located between an end face 11 of the connection piece 7 and a stop plate 12, which has a certain thickness and which is placed on an inner shoulder 13 of the valve housing 1, for precise adjustment of the valve.
  • the armature 14 is made of a non-corrosion-sensitive, magnetic material and is located at a small radial distance from a magnetically conductive shoulder of the valve housing 1, thus forming an annular magnetic gap between the armature 14 and shoulder, coaxially in the valve housing 1. From its two end faces is the cylindrical armature 14 with a first 15 and one second 16 coaxial blind bore, the second blind bore 16 opening towards the nozzle body 9. First 15 and second 16 blind holes are connected to one another by a coaxial opening 17.
  • the diameter of the opening 17 is smaller than the diameter of the second blind bore 16.
  • the end section facing the nozzle body 9 the armature 14 is designed as a deformation region 18.
  • This deformation region 18 has the task of positively connecting the armature 14 to the valve needle 27 by gripping around a holding body 28 which forms part of a valve needle 27 and fills the second blind bore 16.
  • the gripping of the holding body 28 by the deformation area 18 of the armature 14 is achieved by pressing material of the deformation area 18 into grooves 29 located on the holding body 28.
  • a compression spring 30 At the bottom of the first coaxial blind bore 15 is a compression spring 30 at one end, which on the other hand rests against a pipe insert 31 fastened in the connecting piece 7 by screwing or caulking and which tends to anchor 14 and valve needle 27 with a force facing away from the connecting piece 7 act upon.
  • the valve needle 27 has two guide sections 39 and 40, which give guidance to the valve needle 27 in the guide bore 35 and leave an axial passage free for the fuel and are designed, for example, as a square.
  • a cylindrical section 43 of smaller diameter adjoins the downstream second guide section 40.
  • a tapered, conical section 44 joins the cylindrical section 43, which ends in a coaxial, preferably cylindrical pin 45.
  • FIG. 2 which shows a detail from FIG. 1, it can be seen that the transition between the cylindrical section 43 and the conical section 44 is rounded - for example in the form of a radius - and forms a sealing section 47 which, in cooperation with a valve seat 48 a tapered valve seat surface 49 of the nozzle body 9 causes the fuel injector to open or close.
  • the tapered valve seat surface 49 of the nozzle body 9 continues in the direction facing away from the armature 14 in a cylindrical nozzle body opening 50, which is approximately the same length as the length of the pin 45, so that an annular gap between the cylindrical nozzle body opening 50 and the cylindrical pin 45 constant cross section remains.
  • the transitions between the conical valve seat surface 49 on the one hand and the cylindrical nozzle body opening 50 on the other hand and the conical section 44 of the valve needle 27 on the one hand and the pin 45 on the other hand are rounded in order to ensure a good flow pattern.
  • the end of the nozzle body 9 in the direction facing away from the armature 14 is formed by a flat side 51 which is interrupted by the mouth of the nozzle body opening 50.
  • the length of the pin 45 is dimensioned such that when the fuel injection valve is closed, the pin 45 does not protrude from the nozzle body opening 50, ie the pin 45 ends immediately in front of the plane defined by the flat side 51 of the nozzle body 9.
  • the flat side 51 of the nozzle body 9 is delimited on the inside by the nozzle body opening 50, it can be delimited on the outside by a conical region 52 which widens in the direction facing the armature 14.
  • a perforated body 55 On the flat side 51 of the nozzle body 9 there is a perforated body 55 provided with spray openings 54a, b, for example in the form of a thin plate, which can be completely flat or which, as shown in the drawing, has a raised edge 56 which is approximately the same Contour of the conical area 52 of the nozzle body 9 follows.
  • the edge 56 on the perforated body 55 can be produced, for example, by deep-drawing the perforated body 55.
  • the attachment of the perforated body 55 on the flat side 51 is ensured by a preparation sleeve 58.
  • the perforated body 55 is pressed with a first surface 59 of the perforated body 55 facing the sealing section 47 against the flat side 51 of the nozzle body 9 by a bottom 60 of a coaxial blind bore 61 of the preparation sleeve 58 pressing the perforated body 55 in an outer area on a second side facing away from the sealing section 47 Area 62 captured.
  • the perforated body 55 is thus clamped between the bottom 60 of the blind bore 61 of the processing sleeve 58 and the flat side 51 of the nozzle body 9.
  • the centering of the perforated body 55 is achieved in that the edge 56 of the perforated body 55 bears against the conical region 52 of the nozzle body 9, so that the perforated body 55 no longer has any radial play.
  • a particularly good centering of the perforated body 55 can be achieved if the edge 56 of the perforated body 55 widens when it is pushed onto the conical area 52, that is to say a radial clamping is carried out.
  • the clamping of the perforated body 55 on its surfaces 59, 62 between the nozzle body 9 and the processing sleeve 58 is realized by screwing the processing sleeve 58 with an internal thread 64 onto an external thread 65 incorporated on the circumference of the nozzle body 9.
  • the processing sleeve 58 can be caulked in an outer groove 68 of the nozzle body 9 by means of a caulking lug 66.
  • the edge of the processing sleeve 58 facing the anchor 14 is used as the caulking nose 66. For caulking, this is bent inwards into the outer groove 68 of the nozzle body 9.
  • the lateral surface of the blind bore 61 which is formed over almost its entire length by the internal thread 64, extends between the edge forming the caulking lug 66 and the bottom 60 of the processing sleeve 58.
  • Internal thread 64 and external thread 65 are preferably designed as fine threads.
  • the preparation sleeve 58 can at the same time serve to axially secure a sealing ring 69 radially surrounding the nozzle body 9, as shown in FIG. 1.
  • a reprocessing bore 70 of preferably cylindrical cross section opens coaxially in the bottom 60 of the reprocessing sleeve 58, which on the other hand ends in a sharp reprocessing edge 71.
  • the preparation edge 71 is surrounded by an annular groove 73.
  • the cross section of the annular groove 73 is approximately trapezoidal in the exemplary embodiment shown, ie both an inner wall 74 of the annular groove 73 and an outer wall 75 of the annular groove 73 are oblique.
  • the preparation edge 71 is formed by the acute angle between the inclined inner wall 74 of the annular groove 73 and the preparation bore 70. This angle should be between 10 and 20 °.
  • the outer wall 75 of the annular groove 73 also forms the inner surface a collar 77.
  • the collar 77 represents the part of the fuel injector which protrudes furthest in the direction facing away from the armature 14.
  • the collar 77 surrounds the preparation edge 71 and at the same time protrudes beyond it.
  • the function of the collar 77 is to secure the recessed preparation edge 71 against damage, for example during the assembly of the fuel injection valve on an internal combustion engine.
  • the perforated body 55 is provided with a plurality of the spray openings 54a, b, which are in particular designed as bores and lead from upstream to downstream of the perforated body 55.
  • the spray openings 54a, b can all have the same diameter or else a differently large diameter.
  • the spray openings 54a, b are of different lengths and in such a way that the spray openings 54b, depending on the exemplary embodiment, are shorter or longer than the further spray openings 54a.
  • the spray openings 54a, b in the first surface 59 open upstream of the perforated body 55 in the annular space formed between the nozzle body opening 50, the pin 45 and the exposed part of the first surface 59.
  • the further spray openings 54a open onto the exposed part of the second surface 62, which is surrounded by the processing bore 70, while the spray openings 54b open into a shoulder 80, which is offset from the second surface 62 and which extends from the exposed part of the second surface 62 of the perforated body 55 is formed.
  • the shoulder 80 is designed as the bottom of an elongated groove 82 extending perpendicular to the paper plane between the surfaces 59, 62.
  • the spray openings 54a, b have central axes 83a, b, which can be inclined or parallel to the longitudinal axis of the fuel injection valve.
  • the inclination of each central axis 83a of the further spray openings 54a with respect to the longitudinal axis of the fuel injection valve can have both a radial and a tangential component.
  • the central axes 83b of the spray openings 54b are shown in the exemplary embodiment shown in FIG. 2 extending axially.
  • the orientation of the spray openings 54a, b or the position of their central axes 83a, b can be adapted to the respective application.
  • the spray openings 54a, b are aligned so that they hit the hot inlet valve of the internal combustion engine exactly.
  • the spray ports 54a, b can be directed to different intake valves.
  • FIGS. 3 to 7 Some examples of embodiments of the perforated body 55 according to the invention can be found in FIGS. 3 to 7.
  • the edge of the perforated body 55 provided with the reference number 56 in FIG. 2 is not shown in each case.
  • the reference numerals correspond to the reference numerals previously used for components having the same effect.
  • FIGS. 3a, b show the same embodiment of the perforated body 55 as has already been described above.
  • the groove 82 is machined outside the axis of symmetry in the second surface 62 of the perforated body 55, interrupting it. If one imagines the upstream first surface 59 of the perforated body 55 in a first plane 91 and the second, downstream surface 62 in a second plane 92, the flat bottom of the elongated groove 82, which represents the step 80, lies in a third levels 91, 92 parallel and intermediate level 93. While each of the further spray openings 54a ends on the one hand in the first level 91 and on the other hand in the second level 92, each of the spray openings 54b extends from the first level 91 to the shoulder 80 in the third Level 93.
  • the downstream second surface 62 is interrupted by a wedge-shaped incision 95.
  • the shoulder 80 is designed as the bottom of a blind hole 98, which starts from the downstream second surface 62.
  • the spray openings 54b run between the first surface 59 and the shoulder 80.
  • a blind hole 99 is provided, which starts from the upstream first surface 59 and the bottom of which forms the shoulder 80, between which and the second surface 62 the spray openings 54b run.
  • the shoulder 80 can also be formed on an elevation 100 which projects beyond the surfaces 59, 62.
  • the spray openings 54b running between the shoulder 80 or the third plane 93 and one of the surfaces 59, 62 are longer than the further spray openings 54a running between the first surface 59 and the second surface 62.
  • the further spray openings 54a each run between the first surface 59 and the second surface 62.
  • the elevation 100 having the shape of a platform being designed as a separate part and being placed on one of the surfaces 59, 62 of the perforated body 55.
  • the perforated body can be produced by embossing, grinding, turning, Elysier or a similar process, the injection orifices by eroding, punching or drilling (also laser drilling, electron beam drilling).
  • the perforated body 55 can also be formed as a component of the nozzle body 9, for example as a base in the nozzle body 9.
  • the length of the spray orifices determines the pressure drop across them (long spray orifices require a high pressure drop with the same diameter, short spray orifices a low pressure drop), the pressure drop at the respective spray orifice and thus the fuel flow rate can be determined by an appropriately selected position of the heel.
  • the number of spray orifices can be varied or, in the manner described, the flow rate of each spray orifice.

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)

Abstract

Perforated bodies are fixed in known fuel injection valves downstream of the valve sealed seat and are provided with ejecting apertures, the size of which proportions the amount of fuel injected. The new perforated body is intended to permit simple adjustment of the size of these ejecting apertures. …<??>The perforated body (55) has a plurality of ejecting apertures (54a, b), which proportion the amount of fuel flowing through by virtue of their geometry and align the injected jet of fuel. The length of individual ejecting apertures (54b) is determined by making reliefs (80) (slots, blind holes, tapered incisions) in flat sides (59, 62) of the perforated body (55). …<??>The perforated body is suitable for use in fuel injection valves for fuel injection systems of internal combustion engines. …<IMAGE>…

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Lochkörper zur Verwendung stromab eines Ventilsitzes eines Kraftstoffeinspritzventiles für Kraftstoff­einspritzanlagen von Brennkraftmaschinen nach der Gattung des Haupt­anspruchs.The invention relates to a perforated body for use downstream of a valve seat of a fuel injection valve for fuel injection systems of internal combustion engines according to the preamble of the main claim.

Es ist bereits ein Kraftstoffeinspritzventil zur Verwendung in einer Brennkraftmaschine bekannt, bei dem stromabwärts des Ventilsitzes ein Lochkörper mit mehreren gerichteten Bohrungen angeordnet ist. Die Bohrungen beginnen in einer ringförmigen Nut, welche in der dem Ventilsitz zugewandten Flachseite des Lochkörpers eingearbeitet ist und münden an der anderen Flachseite des Lochkörpers, wobei sie so geneigt sind, daß die austretenden Kraftstoffstrahlen einen Drall aufweisen. Zum Mengenabgleich des Kraftstoffeinspritzventiles wird die Anzahl der jeweiligen Bohrungen und deren Durchmesser den indi­viduellen Einstellerfordernissen angepaßt. Eine weitergehende Ein­stellung der Abspritzcharakteristik ist an dem bekannten Lochkörper nicht vorgesehen, insbesondere keine Anpassung an spezielle Geome­trien und Strömungsverhältnisse der Brennkraftmaschine.A fuel injection valve for use in an internal combustion engine is already known, in which a perforated body with a plurality of directed bores is arranged downstream of the valve seat. The bores begin in an annular groove which is incorporated in the flat side of the perforated body facing the valve seat and open on the other flat side of the perforated body, wherein they are inclined so that the fuel jets emerging have a swirl. To compare the quantity of the fuel injection valve, the number of the respective bores and their diameter are adapted to the individual setting requirements. No further adjustment of the spray characteristics is provided on the known perforated body, in particular no adaptation to special geometries and flow conditions of the internal combustion engine.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Lochkörper mit den kennzeichnenden Merkmalen des Hauptanspruchs bietet demgegenüber den Vorteil einer einfachen, individuellen Anpassung an die besonderen Gegebenheiten der Brenn­kraftmaschine. Insbesondere sind motorspezifische Eigenheiten wie Bauart, Strömungsverhältnisse und Betriebsbereiche bereits bei der Herstellung des Kraftstoffeinspritzventiles berücksichtigbar, so daß ein Abgleich auch innerhalb einer gemeinsamen Fertigungslinie mög­lich ist.The perforated body according to the invention with the characterizing features of the main claim offers the advantage of a simple, individual adaptation to the particular circumstances of the internal combustion engine. In particular, engine-specific peculiarities such as type, flow conditions and operating ranges can already be taken into account during the manufacture of the fuel injector, so that a comparison is also possible within a common production line.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vor­teilhafte Weiterbildungen des im Hauptanspruch angegebenen Lochkör­pers möglich.Advantageous developments of the perforated body specified in the main claim are possible through the measures listed in the subclaims.

Vorteilhaft ist es insbesondere, die Abspritzöffnungen unterschied­lich stark zur Längsachse des Kraftstoffeinspritzventils zu neigen. Auf diese Weise ist es beispielsweise möglich, die Kraftstoff­strahlen auf mehrere, unabhängige Einlaßkanäle der Brennkraftma­schine zu richten.It is particularly advantageous to incline the spray openings to the longitudinal axis of the fuel injection valve to different degrees. In this way it is possible, for example, to direct the fuel jets onto a plurality of independent inlet channels of the internal combustion engine.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und werden in der nachfolgenden Beschreibung näher er­läutert. Figur 1 zeigt eine Ausführungsform eines mit dem erfin­dungsgemäßen Lochkörper versehenen Kraftstoffeinspritzventiles, Figur 2 einen Ausschnitt aus Figur 1 in vergrößertem Maßstab. In den Figuren 3 bis 7 sind, jeweils in einer perspektivischen Darstellung (a) und in einem Schnitt (b), verschiedene Lochkörper dargestellt.Exemplary embodiments of the invention are shown in simplified form in the drawing and are explained in more detail in the description below. Figure 1 shows an embodiment of a fuel injector provided with the perforated body according to the invention, Figure 2 shows a detail of Figure 1 on an enlarged scale. Different perforated bodies are shown in FIGS. 3 to 7, each in a perspective representation (a) and in a section (b).

Beschreibung der AusführungsbeispieleDescription of the embodiments

Ein in Figur 1 beispielsweise dargestelltes Kraftstoffeinspritzven­til für eine Kraftstoffeinspritzanlage einer gemischverdichtenden, fremdgezündeten Brennkraftmaschine hat ein Ventilgehäuse 1 aus fer­romagnetischem Material, in dem auf einem Spulenträger 2 eine Mag­netspule 3 angeordnet ist. Die Magnetspule 3 hat eine Stromzuführung über einen Steckanschluß 4, der in einem das Ventilgehäuse 1 teil­weise umgreifenden Kunststoffring 5 eingebettet ist.A fuel injection valve for example shown in FIG. 1 for a fuel injection system of a mixture-compressing, spark-ignited internal combustion engine has a valve housing 1 made of ferromagnetic material, in which a magnet coil 3 is arranged on a coil carrier 2. The solenoid 3 has a power supply via a plug connection 4 which is embedded in a plastic ring 5 which partially encompasses the valve housing 1.

Der Spulenträger 2 der Magnetspule 3 sitzt in einem Spulenraum 6 des Ventilgehäuses 1 auf einem den Kraftstoff, beispielsweise Benzin, zuführenden Anschlußstutzen 7, der teilweise in das Ventilgehäuse 1 ragt. Das Ventilgehäuse 1 umschließt dem Kraftstoffstutzen 7 abge­wandt teilweise einen Düsenkörper 9.The coil carrier 2 of the magnet coil 3 is seated in a coil space 6 of the valve housing 1 on a connecting piece 7 which supplies the fuel, for example gasoline, and which projects partially into the valve housing 1. The valve housing 1 partially encloses a nozzle body 9 facing away from the fuel nozzle 7.

Zwischen einer Stirnfläche 11 des Anschlußstutzens 7 und einer zum genauen Einstellen des Ventils eine bestimmte Dicke aufweisenden An­schlagplatte 12, die auf eine Innenschulter 13 des Ventilgehäuses 1 aufgesetzt ist, befindet sich ein zylindrischer Anker 14. Der Anker 14 besteht aus einem nicht korrosionsanfälligen, magnetischen Mate­rial und befindet sich mit geringem radialen Abstand zu einem magne­tisch leitfähigen Absatz des Ventilgehäuses 1, auf diese Weise zwi­schen Anker 14 und Absatz einen ringförmigen Magnetspalt bildend, koaxial im Ventilgehäuse 1. Von seinen beiden Stirnflächen aus ist der zylindrische Anker 14 mit einer ersten 15 und einer zweiten 16 koaxialen Sackbohrung versehen, wobei die zweite Sackbohrung 16 sich zum Düsenkörper 9 hin öffnet. Erste 15 und zweite 16 Sackbohrung sind miteinander durch eine koaxiale Öffnung 17 verbunden. Der Durchmesser der Öffnung 17 ist kleiner als der Durchmesser der zwei­ten Sackbohrung 16. Der dem Düsenkörper 9 zugewandte Endabschnitt des Ankers 14 ist als Verformungsbereich 18 ausgeführt. Dieser Ver­formungsbereich 18 hat die Aufgabe, durch Umgreifen eines, einen Teil einer Ventilnadel 27 bildenden und die zweite Sackbohrung 16 aussfüllenden Haltekörpers 28 den Anker 14 mit der Ventilnadel 27 formschlüssig zu verbinden. Das Umgreifen des Haltekörpers 28 durch den Verformungsbereich 18 des Ankers 14 wird durch Einpressen von Material des Verformungsbereichs 18 in am Haltekörper 28 befindliche Rillen 29 erreicht.A cylindrical armature 14 is located between an end face 11 of the connection piece 7 and a stop plate 12, which has a certain thickness and which is placed on an inner shoulder 13 of the valve housing 1, for precise adjustment of the valve. The armature 14 is made of a non-corrosion-sensitive, magnetic material and is located at a small radial distance from a magnetically conductive shoulder of the valve housing 1, thus forming an annular magnetic gap between the armature 14 and shoulder, coaxially in the valve housing 1. From its two end faces is the cylindrical armature 14 with a first 15 and one second 16 coaxial blind bore, the second blind bore 16 opening towards the nozzle body 9. First 15 and second 16 blind holes are connected to one another by a coaxial opening 17. The diameter of the opening 17 is smaller than the diameter of the second blind bore 16. The end section facing the nozzle body 9 the armature 14 is designed as a deformation region 18. This deformation region 18 has the task of positively connecting the armature 14 to the valve needle 27 by gripping around a holding body 28 which forms part of a valve needle 27 and fills the second blind bore 16. The gripping of the holding body 28 by the deformation area 18 of the armature 14 is achieved by pressing material of the deformation area 18 into grooves 29 located on the holding body 28.

Am Boden der ersten koaxialen Sackbohrung 15 liegt eine Druckfeder 30 mit ihrem einen Ende an, welche andererseits an einem im An­schlußstutzen 7 durch Verschrauben oder Verstemmen befestigten Rohr­einsatz 31 anliegt und welche bestrebt ist, Anker 14 und Ventilnadel 27 mit einer vom Anschlußstutzen 7 abgewandten Kraft zu beaufschla­gen.At the bottom of the first coaxial blind bore 15 is a compression spring 30 at one end, which on the other hand rests against a pipe insert 31 fastened in the connecting piece 7 by screwing or caulking and which tends to anchor 14 and valve needle 27 with a force facing away from the connecting piece 7 act upon.

Die Ventilnadel 27 durchdringt mit radialem Abstand eine Durchgangs­bohrung 34 in der Anschlagplatte 12 und wird in einer Führungsboh­rung 35 des Düsenkörpers 9 geführt. In der Anschlagplatte 12 ist eine von der Durchgangsbohrung 34 zum Umfang der Anschlagplatte 12 führende Aussparung 37 vorgesehen, deren Lichte Weite größer ist als der Durchmesser der Ventilnadel 27 in ihrem von der Anschlagplatte 12 umgebenen Bereich.The valve needle 27 penetrates a through hole 34 in the stop plate 12 at a radial distance and is guided in a guide hole 35 of the nozzle body 9. Provided in the stop plate 12 is a recess 37 leading from the through hole 34 to the circumference of the stop plate 12, the clear width of which is larger than the diameter of the valve needle 27 in its area surrounded by the stop plate 12.

Die Ventilnadel 27 hat zwei Führungsabschnitte 39 und 40, die der Ventilnadel 27 in der Führungsbohrung 35 Führung geben sowie einen Axialdurchgang für den Kraftstoff freilassen und beispielsweise als Vierkante ausgebildet sind.The valve needle 27 has two guide sections 39 and 40, which give guidance to the valve needle 27 in the guide bore 35 and leave an axial passage free for the fuel and are designed, for example, as a square.

An den stromabwärts liegenden zweiten Führungsabschnitt 40 schließt sich ein zylindrischer Abschnitt 43 geringeren Durchmessers an. An den zylindrischen Abschnitt 43 wiederum fügt sich ein zulaufender, kegeliger Abschnitt 44, welcher in einem koaxialen, bevorzugt zylin­drischen Zapfen 45 ausläuft.A cylindrical section 43 of smaller diameter adjoins the downstream second guide section 40. In turn, a tapered, conical section 44 joins the cylindrical section 43, which ends in a coaxial, preferably cylindrical pin 45.

In der einen Ausschnitt aus Figur 1 darstellenden Figur 2 ist zu er­kennen, daß der Übergang zwischen dem zylindrischen Abschnitt 43 und dem kegeligen Abschnitt 44 gerundet ist - etwa in Form eines Radi­us - und einen Dichtabschnitt 47 bildet, welcher im Zusammenwirken mit einem Ventilsitz 48 auf einer kegeligen Ventilsitzfläche 49 des Düsenkörpers 9 ein Öffnen bzw. Schließen des Kraftstoffeinspritz­ventiles bewirkt. Die kegelige Ventilsitzfläche 49 des Düsenkörpers 9 setzt sich in der dem Anker 14 abgewandten Richtung in einer zy­lindrischen Düsenkörperöffnung 50 fort, welche auf ungefähr gleicher Länge wie die Länge des Zapfens 45 verläuft, so daß zwischen der zy­lindrischen Düsenkörperöffnung 50 und dem zylindrischen Zapfen 45 ein Ringspalt konstanten Querschnitts verbleibt. Die Übergänge zwi­schen der kegeligen Ventilsitzfläche 49 einerseits und der zylindri­schen Düsenkörperöffnung 50 andererseits sowie dem kegeligen Ab­schnitt 44 der Ventilnadel 27 einerseits und dem Zapfen 45 anderer­seits sind gerundet, um einen guten Strömungsverlauf zu gewähr­leisten. Den Abschluß des Düsenkörpers 9 in der dem Anker 14 abge­wandten Richtung bildet eine Flachseite 51, welche durch die Mündung der Düsenkörperöffnung 50 unterbrochen ist.In FIG. 2, which shows a detail from FIG. 1, it can be seen that the transition between the cylindrical section 43 and the conical section 44 is rounded - for example in the form of a radius - and forms a sealing section 47 which, in cooperation with a valve seat 48 a tapered valve seat surface 49 of the nozzle body 9 causes the fuel injector to open or close. The tapered valve seat surface 49 of the nozzle body 9 continues in the direction facing away from the armature 14 in a cylindrical nozzle body opening 50, which is approximately the same length as the length of the pin 45, so that an annular gap between the cylindrical nozzle body opening 50 and the cylindrical pin 45 constant cross section remains. The transitions between the conical valve seat surface 49 on the one hand and the cylindrical nozzle body opening 50 on the other hand and the conical section 44 of the valve needle 27 on the one hand and the pin 45 on the other hand are rounded in order to ensure a good flow pattern. The end of the nozzle body 9 in the direction facing away from the armature 14 is formed by a flat side 51 which is interrupted by the mouth of the nozzle body opening 50.

Die Länge des Zapfens 45 ist so bemessen, daß bei geschlossenem Kraftstoffeinspritzventil der Zapfen 45 gerade nicht aus der Düsen­körperöffnung 50 hinausragt, d.h. der Zapfen 45 endet unmittelbar vor der durch die Flachseite 51 des Düsenkörpers 9 definierten Ebene.The length of the pin 45 is dimensioned such that when the fuel injection valve is closed, the pin 45 does not protrude from the nozzle body opening 50, ie the pin 45 ends immediately in front of the plane defined by the flat side 51 of the nozzle body 9.

Während die Flachseite 51 des Düsenkörpers 9 innen durch die Düsen­körperöffnung 50 begrenzt ist, kann sie außen durch einen konischen Bereich 52 begrenzt sein, welcher sich in der dem Anker 14 zuge­wandten Richtung erweitert.While the flat side 51 of the nozzle body 9 is delimited on the inside by the nozzle body opening 50, it can be delimited on the outside by a conical region 52 which widens in the direction facing the armature 14.

An der Flachseite 51 des Düsenkörpers 9 liegt ein mit Abspritzöff­nungen 54a, b versehener, beispielsweise als dünnes Plättchen ausge­bildeter Lochkörper 55 an, welcher vollkommen eben ausgebildet sein kann oder welcher, wie in der Zeichnung dargestellt, einen hochge­zogenen Rand 56 aufweist, der in etwa der Kontur des konischen Bereiches 52 des Düsenkörpers 9 folgt. Die Herstellung des Randes 56 am Lochkörper 55 kann etwa durch Tiefziehen des Lochkörpers 55 be­werkstelligt werden. Die Befestigung des Lochkörpers 55 an der Flachseite 51 wird durch eine Aufbereitungshülse 58 gewährleistet. Der Lochkörper 55 wird mit einer dem Dichtabschnitt 47 zugewandten ersten Fläche 59 des Lochkörpers 55 gegen die Flachseite 51 des Dü­senkörpers 9 gedrückt, indem ein Boden 60 einer koaxialen Sackboh­rung 61 der Aufbereitungshülse 58 den Lochkörper 55 in einem äußeren Bereich an einer dem Dichtabschnitt 47 abgewandten zweiten Fläche 62 erfaßt. Der Lochkörper 55 ist also zwischen dem Boden 60 der Sack­bohrung 61 der Aufbereitungshülse 58 und der Flachseite 51 des Dü­senkörpers 9 eingespannt. Die Zentrierung des Lochkörpers 55 wird dabei erreicht, indem sich der Rand 56 des Lochkörpers 55 an den konischen Bereich 52 des Düsenkörpers 9 anlegt, der Lochkörper 55 somit kein radiales Spiel mehr aufweist. Eine besonders gute Zen­trierung des Lochkörpers 55 ist erreichbar, wenn sich der Rand 56 des Lochkörpers 55 beim Aufschieben auf den konischen Bereich 52 aufweitet, also eine radiale Einspannung vorgenommen wird.On the flat side 51 of the nozzle body 9 there is a perforated body 55 provided with spray openings 54a, b, for example in the form of a thin plate, which can be completely flat or which, as shown in the drawing, has a raised edge 56 which is approximately the same Contour of the conical area 52 of the nozzle body 9 follows. The edge 56 on the perforated body 55 can be produced, for example, by deep-drawing the perforated body 55. The attachment of the perforated body 55 on the flat side 51 is ensured by a preparation sleeve 58. The perforated body 55 is pressed with a first surface 59 of the perforated body 55 facing the sealing section 47 against the flat side 51 of the nozzle body 9 by a bottom 60 of a coaxial blind bore 61 of the preparation sleeve 58 pressing the perforated body 55 in an outer area on a second side facing away from the sealing section 47 Area 62 captured. The perforated body 55 is thus clamped between the bottom 60 of the blind bore 61 of the processing sleeve 58 and the flat side 51 of the nozzle body 9. The centering of the perforated body 55 is achieved in that the edge 56 of the perforated body 55 bears against the conical region 52 of the nozzle body 9, so that the perforated body 55 no longer has any radial play. A particularly good centering of the perforated body 55 can be achieved if the edge 56 of the perforated body 55 widens when it is pushed onto the conical area 52, that is to say a radial clamping is carried out.

Die Einspannung des Lochkörpers 55 an seinen Flächen 59, 62 zwischen Düsenkörper 9 und Aufbereitungshülse 58 wird realisiert, indem die Aufbereitungshülse 58 mit einem Innengewinde 64 auf ein am Umfang des Düsenkörpers 9 eingearbeitetes Außengewinde 65 geschraubt wird. Um die Lage der Aufbereitungshülse 58 relativ zum Düsenkörper 9 nach erfolgter Verschraubung zu sichern, kann die Aufbereitungshülse 58 mittels einer Stemmnase 66 in einer Außennut 68 des Düsenkörpers 9 verstemmt werden. Als Stemmnase 66 findet der dem Anker 14 zuge­wandte Rand der Aufbereitungshülse 58 Verwendung. Zur Verstemmung wird dieser nach innen in die Außennut 68 des Düsenkörpers 9 gebo­gen. Zwischen dem die Stemmnase 66 bildenden Rand und dem Boden 60 der Aufbereitungshülse 58 erstreckt sich die Mantelfläche der Sackbohrung 61, welche fast auf ihrer gesamten Länge durch das In­nengewinde 64 gebildet wird. Innengewinde 64 und Außengewinde 65 werden vorzugsweise als Feingewinde ausgeführt. Die Aufbereitungs­hülse 58 kann gleichzeitig dazu dienen, einen den Düsenkörper 9 radial umfassenden Dichtring 69 axial zu sichern, wie in Figur 1 dargestellt ist.The clamping of the perforated body 55 on its surfaces 59, 62 between the nozzle body 9 and the processing sleeve 58 is realized by screwing the processing sleeve 58 with an internal thread 64 onto an external thread 65 incorporated on the circumference of the nozzle body 9. In order to secure the position of the processing sleeve 58 relative to the nozzle body 9 after screwing, the processing sleeve 58 can be caulked in an outer groove 68 of the nozzle body 9 by means of a caulking lug 66. The edge of the processing sleeve 58 facing the anchor 14 is used as the caulking nose 66. For caulking, this is bent inwards into the outer groove 68 of the nozzle body 9. The lateral surface of the blind bore 61, which is formed over almost its entire length by the internal thread 64, extends between the edge forming the caulking lug 66 and the bottom 60 of the processing sleeve 58. Internal thread 64 and external thread 65 are preferably designed as fine threads. The preparation sleeve 58 can at the same time serve to axially secure a sealing ring 69 radially surrounding the nozzle body 9, as shown in FIG. 1.

Koaxial im Boden 60 der Aufbereitungshülse 58 mündet eine Aufberei­tungsbohrung 70 von vorzugsweise zylindrischem Querschnitt, welche andererseits in einer scharfen Aufbereitungskante 71 mündet. Die Aufbereitungskante 71 ist von einer Ringnut 73 umgeben. Der Quer­schnitt der Ringnut 73 ist bei dem gezeigten Ausführungsbeispiel in etwa trapezförmig, d.h. sowohl eine innere Wand 74 der Ringnut 73 als auch eine äußere Wand 75 der Ringnut 73 sind schräg. Die Aufbe­reitungskante 71 wird durch den spitzen Winkel zwischen der schrägen inneren Wand 74 der Ringnut 73 und der Aufbereitungsbohrung 70 ge­bildet. Dieser Winkel sollte zwischen 10 und 20° betragen. Die äuße­re Wand 75 der Ringnut 73 bildet gleichzeitig die innere Fläche eines Kragens 77. Der Kragen 77 stellt das in der dem Anker 14 abge­wandten Richtung am weitesten vorstehende Teil des Kraftstoffein­spritzventiles dar. Der Kragen 77 umschließt die Aufbereitungskante 71 und ragt gleichzeitig über diese hinaus. Aufgabe des Kragens 77 ist es, die zurückversetzte Aufbereitungskante 71 vor Beschädigungen zu sichern, etwa während der Montage des Kraftstoffeinspritzventils an eine Brennkraftmaschine.A reprocessing bore 70 of preferably cylindrical cross section opens coaxially in the bottom 60 of the reprocessing sleeve 58, which on the other hand ends in a sharp reprocessing edge 71. The preparation edge 71 is surrounded by an annular groove 73. The cross section of the annular groove 73 is approximately trapezoidal in the exemplary embodiment shown, ie both an inner wall 74 of the annular groove 73 and an outer wall 75 of the annular groove 73 are oblique. The preparation edge 71 is formed by the acute angle between the inclined inner wall 74 of the annular groove 73 and the preparation bore 70. This angle should be between 10 and 20 °. The outer wall 75 of the annular groove 73 also forms the inner surface a collar 77. The collar 77 represents the part of the fuel injector which protrudes furthest in the direction facing away from the armature 14. The collar 77 surrounds the preparation edge 71 and at the same time protrudes beyond it. The function of the collar 77 is to secure the recessed preparation edge 71 against damage, for example during the assembly of the fuel injection valve on an internal combustion engine.

Der Lochkörper 55 ist mit mehreren der insbesondere als Bohrungen ausgeführten Abspritzöffnungen 54a, b versehen, welche von stromauf nach stromab des Lochkörpers 55 Führen. Die Abspritzöffnungen 54a, b können alle den gleichen Durchmesser aufweisen oder aber einen un­terschiedlich großen Durchmesser. Weiterhin sind die Abspritzöffnun­gen 54a, b unterschiedlich lang und zwar derart, daß die Abspritz­öffnungen 54b, je nach Ausführungsbeispiel, kürzer oder länger als die weiteren Abspritzöffnungen 54a ausgebildet sind. Stromaufwärts des Lochkörpers 55 öffnen sich bei dem Ausführungsbeispiel nach Figur 2 die Abspritzöffnungen 54a, b in der ersten Fläche 59 in den zwischen der Düsenkörperöffnung 50, dem Zapfen 45 und dem freilie­genden Teil der ersten Fläche 59 gebildeten Ringraum. Stromabwärts des Lochkörpers 55 münden die weiteren Abspritzöffnungen 54a auf dem freiliegenen, von der Aufbereitungsbohrung 70 umgebenen Teil der zweiten Fläche 62, während die Abspritzöffnungen 54b in einem von der zweiten Fläche 62 abgesetzten Absatz 80 münden, welcher am frei­liegenden Teil der zweiten Fläche 62 des Lochkörpers 55 ausgebildet ist. Bei dem in Figur 2 dargestellten Ausführungsbeispiel ist der Absatz 80 als Boden einer senkrecht zur Papierebene zwischen den Flächen 59, 62 verlaufenden längliche Nut 82 ausgeführt.The perforated body 55 is provided with a plurality of the spray openings 54a, b, which are in particular designed as bores and lead from upstream to downstream of the perforated body 55. The spray openings 54a, b can all have the same diameter or else a differently large diameter. Furthermore, the spray openings 54a, b are of different lengths and in such a way that the spray openings 54b, depending on the exemplary embodiment, are shorter or longer than the further spray openings 54a. In the exemplary embodiment according to FIG. 2, the spray openings 54a, b in the first surface 59 open upstream of the perforated body 55 in the annular space formed between the nozzle body opening 50, the pin 45 and the exposed part of the first surface 59. Downstream of the perforated body 55, the further spray openings 54a open onto the exposed part of the second surface 62, which is surrounded by the processing bore 70, while the spray openings 54b open into a shoulder 80, which is offset from the second surface 62 and which extends from the exposed part of the second surface 62 of the perforated body 55 is formed. In the embodiment shown in Figure 2, the shoulder 80 is designed as the bottom of an elongated groove 82 extending perpendicular to the paper plane between the surfaces 59, 62.

Die Abspritzöffnungen 54a, b weisen Mittelachsen 83a, b auf, welche geneigt oder parallel zur Längsachse des Kraftstoffeinspritzventils verlaufen können. Dabei kann die Neigung jeder Mittelachse 83a der weiteren Abspritzöffnungen 54a bezüglich der Längsachse des Kraft­stoffeinspritzventils sowohl eine radiale als auch eine tangentiale Komponente aufweisen. Die Mittelachsen 83b der Abspritzöffnungen 54b sind bei dem in Figur 2 dargestellten Ausführungsbeispiel axial ver­laufend dargestellt.The spray openings 54a, b have central axes 83a, b, which can be inclined or parallel to the longitudinal axis of the fuel injection valve. The inclination of each central axis 83a of the further spray openings 54a with respect to the longitudinal axis of the fuel injection valve can have both a radial and a tangential component. The central axes 83b of the spray openings 54b are shown in the exemplary embodiment shown in FIG. 2 extending axially.

Bei von Strom durchflossener Magnetspule 3 wird der Anker 14 in Richtung auf den Anschlußstutzen 7 gezogen. Die mit dem Anker 14 fest verbundene Ventilnadel 27 hebt mit ihren Dichtabschnitt 47 von der kegeligen Ventilsitzfläche 49 ab, zwischen Dichtabschnitt 47 und dem Ventilsitz 48 der kegeligen Ventilsitzfläche 49 wird ein Strö­mungsquerschnitt freigegeben, der Kraftstoff kann durch den zwischen Düsenkörperöffnung 50 und Zapfen 45 gelegenen Ringraum zu den Ab­spritzöffnungen 54a, b gelangen. Die Abspritzöffnungen 54a, b werden vom Kraftstoff unter hohem Druckabfall durchströmt, da diese den engsten Strömungsquerschnitt innerhalb des Kraftstoffeinspritzven­tiles bilden. Die Geometrie der Abspritzöffnungen 54a, b entscheidet also über den Mengenstrom des abgespritzten Kraftstoffes, der Fach­mann spricht hierbei von "Zumessung".When current flows through the magnet coil 3, the armature 14 is pulled in the direction of the connecting piece 7. The valve needle 27, which is firmly connected to the armature 14, lifts off with its sealing section 47 from the conical valve seat surface 49, a flow cross section is released between the sealing section 47 and the valve seat 48 of the conical valve seat surface 49, the fuel can flow through the annular space located between the nozzle body opening 50 and the pin 45 get to the spray openings 54a, b. The spray openings 54a, b are flowed through by the fuel under a high pressure drop, since these form the narrowest flow cross section within the fuel injection valve. The geometry of the spray openings 54a, b thus decides the mass flow of the sprayed fuel, the person skilled in the art speaks of "metering".

Die Ausrichtung der Abspritzöffnungen 54a, b bzw. die Lage von deren Mittelachsen 83a, b kann dem jeweiligen Anwendungsfall angepaßt wer­den. Im Normalfall werden die Abspritzöffnungen 54a, b so ausgerich­tet, daß sie genau auf das heiße Einlaßventil der Brennkraftmaschine auftreffen. Insbesondere können jedoch bei der Anwendung in einer Brennkraftmaschine mit zwei Einlaßventilen pro Zylinder die Ab­spritzöffnungen 54a, b auf unterschiedliche Einlaßventile gerichtet werden.The orientation of the spray openings 54a, b or the position of their central axes 83a, b can be adapted to the respective application. In the normal case, the spray openings 54a, b are aligned so that they hit the hot inlet valve of the internal combustion engine exactly. In particular, however, when used in an internal combustion engine with two intake valves per cylinder, the spray ports 54a, b can be directed to different intake valves.

Einige Beispiele für erfindungsgemäße Ausführungen des Lochkörpers 55 finden sich in den Figuren 3 bis 7. Der in Figur 2 mit dem Be­zugszeichen 56 versehene Rand des Lochkörpers 55 ist dabei jeweils nicht dargestellt. Die Bezugszeichen entsprechen den bisher für gleichwirkende Bauteile verwendeten Bezugszeichen.Some examples of embodiments of the perforated body 55 according to the invention can be found in FIGS. 3 to 7. The edge of the perforated body 55 provided with the reference number 56 in FIG. 2 is not shown in each case. The reference numerals correspond to the reference numerals previously used for components having the same effect.

Die Figuren 3a, b zeigen die gleiche Ausführungsform des Lochkörpers 55, wie sie schon oben beschrieben wurde. Die Nut 82 ist außerhalb der Symmetrieachse in die zweite Fläche 62 des Lochkörpers 55, diese unterbrechend, eingearbeitet. Denkt man sich die stromaufwärts ge­richtete erste Fläche 59 des Lochkörpers 55 in einer ersten Ebene 91, die zweite, stromabwärts gerichtete Fläche 62 in einer zweiten Ebene 92 liegend, so liegt der den Absatz 80 darstellende ebene Bo­den der länglichen Nut 82 in einer dritten, zu den Ebenen 91, 92 parallelen und dazwischenliegenden Ebene 93. Während jede der wei­teren Abspritzöffnungen 54a einerseits in der ersten Ebene 91 und andererseits in der zweiten Ebene 92 endet, erstreckt sich jede der Abspritzöffnungen 54b von der ersten Ebene 91 bis zum Absatz 80 in der dritten Ebene 93.FIGS. 3a, b show the same embodiment of the perforated body 55 as has already been described above. The groove 82 is machined outside the axis of symmetry in the second surface 62 of the perforated body 55, interrupting it. If one imagines the upstream first surface 59 of the perforated body 55 in a first plane 91 and the second, downstream surface 62 in a second plane 92, the flat bottom of the elongated groove 82, which represents the step 80, lies in a third levels 91, 92 parallel and intermediate level 93. While each of the further spray openings 54a ends on the one hand in the first level 91 and on the other hand in the second level 92, each of the spray openings 54b extends from the first level 91 to the shoulder 80 in the third Level 93.

Bei dem in den Figuren 4a, b dargestellten Lochkörper 55 wird die stromabwärts gerichtete zweite Fläche 62 von einem keilförmigen Ein­schnitt 95 unterbrochen. Der den Absatz 80 bildende Boden des keil­förmigen Einschnittes 95, an dem die Abspritzöffnungen 54b münden, definiert die dritte Ebene 93, welche unter einem Winkel zur ersten Ebene 91 und zweiten Ebene 92 verläuft. Vorteilhaft kann es sein, den keilförmigen Einschnitt 95 so auszuführen, daß die Mittelachsen 83b der Abspritzöffnungen 54b in einem rechten Winkel 97 zur dritten Ebene 93 bzw. zum Absatz 80 des keilförmigen Einschnittes 95 ver­laufen. Durch den senkrecht zum Absatz 80 austretenden Kraftstoff­strahl bleibt dieser besonders gleichmäßig.4a, b, the downstream second surface 62 is interrupted by a wedge-shaped incision 95. The bottom of the wedge-shaped incision 95 forming the shoulder 80, at which the spray openings 54b open, defines the third plane 93, which extends at an angle to the first plane 91 and second plane 92. It can be advantageous to make the wedge-shaped incision 95 such that the central axes 83b of the spray openings 54b run at a right angle 97 to the third plane 93 or to the shoulder 80 of the wedge-shaped incision 95. Due to the fuel jet emerging perpendicularly to paragraph 80, it remains particularly uniform.

Bei dem in den Figuren 5a, b dargestellten Lochkörper 55 ist der Ab­satz 80 als Boden eines Sackloches 98 ausgeführt, welches von der stromabwärts gerichteten zweiten Fläche 62 ausgeht. Die Abspritz­öffnungen 54b verlaufen zwischen der ersten Fläche 59 und dem Absatz 80.In the perforated body 55 shown in FIGS. 5a, b, the shoulder 80 is designed as the bottom of a blind hole 98, which starts from the downstream second surface 62. The spray openings 54b run between the first surface 59 and the shoulder 80.

Bei dem in den Figuren 6a, b dargestellten Lochkörper 55 ist ein Sackloch 99 vorgesehen, das von der stromaufwärts gerichteten ersten Fläche 59 ausgeht und dessen Boden den Absatz 80 bildet, zwischen dem und der zweiten Fläche 62 die Abspritzöffnungen 54b verlaufen.In the perforated body 55 shown in FIGS. 6a, b, a blind hole 99 is provided, which starts from the upstream first surface 59 and the bottom of which forms the shoulder 80, between which and the second surface 62 the spray openings 54b run.

Wie in den Figuren 7a, b dargestellt ist, kann der Absatz 80 auch an einer die Flächen 59, 62 überragenden Erhebung 100 ausgebildet sein. Im Gegensatz zu den vorhergehenden Ausführungsbeispielen sind in diesem Falle die zwischen dem Absatz 80 bzw. der dritten Ebene 93 und einer der Flächen 59, 62 verlaufenden Abspritzöffnungen 54b län­ger als die zwischen der ersten Fläche 59 und der zweiten Fläche 62 verlaufenden weiteren Abspritzöffnungen 54a.As shown in FIGS. 7a, b, the shoulder 80 can also be formed on an elevation 100 which projects beyond the surfaces 59, 62. In contrast to the previous exemplary embodiments, in this case the spray openings 54b running between the shoulder 80 or the third plane 93 and one of the surfaces 59, 62 are longer than the further spray openings 54a running between the first surface 59 and the second surface 62.

Bei den beschriebenen Ausführungsbeispielen verlaufen die weiteren Abspritzöffnungen 54a jeweils zwischen der ersten Fläche 59 und der zweiten Fläche 62.In the exemplary embodiments described, the further spray openings 54a each run between the first surface 59 and the second surface 62.

Bei dem in den Figuren 7a, b dargestellten Lochkörper 55 bietet es sich insbesondere an, dieses zweiteilig auszuführen, wobei die die Form einer Plattform aufweisende Erhebung 100 als gesondertes Teil ausgeführt und auf eine der Flächen 59, 62 des Lochkörpers 55 aufge­setzt ist.In the case of the perforated body 55 shown in FIGS. 7a, b, it is particularly appropriate to design it in two parts, the elevation 100 having the shape of a platform being designed as a separate part and being placed on one of the surfaces 59, 62 of the perforated body 55.

Die Herstellung des Lochkörpers kann durch Prägen, Schleifen, Drehen, Elysieren oder ein ähnliches Verfahren vorgenommen werden, die Herstellung der Abspritzöffnungen durch Erodieren, Stanzen oder Bohren (auch Laserbohren, Elektronenstrahl-Bohren). Als Werkstoffe für den Lochkörper kommen verschiedene Arten von Metallen, insbeson­dere Sintermetalle sowie Kunststoffe und Keramikwerkstoffe in Frage. In einer weiteren Ausführungsform der Erfindung kann der Lochkörper 55 auch als Bestandteil des Düsenkörpers 9 ausgebildet sein, bei­spielsweise als Boden im Düsenkörper 9.The perforated body can be produced by embossing, grinding, turning, Elysier or a similar process, the injection orifices by eroding, punching or drilling (also laser drilling, electron beam drilling). Various types of metals, in particular sintered metals as well as plastics and ceramic materials, come into consideration as materials for the perforated body. In a further embodiment of the invention, the perforated body 55 can also be formed as a component of the nozzle body 9, for example as a base in the nozzle body 9.

Durch das Einbringen der Absätze 80 in den Lochkörper 55 tritt eine Veränderung der Länge der in diesem Bereich mündenden Abspritzöff­nungen ein. Da die Länge der Abspritzöffnungen den Druckabfall an ihnen bestimmt (lange Abspritzöffnungen bedingen bei gleichem Durch­messer einen hohen Druckabfall, kurze Abspritzöffnungen einen gerin­gen Druckabfall), läßt sich durch eine zweckmäßig gewählte Lage des Absatzes der Druckabfall an der jeweiligen Abspritzöffnung und damit die durchströmende Kraftstoffmenge bestimmen. Zum Kraftstoffmengen­abgleich bei einem Kraftstoffeinspritzventil kann also entweder die Anzahl der Abspritzöffnungen variiert werden oder aber, auf be­schriebene Weise, die Durchflußmenge jeder Abspritzöffnung.By introducing the shoulders 80 into the perforated body 55, there is a change in the length of the spray openings opening into this area. Since the length of the spray orifices determines the pressure drop across them (long spray orifices require a high pressure drop with the same diameter, short spray orifices a low pressure drop), the pressure drop at the respective spray orifice and thus the fuel flow rate can be determined by an appropriately selected position of the heel. For the fuel quantity adjustment in a fuel injection valve, either the number of spray orifices can be varied or, in the manner described, the flow rate of each spray orifice.

Claims (11)

1. Lochkörper zur Verwendung stromab eines Ventilsitzes eines Kraft­stoffeinspritzventiles für Kraftstoffeinspritzanlagen von Brenn­kraftmaschinen mit einer in einer ersten Ebene liegenden ersten Fläche und einer in einer zweiten Ebene liegenden zweiten Fläche sowie mit mindestens einem in einer dritten Ebene liegenden Absatz, zwischen dem und einer der Flächen sich mindestens eine den Loch­körper durchdringende Abspritzöffnung erstreckt, dadurch gekenn­zeichnet, daß sich mindestens eine weitere Abspritzöffnung (54a) zwischen den beiden Flächen (59, 62) erstreckt und sich die Länge der weiteren Abspritzöffnung (54a) von der Länge der sich zwischen dem Absatz (80) und einer der Flächen (59, 62) erstreckenden Ab­spritzöffnung (54b) unterscheidet.1. perforated body for use downstream of a valve seat of a fuel injection valve for fuel injection systems of internal combustion engines with a first surface lying in a first plane and a second surface lying in a second plane and with at least one shoulder lying in a third plane, between which and one of the surfaces At least one spray opening penetrating the perforated body, characterized in that at least one further spray opening (54a) extends between the two surfaces (59, 62) and the length of the further spray opening (54a) depends on the length between the shoulder (80 ) and one of the surfaces (59, 62) extending spray opening (54b). 2. Lochkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Ab­satz (80) als Boden einer Vertiefung im Lochkörper (55) zwischen der ersten (59) und der zweiten Fläche (62) ausgebildet ist.2. Perforated body according to claim 1, characterized in that the shoulder (80) is designed as the bottom of a recess in the perforated body (55) between the first (59) and the second surface (62). 3. Lochkörper nach Anspruch 2, dadurch gekennzeichnet, daß der Ab­satz (80) als Boden eines Sackloches (98, 99) ausgebildet ist.3. Perforated body according to claim 2, characterized in that the shoulder (80) is designed as the bottom of a blind hole (98, 99). 4. Lochkörper nach Anspruch 2, dadurch gekennzeichnet, daß der Ab­satz (80) als Boden einer Nut (82) ausgebildet ist.4. Perforated body according to claim 2, characterized in that the shoulder (80) is designed as the bottom of a groove (82). 5. Lochkörper nach Anspruch 2, dadurch gekennzeichnet, daß die dritte Ebene (93) unter einem Winkel zur ersten Ebene (91) oder zur zweiten Ebene (92) angeordnet ist.5. Perforated body according to claim 2, characterized in that the third plane (93) is arranged at an angle to the first plane (91) or to the second plane (92). 6. Lochkörper nach Anspruch 5, dadurch gekennzeichnet, daß der in der dritten Ebene (93) liegende Absatz (80) als Boden eines keil­förmigen Einschnittes (95) zwischen erster Ebene (91) und zweiter Ebene (92) ausgebildet ist.6. Perforated body according to claim 5, characterized in that the shoulder (80) lying in the third plane (93) is designed as the bottom of a wedge-shaped incision (95) between the first plane (91) and the second plane (92). 7. Lochkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Ab­satz (80) an einer Erhebung (100) ausgebildet ist.7. perforated body according to claim 1, characterized in that the shoulder (80) is formed on an elevation (100). 8. Lochkörper nach einem der vorhergehenden Ansprüche, dadurch ge­kennzeichnet, daß Mittelachsen (83a, b) verschiedener Abspritzöff­nungen (54a, b) unterschiedlich stark zur Längsachse des Kraftstoff­einspritzventils geneigt verlaufen.8. Perforated body according to one of the preceding claims, characterized in that central axes (83a, b) of different spray openings (54a, b) are inclined at different degrees to the longitudinal axis of the fuel injection valve. 9. Lochkörper nach einem der vorhergehenden Ansprüche, dadurch ge­kennzeichnet, daß der Lochkörper (55) als separates Bauteil ausge­führt ist.9. Perforated body according to one of the preceding claims, characterized in that the perforated body (55) is designed as a separate component. 10. Lochkörper nach Anspruch 9, dadurch gekennzeichnet, daß der Lochkörper (55) die Form eines Plättchens aufweist.10. Perforated body according to claim 9, characterized in that the perforated body (55) has the shape of a plate. 11. Lochkörper nach einem der vorhergehenden Ansprüche, dadurch ge­kennzeichnet, daß der Lochkörper (55) als Bestandteil eines den Ven­tilsitz (48) aufnehmenden Düsenkörpers (9) des Kraftstoffeinspritz­ventiles ausgebildet ist.11. Perforated body according to one of the preceding claims, characterized in that the perforated body (55) is designed as part of a nozzle body (9) of the fuel injection valve receiving the valve seat (48).
EP19880114577 1987-10-05 1988-09-07 Fuel injection valve Expired - Lifetime EP0310819B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3733604 1987-10-05
DE19873733604 DE3733604A1 (en) 1987-10-05 1987-10-05 HOLE BODY FOR A FUEL INJECTION VALVE

Publications (2)

Publication Number Publication Date
EP0310819A1 true EP0310819A1 (en) 1989-04-12
EP0310819B1 EP0310819B1 (en) 1991-09-18

Family

ID=6337635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880114577 Expired - Lifetime EP0310819B1 (en) 1987-10-05 1988-09-07 Fuel injection valve

Country Status (6)

Country Link
US (1) US4890794A (en)
EP (1) EP0310819B1 (en)
JP (1) JP2610961B2 (en)
KR (1) KR960013110B1 (en)
BR (1) BR8805099A (en)
DE (2) DE3733604A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607871B2 (en) * 1986-05-31 1991-03-14 Robert Bosch Gmbh Fuel injection valve
WO1992003652A1 (en) * 1990-08-16 1992-03-05 Robert Bosch Gmbh Method of adjusting a fuel-injection valve, and fuel-injection valve
WO1992003651A1 (en) * 1990-08-16 1992-03-05 Robert Bosch Gmbh Fuel-injection valve
WO1998034026A1 (en) 1997-01-30 1998-08-06 Robert Bosch Gmbh Fuel injection valve
EP1108885A2 (en) * 1999-12-15 2001-06-20 Hitachi, Ltd. Direct injection fuel injector and internal combustion engine mounting the same
DE10142299A1 (en) * 2001-08-29 2003-04-17 Bosch Gmbh Robert fuel injection system
CN104736835A (en) * 2012-10-23 2015-06-24 三菱电机株式会社 Fuel injection valve
WO2019042627A1 (en) * 2017-08-28 2019-03-07 Robert Bosch Gmbh Injection valve assembly

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2619088B2 (en) * 1989-12-28 1997-06-11 株式会社日立製作所 Fuel injection device
JP2518031Y2 (en) * 1990-12-19 1996-11-20 株式会社ユニシアジェックス Fuel injection valve
US5201806A (en) * 1991-06-17 1993-04-13 Siemens Automotive L.P. Tilted fuel injector having a thin disc orifice member
DE4131499C1 (en) * 1991-09-21 1993-04-08 Robert Bosch Gmbh, 7000 Stuttgart, De IC engine fuel injection valve - has ring gap between downstream continuation of sealing and seating surfaces of nozzle
DE4141930B4 (en) * 1991-12-19 2007-02-08 Robert Bosch Gmbh Electromagnetically actuated injection valve
CA2115819C (en) * 1993-02-17 2000-07-25 Yasuhide Tani Fluid injection nozzle
US5532076A (en) * 1993-04-20 1996-07-02 Matsushita Electric Industrial Co., Ltd. Hydrogen storage alloy and electrode therefrom
JP3156554B2 (en) * 1995-07-24 2001-04-16 トヨタ自動車株式会社 Fuel injection valve
DE19527626A1 (en) * 1995-07-28 1997-01-30 Bosch Gmbh Robert Fuel injector
US5765750A (en) * 1996-07-26 1998-06-16 Siemens Automotive Corporation Method and apparatus for controlled atomization in a fuel injector for an internal combustion engine
US6938840B1 (en) * 1998-08-27 2005-09-06 Robert Bosch Gmbh Fuel injection valve
JP4009889B2 (en) * 1999-02-16 2007-11-21 株式会社デンソー Fuel injection valve
DE19931761A1 (en) * 1999-07-08 2001-01-18 Bosch Gmbh Robert Blind hole injection nozzle for internal combustion engines with a rounded transition between blind hole and nozzle needle seat
WO2002016755A1 (en) 2000-08-24 2002-02-28 Mitsubishi Denki Kabushiki Kaisha Solenoid valve for variable discharge fuel supply apparatus
JP2002242796A (en) * 2001-02-14 2002-08-28 Denso Corp Fuel injection nozzle
DE10118163B4 (en) * 2001-04-11 2007-04-19 Robert Bosch Gmbh Fuel injector
DE10122350B4 (en) * 2001-05-09 2006-09-07 Robert Bosch Gmbh fuel injection system
DE10149514A1 (en) * 2001-10-08 2003-04-24 Bosch Gmbh Robert Fuel injector for IC engine fuel injection system, has deformable compensation sleeve for compensation of skew between coupled components
JP3759918B2 (en) * 2002-10-16 2006-03-29 三菱電機株式会社 Fuel injection valve
JP3977728B2 (en) * 2002-11-18 2007-09-19 三菱電機株式会社 Fuel injection valve
DE602004018259D1 (en) * 2004-01-28 2009-01-22 Continental Automotive Italy S Injection valve with deformable needle
DE102005036951A1 (en) * 2005-08-05 2007-02-08 Robert Bosch Gmbh Fuel injection valve and method for forming injection openings
JP4529950B2 (en) * 2005-08-25 2010-08-25 株式会社デンソー Fuel injection valve
US8276836B2 (en) * 2007-07-27 2012-10-02 General Electric Company Fuel nozzle assemblies and methods
JP5185973B2 (en) * 2010-04-16 2013-04-17 三菱電機株式会社 Fuel injection valve
US9822969B2 (en) * 2010-11-30 2017-11-21 General Electric Company Fuel injector having tip cooling
JP5178901B1 (en) * 2011-10-28 2013-04-10 三菱電機株式会社 Fuel injection valve
DE102012209326A1 (en) * 2012-06-01 2013-12-05 Robert Bosch Gmbh Fuel injector
JP5983481B2 (en) * 2013-03-21 2016-08-31 トヨタ自動車株式会社 Fuel injection nozzle
JP2016205197A (en) * 2015-04-21 2016-12-08 日立オートモティブシステムズ株式会社 Fuel injection device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB163799A (en) * 1920-02-24 1921-05-24 Robert Pile Doxford Improvements in or relating to fuel-spraying nozzles for internal-combustion engines
GB2034816A (en) * 1978-11-24 1980-06-11 Maschf Augsburg Nuernberg Ag Multi-aperture injection nozzle for an air compression internal combustion engine
GB2049045A (en) * 1979-05-18 1980-12-17 Bosch Gmbh Robert Fuel injection nozzle for an internal combustion engine
EP0201190A1 (en) * 1985-05-06 1986-11-12 General Motors Corporation Orifice director plate for electromagnetic fuel injector
GB2178483A (en) * 1985-07-31 1987-02-11 Lucas Ind Plc Fuel injector for I.C. engines
US4699323A (en) * 1986-04-24 1987-10-13 General Motors Corporation Dual spray cone electromagnetic fuel injector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3229716C2 (en) * 1982-08-10 1995-01-26 Bosch Gmbh Robert Fuel injector
US4627772A (en) * 1984-08-23 1986-12-09 Newmark, Inc. Carving attachment for table saws

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB163799A (en) * 1920-02-24 1921-05-24 Robert Pile Doxford Improvements in or relating to fuel-spraying nozzles for internal-combustion engines
GB2034816A (en) * 1978-11-24 1980-06-11 Maschf Augsburg Nuernberg Ag Multi-aperture injection nozzle for an air compression internal combustion engine
GB2049045A (en) * 1979-05-18 1980-12-17 Bosch Gmbh Robert Fuel injection nozzle for an internal combustion engine
EP0201190A1 (en) * 1985-05-06 1986-11-12 General Motors Corporation Orifice director plate for electromagnetic fuel injector
GB2178483A (en) * 1985-07-31 1987-02-11 Lucas Ind Plc Fuel injector for I.C. engines
US4699323A (en) * 1986-04-24 1987-10-13 General Motors Corporation Dual spray cone electromagnetic fuel injector

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607871B2 (en) * 1986-05-31 1991-03-14 Robert Bosch Gmbh Fuel injection valve
WO1992003652A1 (en) * 1990-08-16 1992-03-05 Robert Bosch Gmbh Method of adjusting a fuel-injection valve, and fuel-injection valve
WO1992003651A1 (en) * 1990-08-16 1992-03-05 Robert Bosch Gmbh Fuel-injection valve
WO1998034026A1 (en) 1997-01-30 1998-08-06 Robert Bosch Gmbh Fuel injection valve
US6170763B1 (en) 1997-01-30 2001-01-09 Robert Bosch Gmbh Fuel injection valve
EP1108885A2 (en) * 1999-12-15 2001-06-20 Hitachi, Ltd. Direct injection fuel injector and internal combustion engine mounting the same
EP1108885A3 (en) * 1999-12-15 2003-05-14 Hitachi, Ltd. Direct injection fuel injector and internal combustion engine mounting the same
KR100482712B1 (en) * 1999-12-15 2005-04-13 가부시키가이샤 히타치세이사쿠쇼 Direct injection fuel injector and internal combustion engine mounting the same
DE10142299A1 (en) * 2001-08-29 2003-04-17 Bosch Gmbh Robert fuel injection system
CN104736835A (en) * 2012-10-23 2015-06-24 三菱电机株式会社 Fuel injection valve
WO2019042627A1 (en) * 2017-08-28 2019-03-07 Robert Bosch Gmbh Injection valve assembly

Also Published As

Publication number Publication date
DE3733604A1 (en) 1989-04-13
JPH01116280A (en) 1989-05-09
JP2610961B2 (en) 1997-05-14
KR960013110B1 (en) 1996-09-30
DE3864967D1 (en) 1991-10-24
BR8805099A (en) 1989-05-16
EP0310819B1 (en) 1991-09-18
US4890794A (en) 1990-01-02
KR890006972A (en) 1989-06-17

Similar Documents

Publication Publication Date Title
EP0310819B1 (en) Fuel injection valve
EP0310607B1 (en) Fuel injection valve
DE19726833B4 (en) Fuel injection valve
DE69806509T2 (en) FLAT NEEDLE FOR A PRESSURIZED SWIRL INJECTION VALVE
EP1339975B1 (en) Fuel injection valve
DE10049518B4 (en) Fuel injector
DE4105643C2 (en) Fuel injector and process for its manufacture
DE19937961A1 (en) Fuel injection valve and method for producing outlet openings on valves
DE10323398A1 (en) Fuel injection valve
DE4109868A1 (en) ADJUSTING SOCKET FOR AN ELECTROMAGNETICALLY ACTUABLE VALVE AND METHOD FOR THE PRODUCTION THEREOF
DE3723698A1 (en) FUEL INJECTION VALVE AND METHOD FOR ITS ADJUSTMENT
EP0717816B1 (en) Electromagnetically actuated valve
DE112004000897B4 (en) Fuel injection valve with a nozzle disk and method for producing the nozzle disk with an asymmetric mandrel
DE102006051327A1 (en) Fuel injector
DE19636396A1 (en) Fuel injector valve for IC engine
DE3710467C2 (en) Fuel injector
DE8632002U1 (en) Fuel injection valve
DE4408875A1 (en) Fuel injection valve for IC engine
DE19748652B4 (en) Fuel injection valve
DE4131499C1 (en) IC engine fuel injection valve - has ring gap between downstream continuation of sealing and seating surfaces of nozzle
WO2000012892A1 (en) Fuel injection valve
DE10123859B4 (en) Fuel injector
DE10055513B4 (en) Fuel injector
DE10061571A1 (en) Fuel injector
DE10050055A1 (en) Fuel injection valve for internal combustion engine has threaded rod as spiral forming element

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19890828

17Q First examination report despatched

Effective date: 19900328

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3864967

Country of ref document: DE

Date of ref document: 19911024

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed
RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ROBERT BOSCH GMBH

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

Ref country code: GB

Payment date: 19980825

Year of fee payment: 11

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

Ref country code: FR

Payment date: 19980925

Year of fee payment: 11

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

Ref country code: GB

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

Effective date: 19990907

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990907

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: 20000531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: DE

Payment date: 20011128

Year of fee payment: 14

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: 20030401

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050907