EP1702156B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

Info

Publication number
EP1702156B1
EP1702156B1 EP04817563A EP04817563A EP1702156B1 EP 1702156 B1 EP1702156 B1 EP 1702156B1 EP 04817563 A EP04817563 A EP 04817563A EP 04817563 A EP04817563 A EP 04817563A EP 1702156 B1 EP1702156 B1 EP 1702156B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve
section
ejection opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP04817563A
Other languages
German (de)
French (fr)
Other versions
EP1702156A1 (en
Inventor
Volker Holzgrefe
Stefan Arndt
Gernot Wuerfel
Manfred Stuerz
Axel Storch
Guido Pilgram
Juergen Raimann
Detlef Nowak
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 EP1702156A1 publication Critical patent/EP1702156A1/en
Application granted granted Critical
Publication of EP1702156B1 publication Critical patent/EP1702156B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of 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
    • F02M51/061—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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • a fuel injection valve is known in which the injection opening opens at a surrounding the ejection opening flat surface.
  • the injection opening opens out at an outer surface of a circular cone tapering in cross-section, wherein the outer surfaces running above and below the injection opening have an angle of 180 ° to one another.
  • a disadvantage of the fuel injection valves known from the prior art is in particular that by the flat, not protruding arrangement of the injection orifice in a flat surface or between two mutually in cross-section in a line extending surfaces, one for the prevention of precipitation of fuel sufficient gas flow can not be achieved. The formation of combustion residues in and around the Spray opening is thereby increased. The combustion process can not be controlled optimally over the life of the fuel injection valve. Consumption and pollutant development are increased.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the strength of the gas movements is sufficient by the exposed position of the exit point of the injection orifice to keep the environment of the exit point free of deposits that would affect the injection unfavorable.
  • the injection opening opens in
  • the fuel injection valve can be produced by simple and inexpensive process steps.
  • the spray opening widens conically outward.
  • a fuel flow detached from the wall of the injection orifice at the entrance of the injection orifice is thereby reliably maintained in the injection orifice.
  • the injection orifice can be formed longer without disadvantages, whereby the stability of the discharge-side end of the fuel injection valve is increased.
  • the second section is also advantageous to form the second section by a circumferential groove. Hierduch the second section can be easily and inexpensively generated, especially in fuel injection valves with multiple spray orifices.
  • FIGS. 2 to 6 Before using the FIGS. 2 to 6 preferred embodiments of the invention will be described in more detail, is intended to better understanding of the invention initially based on Fig. 1 a generic fuel injection valve will be briefly explained with respect to its essential components.
  • FIG. 1 illustrated first embodiment of a generic fuel injector 1 is executed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is particularly suitable for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine with spray-guided combustion process.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 has the discharge side a valve closing body 4 which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated by a distance 26 and connected to each other by a non-ferromagnetic connecting member 29.
  • the magnetic coil 10 is energized via an electrical line 19 from a via an electrical plug contact 17 can be supplied electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the shim 15 is the armature 20. This is connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21.
  • a helical return spring 23 On the first flange 21, a helical return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • valve needle guide 14 in the armature 20 and on a guide element 36 extend fuel channels 30, 31 and 32.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is through a rubber ring 28th sealed against a fuel distributor line, not shown, and by a seal 37 against a cylinder head, not shown.
  • annular damping element 33 On the discharge side of the armature 20, an annular damping element 33, which consists of an elastomer material, arranged. It rests on a second flange 34, which is materially connected to the valve needle 3 via a weld seam 35.
  • the armature 20 In the resting state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat surface 6 in sealing engagement. Upon energization of the solenoid coil 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke is determined by a located in the rest position between the inner pole 12 and the armature 20 working gap 27.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, also in the stroke direction with.
  • the standing with the valve needle 3 in connection valve closing body 4 lifts from the valve seat surface 6, and the pressurized supplied fuel is sprayed through the injection opening 7 in the combustion chamber, not shown.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • the fuel injection valve 1 has a central axis 47, to which in this embodiment in particular the valve needle 3, the valve closing body 4 and the nozzle body 2 are arranged coaxially.
  • Fig. 2 shows a first embodiment of a fuel injection valve according to the invention 1.
  • the nozzle body 2 of the in this embodiment, inwardly opening fuel injector 1 is formed integrally with the valve seat body 5.
  • the injection-molding opening 7 produced, for example, by drilling or laser drilling, runs straight at an angle of, for example, 30 ° to the central axis 47 in the valve seat body 5, wherein it has a constant diameter over its course.
  • the valve seat body 5 is formed on the outside of a circular cone and has at least one circumferential first surface 39 and a circumferential second surface 40, 47 occupy different angles to the central axis.
  • the ejection opening 7 opens at the transition of the first surface 39 to the second surface 40 at an exit point 46 from the valve seat body 5.
  • the first surface 39 has to the second surface 40 extending outside the valve seat body 5 outer angle 41 of more than 180 °, for example, 210 °.
  • Fig. 3 shows a schematic section through a second embodiment of the fuel injection valve 1 according to the invention in the region of the injection opening 7, similar to the first embodiment Fig. 2 , In contrast to the first embodiment, the diameter of the injection opening 7 expands conically in Abspritzraum.
  • Fig. 4 shows a schematic section through a third embodiment of the fuel injection valve 1 according to the invention in the region of the injection opening 7, similar to the first embodiment Fig. 2 , in the In contrast to the first exemplary embodiment, the diameter of the spray-discharge opening 7 expands through a step 42 in the direction of discharge.
  • the step 42 divides the course of the injection opening 7 into an upstream first section 44 and a second section 45 located in the direction of discharge.
  • the second section 45 is for example cylindrical and produced by drilling, wherein in this embodiment, the two sections 44, 45 are arranged coaxially with each other.
  • the second section 45 may also be formed by a circumferential groove 43, which in Fig.
  • Fig. 5 shows a schematic representation of a fourth embodiment of the fuel injection valve 1 according to the invention in the region of the injection opening 7, similar to the third embodiment Fig. 4 ,
  • the valve seat body 5 a plurality of ejection openings 7.
  • the second section 45 or the step 42 is formed by the valve seat body 5 at the level of the ejection openings 7 radially circumferential groove 43.
  • the two spray-discharge openings 7 shown each have a first section 44 with different diameters. The diameter can be at most as large as the height of the groove 43 or smaller.
  • Fig. 6 shows a fifth embodiment of a fuel injection valve according to the invention 1.
  • the nozzle body 2 of the fuel injection valve 1 which opens outward in this embodiment is formed integrally with the valve seat body 5.
  • the second surface 40 is arranged on the outside of the valve closing body 4.
  • the spray opening 7, wherein the spray opening 7 is widened conically downstream of the sealing seat and the spray opening 7 assumes the shape of a circumferential annular gap in the open state.

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

Disclosed is a fuel injection valve (1) comprising an actuator which is effectively connected to a valve needle (3). The discharge end of said valve needle (3) is provided with a valve-closing member (4) which cooperates with a valve seat surface (6) so as to form a sealing seat. A discharge port (7) ends at an outlet point (46). Said outlet point (46) of the discharge port (7) protrudes relative to all sides of the surface which surrounds the outlet point (46) and from which the same extends.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention relates to a fuel injection valve according to the preamble of the main claim.

Beispielsweise ist aus der DE 199 50 760 A1 ein Brennstoffeinspritzventil bekannt, bei dem die Abspritzöffnung an einer die Abspritzöffnung umgebenden ebenen Fläche ausmündet.For example, is from the DE 199 50 760 A1 a fuel injection valve is known in which the injection opening opens at a surrounding the ejection opening flat surface.

In anderen ebenfalls aus dem Stand der Technik bekannten Brennstoffeinspritzventilen mündet die Abspritzöffnung an einer im Querschnitt konisch zulaufenden Außenfläche eines Kreiskegels aus, wobei die oberhalb und unterhalb der Abspritzöffnung verlaufenden Außenflächen einen Winkel von 180° zueinander aufweisen.In other fuel injection valves also known from the prior art, the injection opening opens out at an outer surface of a circular cone tapering in cross-section, wherein the outer surfaces running above and below the injection opening have an angle of 180 ° to one another.

EP 1208298 offenbaant den Oberbergriff des Anspruchs 1. EP 1208298 offenbaant the Oberbergriff of claim 1.

Nachteilig bei den aus dem Stand der Technik bekannten Brennstoffeinspritzventilen ist insbesondere, daß durch die flache, nicht hervorstehende Anordnung der Abspritzöffnung in einer ebenen Fläche bzw. zwischen zwei zueinander in im Querschnitt zueinander in einer Linie verlaufenden Flächen, eine für die Verhinderung von Niederschlag von Brennstoff ausreichende Gasströmung nicht erzielt werden kann. Die Bildung von Verbrennungsrückständen in und um die Abspritzöffnung ist dadurch erhöht. Der Verbrennungsablauf kann dadurch nicht optimal über die Lebensdauer des Brennstoffeinspritzventils gesteuert werden. Der Verbrauch und die Schadstoffentwicklung sind erhöht.A disadvantage of the fuel injection valves known from the prior art is in particular that by the flat, not protruding arrangement of the injection orifice in a flat surface or between two mutually in cross-section in a line extending surfaces, one for the prevention of precipitation of fuel sufficient gas flow can not be achieved. The formation of combustion residues in and around the Spray opening is thereby increased. The combustion process can not be controlled optimally over the life of the fuel injection valve. Consumption and pollutant development are increased.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß durch die exponierte Lage der Austrittsstelle der Abspritzöffnung die Stärke der Gasbewegungen ausreicht, um die Umgebung der Austrittsstelle frei von Ablagerungen zu halten, die den Einspritzvorgang unvorteilhaft beeinflussen würden.The fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the strength of the gas movements is sufficient by the exposed position of the exit point of the injection orifice to keep the environment of the exit point free of deposits that would affect the injection unfavorable.

Die Abspritzöffnung mündet imThe injection opening opens in

Bereich des Übergangs einer ersten Fläche in eine zweite Fläche aus, wobei die beiden Flächen zueinander mit einem Außenwinkel von mehr als 180° angeordnet sind. Durch die dadurch erzeugten kegelförmigen Abschnitte kann das Brennstoffeinspritzventil durch einfache und kostengünstige Verfahrensschritte hergestellt werden.Area of the transition of a first surface in a second surface, wherein the two surfaces are arranged to each other with an outer angle of more than 180 °. By the conical sections produced thereby, the fuel injection valve can be produced by simple and inexpensive process steps.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.The measures listed in the dependent claims advantageous refinements of the fuel injection valve specified in the main claim are possible.

Vorteilhafterweise erweitert sich die Abspritzöffnung konisch nach außen. Eine am Eingang der Abspritzöffnung von der Wandung der Abspritzöffnung abgelöste Brennstoffströmung wird dadurch in der Abspritzöffnung sicher aufrecht erhalten. Die beispielsweise in Form einer Wirbelzone oder Kavitationsblase gebildete, von den Wandungen abgelöste Brennstoffströmung, verhindert eine Benetzung der Wandungen der Abspritzöffnung mit Brennstoff und bewirkt durch hydrodynamische Querkräfte eine Selbstreinigung der Abspritzöffnung beim Einspritzvorgang. Da diese abgelöste Strömung über die ganze Länge der Abspritzöffnung aufrechterhalten wird, können sich in der Abspritzöffnung keine Ablagerungen bilden. Außerdem kann die Abspritzöffnung ohne Nachteile länger ausgebildet werden, wodurch die Stabilität des abspritzseitigen Endes des Brennstoffeinspritzventils erhöht ist. Dies wird auch durch eine gestufte, nach außen aufweitende Gestaltung der Abspritzöffnungen erreicht, wobei darüber hinaus vorteilhafterweise noch ein direkter Flammenzutritt in den durchflußbestimmenden innen liegenden Abschnitt kleineren Durchmessers verhindert wird, wenn der erste Abschnitt zumindest teilweise durch den zweiten Abschnitt gegenüber dem Brennraum bzw. der sich im Brennraum entstehenden und ausbreitenden Flammenfront verdeckt ist.Advantageously, the spray opening widens conically outward. A fuel flow detached from the wall of the injection orifice at the entrance of the injection orifice is thereby reliably maintained in the injection orifice. The formed for example in the form of a vortex zone or Kavitationsblase, detached from the walls of fuel flow, prevents wetting of the walls of the injection orifice with fuel and causes by hydrodynamic shear forces a self-cleaning of the injection opening during the injection process. Since this detached flow is maintained over the entire length of the injection orifice, can in the injection orifice do not form deposits. In addition, the injection orifice can be formed longer without disadvantages, whereby the stability of the discharge-side end of the fuel injection valve is increased. This is also achieved by a stepped, outwardly widening design of the ejection openings, wherein advantageously still a direct flame access is prevented in the flow-determining inner portion of smaller diameter, if the first portion at least partially through the second portion relative to the combustion chamber or the is hidden in the combustion chamber and spreading flame front is covered.

Von Vorteil ist es außerdem, den zweiten Abschnitt durch eine umlaufende Nut auszubilden. Hierduch kann der zweite Abschnitt einfach und kostengünstig erzeugt werden, insbesondere bei Brennstoffeinspritzventilen mit mehreren Abspritzöffnungen.It is also advantageous to form the second section by a circumferential groove. Hierduch the second section can be easily and inexpensively generated, especially in fuel injection valves with multiple spray orifices.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
einen schematischen Schnitt durch ein Beispiel eines gattungsgemäß ausgestalteten Brennstoffeinspritzventils,
Fig. 2
einen schematischen Schnitt durch ein erstes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Abspritzöffnung,
Fig. 3
einen schematischen Schnitt durch ein zweites Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Abspritzöffnung,
Fig. 4
einen schematischen Schnitt durch ein drittes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Abspritzöffnung,
Fig. 5
eine schematische Darstellung eines vierten Ausführungsbeispiels eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Abspritzöffnung und
Fig. 6
einen schematischen Schnitt durch ein fünftes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich der Abspritzöffnung.
Embodiments of the invention are shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1
a schematic section through an example of a generic designed fuel injector,
Fig. 2
FIG. 2 a schematic section through a first exemplary embodiment of a fuel injection valve according to the invention in the region of the injection opening, FIG.
Fig. 3
FIG. 2 a schematic section through a second exemplary embodiment of a fuel injection valve according to the invention in the region of the injection opening, FIG.
Fig. 4
FIG. 2 a schematic section through a third exemplary embodiment of a fuel injection valve according to the invention in the region of the injection opening, FIG.
Fig. 5
a schematic representation of a fourth embodiment of a fuel injection valve according to the invention in the region of the injection opening and
Fig. 6
a schematic section through a fifth embodiment of a fuel injection valve according to the invention in the region of the injection opening.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Nachfolgend werden Ausführungsbeispiele der Erfindung beispielhaft beschrieben. Übereinstimmende Bauteile sind dabei mit übereinstimmenden Bezugszeichen versehen.Hereinafter, embodiments of the invention will be described by way of example. Matching components are provided with matching reference numerals.

Bevor anhand der Figuren 2 bis 6 bevorzugte erfindungsgemäße Ausführungsbeispiele der Erfindung näher beschrieben werden, soll zum besseren Verständnis der Erfindung zunächst anhand von Fig. 1 ein gattungsgemäßes Brennstoffeinspritzventil bezüglich seiner wesentlichen Bauteile kurz erläutert werden.Before using the FIGS. 2 to 6 preferred embodiments of the invention will be described in more detail, is intended to better understanding of the invention initially based on Fig. 1 a generic fuel injection valve will be briefly explained with respect to its essential components.

Ein in Fig. 1 dargestelltes erstes Ausführungsbeispiel eines gattungsgemäßen Brennstoffeinspritzventils 1 ist in der Form eines Brennstoffeinspritzventils 1 für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen ausgeführt. Das Brennstoffeinspritzventil 1 eignet sich insbesondere zum direkten Einspritzen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraftmaschine mit strahlgeführtem Brennverfahren.An in Fig. 1 illustrated first embodiment of a generic fuel injector 1 is executed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines. The fuel injection valve 1 is particularly suitable for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine with spray-guided combustion process.

Das Brennstoffeinspritzventil 1 besteht aus einem Düsenkörper 2, in welchem eine Ventilnadel 3 angeordnet ist. Die Ventilnadel 3 weist abspritzseitig einen Ventilschließkörper 4 auf, der mit einer auf einem Ventilsitzkörper 5 angeordneten Ventilsitzfläche 6 zu einem Dichtsitz zusammenwirkt. Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, welches über eine Abspritzöffnung 7 verfügt. Der Düsenkörper 2 ist durch eine Dichtung 8 gegen einen Außenpol 9 einer Magnetspule 10 abgedichtet. Die Magnetspule 10 ist in einem Spulengehäuse 11 gekapselt und auf einen Spulenträger 12 gewickelt, welcher an einem Innenpol 13 der Magnetspule 10 anliegt. Der Innenpol 13 und der Außenpol 9 sind durch einen Abstand 26 voneinander getrennt und miteinander durch ein nicht ferromagnetisches Verbindungsbauteil 29 verbunden. Die Magnetspule 10 wird über eine elektrische Leitung 19 von einem über einen elektrischen Steckkontakt 17 zuführbaren elektrischen Strom erregt. Der Steckkontakt 17 ist von einer Kunststoffummantelung 18 umgeben, die am Innenpol 13 angespritzt sein kann.The fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 has the discharge side a valve closing body 4 which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat. The fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7. The nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10. The magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10. The inner pole 13 and the outer pole 9 are separated by a distance 26 and connected to each other by a non-ferromagnetic connecting member 29. The magnetic coil 10 is energized via an electrical line 19 from a via an electrical plug contact 17 can be supplied electric current. The plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.

Die Ventilnadel 3 ist in einer Ventilnadelführung 14 geführt, welche scheibenförmig ausgeführt ist. Zur Hubeinstellung dient eine zugepaarte Einstellscheibe 15. An der anderen Seite der Einstellscheibe 15 befindet sich der Anker 20. Dieser steht über einen ersten Flansch 21 mit der Ventilnadel 3 in Verbindung, welche durch eine Schweißnaht 22 mit dem ersten Flansch 21 verbunden ist. Auf dem ersten Flansch 21 stützt sich eine spiralförmige Rückstellfeder 23 ab, welche in der vorliegenden Bauform des Brennstoffeinspritzventils 1 durch eine Hülse 24 auf Vorspannung gebracht wird.The valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped. On the other side of the shim 15 is the armature 20. This is connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21. On the first flange 21, a helical return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.

In der Ventilnadelführung 14, im Anker 20 und an einem Führungselement 36 verlaufen Brennstoffkanäle 30, 31 und 32. Der Brennstoff wird über eine zentrale Brennstoffzufuhr 16 zugeführt und durch ein Filterelement 25 gefiltert. Das Brennstoffeinspritzventil 1 ist durch einen Gummiring 28 gegen eine nicht weiter dargestellte Brennstoffverteilerleitung und durch eine Dichtung 37 gegen einen nicht weiter dargestellten Zylinderkopf abgedichtet.In the valve needle guide 14, in the armature 20 and on a guide element 36 extend fuel channels 30, 31 and 32. The fuel is supplied via a central fuel supply 16 and filtered by a filter element 25. The fuel injection valve 1 is through a rubber ring 28th sealed against a fuel distributor line, not shown, and by a seal 37 against a cylinder head, not shown.

An der abspritzseitigen Seite des Ankers 20 ist ein ringförmiges Dämpfungselement 33, welches aus einem Elastomerwerkstoff besteht, angeordnet. Es liegt auf einem zweiten Flansch 34 auf, welcher über eine Schweißnaht 35 stoffschlüssig mit der Ventilnadel 3 verbunden ist.On the discharge side of the armature 20, an annular damping element 33, which consists of an elastomer material, arranged. It rests on a second flange 34, which is materially connected to the valve needle 3 via a weld seam 35.

Im Ruhezustand des Brennstoffeinspritzventils 1 wird der Anker 20 von der Rückstellfeder 23 entgegen seiner Hubrichtung so beaufschlagt, daß der Ventilschließkörper 4 an der Ventilsitzfläche 6 in dichtender Anlage gehalten wird. Bei Erregung der Magnetspule 10 baut diese ein Magnetfeld auf, welches den Anker 20 entgegen der Federkraft der Rückstellfeder 23 in Hubrichtung bewegt, wobei der Hub durch einen in der Ruhestellung zwischen dem Innenpol 12 und dem Anker 20 befindlichen Arbeitsspalt 27 vorgegeben ist. Der Anker 20 nimmt den ersten Flansch 21, welcher mit der Ventilnadel 3 verschweißt ist, ebenfalls in Hubrichtung mit. Der mit der Ventilnadel 3 in Verbindung stehende Ventilschließkörper 4 hebt von der Ventilsitzfläche 6 ab, und der druckbehaftet zugeführte Brennstoff wird durch die Abspritzöffnung 7 in den nicht dargestellten Brennraum abgespritzt.In the resting state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat surface 6 in sealing engagement. Upon energization of the solenoid coil 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke is determined by a located in the rest position between the inner pole 12 and the armature 20 working gap 27. The armature 20 takes the first flange 21, which is welded to the valve needle 3, also in the stroke direction with. The standing with the valve needle 3 in connection valve closing body 4 lifts from the valve seat surface 6, and the pressurized supplied fuel is sprayed through the injection opening 7 in the combustion chamber, not shown.

Wird der Spulenstrom abgeschaltet, fällt der Anker 20 nach genügendem Abbau des Magnetfeldes durch den Druck der Rückstellfeder 23 vom Innenpol 13 ab, wodurch sich der mit der Ventilnadel 3 in Verbindung stehende erste Flansch 21 entgegen der Hubrichtung bewegt. Die Ventilnadel 3 wird dadurch in die gleiche Richtung bewegt, wodurch der Ventilschließkörper 4 auf der Ventilsitzfläche 6 aufsetzt und das Brennstoffeinspritzventil 1 geschlossen wird.If the coil current is turned off, the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction. The valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.

Das Brennstoffeinspritzventil 1 weist eine Mittelachse 47 auf, zu welcher in diesem Ausführungsbeispiel insbesondere die Ventilnadel 3, der Ventilschließkörper 4 und der Düsenkörper 2 koaxial angeordnet sind.The fuel injection valve 1 has a central axis 47, to which in this embodiment in particular the valve needle 3, the valve closing body 4 and the nozzle body 2 are arranged coaxially.

Fig. 2 zeigt ein erstes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils 1. Der Düsenkörper 2 des in diesem Ausführungsbeispiel nach innen öffnenden Brennstoffeinspritzventils 1 ist einstückig mit dem Ventilsitzkörper 5 ausgebildet. Die beispielsweise durch Bohren oder Laserbohren hergestellte Abspritzöffnung 7 verläuft gerade mit einem Winkel von beispielsweise 30° zur Mittelachse 47 im Ventilsitzkörper 5, wobei sie im Verlauf einen gleichbleibenden Durchmesser aufweist. Fig. 2 shows a first embodiment of a fuel injection valve according to the invention 1. The nozzle body 2 of the in this embodiment, inwardly opening fuel injector 1 is formed integrally with the valve seat body 5. The injection-molding opening 7 produced, for example, by drilling or laser drilling, runs straight at an angle of, for example, 30 ° to the central axis 47 in the valve seat body 5, wherein it has a constant diameter over its course.

Der Ventilsitzkörper 5 ist außen kreiskegelförmig ausgebildet und weist zumindest eine umlaufende erste Fläche 39 und eine umlaufende zweite Fläche 40 auf, die zur Mittelachse 47 unterschiedliche Winkel einnehmen. Die Abspritzöffnung 7 mündet am Übergang der ersten Fläche 39 zur zweiten Fläche 40 an einer Austrittsstelle 46 aus dem Ventilsitzkörper 5 aus. Die erste Fläche 39 weist zur zweiten Fläche 40 einen außerhalb des Ventilsitzkörpers 5 verlaufenden Außenwinkel 41 von mehr als 180° auf, beispielsweise 210°. Dadurch steht die Austrittsstelle 46 und der unmittelbare Bereich um die Austrittsstelle 46 relativ zu allen sie umgebenden Außenflächen des Ventilsitzkörpers 5 hervor.The valve seat body 5 is formed on the outside of a circular cone and has at least one circumferential first surface 39 and a circumferential second surface 40, 47 occupy different angles to the central axis. The ejection opening 7 opens at the transition of the first surface 39 to the second surface 40 at an exit point 46 from the valve seat body 5. The first surface 39 has to the second surface 40 extending outside the valve seat body 5 outer angle 41 of more than 180 °, for example, 210 °. As a result, the exit point 46 and the immediate area around the exit point 46 project relative to all the outer surfaces of the valve seat body 5 surrounding it.

Fig. 3 zeigt einen schematischen Schnitt durch ein zweites Ausführungsbeispiel des erfindungsgemäßen Brennstoffeinspritzventils 1 im Bereich der Abspritzöffnung 7, ähnlich dem ersten Ausführungsbeispiel aus Fig. 2. Im Unterschied zum ersten Ausführungsbeispiel erweitert sich der Durchmesser der Abspritzöffnung 7 konisch in Abspritzrichtung. Fig. 3 shows a schematic section through a second embodiment of the fuel injection valve 1 according to the invention in the region of the injection opening 7, similar to the first embodiment Fig. 2 , In contrast to the first embodiment, the diameter of the injection opening 7 expands conically in Abspritzrichtung.

Fig. 4 zeigt einen schematischen Schnitt durch ein drittes Ausführungsbeispiel des erfindungsgemäßen Brennstoffeinspritzventils 1 im Bereich der Abspritzöffnung 7, ähnlich dem ersten Ausführungsbeispiel aus Fig. 2. Im Unterschied zum ersten Ausführungsbeispiel erweitert sich der Durchmesser der Abspritzöffnung 7 durch eine Stufe 42 in Abspritzrichtung. Durch die Stufe 42 wird in diesem Ausführungsbeispiel der Verlauf der Abspritzöffnung 7 in einen stromaufwärts liegenden ersten Abschnitt 44 und einen davon in Abspritzrichtung liegenden zweiten Abschnitt 45 geteilt. Der zweite Abschnitt 45 ist beispielsweise zylinderförmig und durch Bohren hergestellt, wobei in diesem Ausführungsbeispiel die beiden Abschnitte 44, 45 koaxial zueinander angeordnet sind. Der zweite Abschnitt 45 kann auch durch eine umlaufende Nut 43, welche in Fig. 5 näher dargestellt ist, realisiert werden, wobei dann die Querschnitte der beiden Abschnitte 44, 45, wie in Fig. 4 gezeigt, ebenfalls koaxial zueinander angeordnet sind. Durch eine am unteren Ende an der Austrittsstelle 46 bzw. am abspritzseitigen Ende des zweiten Abschnitts 45 ausgebildeten Kante 38, ist der erste Abschnitt 44 gegenüber dem Brennraum bzw. der sich im Brennraum zur Abspritzöffnung 7 hin bewegenden Flammenfront verdeckt. Fig. 4 shows a schematic section through a third embodiment of the fuel injection valve 1 according to the invention in the region of the injection opening 7, similar to the first embodiment Fig. 2 , in the In contrast to the first exemplary embodiment, the diameter of the spray-discharge opening 7 expands through a step 42 in the direction of discharge. In this embodiment, the step 42 divides the course of the injection opening 7 into an upstream first section 44 and a second section 45 located in the direction of discharge. The second section 45 is for example cylindrical and produced by drilling, wherein in this embodiment, the two sections 44, 45 are arranged coaxially with each other. The second section 45 may also be formed by a circumferential groove 43, which in Fig. 5 is shown in more detail, are realized, in which case the cross sections of the two sections 44, 45, as in Fig. 4 shown are also arranged coaxially with each other. By an edge 38 formed at the lower end at the exit point 46 or at the ejection-side end of the second section 45, the first section 44 is covered with respect to the combustion chamber or the flame front moving in the combustion chamber toward the ejection opening 7.

Fig. 5 zeigt eine schematische Darstellung eines vierten Ausführungsbeispiels des erfindungsgemäßen Brennstoffeinspritzventils 1 im Bereich der Abspritzöffnung 7, ähnlich dem dritten Ausführungsbeispiel aus Fig. 4. Im Unterschied zum dritten Ausführungsbeispiel weist der Ventilsitzkörper 5 mehrere Abspritzöffnungen 7 auf. Außerdem ist der zweite Abschnitt 45 bzw. die Stufe 42 durch die den Ventilsitzkörper 5 auf Höhe der Abspritzöffnungen 7 radial umlaufende Nut 43 ausgebildet. Die zwei dargestellten Abspritzöffnungen 7 weisen jeweils einen ersten Abschnitt 44 mit unterschiedlichen Durchmessern auf. Der Durchmesser kann maximal so groß sein wie die Höhe der Nut 43 oder kleiner. Fig. 5 shows a schematic representation of a fourth embodiment of the fuel injection valve 1 according to the invention in the region of the injection opening 7, similar to the third embodiment Fig. 4 , In contrast to the third embodiment, the valve seat body 5 a plurality of ejection openings 7. In addition, the second section 45 or the step 42 is formed by the valve seat body 5 at the level of the ejection openings 7 radially circumferential groove 43. The two spray-discharge openings 7 shown each have a first section 44 with different diameters. The diameter can be at most as large as the height of the groove 43 or smaller.

Fig. 6 zeigt ein fünftes Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils 1. Der Düsenkörper 2 des in diesem Ausführungsbeispiel nach außen öffnenden Brennstoffeinspritzventils 1 ist einstückig mit dem Ventilsitzkörper 5 ausgebildet. Die zweite Fläche 40 ist außen am Ventilschließkörper 4 angeordnet. Der Ventilschließkörper 4 begrenzt mit dem Ventilsitzkörper 5 die Abspritzöffnung 7, wobei die Abspritzöffnung 7 sich stromabwärts des Dichtsitzes konisch erweitert und die Abspritzöffnung 7 im geöffneten Zustand die Form eines umlaufenden Ringspalts annimmt. Fig. 6 shows a fifth embodiment of a fuel injection valve according to the invention 1. The nozzle body 2 of the fuel injection valve 1 which opens outward in this embodiment is formed integrally with the valve seat body 5. The second surface 40 is arranged on the outside of the valve closing body 4. Of the Valve closing body 4 is limited with the valve seat body 5, the spray opening 7, wherein the spray opening 7 is widened conically downstream of the sealing seat and the spray opening 7 assumes the shape of a circumferential annular gap in the open state.

Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt.The invention is not limited to the illustrated embodiments.

Claims (5)

  1. Fuel injection valve (1), in particular for directly injecting fuel into a combustion chamber, having an actuator, having a valve closing body (4) which can be actuated by the actuator and which interacts with a valve seat surface (6) to form a sealing seat, and having at least one ejection opening (7) which opens out at an outlet point (46), with the outlet point (46) of the ejection opening (7) protruding relative to all sides of the surface which directly surrounds it and out of which it opens,
    characterized
    in that the ejection opening (7) is formed in a valve seat body (5) which at the outside is in the shape of a circular cone, and the ejection opening (7) opens out in the region of the transition of a first surface (39) into a second surface (40) of the circular cone, with the two conical surfaces (39, 40) being arranged with an exterior angle (41) relative to one another of greater than 180°.
  2. Fuel injection valve according to Claim 1,
    characterized
    in that the ejection opening (7) widens conically in the outward direction.
  3. Fuel injection valve according to one of the preceding claims,
    characterized
    in that the ejection opening (7) widens in the outward direction in a stepped manner by means of at least one step (42) and, here, has at least one inner, first section (44) and one outer, second section (45).
  4. Fuel injection valve according to Claim 3,
    characterized
    in that the first section (44) is at least partially hidden from the combustion chamber, or from the flame front propagating in the combustion chamber, by the second section (45).
  5. Fuel injection valve according to Claim 3 or 4,
    characterized
    in that the two sections (44, 45) are arranged coaxially with respect to one another.
EP04817563A 2003-12-29 2004-11-19 Fuel injection valve Expired - Fee Related EP1702156B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003161762 DE10361762A1 (en) 2003-12-29 2003-12-29 Fuel injector
PCT/EP2004/053024 WO2005064150A1 (en) 2003-12-29 2004-11-19 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP1702156A1 EP1702156A1 (en) 2006-09-20
EP1702156B1 true EP1702156B1 (en) 2011-02-02

Family

ID=34706698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04817563A Expired - Fee Related EP1702156B1 (en) 2003-12-29 2004-11-19 Fuel injection valve

Country Status (3)

Country Link
EP (1) EP1702156B1 (en)
DE (2) DE10361762A1 (en)
WO (1) WO2005064150A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906317A3 (en) * 2006-09-25 2008-03-28 Renault Sas Fuel injector for e.g. direct injection diesel internal combustion engine, has orifice whose outlet is edged on side by protrusion with lateral surface that is adjacent to orifice and forms acute angle with axis of orifice
DE102011077268A1 (en) * 2011-06-09 2012-12-13 Robert Bosch Gmbh Injection valve for internal combustion engines
DE102013220836A1 (en) * 2013-10-15 2015-04-16 Robert Bosch Gmbh Injector
DE102019220187A1 (en) * 2019-12-19 2021-06-24 Vitesco Technologies GmbH Fuel injector for an internal combustion engine, as well as internal combustion engine with fuel injector

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB265299A (en) * 1925-11-06 1927-02-07 F A Hughes & Company Ltd Improvements in or relating to cocks and valves
FR987394A (en) * 1948-06-04 1951-08-13 Aktiesellskabet Burmeister & W Fuel injection valve for internal combustion engines
GB1088666A (en) * 1964-03-09 1967-10-25 Lister & Co Ltd R A Improvements in or relating to fuel injectors for internal combustion engines
US3612407A (en) * 1968-09-20 1971-10-12 Komatsu Mfg Co Ltd Multiorifice-type airless injection nozzle
DE2557772A1 (en) * 1975-12-20 1977-06-23 Kloeckner Humboldt Deutz Ag FUEL INJECTION VALVE
DE2837606A1 (en) * 1978-08-29 1980-03-06 Daimler Benz Ag Multi-jet fuel injector for Diesel IC engine - has pre-injection chamber with member controlling nozzle ducts on spring-loaded piston inside injector needle
FR2528915B1 (en) * 1982-06-18 1986-04-18 Semt FUEL INJECTOR AND INTERNAL COMBUSTION ENGINE PROVIDED WITH SAID INJECTOR
JPS58222971A (en) * 1982-06-22 1983-12-24 Mitsubishi Heavy Ind Ltd Fuel injection valve
JPS60142051A (en) * 1983-12-28 1985-07-27 Toyota Motor Corp Fuel injection valve for internal-combustion engine
JPH0196466A (en) * 1987-10-07 1989-04-14 Honda Motor Co Ltd Fuel injection nozzle for internal combustion engine
DE68905502T2 (en) * 1988-02-05 1993-09-23 Lucas Ind Plc FUEL INJECTION VALVE.
GB8827107D0 (en) * 1988-11-19 1988-12-21 Lucas Ind Plc Fuel injection nozzle
WO1993004277A1 (en) * 1991-08-15 1993-03-04 Yaroslavsky Zavod Toplivnoi Apparatury Method and nozzle for fuel feed to internal combustion engine
JPH05231273A (en) * 1992-02-19 1993-09-07 Hino Motors Ltd Fuel injection nozzle and manufacture thereof
US5353992A (en) * 1993-08-30 1994-10-11 Chrysler Corporation Multi-hole injector nozzle tip with low hydraulic plume penetration and large cloud-forming properties
DE19937961A1 (en) * 1999-08-11 2001-02-15 Bosch Gmbh Robert Fuel injection valve and method for producing outlet openings on valves
DE19950760A1 (en) 1999-10-21 2001-04-26 Bosch Gmbh Robert Fuel injection valve esp. for fuel injection systems of IC engines with piezo-electric or magneto-strictive actuator and valve closing body operable by valve needle working with valve
DE19963568A1 (en) * 1999-12-29 2001-07-05 Bosch Gmbh Robert Fuel injector
DE10116714A1 (en) * 2001-04-04 2002-10-10 Volkswagen Ag Fuel injection valve for internal combustion engine, preferably for high jet speeds, has spray channels with cross-sections that expand after jet hole
PL202458B1 (en) * 2001-05-04 2009-06-30 Edward Jakubowski Atomiser for use holes
DE10122350B4 (en) * 2001-05-09 2006-09-07 Robert Bosch Gmbh fuel injection system

Also Published As

Publication number Publication date
DE502004012167D1 (en) 2011-03-17
EP1702156A1 (en) 2006-09-20
DE10361762A1 (en) 2005-07-28
WO2005064150A1 (en) 2005-07-14

Similar Documents

Publication Publication Date Title
EP1379773B1 (en) Fuel injection valve
EP2087228B1 (en) Fuel injection valve
EP1114249B1 (en) Fuel injection valve
EP2521853B1 (en) Fuel injection valve
EP1370765B1 (en) Fuel injection valve
EP1379778B1 (en) Fuel injection valve
EP1312796B1 (en) Fuel injection valve
EP1633973B1 (en) Fuel injection valve
EP1702156B1 (en) Fuel injection valve
WO2002025100A1 (en) Fuel injection valve
EP1392969B1 (en) Fuel injection valve
EP1066468B1 (en) Fuel injection valve
DE10050752B4 (en) Fuel injection valve with a swirl-generating element
DE10050751A1 (en) Fuel injection valve for IC engines has swirl-generating device formed by swirl channels in upstream side of valve seat body
EP2925998B1 (en) Injection valve
EP1598550B1 (en) Fuel injector
EP1195516B1 (en) Fuel injection valve
DE10052146A1 (en) Fuel injector
EP1260703B1 (en) Fuel injection valve
DE10358726B4 (en) Fuel injector
EP1350947B1 (en) Fuel injection valve
EP1559906A2 (en) Fuel injection valve
DE102005024067A1 (en) Fuel injection valve for internal combustion engines has an excitable actuator for operating a valve-closing body to form a sealed seating with a valve-seating surface
DE10356057A1 (en) Fuel injection valve for IC engine has a groove downstream of the valve seat to prevent build up of fuel products on the valve wall
DE102005024377A1 (en) Fuel injection valve for fuel injectors of a combustion engine comprises a valve seat body having a valve seat surface interacting with a closing body which has an extension downstream of the valve seat surface

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060731

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

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

Designated state(s): DE FR IT

17Q First examination report despatched

Effective date: 20081202

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 502004012167

Country of ref document: DE

Date of ref document: 20110317

Kind code of ref document: P

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502004012167

Country of ref document: DE

Effective date: 20110317

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20111103

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502004012167

Country of ref document: DE

Effective date: 20111103

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

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

Ref country code: FR

Payment date: 20161124

Year of fee payment: 13

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

Ref country code: IT

Payment date: 20161124

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180731

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: 20171130

Ref country code: IT

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

Effective date: 20171119

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

Ref country code: DE

Payment date: 20190124

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004012167

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20200603