EP1379778A1 - Fuel injection valve - Google Patents

Fuel injection valve

Info

Publication number
EP1379778A1
EP1379778A1 EP02737742A EP02737742A EP1379778A1 EP 1379778 A1 EP1379778 A1 EP 1379778A1 EP 02737742 A EP02737742 A EP 02737742A EP 02737742 A EP02737742 A EP 02737742A EP 1379778 A1 EP1379778 A1 EP 1379778A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
fuel
injection valve
spray
valve according
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
EP02737742A
Other languages
German (de)
French (fr)
Other versions
EP1379778B1 (en
Inventor
Guenter Dantes
Detlef Nowak
Matthias Waldau
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 EP1379778A1 publication Critical patent/EP1379778A1/en
Application granted granted Critical
Publication of EP1379778B1 publication Critical patent/EP1379778B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/1853—Orifice plates

Definitions

  • the invention relates to a fuel injector according to the type of the main claim.
  • a fuel saving system for an internal combustion engine which has an injector with a fuel jet setting plate which has first nozzle holes which are arranged along a first circle, and second nozzle holes which pass along a second circle. are arranged.
  • the second circle has a diameter that is larger than that of the first circle.
  • the circles are arranged coaxially to a central axis of the adjustment plate.
  • Each hole axis of the second nozzle holes forms an acute angle m ⁇ t of a 0 reference plane, which is perpendicular to the central axis of the valve body. The angle is smaller than the one through each.
  • Hole axis of the first nozzle holes ' is formed with the reference plane.
  • atomized fuel injected through the first nozzle holes 5 can be directed away from atomized fuel injected through the second nozzle hole.
  • the fuel atomizations injected through the first nozzle holes do not interfere with the fuel atomizations are injected through the second nozzle holes, which makes it possible to atomize the injected fuel appropriately.
  • the fuel injector is in particular the lack of homogeneity of the mixture cloud and the problem of transporting the ignitable mixture into the area of the spark plug area of the spark plug.
  • swirl valves or swirl mechanisms must be used in these cases, on the one hand to fill the combustion chamber with the fuel / air mixture and on the other hand to lead the ignitable mixture to the spark plug.
  • the spark plug is usually molded directly. This leads to stronger ones . Sooting of the spark plug and. frequent thermal shocks, which means that the spark plug has a shorter service life.
  • the fuel injector according to the invention has the advantage that a dome-shaped curved injection perforated disk is attached to the downstream end of the valve seat body of the fuel injector in such a way that the coking can be optimized by reducing the dead volume.
  • the fuel perforated disk can be produced in a simple manner and can be integrated into an outlet
  • Fuel injector downstream of the sealing seat be inserted.
  • the attachment can take place, for example, by means of a weld seam.
  • the thermal shock loading and the sooting of the spark plug are reduced by an optimal hole design of the spray holes.
  • Sharp-edged spray holes and the conical shape of the same prevent the fuel flow in the spray hole from becoming detached, as a result of which the coking decreases considerably.
  • the conical spray holes have the advantage that the pressure drop of the fuel at the outlet g is minimal and thus maximum pressure energy is available for spray formation.
  • injection jets in the combustion chamber may advantageously also the mounting position of the inlet and outlet valves as well as the
  • Spark plug in the cylinder head are taken into account and nevertheless the combustion chamber geometry is used optimally.
  • FIG. 1 shows a schematic section through a first exemplary embodiment of a fuel injector designed according to the invention
  • FIG. 2 shows a schematic section - through the spray-side part of the first exemplary embodiment of the fuel injector according to the invention shown in FIG. 1 in area II in FIG.
  • Fig. 3 shows a schematic section through a second embodiment of the invention Fuel injection system in the same area as Fig. 2, and
  • Fig. 4 is a schematic section through the spray hole ' disk of the shown in Fig. 2
  • Fig. 1 shows an excerpt !! Sectional view a first concerningsbeispi ⁇ l an inventive SEN fuel injector 1 .
  • the fuel injector 1 is in the form of a " 'Brennscherinspritzvent ils 1 for Brennscherinspritzanlagen'-. ⁇ ' of • mixture-ignition internal combustion engines running.
  • the fuel injector 1. Suitable for direct injection of Fuel in a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injector _ 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged a valve seat body 5 to form a sealing seat.
  • fuel injector 1 is an inward-opening fuel injector 1, which has a bore 7 for forwarding the fuel downstream of the sealing seat.
  • the valve closing body 4 of the invention designed according to the fuel injection valve 1 has a nearly spherical 'shape. As a result, an offset-free, cardanic valve needle guide is achieved, which ensures that fuel injector 1 functions exactly.
  • the valve seat body 5 of the fuel injection valve 1 is almost cup-shaped and its shape contributes to the valve needle guidance.
  • the valve seat body 5 is inserted into an injection-side recess 34 of the nozzle body 2 and connected to the nozzle body 2 by means of a weld 35.
  • a calotte-shaped curved injection orifice disk 36 Arranged between the nozzle body 2 and the valve seat body 5 is a calotte-shaped curved injection orifice disk 36, which is fixed by means of the weld seam 35 between the nozzle body 2 and the valve seat body 5.
  • the spray plate 36 closes the fuel injection valve 1 on the outflow side and thereby covers the bore 7.
  • the fuel flowing through the fuel injection valve 1 is injected into the combustion chamber of the internal combustion engine (not shown) via a plurality of spray holes 37 arranged in the spray orifice plate 36.
  • a more detailed description of the spray perforated disk 36 can be found in the description of FIGS. 2 to 4.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnet coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a coil support 12 which bears against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheath 18, which may be extruded onto internal pole.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disc 15 is used for adjusting the stroke.
  • An armature 20 is located on the other side of the adjusting disc 15. This armature is non-positively connected to the valve needle 3 via a first flange 21, which is connected to the first flange 21 by a weld 22.
  • a return spring 23 is supported, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • a second flange 31 is arranged on the outflow side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld seam 33.
  • An elastic intermediate ring 32 is arranged between the armature 20 and the second flange 31 for damping armature bouncers when the fuel injection valve 1 is closed.
  • valve needle guide 14 in the armature 20 and on the valve body 5, fuel channels 30a to 30c run, which guide the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the bore 7.
  • the fuel injection valve 1 is sealed by a seal 28 against a distributor line, not shown.
  • the first flange 21 on the valve needle 3 is acted upon by the return spring 23 against its lifting direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact.
  • the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction.
  • the armature 20 receives the first flange 21, -IER 'to the valve needle 3 is welded, and thus the' valve needle 3 in the lift direction.
  • the valve closing body 4 which is operatively connected to the valve needle 3, lifts off the valve seat surface 6, as a result of which the fuel led to the bore 7 via the fuel channels 30a to 30c is sprayed off. If the coil current is switched off, the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23 ' on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction. As a result, the valve closing body 4 rests on the valve seat surface 6, and the fuel injector il -1 is closed. The armature 20 rests on the armature stop formed by the second flange 31.
  • Fig. 2 shows an excerpt from the section shown in FIG. 1 marked with II section from the in Fig. 1 shown first embodiment of a fuel injection valve 1 designed according to the invention.
  • Fuel injector 1 covers the combustion chamber.
  • the spray orifice plate 36 is fixed to the valve seat body 5 by a weld seam 35, which connects the valve body 5 with the nozzle body 2.
  • the bore 7 is also covered by the spray perforated disk 36.
  • Brennk-ra f machine take over injection holes 37, which are formed in the injection orifice plate 36 and are offset in relation to the hole 7 arranged centrally in the valve body 5. A deflection of the fuel flow is thereby achieved. which causes the spray holes 37 to be less inclined, thereby facilitating their manufacture and increasing precision. manufacturing increased.
  • the advantage of the dome shape of the spray orifice plate 36 is, on the one hand, that it is easy to manufacture and, on the other hand, that it is flexible compared to the fuel injection valves 1, which can be equipped with the dome orifice plate 36.
  • the valve closing body 4 which in the present exemplary embodiment has a plurality of gates 38, and has passed through the bore 7, it enters a volume 39 which is formed between an end face 40 of the valve seat body 5 and the spray orifice plate 36. Due to the fuel pressure, the fuel is injected into the combustion chamber of the internal combustion engine with a change of direction through the spray holes 37 formed in the spray hole disk 36.
  • the spray holes ' 37 are conical in shape and in particular have sharp exit edges 41 and a funnel-shaped inflow region 42.
  • This hole shape offers the particular advantage that the fuel flow does not stop within the spray holes 37, so that the outlet openings of the spray holes 37 tapering towards the combustion chamber are completely filled with fuel over their cross section. In this way, coking can be prevented since there is no recirculation of the fuel in the spray hole 37.
  • the spray orifice plate 36 can be used flexibly for any jet opening angle and angle of inclination of the sealing seat as well as for any static flow values through the fuel injection valve 1.
  • FIG. 3 shows an excerpted sectional illustration in the same view as FIG. 2 shows a second exemplary embodiment of a fuel injection valve 1 according to the invention.
  • the same components are provided with the same reference eich ⁇ n.
  • valve seat body 5 and the spray hole disk 36 in the present exemplary embodiment are adapted to one another, ie the volume 39 formed between the valve seat body 5 and the spray hole disk 36 is smaller than in the first exemplary embodiment shown in FIG. 2.
  • the remaining components of the fuel injection valve 1 can be identical to the fuel injection valve 1 shown in FIGS. 1 and 2.
  • the reduction in volume 39 allows a homogenization of the fuel flow, which does not come to a standstill in the dead times of fuel injector 1. This also reduces coking.
  • the flow deflection is also increased by reducing the volume 39, as a result of which the inclination of the spray holes 37 can be further reduced and the precision of the spray holes 37 can be increased. '.
  • Fig. 4 shows . " • In a cut-out, highly schematic” representation, a cut-out from the spray hole disk 36 of a fuel injector 1 designed according to the invention in the area IV in FIG. III.
  • Spray holes 37 is formed on the outflow side and ensures that the recirculation is suppressed
  • Spray hole 37 since the fuel flow does not stop and as a result the ⁇ cross-section is continuously filled with fuel.
  • the spray holes 37 in the spray hole disk 36 can be produced by means of single-layer micro-electroplating, punching, etching or laser drilling, the spray hole disk 36 still being flat. After the injection orifices 37 have been produced, the spray orifice disk 36 is calotted, for example by means of embossing.
  • Di ⁇ invention is not limited to di ⁇ shown -AusbowungsbeiInstitut and z. B .. also for after internally opening fuel fine spray valves 1 of any design can be used.

Abstract

The invention relates to a fuel injection valve (1) for fuel injection systems of internal combustion engines, comprising a solenoid (10), a valve needle (3), which interacts with the solenoid (10) and is impinged by a return spring (23) in a closing direction, for actuating a valve closing body (4), the latter forming a tight seat with a valve seat surface (6) configured on a valve seat body (5) and an injection orifice plate (36) located downstream of the valve body (5). The injection orifice plate (36) is curved in a spherical manner in the flow direction of the fuel.

Description

i Ui u
Brenns offeinspritzventilBrenns off injector
5 St.and der Technik5 State of the art
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Haupt nspruchs .The invention relates to a fuel injector according to the type of the main claim.
0 Aus der DE 198 27 219 AI ist ein Brennstoffeinsparitzsystem für eine Brennkraftmaschine bekannt, welche einen Injektor mit einer BrennstoffStrahleinstellplatte aufweist, welche erste Düsenlöcher besitzt, die entlang eines ersten Kreises angeordnet sind, sowie zweite Düsenlöcher, die entXang eines 5 zweiten Kreises . angeordnet sind. Der zweite Kreis hat einen Durchmesser, der größer als derjenige des ersten Kreises ist. Die Kreise sind dabei .koaxial zu einer Mittelachse der Einstellplatte angeordnet. Jede Lochachse der zweiten Düsenlöcher bildet einen spitzen Winkel m±t einer 0 Referenzebene, die senkrecht zur Mittelachse des Ventilkörpers ist. Der Winkel ist kleiner als derjenige, der durch jede. Lochachse der ersten Düsenlöcher ' mit der Referenzebene gebildet wird. Daher können BrennstoffZerstäubungen, die durch die ersten Düsenlöcher 5 eingespritzt werden, weg von den BrennstoffZerstäubungen gerichtet werden, die durch die zweiten Düsenlöcher eingespritzt werden. Als ein Ergebnis stören die Brennstoffzerstäubungen, die durch die ersten Düsenlöcher eingespritzt werden,- nicht die BrennstoffZerstäubungen, die durch die zweiten Düsenlöcher eingespritzt werden, was es ermöglicht , eingespritzten Brennstoff geeignet zu zerstäuben .From DE 198 27 219 AI a fuel saving system for an internal combustion engine is known which has an injector with a fuel jet setting plate which has first nozzle holes which are arranged along a first circle, and second nozzle holes which pass along a second circle. are arranged. The second circle has a diameter that is larger than that of the first circle. The circles are arranged coaxially to a central axis of the adjustment plate. Each hole axis of the second nozzle holes forms an acute angle m ± t of a 0 reference plane, which is perpendicular to the central axis of the valve body. The angle is smaller than the one through each. Hole axis of the first nozzle holes ' is formed with the reference plane. Therefore, atomized fuel injected through the first nozzle holes 5 can be directed away from atomized fuel injected through the second nozzle hole. As a result, the fuel atomizations injected through the first nozzle holes do not interfere with the fuel atomizations are injected through the second nozzle holes, which makes it possible to atomize the injected fuel appropriately.
-Nachteilig an dem aus der obengenannten Druckschrift bekannten Verfahren zur Gemischbildung bzw .-Disadvantage of the known from the above-mentioned method for mixture formation or.
Brennstoffeinspritzventil ist insbesondere die mangelnde Homogenität der Gemischwolke sowie das Problem, das zündfähige Gemisch in den Bereich der Funkensfcrecke der Zündkerze zu transportieren . Um eine emis sionsarme , brennstoff sparende Verbrennung zu ermöglichen, müssen in diesen Fällen komplizierte Brennraumgeometrien, Drallventile oder Verwirbelungsmechanismen benut zt werden, um einerseits den Brennraum mit dem Brennstoff -/Luftgemisch zu füllen und andererseits das zündfähige Gemisch zur Zündkerze zu führen .The fuel injector is in particular the lack of homogeneity of the mixture cloud and the problem of transporting the ignitable mixture into the area of the spark plug area of the spark plug. In order to enable low-emission, fuel-saving combustion, complicated combustion chamber geometries, swirl valves or swirl mechanisms must be used in these cases, on the one hand to fill the combustion chamber with the fuel / air mixture and on the other hand to lead the ignitable mixture to the spark plug.
Dabei wird zumeist die Zündkerze direkt angespritzt . Dies führt zu starker . Verrußung der Zündkerze und . häufigen Thermoschocks , wodurch die Zündkerze eine kürzere Lebensdauer aufweist .The spark plug is usually molded directly. This leads to stronger ones . Sooting of the spark plug and. frequent thermal shocks, which means that the spark plug has a shorter service life.
Vorteile der ErfindungAdvantages of the invention
Das e f indungsgemäße Brennstof f einspritzventil mit den kennzeichnenden Merkmalen des Haupt anspruchs hat demgegenüber den Vorteil , daß eine kalottenför ige gewölbte Sprit zlochscheibe so am abströmseitigen Ende _ des Ventilsitzkörpers des Brennstoff einspritzventils angebracht ist , daß die Verkokung durch eine Verkleinerung des Totvolumens optimiert werden kann .The fuel injector according to the invention, with the characterizing features of the main claim, has the advantage that a dome-shaped curved injection perforated disk is attached to the downstream end of the valve seat body of the fuel injector in such a way that the coking can be optimized by reducing the dead volume.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des im Hauptanspruch angegebenen Brennstoff einspritzventils möglich .The measures listed in the subclaims allow advantageous developments of the fuel injector specified in the main claim.
Vorteilhafterweise kann die Sprit zlochscheibe in einfacher Weise hergestellt und in eine Ausιιehτrmng desAdvantageously, the fuel perforated disk can be produced in a simple manner and can be integrated into an outlet
•Brennstof f einspritzventils abstr&mseitig des D ichtsitzes eingelegt werden. Die Befestigung kann beispielsweise 'mittels einer Schweißnaht, erfolgen.• Fuel injector downstream of the sealing seat be inserted. The attachment can take place, for example, by means of a weld seam.
Insbesondere werden die Therraoschockbelasüung und die Verrußung der Zündkerze durch eine optimale Lochtgestaltung der Abspritzlöcher vermindert. Scharfkantige Abspritzlöcher und die konische Gestaltung derselben verhindern ein Ablösen der Brennstoffströmung im Abspritzloch, wodurch die Verkokung stark zurückgeht .In particular, the thermal shock loading and the sooting of the spark plug are reduced by an optimal hole design of the spray holes. Sharp-edged spray holes and the conical shape of the same prevent the fuel flow in the spray hole from becoming detached, as a result of which the coking decreases considerably.
Die konischen Abspritzlöcher haben den Vorteil , daß der Druckabfall des Brennstoffs an der Austrittsoff g minimal ist und somit maximale Druckenergie zur Spraybildung zur Verfügung steht .The conical spray holes have the advantage that the pressure drop of the fuel at the outlet g is minimal and thus maximum pressure energy is available for spray formation.
' -Durch eine gezielte Anordnung der Abspritzlöcher und damit der Einspritzstrahlen im Brennraum kann vorteilhafterweise auch die Einbaulage der Ein- und Auslaßventile sowie der '-By a specific arrangement of injection ports, and thus the injection jets in the combustion chamber may advantageously also the mounting position of the inlet and outlet valves as well as the
Zündkerze im Zylinderkopf berücksichtigt werden und nrotzdem die Brennraumgeometrie optimal genutzt werden.Spark plug in the cylinder head are taken into account and nevertheless the combustion chamber geometry is used optimally.
Zeichnungdrawing
Ausfuhrungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:Exemplary embodiments of the invention are shown in simplified form in the drawing and are explained in more detail in the description below. Show it:
Fig. 1 einen schε atisehen Schnitt durch ein erstes Ausführungsbeispiel eines erfindungsge äß ausgestalteten Brennstoffeinspritzventils ,1 shows a schematic section through a first exemplary embodiment of a fuel injector designed according to the invention,
Fig. 2 einen schematischen Schnitt - durch den abspritzseitigen Teil des in Fig. 1 dargestellten ersten Ausführungsbeispiels des erfindungsgemäßen Brennstoffeinspritzventils im Bereich II in Fig.FIG. 2 shows a schematic section - through the spray-side part of the first exemplary embodiment of the fuel injector according to the invention shown in FIG. 1 in area II in FIG.
1,1,
Fig. 3 einen schematischen Schnitt durch ein zweites Ausführungsbeispiel des erfindungsgemäßen Brennstoffeinspritzsystems im gleichen Bereich wie Fig. 2, undFig. 3 shows a schematic section through a second embodiment of the invention Fuel injection system in the same area as Fig. 2, and
Fig. 4 einen schematischen Schnitt durch die Spritzlochs'cheibe des in Fig. 2 dargestelltenFig. 4 is a schematic section through the spray hole ' disk of the shown in Fig. 2
Ausführungsbeispiels eines erfindungsge äßen Brennstoffeinspritzventils im Bereich IV in Fig. 2.Embodiment of a fuel injection valve according to the invention in area IV in FIG. 2.
Beschreibung der AusfuhrungsbeispieleDescription of the exemplary embodiments
Fig. 1 zeigt in einer auszugsweise!! Schnittdarstellung ein erstes Ausführungsbeispiεl eines erfindungsgem ßen Brennstoffeinspritzventils 1.. Das Brennstoffeinspritzventil 1 ist in der Form eines"' Brennstoffeinspritzvent ils 1 für Brennstoffeinspritzanlagen'- . ■' von • gemischverdichtenden, fremdgezündeten Brennkraftmaschinen , ausgeführt. Das Brennstoffeinspritzventil 1 . eignet sich zum direkten Einspritzen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraftmaschine .Fig. 1 shows an excerpt !! Sectional view a first Ausführungsbeispiεl an inventive SEN fuel injector 1 .. The fuel injector 1 is in the form of a "'Brennstoffeinspritzvent ils 1 for Brennstoffeinspritzanlagen'-. ■' of • mixture-ignition internal combustion engines running. The fuel injector 1. Suitable for direct injection of Fuel in a combustion chamber, not shown, of an internal combustion engine.
Das Brennstoffeinspritzventil _ 1 besteht aus einem Düsenkörper 2, in welchem eine Ventilnadel 3 angeordnet ist. Die Ventilnadel 3 steht in Wirkverbindung mit einem Ventilschließkörper 4, der mit einer aτ_ιf einem Ventilsitzkörper 5 angeordneten Ventilsitzflache 6 zu einem Dichtsitz zusammenwirkt . • Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, welches über eine Bohrung 7 zur Weiterleitung des Brennstoffs abströmseitig des Dichtsitzes verfügt.The fuel injector _ 1 consists of a nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged a valve seat body 5 to form a sealing seat. • In the exemplary embodiment, fuel injector 1 is an inward-opening fuel injector 1, which has a bore 7 for forwarding the fuel downstream of the sealing seat.
Der Ventilschließkörper 4 des erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1 weist eine nahezu kugelförmige ' Form auf. Dadurch wird eine versatzfreie, kardanische Ventilnadelführung erzielt, die für eine exakte Funktionsweise des Brennstoffeinspritzventils 1 sorgt. Der Vεntilsitzkörper 5 des Brennstoffeinspritzventils 1 ist nahezu topfförmig ausgebildet und trägt durch seine Form zur Vεntilnadelführung bei. Der Ventilsitzkörper 5 ist dabei in eine abspritzseitige Ausnehmung 34 des Düsenlcörpers 2 eingesetzt und mittels einer Schweißnaht 35 mit dem Düsenkörper 2 verbunden. Zwischen dem Düsenkörper 2 und dem Ventilsitzkörper 5 ist einε kalotuenförmig gεwölbte Spritzlochscheibe 36 angeordnet, die mittels der Schweißnaht 35 zwischen dem Düsenkörper 2 und dem Vεntilsitzkörper 5 fixiert ist.The valve closing body 4 of the invention designed according to the fuel injection valve 1 has a nearly spherical 'shape. As a result, an offset-free, cardanic valve needle guide is achieved, which ensures that fuel injector 1 functions exactly. The valve seat body 5 of the fuel injection valve 1 is almost cup-shaped and its shape contributes to the valve needle guidance. The valve seat body 5 is inserted into an injection-side recess 34 of the nozzle body 2 and connected to the nozzle body 2 by means of a weld 35. Arranged between the nozzle body 2 and the valve seat body 5 is a calotte-shaped curved injection orifice disk 36, which is fixed by means of the weld seam 35 between the nozzle body 2 and the valve seat body 5.
Die Spritzlochscheibe 36 schließt das Brennstoffeinspritzventil 1 abströmseitig ab und deckt dabei die Bohrung 7 ab. Der das Brennstoffeinsprit zventil 1 durchströmende Brennstoff wird über mehrere in der Spritzlochscheibe 36 angeordnete Abspritzlδcher 37 in -den nicht weiter dargestellten Brennraum der Brennkraftmaschine eingespritzt. Eine detailliertere Beschreibung der Spritzlochscheibe 36 ist der Beschreibung zu den Figuren 2 bis 4 zu entnehmen.The spray plate 36 closes the fuel injection valve 1 on the outflow side and thereby covers the bore 7. The fuel flowing through the fuel injection valve 1 is injected into the combustion chamber of the internal combustion engine (not shown) via a plurality of spray holes 37 arranged in the spray orifice plate 36. A more detailed description of the spray perforated disk 36 can be found in the description of FIGS. 2 to 4.
Der Düsenkörper 2 ist durch eine Dichtung 8 gegen einen Außenpol 9 einer Magnetspulε 10 abgedichtet. Die Magnetspule 10 ist in einε 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 Spalt 26 voneinander getrennt und stützen sich auf einem Verbindungsbauteil 29 ab. Die Magnetspule 10 wird über eine Leiuung 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 nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnet coil 10. The magnetic coil 10 is encapsulated in a coil housing 11 and wound on a coil support 12 which bears against an inner pole 13 of the magnetic coil 10. The inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29. The magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17. The plug contact 17 is surrounded by a plastic sheath 18, which may be extruded onto internal pole. "13
Die Ventilnadel 3 ist in einer Ventilnadelführung 14 geführt, welche scheibenförmig ausgeführt ist. Zur Hubeinsteilung dient eine zugepaarte Einstellschεibe 15. An der anderen Seite der Einstellscheibε 15 befindet sich ein Anker 20. Dieser steht über einen 'ersten Flansch 21 kraftschlüssig mit der Ventilnadel 3 in Verbindung, welche durch eine Schweißnaht 22 mit dem erstεn ' Flansch 21 verbunden ist. Auf dem ersten Flansch 21, stützt sich eine 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 disc-shaped. A paired adjusting disc 15 is used for adjusting the stroke. An armature 20 is located on the other side of the adjusting disc 15. This armature is non-positively connected to the valve needle 3 via a first flange 21, which is connected to the first flange 21 by a weld 22. On the first flange 21, a return spring 23 is supported, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
Abströmseitig des Ankers 20 ist ein zweiter Flansch 31 angeordnet, der als unterer Ankeranschlag dient. Er ist über eine Schweißnaht 33 kraftschlüssig mit dεr Ventilnadel 3 verbunden. -Zwischen dem Anker 20 und dem zweiten Flansch 31 ist ein elastischer Zwischenring 32 zur Dämpfung von Ankerprellern beim Schließen des Brennstoffeinspritzventils 1 angeordnet.A second flange 31 is arranged on the outflow side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld seam 33. An elastic intermediate ring 32 is arranged between the armature 20 and the second flange 31 for damping armature bouncers when the fuel injection valve 1 is closed.
In der Ventilnadelführung 14, im Anker 20 und am Ventilsi zkörper 5 verlaufen Brennstoffkanäle 30a bis 30c, die den Brennstoff, welcher über eine zentrale Brennstoffzufuhr 16 zugeführt und durch ein Filterelement 25 gefiltert wird, zur Bohrung 7 leiten. Das Brennstoffeinspritzvεntil 1 ist durch eine Dichtung 28 gegen eine nicht weiter dargestellte Verteilerleitung abgedichtet.In the valve needle guide 14, in the armature 20 and on the valve body 5, fuel channels 30a to 30c run, which guide the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the bore 7. The fuel injection valve 1 is sealed by a seal 28 against a distributor line, not shown.
Im Ruhezustand des Brennsto feinspritzventils 1 wird der erste Flansch 21 an der Ventilnadel 3 von der Rückstellfeder 23 entgegen seiner Hubrichtung so beaufschlagt, daß der Ventilschließkörper 4 am Ventilsitz 6 in dichtender Anlage gehalten wird. Der Anker 20 liegt auf dem Zwischenring 32 auf, der sich auf dem zweiten Flansch 31 abstützt. Bei Erregung der Magnetspule 10 baut diese ein Magnetfeld auf, welches den Anker 20 entgegen der Federkraft der Rückstellfede 23 in Hubrichtung bewegt. Dabei nimmt der Anker 20 den ersten Flansch 21, -welcher' mit der Ventilnadel 3 verschweißt ist, und damit die ' Ventilnadel 3 ebenfalls in Hubrichtung mit. Der mit der Ventilnadel 3 in Wirkverbindung stehende Vεntilschließkörper 4 hebt von der Ventil sitzfläche 6 ab, wodurch der über die Brennstoffkanäle 30a bis 30c zur Bohrung 7 geführte Brennstoff abgespritzt wird. Wird der Spulenstrom abgeschaltet , fällt der Anker 20 nach genügendem Abbau des Magnetfeldes durch den Druck der Rückstellfeder 23 ' auf den ersten Flansch 21 vom I nnenpol 13 ab , wodurch sich die Ventilnadel 3 entgegen der Hubrichtung bewegt . Dadurch setzt der Ventilschließkörper 4 auf der Ventilsitzfläche 6 auf , und das .Brennstoffeinspri zvent il -1 wird geschlossen . Der Anker 20 setzt auf dem durch den zweiten Flansch 31 gebildeten Ankeranschlag auf .In the idle state of the fuel fine injection valve 1, the first flange 21 on the valve needle 3 is acted upon by the return spring 23 against its lifting direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact. The armature 20 rests on the intermediate ring 32, which is supported on the second flange 31. When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction. The armature 20 receives the first flange 21, -welcher 'to the valve needle 3 is welded, and thus the' valve needle 3 in the lift direction. The valve closing body 4, which is operatively connected to the valve needle 3, lifts off the valve seat surface 6, as a result of which the fuel led to the bore 7 via the fuel channels 30a to 30c is sprayed off. If the coil current is switched off, the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23 ' on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction. As a result, the valve closing body 4 rests on the valve seat surface 6, and the fuel injector il -1 is closed. The armature 20 rests on the armature stop formed by the second flange 31.
Fig . 2 zeigt in einer auszugsweisen ■' Schnittdarstellung den in Fig . 1 mit II bezeichneten Ausschnitt aus dem in Fig . 1 dargestellten ersten Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstof feinspritzventils 1 .Fig. 2 shows an excerpt from the section shown in FIG. 1 marked with II section from the in Fig. 1 shown first embodiment of a fuel injection valve 1 designed according to the invention.
Wie bereits in der Beschreibung " zu -Fig . 1 erwähnt , ist an einem abströmsεitigen Ende des Brennstof feinsprit zventil s 1 eine Spritzlochscheibe 36 angeordnet , die dasAs already mentioned in the specification, "to -Fig. 1, at one end of the abströmsεitigen Brennstof finely sprit zventil s 1 arranged a perforated spray disk 36, the
Brennstof f einspritzventil 1 zum Brennraum hin abdeckt . Die Spritzlochscheibe 36 ist durch eine Schweißnaht 35 , welche den Ventilsit zkörper 5 mit dem Düsenkörper 2 verbindet , am Ventil sitzkörper 5 fixiert . Durch die Spritzlochscheibe 36 wird ebenfalls die Bohrung 7 abgedeckt-. Die Einspritzung des Brennstoffs in den Brennraum der . Brennk-ra f maschine übernehmen Abspritzlöcher 37 , die in der Spritzl ochscheibe 36 ausgebildet und gegεnüber der zentral im Ventil sit zkörper 5 angeordneten Bohrung 7 versetzt sind . Dadurch wird eine Umlenkung der Brennstof f Strömung erzielt., . die bewirkt , daß die Abspritzlöcher 37 weniger stark geneigt sein .können und sich dadurch ihre Herstellung erleichtert sowie die Präzision bei. der Herstellung erhöht .Fuel injector 1 covers the combustion chamber. The spray orifice plate 36 is fixed to the valve seat body 5 by a weld seam 35, which connects the valve body 5 with the nozzle body 2. The bore 7 is also covered by the spray perforated disk 36. The injection of fuel into the combustion chamber. Brennk-ra f machine take over injection holes 37, which are formed in the injection orifice plate 36 and are offset in relation to the hole 7 arranged centrally in the valve body 5. A deflection of the fuel flow is thereby achieved. which causes the spray holes 37 to be less inclined, thereby facilitating their manufacture and increasing precision. manufacturing increased.
Die " Sprit zlochscheibe 36 ist im vorliegendenThe " Sprit zlochscheibe 36 is here
Ausführungsbeispiel kalottiert gewölbt ausgebildet und an den Ventilsitzkörper 5 angepaßt . Der Vorteil der kalottierten Form der Spritzlochscheibe 36 liegt zum einen in der einf achen Herstεllbarkeit , zum anderen in der Flexibilität gegenüber den Brennstoffeinspritzve ntilen 1 , die mit der kalottierten Spritzlochscheibe 36 au sgestattet werden können . Wenn der Brennstoff den Ventilschliεßkörpεr 4 , der im vorliegenden Ausführungsbeispiel mehrere Anschnitte 38 aufweist, und die Bohrung 7 passiert hat, gelangt er in ein Volumen 39, das zwischen einer Stirnseite 40 des Ventilsitzkörpers 5 und der Spritzlochscheibe 36 ausgebildet ist . Durch den Brennstoffdruck wird der Brennstoff unter einem Richtungswechsel durch die in der Spritzlochschεibe 36 ausgebildeten Abspritzlöcher 37 in den Brennraum der Brennkraftmaschine eingespritzt.Embodiment dome-shaped arched and adapted to the valve seat body 5. The advantage of the dome shape of the spray orifice plate 36 is, on the one hand, that it is easy to manufacture and, on the other hand, that it is flexible compared to the fuel injection valves 1, which can be equipped with the dome orifice plate 36. When the fuel has passed the valve closing body 4, which in the present exemplary embodiment has a plurality of gates 38, and has passed through the bore 7, it enters a volume 39 which is formed between an end face 40 of the valve seat body 5 and the spray orifice plate 36. Due to the fuel pressure, the fuel is injected into the combustion chamber of the internal combustion engine with a change of direction through the spray holes 37 formed in the spray hole disk 36.
Die Abspritzlöcher ' 37 sind dabei konisch geformt und weisen insbesondere scharfe Austrittskanten 41 sowie einen trichterförmigen Zuströmbereich 42 auf. Diese Lochform bietet insbesondere den Vorteil, daß die Brennsto fStrömung innerhalb der Abspritzlöcher 37 nicht abreißt, so daß die Austrittsöffnungen der sich zum Brennraum hin verjüngenden Abspritzlöcher 37 vollständig über ihren Querschnitt mit Brennstoff gefüllt sind. Auf diese Weise kann Verkokung verhindert werden, da keine Rezirkulation des Brennstoffs im Abspritzloch 37 auftritt.The spray holes ' 37 are conical in shape and in particular have sharp exit edges 41 and a funnel-shaped inflow region 42. This hole shape offers the particular advantage that the fuel flow does not stop within the spray holes 37, so that the outlet openings of the spray holes 37 tapering towards the combustion chamber are completely filled with fuel over their cross section. In this way, coking can be prevented since there is no recirculation of the fuel in the spray hole 37.
Die Spritzlochscheibe 36 ist flexibel anwendbar für beliebige Strahlöffnungswinkel und Neigungswinkel des Dichtsitzes sowie für beliebige statische Durchflußwerte durch das Brennstoffeinspritzventil 1.The spray orifice plate 36 can be used flexibly for any jet opening angle and angle of inclination of the sealing seat as well as for any static flow values through the fuel injection valve 1.
Fig. 3 zeigt in einer auszugsweisen Schnittdarstellung in gleicher Ansicht wie Fig. 2 ein zweites Ausführungsbeispiel eines erfindungsgεmäßen Brennstoffeinspritzventils 1.' Gleiche Bauteile sind dabei mit übereinstimmenden Bezugs eichεn versehen.3 shows an excerpted sectional illustration in the same view as FIG. 2 shows a second exemplary embodiment of a fuel injection valve 1 according to the invention. The same components are provided with the same reference eichεn.
Im Gegensatz zu Fig. 2 sind im vorliegenden Ausführungsbeispiel der Ventilsitzkörper 5 und die Spritzlochscheibe 36 in ihrer Form aneinander angepaßt, d. h. , das zwischen dem Ventilsitzkörper 5 und der Spritzlochscheibe 36 ausgebildete Volumen 39 ist kleiner als in dem in Fig. 2 dargestellten ersten Ausführungsbeispiel. Die übrigen Komponenten des Brennstoffeinspritzventils 1 können identisch mit -dem in Fig. 1 und 2 dargestellten Brennstoffεinspritzventil 1 ausgebildet sein.In contrast to FIG. 2, the shape of the valve seat body 5 and the spray hole disk 36 in the present exemplary embodiment are adapted to one another, ie the volume 39 formed between the valve seat body 5 and the spray hole disk 36 is smaller than in the first exemplary embodiment shown in FIG. 2. The remaining components of the fuel injection valve 1 can be identical to the fuel injection valve 1 shown in FIGS. 1 and 2.
Die Verminderung des Volumens 39 erlaubt eine Homogenisierung- der BrennstoffStrömung, die in den Totzeiten des Brennstoffeinspritzventils 1 nicht zum Erliegen kommt. Die Verkokung wird dadurch ebenfalls reduziert.The reduction in volume 39 allows a homogenization of the fuel flow, which does not come to a standstill in the dead times of fuel injector 1. This also reduces coking.
Auch die Stromungsumlenkung wird durch die Verringerung des Volumens 39 verstärkt, wodurch diε Nεigung der Abspritzlöcher 37 weiter verringert werden kann und die Präzision der Hεrstεllung der Abspritzlöcher 37 erhöht werden kann . ' .The flow deflection is also increased by reducing the volume 39, as a result of which the inclination of the spray holes 37 can be further reduced and the precision of the spray holes 37 can be increased. '.
Fig. 4 zeigt. " • in einer ausschnittsweisen, stark schematisierten 'Darstellung einεn Ausschnitt aus der Spritzlochscheibe 36 eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1 im Bereich IV in Fig. III.Fig. 4 shows . " • In a cut-out, highly schematic" representation, a cut-out from the spray hole disk 36 of a fuel injector 1 designed according to the invention in the area IV in FIG. III.
In Fig. 4 ist der konische Verlauf der Abspritzlöcher 37 mit dem trichterförmigen Zulaufbereich 42 und dεn scharfεn4, the conical shape of the spray holes 37 with the funnel-shaped inlet area 42 and dεn is sharp
Kanten 41 deutlich erkennbar. Der engste Querschnitt derEdges 41 clearly visible. The narrowest cross section of the
Abspritzlöcher 37 ist dabei abströmseitig ausgebildet und sorgt für eine Unterdrückung der Rezirkulation imSpray holes 37 is formed on the outflow side and ensures that the recirculation is suppressed
Abspritzloch 37, da der Brennstoffström nicht abreißt und dadurch der ^ Austrittsquerschnitt kontinuierlich mit Brennstoff gefüllt ist.Spray hole 37, since the fuel flow does not stop and as a result the ^ cross-section is continuously filled with fuel.
Die Herstellung der Abspritzlöcher 37 in der Spritzlochscheibe 36 kann dabei mittels einlagiger Mikrogalvanik, Stanzen, Ätzen, oder Laserbohren erfolgen, wobei die Spritzlochscheibe 36 noch plan ist. Nach der Herstellung der Abspritzlöcher 37 wird die Spritzlochscheibe 36 beispielsweise mittels Prägεn kalottiert .The spray holes 37 in the spray hole disk 36 can be produced by means of single-layer micro-electroplating, punching, etching or laser drilling, the spray hole disk 36 still being flat. After the injection orifices 37 have been produced, the spray orifice disk 36 is calotted, for example by means of embossing.
Diε Erfindung' ist nicht auf diε dargestellten -Ausfuhrungsbeispiele beschränkt und z. B.. auch für nach innen öffnende Brennstof feinspritzvεntile 1 beliebiger Bauweisen anwendbar . Diε invention 'is not limited to diε shown -Ausfuhrungsbeispiele and z. B .. also for after internally opening fuel fine spray valves 1 of any design can be used.

Claims

1010
AnsprücheExpectations
15 1_, Brennstoffeinspritzventil (1) für15 1_, fuel injector (1) for
' .' ■ Brennstoffeinspritzanlagen von Brennkraftmaschinen mit einem erregbaren Aktuator (10), einer mit dem Aktuator (10) in Wirkverbindung stehenden und in einer Schließrichtung von einer Rückstellfeder (23) beaufschlagten Ventilnadel (3) zur'. '■ Fuel injection systems of internal combustion engines with an excitable actuator (10), a valve needle (3) which is operatively connected to the actuator (10) and acted upon in a closing direction by a return spring (23)
20 Betätigung eines Ventilschließkörpers (4) , der zusammen mit einer an 'einem Ventilsitzkörper (5) ausgebildeten Ventilsitzfläche (6) einen Dichtsitz bildet, und einer abströmseitig des Ventilsitzkörpers (5) angeordneten Spritzlochscheibe (36) ,20 actuation of a valve closing body (4), which forms a sealing seat together with a valve seat surface (6) formed on a valve seat body (5), and an injection orifice disk (36) arranged on the downstream side of the valve seat body (5),
25 dadurch gekennzeichnet, daß die Spritzlochscheibe (36) in einer Strömungsrichtung des Brennstoffs kalottiert gewölbt ausgebildet ist .25 characterized in that the spray orifice plate (36) is dome-shaped curved in a flow direction of the fuel.
2. Brennstoffeinspritzventil nach Anspruch 1, 30 dadurch gekennzeichnet, daß die Spritzlochscheibe (36) in einεr Ausnehmung (34) eines Düsenkörpers (2) des Brennstoffeinspritzventils (1) angeordnet ist.2. Fuel injection valve according to claim 1, 30 characterized in that the spray orifice plate (36) is arranged in a recess (34) of a nozzle body (2) of the fuel injection valve (1).
35 3. Brennstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß die Spritzlochscheibe (36) mittels einer Schweißnaht35 3. Fuel injection valve according to claim 2, characterized in that the spray orifice plate (36) by means of a weld seam
(35) an dem Düsenkörper (2) des Brennstoffeinspritzventils(35) on the nozzle body (2) of the fuel injector
(1) fixiert ist. (1) is fixed.
4. Brennstoffeinspritzventil nach Anspruch 3, dadurch gekennzeichnet, daß sich die Schweißnaht (35) in den Ventilsitzkörper '(5) erstreckt.4. Fuel injection valve according to claim 3, characterized in that the weld seam (35) extends into the valve seat body ' (5).
5. Brennstoffeinsprit∑venuil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß durch die Spritzlochscheibe (36) eine im Ventilsitzkörper (5) zentral angeordnete Bohrung (7) abgedeckt ist.5. Fuel injection valve according to one of claims 1 to 4, characterized in that a hole (7) arranged centrally in the valve seat body (5) is covered by the spray perforated disk (36).
6. Brennstoffeinspritzventil nach einem der Ansprache 1 bis 5, '. dadurch gekennzeichnet; . daß in der Spritzlochscheibe (36) mehrere Abs ritzlöcher (37) ausgebildet sind.6. Fuel injection valve according to one of the claims 1 to 5, '. characterized; , that in the spray hole disc (36) a plurality of Abs scratch holes (37) are formed.
7. Brennstoffeinspritzventil nach Anspruch 6, dadurch gekennzeichnet, daß keines der Abspritzlöcher (37) in einer Längsachse der Bohrung (7) angeordnet ist.7. Fuel injection valve according to claim 6, characterized in that none of the spray holes (37) is arranged in a longitudinal axis of the bore (7).
8. Brennstoffeinspritzventil nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Abspritzlöcher (37) konisch ausgebildet sind.8. Fuel injection valve according to claim 6 or 7, characterized in that the spray holes (37) are conical.
9. Brennstoffeinspritzventil nach Anspruch 8, dadurch gekennzeichnet, daß sich diε Abspritzlöcher (37) in Strömungsrichtung des Brennstoffs verjüngen.9. Fuel injection valve according to claim 8, characterized in that diε spray holes (37) taper in the flow direction of the fuel.
10. Brennstoffeinspritzventil nach Anspruch 9, dadurch gekennzeichnet, daß diε Abspritzlöcher (37) Zulaufseitig einen trichterförmigen Zuströmbereich (42) aufweisen.10. Fuel injection valve according to claim 9, characterized in that diε spray holes (37) on the inlet side have a funnel-shaped inflow region (42).
11. Brennstoffeinspritzventil nach Anspruch 10, dadurch gekennzeichnet, daß die Abspritzlöcher (37) abströmseitig scharfe Kanten (41) aufweisen.11. The fuel injector according to claim 10, characterized in that the spray holes (37) have sharp edges (41) on the outflow side.
12. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis12. Fuel injection valve according to one of claims 1 to
11, dadurch gekennzeichnet, daß zwischen der Spritzlochscheibe (36) und einer Stirnseite (40) des Ventilsitzkörpers (5) ein Volumen (39) ausgebildet ist. 11, characterized in that a volume (39) is formed between the spray orifice plate (36) and an end face (40) of the valve seat body (5).
EP02737742A 2001-04-11 2002-03-16 Fuel injection valve Expired - Lifetime EP1379778B1 (en)

Applications Claiming Priority (3)

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DE10118164A DE10118164B4 (en) 2001-04-11 2001-04-11 Fuel injector
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PCT/DE2002/000966 WO2002084113A1 (en) 2001-04-11 2002-03-16 Fuel injection valve

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Also Published As

Publication number Publication date
EP1379778B1 (en) 2010-05-19
DE10118164B4 (en) 2007-02-08
JP2004518910A (en) 2004-06-24
DE50214442D1 (en) 2010-07-01
KR20030007944A (en) 2003-01-23
CN1461382A (en) 2003-12-10
WO2002084113A1 (en) 2002-10-24
US20040011894A1 (en) 2004-01-22
DE10118164A1 (en) 2002-10-24

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