EP1066469B1 - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
EP1066469B1
EP1066469B1 EP99957939A EP99957939A EP1066469B1 EP 1066469 B1 EP1066469 B1 EP 1066469B1 EP 99957939 A EP99957939 A EP 99957939A EP 99957939 A EP99957939 A EP 99957939A EP 1066469 B1 EP1066469 B1 EP 1066469B1
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EP
European Patent Office
Prior art keywords
fuel injection
connecting means
injection device
connection piece
fuel
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 - Lifetime
Application number
EP99957939A
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German (de)
French (fr)
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EP1066469A1 (en
Inventor
Martin Andorfer
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44

Definitions

  • the invention is based on a fuel injection device according to the genus of the main claim.
  • Fuel injection devices are already from a number of publications known to have a fuel rail have on which several connecting pieces for one Installation of fuel injectors are provided. Usually become safe and possibly non-rotating installation of the fuel injectors in the Connecting pieces additional connecting elements used, that act like clips or clasps in the connection area.
  • Such connecting elements include from DE-OS 34 28 597 a U-shaped spring clip, from DE-OS 39 04 479 a C-shaped plastic clip, from DE-OS 39 18 410 U-shaped spring clip, also from DE-OS 40 17 875 a U-shaped spring clip, from DE-OS 44 13 914 lockable, two-leg plastic clip, from the US PS 4,823,754 a U-shaped mounting bracket and from the US-PS 5,035,224 a U-shaped spring clip is known.
  • a fuel injector according to the preamble of claim 1 only US-A-5 724 946 is known.
  • the fuel injection device according to the invention with the characteristic features of the main claim has the Advantage that in a simple way a firm and Safe connection of fuel injectors Connection piece of fuel distributors is made possible. There are none to fix the fuel injectors additional clip-like or clasp-like Fasteners required. In this way, one very easy assembly and disassembly guaranteed.
  • the fuel injection device is advantageous designed such that due to interruptions in the end section of the connecting piece under radial Tension whose connecting means radially effective in the depressed corresponding lanyard.
  • FIG. 1 shows a partially illustrated fuel injector, figure 2 a first training variant of a connecting piece as a section along the line II-II in Figure 1, Figure 3 a second training variant of a connecting piece as a section along the line III-III in Figure 1, Figure 4 a third training variant of a connecting piece as a section along the line IV-IV in Figure 1 and Figure 5 a schematic and partially broken side view the connecting piece.
  • the fuel injector partially shown in Figure 1 for internal combustion engines has one Fuel distributor 10 made of plastic or aluminum, which carries a plurality of connecting pieces 11. According to the number of connecting pieces 11 are in the same number of fuel injection valves 12 are provided, which with their inlet ends in Project supply openings 13 of the connecting pieces 11.
  • the fuel injectors 12 are therefore as so-called top feed injectors.
  • the number of connecting pieces 11 and Fuel injection valves 12 depends on the number of cylinder to be supplied to the internal combustion engine. At a four-cylinder internal combustion engines are, for example, four Fuel injectors 12 are provided, each in one of four connecting pieces 11 of the fuel distributor 10 liquid-tight using an upper sealing ring 14 are used.
  • a liquid tight Installation of the fuel injector 12 is done here ensures a lower sealing ring 18.
  • usable fuel injection valves 12 is e.g. to electromagnetically actuated valves or around with piezo actuators or magnetostrictive actuators operated valves.
  • the supply opening 13 of the connecting piece 11 is e.g. stepped, the supply opening 13 a smaller diameter near a distributor opening 20 of the Fuel distributor 10 has as in one Fuel injector 12 encompassing area 21 of the Connection piece 11.
  • the outer diameter of the Connection piece 11 is constant over its entire length.
  • Connector 11 is at least a hook-shaped Connection means 22 formed.
  • This at least one Connection means 22 engages in a corresponding one Recessing connecting means 23 on the outer Scope of the fuel injector 12.
  • This recessed connecting means 23 for example around a circumferential groove in the Plastic injection molding of the fuel injector 12.
  • Figure 2 shows a first embodiment of a Connection piece 11 as a section along the line II-II in Figure 1, while Figure 3 is a second and Figure 4 is a third training variant of a connecting piece 11 as a section along the line III-III or line IV-IV clarify in Figure 1.
  • Figure 4 is a third training variant of a connecting piece 11 as a section along the line III-III or line IV-IV clarify in Figure 1.
  • the sectional representations it is only the cut connecting piece 11 without the fuel injector 12 insertable therein.
  • FIGs 2 and 3 are two examples of a two-part connecting means 22a, 22b shown. Diametrically opposite are two in cross section hook-shaped and each about 80 ° (Figure 2) in Connecting means 22a, 22b extending circumferentially intended.
  • the connecting means 22a, 22b can, however just as well in an angular range from 20 ° to 120 ° extend.
  • When using such a trained Connection piece 11 can be the corresponding Connection means 23 of the fuel injection valve 12 also be shared.
  • the connecting means 22a, 22b in two groove-shaped or slit-like, but non-rotating connection means 23 am Intervene fuel injector 12. That way given a very simple anti-twist device.
  • the two connecting means 22a, 22b do not have to be one have the same extension. Will the Connecting means 22a, 22b and the corresponding ones Connection means 23 of different sizes, as it is FIG. 3 shows an often desirable result clear installation position of the fuel injector 12 in Connection piece 11. This way is without additional Design means ensures that exactly one you want Installation position is realized.
  • the connecting means 22 can also consist of more than two parts consist; three to eight connecting means 22a, 22b can also make sense.
  • the lanyard 22 ' can also be designed in one piece, as in FIG. 4 can be seen.
  • the connecting means extends 22 ', however, in no case in the circumferential direction over 360 °, but for example over an angular range of 240 ° to 320 °.
  • connection piece 11 in the fuel distributor 10 facing away and facing the connecting means 22, 22 ' End section 25 with at least one interruption 26 provided that a slight radial spreading of the Connection 11 allowed.
  • connecting pieces 11 which have two interruptions 26 which are exactly diametrical are opposite. In this way, two segments of the End section 25, in the middle of each Connection means 22 are arranged. The end section 25 however, e.g. also with three to eight interruptions 26 be trained, so that then three to eight There are segments of the end section 25, in turn three to eight connecting means 22 are executed.
  • Figure 4 shows an example of a Connection piece 11 with only one interruption 26.
  • the interruptions 26 are slot-like, for example executed, the axial length of the breaks 26th is limited.
  • the interruptions are ideally 26 only run so long that it is in the installed state of the Fuel injector 12 in the connector 11 first start downstream of the upper sealing ring 14 and up extend towards the connecting means 22, 22 '.
  • the Interruptions 26 are therefore only immediately in the lower End portion 25 of the connecting piece 11 introduced so a complete seal through the upper sealing ring 14 is guaranteed. This configuration is shown in FIG a schematic and partially broken side view of the connecting piece 11 illustrated.
  • the inner one Supply opening 13 in the area 21 or the upper sealing ring 14 have diameters, of which at least one Connecting means 22, 22 'further inwards towards a valve longitudinal axis 28 protrudes so that the sealing ring 14 viewed indirectly over a certain axial distance from the connecting means 22, 22 'is engaged.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Brennstoffeinspritzvorrichtung nach der Gattung des Hauptanspruchs.The invention is based on a fuel injection device according to the genus of the main claim.

Aus einer Reihe von Druckschriften sind bereits Brennstoffeinspritzvorrichtungen bekannt, die einen Brennstoffverteiler aufweisen, an dem mehrere Anschlussstutzen für einen Einbau von Brennstoffeinspritzventilen vorgesehen sind. Üblicherweise werden zum sicheren und eventuell verdrehsicheren Einbau der Brennstoffeinspritzventile in den Anschlussstutzen zusätzliche Verbindungselemente eingesetzt, die klammer- oder spangenartig im Verbindungsbereich wirken. Als derartige Verbindungselemente sind u.a. aus der DE-OS 34 28 597 eine U-förmige Federklammer, aus der DE-OS 39 04 479 ein C-förmiger Kunststoffclip, aus der DE-OS 39 18 410 eine U-förmige Federklammer, aus der DE-OS 40 17 875 ebenfalls eine U-förmige Federklammer, aus der DE-OS 44 13 914 ein verrastbarer, zweischenkliger Kunststoffclip, aus der US-PS 4,823,754 eine U-förmige Befestigungsklammer und aus der US-PS 5,035,224 eine U-förmige Federklammer bekannt. Alle vorerwähnten Brennstoffeinspritzvorrichtungen zeichnen sich dadurch aus, dass einerseits das Verbindungselement in einer Vertiefung des Brennstoffeinspritzventils eingreift und andererseits ein in irgendeiner Weise am Anschlussstutzen des Brennstoffverteilers radial nach außen stehendes Rastelement vom Verbindungselement umgriffen wird.Fuel injection devices are already from a number of publications known to have a fuel rail have on which several connecting pieces for one Installation of fuel injectors are provided. Usually become safe and possibly non-rotating installation of the fuel injectors in the Connecting pieces additional connecting elements used, that act like clips or clasps in the connection area. Such connecting elements include from DE-OS 34 28 597 a U-shaped spring clip, from DE-OS 39 04 479 a C-shaped plastic clip, from DE-OS 39 18 410 U-shaped spring clip, also from DE-OS 40 17 875 a U-shaped spring clip, from DE-OS 44 13 914 lockable, two-leg plastic clip, from the US PS 4,823,754 a U-shaped mounting bracket and from the US-PS 5,035,224 a U-shaped spring clip is known. All The aforementioned fuel injectors stand out characterized in that on the one hand the connecting element in a Engages recess of the fuel injector and on the other hand, one in some way on the connecting piece of the fuel distributor standing radially outwards Locking element is encompassed by the connecting element.

Bekannt sind des weiteren Brennstoffeinspritzvorrichtungen, bei denen auf zusätzliche Verbindungselemente im Verbindungsbereich von Brennstoffeinspritzventil und Anschlussstutzen des Brennstoffverteilers verzichtet wird, wobei bei solchen Brennstoffeinspritzvorrichtungen an den Umfängen der Brennstoffeinspritzventile entweder Schnappfedern (DE-OS 39 19 231) oder Rastnasen (DE-OS 195 46 441) vorgesehen sind. Die Schnappfedern umgreifen dabei einen am Anschlussstutzen des Brennstoffverteilers radial nach außen stehenden Verriegelungsbund, während die Rastnasen in fensterartigen Ausnehmungen des verlängerten Anschlussstutzens einrasten.Also known are fuel injection devices, where on additional fasteners in Connection area of fuel injector and Connecting piece of the fuel distributor is dispensed with, with such fuel injectors to the Include the fuel injectors either Snap springs (DE-OS 39 19 231) or locking lugs (DE-OS 195 46 441) are provided. The snap springs embrace it one radially at the connecting piece of the fuel distributor outward locking collar, while the Lugs in window-like recesses of the extended Snap the connector into place.

Eine Brennstoffeinspritzvorrichtang gemäß Oberbegriff von Anspruch 1 ist nur der US-A-5 724 946 bekannt.A fuel injector according to the preamble of claim 1 only US-A-5 724 946 is known.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Brennstoffeinspritzvorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat den Vorteil, dass auf einfache Art und Weise eine feste und sichere Verbindung von Brennstoffeinspritzventilen in Anschlussstutzen von Brennstoffverteilern ermöglicht ist. Zur Fixierung der Brennstoffeinspritzventile sind keine zusätzlichen klammer- oder spangenartigen Verbindungselemente erforderlich. Auf diese Weise wird eine sehr einfache Montage und auch Demontage garantiert.The fuel injection device according to the invention with the characteristic features of the main claim has the Advantage that in a simple way a firm and Safe connection of fuel injectors Connection piece of fuel distributors is made possible. There are none to fix the fuel injectors additional clip-like or clasp-like Fasteners required. In this way, one very easy assembly and disassembly guaranteed.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Brennstoffeinspritzvorrichtung möglich. By the measures listed in the subclaims advantageous developments and improvements in Main claim specified fuel injector possible.

In besonders vorteilhafter Weise ist durch einfachste Maßnahmen bei der Ausbildung der korrespondierenden Verbindungsmittel von Anschlussstutzen und Brennstoffeinspritzventil eine Verdrehsicherung des Brennstoffeinspritzventils erreichbar. Außerdem ist es sehr einfach gestaltbar, dass eine gewünschte eindeutige Einbaulage des Ventils erzielbar ist. Dazu müssen beispielsweise nur zwei Verbindungsmittel des Anschlussstutzens unterschiedlich groß ausgeführt werden, die dann in ebenfalls zwei unterschiedlich große entsprechend korrespondierende Verbindungsmittel des Brennstoffeinspritzventils einrasten.In a particularly advantageous way is by simplest Measures in the training of the corresponding Connection means of connecting pieces and Fuel injection valve an anti-rotation of the Fuel injector accessible. It's also very easily designable that a desired unique Installation position of the valve can be achieved. To do this for example, only two connecting means of the Connecting pieces of different sizes, which then also in two different sizes corresponding corresponding connection means of Snap the fuel injector into place.

In vorteilhafter Weise ist die Brennstoffeinspritzvorrichtung derart ausgestaltet, dass aufgrund von Unterbrechungen im Endabschnitt des Anschlussstutzens dieser unter radialer Spannung dessen Verbindungsmittel radial wirksam in die vertieften korrespondierenden Verbindungsmittel drückt.The fuel injection device is advantageous designed such that due to interruptions in the end section of the connecting piece under radial Tension whose connecting means radially effective in the depressed corresponding lanyard.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 eine teilweise dargestellte Brennstoffeinspritzvorrichtung, Figur 2 eine erste Ausbildungsvariante eines Anschlussstutzens als einen Schnitt entlang der Linie II-II in Figur 1, Figur 3 eine zweite Ausbildungsvariante eines Anschlussstutzens als einen Schnitt entlang der Linie III-III in Figur 1, Figur 4 eine dritte Ausbildungsvariante eines Anschlussstutzens als einen Schnitt entlang der Linie IV-IV in Figur 1 und Figur 5 eine schematische und teilweise aufgebrochene Seitenansicht des Anschlussstutzens.Embodiments of the invention are in the drawing shown in simplified form and in the following Description explained in more detail. 1 shows a partially illustrated fuel injector, figure 2 a first training variant of a connecting piece as a section along the line II-II in Figure 1, Figure 3 a second training variant of a connecting piece as a section along the line III-III in Figure 1, Figure 4 a third training variant of a connecting piece as a section along the line IV-IV in Figure 1 and Figure 5 a schematic and partially broken side view the connecting piece.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die in Figur 1 teilweise dargestellte Brennstoffeinspritzvorrichtung für Brennkraftmaschinen weist einen Brennstoffverteiler 10 aus Kunststoff oder Aluminium auf, der eine Mehrzahl von Anschlussstutzen 11 trägt. Entsprechend der Anzahl der Anschlussstutzen 11 sind in gleicher Anzahl Brennstoffeinspritzventile 12 vorgesehen, die mit ihren zulaufseitigen oberen Enden in Versorgungsöffnungen 13 der Anschlussstutzen 11 hineinragen. Die Brennstoffeinspritzventile 12 sind demzufolge als sogenannte Top-Feed-Injektoren ausgeführt.The fuel injector partially shown in Figure 1 for internal combustion engines has one Fuel distributor 10 made of plastic or aluminum, which carries a plurality of connecting pieces 11. According to the number of connecting pieces 11 are in the same number of fuel injection valves 12 are provided, which with their inlet ends in Project supply openings 13 of the connecting pieces 11. The fuel injectors 12 are therefore as so-called top feed injectors.

Die Anzahl der Anschlussstutzen 11 und der Brennstoffeinspritzventile 12 richtet sich nach der Zahl der zu versorgenden Zylinder der Brennkraftmaschine. Bei einer vierzylindrigen Brennkraftmaschine sind beispielsweise vier Brennstoffeinspritzventile 12 vorgesehen, die jeweils in einem von vier Anschlussstutzen 11 des Brennstoffverteilers 10 mit Hilfe eines oberen Dichtrings 14 flüssigkeitsdicht eingesetzt sind.The number of connecting pieces 11 and Fuel injection valves 12 depends on the number of cylinder to be supplied to the internal combustion engine. At a four-cylinder internal combustion engines are, for example, four Fuel injectors 12 are provided, each in one of four connecting pieces 11 of the fuel distributor 10 liquid-tight using an upper sealing ring 14 are used.

Mit seinem abspritzseitigen Ende ragt das Brennstoffeinspritzventil 12 in eine Aufnahmebohrung 16 eines Zylinderkopfes 17 (Direkteinspritzung) oder eines an einem Ansaugrohr ausgebildeten Aufnahmestutzens 17 (Saugrohreinspritzung) hinein. Ein flüssigkeitsdichter Einbau des Brennstoffeinspritzventils 12 wird hier durch einen unteren Dichtring 18 gewährleistet.With its end on the spray side, this protrudes Fuel injection valve 12 in a receiving bore 16 a cylinder head 17 (direct injection) or one an intake manifold 17 (Intake manifold injection). A liquid tight Installation of the fuel injector 12 is done here ensures a lower sealing ring 18.

Bei den in der erfindungsgemäßen Brennstoffeinspritzvorrichtung einsetzbaren Brennstoffeinspritzventilen 12 handelt es sich z.B. um elektromagnetisch betätigbare Ventile oder um mit Piezoaktoren oder magnetostriktiven Aktoren betriebene Ventile. In the fuel injector according to the invention usable fuel injection valves 12 is e.g. to electromagnetically actuated valves or around with piezo actuators or magnetostrictive actuators operated valves.

Die Versorgungsöffnung 13 des Anschlussstutzens 11 ist z.B. gestuft ausgeführt, wobei die Versorgungsöffnung 13 einen geringeren Durchmesser nahe einer Verteileröffnung 20 des Brennstoffverteilers 10 besitzt als in einem das Brennstoffeinspritzventil 12 umgreifenden Bereich 21 des Anschlussstutzens 11. Der Außendurchmesser des Anschlussstutzens 11 ist über seine gesamte Länge konstant. Zur Befestigung des Brennstoffeinspritzventils 12 in der Versorgungsöffnung 13 des Anschlussstutzens 11 sind das Brennstoffeinspritzventil 12 und der Anschlussstutzen 11 mit miteinander korrespondierenden Verbindungsmitteln 22, 23 versehen.The supply opening 13 of the connecting piece 11 is e.g. stepped, the supply opening 13 a smaller diameter near a distributor opening 20 of the Fuel distributor 10 has as in one Fuel injector 12 encompassing area 21 of the Connection piece 11. The outer diameter of the Connection piece 11 is constant over its entire length. To attach the fuel injector 12 in the Supply opening 13 of the connecting piece 11 are Fuel injector 12 and the connecting piece 11 with interconnecting means 22, 23 Mistake.

Am der Verteileröffnung 20 entfernt liegenden Ende des Anschlussstutzens 11 ist wenigstens ein hakenförmiges Verbindungsmittel 22 ausgebildet. Dieses wenigstens eine Verbindungsmittel 22 greift in ein korrespondierendes, eine Vertiefung darstellendes Verbindungsmittel 23 am äußeren Umfang des Brennstoffeinspritzventils 12 ein. Bei diesem vertieften Verbindungsmittel 23 handelt es sich beispielsweise um eine umlaufende Nut in der Kunststoffumspritzung des Brennstoffeinspritzventils 12. Im Gegensatz zu allen bekannten Vorrichtungen ragen die an dem Anschlussstutzen 11 ausgebildeten Verbindungsmittel 22 der erfindungsgemäßen Brennstoffeinspritzvorrichtung radial nach innen in die Versorgungsöffnung 13 hinein.At the distal end of the distributor opening 20 Connector 11 is at least a hook-shaped Connection means 22 formed. This at least one Connection means 22 engages in a corresponding one Recessing connecting means 23 on the outer Scope of the fuel injector 12. With this recessed connecting means 23 for example around a circumferential groove in the Plastic injection molding of the fuel injector 12. Im Contrary to all known devices that protrude from the Connection piece 11 formed connection means 22 of the Fuel injection device according to the invention radially after inside into the supply opening 13.

Figur 2 zeigt eine erste Ausbildungsvariante eines Anschlussstutzens 11 als einen Schnitt entlang der Linie II-II in Figur 1, während Figur 3 eine zweite und Figur 4 ein dritte Ausbildungsvariante eines Anschlussstutzens 11 als einen Schnitt entlang der Linie III-III bzw. der Linie IV-IV in Figur 1 verdeutlichen. Bei den Schnittdarstellungen handelt es sich nur um den geschnittenen Anschlussstutzen 11 ohne das in ihn einführbare Brennstoffeinspritzventil 12. Figure 2 shows a first embodiment of a Connection piece 11 as a section along the line II-II in Figure 1, while Figure 3 is a second and Figure 4 is a third training variant of a connecting piece 11 as a section along the line III-III or line IV-IV clarify in Figure 1. In the sectional representations it is only the cut connecting piece 11 without the fuel injector 12 insertable therein.

In den Figuren 2 und 3 sind zwei Beispiele für ein zweigeteiltes Verbindungsmittel 22a, 22b dargestellt. Diametral gegenüberliegend sind zwei im Querschnitt hakenförmige und jeweils sich ca. 80° (Figur 2) in Umfangsrichtung erstreckende Verbindungsmittel 22a, 22b vorgesehen. Die Verbindungsmittel 22a, 22b können sich aber genausogut in einem Winkelbereich von 20° bis 120° erstrecken. Beim Einsatz eines derartig ausgebildeten Anschlussstutzens 11 kann das korrespondierende Verbindungsmittel 23 des Brennstoffeinspritzventils 12 ebenfalls geteilt sein. So können die Verbindungsmittel 22a, 22b in zwei nutförmig oder schlitzartig ausgebildete, aber nicht umlaufende Verbindungsmittel 23 am Brennstoffeinspritzventil 12 eingreifen. Auf diese Weise ist eine sehr einfache Verdrehsicherung gegeben.In Figures 2 and 3 are two examples of a two-part connecting means 22a, 22b shown. Diametrically opposite are two in cross section hook-shaped and each about 80 ° (Figure 2) in Connecting means 22a, 22b extending circumferentially intended. The connecting means 22a, 22b can, however just as well in an angular range from 20 ° to 120 ° extend. When using such a trained Connection piece 11 can be the corresponding Connection means 23 of the fuel injection valve 12 also be shared. The connecting means 22a, 22b in two groove-shaped or slit-like, but non-rotating connection means 23 am Intervene fuel injector 12. That way given a very simple anti-twist device.

Die beiden Verbindungsmittel 22a, 22b müssen keineswegs eine gleich große Erstreckung besitzen. Werden die Verbindungsmittel 22a, 22b und die korrespondierenden Verbindungsmittel 23 unterschiedlich groß ausgeführt, wie es Figur 3 zeigt, ergibt sich eine oft wünschenswerte eindeutige Einbaulage des Brennstoffeinspritzventils 12 im Anschlussstutzen 11. Auf diese Weise ist ohne zusätzliche Gestaltungsmittel gewährleistet, dass genau eine gewünschte Einbauposition realisiert wird.The two connecting means 22a, 22b do not have to be one have the same extension. Will the Connecting means 22a, 22b and the corresponding ones Connection means 23 of different sizes, as it is FIG. 3 shows an often desirable result clear installation position of the fuel injector 12 in Connection piece 11. This way is without additional Design means ensures that exactly one you want Installation position is realized.

Das Verbindungsmittel 22 kann auch aus mehr als zwei Teilen bestehen; drei bis acht Verbindungsmittel 22a, 22b können ebenfalls sinnvoll sein. Andererseits ist das Verbindungsmittel 22' auch einteilig gestaltbar, wie Figur 4 zu entnehmen ist. Dabei erstreckt sich das Verbindungsmittel 22' jedoch auf keinen Fall in Umfangsrichtung über 360°, sondern beispielsweise über einen Winkelbereich von 240° bis 320°. The connecting means 22 can also consist of more than two parts consist; three to eight connecting means 22a, 22b can also make sense. On the other hand is the lanyard 22 'can also be designed in one piece, as in FIG. 4 can be seen. The connecting means extends 22 ', however, in no case in the circumferential direction over 360 °, but for example over an angular range of 240 ° to 320 °.

Ebenso wie das Verbindungsmittel 22, 22' wenigstens an einer Stelle unterbrochen sein muß bzw. nicht um 360° umlaufen darf, ist es für eine Montage des Brennstoffeinspritzventils 12 im Anschlussstutzen 11 notwendig, dass dieser zumindest im Bereich der Verbindungsmittel 22, 22' ebenfalls nicht über 360° umlaufend ausgebildet ist. Vielmehr ist der Anschlussstutzen 11 in seinem dem Brennstoffverteiler 10 abgewandten und den Verbindungsmitteln 22, 22' zugewandten Endabschnitt 25 mit wenigstens einer Unterbrechung 26 versehen, die ein geringfügiges radiales Aufspreizen des Anschlussstutzens 11 erlaubt.Just like the connecting means 22, 22 'at least on one Point must be interrupted or not run through 360 ° it is for mounting the fuel injector 12 in the connecting piece 11 necessary that this at least likewise not in the area of the connecting means 22, 22 ' is circumferential over 360 °. Rather, it is Connection piece 11 in the fuel distributor 10 facing away and facing the connecting means 22, 22 ' End section 25 with at least one interruption 26 provided that a slight radial spreading of the Connection 11 allowed.

In den Figuren 2 und 3 sind Anschlussstutzen 11 dargestellt, die zwei Unterbrechungen 26 aufweisen, die genau diametral gegenüberliegen. Auf diese Weise entstehen zwei Segmente des Endabschnitts 25, in deren Mitte jeweils die Verbindungsmittel 22 angeordnet sind. Der Endabschnitt 25 kann jedoch z.B. auch mit drei bis acht Unterbrechungen 26 ausgebildet sein, so dass dann entsprechend drei bis acht Segmente des Endabschnitts 25 vorliegen, an denen wiederum drei bis acht Verbindungsmittel 22 ausgeführt sind. Im Gegensatz dazu zeigt Figur 4 ein Beispiel für einen Anschlussstutzen 11 mit nur einer Unterbrechung 26.In the figures 2 and 3 connecting pieces 11 are shown, which have two interruptions 26 which are exactly diametrical are opposite. In this way, two segments of the End section 25, in the middle of each Connection means 22 are arranged. The end section 25 however, e.g. also with three to eight interruptions 26 be trained, so that then three to eight There are segments of the end section 25, in turn three to eight connecting means 22 are executed. in the In contrast, Figure 4 shows an example of a Connection piece 11 with only one interruption 26.

Die Unterbrechungen 26 sind beispielsweise schlitzartig ausgeführt, wobei die axiale Länge der Unterbrechungen 26 begrenzt ist. In idealer Weise sind die Unterbrechungen 26 nur so lang ausgeführt, dass sie im eingebauten Zustand des Brennstoffeinspritzventils 12 im Anschlussstutzen 11 erst stromabwärts des oberen Dichtrings 14 beginnen und sich bis hin zu den Verbindungsmitteln 22, 22' erstrecken. Die Unterbrechungen 26 sind also nur unmittelbar im unteren Endabschnitt 25 des Anschlussstutzens 11 eingebracht, damit eine vollständige Abdichtung durch den oberen Dichtring 14 garantiert ist. In Figur 5 wird diese Ausgestaltung durch eine schematische und teilweise aufgebrochene Seitenansicht des Anschlussstutzens 11 veranschaulicht. Die innere Versorgungsöffnung 13 im Bereich 21 bzw. der obere Dichtring 14 weisen Durchmesser auf, von denen aus das wenigstens eine Verbindungsmittel 22, 22' weiter nach innen in Richtung zu einer Ventillängsachse 28 ragt, so dass der Dichtring 14 indirekt über einen gewissen axialen Abstand betrachtet von den Verbindungsmitteln 22, 22' untergriffen wird.The interruptions 26 are slot-like, for example executed, the axial length of the breaks 26th is limited. The interruptions are ideally 26 only run so long that it is in the installed state of the Fuel injector 12 in the connector 11 first start downstream of the upper sealing ring 14 and up extend towards the connecting means 22, 22 '. The Interruptions 26 are therefore only immediately in the lower End portion 25 of the connecting piece 11 introduced so a complete seal through the upper sealing ring 14 is guaranteed. This configuration is shown in FIG a schematic and partially broken side view of the connecting piece 11 illustrated. The inner one Supply opening 13 in the area 21 or the upper sealing ring 14 have diameters, of which at least one Connecting means 22, 22 'further inwards towards a valve longitudinal axis 28 protrudes so that the sealing ring 14 viewed indirectly over a certain axial distance from the connecting means 22, 22 'is engaged.

Claims (13)

  1. Fuel injection device for an internal combustion engine, with a fuel distributor (10) which has a plurality of connection pieces (11) for the liquid-tight reception of fuel injection valves (12), with at least one first connecting means (22, 22') on each connection piece (11) and with at least one second connecting means (23) on each fuel injection valve (12), the first and the second connecting means (22, 22', 23) matching with one another in order to achieve a secure connection, the at least one first connecting means (22, 22') on at least one connection piece (11) projecting radially inwards, and the at least one second connecting means (23) on at least one fuel injection valve (12) being designed as a depression, characterized in that the connection piece (11), in an end portion (25) having the at least one first connecting means (22, 22'), is produced with at least one interruption (26).
  2. Fuel injection device according to Claim 1, characterized in that the at least one first connecting means (22, 22') is designed in the form of a latching hook.
  3. Fuel injection device according to Claim 1 or 2, characterized in that the first connecting means (22) is divided in two (22a, 22b).
  4. Fuel injection device according to Claim 3, characterized in that the connecting means (22a, 22b) extend in the circumferential direction in each case over an angular range of between 20° and 120°.
  5. Fuel injection device according to Claim 3 or 4, characterized in that the two connecting means (22a, 22b) possess a circumferential extent of equal size or a different size.
  6. Fuel injection device according to Claim 1 or 2, characterized in that three to eight first connecting means (22) are formed on the connection piece (11).
  7. Fuel injection device according to Claim 1 or 2, characterized in that only one first connecting means (22') is provided on the connection piece (11) and extends in the circumferential direction over an angular range of between 240° and 320°.
  8. Fuel injection device according to Claim 1, characterized in that the number of interruptions (26) in the connection piece (11) is equal to the number of the first connecting means (22, 22') on the connection piece (11).
  9. Fuel injection device according to one of the preceding claims, characterized in that the at least one interruption (26) is of slot-like design.
  10. Fuel injection device according to Claim 1 or 9, characterized in that the fuel injection valve (12) projects with its inflow-side end into an inner supply orifice (13) of the connection piece (11) and the fuel injection valve (12) has an upper sealing ring (14) which serves for sealing off in the supply orifice (13) with respect to the connection piece (11), and the at least one interruption (26) runs only downstream of the sealing ring (14),
  11. Fuel injection device according to Claim 1, characterized in that the fuel injection valve (12) projects with its inflow-side end into an inner supply orifice (13) of the connection piece (11) and the fuel injection valve (12) has an upper sealing ring (14) which serves for sealing off in the supply orifice (13) with respect to the connection piece (11), and the supply orifice (13) and the sealing ring (14) have a diameter from which the at least one first connecting means (22, 22') projects further inwards in the direction of a valve longitudinal axis (28).
  12. Fuel injection device according to one of the preceding claims, characterized in that the second connecting means (23) is designed in the form of a circumferential groove.
  13. Fuel injection device according to one of Claims 1 to 11, characterized in that the number of the first connecting means (22, 22') on the connection piece (11) is equal to the number of the second connecting means (23) on the fuel injection valve (12).
EP99957939A 1999-01-21 1999-10-28 Fuel injection device Expired - Lifetime EP1066469B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19902186 1999-01-21
DE19902186A DE19902186A1 (en) 1999-01-21 1999-01-21 Fuel injection device for internal combustion engine, connector of which has at least one connection projecting radially inwards
PCT/DE1999/003450 WO2000043668A1 (en) 1999-01-21 1999-10-28 Fuel injection device

Publications (2)

Publication Number Publication Date
EP1066469A1 EP1066469A1 (en) 2001-01-10
EP1066469B1 true EP1066469B1 (en) 2004-10-13

Family

ID=7894880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99957939A Expired - Lifetime EP1066469B1 (en) 1999-01-21 1999-10-28 Fuel injection device

Country Status (8)

Country Link
US (1) US6491026B1 (en)
EP (1) EP1066469B1 (en)
JP (1) JP2002535550A (en)
KR (1) KR20010086261A (en)
BR (1) BR9908987A (en)
DE (2) DE19902186A1 (en)
ES (1) ES2233087T3 (en)
WO (1) WO2000043668A1 (en)

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EP1793122B1 (en) * 2005-12-02 2010-10-27 Continental Automotive GmbH Fuel injector assembly
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EP2083167B1 (en) * 2008-01-23 2017-05-10 Continental Automotive GmbH Coupling arrangement and connection assembly
EP2093413B1 (en) * 2008-02-19 2011-01-12 Continental Automotive GmbH Coupling device
EP2093412B1 (en) * 2008-02-19 2011-01-19 Continental Automotive GmbH Coupling device
DE102008055105A1 (en) * 2008-12-22 2010-07-01 Robert Bosch Gmbh Fuel injection device
JP4692663B2 (en) * 2009-03-31 2011-06-01 株式会社デンソー connector

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Also Published As

Publication number Publication date
EP1066469A1 (en) 2001-01-10
KR20010086261A (en) 2001-09-10
DE59910842D1 (en) 2004-11-18
DE19902186A1 (en) 2000-07-27
US6491026B1 (en) 2002-12-10
ES2233087T3 (en) 2005-06-01
JP2002535550A (en) 2002-10-22
BR9908987A (en) 2000-12-12
WO2000043668A1 (en) 2000-07-27

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