EP1047870B1 - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
EP1047870B1
EP1047870B1 EP99950456A EP99950456A EP1047870B1 EP 1047870 B1 EP1047870 B1 EP 1047870B1 EP 99950456 A EP99950456 A EP 99950456A EP 99950456 A EP99950456 A EP 99950456A EP 1047870 B1 EP1047870 B1 EP 1047870B1
Authority
EP
European Patent Office
Prior art keywords
housing body
valve seat
stroke
side end
seat support
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
EP99950456A
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German (de)
French (fr)
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EP1047870A1 (en
Inventor
Andreas Eichendorf
Thomas Sebastian
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1047870A1 publication Critical patent/EP1047870A1/en
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Publication of EP1047870B1 publication Critical patent/EP1047870B1/en
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Expired - Lifetime legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/161Means for adjusting injection-valve lift
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664Injectors 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

Definitions

  • the invention is based on a fuel injector according to the preamble of claim 1.
  • DE 196 26 576 A1 already discloses a fuel injector known according to the preamble of claim 1.
  • This fuel injector has a valve closing body, the one with a valve seat support Valve seat surface interacts to form a sealing seat.
  • the Valve closing body is located on the inside of the Valve seat carrier extending valve needle and one with the Valve needle on the opposite of the valve closing body Anchor connected at the end by means of a magnetic coil can be operated electromagnetically.
  • the valve seat support is in used a housing body and by means of a Housing body screwed threaded ring against a stroke adjusting disc preloadable between the housing body and the valve seat carrier is inserted. The stroke adjustment disc is therefore located inside the housing body.
  • the stroke adjusting disc serves the stroke of the valve closing body in the electromagnetic actuation of the Adjust fuel injector.
  • a variation of the Thickness dimension of the stroke adjustment disc leads to a Variation of the axial position of the valve seat surface. At a certain length of the valve needle and a certain position One stop surface for the armature is the valve lift established.
  • FIG. 1 A known fuel injector of a similar design is shown in Fig. 1 and will be detailed later described.
  • This design corresponds to the arrangement the stroke adjuster of those of DE 196 26 576 A1 with the difference that the valve seat support with the valve housing not through a threaded ring but is connected by a flare connection. Also this fuel injector are liable for those already described Disadvantages.
  • the fuel injector according to the invention with the features of claim 1 has the advantage that the Stroke adjustment disc due to the peripheral outside Arrangement compared to the housing body simple and inexpensive is mountable. At the same time, there is the advantage that the valve seat support against the housing body through the stroke adjusting disc due to the relatively large diameter the stroke adjusting disc against tilting is secured.
  • the stroke adjusting disc is preferably in a rotating one Groove of the housing body can be used and lies on an inlet side End face on the housing body and on one spray-side end face on a peripheral circumferential Protrusion of the valve seat body.
  • the connection between the housing body and the stroke adjusting disc on the one hand and between the stroke adjusting disc with the valve seat support on the other hand, a weld seam can then be used respectively.
  • the stroke adjuster not only has that Function, the axial position of the valve seat carrier opposite to determine the housing body and thus the valve stroke, but also the function of a connecting element between the housing body and the valve seat carrier.
  • the weld seams is preferably a weld shrink tension caused the housing body, the stroke adjustment and biases the valve seat body against each other. Thereby the strength is particularly high.
  • valve seat body into an injection-side end of the housing body
  • these components using a seal are sealed against each other.
  • This has the advantage that the pressure of that in the fuel injector Fuel not up to the whore shim and Penetrates welds and therefore no strain on the Welds occur due to fuel pressure.
  • the connection between the valve housing and the valve seat support and the stroke setting are therefore largely independent from the fuel pressure.
  • FIG. 1 for a better understanding of the invention Fuel injector according to the prior art, so that the later description of the invention Embodiment on the invention Can restrict special features. That in Fig. 1 Fuel injector shown is used for injection of fuel, especially with a mixture compressing spark ignition internal combustion engine.
  • the fuel injector generally designated by the reference number 1 has a valve closing body 2, the with a valve seat surface formed on a valve seat body 3 4 interacts to form a sealing seat.
  • the valve closing body 2 is via a valve needle 5 with an anchor 6 connected.
  • the armature 6 is connected by means of a magnetic coil 7 an axial force component so acted that the Valve closing body 2 lifts off the valve seat surface 4 and a spray opening 8 releases.
  • After switching off the Solenoid 7 exciting electrical excitation current is the valve closing body 2 by one acting on the armature 6
  • Return spring 9 back into its closed position recycled.
  • the bias of the return spring 9 is over one by means of a thread with a first housing body 11 connected adjusting sleeve 10 adjustable.
  • the fuel flows through a fuel inlet opening 12 and a fuel filter 13 in an axial longitudinal bore 14 of the first Housing body 11 and further via an axial longitudinal bore 15 of the adjusting sleeve 10 and a longitudinal bore 16 of the Armature 6 and a longitudinal bore 17 one even closer descriptive stroke adjusting disk 18 in a longitudinal bore 19 of the valve seat support 3 and thus arrives at that of the Valve closing body 2 formed with the valve seat surface 4 Sealing seat.
  • the first housing body 11 is made of a plastic injection molded body 20 surround, on which also a connector 21 for the electrical connection of a connecting cable the solenoid 7 is molded.
  • a second housing body 22 is provided, which with the first housing body 11 by a first crimp connection 23 is connected.
  • the second housing body 22 has a longitudinal bore 24 into which the valve seat support 3 is inserted axially and opposite by means of a seal 25 the second housing body 22 is sealed.
  • the valve seat support 3 and the second housing body 22 are by a second flange connection 30 connected together.
  • the stroke adjustment plate 18 serves to determine the valve stroke, d. H. of the stroke of the valve closing body 2 from the Valve closing surface 4 in the actuated state of the fuel injector 1.
  • the valve lift is by an in 1 not discernible slight gap between the upstream end face 28 of the armature 6 and one downstream end face 29 of the first housing body 11 established. This gap in turn results from the Length of the valve needle 5 and the armature 6, measured from the upstream end face 28 of the armature 6 to the Contact surface of the valve closing body 2 on the valve closing surface 4 of the valve seat support 3, and by the axial position of the valve seat body 3.
  • valve lift is therefore on the manufacturing tolerances of numerous components depending, in particular on the manufacturing tolerance of the Valve closing body 4, the valve needle 5, the armature 6, the Valve seat support 3 and the two housing bodies 11 and 22. Because the sum of these manufacturing tolerances is significantly larger is considered to be the required tolerance of the valve lift according to a common procedure, the valve lift measure the determining dimensions of the above components and paired a suitable stroke adjustment disc. Doing so the thickness dimension of the stroke adjustment disc is selected in this way or manufactured so that the total required valve lift within a narrow tolerance window.
  • the invention relates to an improvement in the arrangement and Forming the stroke adjusting disk 18.
  • Fig. 2 shows an embodiment of an inventive Fuel injector 1 in an excerpt, cut illustration. Only those are shown Elements essential to the invention. Around The assignment is already made easier with reference to FIG. 1 described elements with matching reference numerals Mistake.
  • the Valve stroke is through a gap 41 between the inlet side Face 28 of the armature 6 and a spray side End face 42 of a tubular portion 43 of the second housing body 22 set.
  • the tubular Section 43 has a radially protruding outward Area 44 of the second housing body 22 over a thin Connecting web 45 connected.
  • the connecting web 45 is dimensioned extremely thin to the main part of the lead magnetic flux through the armature 6 and a magnetic short circuit at the connecting web 45 avoid.
  • the armature 6 has holes 46 for the passage of fuel on.
  • the stroke adjusting disk 18 surrounds spray-side end 47 of the second housing body 22 peripheral outside.
  • the stroke adjuster 18 is preferred ring-shaped.
  • the stroke adjustment disc 18 is part of the valve housing and is in a circumferential groove 48 of the second housing body 22 used.
  • the stroke adjusting disc 18 lies with a inlet end face 49 on an opposite, associated end face 50 of the second housing body 22 in the assembled condition.
  • An end face on the spray side 51 of the stroke adjusting disk 18 lies on an opposite, associated end face 52 of the valve seat body 3 flush when assembled.
  • the end 47 of the second housing body 22 is located preferably a radial tolerance gap 54.
  • FIG. 1 An inlet-side end 55 of the valve seat body 3 is shown in FIG a receiving bore 56 of the spray-side end 47 of the second housing body 22 insertable, so that the Stroke adjuster 18 surrounded end 47 of the spray second housing body 22, the inlet end 55 of the Valve seat carrier 3 surrounds.
  • the inlet end 55 of the valve seat carrier 3 to the spray-side end 47 of the second housing body 22 by means of the rotating Seal 25 sealed.
  • Seal 25 is preferred formed as an 0-ring and in a radial groove 57 of inlet end 55 of the valve seat carrier 3 used.
  • the stroke adjusting disk 18 is by means of a first one circumferential weld seam 58 on its inlet end face 49 with the second housing body 22 and by means of a second circumferential weld seam 59 on its spray-side End face 51 welded to the valve seat support 3.
  • the Weld seams 58 and 59 are technically without Difficulties with a radially attacking from the outside Welding tool can be applied.
  • the extend Welds 58 and 59 do not extend over the entire end face 49 and 50 or 51 and 52.
  • the weld depth remains part of the flat end faces 49 and 50 on the one hand and 51 and 52 on the other hand received, so that an exact axial alignment of the valve seat support 3 with respect to the central axis 60 of the fuel injector 1 is conveyed by the stroke adjusting disk 18.
  • the invention makes targeted use of the weld seams 58 and 59 generated welding shrinkage stress.
  • the Welding shrink tension causes the second to be pre-tensioned Housing body 22, the stroke adjustment 18 and the valve seat support 3 against each other, so that a gap-free Weld seam and high strength can be achieved.
  • the setting dial 18 without Difficulties in the circumferential groove 48 of the second Housing body 22 can be used and thus a Extremely easy-to-assemble design of the fuel injector 1 results.
  • the stroke adjustment 18 in the axial bore 24 of the second housing body 22 is used be what particularly in automatic manufacturing is more difficult to handle.
  • the invention Arrangement and assembly of the stroke adjusting disk 18 insensitive to dirt.
  • the seal 25 ensures that the inside of the fuel injector 1 fuel flowing to the sealing seat does not penetrate to weld seams 58 and 59.
  • the welds 58 and 59 are therefore not with the Fuel under pressure. This is especially true with high pressure injectors essential, where a high There is a fuel pressure of up to 150 bar and still tight Tolerances of the valve lift of, for example, 0.2% are reached Need to become.
  • the weld seams 58 and 59 do not have to be Ensure tightness, but only the axial Forces between the second housing body 22 and the stroke adjusting disc 18 on the one hand and between the stroke adjusting disc 18 and the valve seat support 3 on the other take up. This allows the biasing forces during Welding can be kept low.
  • Welding the stroke adjusting disc 18 with the second housing body 22 and the valve seat support 3 is omitted of the prior art according to DE 196 26 576 A1 provided threaded ring. This saving of one component reduces manufacturing costs.
  • connection between the first housing body 11 and the second housing body 22 can by a further weld 61 take place, which are also applied on the outside can.
  • the stroke adjustment disc 18 defines the valve stroke, it forms an integral part of the valve housing and it mediates the connection between the second housing body 44 and the valve seat carrier Third
  • the invention is not based on the illustrated embodiment limited.
  • the invention Arrangement of the stroke adjusting disc 18 also with the outside opening Fuel injection valves 1 are used in the same way come.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Anspruchs 1.The invention is based on a fuel injector according to the preamble of claim 1.

Aus der DE 196 26 576 A1 ist bereits ein Brennstoffeinspritzventil nach der Gattung des Anspruchs 1 bekannt. Dieses Brennstoffeinspritzventil hat einen Ventilschließkörper, der mit einer an einem Ventilsitzträger ausgebildeten Ventilsitzfläche zu einem Dichtsitz zusammenwirkt. Der Ventilschließkörper ist über eine sich im Inneren des Ventilsitzträgers erstreckende Ventilnadel und einen mit der Ventilnadel an dem dem Ventilschließkörper gegenüberliegenden Ende verbundenen Anker mittels einer Magnetspule elektromagnetisch betätigbar. Der Ventilsitzträger ist in einen Gehäusekörper eingesetzt und mittels eines in den Gehäusekörper eingeschraubten Gewinderings gegen eine Hubeinstellscheibe vorspannbar, die zwischen dem Gehäusekörper und dem Ventilsitzträger eingesetzt ist. Die Hubeinstellscheibe befindet sich somit im Inneren des Gehäusekörpers. Die Hubeinstellscheibe dient dazu, den Hub des Ventilschließkörpers bei der elektromagnetischen Betätigung des Brennstoffeinspritzventils einzustellen. Eine Variation der Dickenabmessung der Hubeinstellscheibe führt damit zu einer Variation der axialen Lage der Ventilsitzfläche. Bei einer bestimmten Länge der Ventilnadel und einer bestimmten Lage einer Anschlagfläche für den Anker ist damit der Ventilhub festgelegt.DE 196 26 576 A1 already discloses a fuel injector known according to the preamble of claim 1. This fuel injector has a valve closing body, the one with a valve seat support Valve seat surface interacts to form a sealing seat. The Valve closing body is located on the inside of the Valve seat carrier extending valve needle and one with the Valve needle on the opposite of the valve closing body Anchor connected at the end by means of a magnetic coil can be operated electromagnetically. The valve seat support is in used a housing body and by means of a Housing body screwed threaded ring against a stroke adjusting disc preloadable between the housing body and the valve seat carrier is inserted. The stroke adjustment disc is therefore located inside the housing body. The stroke adjusting disc serves the stroke of the valve closing body in the electromagnetic actuation of the Adjust fuel injector. A variation of the Thickness dimension of the stroke adjustment disc leads to a Variation of the axial position of the valve seat surface. At a certain length of the valve needle and a certain position One stop surface for the armature is the valve lift established.

Vor der Montage des Brennstoffeinspritzventils werden verschiedene Maße der Einzelteile des Brennstoffeinspritzventils, die einen Einfluß auf den Ventilhub haben, vermessen und eine entsprechende Hubeinstellscheibe so zugepaart, daß sich unabhängig von den Fertigungstoleranzen Ventilhübe in einem sehr engen Toleranzbereich ergeben.Before installing the fuel injector different dimensions of the individual parts of the fuel injector, that have an influence on the valve stroke, measured and a corresponding stroke adjusting disc paired that independently of the manufacturing tolerances Valve strokes in a very narrow tolerance range.

Dieses bekannte Brennstoffeinspritzventil ist insofern nachtteilig, als die Hubeinstellscheibe einen relativ kleinen Durchmesser aufweist und somit nicht für alle Anwendungsfälle ein genügender Schutz gegen eine Verkippung des Ventilsitzträgers gegeben ist. Besonders nachteilig ist, daß die Hubeinstellscheibe sich im Inneren des Gehäusekörpers befindet und somit das Zusammenfügen von Gehäusekörper, Ventilsitzträger und Hubeinstellscheibe ein Einsetzen der Hubeinstellscheibe in das Innere des Gehäusekörpers erfordert, was fertigungstechnisch aufwendig ist. Ferner besteht die Gefahr, daß das für den Gewindering benötigte Gewinde verschmutzt wird.This known fuel injector is so far night part, as the stroke adjustment a relative has a small diameter and therefore not for all applications adequate protection against tilting of the Valve seat support is given. It is particularly disadvantageous that the stroke adjusting disc is inside the housing body and thus the assembly of the housing body, Valve seat carrier and stroke adjustment disc inserting the Stroke adjustment disc in the interior of the housing body requires what is technically complex. Further there is a risk that that required for the threaded ring Thread becomes dirty.

Ein bekanntes Brennstoffeinspritzventil in ähnlicher Bauart ist in Fig. 1 dargestellt und wird später ausführlich beschrieben. Diese Bauart entspricht hinsichtlich der Anordnung der Hubeinstellscheibe derjenigen der DE 196 26 576 A1 mit dem Unterschied, daß der Ventilsitzträger mit dem Ventilgehäuse nicht durch einen Gewindering sondern durch eine Bördelverbindung verbunden ist. Auch diesem Brennstoffeinspritzventil haften die bereits beschriebenen Nachteile an.A known fuel injector of a similar design is shown in Fig. 1 and will be detailed later described. This design corresponds to the arrangement the stroke adjuster of those of DE 196 26 576 A1 with the difference that the valve seat support with the valve housing not through a threaded ring but is connected by a flare connection. Also this fuel injector are liable for those already described Disadvantages.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Brennstoffeinspritzventil mit den Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß die Hubeinstellscheibe aufgrund der peripher außenseitigen Anordnung gegenüber dem Gehäusekörper einfach und kostengünstig montierbar ist. Zugleich ergibt sich der Vorteil, daß der Ventilsitzträger gegenüber dem Gehäusekörper durch die Hubeinstellscheibe aufgrund des relativ großen Durchmessers der Hubeinstellscheibe besser gegen ein Verkippen gesichert ist.The fuel injector according to the invention with the features of claim 1 has the advantage that the Stroke adjustment disc due to the peripheral outside Arrangement compared to the housing body simple and inexpensive is mountable. At the same time, there is the advantage that the valve seat support against the housing body through the stroke adjusting disc due to the relatively large diameter the stroke adjusting disc against tilting is secured.

Ferner ist vorteilhaft, daß die Montage der Hubeinstellscheibe nicht schmutzanfällig ist und durch den Wegfall des beim Stand der Technik vorgesehenen Gewinderings sich eine Reduzierung der Einzelteile ergibt.It is also advantageous that the assembly of the stroke adjusting disc is not susceptible to dirt and due to the elimination of the provided in the prior art threaded ring Reduction of the individual parts results.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des im Anspruch 1 angegebenen Brennstoffeinspritzventils möglich.By the measures listed in the subclaims advantageous developments of that specified in claim 1 Fuel injector possible.

Die Hubeinstellscheibe ist vorzugsweise in eine umlaufende Nut des Gehäusekörpers einsetzbar und liegt an einer zulaufseitigen Stirnfläche an dem Gehäusekörper und an einer abspritzseitigen Stirnfläche an einem peripher umlaufenden Vorsprung des Ventilsitzkörpers an. Die Verbindung zwischen dem Gehäusekörper und der Hubeinstellscheibe einerseits und zwischen der Hubeinstellscheibe mit dem Ventilsitzträger andererseits kann dann jeweils mittels einer Schweißnaht erfolgen. Dabei hat die Hubeinstellscheibe nicht nur die Funktion, die axiale Lage des Ventilsitzträgers gegenüber dem Gehäusekörper und damit den Ventihub festzulegen, sondern zugleich die Funktion eines Verbindungselements zwischen dem Gehäusekörper und dem Ventilsitzträger. Durch die Schweißnähte wird bevorzugt eine Schweißschrumpfspannung hervorgerufen, die den Gehäusekörper, die Hubeinstellscheibe und den Ventilsitzkörper gegeneinander vorspannt. Dadurch ergibt sich eine besonders hohe Festigkeit.The stroke adjusting disc is preferably in a rotating one Groove of the housing body can be used and lies on an inlet side End face on the housing body and on one spray-side end face on a peripheral circumferential Protrusion of the valve seat body. The connection between the housing body and the stroke adjusting disc on the one hand and between the stroke adjusting disc with the valve seat support on the other hand, a weld seam can then be used respectively. The stroke adjuster not only has that Function, the axial position of the valve seat carrier opposite to determine the housing body and thus the valve stroke, but also the function of a connecting element between the housing body and the valve seat carrier. By the weld seams is preferably a weld shrink tension caused the housing body, the stroke adjustment and biases the valve seat body against each other. Thereby the strength is particularly high.

Vorzugsweise ist ein zulaufseitiges Ende des Ventilsitzkörpers in ein abspritzseitiges Ende des Gehäusekörpers einsetzbar, wobei diese Bauteile mittels einer Dichtung gegeneinander abgedichtet sind. Dies hat den Vorteil, daß der Druck des in dem Brennstoffeinspritzventil befindlichen Brennstoffs nicht bis zu der Hureinstellscheibe und den Schweißnähten vordringt und somit keine Belastung der Schweißnähte durch den Brennstoffdruck auftritt. Die Verbindung zwischen dem Ventilgehäuse und dem Ventilsitzträger sowie die Hubeinstellung sind daher weitgehend unabhängig von dem Brennstoffdruck.Preferably there is an inlet end of the valve seat body into an injection-side end of the housing body can be used, these components using a seal are sealed against each other. This has the advantage that the pressure of that in the fuel injector Fuel not up to the whore shim and Penetrates welds and therefore no strain on the Welds occur due to fuel pressure. The connection between the valve housing and the valve seat support and the stroke setting are therefore largely independent from the fuel pressure.

Dabei ist es vorteilhaft, daß die Schweißnähte durch von außen radial angreifende Schweißwerkzeuge in einfacher Weise aufgebracht werden können.It is advantageous that the welds by Radially attacking welding tools on the outside in a simple manner can be applied.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
einen axialen Schnitt durch ein Brennstoff-einspritzventil gemäß dem Stand der Technik und
Fig. 2
einen auszugsweisen axialen Schnitt durch ein erfindungsgemäßes Brennstoffeinspritzventil im Bereich der Hubeinstellscheibe.
An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1
an axial section through a fuel injection valve according to the prior art and
Fig. 2
an excerpt axial section through a fuel injection valve according to the invention in the region of the stroke adjusting disc.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Zum besseren Verständnis der Erfindung ist in Fig. 1 ein Brennstoffeinspritzventil gemäß dem Stand der Technik dargestellt, so daß sich die spätere Beschreibung des erfindungsgemäßen Ausführungsbeispiels auf die erfindungsgemäßen Besonderheiten beschränken kann. Das in Fig. 1 dargestellte Brennstoffeinspritzventil dient zum Einspritzen von Brennstoff, insbesondere bei einer gemischverdichtenden fremdgezündeten Brennkraftmaschine.1 for a better understanding of the invention Fuel injector according to the prior art, so that the later description of the invention Embodiment on the invention Can restrict special features. That in Fig. 1 Fuel injector shown is used for injection of fuel, especially with a mixture compressing spark ignition internal combustion engine.

Das allgemein mit dem Bezugszeichen 1 bezeichnete Brennstoffeinspritzventil hat einen Ventilschließkörper 2, der mit einer an einem Ventilsitzkörper 3 ausgebildeten Ventilsitzfläche 4 zu einem Dichtsitz zusammenwirkt. Der Ventilschließkörper 2 ist über eine Ventilnadel 5 mit einem Anker 6 verbunden. Der Anker 6 ist mittels einer Magnetspule 7 mit einer axialen Kraftkomponente so beaufschlagbar, daß der Ventilschließkörper 2 von der Ventilsitzfläche 4 abhebt und eine Abspritzöffnung 8 freigibt. Nach Abschalten- des die Magnetspule 7 erregenden elektrischen Erregerstromes wird der Ventilschließkörper 2 durch eine an dem Anker 6 angreifende Rückstellfeder 9 wieder in seine Schließlage zurückgeführt. Die Vorspannung der Rückstellfeder 9 ist über eine mittels eines Gewindes mit einem ersten Gehäusekörper 11 verbundenen Einstellhülse 10 einstellbar. Der Brennstoff strömt über eine Brennstoffeinlaßöffnung 12 und ein Brennstofffilter 13 in eine axiale Längsbohrung 14 des ersten Gehäusekörpers 11 und weiter über eine axiale Längsbohrung 15 der Einstellhülse 10 sowie eine Längsbohrung 16 des Ankers 6 und eine Längsbohrung 17 einer noch näher zu beschreibenden Hubeinstellscheibe 18 in eine Längsbohrung 19 des Ventilsitzträgers 3 und gelangt somit zu dem von dem Ventilschließkörper 2 mit der Ventilsitzfläche 4 gebildeten Dichtsitz.The fuel injector, generally designated by the reference number 1 has a valve closing body 2, the with a valve seat surface formed on a valve seat body 3 4 interacts to form a sealing seat. The valve closing body 2 is via a valve needle 5 with an anchor 6 connected. The armature 6 is connected by means of a magnetic coil 7 an axial force component so acted that the Valve closing body 2 lifts off the valve seat surface 4 and a spray opening 8 releases. After switching off the Solenoid 7 exciting electrical excitation current is the valve closing body 2 by one acting on the armature 6 Return spring 9 back into its closed position recycled. The bias of the return spring 9 is over one by means of a thread with a first housing body 11 connected adjusting sleeve 10 adjustable. The fuel flows through a fuel inlet opening 12 and a fuel filter 13 in an axial longitudinal bore 14 of the first Housing body 11 and further via an axial longitudinal bore 15 of the adjusting sleeve 10 and a longitudinal bore 16 of the Armature 6 and a longitudinal bore 17 one even closer descriptive stroke adjusting disk 18 in a longitudinal bore 19 of the valve seat support 3 and thus arrives at that of the Valve closing body 2 formed with the valve seat surface 4 Sealing seat.

Der erste Gehäusekörper 11 ist von einem Kunststoffspritzgußkörper 20 umgeben, an welchem auch ein Verbindungsstecker 21 zur elektrischen Verbindung eines Verbindungskabels mit der Magnetspule 7 angespritzt ist.The first housing body 11 is made of a plastic injection molded body 20 surround, on which also a connector 21 for the electrical connection of a connecting cable the solenoid 7 is molded.

Ferner ist ein zweiter Gehäusekörper 22 vorgesehen, der mit dem ersten Gehäusekörper 11 durch eine erste Bördelverbindung 23 verbunden ist. Der zweite Gehäusekörper 22 weist eine Längsbohrung 24 auf, in welche der Ventilsitzträger 3 axial eingesetzt ist und mittels einer Dichtung 25 gegenüber dem zweiten Gehäusekörper 22 abgedichtet ist. Der Ventilsitzträger 3 und der zweite Gehäusekörper 22 sind durch eine zweite Bördelverbindung 30 miteinander verbunden.Furthermore, a second housing body 22 is provided, which with the first housing body 11 by a first crimp connection 23 is connected. The second housing body 22 has a longitudinal bore 24 into which the valve seat support 3 is inserted axially and opposite by means of a seal 25 the second housing body 22 is sealed. The valve seat support 3 and the second housing body 22 are by a second flange connection 30 connected together.

Zwischen einer stromabwärtigen Stirnfläche 26 des zweiten Gehäusekörpers 22 und einer stromaufwärtigen Stirnfläche 27 des Ventilsitzträgers 3 befindet sich die bereits beschriebene Hubeinstellscheibe 18. Between a downstream end face 26 of the second Housing body 22 and an upstream end face 27 of the valve seat carrier 3 is the one already described Stroke adjuster 18.

Die Hubeinstellschelbe 18 dient der Festlegung des Ventilhubs, d. h. des Hubs des Ventilschließkörpers 2 von der Ventilschließfläche 4 im betätigten Zustand des Brennstoffeinspritzventils 1. Dabei ist der Ventilhub durch einen in der Fig. 1 nicht erkennbaren geringfügigen Spalt zwischen der stromaufwärtigen Stirnfläche 28 des Ankers 6 und einer stromabwärtigen Stirnfläche 29 des ersten Gehäusekörpers 11 festgelegt. Dieser Spalt wiederum ergibt sich durch die Länge der Ventilnadel 5 und des Ankers 6, gemessen von der stromaufwärtigen Stirnfläche 28 des Ankers 6 bis zu der Anlagefläche des Ventilschließkörpers 2 an der Ventilschließfläche 4 des Ventilsitzträgers 3, und durch die axiale Lage des Ventilsitzkörpers 3. Der Ventilhub ist deshalb von den Fertigungstoleranzen zahlreicher Bauteile abhängig, insbesondere von der Fertigungstoleranz des Ventilschließkörpers 4, der Ventilnadel 5, des Ankers 6, des Ventilsitzträgers 3 und der beiden Gehäusekörper 11 und 22. Da die Summe dieser Fertigungstoleranzen erheblich größer ist als die zu fordernde Toleranz des Ventilhubes werden entsprechend einem üblichen Verfahren den Ventilhub bestimmende Maße der vorstehend genannten Bauteile vermessen und eine geeignete Hubeinstellscheibe zugepaart. Dabei wird die Dickenabmessung der Hubeinstellscheibe so ausgewählt bzw. so gefertigt, daß sich insgesamt der geforderte Ventilhub in einem engen Toleranzfenster einstellt.The stroke adjustment plate 18 serves to determine the valve stroke, d. H. of the stroke of the valve closing body 2 from the Valve closing surface 4 in the actuated state of the fuel injector 1. The valve lift is by an in 1 not discernible slight gap between the upstream end face 28 of the armature 6 and one downstream end face 29 of the first housing body 11 established. This gap in turn results from the Length of the valve needle 5 and the armature 6, measured from the upstream end face 28 of the armature 6 to the Contact surface of the valve closing body 2 on the valve closing surface 4 of the valve seat support 3, and by the axial position of the valve seat body 3. The valve lift is therefore on the manufacturing tolerances of numerous components depending, in particular on the manufacturing tolerance of the Valve closing body 4, the valve needle 5, the armature 6, the Valve seat support 3 and the two housing bodies 11 and 22. Because the sum of these manufacturing tolerances is significantly larger is considered to be the required tolerance of the valve lift according to a common procedure, the valve lift measure the determining dimensions of the above components and paired a suitable stroke adjustment disc. Doing so the thickness dimension of the stroke adjustment disc is selected in this way or manufactured so that the total required valve lift within a narrow tolerance window.

Die Erfindung betrifft eine Verbesserung der Anordnung und Ausbildung der Hubeinstellscheibe 18.The invention relates to an improvement in the arrangement and Forming the stroke adjusting disk 18.

Fig. 2 zeigt ein Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils 1 in einer auszugsweisen, geschnittenen Darstellung. Gezeigt sind lediglich diejenigen Elemente, die in bezug auf die Erfindung wesentlich sind. Um die Zuordnung zu erleichtern, sind bereits anhand von Fig. 1 beschriebene Elemente mit übereinstimmenden Bezugszeichen versehen.Fig. 2 shows an embodiment of an inventive Fuel injector 1 in an excerpt, cut illustration. Only those are shown Elements essential to the invention. Around The assignment is already made easier with reference to FIG. 1 described elements with matching reference numerals Mistake.

In Fig. 2 sind der erste Gehäusekörper 11, der zweite Gehäusekörper 22, der Ventilsitzträger 3, die sich in einer axialen Längsbohrung 19 des Ventilsitzträgers 3 erstreckende Ventilnadel 5, der mit der Ventilnadel 3 verbundene Anker 6, die über einen Flansch 40 an der Ventilnadel 5 angreifende Rückstellfeder 9 und die Magnetspule 7 erkennbar. Der Ventilhub ist durch einen Spalt 41 zwischen der zulaufseitigen Stirnfläche 28 des Ankers 6 und einer abspritzseitigen Stirnfläche 42 eines rohrförmigen Abschnitts 43 des zweiten Gehäusekörpers 22 festgelegt. Der rohrförmige Abschnitt 43 ist mit einem radial nach außen ragenden Bereich 44 des zweiten Gehäusekörpers 22 über einen dünnen Verbindungssteg 45 verbunden. Der Verbindungssteg 45 ist äußerst dünn dimensioniert, um den Hauptteil des magnetischen Flusses durch den Anker 6 hindurchzuführen und einen magnetischen Kurzschluß an dem Verbindungssteg 45 zu vermeiden. Der Anker 6 weist Bohrungen 46 für den Durchtritt des Brennstoffs auf.2, the first housing body 11, the second Housing body 22, the valve seat support 3, which is in a axial longitudinal bore 19 of the valve seat support 3 extending Valve needle 5, the armature 6 connected to the valve needle 3, which engages the valve needle 5 via a flange 40 Return spring 9 and the solenoid 7 can be seen. The Valve stroke is through a gap 41 between the inlet side Face 28 of the armature 6 and a spray side End face 42 of a tubular portion 43 of the second housing body 22 set. The tubular Section 43 has a radially protruding outward Area 44 of the second housing body 22 over a thin Connecting web 45 connected. The connecting web 45 is dimensioned extremely thin to the main part of the lead magnetic flux through the armature 6 and a magnetic short circuit at the connecting web 45 avoid. The armature 6 has holes 46 for the passage of fuel on.

Erfindungsgemäß umgibt die Hubeinstellscheibe 18 ein abspritzseitiges Ende 47 des zweiten Gehäusekörpers 22 peripher außenseitig. Die Hubeinstellscheibe 18 ist vorzugsweise ringförmig ausgebildet. Dabei ist die Hubeinstellscheibe 18 ein Bestandteil des Ventilgehäuses und ist in eine umlaufende Nut 48 des zweiten Gehäusekörpers 22 einsetzbar. Die Hubeinstellscheibe 18 liegt mit einer zulaufseitigen Stirnfläche 49 an einer gegenüberliegenden, zugehörigen Stirnfläche 50 des zweiten Gehäusekörpers 22 im montierten Zustand bündig an. Eine abspritzseitige Stirnfläche 51 der Hubeinstellscheibe 18 liegt an einer gegenüberliegenden, zugehörigen Stirnfläche 52 des Ventilsitzkörpers 3 im montierten Zustand bündig an. Dabei ist die der abspritzseitigen Stirnfläche 51 der Hubeinstellscheibe 18 gegenüberliegende Stirnfläche 52 bei dem in Fig. 2 dargestellten Ausführungsbeispiel an einem peripher umlaufenden Vorsprung 53 des Ventilsitzkörpers 3 ausgebildet. Zwischen der Hubeinstellscheibe 18 und dem abspritzseitigen Ende 47 des zweiten Gehäusekörpers 22 befindet sich vorzugsweise ein radialer Toleranzspalt 54. According to the invention, the stroke adjusting disk 18 surrounds spray-side end 47 of the second housing body 22 peripheral outside. The stroke adjuster 18 is preferred ring-shaped. Here is the stroke adjustment disc 18 is part of the valve housing and is in a circumferential groove 48 of the second housing body 22 used. The stroke adjusting disc 18 lies with a inlet end face 49 on an opposite, associated end face 50 of the second housing body 22 in the assembled condition. An end face on the spray side 51 of the stroke adjusting disk 18 lies on an opposite, associated end face 52 of the valve seat body 3 flush when assembled. The is the spray-side end face 51 of the stroke adjusting disk 18 opposite end face 52 in the case of FIG. 2 illustrated embodiment on a peripheral circumferential Projection 53 of the valve seat body 3 is formed. Between the stroke adjusting disc 18 and the spray side The end 47 of the second housing body 22 is located preferably a radial tolerance gap 54.

Ein zulaufseitiges Ende 55 des Ventilsitzkörpers 3 ist in eine Aufnahmebohrung 56 des abspritzseitigen Endes 47 des zweiten Gehäusekörpers 22 einführbar, so daß das von der Hubeinstellscheibe 18 umgebene abspritzseitige Ende 47 des zweiten Gehäusekörpers 22 das zulaufseitige Ende 55 des Ventilsitzträgers 3 umgibt. Dabei ist das zulaufseitige Ende 55 des Ventilsitzträgers 3 zu dem abspritzseitigen Ende 47 des zweiten Gehäusekörpers 22 hin mittels der umlaufenden Dichtung 25 abgedichtet. Die Dichtung 25 ist vorzugsweise als 0-Ring ausgebildet und in eine radiale Nut 57 des zulaufseitigen Endes 55 des Ventilsitzträgers 3 eingesetzt.An inlet-side end 55 of the valve seat body 3 is shown in FIG a receiving bore 56 of the spray-side end 47 of the second housing body 22 insertable, so that the Stroke adjuster 18 surrounded end 47 of the spray second housing body 22, the inlet end 55 of the Valve seat carrier 3 surrounds. Here is the inlet end 55 of the valve seat carrier 3 to the spray-side end 47 of the second housing body 22 by means of the rotating Seal 25 sealed. Seal 25 is preferred formed as an 0-ring and in a radial groove 57 of inlet end 55 of the valve seat carrier 3 used.

Die Hubeinstellscheibe 18 ist mittels einer ersten umlaufenden Schweißnaht 58 an ihrer zulaufseitigen Stirnfläche 49 mit dem zweiten Gehäusekörper 22 und mittels einer zweiten umlaufenden Schweißnaht 59 an ihrer abspritzseitigen Stirnfläche 51 mit dem Ventilsitzträger 3 verschweißt. Die Schweißnähte 58 und 59 sind fertigungstechnisch ohne Schwierigkeiten mit einem von außen radial angreifenden Schweißwerkzeug aufbringbar. Dabei erstrecken sich die Schweißnähte 58 und 59 nicht über die gesamte Stirnfläche 49 und 50 bzw. 51 und 52. Durch diese Beschränkung der Schweißnahttiefe bleibt ein Teil der planen Stirnflächen 49 und 50 einerseits und 51 und 52 andererseits erhalten, so daß eine exakte axiale Ausrichtung des Ventilsitzträgers 3 bezüglich der Mittelachse 60 des Brennstoffeinspritzventils 1 durch die Hubeinstellscheibe 18 vermittelt wird. Die Erfindung macht sich gezielt die durch die Schweißnähte 58 und 59 hervorgerufene Schweißschrumpfspannung zunutze. Die Schweißschrumpfspannung bewirkt eine Vorspannung des zweiten Gehäusekörpers 22, der Hubeinstellscheibe 18 und des Ventilsitzträgers 3 gegeneinander, so daß eine spaltfreie Schweißnaht und eine hohe Festigkeit erzielt werden.The stroke adjusting disk 18 is by means of a first one circumferential weld seam 58 on its inlet end face 49 with the second housing body 22 and by means of a second circumferential weld seam 59 on its spray-side End face 51 welded to the valve seat support 3. The Weld seams 58 and 59 are technically without Difficulties with a radially attacking from the outside Welding tool can be applied. The extend Welds 58 and 59 do not extend over the entire end face 49 and 50 or 51 and 52. By limiting this The weld depth remains part of the flat end faces 49 and 50 on the one hand and 51 and 52 on the other hand received, so that an exact axial alignment of the valve seat support 3 with respect to the central axis 60 of the fuel injector 1 is conveyed by the stroke adjusting disk 18. The The invention makes targeted use of the weld seams 58 and 59 generated welding shrinkage stress. The Welding shrink tension causes the second to be pre-tensioned Housing body 22, the stroke adjustment 18 and the valve seat support 3 against each other, so that a gap-free Weld seam and high strength can be achieved.

Ein wesentlicher Vorteil der erfindungsgemäß peripher außenseitig angeordneten Hubeinstellscheibe 18 gegenüber der in Fig. 1 in dem zweiten Gehäusekörper 22 innenseitig angeordneten Hubeinstellscheibe 18 liegt in dem vergrößerten Durchmesser der Hubeinstellscheibe 18, wodurch sich eine höhere Genauigkeit der Ausrichtung des Ventilsitzträgers 3 gegenüber der Mittelachse 60 des Brennstoffeinspritzventils 1 und somit ein geringerer Toleranzbereich einer möglichen Verkippung des Ventilsitzträgers 3 erreichen läßt. Ein weiterer Vorteil besteht darin, daß beim Zusammenfügen des Brennstoffeinspritzventils 1 die Hübeinstellscheibe 18 ohne Schwierigkeiten in die umlaufende Nut 48 des zweiten Gehäusekörpers 22 eingesetzt werden kann und sich somit eine äußerst montagefreundliche Ausgestaltung des Brennstoffeinspritzventils 1 ergibt. Bei dem in Fig. 1 gezeigten Stand der Technik hingegen muß die Hubeinstellscheibe 18 in die axiale Bohrung 24 des zweiten Gehäusekörpers 22 eingesetzt werden, was insbesondere bei einer automatischen Fertigung schwieriger zu handhaben ist. Auch ist die erfindungsgemäße Anordnung und Montage der Hubeinstellscheibe 18 unempfindlich gegen Verschmutzungen.A major advantage of the outside according to the invention arranged stroke adjusting disc 18 with respect to the in Fig. 1 inside the second housing body 22 arranged stroke adjusting disc 18 lies in the enlarged Diameter of the stroke adjusting disc 18, which results in a higher accuracy of the alignment of the valve seat support 3 with respect to the central axis 60 of the fuel injector 1 and thus a smaller tolerance range of a possible one Tilting of the valve seat carrier 3 can be reached. On Another advantage is that when the Fuel injector 1, the setting dial 18 without Difficulties in the circumferential groove 48 of the second Housing body 22 can be used and thus a Extremely easy-to-assemble design of the fuel injector 1 results. In the state shown in Fig. 1 the technology, however, the stroke adjustment 18 in the axial bore 24 of the second housing body 22 is used be what particularly in automatic manufacturing is more difficult to handle. Also is the invention Arrangement and assembly of the stroke adjusting disk 18 insensitive to dirt.

Die Dichtung 25 stellt sicher, daß der im Inneren des Brennstoffeinspritzventils 1 zu dem Dichtsitz strömende Brennstoff nicht bis zu den Schweißnähten 58 und 59 vordringt. Die Schweißnähte 58 und 59 werden deshalb nicht mit dem Brennstoff druck belastet. Dies ist insbesondere bei Hochdruck-Einspritzventilen wesentlich, bei welchen eine hoher Brennstoffdruck von bis zu 150 bar herrscht und dennoch enge Toleranzen des Ventilhubs von beispielsweise 0,2 % erreicht werden müssen. Die Schweißnähte 58 und 59 müssen keine Dichtheit gewährleisten, sondern lediglich die axialen Kräfte zwischen dem zweiten Gehäusekörper 22 und der Hubeinstellscheibe 18 einerseits und zwischen der Hubeinstellscheibe 18 und dem Ventilsitzträger 3 andererseits aufnehmen. Dadurch können die Vorspannkräfte während des Schweißens gering gehalten werden. Durch das erfindungsgemäße Verschweißen der Hubeinstellscheibe 18 mit dem zweiten Gehäusekörper 22 und dem Ventilsitzträger 3 entfällt der beim Stand der Technik gemäß der DE 196 26 576 A1 vorgesehene Gewindering. Diese Einsparung eines Bauteils verringert die Fertigungskosten. The seal 25 ensures that the inside of the fuel injector 1 fuel flowing to the sealing seat does not penetrate to weld seams 58 and 59. The welds 58 and 59 are therefore not with the Fuel under pressure. This is especially true with high pressure injectors essential, where a high There is a fuel pressure of up to 150 bar and still tight Tolerances of the valve lift of, for example, 0.2% are reached Need to become. The weld seams 58 and 59 do not have to be Ensure tightness, but only the axial Forces between the second housing body 22 and the stroke adjusting disc 18 on the one hand and between the stroke adjusting disc 18 and the valve seat support 3 on the other take up. This allows the biasing forces during Welding can be kept low. By the invention Welding the stroke adjusting disc 18 with the second housing body 22 and the valve seat support 3 is omitted of the prior art according to DE 196 26 576 A1 provided threaded ring. This saving of one component reduces manufacturing costs.

Die Verbindung zwischen dem ersten Gehäusekörper 11 und dem zweiten Gehäusekörper 22 kann durch eine weitere Schweißnaht 61 erfolgen, die ebenfalls außenseitig aufgebracht werden kann.The connection between the first housing body 11 and the second housing body 22 can by a further weld 61 take place, which are also applied on the outside can.

Erfindungsgemäß sind in der Hubeinstellscheibe 18 drei Funktionen miteinander vereint: Die Hubeinstellscheibe 18 legt den Ventilhub fest, sie bildet ein integrales Bestandteil des Ventilgehäuses und sie vermittelt die Verbindung zwischen dem zweiten Gehäusekörper 44 und dem Ventilsitzträger 3.According to the invention, there are three in the stroke adjusting disk 18 Functions combined: the stroke adjustment disc 18 defines the valve stroke, it forms an integral part of the valve housing and it mediates the connection between the second housing body 44 and the valve seat carrier Third

Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt. Insbesondere kann die erfindungsgemäße Anordnung der Hubeinstellscheibe 18 auch bei außen öffnenden Brennstoffeinspritzventilen 1 in gleicher Weise zum Einsatz kommen.The invention is not based on the illustrated embodiment limited. In particular, the invention Arrangement of the stroke adjusting disc 18 also with the outside opening Fuel injection valves 1 are used in the same way come.

Claims (9)

  1. Fuel injection valve (1), in particular injection valve for high-pressure fuel injection systems of internal combustion engines, having
    a valve-closing body (2) which interacts with a valve seat surface (4), which is formed on a valve seat support (3), to form a sealing seat,
    at least one housing body (22) which is part of a valve housing (11, 22), and
    a stroke-setting disc (18) which defines the distance between the housing body (22) and the valve seat support (3),
    characterized in that the stroke-setting disc (18) surrounds an ejection-side end (47) of the housing body (22) peripherally on the outside.
  2. Fuel injection valve according to Claim 1,
    characterized in that the stroke-setting disc (18) is a further part of the valve housing (11, 12, 18).
  3. Fuel injection valve according to Claim 1 or 2,
    characterized in that the housing body (22) has an encircling groove (48) into which the stroke-setting disc (18) can be inserted in such a manner that the stroke-setting disc (18) bears with an inlet-side end surface (49) against an associated end surface (50) of the housing body (22) and with an ejection-side end surface (51) against an associated end surface (52) of the valve seat support (3).
  4. Fuel injection valve according to Claim 3,
    characterized in that the associated end surface (52) of the valve seat support (3) against which the ejection-side end surface (51) of the stroke-setting disc (18) bears is formed on a peripherally encircling projection (53) of the valve seat support (3).
  5. Fuel injection valve according to Claim 3 or 4,
    characterized in that the stroke-setting disc (18) is welded on the inlet-side end surface (49) to the housing body (22) by means of a first weld seam (58) and is welded on the ejection-side end surface (51) to the valve seat support (3) by means of a second weld seam (59).
  6. Fuel injection valve according to Claim 5,
    characterized in that the weld seams (58, 59) do not extend radially over the entire surface area of the end surfaces (49, 51) and are designed to be gap-free.
  7. Fuel injection valve according to Claim 5 or 6,
    characterized in that the housing body (22), the stroke-setting disc (18) and the valve seat support (3) are prestressed against one another owing to a welding contraction stress caused by the weld seams (58, 59).
  8. Fuel injection valve according to one of Claims 1 to 7,
    characterized in that an inlet-side end (55) of the valve seat support (3) is inserted into the ejection-side end (47) of the housing body (22), with the result that the ejection-side end (47) of the housing body (22), which end is surrounded by the stroke-setting disc (18), surrounds the inlet-side end (55) of the valve seat support (3).
  9. Fuel injection valve according to Claim 8,
    characterized in that the inlet-side end (55) of the valve seat support (3) and the ejection-side end (47) of the housing body (22) are sealed against each other by means of a seal (25).
EP99950456A 1998-11-18 1999-07-29 Fuel injection valve Expired - Lifetime EP1047870B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19853091 1998-11-18
DE19853091A DE19853091A1 (en) 1998-11-18 1998-11-18 Fuel injector
PCT/DE1999/002332 WO2000029739A1 (en) 1998-11-18 1999-07-29 Fuel injection valve

Publications (2)

Publication Number Publication Date
EP1047870A1 EP1047870A1 (en) 2000-11-02
EP1047870B1 true EP1047870B1 (en) 2003-06-18

Family

ID=7888149

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Application Number Title Priority Date Filing Date
EP99950456A Expired - Lifetime EP1047870B1 (en) 1998-11-18 1999-07-29 Fuel injection valve

Country Status (7)

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US (1) US6435429B1 (en)
EP (1) EP1047870B1 (en)
JP (1) JP2002530567A (en)
KR (1) KR20010034147A (en)
CZ (1) CZ293800B6 (en)
DE (2) DE19853091A1 (en)
WO (1) WO2000029739A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108974A1 (en) * 2001-02-24 2002-09-05 Bosch Gmbh Robert Fuel injector
DE10143500A1 (en) * 2001-09-05 2003-03-20 Bosch Gmbh Robert Fuel injection valve for fuel injection system for IC engine, has guide collar with flat deviating from circular outer contour of armature so that at least one aperture is formed between collar and guiding counter surface
ITBO20050295A1 (en) * 2005-04-29 2006-10-30 Magneti Marelli Powertrain Spa FUEL INJETOR WITH ELECTROMAGNETIC ACTUATOR
ES2279500T3 (en) * 2005-06-17 2007-08-16 Magneti Marelli Powertrain S.P.A. FUEL INJECTOR.
DE102005052255B4 (en) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Fuel injector
US7942349B1 (en) 2009-03-24 2011-05-17 Meyer Andrew E Fuel injector
JP5537493B2 (en) * 2011-05-13 2014-07-02 日立オートモティブシステムズ株式会社 Fuel injection valve stroke adjusting method and fuel injection valve

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189975A (en) 1984-10-09 1986-05-08 Diesel Kiki Co Ltd Fuel injection nozzle device for internal-combustion engine
DE4115457A1 (en) * 1990-05-17 1991-11-21 Avl Verbrennungskraft Messtech Injection nozzle for IC engine - incorporates hollow needle controlling first group of injection holes and loaded towards closure position by spring
DE4023828A1 (en) 1990-07-27 1992-01-30 Bosch Gmbh Robert Adjusting EM valve for fuel injection - adjusting current without requiring access to return spring by changing magnetic characteristics of inner pole
DE4412277A1 (en) * 1994-04-09 1995-10-12 Bosch Gmbh Robert Electromagnetically actuated fuel injector
DE19626576A1 (en) * 1996-07-02 1998-01-08 Bosch Gmbh Robert Fuel injection valve for internal combustion engine
DE19629589B4 (en) * 1996-07-23 2007-08-30 Robert Bosch Gmbh Fuel injector
DE19712589C1 (en) * 1997-03-26 1998-06-04 Bosch Gmbh Robert Valve needle for solenoid-operated fuel-injector of IC engine

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JP2002530567A (en) 2002-09-17
DE19853091A1 (en) 2000-05-25
DE59905997D1 (en) 2003-07-24
EP1047870A1 (en) 2000-11-02
CZ293800B6 (en) 2004-08-18
WO2000029739A1 (en) 2000-05-25
KR20010034147A (en) 2001-04-25
US6435429B1 (en) 2002-08-20
CZ20002626A3 (en) 2001-05-16

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