WO2001055587A1 - Sealing disc - Google Patents

Sealing disc Download PDF

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Publication number
WO2001055587A1
WO2001055587A1 PCT/DE2000/004145 DE0004145W WO0155587A1 WO 2001055587 A1 WO2001055587 A1 WO 2001055587A1 DE 0004145 W DE0004145 W DE 0004145W WO 0155587 A1 WO0155587 A1 WO 0155587A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
filter
section
sealing disc
component
Prior art date
Application number
PCT/DE2000/004145
Other languages
German (de)
French (fr)
Inventor
Werner Wagner
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2001055587A1 publication Critical patent/WO2001055587A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a sealing washer, in particular for a fuel injection nozzle.
  • the fuel that is supplied to an injection nozzle of a fuel injection system is usually filtered when it enters the injection nozzle. This prevents dirt particles from entering the injection nozzle and impairing its function.
  • a separate filter element is usually used for filtering, as will be described below with reference to FIG. 1.
  • FIG. 1 shows a fuel injection nozzle according to the prior art.
  • the nozzle body 10 is provided with a screwed-in pressure pipe socket 12, via which the fuel is supplied to the injection nozzle, which fuel is finally injected into the combustion chamber of an internal combustion engine supplied by the injection nozzle.
  • a sealing washer 14 is provided, which consists of soft iron. This seals between the bottom of the bore provided for receiving the pressure pipe socket in the nozzle body 10 and the corresponding end face of the pressure pipe socket.
  • a filter element 16 which can be designed as a rod filter, is arranged in the interior of the pressure pipe socket. The filter element serves to filter the fuel supplied via the pressure pipe nozzle 12.
  • the object of the invention is to simplify the known structure.
  • a sealing washer with the features of claim 1 combines the functions of two components that have always been carried out separately in a single component: on the one hand, a sealing effect is provided for the pressure pipe socket, and on the other, a filter is formed for the fuel supplied to the injection nozzle. On the one hand, this results in advantages during assembly. On the other hand, it is avoided that chips and notches arise in the pressure pipe socket, which could previously have been the case when the filter element known from the prior art was pressed in. In addition, the design options for the fuel connection are expanded, since the pressure pipe socket is significantly smaller without the separate filter element. In addition to optimized bore transitions, this also increases the pressure threshold strength.
  • FIG. 3 is a plan view of a sealing washer according to the invention.
  • a sealing washer according to the invention is shown. This is provided with the reference number 140 and has a circular filter section 142 which is surrounded by an annular sealing section 144 lying radially outside the filter section.
  • the filter section 142 has a multiplicity of small filter bores 146, which are laser-drilled, for example. In this way, the diameter of the filter bores 146 can be adapted to the size of the dirt particles to be filtered out.
  • the sealing section 144 is designed with a material strength that is adapted to the sealing function.
  • the sealing section 144 can consist of soft iron.
  • the sealing washer 140 may be also made of a composite material, so that the sealing section 144 can be performed with a comparatively geri ⁇ - gen hardness and the 'filter portion 142 having a greater hardness.
  • the described sealing disk can also be used in connection with a high-pressure fuel pump upstream of its high-pressure nozzle and upstream of the associated pressure control valve.

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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)

Abstract

The invention relates to a sealing disc (140), especially for a fuel injection nozzle, which comprises a filter section (142) and a sealing section (144) that is situated radially outside the filter section (142). According to prior art, the filter component and the sealing disc component are separate components. The invention provides a component which combines the functions of said filter component and said sealing disc component.

Description

Dichtscheibe sealing washer
Stand der TechnikState of the art
Die Erfindung betrifft eine Dichtscheibe, insbesondere für eine Kraftstoff-Einspritzdüse.The invention relates to a sealing washer, in particular for a fuel injection nozzle.
Der Kraftstoff, der einer Einspritzdüse eines Kraftstoff-Einspritzsystems zugeführt wird, wird üblicherweise beim Eintritt in die Einspritzdüse gefiltert. Auf diese Weise wird verhindert, daß Schmutzpartikel in die Einspritzdüse eindringen und deren Funktion beeinträchtigen. Zur Filterung wird üblicherweise ein separates Filterelement verwendet, wie nachfolgend anhand von Fig. 1 be- schrieben wird.The fuel that is supplied to an injection nozzle of a fuel injection system is usually filtered when it enters the injection nozzle. This prevents dirt particles from entering the injection nozzle and impairing its function. A separate filter element is usually used for filtering, as will be described below with reference to FIG. 1.
In Fig. 1 ist eine Kraftstoff-Einspritzdüse nach dem Stand der Technik gezeigt. Der Düsenkörper 10 ist mit einem eingeschraubten Druckrohrstutzen 12 versehen, über den der Einspritzdüse der Kraftstoff zugeführt wird, der schließlich in den Verbrennungsraum einer von der Einspritzdüse versorgten Verbrennungskraftmaschine eingespritzt wird. Um die Dichtigkeit zwischen dem Düsenkörper 10 und dem Druckrohrstutzen 12 zu gewährleisten, ist eine Dichtscheibe 14 vorgesehen, die aus Weicheisen besteht. Diese dichtet zwischen dem Boden der zur Aufnahme des Druckrohrstutzens vorgesehenen Bohrung im Düsenkörper 10 und der entsprechenden Stirnseite des Druckrohrstutzens ab. Im Inneren des Druckrohrstutzens ist ein Filterelement 16 angeordnet, das als Stabfilter ausgebildet sein kann. Das Filterelement dient dazu, den über den Druckrohrstutzeπ 12 zugeführten Kraftstoff zu filtern.1 shows a fuel injection nozzle according to the prior art. The nozzle body 10 is provided with a screwed-in pressure pipe socket 12, via which the fuel is supplied to the injection nozzle, which fuel is finally injected into the combustion chamber of an internal combustion engine supplied by the injection nozzle. In order to ensure the tightness between the nozzle body 10 and the pressure pipe socket 12, a sealing washer 14 is provided, which consists of soft iron. This seals between the bottom of the bore provided for receiving the pressure pipe socket in the nozzle body 10 and the corresponding end face of the pressure pipe socket. A filter element 16, which can be designed as a rod filter, is arranged in the interior of the pressure pipe socket. The filter element serves to filter the fuel supplied via the pressure pipe nozzle 12.
Die Aufgabe der Erfindung besteht darin, den bekannten Aufbau zu vereinfachen.The object of the invention is to simplify the known structure.
Vorteile der ErfindungAdvantages of the invention
Eine Dichtscheibe mit den Merkmalen des Patentanspruchs 1 vereint in einem einzigen Bauteil die Funktionen von zwei bisher immer separat ausgeführten Bauteilen: zum einen wird eine Dichtwirkung für den Druckrohrstutzen bereitgestellt, und zum anderen wird ein Filter für den der Einspritzdüse zugeführten Kraftstoff gebildet. Somit ergeben sich zum einen Vorteile bei der Montage. Zum anderen wird vermieden, daß Späne und Kerben im Druckrohrstutzen entstehen, was bisher beim Einpressen des aus dem Stand der Technik bekannten Filterelementes der Fall sein konnte. Außerdem werden die Gestaltungsmöglichkeiten des Kraftstoffanschlusses erweitert, da der Druckrohrstutzeπ ohne das separate Filterelement deutlich kleiner baut. Dadurch ergibt sich neben optimierten Bohrungsübergängen auch eine Erhöhung der Druckschwellfestigkeit.A sealing washer with the features of claim 1 combines the functions of two components that have always been carried out separately in a single component: on the one hand, a sealing effect is provided for the pressure pipe socket, and on the other, a filter is formed for the fuel supplied to the injection nozzle. On the one hand, this results in advantages during assembly. On the other hand, it is avoided that chips and notches arise in the pressure pipe socket, which could previously have been the case when the filter element known from the prior art was pressed in. In addition, the design options for the fuel connection are expanded, since the pressure pipe socket is significantly smaller without the separate filter element. In addition to optimized bore transitions, this also increases the pressure threshold strength.
Zeichnungendrawings
Die Erfindung wird nachfolgend unter Bezugnahme auf eine bevorzugte Ausführungsform beschrieben, die in den beigefügten Zeichnungen dargestellt ist. In diesen zeigen:The invention is described below with reference to a preferred embodiment which is illustrated in the accompanying drawings. In these show:
- Fig. 1 in einem Querschnitt eine Einspritzdüse mit einer Dichtscheibe nach dem Stand der Technik; - Fig. 2 in vergrößertem Maßstab den Ausschnitt II von Fig. 1 mit einer erfindungsgemäßen Dichtscheibe; und- Figure 1 in cross section an injection nozzle with a sealing washer according to the prior art. - Figure 2 on an enlarged scale the detail II of Figure 1 with a sealing washer according to the invention. and
- Fig. 3 eine Draufsicht auf eine erfindungsgemäße Dichtscheibe.- Fig. 3 is a plan view of a sealing washer according to the invention.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In den Fig. 2 und 3 ist eine erfindungsgemäße Dichtscheibe gezeigt. Diese ist mit dem Bezugszeichen 140 versehen und weist einen kreisförmigen Filterabschnitt 142 auf, der von einem radial außerhalb des Filterabschnittes liegenden, ringförmigen Dichtabschnitt 144 umgeben ist.2 and 3, a sealing washer according to the invention is shown. This is provided with the reference number 140 and has a circular filter section 142 which is surrounded by an annular sealing section 144 lying radially outside the filter section.
Der Filterabschnitt 142 weist eine Vielzahl von kleinen Filterbohrungen 146 auf, die beispielsweise lasergebohrt sind. Der Durchmesser der Filterbohrungen 146 kann auf die Weise an die Größe der herauszufilternden Schmutzpartikel angepaßt werden.The filter section 142 has a multiplicity of small filter bores 146, which are laser-drilled, for example. In this way, the diameter of the filter bores 146 can be adapted to the size of the dirt particles to be filtered out.
Der Dichtabschnitt 144 ist mit einer Materialfestigkeit ausgeführt, die an die Dichtfunktion angepaßt ist. Beispielsweise kann der Dichtabschnitt 144 aus Weicheisen bestehen.The sealing section 144 is designed with a material strength that is adapted to the sealing function. For example, the sealing section 144 can consist of soft iron.
Bei Bedarf kann die Dichtscheibe 140 auch aus einem Verbundwerkstoff gefertigt werden, so daß der Dichtabschnitt 144 mit einer vergleichsweise geriπ- gen Härte und der 'Filterabschnitt 142 mit einer größeren Härte ausgeführt werden können.If necessary, the sealing washer 140 may be also made of a composite material, so that the sealing section 144 can be performed with a comparatively geriπ- gen hardness and the 'filter portion 142 having a greater hardness.
Die beschriebene Dichtscheibe kann auch in Verbindung mit einer Kraftstoff- Hochdruckpumpe vor deren Hochdruckstutzen und vor dem zugehörigen Druckregelventil verwendet werden. The described sealing disk can also be used in connection with a high-pressure fuel pump upstream of its high-pressure nozzle and upstream of the associated pressure control valve.

Claims

Patentansprüche claims
1. Dichtscheibe (140), insbesondere für eine Kraftstoff-Einspritzdüse, mit einem Filterabschnitt (142) und einem Dichtabschnitt (144), wobei der Dichtabschπitt (144) radial außerhalb des Filterabschnittes (142) liegt.1. Sealing disc (140), in particular for a fuel injection nozzle, with a filter section (142) and a sealing section (144), the sealing section (144) lying radially outside the filter section (142).
2. Dichtscheibe nach Anspruch 1 , dadurch gekennzeichnet, daß sie aus Metall besteht.2. Sealing disc according to claim 1, characterized in that it consists of metal.
3. Dichtscheibe nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß der Filterabschnitt (142) mit Filterbohrungen (146) versehen ist.3. Sealing disc according to one of claims 1 and 2, characterized in that the filter section (142) is provided with filter bores (146).
4. Dichtscheibe nach Anspruch 3, dadurch gekennzeichnet, daß es sich bei den Filterbohrungen um lasergebohrte Filterbohrungeπ (146) handelt.4. Sealing disc according to claim 3, characterized in that the filter bores are laser-drilled filter bores (146).
5. Dichtscheibe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Filterabschnitt (142) eine größere Härte aufweist als der Dichtabschnitt (144).5. Sealing disc according to one of the preceding claims, characterized in that the filter section (142) has a greater hardness than the sealing section (144).
6. Dichtscheibe nach einem der vorhergehenden Ansprüche, dadurch ge- kennzeichnet, daß sie aus einem Verbundwerkstoff besteht. 6. Sealing washer according to one of the preceding claims, characterized in that it consists of a composite material.
PCT/DE2000/004145 2000-01-28 2000-11-23 Sealing disc WO2001055587A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003865.4 2000-01-28
DE2000103865 DE10003865A1 (en) 2000-01-28 2000-01-28 Sealing washer

Publications (1)

Publication Number Publication Date
WO2001055587A1 true WO2001055587A1 (en) 2001-08-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004040123A1 (en) * 2002-10-31 2004-05-13 Robert Bosch Gmbh Filter device for a valve for control of fluids
US10060401B2 (en) 2016-04-22 2018-08-28 Caterpillar Inc. Fuel inlet filter for fuel injectors
US20220136473A1 (en) * 2020-10-30 2022-05-05 Caterpillar Inc. Filtration device for a common rail fuel injector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217714A1 (en) * 2002-04-20 2003-11-06 Bosch Gmbh Robert Sealing device for injector body and injector nozzle of fuel injection valve in IC engines has pressure line with sealing sleeve of soft iron material to seal joint simply

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150607C1 (en) * 1981-12-21 1983-07-28 Daimler-Benz Ag, 7000 Stuttgart Fuel injection valve for internal combustion engines
DE3210209A1 (en) * 1982-03-19 1983-09-29 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection nozzle for internal combustion engines
US5356079A (en) * 1993-11-23 1994-10-18 Siemens Automotive L.P. Fuel injector snap-lock filter-retainer
US5423489A (en) * 1992-03-05 1995-06-13 Siemens Automotive L.P. Fuel injector having an internal filter
US5730368A (en) * 1994-09-30 1998-03-24 Robert Bosch Gmbh Nozzle plate, particularly for injection valves and processes for manufacturing a nozzle plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150607C1 (en) * 1981-12-21 1983-07-28 Daimler-Benz Ag, 7000 Stuttgart Fuel injection valve for internal combustion engines
DE3210209A1 (en) * 1982-03-19 1983-09-29 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection nozzle for internal combustion engines
US5423489A (en) * 1992-03-05 1995-06-13 Siemens Automotive L.P. Fuel injector having an internal filter
US5356079A (en) * 1993-11-23 1994-10-18 Siemens Automotive L.P. Fuel injector snap-lock filter-retainer
US5730368A (en) * 1994-09-30 1998-03-24 Robert Bosch Gmbh Nozzle plate, particularly for injection valves and processes for manufacturing a nozzle plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004040123A1 (en) * 2002-10-31 2004-05-13 Robert Bosch Gmbh Filter device for a valve for control of fluids
US10060401B2 (en) 2016-04-22 2018-08-28 Caterpillar Inc. Fuel inlet filter for fuel injectors
US20220136473A1 (en) * 2020-10-30 2022-05-05 Caterpillar Inc. Filtration device for a common rail fuel injector

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Publication number Publication date
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