EP0225487A1 - Fuel injection nozzle for self-igniting internal-combustion engines in particular - Google Patents

Fuel injection nozzle for self-igniting internal-combustion engines in particular Download PDF

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Publication number
EP0225487A1
EP0225487A1 EP86115429A EP86115429A EP0225487A1 EP 0225487 A1 EP0225487 A1 EP 0225487A1 EP 86115429 A EP86115429 A EP 86115429A EP 86115429 A EP86115429 A EP 86115429A EP 0225487 A1 EP0225487 A1 EP 0225487A1
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EP
European Patent Office
Prior art keywords
protective cap
nozzle
injection nozzle
housing
nozzle housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86115429A
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German (de)
French (fr)
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EP0225487B1 (en
Inventor
Karl Hofmann
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0225487A1 publication Critical patent/EP0225487A1/en
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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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

Definitions

  • the invention relates to a fuel injection nozzle according to the preamble of the main claim.
  • the housing parts of the injection nozzle protruding from the mounting hole in the machine housing usually a nozzle holder receiving the closing spring and a union nut which clamps a nozzle body receiving the valve needle against the nozzle holder, are generally provided with a bonding layer as standard, which in some applications causes surface corrosion of the latter Parts not prevented.
  • An improved surface protection for example by galvanizing or painting the parts, raises u. U. significant problems and expensive parts.
  • the arrangement according to the invention with the characterizing features of the main claim solves the corrosion problem with simple and inexpensive means and also has the advantage that the protective cap can serve as an information carrier for the injection nozzle.
  • the protective cap can be color-coded and include the lettering for the nozzle half combination. The lettering can be injected, printed or applied to the protective cap by hot stamping.
  • the multi-part housing of which consists of a nozzle holder, a nozzle body and a union nut which excites the nozzle body against the nozzle holder
  • the protective cap only surrounds the part of the nozzle holder which is not covered by the union nut.
  • a protective cap designed in this way does not hinder the installation and removal of the injection nozzle, so that it does not have to be removed during assembly.
  • the protective cap is an integrated part of the nozzle holder combination, which, once blown open, always remains on the nozzle holder and can also be used for its unmistakable identification during storage.
  • FIG. 1 shows a partial section through a built-in injection nozzle according to the first embodiment
  • FIG. 2 shows a partial view of an injection nozzle according to the second embodiment.
  • the union nut 12 is also provided with a hexagon 30 and also with an external thread 32 with which the complete nozzle holder combination is screwed into the housing 34, 36 of an internal combustion engine.
  • a protective cap 40 is attached to the nozzle holder 10, which is designed as an inherently rigid plastic part and surrounds the parts of the nozzle holder combination that protrude from the housing part 34, namely the nozzle holder 10 and part of the union nut 12.
  • the protective cap 40 is provided at the top with two wall sections 43 forming a neck part 42, which engage behind the lower annular shoulder of the threaded connector 20 and are separated from one another by two radial slots 44 which are offset by 180 °, both of which are penetrated by a leakage oil tube 28 each.
  • a cylindrical section of the protective cap 40 adjoins the wall sections 43 and is guided on the cylindrical section 25 of the nozzle holder 10.
  • the cylindrical section 46 merges at an annular shoulder 50 into a section 52 surrounding the hexagon 24 of the nozzle holder 10 and then into a section 54 surrounding the hexagon 30 of the union nut 12, which section is extended into an enlarged bore section 56 of the housing part 34.
  • the annular shoulder 50 of the protective cap 40 sits on the transition groove between the cylindrical section 48 and the hexagon 24 of the nozzle holder 10 and limits the insertion depth of the protective cap 40.
  • the protective cap 40 covers the parts of the nozzle holder combination that protrude outward from the housing 34, 36 of the internal combustion engine practically up to the threaded connector 20, so that additional operations for the surface treatment of these parts are unnecessary.
  • the protective cap 40 is fitted onto the nozzle holder 10 after the assembly of the nozzle holder combination, the two wall sections 43 of the neck part 42 separated by the radial slots 44 resiliently latching behind the threaded connector 20 when the annular shoulder 50 comes to rest axially on the nozzle holder 10.
  • the protective cap 40 To remove the injection nozzle from the housing 34, 36, the protective cap 40 must be removed, which is not a problem due to the spring elasticity of the neck part 42.
  • a protective cap 60 is provided, which only overlaps regions of a nozzle holder 62 that are not covered by the union nut 12.
  • the protective cap 60 has a cylindrical section 66 which engages over the hexagon 24 of the nozzle holder 62.
  • the cylindrical section 66 fits into an annular shoulder 68 upwardly conically tapered section 70, which includes the section 64 of the nozzle holder 62 in the correct shape.
  • the section 70 is divided into two resilient wall sections 74 by two upwardly open cutouts 72, which engage behind the lower annular shoulder of the threaded connector 20.
  • the recesses 72 are so wide that they allow free access to the drain oil tubes 28.
  • the annular shoulder 68 together with an axial shoulder of the nozzle holder 62, delimits the axial insertion depth of the protective cap 60 at the transition between the section 64 and the hexagon 24.
  • the protective cap 60 is also provided with markings 76, 78 for identifying the injection nozzle, which are applied to the protective cap in a suitable manner.
  • This measure which can also be provided in the embodiment according to FIG. 1, eliminates color markings or inscriptions on the nozzle body 62 or 10 produced by rolling in.

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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

1. Fuel injection nozzle for, in particular, self-ignition-type internal-combustion engines, comprising a nozzle housing (10, 62) which, in the installed condition, protrudes from an installation hole (56) of the engine casing (34) at least over a part of its length and the protruding area of which is provided with a central threaded stub (20) for connecting a fuel line, characterized by the following features : a) a protective cap (40, 60), which is known per se, is constructed as an inherently rigid component which is at least approximately adapted to the shape of the area of the nozzle housing (10, 62) protruding from the engine casing (34) and consists of a material having spring-elastic properties, preferably plastic ; b) the protective cap (40, 60) exhibits at its side facing away from the engine casing an opening through which the threaded stub (20) of the nozzle housing (10, 62) penetrates when the protective cap (40, 60) is pushed onto the nozzle housing (10, 62) ; c) the protective cap (40, 60) also exhibits at its side facing away from the engine casing elastically deflectable wall sections (43, 74) which point towards the opening and which are separated from one another by slots and which lockingly engage behind a shoulder, pointing towards the engine casing, of the threaded stub (20).

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Kraftstoff-Einspritzdüse nach der Gattung des Hauptanspruchs. Die aus der Einbau­bohrung im Maschinengehäuse herausragenden Gehäuseteile der Einspritzdüse, in der Regel ein die Schließfeder auf­nehmender Düsenhalter und eine Überwurfmutter, die einen die Ventilnadel aufnehmenden Düsenkörper gegen den Düsen­halter spannt, sind im allgemeinen serienmäßig mit einer Bonderschicht versehen, die in manchen Anwendungsfällen eine Oberflächenkorrosion dieser Teile nicht verhindert. Ein verbesserter Oberflächenschutz, beispielsweise durch Verzinken oder Lackieren der Teile, wirft in der Fertigung u. U. erhebliche Probleme auf und verteuert die Teile. Bei Einspritzdüsen mit einem Leckölanschluß ist es be­kannt, eine den Leckölanschluß umschließende Schutzkappe aus einem elastomeren Stoff vorzusehen, deren Kappenrand über einen mit dem Maschinengehäuse fest verbundenen, die Einbauöffnung umgebenden Ringkragen gespannt ist (DE 25 27 347 A1). Diese Ausführung erfordert eine umständliche Handhabung beim Ein- und Ausbauen der Einspritzdüse oder wenn allein der Leckölanschluß hergestellt bzw. gelöst werden soll.The invention relates to a fuel injection nozzle according to the preamble of the main claim. The housing parts of the injection nozzle protruding from the mounting hole in the machine housing, usually a nozzle holder receiving the closing spring and a union nut which clamps a nozzle body receiving the valve needle against the nozzle holder, are generally provided with a bonding layer as standard, which in some applications causes surface corrosion of the latter Parts not prevented. An improved surface protection, for example by galvanizing or painting the parts, raises u. U. significant problems and expensive parts. In the case of injection nozzles with a leakage oil connection, it is known to provide a protective cap which surrounds the leakage oil connection and is made of an elastomeric material, the edge of which is stretched over an annular collar which is firmly connected to the machine housing and surrounds the installation opening (DE 25 27 347 A1). This design requires cumbersome handling when installing and removing the injection nozzle or if only the leak oil connection is to be made or released.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Anordnung mit den kennzeichnenden Merk­malen des Hauptanspruchs löst demgegenüber das Korrosions­problem mit einfachen und billigen Mitteln und hat darüber­hinaus den Vorteil, daß die Schutzkappe als Informations­träger für die Einspritzdüse dienen kann. Zu diesem Zweck kann die Schutzkappe eine Farbkennzeichnung haben und die Beschriftung für die Düsenhalberkombination aufnehmen. Die Beschriftung kann eingespritzt, aufgedruckt oder durch Warm­prägen an der Schutzkappe angebracht sein.The arrangement according to the invention with the characterizing features of the main claim solves the corrosion problem with simple and inexpensive means and also has the advantage that the protective cap can serve as an information carrier for the injection nozzle. For this purpose, the protective cap can be color-coded and include the lettering for the nozzle half combination. The lettering can be injected, printed or applied to the protective cap by hot stamping.

Weitere vorteilhafte Ausgestaltungen der Anordnung nach dem Hauptanspruch gehen aus den Unteransprüchen hervor. Bei Einspritzdüsen, deren mehrteiliges Gehäuse aus einem Düsen­halter, einem Düsenkörper und eine den Düsenkörper gegen den Düsenhalter spannende Überwurfmutter besteht, ist es be­sonders vorteilhaft, wenn die Schutzkappe nur den von der Überwurfmutter nicht bedeckten Teil des Düsenhalters um­schließt. Eine derart ausgebildete Schutzkappe behindert nicht das Ein- und Ausbauen der Einspritzdüse, so daß sie bei der Montage nicht entfernt werden muß. Die Schutzkappe ist in diesem Fall eine integriertes Teil der Düsenhalter­kombination, das, einmal aufgesprengt, stets auf dem Düsen­halter verbleibt und auch zu dessen unverwechselbaren Kenn­zeichnung bei der Lagerhaltung dienen kann.Further advantageous embodiments of the arrangement according to the main claim emerge from the subclaims. In the case of injection nozzles, the multi-part housing of which consists of a nozzle holder, a nozzle body and a union nut which excites the nozzle body against the nozzle holder, it is particularly advantageous if the protective cap only surrounds the part of the nozzle holder which is not covered by the union nut. A protective cap designed in this way does not hinder the installation and removal of the injection nozzle, so that it does not have to be removed during assembly. In this case, the protective cap is an integrated part of the nozzle holder combination, which, once blown open, always remains on the nozzle holder and can also be used for its unmistakable identification during storage.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher er­läutert. Es zeigen Figur 1 einen Teilschnitt durch eine ein­gebaute Einspritzdüse nach dem ersten Ausführungsbeispiel und Figur 2 eine Teilansicht einer Einspritzdüse nach dem zweiten Ausführungsbeispiel.Two embodiments of the invention are shown in the drawing and explained in more detail in the following description. 1 shows a partial section through a built-in injection nozzle according to the first embodiment and FIG. 2 shows a partial view of an injection nozzle according to the second embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die Einspritzdüse nach Figur 1 hat einen Düsenhalter 10, an welchem mittels einer Überwurfmutter 12 eine Zwischenscheibe 14 und ein in der Zeichnung nicht sichtbarer Düsenkörper festgespannt sind. Im Düsenkörper ist wie üblich eine Ven­tilnadel verschiebbar gelagert, auf die eine im Düsenhalter 10 untergebrachte Schließfeder 16 über ein Druckstück 18 einwirkt. Der Düsenhalter 10 hat einen Gewindestutzen 20 zum Anschluß einer Kraftstoffleitung, von welchem ein Kanal 22 in einen Druckraum im Düsenkörper führt. Der Düsenhalter 10 ist ferner mit einem Sechskant 24 versehen, oberhalb wel­chem der Düsenhalter 10 einen Abschnitt 25 mit zylindrischer Mantelfläche aufweist. Dieser ist mit zwei sich diametral gegenüberliegenden taschenartigen Vertiefungen 26 versehen, in welchen je ein Leckölröhrchen 28 zum Anschluß einer Leck­ölleitung angeordnet ist. Die Überwurfmutter 12 ist ebenfalls mit einem Sechskant 30 und ferner mit einem Außengewinde 32 versehen, mit welchem die vollständige Düsenhalterkombination in das Gehäuse 34, 36 einer Brennkraftmaschine eingeschraubt ist.The injection nozzle according to FIG. 1 has a nozzle holder 10, to which an intermediate disk 14 and a nozzle body (not visible in the drawing) are clamped by means of a union nut 12. As usual, a valve needle is slidably mounted in the nozzle body, on which a closing spring 16 accommodated in the nozzle holder 10 acts via a pressure piece 18. The nozzle holder 10 has a threaded connector 20 for connecting a fuel line, from which a channel 22 leads into a pressure chamber in the nozzle body. The nozzle holder 10 is further provided with a hexagon 24, above which the nozzle holder 10 has a section 25 with a cylindrical outer surface. This is provided with two diametrically opposed pocket-like depressions 26, in each of which a leak oil tube 28 is arranged for connecting a leak oil line. The union nut 12 is also provided with a hexagon 30 and also with an external thread 32 with which the complete nozzle holder combination is screwed into the housing 34, 36 of an internal combustion engine.

Auf den Düsenhalter 10 ist eine Schutzkappe 40 aufgesteckt, welche als eigensteifes Kunststoffteil ausgebildet ist und die aus dem Gehäuseteil 34 herausragenden Teile der Düsen­halterkombination, nämlich den Düsenhalter 10 und einen Teil der Überwurfmutter 12, schützend umgibt. Die Schutz­kappe 40 ist oben mit zwei einen Halsteil 42 bildenden Wandabschnitten 43 versehen, welche hinter die untere Ring­schulter des Gewindestutzens 20 greifen und durch zwei um 180° zueinander versetzte Radialschlitze 44 voneinander getrennt sind, die beide von je einem Leckölröhrchen 28 durchsetzt sind.A protective cap 40 is attached to the nozzle holder 10, which is designed as an inherently rigid plastic part and surrounds the parts of the nozzle holder combination that protrude from the housing part 34, namely the nozzle holder 10 and part of the union nut 12. The protective cap 40 is provided at the top with two wall sections 43 forming a neck part 42, which engage behind the lower annular shoulder of the threaded connector 20 and are separated from one another by two radial slots 44 which are offset by 180 °, both of which are penetrated by a leakage oil tube 28 each.

An die Wandabschnitte 43 schließt sich ein zylindrischer ab­schnitt der Schutzkappe 40 an, welcher auf dem zylindri­schen Abschnitt 25 des Düsenhalters 10 geführt ist. Der zylindrische Abschnitt 46 geht an einer Ringschulter 50 in einen den Sechskant 24 des Düsenhalters 10 umgebenden Ab­schnitt 52 und danach in einen den Sechskant 30 der Über­wurfmutter 12 umgebenden Abschnitt 54 über, der in einen er­weiterten Bohrungsabschnitt 56 des Gehäuseteils 34 hinein verlängert ist. Die Ringschulter 50 der Schutzkappe 40 sitzt auf der Übergangskehle zwischen dem zylindrischen Abschnitt 48 und dem Sechskant 24 des Düsenhalters 10 auf und begrenzt die Aufstecktiefe der Schutzkappe 40.A cylindrical section of the protective cap 40 adjoins the wall sections 43 and is guided on the cylindrical section 25 of the nozzle holder 10. The cylindrical section 46 merges at an annular shoulder 50 into a section 52 surrounding the hexagon 24 of the nozzle holder 10 and then into a section 54 surrounding the hexagon 30 of the union nut 12, which section is extended into an enlarged bore section 56 of the housing part 34. The annular shoulder 50 of the protective cap 40 sits on the transition groove between the cylindrical section 48 and the hexagon 24 of the nozzle holder 10 and limits the insertion depth of the protective cap 40.

Die Schutzkappe 40 deckt die aus dem Gehäuse 34, 36 der Brenn­kraftmaschine nach außen herausragenden Teile der Düsenhalter­kombination praktisch bis auf den Gewindestutzen 20 ab, so daß sich zusätzliche Arbeitsgänge zur Oberflächenbehandlung dieser Teile erübrigen. Die Schutzkappe 40 wird nach der Montage der Düsenhalterkombination auf den Düsenhalter 10 aufgesteckt, wobei die zwei durch die Radialschlitze 44 vin­einander getrennten Wandabschnitte 43 des Halsteils 42 federnd hinter den Gewindestutzen 20 rasten, wenn die Ring­schulter 50 zur axialen Anlage an den Düsenhalter 10 kommt. Zum Ausbauen der Einspritzdüse aus dem Gehäuse 34, 36 muß die Schutzkappe 40 entfernt werden, was durch die Feder­elastizität des Halsteils 42 keine Schwierigkeiten bereitet.The protective cap 40 covers the parts of the nozzle holder combination that protrude outward from the housing 34, 36 of the internal combustion engine practically up to the threaded connector 20, so that additional operations for the surface treatment of these parts are unnecessary. The protective cap 40 is fitted onto the nozzle holder 10 after the assembly of the nozzle holder combination, the two wall sections 43 of the neck part 42 separated by the radial slots 44 resiliently latching behind the threaded connector 20 when the annular shoulder 50 comes to rest axially on the nozzle holder 10. To remove the injection nozzle from the housing 34, 36, the protective cap 40 must be removed, which is not a problem due to the spring elasticity of the neck part 42.

Bei der Einspritzdüse nach Figur 2 ist eine Schutzkappe 60 vorgesehen, die nur von der Überwurfmutter 12 nicht über­deckte Bereiche eines Düsenhalters 62 übergreift.In the injection nozzle according to FIG. 2, a protective cap 60 is provided, which only overlaps regions of a nozzle holder 62 that are not covered by the union nut 12.

Die Schutzkappe 60 hat einen zylindrischen Abschnitt 66, der den Sechskant 24 des Düsenhalters 62 übergreift. Der zylin­drische Abschnitt 66 geht an einer Ringschulter 68 in einen nach oben konisch verjüngten Abschnitt 70 über, der den Ab­schnitt 64 des Düsenhalters 62 formgerecht umfaßt. Der Ab­schnitt 70 ist durch zwei nach oben randoffene Aussparungen 72 in zwei federnde Wandabschnitte 74 aufgeteilt, die rastend hinter die untere Ringschulter des Gewindestutzens 20 grei­fen. Die Aussparungen 72 sind so breit ausgeführt, daß sie den freien Zugang zu den Leckölröhrchen 28 ermöglichen. Die Ringschulter 68 begrenzt zusammen mit einer axialen Schulter des Düsenhalters 62 am Übergang zwischen dem Abschnitt 64 und dem Sechskant 24 die axiale Aufstecktiefe der Schutz­kappe 60.The protective cap 60 has a cylindrical section 66 which engages over the hexagon 24 of the nozzle holder 62. The cylindrical section 66 fits into an annular shoulder 68 upwardly conically tapered section 70, which includes the section 64 of the nozzle holder 62 in the correct shape. The section 70 is divided into two resilient wall sections 74 by two upwardly open cutouts 72, which engage behind the lower annular shoulder of the threaded connector 20. The recesses 72 are so wide that they allow free access to the drain oil tubes 28. The annular shoulder 68, together with an axial shoulder of the nozzle holder 62, delimits the axial insertion depth of the protective cap 60 at the transition between the section 64 and the hexagon 24.

Die Schutzkappe 60 ist ferner mit Beschriftungen 76, 78 zur Kennzeichnung der Einspritzdüse versehen, die auf geeignete Art und Weise auf die Schutzkappe aufgebracht sind. Durch diese Maßnahme, die auch bei der Ausführung nach Figur 1 vor­gesehen werden kann, entfällen farbliche Kennzeichnungen oder durch Einrollen hergestellte Beschriftungen am Düsenkör­per 62 bzw. 10. Bei der Montage der zusammengebauten Ein­spritzdüse braucht die Schutzkappe 60 nicht abgenommen zu werden, weil der Sechskant 30 der Überwurfmutter 12 frei zugänglich bleibt.The protective cap 60 is also provided with markings 76, 78 for identifying the injection nozzle, which are applied to the protective cap in a suitable manner. This measure, which can also be provided in the embodiment according to FIG. 1, eliminates color markings or inscriptions on the nozzle body 62 or 10 produced by rolling in. When the assembled injector is assembled, the protective cap 60 does not need to be removed because the hexagon 30 the union nut 12 remains freely accessible.

Claims (8)

1. Kraftstoff-Einspritzdüse für insbesondere selbstzündende Brennkraftmaschinen, mit einem Düsengehäuse, das im eingebau­ten Zustand mindestens über einen Teil seiner Länge aus einer Einbaubohrung des Maschinengehäuses herausragt und von einer Schutzkappe umgeben ist, dadurch gekennzeichnet, daß die Schutzkappe (40, 60) als ein der Form des Düsengehäuses (10, 62) mindestens annähernd angepaßtes eigensteifes Bauteil aus­gebildet und unverlierbar am Düsengehäuse (10, 62) festge­halten ist.1. Fuel injection nozzle for in particular self-igniting internal combustion engines, with a nozzle housing which in the installed state protrudes at least over part of its length from an installation hole in the machine housing and is surrounded by a protective cap, characterized in that the protective cap (40, 60) as one The shape of the nozzle housing (10, 62) is at least approximately adapted to its own rigid component and is captively held on the nozzle housing (10, 62). 2. Einspritzdüse nach Anspruch 1, dadurch gekennzeichnet, daß die Schutzkappe (40, 60) auf das Düsengehäuse (10, 62) aufge­sprengt und durch Rastmittel (43, 74) an diesem festgehalten ist.2. Injection nozzle according to claim 1, characterized in that the protective cap (40, 60) on the nozzle housing (10, 62) is blown open and held by latching means (43, 74) on this. 3. Einspritzdüse nach Anspruch 2, dadurch gekennzeichnet, daß die Schutzkappe (40, 10) aus einem Stoff mit federeiastischen Eigenschaften, vorzugsweise aus Kunststoff besteht und daß die an der Schutzkappe (40, 60) vorgesehenen Rastmittel durch federnd auslenkbare Wandabschnitte (43, 74) der Schutzkappe (40, 60) gebildet sind.3. Injection nozzle according to claim 2, characterized in that the protective cap (40, 10) consists of a material with elastic properties, preferably made of plastic, and that the locking means provided on the protective cap (40, 60) are provided by resiliently deflectable wall sections (43, 74 ) the protective cap (40, 60) are formed. 4. Einspritzdüse nach einem der Ansprüche 1 bis 3, deren mehr­teiliges Düsengehäuse aus einem eine Ventilnadel aufnehmenden Düsenkörper, einem eine Schließfeder aufnehmenden Düsenhalter und einer Überwurfmutter besteht, welche den Düsenkörper gegen den Düsenhalter spannt, dadurch gekennzeichnet, daß die Schutz­kappe (40, 60) den von der Überwurfmutter (12) nicht überdeckten Teil des Düsenhalters (10, 62) mindestens teilweise umschließt.4. Injection nozzle according to one of claims 1 to 3, the multi-part nozzle housing of a nozzle needle receiving a valve body, a closing spring receiving nozzle holder and a union nut which clamps the nozzle body against the nozzle holder, characterized in that the protective cap (40, 60) at least partially surrounds the part of the nozzle holder (10, 62) not covered by the union nut (12). 5. Einspritzdüse nach Anspruch 4,dadurch gekennzeichnet, daß die Schutzkappe (40) auch einen Teil der Überwurfmutter (12) umschließt.5. Injection nozzle according to claim 4, characterized in that the protective cap (40) also encloses part of the union nut (12). 6. Einspritzdüse nach den Ansprüchen 3 und 4, mit einem Düsen­halter, der an seinem stromaufliegenden Stirnende mit einem zentralen Gewindestutzen für den Anschluß einer Kraftstoff­leitung versehen ist, dadurch gekennzeichnet, daß die federnd auslenkbaren Wandabschnitte (43, 74) der Schutzkappe (40, 60) rastend hinter die stromab liegende Ringschulter des Gewinde­stutzens (20) greifen.6. Injection nozzle according to claims 3 and 4, with a nozzle holder which is provided at its upstream end with a central threaded connector for connecting a fuel line, characterized in that the resiliently deflectable wall sections (43, 74) of the protective cap (40, 60 ) click behind the downstream ring shoulder of the threaded connector (20). 7. Einspritzdüse nach Anspruch 6, mit einem Düsenhalter, der mindestens ein Leckölröhrchen zum Anschluß einer Leckölleitung trägt, dadurch gekennzeichnet, daß die Wandabschnitte (43, 74) der Schutzkappe (40, 60) durch Aussparungen (44, 72) in der Schutzkappe (40, 60) voneinander getrennt sind, welche den freien Zugang zu den Leckölröhrchen (28) ermöglichen.7. Injection nozzle according to claim 6, with a nozzle holder which carries at least one leak oil tube for connecting a leak oil line, characterized in that the wall sections (43, 74) of the protective cap (40, 60) through recesses (44, 72) in the protective cap ( 40, 60) are separated from each other, which allow free access to the drain oil tubes (28). 8. Einspritzdüse nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß die Schutzkappe (40, 60) als Infor­mationsträger für die Einspritzdüse dient.8. Injection nozzle according to one of the preceding claims, characterized in that the protective cap (40, 60) serves as an information carrier for the injection nozzle.
EP86115429A 1985-12-12 1986-11-07 Fuel injection nozzle for self-igniting internal-combustion engines in particular Expired - Lifetime EP0225487B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853543901 DE3543901A1 (en) 1985-12-12 1985-12-12 FUEL INJECTION NOZZLE, IN PARTICULAR, SELF-IGNITION, COMBUSTION ENGINES
DE3543901 1985-12-12

Publications (2)

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EP0225487A1 true EP0225487A1 (en) 1987-06-16
EP0225487B1 EP0225487B1 (en) 1990-08-08

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EP86115429A Expired - Lifetime EP0225487B1 (en) 1985-12-12 1986-11-07 Fuel injection nozzle for self-igniting internal-combustion engines in particular

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EP (1) EP0225487B1 (en)
JP (1) JPS62142858A (en)
DE (2) DE3543901A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627232A1 (en) * 1988-02-12 1989-08-18 Bosch Gmbh Robert IDENTIFICATION ELEMENT FOR FUEL INJECTION VALVES
GB2216184A (en) * 1988-02-18 1989-10-04 Daimler Benz Ag I.c engine fuel injector protective cap
WO2007017299A1 (en) * 2005-08-05 2007-02-15 Robert Bosch Gmbh Fuel injector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904773A1 (en) * 1988-02-18 1989-08-31 Daimler Benz Ag Fuel injection nozzle having a protective cap

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902200C (en) * 1950-05-15 1954-01-21 Semt Central fuel valve for internal combustion engines
US3159350A (en) * 1961-03-06 1964-12-01 Bendix Corp Fuel injection valve device
DE1224092B (en) * 1959-07-04 1966-09-01 Kloeckner Humboldt Deutz Ag Injection internal combustion engine
DE2027696A1 (en) * 1970-03-30 1971-10-21 VEB Barkas-Werke Ifa-Kombinat für Kraftfahrzeugteile Renak-Werke, χ 9800 Reichenbach Fuel injection valve for internal combustion engines
FR2091778A5 (en) * 1970-05-22 1972-01-14 Gen Motors Corp
GB2062101A (en) * 1979-10-30 1981-05-20 Bosch Gmbh Robert Fuel injection nozzle for an internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5036259Y2 (en) * 1971-05-12 1975-10-22

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE902200C (en) * 1950-05-15 1954-01-21 Semt Central fuel valve for internal combustion engines
DE1224092B (en) * 1959-07-04 1966-09-01 Kloeckner Humboldt Deutz Ag Injection internal combustion engine
US3159350A (en) * 1961-03-06 1964-12-01 Bendix Corp Fuel injection valve device
DE2027696A1 (en) * 1970-03-30 1971-10-21 VEB Barkas-Werke Ifa-Kombinat für Kraftfahrzeugteile Renak-Werke, χ 9800 Reichenbach Fuel injection valve for internal combustion engines
FR2091778A5 (en) * 1970-05-22 1972-01-14 Gen Motors Corp
GB2062101A (en) * 1979-10-30 1981-05-20 Bosch Gmbh Robert Fuel injection nozzle for an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627232A1 (en) * 1988-02-12 1989-08-18 Bosch Gmbh Robert IDENTIFICATION ELEMENT FOR FUEL INJECTION VALVES
GB2216184A (en) * 1988-02-18 1989-10-04 Daimler Benz Ag I.c engine fuel injector protective cap
GB2216184B (en) * 1988-02-18 1992-01-02 Daimler Benz Ag A fuel injection nozzle with a protective cap.
WO2007017299A1 (en) * 2005-08-05 2007-02-15 Robert Bosch Gmbh Fuel injector

Also Published As

Publication number Publication date
DE3673354D1 (en) 1990-09-13
DE3543901A1 (en) 1987-06-19
JPS62142858A (en) 1987-06-26
EP0225487B1 (en) 1990-08-08

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