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EP1789673B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1789673B1
EP1789673B1 EP05749768A EP05749768A EP1789673B1 EP 1789673 B1 EP1789673 B1 EP 1789673B1 EP 05749768 A EP05749768 A EP 05749768A EP 05749768 A EP05749768 A EP 05749768A EP 1789673 B1 EP1789673 B1 EP 1789673B1
Authority
EP
European Patent Office
Prior art keywords
injection
valve seat
valve
plastic
plastic 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.)
Expired - Lifetime
Application number
EP05749768A
Other languages
German (de)
English (en)
Other versions
EP1789673A1 (fr
Inventor
Johann Bayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1789673A1 publication Critical patent/EP1789673A1/fr
Application granted granted Critical
Publication of EP1789673B1 publication Critical patent/EP1789673B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors 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
    • F02M51/0685—Injectors 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 the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M61/166—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/04—O-ring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/19—Nozzle materials

Definitions

  • the invention relates to an injection valve for fuel injection, in particular for internal combustion engines of motor vehicles, according to the preamble of claim 1.
  • the connecting piece is rotated from a steel tube, which receives the wound with the exciter winding plastic coil carrier of the electromagnet and at the same time forms the magnetic core of the electromagnet.
  • the likewise made of a steel tube valve seat carrier is attached to the underside of the bobbin and partially surrounds the connected to the plastic valve needle armature which is slidably guided in the valve seat carrier and partially protruding into the bobbin.
  • the magnetic inference between the magnetic core or connecting piece and the magnet armature is formed by a sleeve-shaped, ferromagnetic intermediate piece which is fixed between coil carrier and connecting piece or magnetic core and the magnet armature includes a sliding over the connecting piece or magnetic core protruding portion slidably.
  • the magnet armature is hard chromed to protect against wear.
  • the plastic valve needle is molded onto the magnet armature.
  • the injection valve according to the invention with the features of claim 1 has the advantage of simpler and less expensive production, since the injection valve is composed in comparison to the known injectors of significantly fewer components, in addition can still be produced by simple spraying.
  • the reduced number of components requires fewer assembly steps, thus less assembly time and less effort for automatic assembly machines and joining stations.
  • the production sections are limited to the insertion of the magnet core occupied in the magnetic core in an injection mold, the injection molding of the magnetic material return element, the subsequent encapsulation of the magnetic element and iron core return element for the production of the plastic housing and the joining of valve member with valve closing spring and valve seat carrier with spray perforated disc in the prefabricated plastic housing.
  • the production steps for spraying can be carried out with a so-called cube system, in which a cuboid injection mold with vertical parting planes is used, which is rotated by 90 ° after each production step to carry out the next production step.
  • the magnetic coil supporting, cylindrical magnetic core is inserted, at 90 °, the encapsulation of magnetic coil and magnetic core with the magnetic material, creating a gapless connection to the magnetic core is created, at 180 °, the plastic encapsulation takes place for the production of the plastic housing and at 270 ° the finished plastic housing with valve seat carrier formed thereon and connecting piece and connector for the solenoid is removed.
  • labyrinth seals are provided between the plastic housing and the magnetic coil surrounding the magnetic coil, preferably made of each one produced in the injection molding tool, concentric with the magnetic core toothing between magnetic material encapsulation and sprayed plastic housing.
  • This labyrinth seal in conjunction with the use of fuel-tight plastic for the plastic housing, prevents fuel from leaking out of the fuel flow path.
  • the magnetic coil has a pushed onto the magnetic core or sprayed coil carrier made of plastic and wound on the coil carrier excitation winding.
  • concentric circumferential labyrinth seals are provided, preferably each consists of a toothing between coil carrier and sprayed magnetic material encapsulation.
  • the coil carrier and the field winding is wound from baked enamel wire directly on the magnetic core.
  • valve member is made of plastic and carries a cooperating with the valve seat body elastomeric seal for sealing the valve opening with respect to the fuel flow path.
  • Valve member with elastomeric seal are produced in a two-component injection molding process.
  • the armature arranged on the valve member consists of a magnetically conductive plastic, wherein valve member, elastomeric seal and armature are made in a three-component injection molding process. This brings additional cost reduction due to simplified manufacture of the valve member with it.
  • valve seat body having the valve opening is likewise made of plastic and, after being joined in the valve seat carrier area of the plastic housing, is preferably firmly connected to the plastic housing by laser beam welding.
  • valve seat body can be made in the usual way of metal, sealed with respect to the plastic housing with a ring seal and secured by means of a verkrallenden in the plastic housing spray orifice plate against axial displacement.
  • FIG. 1 in longitudinal section shown injection valve for fuel injection systems, in particular of motor vehicles has a plastic housing 10 made of a fuel-tight plastic, at one end of a connection piece 12 and at the other end a valve seat carrier 13 is formed.
  • Connecting piece 12 and valve seat carrier 13 are integrally assembled with a lying between them plastic sheath 11 to the complete plastic housing 10.
  • the connecting piece 12 serves to connect the injection valve to a fuel supply line 30, a so-called rail.
  • the valve seat carrier 13 accommodates a valve seat body 14, in which a valve opening 15 enclosed by a valve seat 141 is arranged.
  • the valve opening 15 is connected via an existing in the interior of the plastic housing 11 Kraftstoffsströmströmpfad 16 with the connection piece 12 in connection.
  • a valve member 17 cooperating with a valve seat 141 formed on the valve seat body 14 serves to control the valve opening 15 for ejecting fuel via the valve opening 15.
  • the valve member 17 is pressed onto the valve seat 141 by a valve closing spring 18, thereby closing the valve opening 15.
  • An electromagnet 19 is used to open the injection valve by the valve member 17 is lifted by energizing the electromagnet 19 against the force of the valve closing spring 18 from the valve seat 141.
  • the electromagnet 19 is enclosed by the plastic casing 11 which lies between the connecting piece 12 and the valve seat carrier 13 and integrally connects them to one another.
  • the electromagnet 19 consists of a hollow cylindrical magnetic core 20 made of ferromagnetic material, through which the fuel flow path 16 is passed, a solenoid 21, a valve member 17 attached to the armature 22, which also has an axial bore for the plastic flow path 16 and coaxial with the magnetic core 20th is arranged, and a magnetic circuit via magnetic core 20 and armature 22 closing magnetic return element 23rd
  • the solenoid 21 is disposed directly on the magnetic core 20 and the magnetic core 20 is inserted with magnetic coil 21 in an injection mold and this for producing the return element 23 with a magnetically conductive material, called magnetic material, encapsulated , wherein a gapless connection of the magnetic material extrusion coating 24 with the magnetic core 20 is produced.
  • the thus prefabricated unit is placed in another injection mold, with which the plastic housing 10 is injected.
  • the assembly is surrounded by the plastic casing 11 and at the same time molded the areas of connecting pieces 12 and valve seat carrier 13 to the plastic casing 11 with.
  • the injection molding tool, the finished plastic housing 10 is removed, in which already the complete electromagnet 19 - with the exception of the armature 22 - is integrated.
  • the magnet coil 21 has a coil carrier 26 made of plastic and an exciter winding 27 made of anchor lacquer wire wound onto the coil carrier 26.
  • the excitation winding 27 is wound onto the prefabricated coil carrier 26 and connected with its winding ends on the coil carrier 26 held connector pins 25.
  • the wound bobbin 26 is pushed onto the magnetic core 20.
  • the bobbin 26 is made by molding the magnetic core 20 with a plastic and then wound the exciter winding 27 and covered with the connector pins 25.
  • each labyrinth seal 29 is realized by a toothing between the adjacent components, ie magnetic material encapsulation 24 and plastic housing 10 on the one hand and magnetic material encapsulation 24 and bobbin 26 on the other hand.
  • valve closing spring 18, valve member 17 with magnet armature 22 fastened thereto and valve seat body 14 must be inserted into the plastic housing 10 in the plastic housing 10 with integrated electromagnet 19.
  • the valve seat body 14 is positioned in the region of the valve seat carrier 13 of the plastic housing 10 with high precision and fixed axially immovable on the plastic housing 10.
  • the recorded in the magnetic core 20 valve closing spring 18 is supported on the armature 20 and on an inserted into the magnetic core 20 and fixed therein adjusting sleeve 31 from. By means of the adjusting sleeve 31, the bias of the valve closing spring 18 is fixed.
  • the valve seat body 14 is still a spray orifice plate 32 downstream with spray holes 33 in the fuel flow direction, which is attached either to the plastic housing 10 or the valve seat body 14 so that the fuel is discharged through the injection holes 33 of the injection orifice 32 with the injection valve open from the valve opening 15 exiting fuel.
  • the injection valve is sealed by means of a sealing ring 34 with respect to the bore wall in the cylinder head of an internal combustion engine or an internal combustion engine and attached with its designed as a connecting piece 12 portion of the plastic housing 10 to the fuel supply line 30 or rail and fuel-tight connected thereto by laser beam welding.
  • Fig. 1 consists of the sleeve-shaped, closed at one end of the sleeve and provided with passage openings 173 for the fuel valve member 17 made of plastic and is provided in its coming into contact with the valve seat 141 on the valve seat body 14 end portion with an elastomeric seal 35 which is closed with the injection valve on the valve seat 141st presses and thus the valve opening 15 against the Kraflstoffströmungspfad 16 seals.
  • Valve member 17 and elastomer seal 35 are advantageously prepared in a two-component injection molding process.
  • the gas tanker 22 is attached to the valve needle 17 as a separate component.
  • the armature 22 is made of a magnetically conductive plastic (magnetic plastic) and manufactured together with the valve member 17 and the elastomeric seal 35 in a three-component injection molding process.
  • Fig. 1 is also the valve seat body 14 made of plastic and fixed by laser beam welding in the plastic housing 10.
  • a resilient annular region 321 is formed, which is prestressed and "bites” with an annular edge 322 due to its over-springing in the inner wall of the plastic housing 10.
  • FIG. 5 sketched alternative embodiment of the existing plastic valve seat body 14 of the valve seat body 14 carries on its the spray orifice plate 32 facing Bottom integrally formed pins 36 which can be passed through congruent openings 37 in the spray perforated disk 32.
  • the spray perforated disk 32 is placed on the underside of the valve seat body 14 so that the pins 36 protrude through the openings 37. Subsequently, the pins 36 are deformed in their over the spray perforated disk 32 projecting end portion, for example by means of ultrasound or hot stamping, so that a kind of plastic rivet connection between the valve seat body 14 and the spray perforated disk 32 is formed.
  • the injection valve according to the in Fig. 2 illustrated embodiment is modified in some points compared to the injection valve described above.
  • the coil carrier is dispensed with and the exciter winding 27 of baked enamel wire is wound directly onto the hollow cylindrical magnet core 20.
  • the winding ends of the field winding 27 are fixed in a plastic part enclosed by the magnetic material encapsulation 24.
  • piece of detail 38 lead connected to the winding ends of the excitation winding 27 connector pins 39 through the plastic housing 10 therethrough.
  • the plastic part 38 with the plug pins 39 connected to the exciter winding 27 is inserted into the injection mold during injection molding of the magnetic material encapsulation 24 and is thus already fixed in the subsequent spraying of the plastic housing 10.
  • the fuel supply line 30 or rail is provided with sockets 40, which are arranged in a recess 31 and are contacted when pushing the integrally formed on the plastic housing 10 connecting piece 12 to the fuel supply line 30 by the plug sockets 40 are inserted into the plug pins 39.
  • the sockets 40 are connected to not shown electrical connection lines for energizing the field winding 27.
  • sealing rings 42 are arranged, each sealing a plug pin 39 on the plastic housing 10 facing underside of the female connector 40 against the wall of the recess 41 in the fuel supply line 30.
  • the sealing ring 42 can be omitted if the plug pins 39 are provided with a structuring 47, for example a toothing or strong corrugation.
  • the structuring 47 is in Fig. 2 In addition, indicated in a section region of the plug pin 39 Since the materials of plastic casing 11 and pins 39 have different coefficients of thermal expansion, there is a mutual Verb Formen plastic casing 11 and pins 39 in the structuring 47 and thus to a liquid-tight sealing of the plug pins 39th
  • valve seat body 14 in a conventional manner made of metal and sealed by means of a sealing ring 43 which rests in a circumferential groove 44 in the valve seat body 14, relative to the inner wall of the plastic housing 10.
  • the valve seat body 14 downstream spray orifice plate 32 is formed in the same way and fixed in the plastic housing 10, as is Fig. 1 is described.
  • the valve seat body 14 is attached to the spray perforated disk 32, for example by laser beam welding, and is determined by the in the inner wall of the plastic housing 10 verb administratende annular edge 322 of the spray perforated disk 32 axially immovable.
  • the valve member 17 is made of metal in a conventional manner and consists of a sleeve-shaped valve needle 171 with radial bores 174 for passage of fuel and a welded on the end face of the valve needle 171 valve closing head 172, which cooperates with the valve seat body 14 formed on the valve seat 141.
  • the magnet armature 22 is placed on the valve closing head 172 facing away from the end of the valve needle 171 and welded thereto.
  • valve seat body 14 In 3 and 4 Two further embodiments for fastening a valve seat body 14 made of metal in the plastic housing 10 are shown.
  • the valve seat body 14 contributes as the valve seat body 14 in Fig. 2 a circumferential groove 44, in which the seal against the inner wall of the plastic housing 10 sealing ring 43 rests.
  • the valve seat body 14 and the spray perforated disk 32 are fixed by means of a spring-loaded and prestressed profile ring 45, which digs into the wall of the plastic housing 10 with its sawtooth-like profile formed on the outer circumference.
  • valve seat body 14 is widened in the pressing-in, ie it has a diameter increasing in the pressing-in direction. At its largest diameter end face a profile edge 46 is formed, which digs into the inner wall of the plastic housing 10 and thus prevents further axial displacement of the valve seat body 14.
  • the spray perforated disk 32 is fastened to the underside of the valve seat body 14, for example by welding.

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

Claims (16)

  1. Soupape d'injection pour l'injection de carburant en particulier pour des moteurs à combustion interne dans des véhicules automobiles, comprenant une tubulure de raccordement (12) pour une conduite d'amenée de carburant (30), qui est en liaison par le biais d'un chemin d'écoulement de carburant (16) avec une ouverture de soupape (15), un support de siège de soupape (13), sur lequel est fixé un corps de siège de soupape (14) portant l'ouverture de soupape (15), un organe de soupape (17) disposé à l'intérieur du support de siège de soupape (13) pour commander l'ouverture de soupape (15), un électroaimant (19) actionnant l'organe de soupape (17), qui présente un induit magnétique (22) disposé sur l'organe de soupape (17), un noyau magnétique (20) coaxial à l'induit magnétique (22), une bobine magnétique (21) entourant le noyau magnétique (20) et un élément de culasse (23) fermant le circuit magnétique par le biais du noyau magnétique (20) et de l'induit magnétique (22), et un gainage en plastique (11) entourant la tubulure de raccordement (12), l'électroaimant (19) et le support de siège de soupape (13), caractérisée en ce que la tubulure de raccordement (12) et le support de siège de soupape (13) se composent de plastique et sont réalisés conjointement avec le gainage en plastique (11) sous forme de boîtier en plastique d'une seule pièce (10), et en ce que l'élément de culasse (23) est formé par un surmoulage en un matériau magnétique (24) de la bobine magnétique (21), qui se raccorde sans jeu au noyau magnétique (20) et qui se termine avec un certain entrefer avant l'induit magnétique (22).
  2. Soupape d'injection selon la revendication 1, caractérisée en ce que le boîtier en plastique (10) est fabriqué par surmoulage du noyau magnétique (20) et du surmoulage (24) en matériau magnétique entourant la bobine magnétique (21), avec de préférence un plastique étanche au carburant.
  3. Soupape d'injection selon la revendication 2, caractérisée en ce qu'entre le surmoulage en matériau magnétique (24) et le boîtier en plastique (10) sont prévus des joints à labyrinthe (28) servant à l'étanchéité vis-à-vis du chemin d'écoulement de carburant (16), et de préférence en ce que chaque joint à labyrinthe (28) se compose d'une denture entre le surmoulage en matériau magnétique (24) et le boîtier en plastique surmoulé par injection (10).
  4. Soupape d'injection selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la bobine magnétique (21) présente un support de bobine (26) en plastique surmoulé par injection ou poussé sur le noyau magnétique (20) et un enroulement excitateur (27) enroulé sur le support de bobine (26), et de préférence en ce que les extrémités de raccordement de l'enroulement excitateur (27) sont fixées sur le support de bobine (26) et viennent en contact à cet endroit avec des broches de connexion (39) guidées à travers le boîtier en plastique (10).
  5. Soupape d'injection selon la revendication 4, caractérisée en ce qu'entre le support de bobine (26) et le surmoulage en matériau magnétique (24) sont prévus des joints à labyrinthe (29) servant à l'étanchéité vis-à-vis du chemin d'écoulement de carburant (16), et de préférence en ce que chaque joint à labyrinthe (29) se compose d'une denture entre le support de bobine (26) et le surmoulage en matériau magnétique surmoulé par injection (24).
  6. Soupape d'injection selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la bobine magnétique (21) présente un enroulement excitateur (27) enroulé directement sur le noyau magnétique (20), et de préférence en ce que les extrémités de raccordement de l'enroulement excitateur (27) viennent en contact avec des broches de connexion (39) guidées à travers le boîtier en plastique (10), fixées dans une partie en plastique (38) incorporée dans le surmoulage en matériau magnétique (24).
  7. Soupape d'injection selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'organe de soupape (17) se compose de plastique et porte dans sa région de contact avec le corps de siège de soupape (14) un joint élastomère (35) réalisant l'étanchéité vis-à-vis de l'ouverture de soupape (15).
  8. Soupape d'injection selon la revendication 7, caractérisée en ce que l'organe de soupape (17) avec le joint en élastomère (35) est fabriqué dans un procédé de moulage par injection à deux composants.
  9. Soupape d'injection selon la revendication 7, caractérisée en ce que l'induit magnétique (22) disposé sur l'organe de soupape (17) se compose d'un plastique magnétiquement conducteur et en ce que l'organe de soupape (17) avec le joint en élastomère (35) et l'induit magnétique (22) est fabriqué dans un procédé de moulage par injection à trois composants.
  10. Soupape d'injection selon l'une quelconque des revendications 1 à 9, caractérisée en ce qu'un disque perforé d'injection (32), placé derrière le corps de siège de soupape (14) dans la direction d'écoulement du carburant, est disposé dans le support de siège de soupape (13).
  11. Soupape d'injection selon la revendication 10, caractérisée en ce qu'une région annulaire élastique (321) est réalisée sur le disque perforé d'injection (32), laquelle est précontrainte et mord avec une arête annulaire (322) dans le boîtier en plastique (10), et en ce que le corps de siège de soupape (14) est fixé sur le disque perforé d'injection (32) ou sur le boîtier en plastique (10).
  12. Soupape d'injection selon la revendication 10, caractérisée en ce que le disque perforé d'injection (32) et le corps de siège de soupape (14) dans le support de siège de soupape (13) sont fixés au moyen d'une bague profilée fendue et précontrainte (45), enfoncée dans le support de siège de soupape (13), qui porte un profilé extérieur (451) s'incrustant dans la paroi interne du boîtier en plastique (10).
  13. Soupape d'injection selon la revendication 10, caractérisée en ce que le corps de siège de soupape (14) présente un diamètre augmentant dans sa direction de pressage dans le support de siège de soupape (13), et porte à son extrémité frontale possédant le plus grand diamètre, une arête profilée (46) s'incrustant dans la paroi interne du boîtier en plastique (10).
  14. Soupape d'injection selon l'une quelconque des revendications 1 à 13, caractérisée en ce que le corps de siège de soupape (14) présente une rainure périphérique (44) et en ce qu'une bague d'étanchéité (43) réalisant l'étanchéité vis-à-vis de la paroi interne du boîtier en plastique (10) est introduite dans la rainure périphérique (44).
  15. Soupape d'injection selon la revendication 10, caractérisée en ce que le corps de siège de soupape (14) se compose de plastique et est fixé sur le boîtier en plastique (10) de préférence par soudage au laser, et en ce que le corps de siège de soupape (14) porte sur son côté inférieur tourné vers le disque perforé d'injection (32) des tourillons (36) qui pénètrent à travers des ouvertures coïncidentes (37) dans le disque perforé d'injection (32) et qui sont façonnés sous forme de têtes de rivets du côté du disque perforé d'injection (32) opposé au corps de siège de soupape (14).
  16. Soupape d'injection selon l'une quelconque des revendications 6 à 15, caractérisée en ce que les broches de connexion (39) sont pourvues, au moins en partie, d'une structuration (47), de préférence d'une denture ou d'une forte cannelure.
EP05749768A 2004-07-09 2005-04-29 Soupape d'injection de carburant Expired - Lifetime EP1789673B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004033280A DE102004033280A1 (de) 2004-07-09 2004-07-09 Einspritzventil zur Kraftstoffeinspritzung
PCT/EP2005/051954 WO2006005639A1 (fr) 2004-07-09 2005-04-29 Soupape d'injection de carburant

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EP1789673A1 EP1789673A1 (fr) 2007-05-30
EP1789673B1 true EP1789673B1 (fr) 2010-02-10

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US (1) US7571868B2 (fr)
EP (1) EP1789673B1 (fr)
JP (1) JP4589387B2 (fr)
CN (1) CN100529379C (fr)
DE (2) DE102004033280A1 (fr)
WO (1) WO2006005639A1 (fr)

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Also Published As

Publication number Publication date
JP4589387B2 (ja) 2010-12-01
JP2008506058A (ja) 2008-02-28
WO2006005639A1 (fr) 2006-01-19
CN100529379C (zh) 2009-08-19
US20080061171A1 (en) 2008-03-13
DE502005009000D1 (de) 2010-03-25
US7571868B2 (en) 2009-08-11
CN1985087A (zh) 2007-06-20
DE102004033280A1 (de) 2006-02-02
EP1789673A1 (fr) 2007-05-30

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