EP3097302B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP3097302B1
EP3097302B1 EP14819008.5A EP14819008A EP3097302B1 EP 3097302 B1 EP3097302 B1 EP 3097302B1 EP 14819008 A EP14819008 A EP 14819008A EP 3097302 B1 EP3097302 B1 EP 3097302B1
Authority
EP
European Patent Office
Prior art keywords
needle
fuel injector
recess
armature
injector according
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.)
Not-in-force
Application number
EP14819008.5A
Other languages
German (de)
English (en)
Other versions
EP3097302A1 (fr
Inventor
Armin Schuelke
Walter Fuchs
Axel Bormann
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 EP3097302A1 publication Critical patent/EP3097302A1/fr
Application granted granted Critical
Publication of EP3097302B1 publication Critical patent/EP3097302B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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
    • 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
    • F02M51/0671—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 having an elongated valve body attached thereto
    • F02M51/0682—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 having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering

Definitions

  • the present invention is apparent from a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine according to the species according to the preamble of independent claim 1. More particularly, the present invention relates to a fuel injector having a solenoid actuator for directly actuating a needle body unit liftably received in an inner bore of a nozzle body to open or close at least one injection port, as disclosed in U.S. Patent Nos. 4,174,954 DE102010041013A1 wherein the magnetic actuator comprises a cooperating with an actuator designed as a plunger, annular magnetic coil.
  • the magnetic actuator consists essentially of a magnetic coil and acting as an actuator plunger armature, which is guided radially by a so-called magnetic body.
  • An annular separator of a non-magnetic material surrounding the plunger armature serves to magnetically separate a holding body received in the fuel injector from said magnet body.
  • the plunger armature can essentially consist of an anchor plate and a coupler piston pressed into it, which can be hydraulically coupled via a coupler volume with the nozzle needle, so that caused by the magnetic actuator movement of the armature plate and thus of the coupler piston changes the coupler volume and in this way the Nozzle needle hydraulically operated. More specifically, the described change in the volume of the coupler affects that biased by the spring Nozzle needle so that an induced increase in the Kopplervolumens a pressure drop in the coupler volume and thus has a release of the injection openings through the nozzle needle result. In contrast, the injection openings are closed by a reduction of the coupler volume again.
  • the present invention provides a fuel injector having the features of claim 1.
  • Advantageous developments of the invention are specified in the subclaims.
  • the fuel injector according to the invention is used for injecting fuel into a combustion chamber of an internal combustion engine and has essentially a clamping nut, in which a holding body and a magnetic body are arranged, a so-called needle body unit, which consists of an anchoring needle and a nozzle needle, and one in the Clamping nut recorded magnetic actuator for direct actuation of the liftable in an inner bore of the clamping nut recorded needle body unit on the lifting movement at least one injection port is releasable or closed.
  • the magnetic actuator in this case comprises an annular magnetic coil which is arranged between the holding body and the magnetic body, and acting as an actuator plunger armature which in turn comprises an armature plate and the armature needle and cooperates with the magnetic coil.
  • the anchor plate and the anchoring needle consist in the fuel injector according to the invention of different metal materials and are integrally connected by a material connection.
  • the anchor plate and the anchor needle preferably joined together by welding, such as by laser welding.
  • the armature plate acting as the magnetic field exposed component of the magnetic actuator may be made of a soft magnetic material such as FeCo or an alloy thereof, FeCr, or generally SMC (Soft Magnetic Composites).
  • the Ankernadel serving to guide the actuator of the magnetic actuator may consist of a high-strength metal material, such as the Cr-alloyed steel 100Cr6 or a high-speed steel HS6-5-2-X, that is, with any Co content.
  • a 2-component plunger armature is used in the present invention, consisting of a magnetically actuated section of preferably soft magnetic metal material and a guide portion of high strength metal material.
  • the movements of the armature needle and the nozzle needle are preferably directly coupled directly or with an over / under reduction.
  • a soft magnetic metal material can be used, which offers advantageous properties for the magnetic circuit of the magnetic actuator to be generated. Both materials must be combined to form a component, the plunger armature, in order to form an advantageous one-piece actuator of the magnetic actuator.
  • the difficult to produce compound of these fundamentally different Metal materials are preferably carried out in the fuel injector according to the invention by means of laser welding.
  • the fabric bond between armature plate and anchoring needle produced thereby has the advantage that good strength in the joint can be achieved with minimal space requirements, with materials are interconnected, which are classified in principle as not weldable.
  • An optimization of the seam properties between the two different metal materials, ie between the anchor plate and the armature needle can be achieved with various parameters, such as power of the laser, duration, preheating time, welding speed, etc. of the welding process.
  • the anchoring needle is biased against releasing the at least one injection opening by the nozzle needle by means of a spring element which is secured with a spring plate against the magnetic body, wherein the spring plate is preferably pressed onto the anchoring needle.
  • the spring plate is further preferably made of a ductile, flowable material with high elongation at break, such as stainless steel with the material number 1.4301.
  • a fuel inlet bore is provided with a central recess in the holding body, wherein a serving as an inner pole of the magnetic actuator insert member is inserted with a fuel hole in the recess and connected to the holding body by a positive connection.
  • a serving as an inner pole of the magnetic actuator insert member is inserted with a fuel hole in the recess and connected to the holding body by a positive connection.
  • the form fit between Insert member and recess in the holding body is thereby caused by a plastic deformation of the bottom of the recess facing portion of the insert member, ie by a plastic deformation of the end face portion of the insert member, which first enters the recess when inserting the insert member in the holding body and on the Bottom of the recess meets.
  • a cutting geometry also referred to as a cutting structure or simply as a cutting edge, is preferably provided at the bottom of the recess in the holding body, through which the portion of the insert member facing the bottom of the insert component during insertion the same is plastically deformed into the recess by means of a Zerspanvorgangs.
  • the cutting geometry is in the present invention preferably in the form of an axially projecting from the bottom of the recess annular cutting edge, ie in the form of a so-called cutting ring, which is integrally formed with the holding body or with the bottom of the recess.
  • the cutting geometry is preferably made of a harder material than the insert component.
  • the described Zerspanvorgang a positive process is achieved at the inner pole of the fuel injector according to the invention.
  • the inner pole is thus pressed during installation in the holding body against the cutting ring and further into the surrounding holding body, wherein peeled off by the further pressing in the direction of the Ausappelungs convinceds material from the insert member and pushed radially outward.
  • a ductile, flowable metallic material is used as the material of the insert component, similar to the material of the spring plate which should also have good magnetic properties.
  • the inner diameter of the recess at its bottom is greater than the inner diameter of the remaining recess, whereby a radially outwardly extending annular recess, also referred to as a groove, is formed at the bottom of the recess. Due to the press-fitting process and the associated cutting or cutting operation, the material chopped off by the insert component is pressed radially outward into the groove until it is at least partially or almost completely filled with the plastically deformed portion of the insert component. This results in the desired positive connection between Insertion component and holding body, which ensures a stable fit of the inner pole in the holding body, even with a widening of the holding body as a result of an internal pressure load by the high-pressure fuel injected through the fuel injector.
  • the extrusion forces of the inner pole that is to say the forces required for detaching the inner pole from the holding body, are thus clearly above the values of a pure interference fit between holding body and inner pole.
  • the aforementioned fuel inlet bore is in the holding body a central inlet bore, which passes through the holding body and serves to feed fuel.
  • the central arrangement of the inlet bore has the advantage that the holding body is uniformly acted upon by high pressure and the inlet bore is limited over the circumference of a uniform wall thickness of the holding body, wherein the inlet bore in the insert component continues, which also has a central inlet bore, preferably with in the fuel flow direction narrowing inner diameter. Compared to a decentralized arrangement of the inlet bore thereby the robustness of the holding body is increased.
  • the centrally arranged inlet bore is preferably indirectly connectable via at least one further bore with another body in the fuel injector, the so-called nozzle body, which is arranged at the injecting end of the fuel injector in the clamping nut in contact with the magnetic body and in the at least one injection opening is provided.
  • the at least one further bore can be formed in the actuator, in the magnet body and / or in another body, which is arranged between the magnet body and the nozzle body.
  • the further body is preferably a plate-shaped component which delimits a high-pressure bore of the nozzle body in the axial direction.
  • the components of the needle body unit, so the armature needle and the nozzle needle two separate components which are arranged in contact with each other and cooperate with each other by means of the springs.
  • a direct control for opening and closing the injection openings by means of a Movement of the actuator of the magnetic actuator achieved.
  • the Ankernadel dissolves when opening the nozzle needle.
  • an annular partition member between the holder body and the magnetic body may be disposed radially inside of the solenoid coil, causing magnetic separation between the inner pole and the magnetic body.
  • this magnetic separation serves to ensure that the magnetic flux passes through the plunger armature into the inner pole, whereby stray fluxes are avoided.
  • the armature is arranged inside the annular separating component.
  • the magnetic body may also have a central bore in which the plunger is received liftable. About the magnetic body of the plunger armature thus undergoes an additional radial guidance.
  • the annular separator By having the annular separator concentric with the central bore of the magnetic body and having a bore of equal diameter, the central bore of the magnetic body continues into that of the separator.
  • the annular separating body can also serve the radial guidance of the actuator designed as a plunger armature.
  • the clamping nut and the holding body can be connected to one another by means of a screw connection, wherein preferably the clamping nut has an internal thread and the holding body has a corresponding external thread for forming the screw connection.
  • this screw connection arranged in the clamping nut components of the fuel injector can be braced against each other.
  • the holding body thereby fixes the magnetic coil and the separating body between itself and the magnetic body, and further fixes the nozzle body on the magnetic body with the inside of the clamping nut, ie at the end of the clamping nut on which the nozzle body protrudes from the clamping nut, so that the injection openings after outside exposed.
  • the injector concept according to the invention with its new plunger armature solution for realizing the necessary armature strokes fulfills the need for a contemporary concept for direct-operated diesel injectors with magnetic actuators. Due to the special joining method used in the present invention, space-constrained cramped conditions can be accommodated by making high use of advantageous material properties.
  • the sole figure of the present invention is a sectional view of a portion of a fuel injector according to the preferred embodiment of the invention.
  • the illustrated in the figure fuel injector comprises a clamping nut 1 with an inner bore 11 in which a holding body 2 is inserted and is connected to the chip nut 1 by a screw, wherein the screw by an internal thread 12 on the inner circumference of the inner bore 11 and an external thread 23 is made on the outer circumference of the holding body 2.
  • a magnetic body 3 and a needle body unit 4 is arranged in the clamping nut 1.
  • the needle body unit 4 is formed in the preferred embodiment by an anchor needle 41 and a nozzle needle 42 which are in abutting contact with each other when the magnetic circuit is not activated and cooperate, and is guided in the clamping nut 1 in a liftable manner.
  • the lifting movement of the needle body unit 4 serves to release or close injection openings (not shown) which are formed in a nozzle body 9.
  • the nozzle needle 42 of the needle body unit 4 must be lifted out of a valve seat (not shown).
  • a valve seat In a guide region of the nozzle needle 42 is ensuring the connection via outer peripheral side polished sections 421, which form flow channels.
  • a magnetic actuator 5 which comprises an annular magnetic coil 51 which cooperates with a plunger armature 52 acting as an actuator, which is composed of an anchor plate 53 and the anchor needle 41.
  • the armature plate 53 which consists of a soft magnetic material, is laser welded at an interface 521 with the anchoring needle 41 made of a high strength material.
  • the plunger armature 52 is received in a liftable manner in a central bore 31 of the magnet body 3.
  • the magnetic body 3 has an annular end face 32, on which the magnetic coil 51 is supported, wherein the annular end face 32 of the magnetic body 3 is designed to be stepped radially outwards.
  • the magnetic body 3 forms in this way, together with the inner circumference of the inner bore 11 of the clamping nut 1, an annular groove in which the magnetic coil 51 is partially received.
  • the solenoid coil 51 is also applied to the holding body 2, which has a diameter-reduced outer peripheral portion 24 for flush insertion of the magnetic coil 51.
  • an annular separator 55 made of a nonmagnetic material is disposed between the holder body 2 and the magnet body 3 and bears against an annular projection 33 of the magnet body 3 which engages in the magnet coil 51.
  • the annular separating body 55 is therefore surrounded by the inner circumference of the magnetic coil 51.
  • Another support results from the holding body 2, which has a protruding projection 25 with reduced outer diameter. With this approach 25, the holding body 2 engages in the annular separating body 55, wherein between the holding body 2 and the plunger armature 52, a working air gap is formed.
  • the holding body 2 has a recess 22 in which an insert component 54 consisting of ductile metal is inserted, which forms an inner pole of the magnetic actuator 5.
  • the insert member 54 is plastically deformed when inserted into the recess 22 on a holding body 2 facing end portion 542 by a present in the form of a cutting edge cutting edge 222, the bottom 221 of the recess 22nd is provided, which deforms the bottom 221 of the recess 22 facing portion 542 of the insert member 54 when inserting the same in the recess 22 by a Zerspanvorgang plastically.
  • the insert member 54 is thus pressed during installation in the holding body 2 against the cutting edge 222 in the surrounding holding body 2, wherein by the further pressing in the direction of the cutting edge 222 material from the insert member 54 is peeled off.
  • An inner diameter of the recess 22 at the bottom 221 is greater than the inner diameter of the remaining recess 22 in the preferred embodiment of the injector according to the invention, whereby a radially outwardly extending groove 223 at the bottom 221 of the recess 22 is formed.
  • the chipped material of the portion 542 of the insert component 54 is pressed into the groove 223 until it is at least partially or almost completely filled with the plastically deformed portion 542 of the insert component 54.
  • the insert component 54 is shown in the figure in a state prior to machining, ie in the still undeformed state, in which no machining material is still present in the groove 223.
  • In the insert member 54 also has a continuous, narrowing bore 541 is provided, which connects the fuel inlet bore 21 with the working gap between the holding body 2 and the magnetic body 3 and thus with the bore 531 in the anchor plate 53.
  • the holding body 2 is penetrated by a central fuel inlet bore 21, which serves to feed fuel and is connected via further bores 531 and 31 to a high-pressure bore 91 of the nozzle body 9.
  • the further bore 531 is arranged in the anchor plate 53 and running obliquely, ie from the center to the radially outward. It has an inner peripheral side polished section 34, which connects the central bore 21 with a magnetic body recess 35 of the magnetic body 3, which is limited nozzle needle side of a plate-shaped body 36. Alternatively, corresponding bevels may be provided on the anchoring needle 41.
  • a recess 361 is provided, which connects the magnetic body recess 35 with the high-pressure bore 91 of the nozzle body 9.
  • a spring 362 is further provided, which is clamped over the plate-shaped body 36 against the magnetic body 3, so that the body 36 is kept pressed constantly against the nozzle body 9.
  • the armature needle 41 is held in a liftable manner in the plate-shaped body 36.
  • the energization of the solenoid 51 is terminated, wherein the spring force of the spring 6, which is supported on the one hand on the magnetic body 3 and on the other hand on a spring plate 7, a provision of the plunger armature 52 causes.
  • the spring plate 7 consists of a ductile metal and is pressed onto the anchor needle 41.
  • the energization of the magnetic coil 51 is achieved via at least one (not shown) electrical line which is passed through the holding body 2 and terminates in an electrical connection, via which the fuel injector with a (not shown) power source is connectable.
  • the illustrated fuel injector is characterized by a high degree of robustness and a precise magnetic performance.

Claims (11)

  1. Injecteur de carburant destiné à injecter du carburant dans une chambre de combustion d'un moteur à combustion interne, l'injecteur de carburant comprenant un écrou de serrage (1) dans lequel sont disposés un corps de retenue (2) et un corps magnétique (3), une unité à corps d'aiguille (4) qui comprend une aiguille d'induit (41) et une aiguille de buse (42), et un actionneur magnétique (5) reçu dans l'écrou de serrage (1) et destiné à actionner directement l'unité à corps d'aiguille (4) reçue dans un alésage intérieur (11) de l'écrou de serrage (1) de manière à effectuer un mouvement de levage permettant de libérer ou de fermer au moins une ouverture d'injection, l'actionneur magnétique (5) comprenant une bobine magnétique annulaire (51) qui est disposée entre le corps de retenue (2) et le corps magnétique (3) et qui comprend un induit plongeur (52) servant d'actionneur, et l'induit de plongeur (52) comportant une plaque d'induit (53) et l'aiguille d'induit (41) et coopérant avec la bobine magnétique (51), la plaque d'induit (53) et l'aiguille d'induit (41) comprenant différents matériaux et étant reliées l'une à l'autre d'une seule pièce par une liaison de matière, caractérisé en ce que
    un orifice d'entrée de carburant (21) est prévu qui est pourvu d'un évidement central (22) ménagé dans le corps de retenue (2) et un élément d'insertion (54) servant de pôle intérieur de l'actionneur magnétique et pourvu d'un alésage (541) est inséré dans l'évidement (22) et est relié au corps de retenue (2) par une liaison par complémentarité de formes obtenue par une déformation plastique d'une partie (542) de l'élément d'insertion (54) faisant face au fond (221) de l'évidement (22), le diamètre intérieur de l'évidement (22) étant supérieur, au niveau du fond (221) de celui-ci, au diamètre intérieur du reste de l'évidement (22), de manière à former une gorge annulaire (223) s'étend radialement vers l'extérieur au niveau du fond de l'évidement (22), laquelle gorge est remplie au moins partiellement avec la partie (542) déformée plastiquement de l'élément d'insertion (54).
  2. Injecteur de carburant selon la revendication 1, la plaque d'induit (53) et l'aiguille d'induit (41) étant reliées l'une à l'autre par soudage, de préférence par soudage laser.
  3. Injecteur de carburant selon la revendication 1 ou 2, la plaque d'induit (53) étant formée d'un matériau magnétique doux et l'aiguille d'induit (41) étant formé d'un matériau à haute résistance.
  4. Injecteur de carburant selon l'une des revendications précédentes, l'aiguille d'induit (41) étant précontrainte au moyen d'un ressort (6) pour empêcher la libération de l'au moins une ouverture d'injection par l'aiguille de buse (42), lequel ressort est fixé à une plaque de ressort (7) contre le corps magnétique (3), la plaque de ressort (7) étant pressée de préférence sur l'aiguille d'induit (41).
  5. Injecteur de carburant selon la revendication 4, la plaque de ressort (7) étant formée d'un matériau ductile à allongement à la rupture élevé.
  6. Injecteur de carburant selon la revendication 1, un bord tranchant (222) étant prévu au niveau du fond (221) de l'évidement (22), lequel bord tranchant permet de déformer plastiquement la partie (542) de l'élément d'insertion (54) qui fait face au fond (221) de l'évidement (22) lors de l'insertion dudit élément d'insertion dans l'évidement (22), le bord tranchant (222) se présentant de préférence sous la forme d'un bord tranchant (222) saillant du fond (221) de l'évidement (22).
  7. Injecteur de carburant selon la revendication 6, le bord tranchant (222) étant formé d'un matériau plus dur que celui de l'élément d'insertion (54).
  8. Injecteur de carburant selon l'une des revendications 6 ou 7, l'élément d'insertion (54) étant formé de préférence d'un matériau métallique ductile.
  9. Injecteur de carburant selon l'une des revendications précédentes, l'aiguille d'induit (41) et l'aiguille de buse (42) étant reliées fonctionnellement l'une à l'autre.
  10. Injecteur de carburant selon l'une des revendications précédentes, un corps de séparation annulaire (55) étant disposé radialement à l'intérieur de la bobine magnétique (51) entre le corps de retenue (2) et le corps magnétique (3).
  11. Injecteur de carburant selon l'une des revendications précédentes, l'écrou de serrage (1) et le corps de retenue (2) étant reliés l'un à l'autre au moyen d'une liaison à vis, l'écrou de serrage (1) comportant de préférence un filetage intérieur (12) et le corps de retenue (2) comportant un filetage extérieur correspondant (23) pour former la liaison à vis.
EP14819008.5A 2014-01-20 2014-12-22 Injecteur de carburant Not-in-force EP3097302B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014200884.0A DE102014200884A1 (de) 2014-01-20 2014-01-20 Kraftstoffinjektor
PCT/EP2014/079051 WO2015106937A1 (fr) 2014-01-20 2014-12-22 Injecteur de carburant

Publications (2)

Publication Number Publication Date
EP3097302A1 EP3097302A1 (fr) 2016-11-30
EP3097302B1 true EP3097302B1 (fr) 2019-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14819008.5A Not-in-force EP3097302B1 (fr) 2014-01-20 2014-12-22 Injecteur de carburant

Country Status (4)

Country Link
EP (1) EP3097302B1 (fr)
CN (1) CN105917109B (fr)
DE (1) DE102014200884A1 (fr)
WO (1) WO2015106937A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3053409A1 (fr) * 2016-06-30 2018-01-05 Delphi International Operations Luxembourg S.A R.L. Injecteur de carburant
DE102019121538A1 (de) * 2019-08-09 2021-02-11 Liebherr-Components Deggendorf Gmbh Sitzplatte für einen Injektor und Verfahren zum Herstellen einer solchen Sitzplatte

Citations (1)

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DE102014200884A1 (de) 2015-07-23
CN105917109B (zh) 2019-04-02
WO2015106937A1 (fr) 2015-07-23
EP3097302A1 (fr) 2016-11-30
CN105917109A (zh) 2016-08-31

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