EP0571413B1 - Injecteur de carburant à bille - Google Patents

Injecteur de carburant à bille Download PDF

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Publication number
EP0571413B1
EP0571413B1 EP92903597A EP92903597A EP0571413B1 EP 0571413 B1 EP0571413 B1 EP 0571413B1 EP 92903597 A EP92903597 A EP 92903597A EP 92903597 A EP92903597 A EP 92903597A EP 0571413 B1 EP0571413 B1 EP 0571413B1
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EP
European Patent Office
Prior art keywords
sphere
fuel
bar
fuel injector
seat
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
EP92903597A
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German (de)
English (en)
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EP0571413A1 (fr
Inventor
Paul Desmond Daly
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Siemens AG
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Siemens AG
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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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details not otherwise provided for
    • 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
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0646—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being a short body, e.g. sphere or cube
    • F02M51/065—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being a short body, e.g. sphere or cube the valve being spherical or partly spherical
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/21—Engine cover with integrated cabling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems

Definitions

  • This invention relates to fuel injectors for internal combustion engines.
  • Conventional fuel rails for fuel-injected internal combustion engines comprise sockets which are spaced apart along the fuel rail's length and into which the fuel injectors are inserted.
  • the fuel injectors are retained in fluid-tight relation to the fuel rail by suitable sealing and retention means.
  • the typical fuel injector has an elongated shape and is customarily arranged on the fuel rail such that the long dimension of the injector is transverse to the long dimension of the fuel rail.
  • the envelope that is occupied by the fuel rail assembly in the engine compartment of an automotive vehicle will have an extent transverse to the fuel rail that is determined by the long dimension of the fuel injector.
  • the fuel rail may comprise a circular cylindrical-walled tube within which the fuel injectors are essentially entirely disposed so that the transverse dimension of the fuel rail assembly at the location of a fuel injector is essentially that of the O.D. of the tube.
  • the fuel injectors are mounted on a carrier to form a sub-assembly that is assembled into the tube by endwise insertion.
  • the electrical leads for the fuel injectors run along the carrier to a receptacle that is at one lengthwise end of the completed fuel rail assembly.
  • the injectors' tip ends from which liquid fuel is injected are seated in a sealed manner in holes in the sidewall of the tube.
  • the fuel injectors themselves are unique. Rather than having a solenoid, an armature, a needle, and a seat coaxially arranged along the length of the fuel injector, as in conventional fuel injectors, the fuel injector of the present invention has a magnetic circuit that encircles a spherical valve element. This sphere is resiliently urged by a cantilever spring blade toward closure of a hole that is circumscribed by a frusto-conical seat.
  • the sphere-encircling magnetic circuit may be considered to comprise four sides.
  • the armature and the solenoid are disposed at two opposite sides.
  • the stator has a U-shape whose base passes through the solenoid and whose legs form the remaining two sides.
  • the armature is a bar of magnetically permeable material whose midpoint acts on the sphere.
  • the solenoid When the solenoid is not energized, working gaps exist between the ends of the bar and the distal ends of the stator's legs, and when the solenoid is energized, the magnetic flux attracts the bar to reduce these working gaps. As a result, the bar pushes the sphere out of concentricity with the seat to cause the hole to open and pass for injection from the injector's tip end the pressurized liquid fuel that has been supplied to the injector via the interior of the fuel rail tube.
  • the cantilever spring When the solenoid is de-energized, the cantilever spring pushes the sphere back to concentricity with the seat, and the resultant hole closure terminates the injection.
  • the fuel injector of the invention is well-suited for miniaturization to fit within a fuel rail and is an efficient and economical use of parts and materials.
  • US 4,446,837 discloses a fuel injector which is immersed in liquid fuel in a fuel bowl and comprises a spring-biased sphere that is operated to open and close a passage through a valve seat by means of an electromagnet which has a U-shaped stator and an armature bar that operates the sphere, it does not disclose a fuel injector having the features of the characterizing clause of claim 1.
  • Fig. 1 is a perspective view illustrating the general organization and arrangement of a fuel injector embodying principles of the invention.
  • Fig. 2 is a side elevational view of the fuel injector of Fig. 1 from one direction.
  • Fig. 3 is a top view of Fig. 2.
  • Fig. 4 is a left side view of Fig. 2.
  • Fig. 5 is an exploded perspective view of certain portions of a fuel rail assembly that embodies principles of the invention and contains fuel injectors like that of Figs. 1-4.
  • Fig. 6 is a transverse cross sectional view through the fuel rail assembly of Fig. 5 on a different scale and illustrates further detail, including a particular step in the process of fabricating the fuel rail assembly.
  • Fig. 7 is a view similar to Fig. 6 illustrating the condition after completion of the step being portrayed by Fig. 6.
  • Fig. 8 is an elevational view of another embodiment of fuel injector.
  • Fig. 9 is an exploded perspective view of an embodiment in which the fuel rail is integrated in an engine manifold.
  • Figs. 1-7 disclose a fuel rail assembly 18 containing several fuel injectors 20 pursuant to the present invention.
  • the fuel injectors are disposed on a carrier 22 that fits within a circular cylindrical walled tube 24, and there are four injectors for this particular example.
  • carrier 22 comprises a somewhat rectangular-shaped well 26 which has a sidewall 28 and a bottom wall 30.
  • Each injector comprises a seat member 32 that has a frustoconical seat 34 that funnels to a hole 36.
  • Seat 34 and hole 36 share a co-axis 38 which is perpendicular to bottom wall 30, and wall 30 has a suitably-shaped hole allowing seat member 32 to fit therein in the manner illustrated.
  • a sphere 40 is seated on seat 34, and all Figs. show the sphere concentric with axis 38 in closure of hole 36.
  • the sphere is resiliently urged to such concentricity by an overlying flat spring blade 42 which is cantilever-mounted atop an upright post 44 on wall 30 aside seat member 32. All Figs.
  • blade 42 to be essentially parallel with wall 30.
  • the cantilever mounting of the blade on the post is accomplished by means of a hole in the blade through which a close-fitting pin on the post passes and a head 46 on the pin which overlaps the margin of the hole in the blade to hold the corresponding end of the blade securely on the top of post 44.
  • post 44 could have a hole in its top, and the shank of a headed screw could be passed through the hole in the blade, and the screw tightened in the post hole so that the screw head holds the blade against the top of the post.
  • the Figs. show the blade to be flat and essentially parallel with wall 30, the spring exerts a pre-load force on sphere 40 when the sphere is concentric with axis 38. This pre-load can be created by suitable shaping of the blade, by setting the relative elevations of the top of post 44 and the top of the sphere in a particular way, or by a combination of both.
  • the injector has a magnetic circuit that encircles sphere 40 and is composed of a solenoid coil 48, a stator 50, and an armature 52.
  • the magnetic circuit may be considered to have a generally four-sided rectangular shape for fitting into well 26.
  • Coil 48 and armature 52 form two opposite sides while the remaining two sides, which are opposite each other, are formed by portions of stator 50.
  • Coil 48 is disposed in well 26 with its axis parallel to bottom wall 30 and spaced from axis 38.
  • Wall 30 includes a hole for cradling coil 48.
  • Stator 50 is generally U-shaped, comprising a base 54 that passes through coil 48 and parallel legs 56, 58 that extend from base 54 to form two opposite sides of the magnetic circuit.
  • Legs 56, 58 contain bends that provide for the transition from the level of coil 48 to the level of sphere 40.
  • Armature 52 is in the form of a bar that is disposed along side sphere 40 and operated by the magnetic circuit to act on the sphere at essentially the midpoint of the bar indicated by the reference numeral 60.
  • Seat member 32 contains a suitably shaped notch 61 that allows the armature to act on the sphere.
  • the opposite ends of the bar are spaced from the distal ends of legs 56, 58 by generally equal working gaps 62, 64, and the midpoint of the armature is in contact with the sphere at the end of a particular radial of the sphere.
  • the magnetic flux that is generated in the magnetic circuit operates to reduce working gaps 62, 64 by attracting armature 52 toward the ends of the stator's legs 56, 58.
  • This causes armature 52 to be moved bodily predominantly along the direction of an imaginary line that intersects axis 38 and that when viewed along axis 38 is essentially coincident with the radius of the sphere whose end is contacted by the midpoint of the armature.
  • the cooperative effect of the motion of armature 52, of the resilience of spring blade 42, and of the angle of seat 34 is such that the sphere is moved from concentricity with axis 38 to eccentricity with axis 38 with the result that hole 36 opens.
  • Sphere 40 is actually caused to roll slightly up seat 34 in the direction toward post 44.
  • the magnetic attractive force that stator 50 had been exerting on the armature ceases, and this enables the resiliency of spring blade 42 to return the sphere to concentricity with axis 38 and resulting closure of hole 36.
  • Hole 36 is surrounded by the tip end, or nozzle, 68 of the fuel injector at which fuel is injected into the engine.
  • An O-ring seal 70 is seated in a groove extending around the sidewall of the injector tip end.
  • Electric lead wires 72 from the injectors are disposed in channels 74 in carrier 22 and extend to a connector 76 at the near end of the carrier as viewed in Fig. 5.
  • the solenoid coils, stators, and seat members are secured within the carrier wells by any suitable means of securement, and a cover 78 containing suitable windows each providing an inlet for each fuel injector fits over the carrier to entrap the lead wires in the channels.
  • the cover may comprise certain means of confinement for certain of the components of the fuel injectors, such as projections 79 (Fig. 2) that serve to confine armatures 52 and to limit the extent to which the spring blades 42 can be flexed away from seat members 32.
  • the combination of the carrier, the injectors, and the cover forms a sub-assembly that is assembled into tube 24 by insertion through one end of the tube.
  • the sub-assembly has an envelope that is smaller than the main longitudinal hole 81 in tube 24.
  • the sub-assembly is inserted into the tube to align the injector tip ends 68 with corresponding circular holes 82 through the wall of the tube.
  • the sub-assembly is then displaced radially to pass.the tip ends into holes 82 so that O-rings 70 seal between the tip ends and the holes in fluid-tight manner.
  • a keeper 84 is then inserted via the same open end of the tube into the space 86 (Fig.
  • Keeper 84 is illustrated as a length of angled metal that may have a certain resiliency for resiliently fitting between the sub-assembly and the tube wall in the manner portrayed.
  • the bend of keeper 84 bears against the inside of the wall of tube 24 diametrically opposite holes 82 and the keeper's two sides extend from the bend to capture the sub-assembly in the assembled position of Fig. 7.
  • pressurized liquid fuel is introduced into tube 24 via a suitable inlet so that the fuel injectors are essentially completely immersed in fuel.
  • the fuel rail may contain a pressure regulator and also have a return outlet for return fuel when the rail is part of a recirculating fuel system. Neither an inlet fitting, a return outlet fitting, nor a pressure regulator are specifically shown in the drawing Figs., nor are the provisions that would be required for enclosing the tube ends if the inlet and/or outlet were to be located in other than such ends.
  • the particular configuration for any specific fuel rail embodying the principles of the present invention will depend on the specific engine which the fuel rail must fit.
  • connector 76 serves to connect the fuel injectors to the usual engine management computer so that the injectors are operated at the proper times and for the proper durations.
  • the energization of an injector solenoid will open the injector to cause an injection of fuel from the interior of the tube to be emitted at the injector tip end through hole 36.
  • Metering of injected fuel can be performed by a thin orifice disc (not shown) mounted on the injector tip end in covering relation to the outlet of hole 36. The injection terminates with the termination of solenoid energization.
  • Fig. 8 presents an alternate embodiment of fuel injector using the same earlier reference numerals to designate like parts. The essential difference is that the injector of Fig. 8 places the cantilever mounting of spring blade 42 on the opposite side of seat 34 from solenoid coil 48. This allows the magnetic circuit path to be shortened since the solenoid coil can be placed closer to the seat and the legs of the stator can be shorter.
  • Fig. 9 presents an alternate embodiment of fuel rail using the same earlier reference numerals to designate like parts.
  • Fig. 9 shows the tube hole 81 to be an integral part of an engine manifold 90 into which the sub-assembly composed of the carrier, the fuel injectors, and the cover is inserted.
  • the keeper 84 is also inserted into hole 81 to capture the sub-assembly in assembled position in the same manner as in Fig. 7.
  • seat member 32 does not shunt flux from the magnetic circuit, it is fabricated from non-magnetically-permeable material, such as a suitable stainless steel. It is contemplated that certain plastics may be useful for certain parts.
  • carrier 22, tube 24, and cover 78 can be made from plastics that are inert when placed in a wet fuel environment, and of course all materials that are exposed to fuel must be inert to the particular fuel composition or compositions that are used. It is contemplated that sphere 40 can itself be a suitable plastic.
  • stator 50 that may be used to advantage in fabricating the fuel injector's magnetic circuit.
  • the stator is constructed from two separate pieces, each of which comprises the entirety of one of the stator's legs and a fraction of its base.
  • One piece contains a threaded hole in the end of its base portion and the other piece contains a threaded shank in the end of its base portion. The two pieces are joined by screwing the threaded shank into the threaded hole after the respective base portions have been inserted into the solenoid coil.
  • the magnetic circuit is preferably constructed such that the working gaps do not close to an extent that allows full surface-to-surface contact of the armature with the ends of the stator legs. This can be accomplished by designing seat member 32, sphere 40, and the magnet circuit such that when the sphere is displaced from concentricity with axis 38, its travel will be arrested by abutment with an axial wall 92 (Fig. 8) of seat member 32 before the working gaps have fully closed. Axial wall 32 extends away from seat 34 parallel to axis 38. It is also possible to place a non-magnetic coating over the ends of the stator and the armature.
  • an equivalent armature could comprise a pivotal mounting at one end so that the armature travel is executed over a small arc. This will still result in essentially the same action on the sphere, i.e. motion that is directed essentially toward axis along the radial of the sphere that is contacted by the middle of the armature.

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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)
  • Fuel-Injection Apparatus (AREA)

Abstract

Une série d'injecteurs (20) de carburant est montée sur un support (22) de forme allongée introduit par le bout à l'intérieur d'un corps creux (24) oblong tel qu'une tubulure ou un collecteur d'admission de moteur. Des câbles de branchement (72) relient les injecteurs (20), le long du support (22), à une prise (76) sur l'extérieur. Les buses (68) des injecteurs de carburant sont scellées dans des cavités (82) traversant la paroi dudit corps creux (24). Un dispositif de fixation (84) introduit lui aussi par le bout dans le corps creux (24), maintient le support en place. Chaque injecteur (20) comporte une sphère (40) obturant, sous l'effet d'une lame de ressort plate (42), l'orifice (30) dont l'entrée est commandée par le siège tronconique sur lequel repose la bille. Le ressort à lame (42) est monté en cantilever sur un tenon (44) adjacent au siège (34). Le circuit magnétique (48) autour de la sphère (40) comprend une armature (52) agissant contre le côté de la sphère (40) en déplaçant celle-ci de manière excentrique par rapport au siège (34) de manière à libérer l'orifice de sortie (36). Le corps creux contient du carburant liquide sous pression, de sorte que l'injecteur se trouve immergé dans ce liquide, lequel va être injecté par la buse (68) au moment où la sphère, déplacée de son siège (34), libère le passage.

Claims (13)

  1. Injecteur de carburant (20) actionné par un moyen (48) d'actionnement électrique et comprenant une structure de corps ayant un orifice d'entrée de carburant, un orifice de sortie de carburant, et un siège tronconique (34) qui circonscrit un orifice (36) et est disposé entre l'orifice d'entrée de carburant et l'orifice de sortie de carburant, une sphère (40) qui est disposée pour coopérer avec le siège et est actionnée par le moyen d'actionnement électrique pour ouvrir et fermer sélectivement ledit orifice à l'écoulement d'un carburant entre l'orifice d'entrée de carburant et l'orifice de sortie de carburant, un moyen élastique (42) agissant pour repousser élastiquement la sphère le long d'un axe imaginaire autour duquel le siège tronconique forme une surface de révolution vers un appui concentrique sur le siège et pour ainsi fermer l'orifice, et une barre mobile (52) qui est actionnée par le moyen d'actionnement électrique, caractérisé en ce que la barre mobile (52) est disposée le long de la sphère (40) et est actionnée par le moyen (48) d'actionnement électrique pour exécuter un mouvement s'effectuant de façon prédominante dans la direction d'une ligne imaginaire qui coupe l'axe, la barre effectuant ce mouvement vers et en provenance de l'axe en fonction d'un signal de commande électrique appliqué au moyen d'actionnement électrique, le mouvement de la barre vers l'axe créant une force agissant sur la sphère à l'extrémité d'un rayon de la sphère, ce rayon, lorsqu'il est vu le long de l'axe, coïncidant sensiblement avec la ligne imaginaire, et cette force créée par ce mouvement de la barre le long de la ligne imaginaire ayant pour effet, en coopération avec le siège et le moyen élastique, de provoquer le déplacement en son entier de la sphère d'une position concentrique à l'axe à une position excentrée par rapport à l'axe afin d'ouvrir l'orifice à un écoulement, et cet écartement de la barre par rapport à l'axe ayant pour effet de permettre au moyen élastique, en coopération avec le siège, de provoquer le déplacement en son entier de la sphère de la position excentrée par rapport à l'axe à la position concentrique à l'axe afin de fermer ainsi l'orifice à un écoulement.
  2. Injecteur de carburant selon la revendication 1, caractérisé en outre en ce que la barre est un élément libre qui est piégé dans un espace confiné dans l'injecteur de carburant.
  3. Injecteur de carburant selon la revendication 1, caractérisé en outre en ce que ledit injecteur de carburant comprend un circuit magnétique qui couple fonctionnellement le moyen d'actionnement électrique à la barre, le circuit magnétique comportant un stator (50) à travers lequel un flux magnétique est conduit vers la barre, la barre comprenant un matériau magnétiquement perméable, et un moyen à entrefer de travail (62, 64) entre le stator et la barre, à travers lequel est conduit le flux magnétique.
  4. Injecteur de carburant selon la revendication 3, caractérisé en outre en ce que le moyen à entrefer de travail comprend deux entrefers de travail (62, 64) à des extrémités opposées de la barre.
  5. Injecteur de carburant selon la revendication 4, caractérisé en outre en ce qu'un moyen de butée (92) est disposé de façon à servir de butée à la sphère pour limiter le degré de déplacement excentrée de la sphère par rapport à l'axe et pour empêcher la fermeture complète des entrefers de travail lorsque la sphère bute sur le moyen de butée.
  6. Injecteur de carburant selon la revendication 1, caractérisé en outre en ce que ledit moyen élastique comprend une lame élastique (42) qui porte élastiquement sur la sphère et qui est montée en porte-à-faux sur la structure de corps au voisinage de la sphère.
  7. Injecteur de carburant selon la revendication 6, caractérisé en outre en ce que la structure de corps comprend un montant (44) adjacent au siège, et en ce que la lame est montée en porte-à-faux sur le montant.
  8. Injecteur de carburant selon la revendication 7, caractérisé en outre en ce que le moyen d'actionnement électrique comprend un solénoïde (48), et en ce que le solénoïde (48) et le montant (44) sont disposés sur le même côté opposé du siège.
  9. Injecteur de carburant selon la revendication 7, caractérisé en outre en ce que le moyen d'actionnement comprend un solénoïde (48) et en ce que le solénoïde (48) et le montant (44) sont disposés sur des côtés opposés du siège.
  10. Injecteur de carburant selon la revendication 1, caractérisé en outre en ce que le moyen d'actionnement électrique est fonctionnellement couplé à la sphère par un circuit magnétique (50, 52, 62, 64) agencé de façon à entourer la sphère, et en ce que le circuit magnétique comprend un stator (50) qui conduit un flux magnétique vers la barre (52) pour actionner électromagnétiquement la barre.
  11. Injecteur de carburant selon la revendication 10, caractérisé en outre en ce que le circuit magnétique est essentiellement à quatre côtés, la barre (52) formant un côté, et le stator comprend une base (54) et deux pattes (56, 58) qui forment les trois côtés restants, la base du stator passant à travers un solénoïde (48) qui crée le flux magnétique.
  12. Injecteur de carburant selon la revendication 11, caractérisé en outre en ce que le stator comprend deux parties assemblées l'une à l'autre, une partie du stator comprenant la totalité de l'une des pattes et une portion de la base et l'autre partie du stator comprenant la totalité de l'autre des pattes et une autre portion de la base.
  13. Injecteur de carburant selon la revendication 1, caractérisé en outre en ce que la barre agit sur la sphère par contact direct avec la sphère.
EP92903597A 1991-02-11 1992-02-05 Injecteur de carburant à bille Expired - Lifetime EP0571413B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US65359891A 1991-02-11 1991-02-11
US653598 1991-02-11
PCT/EP1992/000253 WO1992014047A1 (fr) 1991-02-11 1992-02-05 Rampe d'alimentation munie d'injecteurs de carburant a bille

Publications (2)

Publication Number Publication Date
EP0571413A1 EP0571413A1 (fr) 1993-12-01
EP0571413B1 true EP0571413B1 (fr) 1994-11-23

Family

ID=24621544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92903597A Expired - Lifetime EP0571413B1 (fr) 1991-02-11 1992-02-05 Injecteur de carburant à bille

Country Status (4)

Country Link
EP (1) EP0571413B1 (fr)
JP (1) JPH06505073A (fr)
DE (1) DE69200710T2 (fr)
WO (1) WO1992014047A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573510B (zh) * 2012-07-30 2015-12-30 广西玉柴机器股份有限公司 电控喷油器固定压板

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4446837A (en) * 1977-03-25 1984-05-08 The Bendix Corporation Pressure regulator-accumulator for use with mechanical diaphragm pump
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system
US5030116A (en) * 1989-09-04 1991-07-09 Sumitomo Wiring System, Ltd. Connector block for injectors for internal combustion engine and junction terminal for use with the same connector block

Also Published As

Publication number Publication date
EP0571413A1 (fr) 1993-12-01
JPH06505073A (ja) 1994-06-09
DE69200710T2 (de) 1995-05-18
WO1992014047A1 (fr) 1992-08-20
DE69200710D1 (de) 1995-01-05

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