EP1718862B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP1718862B1
EP1718862B1 EP05706519A EP05706519A EP1718862B1 EP 1718862 B1 EP1718862 B1 EP 1718862B1 EP 05706519 A EP05706519 A EP 05706519A EP 05706519 A EP05706519 A EP 05706519A EP 1718862 B1 EP1718862 B1 EP 1718862B1
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EP
European Patent Office
Prior art keywords
control
injection valve
fuel injection
housing
valve according
Prior art date
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Application number
EP05706519A
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German (de)
English (en)
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EP1718862A1 (fr
Inventor
Marco Ganser
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Ganser Hydromag AG
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Ganser Hydromag AG
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Publication of EP1718862A1 publication Critical patent/EP1718862A1/fr
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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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing

Definitions

  • the present invention relates to a fuel injection valve for intermittent fuel injection into the combustion chamber of an internal combustion engine according to the preamble of claim 1 such as in US 5 685 483 A disclosed.
  • An injector for fuel injection in which an annular gap is formed between an injector body and a throttle module inserted therein and designed as a separate component.
  • plastically deformable cutting edges are provided on the throttle module, which are pressed during the assembly of the throttle module to stages in the injector.
  • a control chamber is limited on the one hand by a spring plate, which is loose, that is not sealing, arranged in a bore of a nozzle body.
  • This spring plate is pressed by the pressure prevailing in the high pressure chamber of the valve and the force of a spring against a counter body.
  • the present invention is based on the object to provide a fuel injection valve of the type mentioned, in which the manufacture and installation of the control body in the housing in comparison to the known fuel injection valves is simpler and therefore less expensive.
  • control body is no longer pressed as in the prior art in the housing, but loose and not sealingly inserted into the opening in the housing. This allows easy installation and removal of the control body. Furthermore, the control body can be produced more cost-effectively, since the dimensional accuracy and the machining quality do not have to be so demanding.
  • the sealing of the high-pressure chamber with respect to the low-pressure chamber is ensured on the one hand by the interaction of sealing surfaces on the control body and on the holding body and on the other hand by the concern of a further sealing surface on the holding body on a seat formed on the housing.
  • fuel injector 1 has a housing 2, which is formed by an upper housing part 2a and a valve seat member 2b.
  • the valve seat element 2b is tightly connected to the upper housing part 2a by means of a holding element 3 designed as a clamping nut.
  • the valve seat element 2b has a valve seat 4 and injection openings 5.
  • a central, coaxial to the longitudinal axis A of the housing 2 bore 6 is formed over its length changing diameter, which defines a high-pressure chamber 7.
  • This high-pressure chamber 7 communicates with a high-pressure fuel inlet 8 and extends to the valve seat 4.
  • the housing longitudinal axis A coaxial injection valve member 9 is arranged, which in the in the FIG. 1 shown closed position with its tip with the valve seat 4 cooperates to close the injection openings 5.
  • the injection valve member 9 by means of a hydraulic control device 10, whose construction on hand Figures 2 and 3 will be explained in more detail, lifted off the valve seat 4.
  • the injection valve member 9 is guided by means of a narrow slide fit in the valve seat element 2b with a section designed as a guide 9a.
  • the injection valve member 9 is provided with grinding surfaces in the region of this guide 9a.
  • the injection valve member 9 is pressed by means of a closing spring 11 in the closing direction down.
  • the closing spring 11 is supported at its lower end on a support ring 12 which rests on a shoulder 13 on the injection valve member 9. At the other end, the closing spring 11 is supported on a spacer sleeve 14 surrounding the injection valve member 9.
  • the relatively long, hollow cylindrical spacer sleeve 14 spans the region of the confluence of the fuel high pressure inlet 8 in the central bore 6 and is guided at their ends by means of guide surfaces 15, 16 on the wall of the bore 6 ( Fig. 2 ).
  • the clearance between the guide surface 15, 16 and the wall of the bore 6 is between 1/100 and 1/10 mm.
  • the spacer sleeve 14 has a smaller diameter, so that between the wall of the bore 6 and the outer periphery of the spacer sleeve, an annular space 17 is formed, which with the Fuel high pressure inlet 8 is in communication.
  • the spacer sleeve 14 is provided with passage openings 18, can pass through the fuel from the annular space 17 into the interior of the spacer sleeve 14.
  • a stop shoulder 19 is formed which serves as a stop for the spacer sleeve 14 with a displacement of the same upward and cooperate with a formed at the lower end of the spacer sleeve 14 stop surface 20 is determined ( Fig. 2 ).
  • the spacer sleeve 14 presses against a hollow cylindrical guide sleeve 21 belonging to the hydraulic control device 10, which is guided at the upper end by means of a guide surface 22 in the central bore 6.
  • annular space 23 is present, which is connected via passages 24, which are provided at the lower end of the guide sleeve 21 or at the upper end of the spacer sleeve 14, with the interior of the spacer sleeve 14 and the high-pressure chamber. 7 belongs.
  • the injection valve member 9 has a double-acting control piston 25, which is guided in the guide sleeve 21 in a close sliding fit.
  • the control piston 25 is acted upon on its underside by the high fuel pressure in the high-pressure chamber 7 and limited with its upper side a control chamber 26 which is bounded laterally by the guide sleeve 21.
  • an intermediate valve body 27 which in the direction the longitudinal axis A is displaceable and has a lower end face 27a.
  • the intermediate valve body 27 is guided in the guide sleeve 21 with a play of typically 0.03 to 0.2 millimeters.
  • In the intermediate valve body 27 extends a coaxial to the longitudinal axis A throttle passage 31, which extends between the lower and upper end face 27 a, 27 b of the intermediate valve body 27.
  • a spring element 28 is arranged, which is supported on the one hand on the intermediate valve body 27 and on the other hand on a support member 29 which rests on an annular shoulder 30 on the guide sleeve 21 ( Fig. 3 ).
  • the spring element 28 surrounds a central projection 25a of the control piston 25 and generates on the intermediate valve body 27 a force which is substantially smaller than the force exerted by the closing spring 11 force.
  • the lower end face 27a of the intermediate valve body 27 is arranged at a distance a from the upper side 29a of the support element 29 (see FIG FIG. 3 ).
  • the support member 29 serves as the movement of the intermediate valve body 27 downwardly limiting stop.
  • the support element 29 could also be integral with the guide sleeve 21 and formed with the latter as a workpiece.
  • the upper end face 27b of the intermediate valve body 27 is located on a lower, serving as a sealing surface end face 32a of a control body 32 which is loosely, that is not arranged in the central bore 6.
  • the lower end 32a of the control body 32 seals together with the top 21a of the guide sleeve 21 from the control chamber 26 with respect to the high-pressure chamber 7 from.
  • the control body 32 is located at a upper end face 32b on the underside 33a of a holding body 33 at.
  • the holding body 33 is screwed by means of an external thread 34 into a recess 35 in the housing 2.
  • the holding body 33 is provided with countersunk holes 36, which serve to insert a tool for screwing and tightening the holding body 33 (see also FIG. 4 ).
  • the holding body 33 is screwed so tightly into the housing recess 35 that it rests with a formed on its underside 33 a, first annular sealing surface 37 on a seat 38 which is formed at the bottom of the recess 35 in the housing 2 and the central bore 6 surrounds.
  • first sealing surface 37 of the holding body 33 includes a second, also annular sealing surface 39, which lies in the same plane as the first sealing surface 37.
  • second sealing surface 39 is formed on the upper end face 32b of the control body 32 sealing surface 40 at.
  • the sealing surfaces 37, 38, 39 and 40 preferably close close to the circumference of the bore 6.
  • the sealing surfaces 37 and 39 of the holding body 33 are advantageously formed on a single planar end face of the holding body 33.
  • the control body 32 has a coaxial with the longitudinal direction A extending, continuous control passage 41 which has a throttle restriction 42 at its opening into the upper end face 32b of the control body 32 end.
  • the control passage 41 is in hydraulic communication with the throttle passage 31 in the inter-valve body 27.
  • the sealing surface 40 on the upper end face 32b of the control body 32 surrounds the control passage 41.
  • passages 43 are further formed, which are offset laterally relative to the control passage 41 and which open into the lower end face 32a of the control body 32.
  • the passages 43 are connected to an annular groove 44 on the outer circumference of the control body 32 in connection, which is connected to the annular space 23 and in which therefore the high fuel pressure prevails.
  • an electromagnetically actuated pilot valve 45 is housed in the housing 2, which has a displaceable valve stem 46 and a separate therefrom closure body 47 which rests between the injections on serving as a valve seat surface upper end face 32b of the control body 32 and the Closes control passage 41.
  • a pilot valve spring 48 On the valve stem 46 and thus also on the closure body 47 acts a pilot valve spring 48, which presses the closure body 47 to the upper end face 32b of the control body 32.
  • an electromagnet arrangement 49 is present, which consists of a magnetic body 50 with a magnetic coil 51 and a magnet armature 52.
  • the valve stem 46 is fixedly connected to the armature 52 and is slidably guided in the magnet body 50.
  • the holding body 33 has in addition to the countersunk holes 36 and a central bore 53 (see also FIG. 4 ), in the valve stem 46 extends and in which the closure body 47 is guided displaceably.
  • this central bore 53 projects into a stop shoulder 54, which engages in an annular groove 55 on the valve stem 46.
  • the maximum stop stroke b of the valve stem 46 is smaller than the distance c between the armature 52 and the magnet body 50, so that even when the open pilot valve 45 of Magnetic armature 52 is not applied to the magnetic body 50.
  • the stop shoulder 54 for the valve stem 46 is outside the effective magnetic field of the solenoid assembly 49th
  • valve stem 46 In order to use the valve stem 46 in the holding body 33, the latter is provided with an eccentrically arranged recess 56 which is open to the central bore 53.
  • the valve stem 46 is laterally offset relative to the axis of the central bore 53 inserted into the recess 56. If the annular groove 55 of the valve stem 46 is at the level of the stop shoulder 54, the valve stem 46 is displaced transversely into the central bore 53.
  • the closure body 47 guided loosely in the bore 53 serves, in addition to closing the control passage 41, to precisely set the stroke b of the valve stem 46.
  • the closure body 47 By inserting a closure body 47 of a certain height, the size of the stroke b can be set precisely. If such an accurate adjustment should not be necessary - which may be the case, for example, in another embodiment of the stroke limitation of the valve stem 46 - the closure body 47 can be dispensed with.
  • the control passage 41 is directly through the valve stem 46 is closed, as for example from the EP-A-1 273 791 is known.
  • the lower, crowned end 46a of the valve stem 46 acts on the flat upper end face 47b of the closure body 47 (FIG. Fig. 3 ).
  • the upper end surface 47b of the closure body 47 could be crowned and cooperate with a flat end surface 46a of the valve stem 46. In both cases, the tightness of the pilot valve 45 is improved.
  • the central bore 53 and the recess 56 in the holding body 33 belong to a low-pressure chamber 57 which is connected to a low-pressure outlet 58 (FIG. Fig. 1 and 2 ) is fluidly connected. From this low pressure outlet 58, a line, not shown, leads back to a fuel reservoir.
  • the closure body 47 is provided with longitudinal grooves 47a which allow a fuel flow from the control passage 41 into the low-pressure space 57 when the closure body 47 is lifted off the control body 32.
  • the annular groove 44 in the control body 32 of the high fuel pressure which may be 2000 bar and more.
  • the first sealing surface 37 of the holding body 33 screwed into the housing 2 is sealingly connected to the annular groove 44 belonging to the high pressure chamber 7
  • Seat 38 pressed in the housing 2.
  • the control body 32 is pressed by the fuel pressure in the high pressure chamber 7 with its sealing surface 40 against the other sealing surface 39 on the holding body 33. At the surface quality of the sealing surfaces 37, 39 and 40 and the seat 38 are not made too high demands.
  • the functioning of the in the Figures 1 - 3 The fuel injection valve 1 shown is as follows: Starting from the state shown in these figures, in which the injection valve member 9 is in the closed position and the intermediate valve body 27 sealingly abuts the control body 32. The solenoid assembly 49 is not energized and the closure body 47 closes the control passage 41. In the control chamber 26, the same pressure prevails as in the high pressure chamber. 7
  • an injection cycle is triggered.
  • the magnetic armature 52 is pulled against the magnetic body 50, with the result that the valve stem 46 lifts off from the closure body 47.
  • the closure body 47 can now move upwards under the effect of the fuel pressure in the control passage 41 and releases the control passage 41.
  • the control passage 41 and thus also the control chamber 26 are now connected to the low-pressure chamber 57.
  • the pressure in the control chamber 26 begins to decrease.
  • the injection valve member 9 moves away from the valve seat 4 and releases the injection openings 5.
  • the injection process begins. In this case, fuel from the control chamber 26 through the Throttling passage 31 and the control passage 41 displaced in the low-pressure space 57.
  • the solenoid assembly 49 is de-energized. This has the consequence that under the force of the pilot valve spring 48 of the valve stem 46 and with it the closure body 47 are moved downward until the closure body 47 comes to rest on the control body 32.
  • the low-pressure side opening of the control passage 41 is closed by the closure body 47 again.
  • the pressure in the control passage 41 starts to increase. This, together with the fact that in the passages 43 in the control body 32 of the high fuel pressure, leads to a Wegbesselssel the intermediate valve body 27 away from the sealing contact with the control body 32.
  • the downward movement of the intermediate valve body 27 is terminated by abutting the top 29 a of the support member 29 , Characterized in that by moving away the intermediate valve body 27 from the control body 32, the passages 43 are opened in the control body 32 can flow through these passages 43 and the throttle passage 31 and along the entire circumference of the intermediate valve body 27 fuel under high pressure, resulting in the closing of the injection valve member. 9 strongly accelerated. As soon as the injection valve member 9 abuts the valve seat 4 again and closes the injection openings 5, the injection process is ended.
  • the spacer sleeve 14 transmits the force of the closing spring 11 via the guide sleeve 21 on the control body 32nd
  • the injection valve member 9 is inserted with the closing spring 11 and slipped spacer sleeve 14 in the valve seat member 2b, this sub-assembly is inserted into the upper housing part 2a and secured by means of the holding element 3 on the upper housing part 2a.
  • the stop shoulder 19 in the upper housing part 2 a limits the insertion path of the spacer sleeve 14 in the central bore 6, which greatly simplifies the assembly of the control body 32.
  • the support member 29 serves as mentioned as a stop for the intermediate valve body 27, whereby the Oe Albanysweg the intermediate valve body 27 is limited. This brings advantages in pre-injections with short time intervals.
  • control body 32 is loosely inserted into the central bore 6, no special requirements must be made of the control body 32 in terms of production and processing. In addition, the installation of the Control body 32 in the housing 2 comparatively simple. All this has a favorable effect on the costs.
  • the described special constructive solutions can also be used in fuel injection valves, in which the fuel supply to the valve seat via a relative to the housing longitudinal axis A laterally offset feed channel, as for example from US-A-5,775,301 is known.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (17)

  1. Soupape d'injection de carburant pour l'injection intermittente de carburant dans la chambre de combustion d'un moteur à combustion interne, avec un boîtier allongé (2), un siège de soupape (4) avec des orifices d'injection (5), une chambre haute pression (7) dans le boîtier (2), qui est en communication avec une entrée haute pression de carburant (8) et avec le siège de soupape (4), un organe de soupape d'injection (9) guidé de façon déplaçable longitudinalement dans le boîtier (2), qui coopère avec le siège de soupape (4) pour fermer et libérer les orifices d'injection (5), et un dispositif de commande hydraulique (10) pour commander le mouvement de déplacement de l'organe de soupape d'injection (9), qui comprend un corps de commande (32) maintenu par sa périphérie dans une ouverture (6) dans le boîtier (2) raccordée à la chambre haute pression (7) et pourvu d'un passage de commande (41), qui est en communication avec une chambre de commande (26) sur une première face frontale (32a) du corps de commande (32) et qui, sur la deuxième face frontale (32b) du corps de commande (32), est fermé et peut être raccordé à une chambre basse pression (57) au moyen d'une soupape pilote (45), caractérisée en ce que le corps de commande (32) est maintenu à sa périphérie d'une façon non étanche dans l'ouverture (6) du boîtier (2) et présente sur sa deuxième face frontale (32b) une face d'étanchéité plane (40) entourant le passage de commande (41), avec laquelle le corps de commande (32) s'applique de façon étanche, sous l'action de la pression de carburant dans la chambre haute pression (7), sur une première face d'étanchéité (39) d'un corps de maintien (33) maintenu fermement dans le boîtier (2), sur lequel est formée une deuxième face d'étanchéité (37) qui est située dans une face d'extrémité plane commune avec la première face d'étanchéité (39) sur le corps de maintien (33) et avec laquelle le corps de maintien (33) s'applique de façon étanche sur une face de siège (38) formée dans le boîtier (2), laquelle entoure l'ouverture (6) dans le boîtier (2).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que le dispositif de commande hydraulique (10) comprend un piston de commande (25) en liaison active avec l'organe de soupape d'injection (9) et guidé de façon déplaçable longitudinalement, qui est soumis d'une part à la pression du réseau de carburant régnant dans la chambre haute pression (7) et d'autre part à la pression de commande de carburant dans la chambre de commande (26).
  3. Soupape d'injection de carburant selon la revendication 1 ou 2, caractérisée en ce qu'un corps de soupape intermédiaire coulissant (27) est disposé dans l'ouverture (6) dans le boîtier (2), lequel, dans l'état fermé de la soupape d'injection de carburant (1), s'applique sur la première face frontale (32a) du corps de commande (32) et ferme en l'occurrence au moins un passage (43), formé dans le corps de commande (32), qui débouche d'une part dans la première face frontale (32a) du corps de commande (32) et qui est d'autre part en communication d'écoulement avec la chambre haute pression (7).
  4. Soupape d'injection de carburant selon la revendication 3, caractérisée en ce qu'il est prévu dans le boîtier (2) une butée (29a) destinée à limiter le mouvement de déplacement du corps de soupape intermédiaire (27).
  5. Soupape d'injection de carburant selon la revendication 3, caractérisée en ce que le corps de soupape intermédiaire (27) est guidé avec du jeu dans une douille de guidage (21) disposée dans l'ouverture (6) dans le boîtier (2), laquelle est appliquée sur la première face frontale (32a) du corps de commande (32).
  6. Soupape d'injection de carburant selon les revendications 4 et 5, caractérisée en ce que la butée (29a) est formée sur la douille de guidage (21).
  7. Soupape d'injection de carburant selon les revendications 4 et 5, caractérisée en ce que la butée (29a) est formée sur un élément de soutien (29) supporté dans la douille de guidage (21), qui sert d'appui pour un élément de ressort (28) poussant le corps de soupape intermédiaire (27) contre le corps de commande (32).
  8. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 7, caractérisée par une douille d'écartement (14) entourant l'organe de soupape d'injection (9) et disposée dans l'alésage (6) dans le boîtier (2), sur laquelle s'appuie, par sa première extrémité, un ressort de fermeture (11) qui prend appui par son autre extrémité sur l'organe de soupape d'injection (9).
  9. Soupape d'injection de carburant selon les revendications 5 et 8, caractérisée en ce que la douille d'écartement (14) s'applique sur la douille de guidage (21) sur l'extrémité de celle-ci située à l'opposé du corps de commande (32).
  10. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la soupape pilote (45) présente une tige de soupape (46) s'étendant dans le corps de maintien (33), qui peut être déplacée dans la direction opposée au passage de commande (41) contre la force d'un ressort de soupape pilote (48) lors de l'excitation d'un agencement d'électroaimant (49) pour l'ouverture du passage de commande (41), la course d'ouverture (b) de la tige de soupape (46) étant limitée par une butée (54) formée dans le corps de maintien (33).
  11. Soupape d'injection de carburant selon la revendication 10, caractérisée en ce que la tige de soupape (46) est reliée à un induit magnétique (52) coopérant avec une bobine magnétique (51), et en ce que la butée (54) est disposée sur le côté de l'induit magnétique (52) situé à l'opposé de la bobine magnétique (51).
  12. Soupape d'injection de carburant selon la revendication 10 ou 11, caractérisée en ce que la butée est formée sur le corps de maintien (33).
  13. Soupape d'injection de carburant selon la revendication 12, caractérisée en ce que la butée est formée par un épaulement de butée (54) façonné sur le corps de maintien (33), qui s'engage avec un jeu axial dans une rainure (55) de la tige de soupape (46).
  14. Soupape d'injection de carburant selon l'une quelconque des revendications 10 à 13, caractérisée en ce qu'entre la tige de soupape (46) et le corps de commande (32) un corps de fermeture (47) guidé librement dans le corps de maintien (33) est disposé, qui est poussé par l'intermédiaire de la tige de soupape (46) sur la deuxième face frontale (32b) du corps de commande (32) lorsque l'agencement d'électroaimant (49) n'est pas excité et qui ferme en l'occurrence le passage de commande (41).
  15. Soupape d'injection de carburant selon la revendication 14, caractérisée en ce que le corps de fermeture (47) et l'extrémité (46a) de la tige de soupape (46) qui coopère avec celui-ci sont disposés en position coaxiale par rapport à l'axe longitudinal (A) du boîtier (2).
  16. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 15, caractérisée en ce que le corps de maintien (33) est vissé dans un évidement (35) dans le boîtier (2).
  17. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 16, caractérisée en ce qu'au moins un passage (43) est formé dans le corps de commande (32), lequel débouche d'une part dans la première face frontale (32a) du corps de commande (32) et est en communication d'autre part avec un évidement (44) formé à la périphérie extérieure du corps de commande (32), qui est à son tour en communication d'écoulement avec la chambre haute pression (7).
EP05706519A 2004-02-25 2005-02-21 Soupape d'injection de carburant pour moteurs a combustion interne Active EP1718862B1 (fr)

Applications Claiming Priority (2)

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CH3102004 2004-02-25
PCT/CH2005/000098 WO2005080785A1 (fr) 2004-02-25 2005-02-21 Soupape d'injection de carburant pour moteurs a combustion interne

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EP1718862A1 EP1718862A1 (fr) 2006-11-08
EP1718862B1 true EP1718862B1 (fr) 2010-11-03

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US (1) US7591436B2 (fr)
EP (1) EP1718862B1 (fr)
AT (1) ATE487057T1 (fr)
DE (1) DE502005010478D1 (fr)
ES (1) ES2355146T3 (fr)
WO (1) WO2005080785A1 (fr)

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Also Published As

Publication number Publication date
WO2005080785A1 (fr) 2005-09-01
ES2355146T3 (es) 2011-03-23
DE502005010478D1 (de) 2010-12-16
ATE487057T1 (de) 2010-11-15
EP1718862A1 (fr) 2006-11-08
US20060278731A1 (en) 2006-12-14
US7591436B2 (en) 2009-09-22

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