EP1527272B1 - Injecteur de carburant comprenant une zone de raccordement resistant a haute pression - Google Patents

Injecteur de carburant comprenant une zone de raccordement resistant a haute pression Download PDF

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Publication number
EP1527272B1
EP1527272B1 EP03724837A EP03724837A EP1527272B1 EP 1527272 B1 EP1527272 B1 EP 1527272B1 EP 03724837 A EP03724837 A EP 03724837A EP 03724837 A EP03724837 A EP 03724837A EP 1527272 B1 EP1527272 B1 EP 1527272B1
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EP
European Patent Office
Prior art keywords
bore
injector body
fuel injector
region
fuel
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
EP03724837A
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German (de)
English (en)
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EP1527272A1 (fr
Inventor
Siegfried Ruthardt
Juergen Hanneke
Eike Kobes
Kasim-Melih Hamutcu
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1527272A1 publication Critical patent/EP1527272A1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations

Definitions

  • fuel injectors are used, which are supplied via a high-pressure accumulator (common rail).
  • Fuel injection systems with high-pressure storage space advantageously allow the injection and its course to be adapted to the load and speed of the self-igniting internal combustion engine.
  • high pressure resistance of the injector body of the fuel injectors used to safely control the high operating pressures occurring.
  • subsequent generations of fuel injectors is expected that the injector body will be exposed to a further increasing operating pressure.
  • DE 196 50 865 A1 refers to a fuel injector which is actuated by means of a solenoid valve.
  • the fuel injector according to this solution comprises a laterally opening into the injector high-pressure port through which a longitudinally extending in the injector body pressure bore is supplied from the high-pressure reservoir with high-pressure fuel. Via the pressure bore extending in the injector body, the fuel quantity to be injected is supplied to the injection openings, which quantity of fuel is injected into the combustion chamber of the self-igniting internal combustion engine. From the laterally arranged on the injector body connection area extends an inlet bore, which in addition to the already mentioned, extending in the longitudinal direction through the injector pressure bore an annular space supplied with high pressure fuel, which encloses a valve piece.
  • an inlet throttle is formed, for which supplied to a limited by the valve piece and the injection valve member control chamber under high pressure fuel as the control volume becomes.
  • the obliquely extending through the injector inlet bore for the annulus opens at an entrance angle into the annulus and forms with the wall surface of the annulus a blending area, which is a potential weak point in terms of compressive strength of the injector of DE 196 50 865 A1 represents known fuel injector.
  • EP 0 916 842 A1 also relates to a fuel injector for supplying fuel into the combustion chambers of a self-igniting internal combustion engine.
  • a high-pressure connection is received, via which a nozzle bore supplying a pressure bore with high-pressure fuel and an annular space surrounding a valve piece is supplied with high-pressure fuel.
  • this solution branches at the end face of the bore which receives the high pressure port, a first bore to the annulus at a first angle with respect to the axis of symmetry of the fuel injector and a second bore at a second angle, based on the axis of symmetry of the fuel injector.
  • the Injektorlcörper the fuel injector according to EP 0 916 842 A1 be kept relatively slim, but results in the front side of the high pressure port, a blending area, since there two holes open directly adjacent to each other, which is a weak point in terms of strength to be achieved; Furthermore, there is an intersection region in the region of the mouth, which acts on the annular space with high-pressure fuel for supplying the control chamber via an inlet throttle element, which is a weak point of this Injelctors in terms of the amount of pressurization.
  • a high-pressure fuel accumulator for a fuel injection system for internal combustion engines is supplied with fuel from a high-pressure fuel pump.
  • the high-pressure fuel accumulator comprises an elongate tubular body of jet, which is provided with connections for the fuel supply and the fuel discharge.
  • the connections for the Kraftstoffzufulir and the fuel discharge are designed as connecting pieces, from each of which a connecting hole opens eccentrically to the axis of the tubular body in this.
  • DE 199 37 946 C1 also relates to a high-pressure fuel accumulator for a fuel injection system for internal combustion engines.
  • a plurality of connecting pieces are provided at the high-pressure fuel storage, wherein a plurality of connecting bores between the cavity of the high-pressure fuel accumulator and each run a connecting piece.
  • the connecting holes open tangentially in the Cavity of the high-pressure fuel storage, wherein the tangentially opening into the cavity of the high-pressure fuel storage connecting holes have a larger diameter than non-tangentially opening into the storage space connecting holes.
  • the compressive strength of the injector body of a fuel injector can be significantly increased, without additional sealing elements are required. This is achieved by reducing the angle between the nozzle supply bore extending in the injector body and its inflow section. This measure results in a reduction in stress in the transition region (knee region) from the inlet bore section into the nozzle supply bore within the injector body.
  • the inlet bore section which is executed at an optimized knee angle in the lateral pressure pipe socket, can be sealed by the screwed into the pressure pipe socket high-pressure connection.
  • the knee angle in the transition region approaches a perpendicular orientation, i. the ideal case of a cross-free knee area. Due to the reduction of the knee angle between inlet bore portion and the nozzle supply bore results in a steeper position between the running through the pressure pipe nozzle inlet bore portion and the nozzle supply bore. This leads to a reduction in the comparison stress in the transition region (knee region) between these holes.
  • the compressive strength of the injector can be further increased by the fact that the transition region between the inlet bore portion and the nozzle supply hole as far as possible - but keeping a minimum distance to the peripheral surface of the injector body - is formed by the valve chamber.
  • the risk of breakage of the injector body when applying an increased operating pressure levels can be further reduced by the fact that the injector body as far as possible in the amount of its high-pressure connection undergoes no material removal.
  • FIG. 1 the high-pressure connection region can be seen on an injector body with a bore pattern according to the prior art.
  • a fuel injector 1 comprises an injector body 2, which has a central bore 3 in its lower region.
  • a mounting space 4 is formed, in which a in FIG. 1 Solenoid valve assembly, not shown, is inserted, which actuates a valve member, the in FIG. 1 also not shown for reasons of clarity.
  • a connecting piece 6 is laterally formed, which has a connection region 5, in which a connecting line of a in connection with FIG. 1 not shown high-pressure accumulator (common rail) can be recorded.
  • the connection region 5 is preferably formed as a connection thread.
  • an end face 7 is provided in the nozzle 6, which is laterally formed on the injector body 2, an end face 7 is provided.
  • the end face 7 terminates with a chamfer 8 and is acted upon by the high pressure connection in the injector body 2 promoted, under very high pressure fuel.
  • the inlet bore section 9.1 merges into a bore section 13, which is compared with the. Diameter of the inlet bore portion 9.1 is formed with a smaller diameter.
  • the inlet bore section 9.1 and the bore section 13 are accommodated coaxially with one another and executed at a first angle of inclination 11 with respect to the axis 19 of the injector body 2.
  • a valve space 14 is formed laterally from the transitional region 20 between the inlet bore section 9.1, the bore section 13 in a reduced diameter and the nozzle supply bore 9 extending vertically through the injector body 2.
  • a valve member is movably arranged (not shown here), which can be actuated by a likewise not shown, to be arranged within the mounting space 4 actuator such as a solenoid valve assembly.
  • the inner wall 17 of the valve chamber 14 within the injector body 2 comprises a symmetrically formed annular groove 18.
  • the annular groove 18 is located approximately centrally within the bounded by the inner wall 17 valve chamber 14.
  • actuator such as a solenoid valve assembly
  • an external thread 16 is provided, with which the actuator is fixed within the mounting space 4.
  • the injector body 2 is traversed by an almost vertical bore 15, which serves to control the leakage oil.
  • the figure II-II is to take a section through an inventively configured injector body, wherein the cutting path II-II FIG. 2 evident.
  • the inlet bore section 9.1 shown here in dashed lines, penetrates the connection region 5 of the connecting piece 6.
  • an inlet bore 22 branches off to the valve space 14, which is inclined with respect to the axis 19 of the injector body 2 by an angle 23, which is preferably selected to be greater than 70 °.
  • the inlet bore 22 extending from the end face 7 opens into the annular groove 18 formed in the wall 17 of the valve chamber 14.
  • the mouth of the inlet bore 22 to the valve chamber 14 is identified by the reference numeral 24.
  • the Zulaufbohrungsabites 9.1 which is shown in phantom in the sectional view II-II takes a gelcennbericht in Fig. 25 in the injector body 2.
  • the Zulaufbohrungsabites 9.1 passes through the one hand, the wall of the nozzle 6 at a first point 26, extending through the terminal portion 5, the is preferably formed as a thread, as well as through the end face 7 of the nozzle 6.
  • the inlet bore section 9.1 merges into a bore section 13, which is analogous to in FIG. 1 has shown and known from the prior art embodiment variant, a reduced diameter.
  • the inlet bore section 9.1 or the adjoining bore section 13 merges into the nozzle supply bore / throttle bore 9 formed vertically in the injector body 2 (shown here in dashed lines).
  • connecting region 5 which is provided as an internal thread, does not extend completely on the inside of the connecting piece 6 to the end face 7; between the Stirnf kaue 7 and preferably designed as an internal thread connecting portion 5 an annular chamfer 8 is attached
  • the transitional region 20 shown in the section II-II between the Zulaufbohrungsabmale 9.1, the bore portion 13 and the nozzle supply bore / throttle bore 9 also includes a Verschneidungsstelle 12, however has a much more favorable voltage curve due to their geometry, as will be described further below.
  • the bore 15 which serves for the return of leakage oil, is covered by the material of the injector body 2.
  • the bore 15 extends along the mounting space 4, within the Injector body 2 is formed, below an external thread 16 in the upper region of the injector 2 from.
  • FIG. 2 is the plan view of an inventively designed, slightly rotated injector body refer.
  • FIG. 2 shows that the nozzle 6 is arranged laterally on the injector body 2 of the fuel injector 1.
  • a connection region 5 is formed, which is preferably designed as an internal thread.
  • the inlet bore section 9.1 merges into a bore section 13, which is formed in a reduced diameter compared to the inlet bore section 9.1.
  • the point of intersection is identified in the transition region 20, not shown here, with reference number 12. From the top view FIG.
  • the sectional profile III-III shows the transition region of the inlet bore section or the bore section into the nozzle supply bore / throttle bore extending perpendicularly in the injector body.
  • the inlet bore section 9.1 which merges into a bore section 13 of reduced diameter, is designed at an optimized angle of inclination 30 with respect to the axis 19 of the injector body 2.
  • the inventively optimized angle of inclination 30 ensures a steep as possible course of the Zulaufbohrungsabêtes 9.1 or of this subsequent bore portion 13 reduced diameter with respect to the injector body 2 parallel to the central bore 3 traversing nozzle supply bore / throttle bore 9.
  • the optimized Inclination angle 30 is in a range between 15 ° and 25 °. Particularly good stress results are obtained when the optimized inclination angle 30 is in the range between 24 ° and 23 °.
  • the inlet bore section 9.1 terminates at a first location 26 on the outside of the nozzle 6; Furthermore, the inlet bore section 9.1 passes through the neck 6 on the inside in the region of the connection region 5, furthermore on the end face 7.
  • a comparison of the transition region 20 according to FIG. 1 with the transition region 20 according to the embodiment variant of the injector body 2 according to the invention shown in section III-III shows that the knee angle 10 according to FIG. 1 was increased by the embodiment of the invention in an optimized knee angle 29.
  • An increase in the knee angle from, for example, 143.5 ° to 157 ° leads to a reduction of the comparison stress within the transition region 20 (knee region). Further stress reduction within the transition region 20 of the bore portion of smaller diameter 13 into the nozzle supply bore / throttle bore 9 can be achieved by rounding the mouth edge of the bore portion 13 into the nozzle supply bore / throttle bore 9.
  • the voltage level occurring there can be further reduced.
  • the rounding within the transition region 20 can be done by various manufacturing processes and be made in the construction or design of the injector body 2 while maintaining its outer wall thickness 32.
  • transition region 20 (knee region) as far as possible from the wall 17 of the valve chamber 14 within the injector body 2. While maintaining a required minimum wall thickness 32 of the material of the injector body 2, an enlarged distance between the transition region 20 (knee area) and the wall 17 of the valve space 14 in the sectional profile III-III is indicated by reference numeral 31.
  • the outer wall thickness 32 can be kept larger on the injector body 2.
  • distance 21 between the valve chamber 14 and the knee region 20 results according to the section line according to III-III, a distance 31 between the valve chamber 14 and the transition region 20 (knee region) of about 1.5 to 1.8 mm, while in FIG. 1 with reference numeral 21 distance is only 1.2 to 1.3 mm.
  • a seal of the high pressure side i. the Zulaufbohrungsabiteses 9.1 the reduced diameter of this adjoining bore portion 13 and the nozzle supply bore / throttle bore 9 done by the high pressure reservoir (common rail) is screwed in the connection region 5 of the high pressure port and secured with the appropriate allowable tightening torque.
  • the upper, from the terminal portion 5 to the first point 26 extending inlet bore section 9.1 is sealed by the thread overlap against the end face 7, without the need for a further, to be inserted sealing element.
  • one and the same injector body 2 can be used by a modification of the bore layers of inlet bore section 9.1, bore section 13 and a corresponding design of the transition region 20 even at higher pressures, which may be about 1600 bar and higher.
  • the inner wall 17 of the valve chamber 14 is provided with a symmetrical annular groove 18, into which the inlet bore 22 (not shown here) opens at an orifice 24 (also not shown here).
  • the valve chamber 14 merges at a transition 35 into the central bore 3 running vertically in the injector body 2, which receives, for example, an injection valve member designed as a nozzle needle and extending to the nozzle chamber.
  • the nozzle supply bore / throttle bore 9 acts on the fuel injector member surrounding, but not shown here nozzle space with high pressure fuel.
  • the mounting space 4 in the upper region of the injector body 2 for receiving an actuator in the form of a solenoid valve assembly comprises an internal thread 33, in which the solenoid valve assembly can be attached and an annular collar surface 34, which represents the transition region of the mounting space 4 in the valve chamber 14.
  • the maximum distance 31 between the transition region 20 (knee region) and the inner wall 17 of the valve space 14 finds its limitation in the minimum material thickness 32, which may take the outer wall of the injector body 2 of the fuel injector 1 to the strength requirements sufficient and safety reserves to form.
  • FIG. 3 shows a plan view of the injector body according to the invention.
  • the representation according to FIG. 3 can be taken that the bore 15, which is formed obliquely in the injector body 2 according to the sectional profile III-III, below an external thread 16 opens.
  • the mouth of the bore 15 opposite is on the top of the nozzle 6 to recognize the first point 26, from which the inlet bore section 9.1 extends through the connection portion 5 on the inside of the nozzle 6 and the end face 7 at the second position 27 (see. Section III-III) pierces.
  • the inlet bore 22 opens at an orifice 24 within a symmetrically formed in the valve chamber 14 annular groove 18, which leads to a reduction of the comparison voltage within the valve chamber 14 of about 20%.
  • the inlet bore portion 9.1 merges below the second location 27 into the reduced diameter bore portion 13 which merges into an almost perpendicularly oriented point of intersection 12 within the transition region 20 into the nozzle supply bore / restrictor bore 9 formed vertically in the injector body 2.
  • the inventively proposed solution allows, while maintaining the essential characteristics of the injector body 12, the pressure level at which the injector 2 can be acted to raise from about 1350 bar to over 1600 bar, without additional sealing elements are required.
  • the seal can be achieved by changing the position 25 of the Zulaufbohrungsabêtes 9.1, which passes through the nozzle 6, which is mounted laterally on the injector body 2, so that a sealing of the Zulaufbohrungsabêtes 9.1 can be done by the recorded in the connection area 5 at the nozzle 6 high pressure port.
  • the pressure level with which the inventively designed injector body 2 can now be applied is increased in particular by the fact that the inlet bore section 9.1 extends at an optimized angle of inclination 30 with respect to the axis 19 of the injector body 2, so that an optimized knee angle 29 in the transition region 20 in the inlet bore section 9.1 or bore section 13 and the nozzle feed bore / throttle bore 9 extending perpendicularly in the injector body 2 adjusts.
  • a reduction of the inclination angle 30 according to the Inventive solution leads to an enlargement of the knee angle 10 (see FIG. 1 ) to an optimized knee angle 29, such as 157 ° instead of 143.5 ° according to the prior art embodiments in FIG FIG.
  • the comparison stress in the transition area 20 can be further reduced, since a sharp-edged transition between the nozzle supply bore / throttle bore 9 and the bore section 13 of smaller diameter can be avoided by this measure.
  • the pressure level with which the inventively designed injector body 2 can be acted upon be increased by the fact that between the inner wall 17 of the valve chamber 14 and the transition region 20 as large a distance 31 is made, however, the permissible outer wall thickness 32 of the injector body 2 to note is.
  • a favorable course of the comparison voltage within the valve chamber 14 of the injector body 2 can be achieved by introducing a symmetrical annular groove 18 into the inner wall 17 delimiting the valve chamber 14.
  • inlet bore 22 in the valve chamber 14 and the arrangement of the discharge point within the symmetrical annular groove 18 is also a favorable influence on the voltage curve can be achieved.
  • the inlet bore 22 is formed at an angle 23 which is as shallow as possible (see section line II-II), which is more than 70 °, a favorable reference stress can be achieved in the injector body 2.

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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)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur de carburant pourvu d'un corps (2) comprenant une tubulure (6) disposée latéralement. Cette tubulure (6) comprend une zone de raccordement (5) présentant une face (7) à partir de laquelle s'étendent un passage d'admission (22) conduisant à une chambre de soupape (14) à l'intérieur du corps (2) de l'injecteur ainsi qu'une section de passage d'admission (9.1) alimentant un passage d'alimentation de buse (9) dans le corps (2) de l'injecteur. La section de passage d'admission (9.1) et le passage d'alimentation de buse (9) forment une zone de transition (20). La section de passage d'admission (9.1) s'étend à travers la zone de raccordement (5) et elle est orientée par rapport à l'axe (19) du corps (2) de l'injecteur selon un angle d'inclinaison (30) permettant d'obtenir une zone de transition (20) pratiquement sans intersection.

Claims (12)

  1. Injecteur de carburant comprenant un corps d'injecteur (2) qui comprend une tubulure (6) disposée latéralement, une région de raccordement (5) et une surface frontale (7), depuis laquelle s'étendent un alésage d'amenée (22) conduisant à un espace de soupape (14) à l'intérieur du corps d'injecteur (2) et une portion d'alésage d'amenée (9.1) sollicitant un alésage d'alimentation de buse (9) dans le corps d'injecteur (2) et l'alésage d'alimentation de buse (9) formant, avec la portion d'alésage d'amenée (9.1), une région de transition (20), caractérisé en ce que la portion d'alésage d'amenée (9.1) s'étend à travers la région de raccordement (5) de la tubulure (6) et est disposée, par rapport à l'axe (19) du corps d'injecteur (2) suivant un angle d'inclinaison (30) permettant d'obtenir une région de transition (20) pratiquement sans coupure.
  2. Injecteur de carburant selon la revendication 1, caractérisé en ce que la région de raccordement (5) est réalisée sous forme de filetage de raccordement.
  3. Injecteur de carburant selon la revendication 1, caractérisé en ce que la portion d'alésage d'amenée (9.1) s'étend à travers la surface frontale (7) et la région de raccordement (5) de la tubulure (6).
  4. Injecteur de carburant selon la revendication 1, caractérisé en ce que l'angle d'inclinaison (30) entre la portion d'alésage d'amenée (9.1) et l'axe (19) du corps d'injecteur (2) est inférieur à 35°.
  5. Injecteur de carburant selon la revendication 1, caractérisé en ce que l'angle d'inclinaison (30) est inférieur à 30°.
  6. Injecteur de carburant selon la revendication 1, caractérisé en ce que l'angle d'inclinaison (30) est de préférence inférieur à 25°.
  7. Injecteur de carburant selon la revendication 1, caractérisé en ce qu'une rainure annulaire (18) est réalisée dans une paroi (17) de l'espace de soupape (14), dans laquelle débouche un alésage d'amenée (22) s'étendant depuis la surface frontale (7) de la tubulure (6) suivant un angle (23), lequel est ≥ à 70°.
  8. Injecteur de carburant selon la revendication 7, caractérisé en ce que l'alésage d'amenée (22) débouche dans un décalage angulaire (28) dans la rainure annulaire (18) de l'espace de soupape (14), par rapport à la normale obtenue perpendiculairement à l'axe (19) du corps d'injecteur (2).
  9. Injecteur de carburant selon la revendication 1, caractérisé en ce que, dans la région de transition (20), entre la portion d'alésage d'amenée (9.1) et l'alésage d'alimentation de buses (9) est réalisée une portion arrondie provoquant une diminution de la tension.
  10. Injecteur de carburant selon la revendication 1, caractérisé en ce que la région de transition (20) est disposée à l'intérieur du corps d'injecteur (2) à une plus grande distance (31) de l'espace de soupape (14).
  11. Injecteur de carburant selon la revendication 1, caractérisé en ce que la portion d'alésage d'amenée (9.1) traverse la tubulure (6) dans la région de raccordement (5) en un premier emplacement (26) et la surface frontale (7) de la tubulure (6) en un deuxième emplacement (27).
  12. Injecteur de carburant selon la revendication 1, caractérisé en ce que la portion d'alésage d'amenée (9.1) se prolonge avant la région de transition (20) par une portion d'alésage (13) de diamètre réduit.
EP03724837A 2002-07-31 2003-03-18 Injecteur de carburant comprenant une zone de raccordement resistant a haute pression Expired - Lifetime EP1527272B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10234909A DE10234909A1 (de) 2002-07-31 2002-07-31 Kraftstoffinjektor mit hochdruckfestem Anschlußbereich
DE10234909 2002-07-31
PCT/DE2003/000882 WO2004016937A1 (fr) 2002-07-31 2003-03-18 Injecteur de carburant comprenant une zone de raccordement resistant a haute pression

Publications (2)

Publication Number Publication Date
EP1527272A1 EP1527272A1 (fr) 2005-05-04
EP1527272B1 true EP1527272B1 (fr) 2010-11-17

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Application Number Title Priority Date Filing Date
EP03724837A Expired - Lifetime EP1527272B1 (fr) 2002-07-31 2003-03-18 Injecteur de carburant comprenant une zone de raccordement resistant a haute pression

Country Status (5)

Country Link
EP (1) EP1527272B1 (fr)
JP (1) JP4340231B2 (fr)
KR (1) KR100970298B1 (fr)
DE (2) DE10234909A1 (fr)
WO (1) WO2004016937A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100621110B1 (ko) * 2005-01-11 2006-09-13 삼성전자주식회사 냉장고
WO2006080109A1 (fr) 2005-01-25 2006-08-03 Fujitsu Limited Composant a semi-conducteur dote d'une structure mis et son procede de fabrication
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EP1527272A1 (fr) 2005-05-04
JP2005534861A (ja) 2005-11-17
JP4340231B2 (ja) 2009-10-07
DE10234909A1 (de) 2004-02-19
KR100970298B1 (ko) 2010-07-16
WO2004016937A1 (fr) 2004-02-26
KR20050026036A (ko) 2005-03-14
DE50313269D1 (de) 2010-12-30

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