EP1452727B1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1452727B1
EP1452727B1 EP20040003350 EP04003350A EP1452727B1 EP 1452727 B1 EP1452727 B1 EP 1452727B1 EP 20040003350 EP20040003350 EP 20040003350 EP 04003350 A EP04003350 A EP 04003350A EP 1452727 B1 EP1452727 B1 EP 1452727B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve according
slave
section
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 - Fee Related
Application number
EP20040003350
Other languages
German (de)
English (en)
Other versions
EP1452727A1 (fr
Inventor
Klaus Noller
Michael Huebel
Thomas Gerschwitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10360449A external-priority patent/DE10360449A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1452727A1 publication Critical patent/EP1452727A1/fr
Application granted granted Critical
Publication of EP1452727B1 publication Critical patent/EP1452727B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • EP 0 477 400 A1 discloses an arrangement for an adaptive mechanical tolerance compensation acting in the stroke direction for a travel transformer of a piezoelectric actuator for a fuel injection valve.
  • the stroke of the actuator is transmitted via a hydraulic chamber.
  • the hydraulic chamber has a defined leak with a defined leak rate.
  • the stroke of the actuator is introduced via a master piston in the hydraulic chamber and transmitted via a slave piston to a driven element.
  • This element is for example a valve needle of a fuel injection valve.
  • a slave piston In the master cylinder, a slave piston is guided, which also closes the master cylinder and thereby forms the hydraulic chamber.
  • a spring In the hydraulic chamber, a spring is arranged, which presses apart the master cylinder and the slave piston.
  • this stroke movement is due to the pressure of a hydraulic fluid in the hydraulic chamber on the Transfer slave piston, since the hydraulic fluid in the hydraulic chamber can not compress and only a small proportion of the hydraulic fluid can escape through the annular gap during the short period of a stroke.
  • the slave piston In the resting phase, when the actuator exerts no pressure force on the master cylinder, the slave piston is pushed out of the cylinder by the spring and by the resulting negative pressure penetrates through the annular gap, the hydraulic fluid in the hydraulic chamber and fills it again.
  • the hydraulic coupler automatically adjusts to length expansions and pressure-related expansions of a fuel injection valve.
  • the sealing of the hydraulic medium takes place via sealing rings.
  • fuel injection valves are known from the prior art, which seal hydraulic medium by flexible sections, for example in corrugated or bellows-shaped design.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the flexible section is reliably protected from unacceptably high strain or stress and so the coupler simple and inexpensive to produce, less expensive and reliable reliable running.
  • the stopper body is shaped like a sleeve.
  • the stopper body can be so easy to manufacture and assemble.
  • the slave piston at least partially consists of a cup-shaped first slave section, the bottom of which partially limits the coupler volume, and the master piston encloses the first slave section in a partially cup-shaped manner. This makes it possible to build the slave piston-master piston assembly very easy. It is likewise advantageous if the upper end of the first slave section projects beyond the upper end of the master piston.
  • the slave piston has a second slave section which is immovably connected to the first slave section or the second slave section additionally has a diameter shoulder whose diameter is greater than that of the first slave section and which is about the same size as the master piston diameter.
  • the throttle comprises a throttle ball, which is guided with a throttle gap in an opening
  • the throttle can be constructed in a particularly simple manner and, if the throttle ball is supported on a surface bounding the coupler volume of the master piston, be advantageously constructed for the function of the coupler.
  • one end of the flexible portion on the slave piston and / or the other end of the flexible portion is hermetically sealed to the master piston, in particular positive and / or non-positive.
  • the flexible section can be particularly easily integrated into the coupler.
  • At least one respective recess is arranged in the radial outer surfaces of the master piston and / or the slave piston, which is in particular annular and in which engages at least one of the ends of the flexible portion.
  • At least one recess is trough-shaped.
  • the end of the recess engaging in the flexible portion can be particularly easily secured against axial displacements.
  • the stopper body is fixed in at least one of the ends of the flexible portion in at least one of the recesses positively and / or non-positively and hermetically sealed.
  • the coupler can be made very compact.
  • the stop has an evasive volume.
  • the flexible section can thereby at a well-defined place and in a through the Extend shape of the escape volume fixed advantageous shape.
  • the evasion volume is also advantageous to arrange the evasion volume approximately at the level of the middle of the flexible section.
  • the flexible section can thereby be evenly loaded.
  • the evasive volume can be made particularly easy.
  • stop body at least in two parts in a first stop section and a second stop section, wherein the two stop sections are divided by a particular annular stop gap.
  • the stop gap is advantageously arranged at the height of the center of the escape volume.
  • the flexible section is characterized mechanically stressed evenly and the stop gap can be easily mounted, for example, by laser welding after mounting on the coupler.
  • FIGS. 1 and 2 Before the invention is described in more detail with reference to preferred embodiments, a fuel injection valve according to the prior art in its essential components in FIGS. 1 and 2 is briefly explained for better understanding. Matching components are provided in the figures with corresponding reference numerals.
  • the fuel injection valve 1 shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 comprises a housing 2, in which a provided with an Aktorumspritzung 3 piezoelectric or magnetostrictive actuator 4 is arranged.
  • the actuator 4 can be supplied by means of an electrical line 5, to which a protruding from the housing 2 electrical terminal 6, an electrical voltage can be supplied.
  • the actuator 4 is supported on the inflow side a master piston 9 of a hydraulic coupler 7 and downstream of an actuator head 8 from.
  • the hydraulic coupler 7 further comprises a slave piston 10, a compression spring 11, which biases the hydraulic coupler 7, and a compensation chamber 12, which is filled with a hydraulic medium.
  • the fuel is fed centrally via an inlet 14.
  • an actuating body 15 Downstream of the actuator head 8, an actuating body 15 is arranged, which acts on a valve needle 16.
  • the valve needle 16 has at its downstream end a valve closing body 17. This acts together with a valve seat surface 18, which is formed on a nozzle body 19, to form a sealing seat.
  • a return spring 20 acts on the valve needle 16 so that the fuel injection valve 1 remains in the de-energized state of the actuator 4 in the closed state. Furthermore, it ensures the return of the valve needle 16 after the injection phase.
  • the nozzle body 19 is fixed by means of a weld 21 in an inner housing 22, which seals the actuator 4 against the fuel.
  • the fuel flows from the inlet 14 between the housing 2 and the inner housing 22 to the sealing seat.
  • FIG. 2 shows a coupler 7 constructed similarly to the coupler shown in FIG.
  • Hydraulic couplers 7 in fuel injection valves 1 are usually designed on the one hand for conversion or translation of the stroke of the actuator 4 on the valve needle 16 and / or on the other hand to compensate for temperature-induced changes in length of the actuator 4 and the housing 2.
  • the latter is realized, as shown in the exemplary embodiment, by means of the coupler 7 designed as a second medium coupler, which contains a hydraulic medium not in contact with the fuel.
  • the hydraulic medium fills the compensation chamber 12 and a coupler volume 23 formed between master piston 9 and slave piston 10, which is connected to the compensation chamber 12 via a throttle 24.
  • the compensation chamber 12 is disposed inside and outside the slave piston 10, wherein the two parts are connected by a transverse bore 31 and the outboard part of the compensation chamber 12 is sealed by means of a corrugated pipe seal designed as flexible portion 13 relative to the fuel injector 1 flowing through the fuel. In the event of temperature changes, hydraulic medium is exchanged between the coupler volume 23 via the throttle 24 with the compensation chamber 12.
  • the necessary filling pressure is applied via the pressure piston 11 arranged in the slave piston 10 in a pressure storage chamber 32. This is arranged between a first closure body 25 and a second closure body 26, the former having a groove 27 with a sealing ring 28 arranged therein for sealing the coupler space 12.
  • the filling of the coupler 7, for example in the production, with hydraulic medium takes place through a channel 29, which may be closed, for example by means of a pressed-in closure ball 30.
  • FIG. 3 shows an exemplary embodiment of a coupler 7 for a fuel injection valve 1 configured according to the invention.
  • the slave piston 10 engages with a cup-shaped first slave section 34 in the hollow-cylindrical master piston 9 closed on one side.
  • the slave piston 10 or the first slave section 34 is axially movably guided in the master piston 9 with a guide gap 38.
  • the guide gap 38 is relatively small, wherein the amount flowing through the guide gap 38 of hydraulic medium very is small. In other embodiments, the guide gap 38 may exert a throttle function.
  • the slave piston 10 of the first slave portion 34 and a second slave portion 35 defines with its closed end together with the bottom of the master piston 9, the coupler volume 23, wherein centered in the closed end of the first slave section 34, the throttle 24th is arranged.
  • the throttle 24 consists of an opening 36 centered in the bottom of the cup-shaped first slave section 24 and a throttle ball 39 guided therein with a throttle gap 37.
  • the open, the coupler volume 23 facing away from the end of the first slave section 34 is closed by the second slave section 35.
  • the second slave section 35 engages partially in the first slave section 34 and is joined, for example by pressing or welding with this motion.
  • the compression spring 11 is arranged with a bias in a arranged in the first slave section 34 spring chamber 45.
  • the compression spring 11 is spirally and presses on the throttle ball 39 with the interposition of a spring plate 40, wherein the throttle ball 39 is supported at the bottom of the master piston 9 in the coupler volume 23.
  • the upper, the coupler volume 23 facing away from the ends of the first slave section 34 and the master piston 9 are approximately at the same height, the end of the first slave section 34 projects slightly beyond the end of the master piston 9.
  • the second slave section 35 partially engaging the first slave section 34 extends its diameter through a step 44 above the upper end of the first slave section 34 to a flange-like diameter shoulder 46, the diameter shoulder 46 in this embodiment having its lower, first Nehmerabrough 34 facing side rests on the upper end of the first slave section 34.
  • the diameter shoulder 46 has approximately the diameter of the master piston 9.
  • the compensation chamber 12 is limited by the flexible portion 13, the second slave portion 35 with its diameter shoulder 46, the master piston 9 and the first slave section 34, wherein the compensation chamber 12 via the transverse bore 31 and the spring chamber 45 communicates with the throttle 24.
  • the channel 29 with the closure ball 30 is realized coaxially in the second slave section 35 through a bore which opens into the spring chamber 45.
  • the flexible portion 13 may be elastic and is preferably made of an elastomer.
  • the flexible portion 13 is a hollow cylindrical or sleeve-shaped and arranged coaxially with the pistons 9, 10, wherein the ends and the lower and upper edges are each thickened.
  • the flexible portion 13 lies with the upper end in a trough-shaped first recess 42 which is formed in the radial outer surface of the second slave portion 35 and the fürmesserabsatzes 46, and with its lower end in a trough-shaped second recess 43, which in the region of the outer surface the upper end of the master piston 9 is arranged.
  • the axial extent of the recesses 42, 43 is in each case slightly larger than the axial extent of the thickened ends. As a result, in particular the assembly is facilitated.
  • a two-part executed in the exemplary embodiment sleeve-shaped stopper body 33 is precisely aligned over the diameter shoulder 46, the flexible portion 13 and the upper portion of the master piston 9 pulled.
  • the stopper body 33 consists of an upper first stopper portion 47 and a lower second stopper portion 48.
  • the first stopper portion 47 is fixed to movement with the slave piston 10 and the second Nehmerabrough 35 joined, for example by welding or pressing.
  • the second stopper portion 48 is immovably joined to the master piston 9, for example by welding or pressing.
  • the first stop section 47 has a retraction 49, at which the diameter of the first stop section 47 tapers. Thereby, the first stopper portion 47 can be mounted more easily.
  • the stopper body 33 Approximately at the level of the middle of the flexible portion 13 of the stopper body 33 is bent away at an alternate portion 51, for example, round and in particular circular segment-shaped, from the flexible portion 13. This creates between the flexible portion 13 and the stopper body 33 and the escape portion 51, an evasive volume 52, in which the flexible portion 13 can expand at inflow of hydraulic medium from the coupler volume 23.
  • the stopper body 33 limits the extension of the flexible portion 13, which takes place with a movement directed towards the axial movement axis of the pistons 9, 10 with a radial direction component, and protects it from damage.
  • the axial extent of the escape portion 51 extends between the thickened ends of the flexible portion 13 and does not enclose them, so that the thickened ends can be reliably pressed by the stopper body 33 hermetically sealed in the recesses 42, 43.
  • a stop gap 50 separates the two stop sections 47, 48.
  • the dynamic stiffness of the coupler 7 is determined in particular by the size and shape of the throttle gap 37 and possibly by the size and shape of the guide gap 38.
  • FIG. 4 shows a second exemplary embodiment of a fuel injection valve according to the invention in the region of the coupler 7.
  • the cup-shaped slave piston 10 engages with its open end first in the one-sided closed hollow-cylindrical master piston 9, wherein the open end of the slave piston 10 is closed with a throttle disk 41.
  • the slave piston 10 is axially movably guided in the master piston 9 with a guide gap 38.
  • the guide gap 38 is relatively small, wherein the amount of hydraulic medium flowing through the guide gap 38 is very small. In other embodiments, the guide gap 38 may exert a throttle function.
  • the slave piston 10 is limited with its closed by the throttle disk 41 end together with the bottom of the master piston 9, the coupler volume 23.
  • throttle disk 41 In the throttle disk 41 is centered which designed as a relatively thin bore throttle 24 is arranged.
  • the sealed by the closure ball 30 channel 29 extends centered in the master piston 9 and opens directly into the coupler volume 23.
  • the arranged in the slave piston 10 above the upper edge of the master piston 9 transverse bore 31 connects via the interior of the slave piston 10 the compensation chamber 12 with the throttle 24th
  • the compensation chamber 12 is bounded by the upper edge of the master piston 9, the slave piston 10 and the flexible portion 13.
  • the flexible portion 13 is made of an elastomer and is sleeve-shaped, with its diameter tapers from the master piston 9 upwards.
  • the upper end of the flexible portion 13 is clamped between a piston 10 which tapers the diameter of the slave piston 10 in the upper region, and a cover 53 comprising the upper region of the slave piston 10.
  • the lower end of the flexible portion 13 is clamped in the arranged in the outer surface of the master piston 9 second recess 43 through the sleeve-shaped in this embodiment, and the master piston 9 accurately comprehensive stop body 33.
  • the invention is not limited to the illustrated embodiments and suitable for any designs of fuel injectors 1, in particular for fuel injectors 1 for auto-ignition internal combustion engines and / or inwardly opening fuel injectors.

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

Claims (28)

  1. Injecteur de carburant muni d'un actionneur (4) piézoélectrique ou magnétostrictif qui actionne un obturateur de soupape (17) qui coopère avec une surface de siège de soupape (18) pour former un siège d'étanchéité, et comprenant un coupleur hydraulique (7) qui présente un piston capteur (9), un piston récepteur (10) et un volume de coupleur (23) situé entre ceux-ci, le piston capteur (9) et le piston récepteur (10) étant mobiles axialement l'un par rapport à l'autre, le volume de coupleur (23) étant relié par un étranglement (24) à une chambre de compensation (12), un segment flexible (13) limitant au moins partiellement la chambre de compensation (12), et le volume de coupleur (23), l'étranglement (24) et la chambre de compensation (12) étant remplis par un fluide hydraulique, le segment flexible (13) étant limité au niveau de sa longueur orientée vers l'extérieur par un corps de butée (33),
    caractérisé en ce que
    le corps de butée (33) présente la forme d'une douille.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le piston récepteur (10) comprend au moins partiellement un premier segment récepteur (34) en forme de tasse dont le fond limite en partie le volume de coupleur (23).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le piston capteur (9) entoure le premier segment récepteur (34) en partie en forme de tasse.
  4. Injecteur de carburant selon la revendication 2 ou 3,
    caractérisé en ce que
    l'extrémité supérieure du premier segment capteur (34) dépasse de l'extrémité supérieure du piston capteur (9).
  5. Injecteur de carburant selon l'une quelconque des revendications 2 à 4,
    caractérisé en ce que
    le piston récepteur (10) présente un second segment récepteur (35) solidaire en mouvement avec le premier segment récepteur (34).
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    le second segment récepteur (35) présente un talon diamétral (46) dont le diamètre est supérieur à celui du premier segment récepteur (34) et sensiblement égal à celui du piston capteur (9).
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce que
    le talon diamétral (46) repose sur l'extrémité supérieure de premier segment récepteur (34).
  8. Injecteur de carburant selon l'une quelconque des revendications 2 à 7,
    caractérisé en ce que
    l'étranglement (24) est disposé dans le fond du premier segment récepteur (34) en forme de tasse.
  9. Injecteur de carburant selon l'une quelconque des revendications 2 à 8,
    caractérisé en ce que
    l'extrémité axiale supérieure du premier segment récepteur (34) détournée du volume de coupleur (23) dépasse de l'extrémité axiale supérieure du piston capteur (9) détournée du volume de coupleur (23).
  10. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'étranglement (24) comprend une sphère d'étranglement (39) qui est guidée avec un jeu d'étranglement (37) dans une ouverture (36).
  11. Injecteur de carburant selon la revendication 10,
    caractérisé en ce que
    la sphère d'étranglement (39) prend appui sur une surface du piston capteur (9) limitant le volume de coupleur (23).
  12. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    une extrémité du segment flexible (13) est fixée de façon étanche hermétiquement au piston récepteur (10) et/ou l'autre extrémité du segment flexible (13) au piston capteur (9), en particulier par complémentarité de formes et/ou de forces.
  13. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    au moins un évidement (42, 43) est disposé respectivement dans les surfaces extérieures radiales du piston capteur (9) et/ou du piston récepteur (10) .
  14. Injecteur de carburant selon la revendication 13,
    caractérisé en ce qu'
    au moins un des évidements (42, 43) présente la forme d'une rainure annulaire.
  15. Injecteur de carburant selon la revendication 13 ou 14,
    caractérisé en ce qu'
    au moins une des extrémités du segment flexible (13) s'engage dans au moins un des évidements (42, 43).
  16. Injecteur de carburant selon l'une quelconque des revendications 13 à 15,
    caractérisé en ce qu'
    au moins un des évidements (42, 43) présente la forme d'un creux.
  17. Injecteur de carburant selon l'une quelconque des revendications 13 à 16,
    caractérisé en ce que
    le corps de butée (33) fixe par complémentarité de formes et/ou de forces et de façon étanche hermétiquement au moins une des extrémités du segment flexible (13) dans au moins un des évidements (42, 43).
  18. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les extrémités du segment flexible (13) sont épaissies.
  19. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le corps de butée (33) présente un volume d'évitement (52).
  20. Injecteur de carburant selon la revendication 19,
    caractérisé en ce que
    le volume d'évitement (52) est disposé sensiblement au niveau du centre du segment flexible (13).
  21. Injecteur de carburant selon la revendication 19 ou 20,
    caractérisé en ce que
    le segment flexible (13) s'étend dans le volume d'évitement (52) lors d'une réduction du volume de coupleur (23).
  22. Injecteur de carburant selon l'une quelconque des revendications 19 à 21,
    caractérisé en ce que
    le volume d'évitement (52) est formé par un évasement vers l'extérieur d'une partie de l'évolution axiale de la butée (33).
  23. Injecteur de carburant selon la revendication 22,
    caractérisé en ce que
    la partie de l'évolution axiale du corps de butée (33) formant le volume d'évitement (52) est évasée vers l'extérieur de façon ronde, en particulier en forme de segment de cercle.
  24. Injecteur de carburant selon l'une quelconque des revendications 19 à 23,
    caractérisé en ce que
    le corps de butée (33) est divisé en au moins un premier segment de butée (47) et un second segment de butée (48).
  25. Injecteur de carburant selon la revendication 24,
    caractérisé en ce que
    le corps de butée (33) est divisé par une fente de butée (50), en particulier une fente de butée annulaire (50).
  26. Injecteur de carburant selon la revendication 25,
    caractérisé en ce que
    la fente de butée (50) est au centre du volume d'évitement (52).
  27. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la chambre de compensation (12) est limitée par le segment flexible (13), le piston récepteur (10) et le piston capteur (9).
  28. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le segment flexible (13) est élastique et en particulier réalisé à partir d'un élastomère.
EP20040003350 2003-02-27 2004-02-14 Injecteur de carburant Expired - Fee Related EP1452727B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10308635 2003-02-27
DE10308635 2003-02-27
DE10360449A DE10360449A1 (de) 2003-02-27 2003-12-22 Brennstoffeinspritzventil
DE10360449 2003-12-22

Publications (2)

Publication Number Publication Date
EP1452727A1 EP1452727A1 (fr) 2004-09-01
EP1452727B1 true EP1452727B1 (fr) 2007-01-24

Family

ID=32773168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040003350 Expired - Fee Related EP1452727B1 (fr) 2003-02-27 2004-02-14 Injecteur de carburant

Country Status (2)

Country Link
EP (1) EP1452727B1 (fr)
DE (1) DE502004002718D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10357454A1 (de) * 2003-12-03 2005-07-07 Robert Bosch Gmbh Brennstoffeinspritzventil
DE602005020172D1 (de) * 2005-12-12 2010-05-06 Continental Automotive Italy S Einpritzventil und Herstellungsverfahren eines solchen Einspritzventils
EP1826398A1 (fr) * 2006-01-24 2007-08-29 Siemens VDO Automotive S.p.A. Injecteur, assemblage de compensation pour l'injecteur et dispositif de dégagement pour l'assemblage de compensation, procédé d'assemblage et d'étalonnage de l'injecteur et procédé de production du dispositif de dégagement
EP1811167A1 (fr) * 2006-01-24 2007-07-25 Siemens VDO Automotive S.p.A. Injecteur, compensateur pour l'injecteur, dispositif de décharge pour le compensateur ainsi que méthodes d'assemblage et de calibration associées

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477400B1 (fr) * 1990-09-25 2000-04-26 Siemens Aktiengesellschaft Dispositif compensateur de tolérance dans la direction de mouvement du transformateur de déplacement d'un dispositif d'actionnement piézoélectrique
DE19950760A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10148594A1 (de) * 2001-10-02 2003-04-10 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10230089A1 (de) * 2002-07-04 2004-01-15 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
EP1452727A1 (fr) 2004-09-01
DE502004002718D1 (de) 2007-03-15

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