EP1799994B1 - Injecteur de carburant comportant un siege de soupape estampe destine a reduire la derive de levee d'armature - Google Patents

Injecteur de carburant comportant un siege de soupape estampe destine a reduire la derive de levee d'armature Download PDF

Info

Publication number
EP1799994B1
EP1799994B1 EP05804893A EP05804893A EP1799994B1 EP 1799994 B1 EP1799994 B1 EP 1799994B1 EP 05804893 A EP05804893 A EP 05804893A EP 05804893 A EP05804893 A EP 05804893A EP 1799994 B1 EP1799994 B1 EP 1799994B1
Authority
EP
European Patent Office
Prior art keywords
valve seat
valve
fuel injector
closing element
closing
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.)
Ceased
Application number
EP05804893A
Other languages
German (de)
English (en)
Other versions
EP1799994A1 (fr
Inventor
Markus Rueckle
Axel Schnaufer
Joachim Leicht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1799994A1 publication Critical patent/EP1799994A1/fr
Application granted granted Critical
Publication of EP1799994B1 publication Critical patent/EP1799994B1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • 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
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0077—Valve seat details

Definitions

  • the fuel is supplied to the individual combustion chambers of the internal combustion engine via fuel injectors with hydraulically actuated nozzle needle.
  • a valve is received in the fuel injector, which is driven, for example, electromagnetically or by means of a piezoelectric actuator.
  • an outlet throttle of a control chamber which communicates with the nozzle needle, released or closed.
  • a method for producing a fuel injector with a control valve which opens or closes a drain from a control chamber through a valve seat placed in a closing element, wherein the valve seat is formed by stamping with an embossing die.
  • an injector for a fuel injection system is known. Through the injector, a control chamber is released or closed, which has an outlet throttle in a drain.
  • a valve piece is received in the housing of the fuel injector, in which an outlet throttle is formed, which is in communication with a control chamber.
  • the outlet throttle is released or closed by a closing element.
  • a conical valve seat is formed in the valve piece, in which the outlet throttle opens.
  • a spherical closing element is placed in the conical valve seat.
  • the closing element of the control valve is placed at high speed in his seat or lifted from this.
  • This constant switching of the closing element leads to wear of the valve seat.
  • This wear results in a Ankerhubdrift. That is, the path the closing element travels to close the drainage restrictor increases due to wear.
  • the increased stroke of the closing element causes the stroke of the magnet armature is also increased in a solenoid-controlled valve or the Aktorhub in a piezoelectric actuator. This results in larger opening and closing times of the control valve and thus longer opening times of Einspritzöf Anlagen, which in turn results in higher injection quantities.
  • These larger injection quantities of fuel into the combustion chambers of the internal combustion engine lead to higher engine emissions and higher combustion noise.
  • the embossing die according to the invention is designed in the form of a sphere with tangentially grown truncated cone.
  • the truncated cone has an opening angle which is greater than or equal to the opening angle of the cone-shaped valve seat. This avoids that material, which is displaced by the embossing, forms an elevation at the side of the embossing point facing the outlet throttle. This increase leads to a stronger throttling of the fuel flow when the valve is open. As a result, the fuel volume flow flowing out of the control chamber is reduced and the opening speed of the injection openings is likewise reduced.
  • the stamp is preferably provided with a surface which consists of a hard metal.
  • the entire die is made of a hard metal.
  • Carbides known to the person skilled in the art are, for example, sintered materials of tungsten carbide, titanium carbide, tantalum carbide, molybdenum carbide and cobalt.
  • the hard metal preferably has a hardness in the range of 1300-1800 HV30.
  • valve seat is formed by stamping
  • valve seat of the control valve is conical.
  • the preferred closing element for closing or releasing the cone-shaped valve seat is spherical
  • valve seat is formed in a valve piece, which is accommodated in the housing of the fuel injector
  • FIG. 1 shows a fuel injector for a high-pressure accumulator injection system.
  • a fuel injector 1 comprises an injector body 2, in which a valve piston 3 is guided.
  • the valve piston 3 acts with a front side 4 on a pressure pin 5, which is formed on a nozzle needle 6.
  • the valve piston 3 exerts a pressure force on the pressure pin 5 of the nozzle needle 6 with its end face 4.
  • the nozzle needle 6 is placed in a seat 8 and so closed the at least one injection opening 7.
  • a compression spring spring element 9 acts on the nozzle needle 6.
  • the spring element 9 designed as a compression spring is preferably a spiral spring.
  • the spring element 9 is received in a valve chamber 10.
  • the spring element 9 acts with one side on a stepped extension 11 of the nozzle needle 6 and with the other side against an end face 12 of the valve chamber 10th
  • connection piece 13 which is connected to a high-pressure accumulator, not shown here.
  • a fuel filter 14 is received, in which the fuel is cleaned by particles contained therein to avoid damage due to abrasion in the fuel injector 1.
  • the fuel filter 14 is followed by a channel 15, via which the fuel passes into a nozzle chamber 16. From the nozzle chamber 16, the fuel flows via an annular gap 17 to the injection port 7.
  • valve piston 3 ends in a control chamber 18.
  • the control chamber 18 is supplied with fuel via an inlet throttle 19.
  • the inlet throttle 19 also adjoins the fuel filter 14, so that there is also system pressure on the inflow side of the inlet throttle 19.
  • From the control chamber 18, the fuel passes through an outlet throttle 20 in a low-pressure side discharge nozzle 21, which is connected, for example, with a fuel tank, not shown here.
  • the outlet throttle 20 can be closed or released by a ball-shaped closing element 22 here.
  • the actuation of the closing element 22 takes place in the embodiment variant shown here via an electrically controlled solenoid valve 23.
  • a piezoelectric actuator possibly with the interposition of a hydraulic coupler or a pressure booster could be used to actuate the closing element 22.
  • a valve member 24 is inserted into the injector body 2, in which the control chamber 18 including inlet throttle 19 and outlet throttle 20 is formed. Furthermore, in the valve piece 24, a bore 25 is executed, in which the valve piston 3 is guided
  • Figure 1.1 shows the detail A from FIG. 1 .
  • Figure 1.1 shows the valve piston 3 in its upper position, that is, with an open injection port 7.
  • the outlet throttle 20 is closed.
  • the closing element 22 is placed in a valve seat 26.
  • the closing element 22, the outlet throttle 20 closes pressure-tight, the valve seat 26 is formed in a conically shaped end face 32 of the valve member 24.
  • the outlet throttle 20 opens to the closing element 22 in the form of a cone.
  • the pressure in the control chamber 18 also rises again to system pressure. Due to the increasing pressure in the control chamber 18, the pressure force acting on the valve piston 3 increases and the valve piston 3 is moved in the direction of the at least one injection opening 7. Since the valve piston 3 is in communication with the pressure pin 5 of the nozzle needle 6 via the end face 4, the nozzle needle 6 is likewise moved in the direction of the at least one injection opening 7 and closes it.
  • the closing element 22 is connected via a piston 29 to an armature of the solenoid valve 23.
  • a piezoelectric actuator instead of the solenoid valve 23 of the piezoelectric actuator acts directly on the piston 29th
  • the valve seat 26 is formed in the fuel injector according to the invention.
  • embossing the Hertzian surface pressure is reduced by an increase in the bearing ratio. This means that the contact surface of the closing element 22 on the valve seat 26 is increased by the stamping. Due to the reduced surface pressure, a lower force acts on the valve seat 26, whereby its wear is reduced.
  • Another advantage of the form-stamping of the valve seat 26 is that the material is solidified in the embossing area. The material hardening results in a further reduction of wear. Also roughness peaks that arise due to production, smoothed
  • valve seat 26 By stamping the valve seat 26, the seat wear is anticipated, thus minimizing wear between the valve seat 26 and the closure member 22 during operation. As a result, the increase in the pilot injection quantity due to the increased during operation of the fuel injector armature stroke can be largely prevented. Increasing injection quantities during operation of the internal combustion engine lead to increased emission of the internal combustion engine, to an increase in the combustion noise and to a greater load on the entire internal combustion engine.
  • an embossing die made of a hard metal is used, which is designed in the form of the closing element 22.
  • FIG. 2 shows a valve seat, in which an embossing stamp is placed.
  • valve seat 26 If such a survey forms during the stamping of the valve seat 26, the flow cross-section is reduced when the valve is open.
  • the valve thus acts as a throttle, whereby the fuel flow rate flowing from the outlet throttle 20 is reduced.
  • Such a reduced fuel volume flow leads to a slower pressure reduction in the control chamber 18 and thus also to a reduced opening speed of the nozzle needle 6. This also results in a changed injection behavior, which can adversely affect the combustion process in the combustion chamber of the internal combustion engine.
  • the truncated cone 31 preferably has an opening angle ⁇ 1 , which is greater than the opening angle ⁇ 2 of the valve seat 26. At the same opening angle ⁇ 1 of the truncated cone 31 and opening angle ⁇ 2 of the valve seat 26, it is possible that a part of the material in the stamping in Direction of the outlet throttle 20 is pressed. In this case, a burr forms at the transition from the valve seat 26 into the outlet throttle 20, at which the opening angle changes. This burr leads to a negative influence on the fuel flow.
  • the opening angle ⁇ 1 is greater by 0 to 10 degrees than the opening angle ⁇ 2 of the valve seat 26.
  • a larger opening angle ⁇ 1 of the truncated cone 31 causes the embossing point in the region of the valve seat 26 on the side of the truncated cone 31 forms a survey, which acts as an additional throttle for the fuel flow.
  • valve seat 26 Even with non-spherical closing element 22, wear on the valve seat 26 can be reduced by shaping the shape of the valve seat 26.
  • the closing element 22 may be formed next to the spherical shape, for example also in the form of a paraboloid or a cylinder.
  • the embossing stamp 30 In addition to the truncated cone 31, it is also possible for the embossing stamp 30 to end in the form of a cone whose point angle is greater than or equal to the opening angle ⁇ 2 of the valve seat 26.
  • Suitable material for the die is any material which is harder than the material from which the valve seat 26 is made.
  • Particularly suitable as material for the Embossing dies 30 are, for example, hard metals selected from the group of hard metals K 01 - K 40. Depending on the composition, the hardness of these hard metals is 1300-1800 HV 30.
  • the hard metals are sintered materials of tungsten carbide, titanium carbide, tantalum carbide, molybdenum carbide and cobalt.
  • pressure-resistant ceramics for example, which are harder than the material from which the valve seat 26 is made, are also suitable.
  • FIG. 3 shows a contour plot of a cone-shaped valve seat according to the prior art.
  • the length of the conically shaped end face 32 of the valve member 24 is shown in mm, in which the valve seat 26 is formed.
  • the ordinate 34 shows the surface roughness in ⁇ m.
  • the line designated by reference numeral 35 shows the surface of the conically shaped end face of the valve piece 24 before the closing element 22 is placed in the valve seat 26 for a first time. It can already be clearly seen here that the surface of the end face 32 of the valve piece 24 has a production-related roughness.
  • the million-time switching of the closing element 22 leads to wear in the valve seat 26. By the closing element 22 creates a recess 36 in the region of the valve seat 26.
  • the recess 36 has a depth of wear 37, which is significantly greater than the average surface roughness of the end face 32 of Valve piece 24. Due to the very small opening or closing paths of the closing element 22, the wear depth 37 leads to a significantly longer closing path for closing the control valve. This also leads to a slower closing of the injection opening 7 and thus to a larger amount of fuel which is injected into the combustion chamber. This leads to higher engine emissions and higher combustion noise
  • FIG. 4 shows a Konturthan a conically shaped valve seat, in which the valve seat is molded with a spherical die
  • FIG. 4 can be seen that the surface 35 is significantly smoother before the first closing of the control valve when the valve seat 26 is embossed.
  • the embossing depth in which the valve seat 26 is embossed is designated by reference numeral 39. Due to the spherical embossing punch the form-stamped valve seat 26 has the cross section of a circle segment. As a result, an elevation 40 forms toward the outlet throttle 20. The survey 40 leads when the outlet throttle 20 is open, that the flow area is reduced. For this reason, the valve seat 26 acts when the outlet throttle 20 is open as an additional throttle.
  • the material is solidified in the region of the valve seat 26.
  • This material consolidation as well as the larger contact surface of the closing element 22 in the valve seat 26 cause a recess 36 to form a recess 36 with a comparison to the non-embossed valve seat 26 only a small closing depth 37 even after a large number of opening and closing movements of the closing element 22.
  • FIG. 5 shows the end face 32 of the valve member 24 with molded therein valve seat 26 when a spherical die is used, in which tangentially from the ball a truncated cone grows.

Landscapes

  • 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)

Abstract

L'invention concerne un procédé de fabrication d'un injecteur de carburant (1) destiné à un moteur à combustion interne, comportant une soupape de commande ouvrant ou fermant un étranglement d'écoulement (20) d'une chambre de commande (18), la fermeture de l'étranglement d'écoulement (20) étant produite par disposition d'un obturateur (22) dans le siège de soupape (26). Le siège de soupape (26) est produit par estampage au moyen d'un poinçon d'estampage (30). L'invention concerne également un injecteur de carburant produit au moyen du dispositif selon l'invention.

Claims (3)

  1. Procédé de fabrication d'un injecteur de carburant (1) pour un moteur à combustion interne comprenant une soupape de commande, qui libère ou ferme une sortie d'un espace de commande (18) par un élément de fermeture (22) placé dans un siège de soupape (26), le siège de soupape (26) étant formé par gaufrage avec un poinçon de gaufrage (30), caractérisé en ce que la sortie de l'espace de commande (18) présente un étranglement de sortie (20) et le poinçon de gaufrage (30) est réalisé en forme de sphère avec un tronc de cône (31) s'élargissant tangentiellement depuis celle-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que le tronc de cône (31) présente un angle d'ouverture (α1) qui est supérieur ou égal à l'angle d'ouverture (α2) du siège de soupape (26) réalisé sous forme conique.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface du poinçon de gaufrage (30) se compose d'un métal dur.
EP05804893A 2004-10-09 2005-10-05 Injecteur de carburant comportant un siege de soupape estampe destine a reduire la derive de levee d'armature Ceased EP1799994B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004049288A DE102004049288A1 (de) 2004-10-09 2004-10-09 Kraftstoffinjektor mit formgeprägtem Ventilsitz zur Reduzierung der Ankerhubdrift
PCT/EP2005/055006 WO2006040277A1 (fr) 2004-10-09 2005-10-05 Injecteur de carburant comportant un siege de soupape estampe destine a reduire la derive de levee d'armature

Publications (2)

Publication Number Publication Date
EP1799994A1 EP1799994A1 (fr) 2007-06-27
EP1799994B1 true EP1799994B1 (fr) 2008-12-31

Family

ID=35385600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804893A Ceased EP1799994B1 (fr) 2004-10-09 2005-10-05 Injecteur de carburant comportant un siege de soupape estampe destine a reduire la derive de levee d'armature

Country Status (6)

Country Link
US (1) US20070261673A1 (fr)
EP (1) EP1799994B1 (fr)
JP (1) JP2008516138A (fr)
CN (1) CN101040115B (fr)
DE (2) DE102004049288A1 (fr)
WO (1) WO2006040277A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004062073B4 (de) * 2004-12-23 2015-08-13 Continental Automotive Gmbh Verfahren und Vorrichtung zur Kompensation von Prelleffekten in einem piezogesteuerten Einspritzsystem einer Verbrennungskraftmaschine
DE102008044096A1 (de) * 2008-11-27 2010-06-02 Robert Bosch Gmbh Verfahren zur Herstellung von Drosselbohrungen mit niedrigem Kaviationsumschlagpunkt
DE102010049022A1 (de) * 2010-10-21 2012-04-26 Kendrion Binder Magnete Gmbh Hochdruckregelventil
DE102012212614A1 (de) * 2012-07-18 2014-01-23 Continental Automotive Gmbh Piezoinjektor mit hydraulisch gekoppelter Düsennadelbewegung
JP6253259B2 (ja) * 2012-09-26 2017-12-27 株式会社デンソー 燃料噴射弁
DE102012222509A1 (de) 2012-12-07 2014-06-12 Continental Automotive Gmbh Piezoinjektor
DE102013220823B3 (de) * 2013-10-15 2015-03-05 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
US9644589B2 (en) * 2013-11-20 2017-05-09 Stanadyne Llc Debris diverter shield for fuel injector
US20160348630A1 (en) * 2015-05-29 2016-12-01 Cummins Inc. Fuel injector
CN106321307B (zh) * 2015-07-03 2020-03-06 罗伯特·博世有限公司 燃油喷射器及其控制阀
CN109839555B (zh) * 2017-11-29 2023-05-02 罗伯特·博世有限公司 用于磨损监测的方法、装置和控制单元以及机器可读介质
TR2022005524A1 (tr) * 2022-04-07 2023-10-23 Bosch Sanayi Ve Ticaret Anonim Sirketi Geli̇şmi̇ş uzun-dönemli̇ sizdirmazlik davranişina sahi̇p bi̇r yakit enjektörü

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492894B1 (fr) * 1980-10-29 1985-06-07 Renault Injecteur a commande electromagnetique a bille
US4639568A (en) * 1984-07-13 1987-01-27 Ex-Cell-O Corporation Apparatus and method for finishing fuel injector spray tips using EDM
US4703142A (en) * 1986-05-01 1987-10-27 Ex-Cell-O Corporation Method of combining grinding and EDM operation for finishing fuel injector nozzle bodies
US4721839A (en) * 1986-05-22 1988-01-26 Ex-Cell-O Corporation Combined bore seat face grinding, EDM and lapping method for finishing fuel injector nozzle bodies
DE4035317C1 (en) * 1990-11-07 1991-10-02 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Spray injection needle valve - has needle fixed in nozzle with edge formed by flats
JP3546508B2 (ja) * 1994-03-25 2004-07-28 株式会社デンソー インジェクターの製造方法及びインジェクタに用いられる可動コアの製造方法
EP0745764B1 (fr) * 1995-06-02 2001-03-21 Ganser-Hydromag Ag Soupape d'injection de combustible pour moteurs à combustion interne
DE19947772A1 (de) * 1999-10-05 2001-04-19 Hermann Golle Einspritzventil, insb. für Common-Rail-Einspritzsysteme
DE10131201A1 (de) * 2001-06-28 2003-01-16 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE10301698A1 (de) * 2003-01-17 2004-08-05 Siemens Ag Ventil und Verfahren zum Herstellen eines Ventils

Also Published As

Publication number Publication date
EP1799994A1 (fr) 2007-06-27
CN101040115A (zh) 2007-09-19
US20070261673A1 (en) 2007-11-15
DE102004049288A1 (de) 2006-04-20
WO2006040277A1 (fr) 2006-04-20
JP2008516138A (ja) 2008-05-15
CN101040115B (zh) 2010-06-16
DE502005006393D1 (de) 2009-02-12

Similar Documents

Publication Publication Date Title
EP2171258B1 (fr) Soupape de commande pour une soupape d'injection de carburant
EP1831537B1 (fr) Injecteur de systeme d'injection de carburant d'un moteur a combustion interne
EP1799994B1 (fr) Injecteur de carburant comportant un siege de soupape estampe destine a reduire la derive de levee d'armature
EP0976924A2 (fr) Servovalve pour un injecteur et injecteur
EP1490592A1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
DE102007042466B3 (de) Einspritzsystem mit reduzierter Schaltleckage und Verfahren zum Herstellen eines Einspritzsystems
DE19937777A1 (de) Direkteinspritzvorrichtung mit Dualströmungsratenzuflußöffnung
EP1335128B1 (fr) Soupape hydraulique à haute pression, notamment pour un dispositif d'injection de carburant d'un moteur
DE10100390A1 (de) Einspritzventil
DE10205185A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1310667B1 (fr) Système d'injection de carburant pour un moteur à combustion
WO2001079688A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
EP2148080A1 (fr) Dispositif de ventilation d'injection de carburant
EP1203150A2 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
EP2798192B1 (fr) Injecteur de carburant pour moteur à combustion
WO2003004861A1 (fr) Injecteur de carburant a soupape de commande a equilibrage des forces
EP2016276B1 (fr) Injecteur de carburant avec un circuit de reflux optimise
DE10059399B4 (de) Vorrichtung zur Verbesserung der Einspritzabfolge bei Kraftstoffeinspritzsystemen
DE102017202305A1 (de) Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil
WO2017211485A1 (fr) Injecteur
WO2011076465A1 (fr) Injecteur de carburant sans fuite
EP1952012A1 (fr) Injecteur
EP1799993A1 (fr) Injecteur de carburant
DE102009029231A1 (de) Kraftstoffinjektor
WO2008148633A1 (fr) Soupape hydraulique pour injecteur de carburant

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20070509

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20071106

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAC Information related to communication of intention to grant a patent modified

Free format text: ORIGINAL CODE: EPIDOSCIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502005006393

Country of ref document: DE

Date of ref document: 20090212

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20091001

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20131022

Year of fee payment: 9

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20141005

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141005

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20171206

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20181022

Year of fee payment: 14

Ref country code: FR

Payment date: 20181023

Year of fee payment: 14

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502005006393

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191005

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191031