EP1012471B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1012471B1
EP1012471B1 EP99906047A EP99906047A EP1012471B1 EP 1012471 B1 EP1012471 B1 EP 1012471B1 EP 99906047 A EP99906047 A EP 99906047A EP 99906047 A EP99906047 A EP 99906047A EP 1012471 B1 EP1012471 B1 EP 1012471B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
swirl
valve seat
valve
seat body
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
EP99906047A
Other languages
German (de)
English (en)
Other versions
EP1012471A1 (fr
Inventor
Martin Müller
Günter DANTES
Jörg HEYSE
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 EP1012471A1 publication Critical patent/EP1012471A1/fr
Application granted granted Critical
Publication of EP1012471B1 publication Critical patent/EP1012471B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1853—Orifice plates
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices

Definitions

  • the invention is based on a fuel injector according to the preamble of claim 1.
  • WO 96/11335 From WO 96/11335 is already a Fuel injector known at its downstream End of a multi-disc atomizing device with one Swirl processing is arranged.
  • This atomizing attachment is downstream of one installed in a valve seat bracket disc-shaped guide element and a valve seat also provided on the valve seat support, a additional support element the atomizing attachment in one holds defined position.
  • the atomizer attachment is executed two-pane or four-pane, the individual disks made of stainless steel or silicon are made. Accordingly come in the manufacture the opening geometries in the disks conventional Machining processes for use, such as eroding, punching or etching. Every single disc of the atomizer attachment is manufactured separately, after which according to the desired Number of discs all discs of the same size to form the complete atomizing attachment stacked on top of each other become.
  • the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that with it a very high atomization quality of a fuel to be sprayed and one to the respective Requirements (e.g. installation conditions, motor configurations, Cylinder formations, spark plug position) adapted, very variably configurable jet or spray shaping is achieved.
  • a very high atomization quality of a fuel to be sprayed and one to the respective Requirements e.g. installation conditions, motor configurations, Cylinder formations, spark plug position
  • the atomizer disc is particularly advantageous manufactured using multilayer electroplating. Because of your The atomizer disks are very metallic shatterproof and easy to assemble and allow through the specific training of their top layer one optimal installation on the fuel injector. The attachment the atomizer disc on the fuel injector in one precisely defined position is particularly simplified.
  • the use of multilayer electroplating allows an extreme great freedom of design because the contours of the Opening areas (inlet areas, inflow areas, Swirl channels, swirl chamber) free in the atomizer disc are selectable. Especially compared to silicon wafers, in which contours that can be achieved due to the crystal axes are strictly specified (truncated pyramids), this is flexible shape very advantageous.
  • Metallic deposition is particularly compared to Manufacturing silicon wafers the advantage of a very great variety of materials.
  • the upstream layer sets one Distance layer on the downstream direction an inflow layer follows the swirl chamber of a lower one Swirl generation layer completely covers.
  • the Swirl generation layer is one or more Material areas formed due to their contours and their geometric position to each other the contours of the Specify swirl chamber and swirl channels.
  • two, three, four or six swirl channels are provided.
  • the material areas can according to the desired contour of the Swirl channels have very different shapes, e.g. web-like or spiral.
  • the contours of the spacer layer and the Swirl chamber can be designed flexibly.
  • the atomizer disc easy attachment between the valve seat body of the Pinch valve and a receiving element.
  • the receiving element is expediently cup-shaped executed and has a revolving Mantle section and a bottom section. During the Bottom portion of the support of the atomizer disc and the Press the atomizer disc against the valve seat body serves, with the jacket section a fixation of the Receiving element on the valve seat body e.g. by means of a Weld seam achieved.
  • FIG. 1 shows it partially shown fuel injector in section with an atomizer disc at the downstream valve end
  • FIG. 2 shows a section along the line II-II in FIG. 1
  • Figure 3 shows a second embodiment of a downstream valve end
  • Figure 4 is a section along the line IV-IV in Figure 3
  • Figure 5 a third Embodiment of a downstream valve end
  • figure 6 shows a fourth exemplary embodiment of a downstream one Valve end
  • Figure 7 is a section along the line VII-VII in Figure 6 and Figure 8, a fifth embodiment of a downstream valve end.
  • Electromagnetically actuated valve in the form of a Injector for fuel injection systems from mixture-compressing, spark-ignition internal combustion engines has one of a magnetic coil 1 at least partially surrounding, serving as the inner pole of a magnetic circuit, tubular, largely hollow cylindrical core 2.
  • the Fuel injector is particularly suitable as High pressure injector for direct injection of Fuel in a combustion chamber of an internal combustion engine.
  • valve housing is at least partially by one elongated, multi-step valve seat body 9 formed in which an axially movable valve part is provided is.
  • This valve part consists of at least one armature 11 and a rod-shaped valve needle 12, which from the Valve seat body 9 is enclosed.
  • the valve needle 12 has this example four spread over their circumference, milled slots 13, which the passage of the flow through the needle guide area along the valve seat body 9 enable.
  • the valve part can also be used as a flat disc integrated anchor.
  • the through opening 14 is at its lower end downstream frustoconical, because the valve seat body 9 is conical in this area Valve seat 15 forms.
  • the valve needle 12 instructs a valve closing section 16 at its downstream end on.
  • This, for example, hemispherical rounded Valve closing section 16 acts in a known manner with the Valve seat 15 together.
  • the swirl disk 30 is e.g. manufactured by means of multilayer electroplating and comprises three metallic layers deposited on one another.
  • the injection valve is actuated, for example in a known manner electromagnetic.
  • the valve needle 12 For axial movement the valve needle 12 and thus to open against the Spring force of a return spring (not shown) or Closing the injector serves the indicated electromagnetic circuit with the magnetic coil 1, the core 2 and the anchor 11.
  • the anchor 11 is with the Valve closing section 16 facing away from the valve needle 12 z. B. connected by a weld and on the core 2nd aligned.
  • a other excitable actuator e.g. a piezostack
  • a comparable fuel injector is used or the actuation of the axially movable valve part by hydraulic pressure or servo pressure.
  • the stroke of the valve needle 12 is i.a. through the Valve seat surface 15 predetermined.
  • a final position of the Valve needle 12 is through when the magnet coil 1 is not energized the system of the valve closing section 16 on the Valve seat 15 set while the other End position of the valve needle 12 when the solenoid coil 1 is excited by the installation of the armature 11 on the downstream End face of the core 2 results.
  • the surfaces of the components are in the latter stop area, for example chrome.
  • the receiving element 18 delimits the downstream end of the Injector in the form of a cap, so that the Valve seat area is well protected. Also takes over the receiving element 18 the function of receiving the Swirl disk 30, which by the receiving element 18 against the lower end face 32 of the valve seat body 9 is pressed.
  • the receiving element 18 is e.g. a sheet metal body with an in Circumferential circumferential jacket section 33 and a actual valve end forming bottom portion 34.
  • Der Jacket section 33 is e.g. by means of a laser generated, circumferential weld 35 firmly with the Valve seat body 9 connected.
  • the swirl disk 30 lies on the inner boundary side of the bottom portion 34.
  • In the bottom portion 34 is a central outlet opening 36 trained who e.g. is introduced by means of punching and through which the now swirling fuel that Fuel injector leaves.
  • FIG 2 shows a section along the line II-II in Figure 1 by an uppermost layer 60 of the swirl disk 30 such a swirl disk 30 is a one-piece component, because the individual layers immediately galvanically deposited on each other and not first be added later. The next shift connects due to galvanic adhesion with the respective underlying layer.
  • the swirl disk 30 is formed here from three galvanically layers, layers or layers that are separated from one another thus directly in the flow direction when installed follow each other.
  • the three layers of the Swirl disk 30 in the following according to their function Spacer layer 60, inflow layer 61 and Swirl generation layer 62.
  • the spacer layer 60 is made from several material areas 60 ', e.g. like a segment of a circle and spaced from each other are executed.
  • the material areas 60 ' serve Setting the distance between the actually essential atomizing layers of the swirl disk 30 and End face 32 of the valve seat body 9.
  • the material areas 60 ' are in a way "spacer knobs".
  • the middle inflow layer 61 has, for example slightly larger outside diameter than the top layer 60, the inflow layer 61 being so large in diameter can be carried out that they are dimensionally accurate in the jacket section 33 can be fitted and slipping of the swirl disc 30 is excluded.
  • the fuel reaches the outside unhindered Inlet regions 68 of the swirl generation layer 62, which adjoin connect several swirl channels, not shown, which in turn tangentially into a central one, from the inflow layer 61 to Open swirl chamber 69 covered above.
  • the Swirl generation layer 62 is a complex opening contour provided over the entire axial thickness of this layer 62 runs. Due to the tangential confluence of the The fuel receives swirl channels in the swirl chamber 69 imprinted an angular momentum that also in the Outlet opening 36 of the bottom portion 34 is maintained.
  • the Contours of the swirl chamber 69 and the swirl channels are of correspondingly deposited material areas 62 'of Swirl generation layer 62 predetermined.
  • the material areas 62 ' can e.g. web-like, spiral, paddle wheel-shaped or be formed in a similar manner.
  • the starting point for the process is a flat and stable one Carrier plate, the z. B. made of metal (titanium, steel), silicon, Glass or ceramic can exist.
  • the carrier plate optionally at least one auxiliary layer applied first.
  • a Electroplating start layer e.g. TiCuTi, CrCuCr, Ni
  • the application of the auxiliary layer happens z. B. by Sputtering or by electroless metal deposition.
  • Pretreatment of the carrier plate is carried out on the auxiliary layer Photoresist applied over the entire surface, e.g. rolled on or spun on.
  • the thickness of the photoresist should be the thickness of the Metal layer correspond to that in the later one Electroplating process is to be realized, i.e. the thickness of the lower swirl generation layer 62 of the swirl disk 30.
  • Die Resist layer can consist of one or more layers photostructurable film or a liquid resist (Polyimide, photoresist) exist. If optional one Sacrificial layer in the lacquer structures created later is to be galvanized, the thickness of the photoresist is around to increase the thickness of the sacrificial layer.
  • the too Realizing metal structure should be with the help of a photolithographic mask inversely in the photoresist be transmitted.
  • One way is to Photoresist directly over the mask using UV exposure (PCB imagesetter or semiconductor imagesetter) expose (UV depth lithography> and subsequently to develop.
  • the negative structure ultimately created in the photoresist Later layer 62 of the swirl disk 30 is also galvanically Metal (e.g. Ni, NiCo, NiFe, NiW, Cu) filled up (Metal deposition).
  • the metal goes through it Electroplate closely to the contour of the negative structure, so that the given contours reproduce true to form in it become.
  • the steps from the optional application of the Auxiliary layer according to the number of desired Layers are repeated so that at one three-layer swirl disk 30 three electroplating steps be made.
  • different metals can also be used however, it can only be used in a new electroplating step are.
  • FIGS. 3 to 8 show further exemplary embodiments of the Valve ends designed according to the invention with swirl disks 30 shown, the basic structure of the correspond downstream valve end in Figure 1.
  • the Embodiments of the following figures are the compared to the embodiment shown in Figure 1 constant or equivalent parts through the identified by the same reference numerals and no longer in detail explained. It will only look at differences below and special features.
  • FIG Swirl disk 30 at least partially in a centering ring 75 used.
  • the centering ring 75 on the lower end face 32 of the valve seat body 9.
  • Centering ring 75 is an inner circular opening 76 provided, in which the swirl disk 30 with its middle Layer 61 is fitted exactly.
  • Layer 61 is with the same outside diameter as the inside diameter of the Opening 76 is formed and provides a continuous Metal layer without opening areas. Instead are in the centering ring 75 starting from the opening 76 via the Scope formed several bulges 78, one Inflow of the fuel to the swirl generation layer 62 to guarantee.
  • the section in Figure 3 is chosen so that the Swirl channels 70 of the swirl generation layer 62 can be seen.
  • the section shown in Figure 4 along the line IV-IV 3 shows a further embodiment of the valve needle 12 clarify.
  • a guide section 80 is provided during a first tour of the axially movable valve part with the armature 11.
  • the Guide portion 80 is, for example, in the form of a Triangular formed, the three edge areas one have a certain areal extension and therefore three easily curved guide surfaces 81 for guiding the valve needle 12 represent.
  • Spray off longitudinal valve axis 8 at an inclined spray for example due to certain installation conditions immediately on Combustion chamber injectors are an advantage Spray off longitudinal valve axis 8 at an inclined spray. there e.g. a twisty, if possible rotationally symmetrical hollow cone spray with a Uniform distribution over the hollow cone circumference can be generated.
  • FIG. 5 A possible design variant is in FIG. 5 shown, in which in the bottom portion 34 of the Receiving element 18 obliquely to the valve longitudinal axis 8 extending outlet opening 36 is introduced.
  • the Outlet 36 begins e.g. on the inner Limiting side and contact surface of the swirl disk 30 middle and ends at the lower front of the Receiving element off-center, the inclination of the Outlet opening 36 to the spray angle of the entire spray Valve longitudinal axis 8 determined.
  • the beam alignment is with an arrow and y, where y is the angle of the Sprays to the valve longitudinal axis 8 indicates.
  • the inner Boundary side of the bottom portion 34 a slight Recess 83 is provided, which e.g. can be produced by embossing is.
  • the recess 83 is of such a diameter executed that the swirl disk 30 with its lower Swirl generation layer 62 and specifically the material areas 62 'can be used accurately.
  • the recess 83 guarantees a centering of the swirl disk 30, so that on Centering rings ( Figure 3) or a centering Inflow layer 61 with flow openings 67 (FIG. 1) can be dispensed with.
  • Indentation 84 is provided on the valve seat body 9.
  • the Indentation 84 is on the lower end face 32 of the Valve seat body 9 formed with such Depth towards the valve seat surface 15 so that the swirl disk 30 completely disappears in it when installed, so that the depth of the recess 84 is at least the axial Height or thickness of the swirl disk 30 corresponds.
  • the Bottom portion 34 of the receiving element 18 nestles for example, directly on the end face 32.
  • the Swirl disk 30 is e.g. ultimately both on that Bottom portion 34 and a bottom 85 of the Well 84.
  • FIG Swirl disk 30 directly in the receiving element 18 integrated.
  • the cup-shaped, e.g. by deep drawing moldable receiving element 18 made of sheet metal has in its Bottom portion 34 instead of the outlet opening 36 a larger one Bore 87 for receiving the swirl disk 30.
  • Die Swirl disk 30 is again made of three layers, but now without an upper spacer an upper cover layer 61a, with a middle one Swirl generation layer 62 and with a lower bottom layer 63.
  • the bottom layer 63 is in the bottom portion 34 of the Receiving element 18 inserted and on this, for example attached with an annular circumferential weld 88.
  • the weld seam 88 is not exposed to high loads, since the swirl disc 30 when the Internal valve pressure due to their larger upper Layers 61a and 62 on the inner boundary side of the Base section 34 supports.
  • the outlet opening 36 of the valve is through the Outlet opening of the bottom layer 63 of the swirl disk 30 immediately formed.
  • swirl disks 30 are others Types of atomizer disks, such as one Offset of inlet and outlet and thus one so-called S-impact generating discs, which are metallic as Multilayer electroplating disks can be made used.

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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 (10)

  1. Soupape d'injection de carburant pour une installation d'injection de carburant d'un moteur à combustion interne, notamment pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne comprenant
    un axe longitudinal (8),
    un actionneur (1, 2, 11) pour actionner une partie mobile (12) de la soupape pour ouvrir et fermer la soupape en coopérant avec un siège de soupape fixe (15) réalisé sur un corps de siège de soupape (9) et ayant une plaquette de pulverisation (30) à plusieurs couches placée en aval du siège de soupape (15),
    caractérisée en ce qu'
    une couche (60) supérieure de la plaquette de pulvérisation (30) tournée vers le corps formant siège de soupape (9) comporte plusieurs zones de matière (60') qui viennent contre une surface frontale inférieure (32) du corps formant siège de soupape (9),
    les zones de matière (60') sont séparées par des structures d'ouverture (65, 66) qui passent au moins en partie radialement dans la couche supérieure (60) et
    toutes les couches (60, 61, 62) de la plaquette de pulvérisation (30) sont réalisées par dépôt galvanique de métal, accrochées directement les unes aux autres.
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    la plaquette de pulvérisation est une plaquette de rotation (30) comportant une chambre de rotation (69) et aumoins deux canaux de rotation (70) débouchant dans la chambre.
  3. Soupape d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    la plaquette de pulvérisation (30) s'applique par sa couche (62) inférieure, à l'opposé du corps formant siège de soupape (9) contre un élément de réception (18).
  4. Soupape d'injection de carburant selon la revendication 3,
    caractérisée en ce que
    l'élément de réception (18) est en forme de gobelet avec un segment enveloppe (33) périphérique et un segment de fond (34) et la couche inférieure (62) s'appuie contre le côte ide limitation intérieur du segment de fond (34).
  5. Soupape d'injection de carburant selon la revendication 4,
    caractérisée en ce que
    la plaquette de pulvérisation (30) est serrée entre le corps formant siège de soupape (9) et le segment de fond (34) de l'élément de réception (18).
  6. Soupape d'injection de carburant selon la revendication 4 ou 5,
    caractérisée en ce que
    l'une (61) des couches, est réalisée pour servir au centrage de la plaquette de pulvérisation (30) dans le segment enveloppe (33) de l'élément de réception (18).
  7. Soupape d'injection de carburant selon l'une des revendications 4 à 6,
    caractérisée en ce que
    le segment enveloppe (33) est relié solidairement au corps formant siège de soupape (9) par un cordon de soudure (35).
  8. Soupape d'injection de carburant selon l'une des revendications 1 à 5,
    caractérisée en ce que
    la plaquette de pulvérisation (30) est prévue dans une cavité (84) de la surface frontale inférieure (32) du corps formant siège de soupape (9).
  9. Soupape d'injection de carburant selon les revendications 4 ou 5,
    caractérisée en ce que
    le disque de pulvérisation (30) est prévu au niveau du côté limite intérieur du segment de fond (34) dans une cavité (83) de l'élément de réception (18).
  10. Soupape d'injection de carburant selon.les revendications 4 ou 5,
    caractérisée par
    un orifice de sortie (36) prévu dans le segment de fond (34), cet orifice étant d'axe parallèle au incliné d'un angle γ par rapport à l'axe longitudinal (8) de la soupape.
EP99906047A 1998-04-08 1999-01-14 Soupape d'injection de carburant Expired - Lifetime EP1012471B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19815781 1998-04-08
DE19815781A DE19815781A1 (de) 1998-04-08 1998-04-08 Brennstoffeinspritzventil
PCT/DE1999/000049 WO1999053192A1 (fr) 1998-04-08 1999-01-14 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1012471A1 EP1012471A1 (fr) 2000-06-28
EP1012471B1 true EP1012471B1 (fr) 2003-10-08

Family

ID=7864017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99906047A Expired - Lifetime EP1012471B1 (fr) 1998-04-08 1999-01-14 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US6170764B1 (fr)
EP (1) EP1012471B1 (fr)
JP (1) JP2002503310A (fr)
DE (2) DE19815781A1 (fr)
WO (1) WO1999053192A1 (fr)

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DE60021372T2 (de) * 1999-04-27 2006-01-12 Siemens Vdo Automotive Corporation, Auburn Hills Verfahren zur herstellung eines brennstoffeinspritzventilsitzes
DE19947780A1 (de) * 1999-10-02 2001-04-12 Bosch Gmbh Robert Verfahren zum Einstellen der Strömungsmenge an einem Brennstoffeinspritzventil
US6533954B2 (en) * 2000-02-28 2003-03-18 Parker-Hannifin Corporation Integrated fluid injection air mixing system
US6523758B1 (en) * 2000-03-02 2003-02-25 Siemens Automotive Corporation Fuel injector needle lower guide disk
US6742727B1 (en) * 2000-05-10 2004-06-01 Siemens Automotive Corporation Injection valve with single disc turbulence generation
DE10041440A1 (de) * 2000-08-23 2002-03-07 Bosch Gmbh Robert Drallscheibe und Brennstoffeinspritzventil mit Drallscheibe
DE10059009A1 (de) * 2000-11-28 2002-05-29 Bosch Gmbh Robert Brennstoffeinspritzanlage
JP4296519B2 (ja) * 2006-12-19 2009-07-15 株式会社日立製作所 燃料噴射弁
US10047713B2 (en) * 2013-11-11 2018-08-14 Enplas Corporation Attachment structure of fuel injection device nozzle plate
DE102018203065A1 (de) * 2018-03-01 2019-09-05 Robert Bosch Gmbh Verfahren zur Herstellung eines Injektors

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Publication number Priority date Publication date Assignee Title
US4040396A (en) 1974-03-28 1977-08-09 Diesel Kiki Co., Ltd. Fuel injection valve for internal combustion engine
DE3943005A1 (de) 1988-12-28 1990-07-05 Hitachi Ltd Elektromagnetische einspritzventilvorrichtung
US5484108A (en) * 1994-03-31 1996-01-16 Siemens Automotive L.P. Fuel injector having novel multiple orifice disk members
US5570841A (en) 1994-10-07 1996-11-05 Siemens Automotive Corporation Multiple disk swirl atomizer for fuel injector
US5685491A (en) * 1995-01-11 1997-11-11 Amtx, Inc. Electroformed multilayer spray director and a process for the preparation thereof
WO1996030644A1 (fr) * 1995-03-29 1996-10-03 Robert Bosch Gmbh Disque perfore, notamment pour soupapes d'injection, et son procede de fabrication
DE19607266A1 (de) * 1995-03-29 1996-10-02 Bosch Gmbh Robert Lochscheibe, insbesondere für Einspritzventile und Verfahren zur Herstellung einer Lochscheibe
JP3579426B2 (ja) * 1995-03-29 2004-10-20 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 孔付き円板を製造するための方法
EP0787254B1 (fr) * 1995-03-29 2002-06-12 Robert Bosch Gmbh Disque perfore, notamment pour soupapes injectrices
DE19527846A1 (de) * 1995-07-29 1997-01-30 Bosch Gmbh Robert Ventil, insbesondere Brennstoffeinspritzventil
DE19639506A1 (de) * 1996-09-26 1998-04-02 Bosch Gmbh Robert Lochscheibe und Ventil mit einer Lochscheibe

Also Published As

Publication number Publication date
WO1999053192A1 (fr) 1999-10-21
DE59907278D1 (de) 2003-11-13
EP1012471A1 (fr) 2000-06-28
DE19815781A1 (de) 1999-10-14
JP2002503310A (ja) 2002-01-29
US6170764B1 (en) 2001-01-09

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