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EP1322858A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1322858A1
EP1322858A1 EP01967027A EP01967027A EP1322858A1 EP 1322858 A1 EP1322858 A1 EP 1322858A1 EP 01967027 A EP01967027 A EP 01967027A EP 01967027 A EP01967027 A EP 01967027A EP 1322858 A1 EP1322858 A1 EP 1322858A1
Authority
EP
European Patent Office
Prior art keywords
fuel
swirl
fuel injection
injection valve
valve according
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.)
Withdrawn
Application number
EP01967027A
Other languages
German (de)
English (en)
Inventor
Guenter Dantes
Detlef Nowak
Matthias Waldau
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 EP1322858A1 publication Critical patent/EP1322858A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F02M61/188—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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • 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
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injector which is characterized in that a guide and seat area is provided at the downstream end of the valve, which is formed by three disc-shaped elements.
  • a swirl element is embedded between a guide element and a valve seat element.
  • the guide element serves to guide an axially movable valve needle projecting through it, while a valve closing section of the valve needle interacts with a valve seat surface of the valve seat element.
  • the swirl element has an inner opening region with a plurality of swirl channels which do not communicate with the outer circumference of the swirl element in connection. The entire opening area extends completely over the axial thickness of the swirl element.
  • a fuel injector which is characterized in that it has a swirl disk downstream of a valve seat, which consists of at least one metallic Material consists of at least two swirl channels opening into a swirl chamber and in which all layers are directly adhered to one another by means of galvanic metal deposition (multilayer electroplating).
  • the swirl disk is installed in the valve such that its surface normal is inclined at an angle to the longitudinal axis of the valve which deviates from 0 °, so that a jet angle ⁇ to the longitudinal axis of the valve is achieved by the alignment of the swirl disk.
  • a disadvantage of the fuel injection valves known from the above-mentioned documents is, in particular, the high manufacturing and thus the cost.
  • complex manufacturing measures have to be taken.
  • the beam angles ⁇ and ⁇ cannot be realized with common swirl preparation methods.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a swirl disk is easy to manufacture from individual swirl elements and can be used in any standard fuel injector. 'The number of swirl elements as well as the overlapping Brennstoff penbowitch formed through which fuel channels which give the fuel a swirl, there are arbitrary and can be adapted to the claims, the fuel injection valve in a simple manner in accordance with.
  • An inclination of the longitudinal axis of the valve seat body with respect to the longitudinal axis of the fuel injector is also advantageous for use in the case of oblique injection.
  • a swirl chamber is formed on the outlet side of the swirl disk, which is dimensioned such that a homogeneous swirl flow can form therein.
  • the arrangement of the swirl disk in an insert that can be inserted into the valve seat body is advantageous because the insert and the recess receiving the insert are easy to produce.
  • FIG. 1 shows a schematic section through a first exemplary embodiment of a fuel injector according to the invention
  • FIG. 2A shows a schematic section from the first exemplary embodiment of the fuel injector according to the invention shown in FIG. 1 in area II in FIG. 1,
  • FIG. 2B is a schematic plan view of the swirl disk in FIG. 2A in the outflow direction
  • FIG. 3A shows a schematic section from a second exemplary embodiment of the fuel injector according to the invention in area II in FIG. 1, and Fig. 3B is a schematic plan view of the swirl disk in Fig. 3A in the outflow direction.
  • a fuel injector 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited
  • the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • the valve seat body 5 can be inserted into a recess 50 of the nozzle body 2.
  • fuel injector 1 is a fuel injector 1 that opens inward and has a spray opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic coil 10.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheath 18, which may be molded onto the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting washer 15 is used for stroke adjustment on the other side of the adjusting disk 15 there is an armature 20.
  • This is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the first flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
  • Fuel channels 30a and 30b run in the valve needle guide 14 and in the armature 20, which channels the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the spray opening 7.
  • the fuel injector 1 is sealed by a seal 28 'against a fuel line, not shown.
  • a swirl disk 34 is arranged on the inlet side of the valve seat body 5, which is formed in the present first exemplary embodiment from four swirl elements 36a to 36d.
  • the swirl elements 36 are welded to one another and to the valve seat body 5.
  • the valve needle 3 passes through the swirl disk 34 and is guided by a cardanic valve needle guide 46 to avoid center misalignments and canting.
  • the swirl elements 36 of the swirl disk 34 have fuel feedthroughs 35a to 35d which overlap to form fuel channels 37 which pull the swirl disk 34 through.
  • a detailed illustration of the drain elements 36 can be seen in FIGS. 2 and 3.
  • the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20.
  • the armature 20 also carries the flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the standing with the valve needle 3 is in operative connection valve-closure member 4 lifts off from valve seat surface 6 and on 'the fuel channels 30a and 30b and formed in the swirl plate 34.
  • Fuel channels 37 led to the ejection opening 7 fuel is discharged. This is preferably inclined at a spray angle ⁇ with respect to a longitudinal axis 45 of the fuel injection valve 1.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the flange 21 which is operatively connected to the valve needle 3 moves counter to the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, as a result of which the valve-closure member 4 is seated on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • FIG. 2A shows an enlarged sectional view of an enlarged view of the spray-side part of the first exemplary embodiment of a fuel injector according to the invention described in FIG. 1.
  • the section shown is designated II in FIG. 1.
  • the swirl disk 34 which is constructed from four swirl elements 36 in the present exemplary embodiment, is inserted into a central recess 47 of the fuel injection valve 1 and rests on the valve seat body 5.
  • the four swirl elements 36 are preferably welded or soldered to one another and to the valve seat body 5.
  • the swirl elements 36 can also be formed in multiple layers by means of galvanic processes.
  • the four swirl elements 36 each have an equal number of fuel feedthroughs 35.
  • the fuel feedthroughs 35 can be eroded, punched out, etched, drilled or produced by similar processes.
  • the fuel feedthroughs 35 are arranged offset from one another, so that they at least partially overlap one another.
  • the displacements of the individual swirl elements 36 must take place in the same direction.
  • the fuel feedthroughs must have an axial offset in order to generate a swirl, but can additionally also have a radial offset component.
  • the swirl disk 34 can be connected to the nozzle body 2 or to the valve seat body 5 by soldering, welding, or also by caulking, pressing in or similar methods.
  • the cross section of the fuel feedthroughs 35 can, as in the present exemplary embodiment, have a square shape with rounded corners. However, as shown in Fig. 2B, it can take any other form.
  • the fuel feedthroughs 35 can have a round or elongated cross section. Rounded shapes also have the advantage of a streamlined shape.
  • the sealing seat of the fuel injector ' 1 is designed in a conventional manner, the valve closing body 4 is formed on the valve needle 3 and extends through the swirl disk 34. In this way, the swirl disk 34 also forms a valve needle guide in the area of the sealing seat.
  • the valve closing body 4 interacts with the valve seat surface 6, which is formed on the valve seat body 5.
  • a swirl chamber 40 is formed on the inflow side of the valve seat surface 6 and is delimited by the valve seat body 5, the valve closing body 4 and the swirl disk 34.
  • the volume of the swirl chamber 40 is at best dimensioned such that a stable swirl flow which is homogeneous in a circumferential direction can form in the swirl chamber 40, the dead volume being kept as low as possible.
  • FIG. 2B shows a top view of the swirl disk 34 of the first exemplary embodiment of the fuel injector 1 according to the invention shown in FIG. 2A in the outflow direction.
  • the view shows the swirl element 36a on the inlet side, the four square, rounded fuel feedthroughs 35a of which are represented by a solid line in the present exemplary embodiment.
  • the fuel bushings 35b of the second swirl element 36b on the spray side are partially visible through the fuel bushings 35a of the first swirl element 36a.
  • the fuel feedthroughs 35b are again shown in solid lines in the FIGS hidden areas, however, dashed.
  • the fuel bushings 35c formed in the subsequent third swirl element 36c are almost no longer visible through the fuel bushings 35a of the swirl element 36a, since the fuel bushings 35a to 35c each overlap by approximately 50%.
  • the fuel bushings 35d of the fourth swirl element 36d are no longer visible through the fuel bushings 35a of the first swirl element 36a.
  • the swirl cheibe '34 also serves as a cardanic valve needle guide 46 for the valve closing body 4, the swirl elements 36 are annular with a central recess 48 in which the valve-closure member 4 is guided.
  • the cardanic valve needle guide 46 compensates for guide errors due to manufacturing inaccuracies in the upstream region of the fuel injector 1, since the valve closing body 4 is almost spherical and can therefore compensate for offsets in several degrees of freedom.
  • the valve needle 3 can be made, for example, in two parts from a ball as the valve closing body 4 and a shaft as the valve needle 3.
  • one-piece solutions as in the present exemplary embodiment with a correspondingly designed valve closing body 4 can also be used advantageously.
  • FIG. 3A shows. in the same representation as FIG. 2A, a second exemplary embodiment of the fuel injection valve 1 designed according to the invention. Corresponding components are provided with the same reference numerals.
  • the swirl disk 36 is arranged on the downstream side of the sealing seat.
  • the fuel injector 1 is designed as an oblique fuel injector 1, whereby a spray angle ⁇ can be set better than by an inclination of the spray opening 7.
  • a longitudinal axis 44 of a spray unit ' receiving the swirl disk 34 is inclined with respect to the longitudinal axis 45 of the fuel injection valve 1.
  • the longitudinal axis 44 of the spray unit 49 can, however, also coincide with the longitudinal axis 45 of the fuel injector 1, the spray angle ⁇ then again having to be achieved by an inclination of the spray opening 7, as in the exemplary embodiment shown in FIG. 2A.
  • the valve seat body 5 likewise has a cardanic valve needle guide 46 in order to counteract tilting and center offsets of the valve needle 3 by means of a spherical guide.
  • the valve closing body 4 is provided with at least one bevel 47 in the region of the cardanic valve needle guide 46.
  • the valve seat body 5 On the outflow side of the sealing seat, which is designed as in the first exemplary embodiment, the valve seat body 5 has a preferably cylindrical recess 43, into which an insert 41 can be inserted.
  • the insert 41 also has a cylindrical shape.
  • the swirl disk 34 which in the present exemplary embodiment has three swirl elements 36, is arranged in a recess 42 of the insert 41.
  • the swirl chamber 40 On the outflow side of the swirl disk 34, the swirl chamber 40 is formed, into which the fuel channels 37 formed from the overlapping fuel passages 35 of the swirl elements 36 open.
  • the swirl chamber 40 merges into the spray opening 7.
  • the swirl disk 34 has three swirl elements 36a to 36c and four fuel bushings 35 per swirl element 36. Due to the arrangement of the swirl disk 34 on the outflow side of the sealing seat, the swirl elements 36 are welded with each other or with the insert 41 is not absolutely necessary since the swirl elements 36 are always loaded in the outflow direction by the fuel pressure and therefore cannot shift against the flow direction. As a result, the modular structure of the fuel injection valve 1 can be further simplified. Nonetheless, gluing or welding the swirl elements 36 to one another or a one-piece galvanic production of the swirl disk 34 is advantageous so that the position of the fuel feedthroughs 35 can no longer change relative to one another after assembly, as a result of which the swirl effect and the fuel flow would be restricted.
  • FIG. 3B shows a top view of the swirl disk of the second exemplary embodiment of the fuel injector 1 according to the invention shown in FIG. 3A in the outflow direction.
  • the view shows the swirl element 36a on the inlet side, the square, rounded fuel feedthroughs 35a of which are represented by a solid line.
  • the fuel bushings 35b of the second swirl element 36b, which is closest on the spray side, are partially visible through the fuel bushings 35a of the first swirl element 36a.
  • the fuel feedthroughs 35b are again shown with solid lines, in contrast, in the hidden areas, with dashed lines.
  • the fuel bushings 35c formed in the subsequent third swirl element 36c are only in a very small area due to the fuel bushings 35a of the swirl element 36a visible since the fuel feedthroughs 35a to 35c each overlap by about 50%. Since the swirl elements 36 are not penetrated by the valve closing body 4 in the present embodiment, they are disc-shaped without a central recess 48.
  • the number of fuel feedthroughs 35 per swirl element 36 is mainly limited by the size of their cross section, i. H.
  • the invention is not limited to the illustrated embodiments and z. B. can also be used for fuel injection valves 1 with a larger number of swirl elements 36 or arbitrarily shaped, larger or smaller fuel feedthroughs 35 in any number and for any designs of fuel injection valves 1.

Landscapes

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

Abstract

L'invention concerne une soupape d'injection de carburant (1), servant notamment à l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne. Cette soupape d'injection comprend un corps de fermeture de soupape (4) qui forme conjointement avec une surface de siège de soupape (6) formée sur un corps de siège de soupape (5), un siège d'étanchéité. Ladite soupape d'injection comprend également un disque à tourbillon (34) comportant des passages pour le carburant (35). Ledit disque à tourbillon (34) se compose de plusieurs éléments à tourbillon (36) qui présentent dans chaque cas le même nombre de passages pour le carburant (35). Les éléments à tourbillon (36) sont disposés de manière décalée les uns par rapport aux autres, de sorte que les passages pour le carburant (35) se chevauchent au moins en partie.
EP01967027A 2000-09-19 2001-08-25 Soupape d'injection de carburant Withdrawn EP1322858A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10046306A DE10046306A1 (de) 2000-09-19 2000-09-19 Brennstoffeinspritzventil
PCT/DE2001/003259 WO2002025100A1 (fr) 2000-09-19 2001-08-25 Soupape d'injection de carburant
DE10046306 2002-09-19

Publications (1)

Publication Number Publication Date
EP1322858A1 true EP1322858A1 (fr) 2003-07-02

Family

ID=7656765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01967027A Withdrawn EP1322858A1 (fr) 2000-09-19 2001-08-25 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6811097B2 (fr)
EP (1) EP1322858A1 (fr)
JP (1) JP2004509284A (fr)
KR (1) KR20020053868A (fr)
CZ (1) CZ20021734A3 (fr)
DE (1) DE10046306A1 (fr)
WO (1) WO2002025100A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10255375A1 (de) * 2002-11-27 2004-06-24 Siemens Ag Einspritzvorrichtung zum Einspritzen von Kraftstoff
US6959699B2 (en) * 2003-11-03 2005-11-01 Caterpillar Inc Injection of fuel vapor and air mixture into an engine cylinder
DE10358726B4 (de) * 2003-12-15 2020-02-06 Robert Bosch Gmbh Brennstoffeinspritzventil
US7762235B2 (en) 2004-03-04 2010-07-27 Continental Automotive Systems Us, Inc. Acoustic noise reduction of a gaseous fuel injector
JP2006017101A (ja) * 2004-06-02 2006-01-19 Denso Corp 燃料噴射弁
US20060200988A1 (en) * 2005-03-11 2006-09-14 Siemens Vdo Automotive Corporation Sandwich orifice disc
DE102005023793B4 (de) * 2005-05-19 2012-01-12 Ulrich Schmid Vorrichtung zur Drallerzeugung in einem Kraftstoffeinspritzventil
US20080006713A1 (en) * 2006-07-06 2008-01-10 Parish James R Fuel injector having an internally mounted cross-flow nozzle for enhanced compressed natural gas jet spray
JP2014156794A (ja) * 2013-02-14 2014-08-28 Toyota Motor Corp 燃料噴射弁
US10262780B2 (en) 2014-05-12 2019-04-16 Flir Detection, Inc. Analytical instrument inductors and methods for manufacturing same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607288A1 (de) * 1995-03-29 1996-10-02 Bosch Gmbh Robert Verfahren zur Herstellung einer Lochscheibe
DE19911931A1 (de) * 1998-03-19 1999-09-23 Denso Corp Brennstoffeinspritzventil
DE19815789A1 (de) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

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Publication number Priority date Publication date Assignee Title
US4923169A (en) 1987-12-23 1990-05-08 Siemens-Bendix Automotive Electronics L.P. Multi-stream thin edge orifice disks for valves
DE4025945C2 (de) 1990-08-16 1998-10-08 Bosch Gmbh Robert Verfahren zur Einstellung eines Brennstoffeinspritzventils und Brennstoffeinspritzventil
DE19736682A1 (de) 1997-08-22 1999-02-25 Bosch Gmbh Robert Brennstoffeinspritzventil
US5996912A (en) * 1997-12-23 1999-12-07 Siemens Automotive Corporation Flat needle for pressurized swirl fuel injector
DE19815800A1 (de) 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil
US6168098B1 (en) * 1999-06-09 2001-01-02 Siemens Automotive Corporation Fuel injector with tubular lower needle guide
JP2003254190A (ja) * 2002-03-04 2003-09-10 Aisan Ind Co Ltd オリフィスプレート

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607288A1 (de) * 1995-03-29 1996-10-02 Bosch Gmbh Robert Verfahren zur Herstellung einer Lochscheibe
DE19911931A1 (de) * 1998-03-19 1999-09-23 Denso Corp Brennstoffeinspritzventil
DE19815789A1 (de) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0225100A1 *

Also Published As

Publication number Publication date
KR20020053868A (ko) 2002-07-05
DE10046306A1 (de) 2002-04-04
WO2002025100A1 (fr) 2002-03-28
US20030173424A1 (en) 2003-09-18
JP2004509284A (ja) 2004-03-25
US6811097B2 (en) 2004-11-02
CZ20021734A3 (cs) 2003-11-12

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Legal Events

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