EP1309789A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1309789A1
EP1309789A1 EP01955273A EP01955273A EP1309789A1 EP 1309789 A1 EP1309789 A1 EP 1309789A1 EP 01955273 A EP01955273 A EP 01955273A EP 01955273 A EP01955273 A EP 01955273A EP 1309789 A1 EP1309789 A1 EP 1309789A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
valve needle
injection valve
flange
valve
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.)
Granted
Application number
EP01955273A
Other languages
German (de)
English (en)
Other versions
EP1309789B1 (fr
Inventor
Klaus Noller
Uwe Liskow
Martin Buehner
Guido Pilgram
Juergen Maier
Hartmut Albrodt
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 EP1309789A1 publication Critical patent/EP1309789A1/fr
Application granted granted Critical
Publication of EP1309789B1 publication Critical patent/EP1309789B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a fuel injector is provided with a solenoid which interacts with an armature which is non-positively connected to the valve needle.
  • An additional mass is provided in a cylindrical shape around the armature and the valve needle, which is connected to the armature via an elastomer layer.
  • a disadvantage here is the complex design with an additional component.
  • the large-area elastomer ring is also unfavorable for the course of the magnetic field and makes it difficult to close the field lines and thus to achieve high tightening forces during the opening movement of the fuel injector.
  • a further cylindrical mass is provided for damping and debouncing around the armature and the valve needle, which is movably clamped and held in position by two elastomer rings. When the valve needle strikes the sealing seat, this second mass can move relative to the armature and valve needle and prevent the valve needle from bouncing.
  • a disadvantage of the described embodiment is the additional effort and space requirement.
  • the armature itself is not decoupled, so its impulse increases the tendency for the valve needle to bounce.
  • the anchor is held between two stops, with an elasto ring between the anchor and the lower stop.
  • the problem arises that a bore through the armature is necessary to supply the fuel to the valve seat surface.
  • the armature is drilled near the valve needle.
  • Damping element enclosed internal volume and a central recess of the fuel injector allows. Liquid compensation creates additional damping based on the shock absorber principle.
  • the damping element is also supported by the intermediate rings, whereby vibrations of the elastomer are avoided.
  • the drainage holes in the flange are easy to manufacture and drain the fuel between the damping element and valve needle quickly and without turbulence.
  • the intermediate rings advantageously have grooves which extend radially from the inside out, for. B. in the form of an embossed structure, whereby the fuel can also be derived on the bottom and top of the damping element. This on the one hand prevents overpressure and the lateral slipping of the damping element, and on the other hand achieves a positive effect on the bouncing behavior of the armature and valve needle, since the viscosity of the fuel increases the damping and thus counteracts bouncing.
  • the drainage of the gap between the valve needle and armature can be achieved particularly easily by segment welding, in that the valve needle is not connected to the flange by a continuous weld seam, but by spot welding, which alternates fastening sections with passages through which fuel can flow.
  • the combination of the individual drainage devices is particularly advantageous in that, for example, the flange is connected to the valve needle by segment welding and the damping element has an intermediate ring on the inlet and outlet sides.
  • FIG. 1 shows a schematic section through an exemplary embodiment of a fuel injector according to the prior art
  • FIG. 2A shows a schematic longitudinal section through a fuel injector according to the invention in the area IIA in FIG. 1
  • Fig. 2B is a schematic section along the line IIB-IIB in Fig. 2A
  • FIG. 3 shows a schematic longitudinal section " through a further exemplary embodiment of a fuel injection valve according to the invention in the area IIA in FIG. 1.
  • the fuel injection valve 1 is in the form of a fuel injection valve for fuel injection systems of mixture-compressing, spark-ignited
  • 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 the valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • 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 solenoid 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 outer pole 9 are separated from one another by a constriction 26 and connected to one another by a non-ferromagnetic 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 can be molded onto the inner pole 13.
  • the valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disc 15 is used for stroke adjustment.
  • the armature 20 is located on the other side of the adjusting disc 15. This armature 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, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and on the valve seat body 5, which channels the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the spray-discharge opening 7.
  • the fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
  • An annular damping element 32 which consists of an elastomer material, is arranged on the spray-side side of the armature 20. It is' on to a second flange 31, which is frictionally connected by a weld 33 to the valve needle.
  • the first flange 21 is welded to the valve needle 3
  • the armature 20 and the damping element 32 are plugged on, and then the second flange 31 is pressed under pressure on the damping element 32 and also welded to the valve needle 3.
  • the armature 20 has only a slight, highly damped play between the first flange 21 and the damping element 32.
  • the armature 20 In the idle state of the fuel injection valve 1, 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 takes the first flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the valve closing body 4, which is connected to the valve needle 3, lifts off the valve seat surface 6 and the fuel which is conducted via the fuel channels 30a to 30c is sprayed off through the spray opening 7.
  • 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 first flange 21, which is 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 area IIA in FIG. 1.
  • valve needle 3 A part of the valve needle 3 is shown, the second flange 31 welded to it and the lower part of the armature 20 with the fuel channel 30a running therein.
  • the damping element 32 rests on the second flange 31.
  • the exemplary embodiment shown in FIG. 2A has a first intermediate ring 34, which is arranged between an outlet-side anchor surface 35 and the damping element 32.
  • the first intermediate ring 34 has a two-fold task: on the one hand, the first intermediate ring 34 represents a protection of the damping element 32 against the armature 20 impinging on it, since in particular the edges of the fuel channel 30a can damage the damping element 32 during continuous operation of the fuel injection valve 1 and thus damage the damping element 32 correct functioning of the fuel injector 1 is no longer guaranteed.
  • the first intermediate ring 34 provides for the drainage of an inner volume 36 between the damping element 32 and the valve needle 3, into which fuel penetrates during the operation of the fuel injection valve 1, through a specifically applied surface structure.
  • the surface structure of the first intermediate ring 34 thus creates a connection between the inner volume 36 and a central recess 42 of the fuel injector 1.
  • the fuel compressed in the inner volume 36 can also not be drained radially but axially in the outflow direction.
  • the second flange 31 is attached to the valve needle 3 by means of segment welding.
  • the second flange 31 is not connected to the valve needle 3 via a weld seam 33 that runs around the circumference without gaps, but via individual welding segments 37, which, as shown in FIG. 2B, have, for example, a radial angular extent of approximately 90 ° and two drainage gaps 38, which likewise have an angular extent of approximately 90 °.
  • the fuel compressed in the inner volume 36 can thus flow away via the drainage gaps 38 between the valve needle 3 and the second flange 31.
  • the ' segment welding ' method has the particular advantage that the compressed fuel can easily be discharged into the inner volume 36 without additional components.
  • welding segments 37 for connecting the second flange 31 to the valve needle 3, but, for example, four welding segments 37 lying opposite one another in a cross shape, with correspondingly four intermediate drainage gaps 38.
  • the number of welding segments 37 and the drainage gaps 38 can correspond to the requirements be adjusted.
  • FIG. 3 shows an excerpted sectional illustration of a further exemplary embodiment of the fuel injector 1 according to the invention.
  • a second intermediate ring 39 is inserted between the second flange 31 and the damping element 32.
  • radial grooves are expediently provided on a drain-side side 40 of the first intermediate ring 34 and an inlet-soap side 41 of the second intermediate ring 39, through which the fuel from the inner volume 36 between the first intermediate ring 34 and the second intermediate ring 39 can run on the surface of the damping element 32.
  • the structure of the drain-side side 40 of the first intermediate ring 34 and the inlet-side 41 of the second intermediate ring 39 can be generated, for example, by embossing or milling.
  • Another possibility of removing the fuel stowed in the inner volume 36 is to make radial bores 43 in the second flange 31, which, for example, produce a connection between the inner volume 36 and the central recess 42 of the fuel injection valve 1 just below the damping element 32.
  • the ' number of holes' can be limited to one, but several, e.g. B. holes 43 arranged at equal angular intervals.
  • valve needle bouncer is reduced by these measures, since the valve needle 3, after the valve closing body 4 has been put on, has resistance due to the viscosity of the fuel in the inner volume 36 and therefore no longer has any possibility of moving again in the stroke direction.
  • the invention is not limited to the illustrated embodiments and z. B. also suitable for outward opening fuel injection valves 1 or other anchor shapes, for example flat anchors.

Abstract

L'invention concerne une soupape d'injection de carburant (1), en particulier une soupape d'injection de carburant destinée au système d'injection de carburant d'un moteur à combustion interne, qui comprend un pointeau de soupape (3) qui coopère avec une surface de siège de soupape (6) pour former une zone étanche, ainsi qu'un induit (20) qui agit sur ledit pointeau de soupape (3), cet induit pouvant se déplacer axialement contre le pointeau de soupape (3), et ce mouvement étant amorti par un élément d'amortissement (32) constitué d'un élastomère. Entre l'induit (20) et l'élément amortisseur (32) se trouve une première bague intermédiaire (34). L'élément amortisseur (32) repose sur une bride (31) reliée par liaison de force au pointeau de soupape (3). La bague intermédiaire (34) et/ou la bride (31) présentent des canaux radiaux et/ou axiaux qui relient un volume intérieur (36), qui se trouve entre le pointeau de soupape (3) et l'élément amortisseur (32), à une cavité (42) centrale de la soupape d'injection de carburant (1).
EP01955273A 2000-08-10 2001-07-20 Soupape d'injection de carburant Expired - Lifetime EP1309789B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10039078 2000-08-10
DE10039078A DE10039078A1 (de) 2000-08-10 2000-08-10 Brennstoffeinspritzventil
PCT/DE2001/002765 WO2002012709A1 (fr) 2000-08-10 2001-07-20 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1309789A1 true EP1309789A1 (fr) 2003-05-14
EP1309789B1 EP1309789B1 (fr) 2006-01-04

Family

ID=7651996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01955273A Expired - Lifetime EP1309789B1 (fr) 2000-08-10 2001-07-20 Soupape d'injection de carburant

Country Status (8)

Country Link
US (1) US6808134B2 (fr)
EP (1) EP1309789B1 (fr)
JP (1) JP4646180B2 (fr)
KR (1) KR20020037067A (fr)
CN (1) CN1253656C (fr)
CZ (1) CZ20021250A3 (fr)
DE (2) DE10039078A1 (fr)
WO (1) WO2002012709A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE10043085A1 (de) * 2000-09-01 2002-03-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10208224A1 (de) 2002-02-26 2003-09-11 Bosch Gmbh Robert Brennstoffeinspritzventil
ITBO20030090A1 (it) 2003-02-21 2004-08-22 Magneti Marelli Powertrain Spa Iniettore di carburante per un motore a combustione interna.
DE10308914B4 (de) * 2003-02-28 2013-11-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10326343A1 (de) * 2003-06-11 2004-12-30 Robert Bosch Gmbh Brennstoffeinspritzventil
CN100389258C (zh) * 2004-06-02 2008-05-21 株式会社电装 燃料喷射阀
JP4790441B2 (ja) * 2006-02-17 2011-10-12 日立オートモティブシステムズ株式会社 電磁燃料噴射弁及びその組立て方法
EP2112366B1 (fr) * 2008-04-23 2011-11-02 Magneti Marelli S.p.A. Injecteur de carburant électromagnétique pour carburants gazeux avec dispositif d'arrêt anti-usure
DE102010064105A1 (de) * 2010-12-23 2012-01-19 Robert Bosch Gmbh Ventil zum Einspritzen von Kraftstoff
EP2896812B1 (fr) * 2014-01-16 2017-09-06 Continental Automotive GmbH Injecteur à carburant
US10125884B2 (en) * 2015-02-26 2018-11-13 Honda Motor Co., Ltd. Attachment structure for solenoid valve
DE102015213221A1 (de) * 2015-07-15 2017-01-19 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
CN108138715B (zh) * 2015-10-15 2022-02-25 大陆汽车有限公司 具有防弹跳装置的燃料喷射阀、燃烧发动机和车辆
DE102017207273A1 (de) * 2016-06-30 2018-01-04 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102017218764A1 (de) * 2017-10-20 2019-04-25 Robert Bosch Gmbh Magnetventil zum Steuern von Fluiden
DE102017222501A1 (de) * 2017-12-12 2019-06-13 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids

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Also Published As

Publication number Publication date
CZ20021250A3 (cs) 2003-10-15
CN1388861A (zh) 2003-01-01
KR20020037067A (ko) 2002-05-17
WO2002012709A1 (fr) 2002-02-14
CN1253656C (zh) 2006-04-26
JP4646180B2 (ja) 2011-03-09
DE50108625D1 (de) 2006-03-30
DE10039078A1 (de) 2002-02-21
JP2004506127A (ja) 2004-02-26
US20030047160A1 (en) 2003-03-13
EP1309789B1 (fr) 2006-01-04
US6808134B2 (en) 2004-10-26

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