EP1387941A1 - Soupape d'injection de carburant dotee d'un element d'amortissement dispose entre l'induit et la tige de soupape - Google Patents

Soupape d'injection de carburant dotee d'un element d'amortissement dispose entre l'induit et la tige de soupape

Info

Publication number
EP1387941A1
EP1387941A1 EP02732382A EP02732382A EP1387941A1 EP 1387941 A1 EP1387941 A1 EP 1387941A1 EP 02732382 A EP02732382 A EP 02732382A EP 02732382 A EP02732382 A EP 02732382A EP 1387941 A1 EP1387941 A1 EP 1387941A1
Authority
EP
European Patent Office
Prior art keywords
armature
damping element
fuel injection
sleeve
valve needle
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
EP02732382A
Other languages
German (de)
English (en)
Other versions
EP1387941B1 (fr
Inventor
Ferdinand Reiter
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 EP1387941A1 publication Critical patent/EP1387941A1/fr
Application granted granted Critical
Publication of EP1387941B1 publication Critical patent/EP1387941B1/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
    • 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
    • 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
    • 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 f injection valve of the type of the main claim.
  • Fuel injector which has a valve closing body connected to a valve needle, which cooperates with a valve seat f surface formed on a valve seat body to form a sealing seat.
  • 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 complicates the closing of the field lines and thus the achievement of high tightening forces during the opening movement of the fuel injection valve.
  • a further zylinderför ige mass is provided for damping and debouncing around the armature and the valve needle, which is 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 anchor itself is also not decoupled. His impulse thus increases the tendency for the valve needle to bounce.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the damping element: is arranged in a recess of the armature, whereby on the one hand the armature is prevented from rotating and on the other hand costly additional components and assembly costs can be saved.
  • the pot-shaped design of the sleeve which has a shoulder-like widening, by means of which the damping element can be brought to the necessary pretension, is particularly advantageous.
  • Another advantage is that both the sleeve and the damping element are simple and very precise to manufacture and malfunctions of the fuel injector are avoided.
  • through-openings are provided in the sleeve, which allow the fuel to flow unhindered through the sleeve to the sealing seat.
  • a damping element with a rectangular cross section, for example as a hose section.
  • FIG. 1 shows a schematic section through a first exemplary embodiment of a fuel injection valve according to the invention
  • FIG. 2 shows a schematic section from the first exemplary embodiment of a fuel injector according to the invention shown in FIG. 1 in area II in FIG. 1,
  • FIG. 3 shows a schematic section in the same area as in FIG. 2 from a second exemplary embodiment of a fuel injector according to the invention
  • Fig. 4 is a schematic plan view in the flow direction on the sleeve of the second embodiment shown in Fig. 3 of a fuel injector according to the invention.
  • a fuel injector 1 shown in FIG. 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • 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 with one on a Valve seat body 5 arranged valve seat surface 6 cooperates 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 magnet 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 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 .
  • 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.
  • An armature 20 is located on the other side of the adjusting disc 15. This armature is non-positively connected to the valve needle 3 via a flange 21, which is connected to the flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the flange 21 and, 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 opening 7.
  • the fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
  • a damping element 32 designed as an O-ring, which consists of an elastomer material, arranged. It rests on a ' shoulder-like widening 36 of a preferably deep-drawn sleeve 31, which is non-positively connected to the valve needle 3 via a weld seam 33.
  • the flange 21 is welded to the valve needle 3
  • the armature 20 and the damping element 32 are plugged on, and then the sleeve 31 is pressed under pressure on the damping element 32 and also with the valve needle 3 welded.
  • the armature 20 has only a strongly damped play and has only a slight tendency to twist between the 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 carries the flange 21, which is welded to the valve needle 3, in the lifting direction.
  • the valve closing body 4 connected to the valve needle 3 lifts off the valve seat surface 6 and the fuel is sprayed 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 flange 21 which is connected to the valve needle 3 moves in the opposite direction of the stroke direction.
  • the valve needle 3 is thereby in die. same direction moves, whereby the valve closing body 4 touches the valve seat 6 and the fuel injector 1 is closed.
  • FIG. 2 shows an enlarged sectional view of an enlarged view of area II in FIG. 1.
  • valve needle 3 A part of the valve needle 3 is shown, the flange 21 welded to it, the sleeve 31 and the damping element 32 designed according to the invention and inserted into the recess 35 of the armature 20.
  • flange 21 is first welded to valve needle 3 via weld 22 , 22.
  • the damping element 32 is inserted into the recess 35 formed in the downstream end face 34 of the armature 20.
  • the armature 20 with the inserted damping element 32 is placed on the valve needle 3.
  • the sleeve 31 which can preferably be produced by deep drawing, and which preferably has punched through-openings 37 for the fuel line, is pushed onto the valve needle 3 and pressed onto the damping element 32 with a shoulder-like widening 36.
  • the sleeve 31 is also connected to the valve needle via a weld seam 33 in this way under tension.
  • the damping element provides 32 while opening for an almost instantaneous opening movement, 'since the armature 20, the sleeve 31 entrains instantaneously when tightening in the magnetic field of the magnetic coil 10 via the prestressed damping element 32nd
  • the prestressing of the damping element 32 ensures, after the fuel injector 1 has closed, that bumpers of the armature 20 are absorbed on an armature stop surface formed by the sleeve 31 without the fuel injector 1 opening again undesirably.
  • the axial position of the sleeve 31 is to be selected so that a gap 38 is present between the armature 20 and the sleeve 31, which allows the armature 20 to deflect slightly.
  • the damping element 32 is, for. B. designed as an ' O-ring.
  • damping elements 32 are easier to handle and install than damping membranes, for example, and also have advantages in manufacture. Membranes often have cracks, burrs or unclean cut edges and, moreover, often tend to swell out from the side and subsequent malfunctions during operation of the fuel injector 1.
  • the O-ring-shaped damping element 32 is chambered and can therefore not be deformed even when swollen.
  • the attachment of the damping element 32 in the recess 35 in the downstream end face 34 of the armature 20 can also prevent rotation of the armature 20 and resulting stroke changes due to the prestressed assembly.
  • the endurance behavior of the fuel injector 1 is influenced positively.
  • the damping element 32 is designed as a shaped ring which is adapted to the geometry of the recess 35 in the downstream end face 34 of the armature 20.
  • the shoulder-like widening 36 of the sleeve 31 can lie better against the damping element 32, as a result of which the positive engagement is improved and the damping behavior of the fuel injection valve 1 can be influenced in a targeted manner.
  • the damping element 32 can also be produced as a molded part with a rectangular cross section, for example in the form of a hose section. This form is particularly simple and inexpensive to implement.
  • Fig. 4 shows a _ schematic plan view in the flow direction, to the sleeve '31 of the invention designed according to the fuel injection valve 1 of FIG. 2 or FIG. 3.
  • the shoulder-like widening 36 of the sleeve 31 can be recessed several times, as indicated by the hatched areas 39.
  • the damping behavior can also be influenced in a targeted manner by this measure, for example by the depth and the number of recessed sections.
  • a contact surface of the damping element 32 can also have recessed areas and lie on a flat contact surface of the sleeve.
  • the invention is not limited to the illustrated embodiment and z. B. also suitable for outward opening fuel injection valves 1 or other anchor shapes, for example flat anchors.

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) pour des installations d'injection de carburant de moteurs à combustion interne, comprenant une tige de soupape (3), coopérant avec une surface de siège de soupape (6) pour former un siège de soupape, et un induit (20) agissant sur la tige de soupape (3), cet induit (20) étant mobile dans l'axe de la tige (3) et amorti par un élément d'amortissement (32) en élastomère. Cet élément d'amortissement (32), qui appuie contre une gaine (3) communiquant par liaison de force avec la tige de soupape (3), est disposé dans un évidement (35) façonné dans une face frontale (34) de l'induit (20) orientée vers l'aval.
EP02732382A 2001-04-11 2002-04-09 Soupape d'injection de carburant dotee d'un element d'amortissement dispose entre l'induit et la tige de soupape Expired - Lifetime EP1387941B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10118162A DE10118162B9 (de) 2001-04-11 2001-04-11 Brennstoffeinspritzventil
DE10118162 2001-04-11
PCT/DE2002/001290 WO2002084102A1 (fr) 2001-04-11 2002-04-09 Soupape d'injection de carburant dotee d'un element d'amortissement dispose entre l'induit et la tige de soupape

Publications (2)

Publication Number Publication Date
EP1387941A1 true EP1387941A1 (fr) 2004-02-11
EP1387941B1 EP1387941B1 (fr) 2005-07-13

Family

ID=7681274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732382A Expired - Lifetime EP1387941B1 (fr) 2001-04-11 2002-04-09 Soupape d'injection de carburant dotee d'un element d'amortissement dispose entre l'induit et la tige de soupape

Country Status (5)

Country Link
EP (1) EP1387941B1 (fr)
JP (1) JP4210523B2 (fr)
CZ (1) CZ20023957A3 (fr)
DE (2) DE10118162B9 (fr)
WO (1) WO2002084102A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10208224A1 (de) * 2002-02-26 2003-09-11 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10345967B4 (de) * 2003-10-02 2014-02-27 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004024533A1 (de) 2004-05-18 2005-12-15 Robert Bosch Gmbh Brennstoffeinspritzventil
JP2006017101A (ja) * 2004-06-02 2006-01-19 Denso Corp 燃料噴射弁
CN100389258C (zh) * 2004-06-02 2008-05-21 株式会社电装 燃料喷射阀
DE102005030957B4 (de) 2005-06-30 2024-01-18 Robert Bosch Gmbh Einrichtung zur Dämpfung des Ankerhubs in Magnetventilen
EP2166220B1 (fr) 2008-09-19 2012-02-29 Continental Automotive GmbH Soupape d'injection
CN102671795A (zh) * 2011-03-07 2012-09-19 傅伟淇 一种喷水蜡器
JP5965253B2 (ja) 2012-02-20 2016-08-03 株式会社デンソー 燃料噴射弁
WO2013167597A1 (fr) * 2012-05-08 2013-11-14 Continental Automotive Gmbh Boîtier de soupapes destiné à une soupape d'injection et soupape d'injection
DE102013206600B4 (de) 2013-04-12 2015-08-06 Continental Automotive Gmbh Einspritzsystem zum Einspritzen von Kraftstoff in eine Brennkraftmaschine und Regelverfahren für ein solches Einspritzsystem
DE102013207555B3 (de) 2013-04-25 2014-10-09 Continental Automotive Gmbh Verfahren zur Einspritzmengenadaption
EP2796703B1 (fr) 2013-04-26 2016-07-20 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
EP3009663B1 (fr) 2014-10-15 2020-06-24 Vitesco Technologies GmbH Ensemble de soupape et injecteur de fluide
DE102015226181A1 (de) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102016218515A1 (de) * 2016-09-27 2018-03-29 Robert Bosch Gmbh Verfahren zur Steuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs

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US4766405A (en) * 1987-04-14 1988-08-23 Allied Corporation Dynamic energy absorber
US4978074A (en) * 1989-06-21 1990-12-18 General Motors Corporation Solenoid actuated valve assembly
US5299776A (en) * 1993-03-26 1994-04-05 Siemens Automotive L.P. Impact dampened armature and needle valve assembly
DE19849210A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19927900A1 (de) * 1999-06-18 2000-12-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19950761A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02084102A1 *

Also Published As

Publication number Publication date
DE10118162B9 (de) 2004-09-09
EP1387941B1 (fr) 2005-07-13
DE50203624D1 (de) 2005-08-18
WO2002084102A1 (fr) 2002-10-24
JP2004518902A (ja) 2004-06-24
DE10118162A1 (de) 2002-10-24
JP4210523B2 (ja) 2009-01-21
DE10118162C2 (de) 2003-04-24
CZ20023957A3 (en) 2004-07-14

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