EP1364116A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1364116A1
EP1364116A1 EP02717970A EP02717970A EP1364116A1 EP 1364116 A1 EP1364116 A1 EP 1364116A1 EP 02717970 A EP02717970 A EP 02717970A EP 02717970 A EP02717970 A EP 02717970A EP 1364116 A1 EP1364116 A1 EP 1364116A1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injection
valve needle
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.)
Granted
Application number
EP02717970A
Other languages
German (de)
English (en)
Other versions
EP1364116B1 (fr
Inventor
Hubert Stier
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 EP1364116A1 publication Critical patent/EP1364116A1/fr
Application granted granted Critical
Publication of EP1364116B1 publication Critical patent/EP1364116B1/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
    • 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
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention relates to a fuel injector according to the preamble of claim 1.
  • an electromagnetically actuated fuel injection valve in which an armature interacts with an electrically excitable solenoid for electromagnetic actuation and the stroke of the armature is transmitted to a valve closing body via a valve needle.
  • the valve closing body interacts with a valve seat.
  • the armature is not rigidly attached to the valve needle, but is arranged to be axially movable relative to the valve needle.
  • a first return spring acts on the valve needle in the closing direction and thus keeps the fuel injector closed when the solenoid is de-energized and not energized.
  • the armature is acted upon in the stroke direction by means of a second return spring such that the armature in the rest position rests against a first stop provided on the valve needle.
  • a disadvantage of the fuel injector known from DE-OS 33 14 899 is, in particular, the complicated design, which provides for several individual components for the upper and the lower anchor stop. As a result, the manufacturing tolerances of the individual components add up to an overall tolerance, which has a disadvantageous effect on the switching precision of the fuel injector.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that one of the armature stops, which define the size of a forward stroke gap for an armature free path construction, is formed in one piece with the valve needle, as a result of which accuracy in manufacturing processes has less of an impact due to the saving of at least one component ,
  • the armature stop arranged on the outflow side of the armature is formed in one piece with the valve needle and forms a collar against which the armature rests.
  • the size of the pre-stroke gap can be adjusted by moving the driving flange in the valve needle.
  • a pre-lift spring acts on the armature in the idle state of the fuel injector, so that it is held in contact on the outflow-side armature stop.
  • the fuel flowing through the fuel injection valve can be passed directly through the valve needle to the flow openings and to the sealing seat without diversions.
  • Another advantage is the formation of a guide area on the driver flange, which ensures precise guidance of the valve needle during its axial movement.
  • Fig. 1 shows a schematic section through an embodiment of a fuel injector designed according to the invention.
  • a fuel injector 1 is in the form of a fuel injector for fuel injection systems of mixed compression, 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.
  • fuel injector 1 is a fuel injector 1 that opens inward and has a spray opening 7.
  • the nozzle body 2 is preferably connected by welding to an 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 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 can be molded onto the inner pole 13.
  • Valve needle 3 is performed in the present embodiment, thin-walled hollow cylinder and has a central recess 8.
  • Flow-through openings 14, which are introduced into the wall of the valve needle 3, serve for the fuel line to the sealing seat.
  • the valve needle 3 has at its inflow-side end a collar-shaped anchor stop 32 which is formed in one piece with the valve needle 3.
  • An anchor 20 is supported on the anchor stop 32. This is non-positively connected to the valve needle 3 via a driver flange 21.
  • the driver flange 21 is also tubular and extends through the armature 20 through a central recess 33. The driver flange 21 is inserted into the inflow end of the valve needle 3 and through a weld 15 is connected to the valve needle 3.
  • a restoring spring 23 is supported on the driving flange 21, which in the present design of the fuel injection valve 1 is preloaded by a sleeve 24.
  • the return spring 23 acts on the valve needle 3 via the driving flange 21 so that the valve closing body 4 is held in sealing contact with the valve seat surface 6.
  • the driver flange 21 has an outer circumferential surface, which supports the valve needle 3 during its axial movement when actuating the fuel injector 1 as a guide area such that center offsets and subsequent malfunctions of the fuel injector 1 can be avoided by a tilted or jammed valve needle 3. Downstream of the projection 34, the driver flange 21 has a guide section 36 which serves to guide the armature 20.
  • a pre-lift spring 22 is arranged which acts on the armature 20 in such a way that it is held in contact with the armature stop 32.
  • the fuel which is supplied via a central fuel supply 16 and filtered by a filter element 25, is passed through the recess 8 of the valve needle 3, a through opening 37 in the driving flange 21 and through the throughflow openings 14 to the spray opening 7.
  • the fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
  • the driver flange 21 inserted into the valve needle 3 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact.
  • the armature 20 rests on the armature stop 32 when acted upon by the pre-lifting spring 22.
  • the magnetic coil 10 When the magnetic coil 10 is excited, it is installed Magnetic field, which moves the armature 20 against the spring force of the preliminary stroke spring 22 and the return spring 23 in the stroke direction.
  • the stroke of the armature 20 is divided into a preliminary stroke, which serves to close a preliminary stroke gap 30, and an opening stroke.
  • the axial height of the forward stroke gap 30 is defined by a shoulder 35 of the driver flange 21 facing the armature 20, which is undercut by the armature 20 after the forward stroke gap 30 is closed, as a result of which the frictional connection for actuating the valve needle 3 is achieved.
  • the armature 20 After passing through the forward stroke against the force of the preliminary stroke spring 22, the armature 20 takes the driving flange 21, which is welded to the valve needle 3, and thereby the valve needle 3 in the stroke direction.
  • the valve closing body 4, which is operatively connected to the valve needle 3, lifts off from the valve seat surface 6, as a result of which the fuel which is led via the recess 8 in the valve needle 3 and through the throughflow openings 14 to the spray opening 7 is sprayed off.
  • 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 on the driving flange 21, as a result of which the valve needle 3 moves counter to the stroke direction.
  • the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • the anchor 20 touches the anchor stop 32.
  • the pre-lift spring 22 has a damping effect against bouncing of the armature 20 on the armature stop 32 when the fuel injector 1 closes. If the armature 20 is in contact with the armature stop 32, the armature 20 can be lifted briefly from the armature stop 32 again come. The prestroke spring 22 brakes the resulting motion of the armature "20 from in the lifting direction, so that the driving flange 21 and thus also the valve needle 3 remain unaffected by the movement of the armature 20 and no undesirable, short-term opening operations of the fuel injection valve 1 occur.
  • the invention is not restricted to the exemplary embodiments shown and can also be used for other forms of anchors 20, for example for submersible and flat anchors, as well as any construction 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), en particulier pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne à compression de mélange et allumage par appareillage externe. Cette soupape d'injection de carburant comprend un induit (20), coopérant avec une bobine magnétique (10), et un pointeau (3) de soupape communiquant par liaison de force avec l'induit (20), lequel pointeau comporte un corps de fermeture (4) de soupape formant un siège d'étanchéité conjointement avec une surface de siège (6) de soupape. Ce pointeau (3) de soupape présente sur une extrémité côté admission une butée (32) d'induit en une pièce sous forme de rebord, butée sur laquelle l'induit (20) vient buter. Selon cette invention, une bride d'entraînement (21) traverse l'induit (20), de sorte que la bride d'entraînement (21) peut être introduite dans l'extrémité côté admission du pointeau (3) de soupape et reliée à ladite extrémité.
EP02717970A 2001-02-24 2002-02-25 Soupape d'injection de carburant Expired - Lifetime EP1364116B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10108945A DE10108945A1 (de) 2001-02-24 2001-02-24 Brennstoffeinspritzventil
DE10108945 2001-02-24
PCT/DE2002/000661 WO2002068810A1 (fr) 2001-02-24 2002-02-25 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1364116A1 true EP1364116A1 (fr) 2003-11-26
EP1364116B1 EP1364116B1 (fr) 2005-11-02

Family

ID=7675361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02717970A Expired - Lifetime EP1364116B1 (fr) 2001-02-24 2002-02-25 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6932283B2 (fr)
EP (1) EP1364116B1 (fr)
JP (1) JP4335528B2 (fr)
KR (1) KR100851767B1 (fr)
CN (1) CN100402831C (fr)
DE (2) DE10108945A1 (fr)
WO (1) WO2002068810A1 (fr)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10361761A1 (de) * 2003-12-29 2005-07-28 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005052255B4 (de) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
US7472844B2 (en) * 2005-12-21 2009-01-06 Caterpillar Inc. Fuel injector nozzle with tip alignment apparatus
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
US7565893B2 (en) 2007-09-10 2009-07-28 Gm Global Technology Operations, Inc. Spark ignited direct injection flow geometry for improved combustion
US8430078B2 (en) 2007-12-21 2013-04-30 Robert Bosch Gmbh Fuel injection valve
US8651323B2 (en) * 2008-02-07 2014-02-18 Kenneth R. Balkin Hand protection barrier dispenser
JP5152024B2 (ja) * 2009-02-04 2013-02-27 株式会社デンソー 燃料噴射弁
EP2333297B1 (fr) 2009-12-11 2013-03-20 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
JP2011185264A (ja) * 2010-02-11 2011-09-22 Denso Corp インジェクタ
CN102003317B (zh) * 2010-11-16 2012-06-06 亚新科南岳（衡阳）有限公司 汽油直喷喷油器
JP5862941B2 (ja) * 2011-11-08 2016-02-16 株式会社デンソー 燃料噴射弁
KR101361809B1 (ko) * 2011-12-23 2014-02-11 대동공업주식회사 유압발생모듈 및 이를 포함하는 전기구동식 다목적 운반차량
DE102012202253A1 (de) * 2012-02-15 2013-08-22 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102012203124A1 (de) 2012-02-29 2013-08-29 Robert Bosch Gmbh Einspritzventil
DE102012207406A1 (de) 2012-05-04 2013-11-07 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102012208136A1 (de) 2012-05-15 2013-11-21 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102012210415A1 (de) 2012-06-20 2013-12-24 Robert Bosch Gmbh Einspritzventil
DE102012215779A1 (de) * 2012-09-06 2014-03-06 Robert Bosch Gmbh Einspritzventil
EP2706220B1 (fr) * 2012-09-07 2016-06-29 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102012220484A1 (de) 2012-11-09 2014-05-15 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
EP2837813B1 (fr) * 2013-08-14 2016-04-06 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102013218261A1 (de) 2013-09-12 2015-03-12 Robert Bosch Gmbh Ventil zum Einspritzen von Kraftstoff
EP2863045B1 (fr) * 2013-10-15 2016-09-14 Continental Automotive GmbH Procédé de fabrication d'un injecteur pour moteur à combustion, ensemble d'aiguille-armature et injecteur de fluide
DE102013221320A1 (de) 2013-10-21 2015-04-23 Robert Bosch Gmbh Verfahren zur Sicherstellung des Kaltstarts eines mit Ethanol-Kraftstoff betriebenen Ottomotors
DE102013222596A1 (de) 2013-11-07 2015-05-07 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013222613A1 (de) 2013-11-07 2015-05-07 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013222590A1 (de) 2013-11-07 2015-05-21 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013223458A1 (de) 2013-11-18 2015-05-21 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
DE102013223453A1 (de) 2013-11-18 2015-05-21 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
EP3139030A1 (fr) * 2015-09-03 2017-03-08 Continental Automotive GmbH Injecteur pour moteur à combustion
US10871134B2 (en) * 2015-09-24 2020-12-22 Vitesco Technologies GmbH Valve assembly for an injection valve and injection valve
DE102015226181A1 (de) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102018218678A1 (de) 2018-10-31 2020-04-30 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil
DE102018221086A1 (de) 2018-12-06 2020-06-10 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

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US5494223A (en) * 1994-08-18 1996-02-27 Siemens Automotive L.P. Fuel injector having improved parallelism of impacting armature surface to impacted stop surface
US5605289A (en) * 1994-12-02 1997-02-25 Caterpillar Inc. Fuel injector with spring-biased control valve
US5961097A (en) 1996-12-17 1999-10-05 Caterpillar Inc. Electromagnetically actuated valve with thermal compensation
US6021963A (en) 1997-12-23 2000-02-08 Caterpillar Inc. Cartridge control valve with top mounted solenoid and flat valve seat for a fuel injector
DE19820341C2 (de) * 1998-05-07 2000-04-06 Daimler Chrysler Ag Betätigungsvorrichtung für eine Hochdruck-Einspritzdüse für flüssige Einspritzmedien
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Also Published As

Publication number Publication date
KR20020089501A (ko) 2002-11-29
KR100851767B1 (ko) 2008-08-13
WO2002068810A1 (fr) 2002-09-06
DE10108945A1 (de) 2002-09-05
JP4335528B2 (ja) 2009-09-30
US20030160117A1 (en) 2003-08-28
CN1457391A (zh) 2003-11-19
DE50204771D1 (de) 2005-12-08
CN100402831C (zh) 2008-07-16
JP2004518858A (ja) 2004-06-24
EP1364116B1 (fr) 2005-11-02
US6932283B2 (en) 2005-08-23

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