EP1315900B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1315900B1
EP1315900B1 EP01964937A EP01964937A EP1315900B1 EP 1315900 B1 EP1315900 B1 EP 1315900B1 EP 01964937 A EP01964937 A EP 01964937A EP 01964937 A EP01964937 A EP 01964937A EP 1315900 B1 EP1315900 B1 EP 1315900B1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injection
valve
valve needle
injection 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.)
Expired - Lifetime
Application number
EP01964937A
Other languages
German (de)
English (en)
Other versions
EP1315900A1 (fr
Inventor
Martin Mueller
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 EP1315900A1 publication Critical patent/EP1315900A1/fr
Application granted granted Critical
Publication of EP1315900B1 publication Critical patent/EP1315900B1/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
    • F02M61/04—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
    • 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
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • the disadvantage here is in particular the complex design with an additional component. Also, the large-area elastomer ring is unfavorable for the course of the magnetic field and makes it difficult to close the field lines and thus the achievement of high attraction forces in the opening movement of the fuel injection valve.
  • a further cylindrical mass is provided, which is movably clamped by two elastomeric rings in position and held. Upon impact of the valve needle on the valve seat, this second mass can move relative to the armature and valve needle and prevent bouncing of the valve needle.
  • a fuel injection valve which comprises a valve needle which cooperates with a valve seat surface to a sealing seat, and an armature acting on the valve needle, wherein the armature is arranged to be axially movable on the valve needle and of a damping element made of an elastomer is damped.
  • a first intermediate ring is arranged between the armature and the damping element.
  • the intermediate element and / or the flange have radial and / or axial channels which connect an internal volume located between the valve needle and the damping element to a central recess of the fuel injection valve.
  • the drainage channels serve to avoid disadvantageous bouncers of the armature or of the valve needle.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that the armature and the valve needle are damped by a liquid damper, which is formed by the interaction of an elastomeric ring and a liquid-filled chamber between the armature and valve needle.
  • a liquid damper which is formed by the interaction of an elastomeric ring and a liquid-filled chamber between the armature and valve needle.
  • the throttle effect of the throttle gap between valve needle and armature wall is advantageous which is pressed during the closing movement of fuel from the annulus.
  • the fuel injection valve 1 is in the form of a fuel injection valve for fuel injection systems of mixture-compression, spark-ignited Internal combustion engine running.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with a valve closing body 4, which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1 which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and, the outer pole 9 are separated by a constriction 26 and are connected to each other by a non-ferromagnetic connecting member 29.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the dial 15 is an armature 20. This is frictionally connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 to the first flange 21.
  • a return spring 23 On the flange 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • Fuel channels 30a to 30c which conduct the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the ejection opening 7.
  • the fuel injection valve 1 is sealed by a seal 28 against a fuel line, not shown.
  • annular damping element 32 On the discharge side of the armature 20, an annular damping element 32, which consists of an elastomer material, arranged. It rests on a second flange 31 which is non-positively connected to the valve needle 3 via a weld 33.
  • the first flange 21 is welded to the valve needle 3, the armature 20 and the damping element 32 attached and then the second flange 31 pressed under pressure on the damping element 32 and also with the valve needle. 3 welded.
  • the armature 20 has only a slight, strongly damped play between the first flange 21 and the damping element 32nd
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement. Upon energization of the magnetic coil 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke is determined by a located in the rest position between the inner pole 13 and the armature 20 working gap 27.
  • the armature 20 takes the flange 21, which is welded to the valve needle 3, also in the stroke direction with.
  • the valve closing body 4 communicating with the valve needle 3 lifts off from the valve seat surface 6 and the fuel guided via the fuel channels 30a to 30c is sprayed through the injection opening 7.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the standing with the valve needle 3 in connection flange 21 moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve is 1. founded.
  • Fig. 2 shows an excerpted sectional view of the designated in Fig. 1 with II section of the fuel injector 1. Matching components are provided with matching reference numerals.
  • the present first embodiment of a fuel injection valve 1 according to the invention on a discharge side 42 of the armature 20 an inner annular projection 34 and a funnel-shaped recess 35.
  • the fuel channel 30a opens into the funnel-shaped recess 35.
  • the annular projection 34 which is penetrated by the valve needle 3 in a central recess 38 of the armature 20, is supported on the damping element 32 and thus on the second flange 31, which is materially connected via the weld 33 with the valve needle 3.
  • the second flange 31 has an annular recess 36, in which the damping element 32 is arranged and which is covered cover-like by the annular projection 34.
  • the annular projection 34 lies here on the damping element 32.
  • the annular recess 36 has an inner edge 43 facing the valve needle 3 and a radially outer edge 44 which is axially higher than the inner edge 43.
  • the annular projection 34 closes the annular recess 36 to the outside, while in the idle state of the fuel injection valve 1 between the edge 43 and the projection 34, an axial gap 45 remains.
  • a radially through the valve needle 3 and the damping element 32 limited annular space 37 is formed in the annular recess 36 a radially through the valve needle 3 and the damping element 32 limited annular space 37 is formed.
  • the annular space 37 is filled with fuel, which flows via the acting as a throttle central recess 38 of the armature 20 into the annular space 37.
  • the fuel in the annular space 37 is compressed by the initially opposing movements of the armature 20 and the valve needle 3.
  • the armature 20 can swing through only to the point at which the gap 45 between the edge 43 and the projection 34 of the armature 20 is closed. Due to the closed shape of the annular space 37, the fuel can leave the annular space 37 only through the throttle gap 39 acting as a throttle between an inner wall 40 of the armature 20 and the valve needle 3.
  • the movement of the armature 20 and on the other hand the remindschwingterrorism the valve needle 3 is attenuated.
  • FIG. 3 shows in the same view as FIG. 2 a second exemplary embodiment of the fuel injection valve 1 according to the invention.
  • the second flange 31 is provided with a deeper annular recess 36 than in the previous embodiment.
  • the outer edge 44 of the second flange 31 is increased while the inner edge 43 is absent.
  • a lower end 46 of the supernatant 34 of the armature 20 is formed so that the damping element 32 is disposed radially between the thin end 46 of the supernatant 34 and the edge 44 of the second flange 31, wherein between the lower end 46 of the supernatant 34 and the second flange 45 is formed an axial gap.
  • the second embodiment of the fuel injection valve 1 according to the invention is not so much to an accurate and accurate production or obstruction of the individual components, whereby the production and installation of the components can be made cheaper.
  • the second embodiment of the fuel injection valve 1 is similar to the first embodiment shown in FIG.
  • the armature 20 swings through, whereby the damping element 32 and the fuel in the annular space 37 are compressed by the projection 34 of the armature 20.
  • the armature 20 can only so far swing through until the lower end 46 of the projection 34 impinges on the second flange 31.
  • the damping element 32 absorbs most of the kinetic energy of the armature 20, while the fuel displaced from the annular space 37 exits through the throttle gap 39 between the valve needle 3 and the inner wall 40 of the armature 20, whereby the swinging of the valve needle 3 is decelerated and the valve closing body 4 is prevented from again briefly withdraw from the valve seat surface 6.
  • the illustrated in Fig. 4 third embodiment of the fuel injection valve 1 according to the invention differs slightly in construction from the two previous embodiments.
  • the annular projection 34 of the armature 20 forms a cap-shaped cover sleeve 41, on which the projection 34 of the armature 20 is supported, the annular recess 36.
  • the annular recess 36 is open in the third embodiment in the outflow direction of the fuel.
  • the second flange 31 is formed flat here and closes the annular recess 36 in the form of a cover in the outflow direction.
  • the cover sleeve 41 has the particular advantage that it can be produced particularly easily as a separate component independently of the armature 20.
  • the damping element 32 is arranged, the annular space 37 is as in the previous embodiments with the throttle gap 39 between the inner wall 40 of the armature 20 and the valve needle 3 in connection.
  • the components of the third embodiment have the advantage that on the one hand they are particularly easy to produce and on the other hand, the armature 20 can be designed so that the introduced in the armature 20 fuel passage 30a can be easily processed and deburred on its downstream side.
  • the armature 20 When closing the fuel injection valve 1, the armature 20 in turn oscillates in Abspritzutter, whereby the cap-shaped cover sleeve 41 via the second flange 31st is pushed, since the outer diameter of the flange 31 corresponds to the inner diameter of the jacket portion of the cover sleeve 41 and is minimally smaller.
  • the gap 45 need not be limited by a particular geometric arrangement as in the embodiments described above, but in this case is equal to the height of the annulus 37.
  • the invention is not limited to the illustrated embodiments and e.g. also suitable for flat anchors or for any designs of fuel injection valves.

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)

Claims (12)

  1. Injecteur de carburant (1), notamment pour des systèmes d'injection de carburant de moteurs à combustion interne, avec une aiguille d'injection (3) dont l'obturateur de soupape (4) coopère avec une surface de siège de soupape (6) pour former un siège étanche, et avec un induit (20) agissant sur l'aiguille d'injection (3), mobile axialement sur l'aiguille d'injection (3) en étant amorti par un élément d'amortissement (32) en élastomère installé entre une bride (31) fixée sur l'aiguille d'injection (3) et l'induit (20),
    caractérisé en ce que
    la bride (31) est pourvue d'un évidement annulaire (36), logeant l'élément d'amortissement (32), et un espace annulaire (37) formé entre l'aiguille (3) et l'élément d'amortissement (32), est rempli de carburant, cet espace annulaire (37) étant en communication avec une fente d'étranglement (39) de l'aiguille (3).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la fente d'étranglement (39) est formée entre l'aiguille d'injection (3) et une paroi intérieure (40) de l'induit (20).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce qu'
    un dépassement annulaire rond (34) de l'induit (20) recouvre l'évidement annulaire (36).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    le dépassement (34) de l'induit (20) repose sur l'élément d'amortissement (32) disposé dans l'évidement annulaire (36).
  5. Injecteur de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    l'induit (20) présente sur un côté (42) situé du côté de l'écoulement, un évidement en forme d'entonnoir (35), dans lequel débouche un canal de carburant (30a) traversant l'induit (20).
  6. Injecteur de carburant selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce qu'
    un bord intérieur (43) de la bride (31), tourné vers l'aiguille d'injection (3), est plus bas qu'un bord extérieur (44) de la bride (31).
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce qu'
    une fente (45) est formée entre le bord intérieur (43) et un dépassement (34) de l'induit (20).
  8. Injecteur de carburant selon la revendication 7,
    caractérisée en ce que
    la fente (45) est en communication avec la fente d'étranglement (39).
  9. Injecteur de carburant selon l'une quelconque des revendications 4, 7 ou 8,
    caractérisé en ce que
    le dépassement (34) présente une extrémité inférieure (46), dont le diamètre est plus petit que le diamètre de la bride (31).
  10. Injecteur de carburant selon la revendication 9,
    caractérisé en ce que
    l'élément d'amortissement (32) est serré radialement entre l'extrémité inférieure (46) du dépassement (34) et la bride (31).
  11. Injecteur de carburant (1), notamment pour des installations d'injection de carburant de moteurs à combustion interne, avec une aiguille d'injection (3) dont le corps de fermeture de soupape (4) coopère avec une surface de siège de soupape (6) pour former un siège étanche, et avec un induit (20) agissant sur l'aiguille d'injection (3), et mobile axialement sur l'aiguille d'injection (3) en étant amorti par un élément d'amortissement (32) en élastomère disposé entre une bride (31) fixée sur l'aiguille d'injection (3) et l'induit (20),
    caractérisé en ce qu'
    on prévoit sur l'induit (20) un dépassement annulaire rond (34) et en ce le dépassement (34) s'appuie sur une douille de recouvrement (41), réalisée en forme de coiffe avec un évidement annulaire (36) et traversée par l'aiguille d'injection (3), et la bride (31) est en forme de disque plat, l'élément d'amortissement (32) est disposé dans l'évidement annulaire (36), et un espace annulaire (37) est formé entre l'aiguille d'injection (3) et l'élément d'amortissement (32), étant rempli de carburant, cet l'espace annulaire (37) est en communication avec une fente d'étranglement (39) de l'aiguille d'injection (3).
  12. Injecteur de carburant selon la revendication 11,
    caractérisé en ce que
    la bride (31) présente un diamètre extérieur, qui correspond au diamètre intérieur de la douille de recouvrement (41).
EP01964937A 2000-09-01 2001-08-25 Soupape d'injection de carburant Expired - Lifetime EP1315900B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10043085A DE10043085A1 (de) 2000-09-01 2000-09-01 Brennstoffeinspritzventil
DE10043085 2000-09-01
PCT/DE2001/003266 WO2002018776A1 (fr) 2000-09-01 2001-08-25 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1315900A1 EP1315900A1 (fr) 2003-06-04
EP1315900B1 true EP1315900B1 (fr) 2006-05-03

Family

ID=7654627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01964937A Expired - Lifetime EP1315900B1 (fr) 2000-09-01 2001-08-25 Soupape d'injection de carburant

Country Status (8)

Country Link
US (1) US6745993B2 (fr)
EP (1) EP1315900B1 (fr)
JP (1) JP2004507661A (fr)
KR (1) KR20020044177A (fr)
CN (1) CN1255627C (fr)
CZ (1) CZ20021505A3 (fr)
DE (2) DE10043085A1 (fr)
WO (1) WO2002018776A1 (fr)

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DE19950761A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10140795A1 (de) 2001-08-20 2003-03-06 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10256948A1 (de) * 2002-12-05 2004-06-24 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4038462B2 (ja) * 2003-09-11 2008-01-23 三菱電機株式会社 燃料噴射弁
JP4064934B2 (ja) * 2004-02-27 2008-03-19 三菱重工業株式会社 電磁弁装置
DE102004024533A1 (de) * 2004-05-18 2005-12-15 Robert Bosch Gmbh Brennstoffeinspritzventil
CN100389258C (zh) * 2004-06-02 2008-05-21 株式会社电装 燃料喷射阀
DE102004037250B4 (de) * 2004-07-31 2014-01-09 Robert Bosch Gmbh Brennstoffeinspritzventil
US7900604B2 (en) * 2005-06-16 2011-03-08 Siemens Diesel Systems Technology Dampening stop pin
JP4428357B2 (ja) * 2006-04-03 2010-03-10 株式会社デンソー 燃料噴射弁
EP2067982B1 (fr) * 2006-09-25 2013-01-16 Hitachi Ltd. Soupape d'injection de carburant
DE102006052817A1 (de) * 2006-11-09 2008-05-15 Robert Bosch Gmbh Brennstoffeinspritzventil
US8556194B2 (en) * 2010-06-23 2013-10-15 Delphi Technologies, Inc. Fuel injector
US9346074B2 (en) 2010-09-13 2016-05-24 Nordson Corporation Conformal coating applicator and method
US8534639B1 (en) * 2012-04-18 2013-09-17 HUSCO Automotive Holdings, Inc. Solenoid valve with a digressively damped armature
EP3076004B1 (fr) * 2015-04-02 2018-09-12 Continental Automotive GmbH Ensemble de soupape avec un élément de retenue de particules et soupape de fluide
DE102015213216A1 (de) * 2015-07-15 2017-01-19 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
US10731614B2 (en) 2015-10-15 2020-08-04 Continental Automotive Gmbh Fuel injection valve with an anti bounce device
DE102017207845A1 (de) * 2017-05-10 2018-11-15 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
US20190093038A1 (en) * 2017-09-22 2019-03-28 Leonard Ortiz System for Gasification on Demand
CN209164045U (zh) * 2018-11-19 2019-07-26 浙江锐韦机电科技有限公司 泵阀一体机构

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WO2002012709A1 (fr) * 2000-08-10 2002-02-14 Robert Bosch Gmbh Soupape d'injection de carburant

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Publication number Priority date Publication date Assignee Title
WO2002012709A1 (fr) * 2000-08-10 2002-02-14 Robert Bosch Gmbh Soupape d'injection de carburant

Also Published As

Publication number Publication date
EP1315900A1 (fr) 2003-06-04
KR20020044177A (ko) 2002-06-14
DE10043085A1 (de) 2002-03-14
US20030146400A1 (en) 2003-08-07
CN1388862A (zh) 2003-01-01
US6745993B2 (en) 2004-06-08
CZ20021505A3 (cs) 2003-10-15
WO2002018776A1 (fr) 2002-03-07
CN1255627C (zh) 2006-05-10
DE50109710D1 (de) 2006-06-08
JP2004507661A (ja) 2004-03-11

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