EP0558715B1 - Injecteur a commande electromagnetique - Google Patents

Injecteur a commande electromagnetique Download PDF

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Publication number
EP0558715B1
EP0558715B1 EP92918897A EP92918897A EP0558715B1 EP 0558715 B1 EP0558715 B1 EP 0558715B1 EP 92918897 A EP92918897 A EP 92918897A EP 92918897 A EP92918897 A EP 92918897A EP 0558715 B1 EP0558715 B1 EP 0558715B1
Authority
EP
European Patent Office
Prior art keywords
valve
injection valve
spring
return spring
injection
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
EP92918897A
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German (de)
English (en)
Other versions
EP0558715A1 (fr
Inventor
Ferdinand Reiter
Martin Maier
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0558715A1 publication Critical patent/EP0558715A1/fr
Application granted granted Critical
Publication of EP0558715B1 publication Critical patent/EP0558715B1/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
    • 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
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M51/0682—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 the body being hollow and its interior communicating with the fuel flow

Definitions

  • the invention relates to an electromagnetically actuated injection valve according to the preamble of the main claim.
  • the opening movement of a valve closing member interacting with a valve seat body is brought about by an armature lying in the magnetic field of a winding through which current flows, via a needle sleeve connected thereto, while the opposite closing movement is generated by a return spring acting on the valve closing member firmly connected to the needle sleeve.
  • a return spring is already known (US Pat. No. 4,944,486) which is supported on a flat end face of an adjusting bush which is pressed into a flow bore in a core of the valve and acts on the valve closing member via the needle sleeve, a commercially available cylindrical helical spring being used, At both ends a turn is created and ground flat to achieve an even load on the contact surfaces.
  • the return spring is subjected to pressure and is just like the needle sleeve and that Valve closing member rotatably arranged in the flow bore relative to the core.
  • valve closing member By turning the valve closing member in relation to the valve seat body, the sealing surfaces have to constantly adapt to each other, which leads to a change in the valve stroke set first.
  • the change in the valve stroke has the result that the amount of fuel sprayed per stroke fluctuates accordingly, as a result of which the running behavior and consumption of the internal combustion engine deteriorate.
  • the electromagnetically actuated injection valve according to the invention with the characterizing features of the main claim has the advantage that it prevents rotation of the valve closing member relative to the valve seat body by a circumferentially positive connection of the return spring to the fixed adjusting sleeve on the one hand and the needle sleeve on the other hand becomes.
  • valve seat body and the valve closing member are at right angles to each other, so that the valve lift remains unchanged after a single adjustment of the two sealing surfaces to one another.
  • the amount of fuel sprayed per stroke is essentially constant over the entire life of the valve.
  • An embodiment in which the ends of the return spring are angled toward a longitudinal valve axis is particularly advantageous, so that the sharp-edged spring ends do not scrape along the surface of the spring when they are inserted into the flow bore. This eliminates the risk that the chips produced will impair the functionality of the injection valve.
  • a complete U-shaped bending of the spring ends in the direction of the valve longitudinal axis prevents the return springs, e.g. in transport containers, chop one another and have to be separated before assembly.
  • FIGS. 2 to 5 each show an exemplary embodiment of a return spring according to the invention.
  • the injection valve shown in FIG. 1 of the drawing for an electromagnetically actuated injection valve for fuel injection systems, in particular mixture-compression-ignition internal combustion engines, has a core 2, which is surrounded by a solenoid coil 1 and serves as a fuel inlet connector. with an electrical connector 6 is injected.
  • the coil body 3 of the magnetic coil 1, which is stepped in the radial direction, has a winding 7 which is stepped in the radial direction.
  • a tubular, metallic intermediate part 12 is tightly connected, for example by welding, concentrically to a longitudinal valve axis 11 and overlaps the core end 10 partially axially with an upper cylinder section 14.
  • the stepped bobbin 3 partially overlaps the core 2 and with a step 15 of larger internal diameter the upper cylinder section 14 of the intermediate part 12.
  • the intermediate part 12 is provided at its end facing away from the core 2 with a lower cylinder section 18 which overlaps a tubular nozzle carrier 19 and with this is tightly connected, for example by welding.
  • a cylindrical valve seat body 20 is tightly mounted by welding in a through bore 22 running concentrically to the valve longitudinal axis 11.
  • the valve seat body 20 has a fixed valve seat 21 facing the magnet coil 1, downstream of which, for example, two spray openings 23 are formed in the valve seat body 20. Downstream of the spray openings 23, the valve seat body 20 has a treatment bore 24 which widens in the shape of a truncated cone in the flow direction.
  • a tubular adjusting bushing 27 is pressed into a stepped flow bore 25 of the core 2 that runs concentrically to the valve longitudinal axis 11.
  • the return spring 26, for example a helical spring, rests with one end on an end face 28 of the adjusting bushing 27 facing the valve seat body 20.
  • the press-in depth of the adjusting bushing 27 into the flow bore 25 of the core 2 determines the spring force of the return spring 26 and thus also influences the dynamic fuel quantity emitted during the opening and closing stroke of the injection valve.
  • the return spring 26 With the end facing away from the adjusting bush 27, the return spring 26 is supported in the downstream direction against an end face 50 of a needle sleeve 51.
  • Two opposite spring ends 52, 53 of the return spring 26 are bent parallel to the longitudinal valve axis 11 relative to a spring winding 54 of the return spring 26 over a length that corresponds, for example, to a three-quarter turn, as shown more clearly in FIG. 2 of the drawing.
  • the bent spring ends 52, 53 which extend in the continuation of the circumference of the return spring 26, can run such that they are aligned with one another or are rotated at an angle to one another.
  • a further angling prevents chips which are produced on the surface of the flow bore 25 by scraping the sharp-edged spring ends 52, 53 from affecting the functionality of the valve.
  • a transverse section 69 of the spring end 52, 53 extending transversely to the interior of the return spring 26 is formed on a longitudinal section 68 running parallel to the longitudinal valve axis 11.
  • the cross section 69 can, for example, have an almost straight shape as shown in FIG. 3 or may be bent towards the windings, as shown in FIG.
  • the upstream spring end 52 engages in a corresponding recess 45 of the adjusting bushing 27, which is provided eccentrically, parallel to the longitudinal valve axis 11 and e.g. is formed as a slot extending over the entire length of a wall of the adjusting bush.
  • the downstream spring end 53 engages in the same way in a corresponding recess 46 of the needle sleeve 51, which is also eccentric, parallel to the valve axis 11 and e.g. is formed as a slot extending over the entire length of a wall of the needle sleeve 51.
  • the inventive design and arrangement of the return spring 26 enables the transmission of reaction forces which are directed opposite the hydraulic forces acting on the valve closing member 55 in the circumferential direction, so that a constant position in the circumferential direction of the valve seat body 20 to the valve closing member 55 is ensured. Due to the bent or U-shaped design of the spring ends 52, 53, the catch spring 26, e.g. prevented during transport, as well as a triggering of chips from the surface of the flow bore 25 during assembly.
  • a tubular armature 49 is connected to the end of the needle sleeve 51 facing the return spring 26, for example by welding.
  • an axial gap 59 is formed, in which, by clamping, a residual air gap between an inlet-side end face 60 of the armature 49 and the end face 57 of the core end 10 forming, the stroke of the valve closing member 55 during the opening process of the valve, non-magnetic stop disk 62 is arranged.
  • the magnetic coil 1 is at least partially surrounded by at least one guide element 64, for example in the form of a bracket, which serves as a ferromagnetic element and has one end against the core 2 and the other end against the nozzle carrier 19 and with these e.g. is connected by welding or soldering.
  • guide element 64 for example in the form of a bracket, which serves as a ferromagnetic element and has one end against the core 2 and the other end against the nozzle carrier 19 and with these e.g. is connected by welding or soldering.
  • a part of the valve is enclosed by a plastic jacket 65, which extends from the core 2 in the axial direction over the magnet coil 1 with connector 6 and the at least one guide element 64.

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  • 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

Un injecteur à commande électromagnétique de la technique antérieure met en ÷uvre un ressort de rappel hélicoïdal dont les extrémités sont comprimées et ont subi une rectification plane. Un organe de fermeture de soupape et un corps de siège de soupape peuvent tourner circonférentiellement l'un par rapport à l'autre, de sorte que le nouvel ajustement en continu des faces d'étanchéité l'une par rapport à l'autre se traduit par une course qui se modifie en cours de fonctionnement et s'accompagne, en conséquence, de variations de la quantité de carburant injecté par course. Le nouvel injecteur comporte un ressort de rappel (26) dont les extrémités (52, 53) sont recourbées, s'étendent axialement et parallèlement à un axe longitudinal (11) et s'engagent, de manière à ne pas tourner, dans des évidements (45) et (46) d'une douille de réglage fixe (27) d'une part et d'une douille à aiguilles (51) d'autre part. Grâce à la position angulaire conforme du corps de siège d'injecteur (21) par rapport à l'organe de fermeture d'injecteur (55) pendant toute la durée de vie de l'injecteur, le processus d'ajustement des deux pièces se limite à une phase de rodage unique. Le nouvel injecteur convient notamment pour des systèmes d'injection de carburant dans des moteurs à combustion interne à allumage par bougie et à compression du mélange.

Claims (6)

  1. Injecteur pouvant être actionné de façon électromagnétique pour des installations d'injection de carburant de moteurs à combustion interne, avec un noyau (2) métallique s'étendant le long d'un axe longitudinal (11) de l'injecteur, avec une bobine d'électro-aimant (1) et une armature (49) grâce à laquelle on peut actionner l'organe de fermeture d'injecteur (55) coopérant avec un siège fixe d'injecteur et avec une douille de réglage (27) cylindrique enfoncée dans un alésage d'écoulement du noyau constitué de façon concentrique à l'axe longitudinal de l'injecteur, douille de réglage (27) sur laquelle s'appuie un ressort de rappel (26) qui d'autre part vient en prise sur une douille d'aiguille (51) reliée à l'organe de fermeture de l'injecteur, injecteur caractérisé en ce que le ressort de rappel (26) est replié à ses deux extrémités, l'extrémité de ressort (52) tournée vers la douille de réglage (27) venant en prise dans un évidement (45) de la douille de réglage (27) et l'extrémité de ressort (53) tournée vers la douille d'aiguille (51) venant en prise dans un évidement (46) de la douille d'aiguille (51) par engagement positif dans le sens périphérique.
  2. Injecteur selon la revendication 1, caractérisé en ce que les deux extrémités (52, 53) du ressort de rappel (26) présentent chacune une section longitudinale (68) s'étendant parallèlement à l'axe longitudinal (11) de l'injecteur, de façon rectiligne.
  3. Injecteur selon la revendication 2, caractérisé en ce qu'une section transversale (69), dirigée à l'intérieur du ressort de rappel (26), se raccorde à la section longitudinale (68).
  4. Injecteur selon la revendication 3, caractérisé en ce que la section transversale (69) est constitué en forme d'arc de cercle.
  5. Injecteur selon la revendication 4, caractérisé en ce qu'une section longitudinale (70) rectiligne, parallèle à l'axe longitudinal (11) de l'injecteur, se raccorde à la section transversale (69).
  6. Injecteur selon les revendications 1 à 5, caractérisé en ce que les extrémités du ressort (52, 53) sont disposées de façon à venir en alignement l'une par rapport à l'autre de la manière que l'on veut, ou sont décalées l'une par rapport à l'autre.
EP92918897A 1991-09-21 1992-09-02 Injecteur a commande electromagnetique Expired - Lifetime EP0558715B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4131500 1991-09-21
DE4131500A DE4131500A1 (de) 1991-09-21 1991-09-21 Elektromagnetisch betaetigbares einspritzventil
PCT/DE1992/000727 WO1993006360A1 (fr) 1991-09-21 1992-09-02 Injecteur a commande electromagnetique

Publications (2)

Publication Number Publication Date
EP0558715A1 EP0558715A1 (fr) 1993-09-08
EP0558715B1 true EP0558715B1 (fr) 1995-06-28

Family

ID=6441182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918897A Expired - Lifetime EP0558715B1 (fr) 1991-09-21 1992-09-02 Injecteur a commande electromagnetique

Country Status (6)

Country Link
US (1) US5360197A (fr)
EP (1) EP0558715B1 (fr)
JP (1) JPH06502903A (fr)
KR (1) KR930702607A (fr)
DE (2) DE4131500A1 (fr)
WO (1) WO1993006360A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842502A (en) * 1992-10-23 1998-12-01 Palmer; David W. System for controlling flow through a process region
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
JP3245035B2 (ja) * 1996-01-19 2002-01-07 三菱電機株式会社 空気制御バルブ
US5918818A (en) * 1996-05-22 1999-07-06 Denso Corporation Electromagnetically actuated injection valve
US5848780A (en) * 1997-06-05 1998-12-15 Liberty Controls, Inc. Straight fluid flow solenoid valve
DE19730202A1 (de) * 1997-07-15 1999-01-21 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE19739850A1 (de) * 1997-09-11 1999-03-18 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE10048597A1 (de) * 2000-09-30 2002-04-11 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10109411A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10142302A1 (de) * 2001-08-29 2003-03-20 Bosch Gmbh Robert Brennstoffeinspritzventil
US6644568B1 (en) 2002-10-24 2003-11-11 Visteon Global Technologies, Inc. Fuel injector with spiral-wound spring adjustment tube
DE102004025079A1 (de) * 2004-05-21 2005-12-08 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004028523A1 (de) * 2004-06-11 2005-12-29 Robert Bosch Gmbh Kraftstoffinjektor mit Spannhülse als Anschlag für Ventilnadel
DE102006002664A1 (de) * 2006-01-19 2007-08-02 Robert Bosch Gmbh Magnetventil
CN201169816Y (zh) * 2007-12-27 2008-12-24 上海科勒电子科技有限公司 冲洗控制阀阀芯
DE102008040068B4 (de) * 2008-07-02 2019-07-18 Robert Bosch Gmbh Konkave Luftspaltbegrenzung bei Magnetventil
US8286896B2 (en) * 2010-03-26 2012-10-16 Delphi Technologies, Inc. Valve seat and shroud for gaseous fuel injector
AU2011344471B2 (en) * 2010-12-14 2015-03-12 Bsh Hausgerate Gmbh Gas valve unit comprising an actuation mechanism for a solenoid valve
FR2982327B1 (fr) * 2011-11-07 2013-11-29 Delphi Tech Holding Sarl Ensemble de bouchon pour vanne haute pression
GB2519171B (en) * 2013-10-14 2016-02-17 Redd & Whyte Ltd Micro-Valve
JP6400372B2 (ja) * 2014-07-31 2018-10-03 Ntn株式会社 スプールバルブ
JP6187563B2 (ja) * 2015-09-28 2017-08-30 株式会社デンソー 燃料噴射弁
JP7116609B2 (ja) * 2018-07-05 2022-08-10 株式会社Soken 燃料噴射弁

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US189153A (en) * 1877-04-03 Improvement in attachments for automatically closing cocks and faucets
DE3825134A1 (de) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil und verfahren zur herstellung
JPH0318662A (ja) * 1989-05-29 1991-01-28 Aisan Ind Co Ltd 電磁式燃料噴射弁のノズル構造
DE4003228A1 (de) * 1990-02-03 1991-08-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE4003227C1 (en) * 1990-02-03 1991-01-03 Robert Bosch Gmbh, 7000 Stuttgart, De EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part
US5301874A (en) * 1990-05-26 1994-04-12 Robert Bosch Gmbh Adjusting sleeve for an electromagnetically actuatable valve

Also Published As

Publication number Publication date
WO1993006360A1 (fr) 1993-04-01
DE59202731D1 (de) 1995-08-03
EP0558715A1 (fr) 1993-09-08
DE4131500A1 (de) 1993-03-25
US5360197A (en) 1994-11-01
JPH06502903A (ja) 1994-03-31
KR930702607A (ko) 1993-09-09

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