EP0184126B1 - Injecteur de combustible à commande électromagnétique - Google Patents

Injecteur de combustible à commande électromagnétique Download PDF

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Publication number
EP0184126B1
EP0184126B1 EP85115033A EP85115033A EP0184126B1 EP 0184126 B1 EP0184126 B1 EP 0184126B1 EP 85115033 A EP85115033 A EP 85115033A EP 85115033 A EP85115033 A EP 85115033A EP 0184126 B1 EP0184126 B1 EP 0184126B1
Authority
EP
European Patent Office
Prior art keywords
closure plate
outlet
valve
valve closure
plate
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
Application number
EP85115033A
Other languages
German (de)
English (en)
Other versions
EP0184126A1 (fr
Inventor
Martin Horn
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to AT85115033T priority Critical patent/ATE33701T1/de
Publication of EP0184126A1 publication Critical patent/EP0184126A1/fr
Application granted granted Critical
Publication of EP0184126B1 publication Critical patent/EP0184126B1/fr
Expired 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
    • 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
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0639—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature acting as a valve
    • 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
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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
    • F02M61/06—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 the valves being furnished at seated ends with pintle or plug shaped extensions
    • 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
    • F02M2200/07—Fuel-injection apparatus having means for avoiding sticking of valve or armature, e.g. preventing hydraulic or magnetic sticking of parts
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to an electromagnetically actuated fuel injection valve for injection systems of internal combustion engines, with a valve housing, a soft iron core arranged within the valve housing and carrying a fixed lifting magnet winding, and a valve closure plate forming an armature, which forms an armature and faces this and forms an armature an outlet surrounding ring seat can be acted upon and is guided axially movably with its radially circumferential edge on a guide correspondingly surrounding it.
  • the object of the invention is to provide a fuel injection valve according to the preamble, which enables a uniform and easily atomizable outlet of the fuel from the outlet at a defined outlet angle.
  • valve closure plate has a coaxially protruding pin which projects through or into the outlet and has a fillet-shaped transition to the outlet-side surface of the valve closure plate, the transition forming a recess in the outlet-side surface of the valve closure plate.
  • valve closure plate In order to guide the pin centrally in the outlet, the valve closure plate is guided with its peripheral edge. However, this edge can jam in its guide and tilt in the process, which leads to an inclination of the pin in the outlet. However, this has a negative impact on the outlet of the fuel from the outlet.
  • the valve closure plate can have a crowned cross section on its radially circumferential edge (cf. DE-B-1 060 663), the edge preferably being ground.
  • valve closure plate does not lift off the entire ring seat at the same time during an opening or closing process, but instead only allows fuel to flow through when resting on one side of the ring seat on the opposite side of the ring seat, the pin is inclined and thus has a negative influence on the beam .
  • Such influencing of the beam is avoided in that the valve closure plate with the radially outer region of its outlet-side surface can be supported on an abutment ring concentrically surrounding the ring seat with radial spacing, which is arranged at approximately the same distance from the valve closure plate as the ring seat. This feature is known per se from GB-A-2 136 500.
  • valve closure plate at the points that come into contact with other components of the fuel injector e.g. Surface-hardened, wear is largely prevented despite the good magnetic properties of the valve closure plate forming the armature.
  • Such positions are e.g. the contact surfaces on the ring seat and the contact ring as well as the spherical, radially peripheral edge.
  • the fuel injection valve shown has a valve housing 1, in which a winding body 2 with the magnetic winding 3 is arranged.
  • a soft iron core 4 provided with a through bore 5 extends through the winding body 2 and forms an inlet connection 6 with its one end protruding from the valve housing 1.
  • the other end face of the soft iron core 4 is opposed to form an air gap by a valve closure plate 7 forming an anchor, which has a sealing surface 8 on its side opposite the soft iron core 4.
  • valve closure plate 7 By acting on a compression spring 9 supported on the soft iron core 4, the valve closure plate 7 is urged to bear against an annular seat 10 which projects axially to the valve closure plate 7 and surrounds an outlet 11. At a radial distance, the ring seat 10 is enclosed by a bearing ring 12 which also projects axially from the valve closing plate 7 and which is at a slightly greater distance from the valve closing plate 7 than the ring seat 10.
  • the fuel passes through radial through grooves 13 on the end face of the soft iron core 4 and axial through bores 14 in the valve closure plate 7 into the annular gap which is formed between the annular seat 10 and the contact ring 12.
  • the valve closure plate 7 is lifted from the ring seat 10 against the force of the compression spring 9, the fuel can flow further to the outlet 11 and through it.
  • a plastic covering 19 designed as a disk is arranged on the support surface 18.
  • the valve closure plate 7 is axially movable between the support surface 18 provided with the plastic covering 19 and the ring seat 10.
  • valve closure plate 7 Since the contact ring 12 is located in the radially outer region of the valve closure plate 7, the valve closure plate 7 is lifted off the entire surface of the ring seat 10 even with the slightest opening movement, so that fuel can flow to the outlet 11 from all sides.
  • the pin 15 5 has a fillet-shaped transition 20 to the outlet-side surface of the valve closure plate 7, this transition 20 being formed as a depression in the outlet-side surface of the valve closure plate 7.
  • This fillet-shaped transition 20 leads to a perfect deflection of the fuel into the outlet 11.
  • the pin 15 is formed with such a rotationally symmetrical deflection surface 21 that it reliably causes a specific jet angle and good atomization of the fuel emerging from the outlet 11.
  • the smooth guidance of the valve closure plate 7 in the guide 17 and on the contact ring 12 ensures the uniformity of the fuel flow.

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 (3)

1. Injecteur de carburant à commande électromagnétique pour les dispositifs d'injection pour moteurs à combustion interne, comportant un corps (1) d'injecteur, un noyau (4) en fer doux portant un bobinage (3) d'électro-aimant fixe, disposé à l'intérieur du corps ( 1 ) d'injecteur, et une plaque (7) de fermeture formant un induit, placée en face du noyau et sur le même axe avec formation d'une lame d'air, cette plaque pouvant, sous l'action d'un ressort (9) de compression, venir reposer sur un siège annulaire (10) entourant un orifice (11) de sortie et étant guidée, en pouvant se déplacer axialement, par son bord (16) qui l'entoure radialement contre un organe (17) de guidage qui entoure ce bord de façon correspondante, injecteur caractérisé en ce que la plaque (7) de fermeture présente en saillie coaxiale, transversalement ou dans l'orifice de sortie, un téton (15) comportant un raccordement (20) en forme de gorge creuse, avec la surface située du côté de l'orifice de sortie de la plaque (7) de fermeture, le raccordement (20) formant un renforcement dans la surface, située du côté de l'orifice de sortie, de la plaque (7) de fermeture d'injecteur.
2. Injecteur de carburant selon la revendication 1, caractérisé en ce que la plaque (7) de fermeture d'injecteur comporte une section bombée sur son bord (16) qui l'entoure radialement.
3. Injecteur de carburant selon l'une des revendications précédentes, caractérisé en ce que la plaque (7) de fermeture d'injecteur peut s'appuyer, par une zone située radialement vers l'extérieur de sa surface tournée du côté de l'orifice de sortie, contre une bague (12) d'appui qui entoure concentriquement le siège annulaire (10) en présentant, par rapport à la plaque (7) de fermeture, approximativement la même distance que le siège annulaire (10).
EP85115033A 1984-12-06 1985-11-27 Injecteur de combustible à commande électromagnétique Expired EP0184126B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85115033T ATE33701T1 (de) 1984-12-06 1985-11-27 Electromagnetisch betaetigbares kraftstoffeinspritzventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843444452 DE3444452A1 (de) 1984-12-06 1984-12-06 Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE3444452 1984-12-06

Publications (2)

Publication Number Publication Date
EP0184126A1 EP0184126A1 (fr) 1986-06-11
EP0184126B1 true EP0184126B1 (fr) 1988-04-20

Family

ID=6252015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115033A Expired EP0184126B1 (fr) 1984-12-06 1985-11-27 Injecteur de combustible à commande électromagnétique

Country Status (4)

Country Link
US (1) US4721254A (fr)
EP (1) EP0184126B1 (fr)
AT (1) ATE33701T1 (fr)
DE (2) DE3444452A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3727342A1 (de) * 1987-08-17 1989-03-02 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
IT212429Z2 (it) * 1987-08-25 1989-07-04 Weber Srl Elettrovalvola veloce particolarmente valvola pilota di iniezione del combustibile per motori a ciclo diesel
US5163623A (en) * 1991-05-31 1992-11-17 General Motors Corporation Fuel injector
DE10131199A1 (de) * 2001-06-28 2003-01-16 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE102008040074A1 (de) * 2008-07-02 2010-01-07 Robert Bosch Gmbh Magnetventil zur Steuerung eines Einspritzventils eines Kraftstoff-Injektors
DE102008040068B4 (de) * 2008-07-02 2019-07-18 Robert Bosch Gmbh Konkave Luftspaltbegrenzung bei Magnetventil
DE102016206180A1 (de) * 2016-04-13 2017-10-19 Robert Bosch Gmbh Ventil, insbesondere Saugventil, in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems
DE102017222951A1 (de) * 2017-12-15 2019-06-19 Robert Bosch Gmbh Elektromagnetisch betätigbares Einlassventil und Kraftstoff-Hochdruckpumpe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631612A (en) * 1949-06-25 1953-03-17 Gen Controls Co High-pressure valve
DE1060663B (de) * 1954-04-01 1959-07-02 Caterpillar Tractor Co Einspritzduese fuer Brennkraftmaschinen
US2910249A (en) * 1958-03-19 1959-10-27 Bendix Aviat Corp Solenoid actuated valve for controlling flow to a nozzle
DE2807052A1 (de) * 1978-02-18 1979-08-23 Bosch Gmbh Robert Elektromagnetisches kraftstoff- einspritzventil fuer brennkraftmaschinen
US4384681A (en) * 1978-11-01 1983-05-24 The Bendix Corporation Electromagnetic fuel injector
EP0026060A1 (fr) * 1979-09-20 1981-04-01 LUCAS INDUSTRIES public limited company Injecteur de combustible
DE3012416A1 (de) * 1980-03-29 1981-10-15 Robert Bosch Gmbh, 7000 Stuttgart Einspritzventil
DE3013086A1 (de) * 1980-04-03 1981-10-15 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzventil
DE3118485C2 (de) * 1981-05-09 1986-12-04 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzdüse für Brennkraftmaschinen
GB2136500A (en) * 1983-03-16 1984-09-19 Lucas Ind Plc Electromagnetic fuel injector
GB2144060B (en) * 1983-07-28 1986-04-09 Lucas Ind Plc Electromagnetic valve assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Buch: "Otto-und Dieselmotoren" Dipl. Ing. Heinz Grohe, Vogel-Verlag Würzburg, 5. Auflage 1981, Seiten 109,110 *

Also Published As

Publication number Publication date
ATE33701T1 (de) 1988-05-15
DE3562290D1 (en) 1988-05-26
EP0184126A1 (fr) 1986-06-11
DE3444452A1 (de) 1986-06-12
US4721254A (en) 1988-01-26

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