EP0184124A1 - Injecteur de combustible à commande électromagnétique - Google Patents

Injecteur de combustible à commande électromagnétique Download PDF

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Publication number
EP0184124A1
EP0184124A1 EP85115031A EP85115031A EP0184124A1 EP 0184124 A1 EP0184124 A1 EP 0184124A1 EP 85115031 A EP85115031 A EP 85115031A EP 85115031 A EP85115031 A EP 85115031A EP 0184124 A1 EP0184124 A1 EP 0184124A1
Authority
EP
European Patent Office
Prior art keywords
deformation
sleeve
fuel injection
injection valve
compression spring
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
EP85115031A
Other languages
German (de)
English (en)
Other versions
EP0184124B1 (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 AT85115031T priority Critical patent/ATE42992T1/de
Publication of EP0184124A1 publication Critical patent/EP0184124A1/fr
Application granted granted Critical
Publication of EP0184124B1 publication Critical patent/EP0184124B1/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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49861—Sizing mating parts during final positional association

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 magnetic winding, and an armature which is coaxial with it and forms an air gap and which is connected to a valve closure member
  • Valve closure member forms, with a through bore leading from an inlet through the soft iron core to the valve closure member, in which a compression spring is arranged and supported at one end, the other end of which is in contact with the armature with a certain preload.
  • This training is not only complex to manufacture, but also requires a large number of components.
  • loosening the stop screw can adjust it and thus the preload force of the compression spring.
  • the object of the invention is therefore to provide a fuel injection valve according to the preamble, which allows simple and safe adjustment of the biasing force of the compression spring with a few simple components.
  • the compression spring is supported by an axially plastically deformable support element in the through hole, the deformation resistance is greater than the force of the predetermined bias of the compression spring.
  • this design requires only a simple component, which can be reduced to such a length by axial plastic deformation that the prestress of the compression spring is given the desired value. The value once set is then retained and cannot change due to vibrations during the operation of the fuel injector.
  • the through is a stepped bore which forms an annular shoulder at the transition from the step of the larger diameter to the valve closure member facing the step, on which the support element can be supported.
  • the support element is preferably a sleeve.
  • This sleeve can have deformation elements that can be supported in the through bore, the deformation elements being formed by a radially circumferential deformation flange protruding from one end of the sleeve.
  • the deformation flange is bent and the cylindrical part of the sleeve is axially displaced.
  • the deformation elements can be supported with their radially outer free end in the through hole and can be freely moved axially with their radially inner region. If a deformation force can be applied to the sleeve in the end region of its cylindrical wall, an axially correct introduction of force into the dimensionally stable cylindrical part of the sleeve takes place without the contact area of the compression spring being deformed.
  • the deformation elements can be formed by a deformation bellows formed at one end of the sleeve coaxial to the sleeve.
  • the transition of the sleeve to the deformation bellows can be designed as a force application flange that can be acted upon by a deformation force. If the bellows has an axially directed cross-section which extends from the area of the sleeve and extends to the end of the bellows opposite the sleeve, then a T-shaped component can be inserted freely from the inlet into the area of the sleeve and after one on closing 90 C rotation around its longitudinal axis, engage behind the force application flange. By pulling the T-shaped component, the deformation bellows undergo axial plastic deformation until the compression spring has the desired pretensioning force.
  • This design has the advantage that the pretensioning force can be adjusted on the fully assembled fuel injector under operating conditions with little effort.
  • the sleeve preferably has a radially circumferential support flange on which the compression spring can be supported.
  • the only component that is designed as a sleeve and that is required for prestressing can be produced in a simple manner as a one-piece drawn part.
  • 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.
  • the other end face of the soft iron core 4 is opposed by an air gap to form an armature 7, which is designed as a closure plate and has a coaxially extending atomizing pin 8 on its side opposite the soft iron core 4.
  • the atomizing pin 8 projects into an outlet bore 9.
  • the armature 7 is acted upon in the closing direction by a prestressed compression spring 10 supported on the soft iron core 4.
  • the compression spring 10 is supported via a support element 12 or 13, which rests with its end opposite the compression spring 10 against an annular shoulder 11 of the through bore 5.
  • the annular shoulder 11 is formed by the transition from the step of the larger diameter facing the valve closure member to the step of smaller diameter of the through-hole 5 designed as a stepped bore.
  • the support element 12 shown in FIGS. 1 to 3 is a sleeve 14 which has at one end a radially outwardly directed, circumferential support flange 15 points on which the compression spring 10 is supported.
  • the sleeve 14 also has a circumferential deformation flange 16 which is also directed radially outwards.
  • This deformation flange 16 has an outer diameter which corresponds approximately to the diameter of the large step of the through bore 5.
  • the deformation flange 16 rests only on the annular shoulder 11 with its radially outer region. With its radially inner area, the deformation flange 16 can be moved axially freely. As a result, axial pressurization of the sleeve 14 by means of a deformation tube 17 and the resulting plastic deformation of the deformation flange 16 from its straight radial shape - as shown in FIG. 2 - into an inclined shape - as shown in FIG. 3 - axially displaced will.
  • This biasing force can be measured on a pressure measuring plate 18 during the deformation process, so that the pressurization and deformation by the deformation tube 17 is terminated at the moment when the desired biasing force of the compression spring 10 is reached.
  • the annular pressure plate 18 lies against the end of the compression spring 10 opposite the support element 12.
  • the support element 13 shown in FIGS. 4-6 also has a sleeve 14 which radially follows one has internally directed support flange 15 on which the compression spring 10 is in contact.
  • the sleeve 14 has a radially inwardly directed force application flange 19, which at its radially inner region merges into a deformation bellows 20 which is directed coaxially away from the sleeve 14.
  • a transverse slot 21 extends axially into the region of the sleeve 14.
  • the cross piece 22 of which has a greater extension than the inside diameter of the deformation bellows 20, through which Through hole 5 are inserted into the area of the sleeve 14.
  • the crosspiece 22 engages behind the force application flange 19, so that by pulling the T-shaped component 23 outwards, the deformation bellows 20 is axially compressed until the pretension of the compression spring 10 is reduced to the desired value.
  • this is preferably carried out on the completely assembled fuel injection valve by measuring the dynamic flow rate.
  • the deformation resistance of the support elements 12 and 13 is significantly greater than the biasing force of the compression spring 10, so that no deformation is possible by the compression spring 10.
  • the inventive design of the fuel injector allows the compression spring 10 and the ring shoulder ter 11 need to be produced with only relatively low accuracy, since these inaccuracies are compensated for by the deformation of the support element 12 or 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP85115031A 1984-12-06 1985-11-27 Injecteur de combustible à commande électromagnétique Expired EP0184124B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85115031T ATE42992T1 (de) 1984-12-06 1985-11-27 Elektromagnetisch betaetigbares kraftstoffeinspritzventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843444451 DE3444451A1 (de) 1984-12-06 1984-12-06 Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE3444451 1984-12-06

Publications (2)

Publication Number Publication Date
EP0184124A1 true EP0184124A1 (fr) 1986-06-11
EP0184124B1 EP0184124B1 (fr) 1989-05-10

Family

ID=6252014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115031A Expired EP0184124B1 (fr) 1984-12-06 1985-11-27 Injecteur de combustible à commande électromagnétique

Country Status (4)

Country Link
US (1) US4646975A (fr)
EP (1) EP0184124B1 (fr)
AT (1) ATE42992T1 (fr)
DE (2) DE3444451A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388494A1 (fr) * 1989-03-22 1990-09-26 Siemens Aktiengesellschaft Procédé pour ajuster la tension d'un élément elastique dans un injecteur électromagnétique
EP0785558A3 (fr) * 1996-01-16 1997-11-19 Saturn Electronics & Engineering, Inc. Vanne électromagnétique proportionnelle avec force de commande variable
EP2149699A1 (fr) 2008-07-29 2010-02-03 Continental Automotive GmbH Injecteur à carburant

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723698C2 (de) * 1987-07-17 1995-04-27 Bosch Gmbh Robert Kraftstoffeinspritzventil sowie Verfahren zu dessen Einstellung
DE3840339A1 (de) * 1988-11-30 1990-05-31 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4037952A1 (de) * 1990-11-29 1992-06-04 Bosch Gmbh Robert Verfahren zur montage eines filters an einem ventil und ventil
US5205492A (en) * 1991-12-16 1993-04-27 Gregory Khinchuk Fuel injection valve
US5392995A (en) * 1994-03-07 1995-02-28 General Motors Corporation Fuel injector calibration through directed leakage flux
DE4443137A1 (de) * 1994-12-03 1996-06-05 Bosch Gmbh Robert Verfahren zur Ermittlung der Federkraft einer Schließfeder beim Öffnen eines Ventiles, insbesondere eines Brennstoffeinspritzventiles, und Vorrichtung zur Durchführung des Verfahrens
IT1295192B1 (it) * 1997-09-24 1999-05-04 Magneti Marelli Spa Iniettore elettromagnetico.
US6409145B1 (en) * 2000-02-28 2002-06-25 Delphi Technologies, Inc. Plunger assembly having a preset spring force pre-load

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127146A5 (fr) * 1971-02-25 1972-10-13 Brev Etudes Sibe
GB2061014A (en) * 1979-10-05 1981-05-07 Weber Spa An electromagnetically actuated injector for internal combustion engines
GB2062092A (en) * 1979-10-19 1981-05-20 Weber Spa Electromagnetically actuated fuel injection valve for internal-combustion engines
EP0117603A1 (fr) * 1983-01-14 1984-09-05 Tohoku Mikuni Kogyo Kabushiki Kaisha Soupape d'injection de carburant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107895A (en) * 1958-09-11 1963-10-22 Sulzer Ag Valve seat construction
DE1242411B (de) * 1965-01-22 1967-06-15 Bosch Gmbh Robert Verfahren zum Einstellen der Federvorspannung bei Unterdruckzuendverstellern fuer Brennkraftmaschinen
US3662761A (en) * 1970-03-23 1972-05-16 Amp Inc Valve structure with a u-shaped spring retainer
US3880605A (en) * 1973-07-16 1975-04-29 Gillette Co Manufacture gas propelled dispensers
DE3040529C2 (de) * 1980-10-28 1984-08-16 Hans Hermes Steuerungstechnik, 6981 Faulbach Sicherheitsventil
DE3108952A1 (de) * 1981-03-10 1982-09-23 Hans Sasserath & Co Kg, 4052 Korschenbroich Sicherheitsventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127146A5 (fr) * 1971-02-25 1972-10-13 Brev Etudes Sibe
GB2061014A (en) * 1979-10-05 1981-05-07 Weber Spa An electromagnetically actuated injector for internal combustion engines
GB2062092A (en) * 1979-10-19 1981-05-20 Weber Spa Electromagnetically actuated fuel injection valve for internal-combustion engines
EP0117603A1 (fr) * 1983-01-14 1984-09-05 Tohoku Mikuni Kogyo Kabushiki Kaisha Soupape d'injection de carburant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388494A1 (fr) * 1989-03-22 1990-09-26 Siemens Aktiengesellschaft Procédé pour ajuster la tension d'un élément elastique dans un injecteur électromagnétique
EP0785558A3 (fr) * 1996-01-16 1997-11-19 Saturn Electronics & Engineering, Inc. Vanne électromagnétique proportionnelle avec force de commande variable
US5996628A (en) * 1996-01-16 1999-12-07 Saturn Electronics & Engineering, Inc. Proportional variable force solenoid control valve
EP2149699A1 (fr) 2008-07-29 2010-02-03 Continental Automotive GmbH Injecteur à carburant
US8695899B2 (en) 2008-07-29 2014-04-15 Continental Automotive Gmbh Fuel injector

Also Published As

Publication number Publication date
DE3444451A1 (de) 1986-06-19
ATE42992T1 (de) 1989-05-15
US4646975A (en) 1987-03-03
EP0184124B1 (fr) 1989-05-10
DE3570105D1 (en) 1989-06-15

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