EP0455758A1 - Injecteur de carburant a commande electromagnetique. - Google Patents

Injecteur de carburant a commande electromagnetique.

Info

Publication number
EP0455758A1
EP0455758A1 EP19900914674 EP90914674A EP0455758A1 EP 0455758 A1 EP0455758 A1 EP 0455758A1 EP 19900914674 EP19900914674 EP 19900914674 EP 90914674 A EP90914674 A EP 90914674A EP 0455758 A1 EP0455758 A1 EP 0455758A1
Authority
EP
European Patent Office
Prior art keywords
valve seat
valve
guide cylinder
fuel injection
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.)
Granted
Application number
EP19900914674
Other languages
German (de)
English (en)
Other versions
EP0455758B1 (fr
Inventor
Max Greiner
Peter Romann
Ferdinand Reiter
Rudolf Babitzka
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 EP0455758A1 publication Critical patent/EP0455758A1/fr
Application granted granted Critical
Publication of EP0455758B1 publication Critical patent/EP0455758B1/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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • a generic fuel injection valve is already known from DE-PS 31 02 642.
  • a guide ring with the guide cylinder and the valve seat on the one hand and a part referred to as a nozzle with an outlet opening for the fuel to be injected on the other hand are separate parts.
  • the guide ring is held in the nozzle with a press fit. This requires high dimensional accuracy of the individual parts and a high installation effort for the fuel injector. Slightly exceeding the dimensional tolerances of these individual parts lead to a deformation of the valve seat during assembly of the fuel injection valve and also to poor concentricity of the guide cylinder to the valve seat and the outlet opening. This results in an increasingly uneven fuel jet image.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that the assembly effort is reduced and the guide cylinder, valve seat and injection opening are exactly aligned with the axis of the valve seat body. This high accuracy is possible within narrow tolerances. A consistently precise response of the fuel injection valve with a constantly precise injection time, exact metering of the fuel with an improved fuel spray pattern is achieved. Further advantageous embodiments of the invention result from the subclaims.
  • FIG. 1 shows the sectional view of the valve seat area of a fuel injection valve
  • FIG. 2 shows the valve seat body of the fuel injection valve as a detail.
  • the fuel injection valve 1 shown in FIG. 1 for a fuel injection system of compression-ignition, spark-ignition internal combustion engines has a valve housing 3 with a through opening 4, in which a valve seat body 5 is fastened by means of a welded connection 6.
  • the valve seat body 5 is provided with a central, bore-like guide cylinder 7. Downstream of the guide Cylinder 7, valve seat body 5 also has a valve seat 8 and, subsequently, at least one outlet opening 9 for fuel injection into an intake manifold of an internal combustion engine.
  • a tubular valve closing member 10 with radial openings 11 projects through the passage opening 4.
  • the valve closing member 10 On the side facing the valve seat 8, the valve closing member 10 carries a valve closing body 12, for example in the form of a hardened ball.
  • the valve closing member 10 On the side facing away from the valve seat 8, the valve closing member 10 carries an armature 15 made of soft magnetic material.
  • the valve closing body 12 projects into the guide cylinder 7 with tight play and, when the fuel injection valve 1 is closed, bears against the valve seat 8.
  • the wall of the guide cylinder 7 is provided with swirl grooves 16 extending obliquely to the axis of the valve closing member 10.
  • a groove 22 runs in a ring shape between the guide cylinder 7 and the valve seat 8 and thus interrupts the transition of the swirl grooves 16 to the valve seat 8.
  • a compression spring 17 acts on the valve closing member 10 in the closing direction.
  • a solenoid 18 is arranged adjacent to the armature 15 in such a way that, as soon as it is excited, the armature 15 lifts against the closing direction.
  • valve seat body 5 shown in FIG. 2 clearly shows the swirl grooves 16 which are inclined to the axis of the valve seat body 5.
  • valve seat 8 and the at least one outlet opening 9 can be seen.
  • special machining accuracy is necessary for the guide cylinder 7, to which the valve seat 8 must be concentric, so that the valve closing member 10 lifts or seals quickly from the valve seat 8 when opening and closing.
  • the friction path between the valve closing member 10 and the valve seat 8 is thereby kept as short as possible.
  • An outer surface 20 of the valve seat body 5 may Guide cylinder 7 may be slightly eccentric, since this does not have a disadvantageous effect due to the length of the valve closing member 10 and the spherical shape of the valve closing body 12.
  • an electrical circuit (not shown) of the magnetic coil 18 is closed.
  • the magnetic forces then effective attract armature 15.
  • the valve closing body 12 of the valve closing member 10 is moved away from the valve seat 8 against the pressure spring 17, so that the fuel passes through the valve closing member 10 and its radial openings 11 through the swirl grooves 16 to the valve seat 8 and downstream to it can reach at least one outlet opening 9 and can be hosed down.
  • the circumferential groove 22 between the guide cylinder 7 and the valve seat 8 enables a more uniform fuel distribution, as a result of which the fuel preparation is additionally improved.
  • the final shape of guide cylinders 7 and / or valve seat 8 and / or the swirl grooves 16 in guide cylinder 7 in valve seat body 5 can be produced in a particularly cost-effective and dimensionally accurate manner.
  • the embossing is carried out in a known manner by means of appropriately designed embossing tools.

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)
  • Magnetically Actuated Valves (AREA)

Abstract

La présente invention crée pour un injecteur de carburant à commande électromagnétique (1) pour moteurs à explosion un agencement très précis de l'orifice de sortie, du siège de soupape et du cylindre de guidage les uns par rapport aux autres, et elle augmente ainsi la précision de fonctionnement et le comportement à l'usure de l'injecteur de carburant par le fait que le corps du siège de soupape (5) comporte en une seule pièce dans une zone intérieure, proche de l'axe, à la fois: le cylindre de guidage (7), le siège de soupape (8) et l'orifice de sortie (9). L'invention convient en particulier aux systèmes d'injection de carburant pour moteurs de véhicules.
EP90914674A 1989-11-25 1990-10-12 Injecteur de carburant a commande electromagnetique Expired - Lifetime EP0455758B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3939093A DE3939093A1 (de) 1989-11-25 1989-11-25 Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE3939093 1989-11-25

Publications (2)

Publication Number Publication Date
EP0455758A1 true EP0455758A1 (fr) 1991-11-13
EP0455758B1 EP0455758B1 (fr) 1994-02-16

Family

ID=6394224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90914674A Expired - Lifetime EP0455758B1 (fr) 1989-11-25 1990-10-12 Injecteur de carburant a commande electromagnetique

Country Status (10)

Country Link
EP (1) EP0455758B1 (fr)
JP (1) JP3167321B2 (fr)
KR (1) KR0172131B1 (fr)
AU (1) AU635785B2 (fr)
BR (1) BR9007081A (fr)
CZ (1) CZ279368B6 (fr)
DE (2) DE3939093A1 (fr)
ES (1) ES2050457T3 (fr)
HU (1) HU209966B (fr)
WO (1) WO1991008392A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4141930B4 (de) * 1991-12-19 2007-02-08 Robert Bosch Gmbh Elektromagnetisch betätigbares Einspritzventil
DE4231448C1 (de) * 1992-09-19 1993-10-21 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE4239110A1 (de) * 1992-11-20 1994-05-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19724091A1 (de) * 1997-06-07 1998-12-10 Bosch Gmbh Robert Ventil
DE19829422A1 (de) * 1998-07-01 2000-01-05 Bosch Gmbh Robert Brennstoffeinspritzventil
US6669166B2 (en) * 2000-07-28 2003-12-30 Nippon Soken, Inc. Electromagnetic valve
DE10049033B4 (de) * 2000-10-04 2005-08-04 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10050752B4 (de) * 2000-10-13 2005-06-02 Robert Bosch Gmbh Brennstoffeinspritzventil mit einem drallerzeugenden Element
DE10050751B4 (de) 2000-10-13 2005-08-11 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10360706A1 (de) 2003-12-19 2005-07-14 Aweco Appliance Systems Gmbh & Co. Kg Ventil und Verfahren zum Herstellen eines Ventils

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1132417A (fr) * 1979-01-29 1982-09-28 Gary L. Casey Injecteur de carburant a commande electromagnetique
US4483485A (en) * 1981-12-11 1984-11-20 Aisan Kogyo kabuskiki Kaisha Electromagnetic fuel injector
US4660770A (en) * 1985-09-25 1987-04-28 United Technologies Diesel Systems, Inc. Electromagnetic fuel injector
KR930004967B1 (ko) * 1988-07-13 1993-06-11 가부시기가이샤 히다찌세이사꾸쇼 전자식 연료 분사밸브
DE3831196A1 (de) * 1988-09-14 1990-03-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3841142C2 (de) * 1988-12-07 1994-09-29 Bosch Gmbh Robert Einspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9108392A1 *

Also Published As

Publication number Publication date
EP0455758B1 (fr) 1994-02-16
CZ583590A3 (en) 1993-06-16
JPH04503097A (ja) 1992-06-04
BR9007081A (pt) 1991-11-26
HUT59739A (en) 1992-06-29
KR0172131B1 (ko) 1999-03-20
ES2050457T3 (es) 1994-05-16
DE59004626D1 (de) 1994-03-24
JP3167321B2 (ja) 2001-05-21
WO1991008392A1 (fr) 1991-06-13
AU6515190A (en) 1991-06-26
CZ279368B6 (cs) 1995-04-12
AU635785B2 (en) 1993-04-01
HU907635D0 (en) 1991-06-28
DE3939093A1 (de) 1991-05-29
HU209966B (en) 1995-01-30
KR920701659A (ko) 1992-08-12

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