EP1042610B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1042610B1
EP1042610B1 EP99924732A EP99924732A EP1042610B1 EP 1042610 B1 EP1042610 B1 EP 1042610B1 EP 99924732 A EP99924732 A EP 99924732A EP 99924732 A EP99924732 A EP 99924732A EP 1042610 B1 EP1042610 B1 EP 1042610B1
Authority
EP
European Patent Office
Prior art keywords
valve
spring
valve seat
fuel injection
closing body
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
EP99924732A
Other languages
German (de)
English (en)
Other versions
EP1042610A1 (fr
Inventor
Michael Mccormick
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 EP1042610A1 publication Critical patent/EP1042610A1/fr
Application granted granted Critical
Publication of EP1042610B1 publication Critical patent/EP1042610B1/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
    • F02M61/16—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
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • DE-PS 40 03 227 is already a fuel injector known that as an electromagnetically actuated Valve with a magnetic circuit and a poppet valve Is provided.
  • This valve is in a Fuel inlet nozzle serving core at its a fuel filter pressed into the inlet end, the Keep dirt particles away from the seating area.
  • an adjustment sleeve in the longitudinal opening of the core and a helical return spring is arranged.
  • the Pressed adjustment sleeve is used to adjust the Spring preload on the return spring applied to it with its downstream end on the valve needle supports and with the magnet coil not excited Valve closing body in the closing direction of the valve against presses a valve seat. So several components are possibly chip-forming in the fuel inlet port attached.
  • a fuel injector for supplying one Internal combustion engine with fuel known to open and close the Valve-closing body in the form of a valve which can be moved axially along a longitudinal axis of the valve has a ball.
  • a valve seat body is provided, the one Valve seat surface is assigned, the valve closing body with the valve seat surface cooperates and with a spring element, which is designed as a guide membrane the valve seat body is connected.
  • the guide membrane is a thin, flat, disc-shaped, largely perpendicular to the valve axis executed on the one hand a force towards the valve seat on the Exercise valve closing body and on the other hand the valve closing body in a radial Direction.
  • the fuel injector according to the invention with the characteristic features of the main claim has the advantage that it is particularly small and compact.
  • a spring element connects the Valve closing body with the valve seat body. Because of the engagement such a spring element can be known from Injectors arranged in the fuel inlet connection Return spring for which there is always an additional one Adjustment element is necessary to be replaced, both components together mostly for a longer design of the injection valve are responsible. In addition, the Component effort can be reduced.
  • valve seat body Guide opening for guiding the valve needle or Shaped valve closing body during its axial movement must be because the spring element guides the valve closing body and pulls exactly into the valve seat body.
  • the spring element as a diaphragm spring execute, which is designed in the form of a sleeve and two Has attachment areas that the valve closing body and partially envelop the valve seat body.
  • the spring element is also designed as a filter element.
  • the one A multitude of holes provided with a diaphragm spring enables one Filter out the tightness of the valve impairing particles from the fuel near the Valve seat.
  • a diaphragm spring with spring and Filter function can be a well-known Injectors arranged in the fuel inlet nozzle Fuel filter as well as the most downstream in the Fuel inlet port or core following return spring as well Adjustment sleeve are replaced, so that the component costs still is more clearly reduced.
  • FIG. 1 shows a partially shown Injection valve with a diaphragm spring according to the invention
  • Figure 2 a diaphragm spring as an individual component according to FIG. 1
  • FIG. 3 a second diaphragm spring in a section of a Injector.
  • the injector has one tubular valve seat support 1, in which concentric to a Longitudinal valve axis 2, a longitudinal opening 3 is formed. In the Longitudinal opening 3 is a z.
  • tubular valve needle 5 arranged at its downstream end 6 with a spherical valve closing body 7 is connected.
  • the injection valve is actuated in a known manner for example electromagnetic.
  • a return spring acting spring element 9 or closing the injection valve serves an indicated electromagnetic circuit with a Solenoid 10, an armature 11 and a core 12.
  • the armature 11 is with the valve closing body 7 facing away from the end Valve needle 5 by z.
  • the core 11 facing away from the end Valve seat support 1 is concentric with the longitudinal axis of the valve 2 extending longitudinal opening 3 through a valve seat body 16 Welding tightly assembled.
  • the Valve seat body 16 On the outer circumference is the Valve seat body 16, for example, stepped, the Scope of the valve seat body 16 at its lower end only has a slightly smaller diameter than the longitudinal opening 3 of the valve seat carrier 1.
  • the Valve closing body 7 facing away, lower end face 17 is the Valve seat body 16 with a bottom part 20 of a z.
  • Pot-shaped spray plate 21 concentric and firmly connected so that the bottom part 20 with its upper End face 22 on the lower end face 17 of the valve seat body 16 is present.
  • the bottom part has 20 of the spray plate 21 at least one, for example four injection openings 25 formed by eroding or stamping on.
  • a circumferential holding edge closes the bottom part 20 26 on the valve seat body 16 in the axial direction extends away and is slightly tapered outwards.
  • the insertion depth of the valve seat body 16 and cup-shaped Spray plate 21 existing valve seat part in the Longitudinal opening 3 determines the default stroke Valve needle 5, since the one end position of the valve needle 5 at non-excited solenoid 10 by the system of Valve closing body 7 on a valve seat surface 29 of the Valve seat body 16 is fixed.
  • the spherical Valve closing body 7 interacts with the flow direction frustoconical tapered valve seat 29 Valve seat body 16 together as a seat valve.
  • the other The end position of the valve needle 5 is when the solenoid 10 is excited for example by the anchor 11 resting against the core 12 established. The path between these two end positions Valve needle 5 thus represents the stroke.
  • valve seat body 16 and spray plate 21 and of Spray plate 21 and valve seat support 1 are required so that the fuel is not between the longitudinal opening 3 of the Valve seat support 1 and the circumference of the valve seat body 16 through to the spray openings 25 or between the Longitudinal opening 3 of the valve seat support 1 and the retaining edge 26 of the Spray plate 21 directly into an intake line the internal combustion engine can flow.
  • the spring element 9 is preferably a membrane spring educated. Between the valve closing body 7 and the Valve seat body 16 extends the diaphragm spring 9, which as sleeve-shaped body is executed.
  • the Diaphragm spring 9 As a single component on an enlarged scale shown so that the construction is clear.
  • the Diaphragm spring fulfills several functions in the injection valve, by acting on the one hand as a return spring that is not in the excited state of the solenoid 10, the valve closing body 7 pulls against the valve seat surface 29, and on the other hand as Filter element acts.
  • a flat raw material e.g.
  • a rolled sheet is used in a first manufacturing step to achieve the diaphragm spring 9 according to the invention a variety of holes 32, for example by means of punching, eroding or Laser drilling introduced. Only then does this become level Raw material in a closed sleeve shape with appropriate Stamp or mandrel tools brought and a desired Spring structure 33 in the form of a fold e.g. by pressing formed.
  • the spring structure 33 is in coordination with the Magnetic circuit sizes introduced in such a way that the spring force when the solenoid 10 is excited by the attraction force on the Valve closing body 7 acts, is easily overcome and at Withdrawal of the excitation of the solenoid 10 a quick The valve closes.
  • the spring structure 33 is, for example, in an axially middle one Introduced area of the diaphragm spring 9, which is in extends in the downstream direction in the shape of a truncated cone. Close on both sides of this central spring area Attachment areas 34, 35, the first Fastening area 34 has a significantly smaller diameter has as the second attachment region 35. With the first Fastening area 34 envelops the diaphragm spring 9 Valve closing body 7, while the second fastening area 35 the valve seat body 16 at least partially on the outer circumference surrounds. Both fastening areas 34, 35 of the diaphragm spring 9 are with the valve closing body 7 and the valve seat body 16 firmly connected, e.g.
  • the second fastening area 35 is, for example, by a Angling from the frustoconical contour of the diaphragm spring 9 executed cylindrical.
  • the diaphragm spring 9 provided with a plurality of holes 32 allows filtering out the tightness of the valve impairing particles from the fuel near the Valve seat 16, 29.
  • the at least 100 or significantly more Holes 32 have a diameter that is no greater than 50 should be up to 60 ⁇ m to the filter function unrestricted to be able to guarantee.
  • valve seat body 16 It is also advantageous that none in the valve seat body 16 exact guide opening for guiding the valve needle 5 or Valve closing body 7 shaped during its axial movement must be because the diaphragm spring 9, the valve closing body 7th leads and pulls exactly into the valve seat body 16.
  • the dynamic spray quantity is set e.g. such that first the diaphragm spring 9 on the valve needle 5th and is specifically attached to the valve closing body 7 (Weld 36).
  • the valve seat part is together with the Valve needle 5 and / or the armature 11 and it attached membrane spring 9 brought into an adjustment station and treated there separately as a valve assembly for the time being.
  • On Test valve head subsequently accommodates this valve assembly, wherein the lower end of the diaphragm spring 9 is held. From below, for example, with the help of a Stepper motor the valve seat part in the axial direction Diaphragm spring 9 moved into it, at the same time Valve energized and the dynamic spray volume measured becomes. As soon as the desired spray volume is reached, can be attached by means of the second weld 37 Diaphragm spring 9 take place on the valve seat body 16.

Claims (8)

  1. Soupape d'injection de carburant pour alimenter un moteur à combustion interne en carburant, ayant
    un axe longitudinal de soupape (2), un organe d'obturation de soupape (7) mobile axialement le long de l'axe longitudinal (2) de la soupape pour ouvrir et fermer la soupape,
    un corps formant siège de soupape (16) auquel est associée une surface formant siège de soupape (29),
    le corps d'obturation de soupape (7) coopérant avec la surface formant siège de soupape (29) et un élément de ressort (9) en forme de ressort-membrane, l'organe d'obturation est relié au corps formant siège de soupape (16),
    caractérisée en ce que
    le ressort-membrane (9) est en forme de manchon et sa zone médiane a une structure de ressort (33).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le ressort-membrane (9) est installé comme ressort de rappel, pour qu'à la fermeture de la soupape il tire l'organe d'obturation de soupape (7) contre la surface formant siège de soupape (29).
  3. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce qu'
    au-dessus de la structure de ressort (33) il y a une première zone de fixation (34) et en dessous de la structure de ressort (33) il y a une seconde zone de fixation (35), la première zone de fixation (34) enveloppant partiellement l'organe d'obturation de soupape (7) et la seconde zone de fixation (35) entourant partiellement l'organe formant siège de soupape (16).
  4. Soupape d'injection de carburant selon la revendication 1 ou la revendication 3,
    caractérisée en ce qu'
    au moins la zone médiane du ressort-membrane (9) s'étend avec la structure de ressort (33) dans la direction aval, en s'élargissant en forme de tronc de cône.
  5. Soupape d'injection de carburant selon l'une des revendications précédentes,
    caractérisée en ce que
    la fixation de l'élément de ressort (9) au corps d'obturation de soupape (7) et au corps formant siège de soupape (16) est assurée par des cordons de soudure (36, 37).
  6. Soupape d'injection de carburant selon l'une des revendications précédentes,
    caractérisée en ce que
    le corps d'obturation de soupape (7) est en forme de bille.
  7. Soupape d'injection de carburant selon l'une des revendications précédentes,
    caractérisée en ce que
    l'élément de ressort (9) est en même temps un élément de filtre pour le carburant.
  8. Soupape d'injection de carburant selon la revendication 7,
    caractérisée en ce que
    l'élément de ressort (9) comporte un ensemble de trous (32) ayant au maximum un diamètre de 60 µm.
EP99924732A 1998-08-07 1999-03-31 Soupape d'injection de carburant Expired - Lifetime EP1042610B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19835693 1998-08-07
DE19835693A DE19835693A1 (de) 1998-08-07 1998-08-07 Brennstoffeinspritzventil
PCT/DE1999/000970 WO2000008333A1 (fr) 1998-08-07 1999-03-31 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1042610A1 EP1042610A1 (fr) 2000-10-11
EP1042610B1 true EP1042610B1 (fr) 2004-08-11

Family

ID=7876758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924732A Expired - Lifetime EP1042610B1 (fr) 1998-08-07 1999-03-31 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6279841B1 (fr)
EP (1) EP1042610B1 (fr)
JP (1) JP2002522695A (fr)
DE (2) DE19835693A1 (fr)
ES (1) ES2226389T3 (fr)
WO (1) WO2000008333A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023322A1 (de) * 2000-05-12 2001-11-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brenkraftmaschinen
US6446885B1 (en) * 2001-01-16 2002-09-10 Robert Bosch Corporation Secondary filter assembly for fuel injector
US6742340B2 (en) 2002-01-29 2004-06-01 Affordable Turbine Power Company, Inc. Fuel injection control system for a turbine engine
DE10213382A1 (de) * 2002-03-26 2003-10-16 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE10256667A1 (de) * 2002-12-04 2004-07-29 Robert Bosch Gmbh Brennstoffeinspritzventil
US7237731B2 (en) * 2003-08-19 2007-07-03 Siemens Vdo Automotive Corporation Fuel injector with a deep pocket seat and method of maintaining spatial orientation
JP2005090233A (ja) * 2003-09-12 2005-04-07 Hitachi Unisia Automotive Ltd 燃料噴射弁
JP2005096377A (ja) * 2003-09-26 2005-04-14 Brother Ind Ltd 印刷装置及び印刷方法
EP1783360B1 (fr) * 2005-11-02 2008-03-26 Delphi Technologies, Inc. Filtre interne pour un injecteur au carburant
DE602007004084D1 (de) * 2007-05-24 2010-02-11 Continental Automotive Gmbh Ventilanordnung für ein Einspritzventil und Einspritzventil
US20090256009A1 (en) * 2008-04-10 2009-10-15 Perry Robert B Protection device for a lower guide system of a fuel injector

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065058A (en) 1976-05-21 1977-12-27 General Motors Corporation Fuel injection nozzle with compressible valve
JPS571807A (en) * 1980-06-04 1982-01-07 Hitachi Ltd Hydraulic servo-valve
DE3139288A1 (de) 1981-10-02 1983-04-21 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3336010A1 (de) 1983-10-04 1985-04-18 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
DE3630092A1 (de) 1986-09-04 1988-03-17 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3714693A1 (de) * 1987-05-02 1988-11-10 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
DE4140070C2 (de) 1991-12-05 1995-08-31 Daimler Benz Ag Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0629266B1 (fr) 1992-03-05 1996-12-18 Siemens Automotive Corporation Injecteur de carburant comportant un filtre interne
DE19638201B4 (de) 1996-09-19 2005-05-04 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
EP1042610A1 (fr) 2000-10-11
DE19835693A1 (de) 2000-02-10
WO2000008333A1 (fr) 2000-02-17
ES2226389T3 (es) 2005-03-16
US6279841B1 (en) 2001-08-28
DE59910198D1 (de) 2004-09-16
JP2002522695A (ja) 2002-07-23

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