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EP1402173B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

Info

Publication number
EP1402173B1
EP1402173B1 EP02748592A EP02748592A EP1402173B1 EP 1402173 B1 EP1402173 B1 EP 1402173B1 EP 02748592 A EP02748592 A EP 02748592A EP 02748592 A EP02748592 A EP 02748592A EP 1402173 B1 EP1402173 B1 EP 1402173B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
armature
diaphragm
plunger
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
EP02748592A
Other languages
German (de)
English (en)
Other versions
EP1402173A1 (fr
Inventor
Günter DANTES
Detlef Nowak
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 EP1402173A1 publication Critical patent/EP1402173A1/fr
Application granted granted Critical
Publication of EP1402173B1 publication Critical patent/EP1402173B1/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
    • F02M61/04—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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • 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
    • 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
    • F02M61/047—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 formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices
    • 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
    • Y10T137/86718—Dividing into parallel flow paths with recombining
    • Y10T137/86759—Reciprocating

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • an electromagnetically actuated fuel injection valve in which an armature interacts with an electrically excitable solenoid for electromagnetic actuation and the stroke of the armature is transmitted to a valve closing body via a valve needle.
  • the valve closing body interacts with a valve seat surface to form a sealing seat.
  • Several fuel channels are provided in the anchor.
  • the armature is reset with a return spring.
  • a disadvantage of the fuel injector known from DE 196 26 576 A1 is in particular that the dynamic fuel quantity q dyn flowing through the fuel injector cannot be dosed precisely enough when the valve closing body is lifted from the sealing seat.
  • the ratio of the maximum amount of fuel sprayed to the minimum amount of fuel sprayed q max / q min is relatively small.
  • the characteristic of the fuel injector, which shows the course of the dynamic flow q q dyn depending on the stroke of the valve needle is relatively flat, so that strong fluctuations occur in the dynamic flow.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the fuel flow through the fuel injector is prevented by means of a membrane arranged on an inlet-side end face of the inner pole until the membrane is raised by elastic deformation and at least one opening in the Membrane is released.
  • the resulting fuel flow follows an approximately step-shaped lifting throttle function.
  • the membrane is operatively connected to the armature by a simple construction via a plunger.
  • the individual parts are simple and inexpensive to manufacture.
  • the plunger and the membrane as well as the membrane and the inner pole are advantageously connected to one another by means of weld seams.
  • the plunger is inserted into a blind hole in the armature and is thus easily secured against slipping.
  • the plunger passes through the return spring, which acts on the armature, and the sleeve, which biases the return spring, whereby the arrangement is integrated in the fuel injector in a compact and space-saving manner.
  • the at least one opening is dimensioned so that it does not act as a throttle and thus no stroke throttling occurs.
  • the fuel injector 1 shows an exemplary sectional view of an exemplary embodiment of a fuel injector 1 according to the invention.
  • the fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injection valve 1 consists of a tubular nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an inward opening one Fuel injection valve 1, which has a plurality of spray openings 7.
  • the nozzle body 2 is connected to an outer pole 9 of a magnet coil 10.
  • the magnet coil 10 is wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the magnet coil 10 is excited via a line (not shown further) by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 can be surrounded by a plastic sheath, not shown.
  • the valve needle 3 is non-positively connected to an armature 20 via a flange 14, into which the valve needle 3 is inserted and connected to the valve needle 3 by means of a weld seam 15.
  • the flange 14 can be integrally formed with the armature 20 or welded to it or be glued.
  • a return spring 23 is arranged, which in the present design of the fuel injection valve 1 is preloaded by a sleeve 24.
  • the fuel is fed to the fuel injection valve 1 via a central fuel feed 16. It is passed through a bore 29 in the armature 20, the tubular valve needle 3 and through flow openings 8 in the valve needle 3 to the sealing seat.
  • the fuel injection valve 1 has an elastic membrane 18 on an inlet end 11 of the inner pole 13, which is connected to the inner pole 13, for example, by means of a circumferential weld seam 21. At least one opening 22 is formed in the membrane 18.
  • the membrane 18 is operatively connected to the armature 20 via a plunger 25 which passes through the sleeve 24 and the return spring 23. To secure the plunger 25 against slipping on the armature 20, the plunger 25 is inserted into a blind bore 26 in the armature 20.
  • the pestle 25 can be connected to the membrane 18, for example by means of a weld seam 27.
  • the armature 20 is acted upon by the return spring 23 so that the at least one opening 22 of the membrane 18 is covered by the inner pole 13, since the membrane 18 is flat on the inlet end 11 of the Inner pole 13 rests and the plunger 25, which is operatively connected to the armature 20, is in its rest position, so that the diaphragm 18 is not deformed by the plunger 25.
  • the valve closing body 4 formed on the valve needle 3 is held in sealing contact with the valve seat 6.
  • a working gap 28 formed between the end face 30 of the armature 20 and the inner pole 13 is opened.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the valve needle 3, which is operatively connected to the flange 14 on the armature 20, moves counter to the stroke direction.
  • the plunger 25 returns to its initial position due to the drop of the armature 20 from the inner pole 13 and the pretensioning of the membrane 18 which is non-positively connected to the plunger 25.
  • the at least one opening 22 is again covered by the inner pole 13.
  • FIG. 2 shows a schematic illustration of the flow rate q dyn flowing through the fuel injection valve as a function of the stroke h of the valve needle 3 of the fuel injection valve 1.
  • a characteristic curve which represents the dynamic flow q dyn of fuel through the fuel injection valve as a function of a stroke h of the valve needle 3 can be set or modeled.
  • the measures described can improve the dynamics of the fuel injector 1 and reduce the production costs, since the construction of an anchor free path is eliminated and the minimization of the minimum amount of fuel flowing through the fuel injector 1 is achieved.
  • the at least one opening 22 in the membrane 18 is dimensioned such that it does not act as a throttle, but rather allows an unthrottled fuel flow through the fuel injection valve 1 after its release.
  • the invention is not limited to the illustrated embodiment and z. B. also applicable to fuel injection valves 1 for mixture-compressing, self-igniting internal combustion engines.

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 (10)

  1. Injecteur de carburant (1) comprenant une bobine magnétique (10) qui coopère avec un induit (20) sollicité par un ressort de rappel (23) et qui forme, avec une aiguille de soupape (3), une partie de soupape mobile dans la direction axiale, dans lequel sur l'aiguille de soupape (3), un corps obturateur de soupape (4) forme une portée étanche avec un corps de siège de soupape (5), ainsi qu'un pôle intérieur (13) et un pôle extérieur (9) forment un circuit magnétique avec la bobine magnétique (10),
    caractérisé en ce qu'
    à un côté frontal (11) côté arrivée du pôle intérieur (13), est disposée une membrane (18) qui présente au moins une ouverture (22) pouvant être traversée par le carburant et qui est obturée dans un état fermé de l'injecteur de carburant (1).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la membrane (18) est en liaison active avec l'induit (20) par l'intermédiaire d'un poussoir (25).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    le poussoir (25) est fixé dans un perçage borgne (26) de l'induit (20).
  4. Injecteur de carburant selon la revendication 2 ou 3,
    caractérisé en ce que
    le poussoir (25) est relié à la membrane (18) par action de force.
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    la membrane (18) est reliée au poussoir (25) au moyen d'un joint soudé (27).
  6. Injecteur de carburant selon une des revendications 2 à 5,
    caractérisé en ce que
    le poussoir (25) traverse le ressort de rappel (23) ainsi qu'un manchon (24) qui met le ressort de rappel (23) sous précontrainte.
  7. Injecteur de carburant selon la revendication 6,
    caractérisé en ce que
    le ressort de rappel (23) sollicite l'induit (20) avec une précontrainte.
  8. Injecteur de carburant selon une des revendications 1 à 7,
    caractérisé en ce que
    la membrane (18) est reliée au côté frontal (11) côté arrivée du pôle intérieur (13) au moyen d'un joint soudé périphérique (21).
  9. Injecteur de carburant selon une des revendications 1 à 8,
    caractérisé en ce que,
    dans un état ouvert de l'injecteur de carburant (1), l'au moins une ouverture (22) de la membrane (18) est dégagée par une déformation élastique de la membrane (18) provoquée par le poussoir (25).
  10. Injecteur de carburant selon une des revendications 1 à 9,
    caractérisé en ce que
    l'ouverture (22) de la membrane (18) est obturée par le pôle intérieur (13) dans l'état fermé de l'injecteur de carburant (1).
EP02748592A 2001-06-22 2002-06-18 Soupape d'injection de carburant Expired - Lifetime EP1402173B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10130208A DE10130208A1 (de) 2001-06-22 2001-06-22 Brennstoffeinspritzventil
DE10130208 2001-06-22
PCT/DE2002/002209 WO2003001052A1 (fr) 2001-06-22 2002-06-18 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1402173A1 EP1402173A1 (fr) 2004-03-31
EP1402173B1 true EP1402173B1 (fr) 2004-12-29

Family

ID=7689117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02748592A Expired - Lifetime EP1402173B1 (fr) 2001-06-22 2002-06-18 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6899293B2 (fr)
EP (1) EP1402173B1 (fr)
JP (1) JP4225893B2 (fr)
KR (1) KR20030036713A (fr)
DE (2) DE10130208A1 (fr)
WO (1) WO2003001052A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20040466A1 (it) * 2004-07-23 2004-10-23 Magneti Marelli Holding Spa Iniettore di carburante con attuazione elettromagnetica
EP2246554B1 (fr) * 2009-04-20 2012-06-27 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2375051A1 (fr) * 2010-04-09 2011-10-12 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2936425A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftsoffeinspritzventil
DE3735526C2 (de) * 1986-10-24 1999-01-21 Denso Corp Elektromagnetisches Kraftstoffeinspritzventil
US5353991A (en) * 1989-06-21 1994-10-11 General Motors Corporation Solenoid actuated valve assembly
DE4413217A1 (de) * 1994-04-15 1995-10-19 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
AT1622U1 (de) * 1995-02-28 1997-08-25 Avl Verbrennungskraft Messtech Einspritzsystem mit einem einspritzventil für eine selbstzündende brennkraftmaschine
DE19626576A1 (de) * 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
FR2761114B1 (fr) * 1997-03-24 1999-06-25 Peugeot Motocycles Sa Dispositif d'amortissement d'ondes de pression de carburant reflechies dans un systeme d'injection de carburant
DE19712921A1 (de) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil mit piezoelektrischem oder magnetostriktivem Aktor
DE10120462A1 (de) * 2001-04-26 2002-10-31 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
US6899293B2 (en) 2005-05-31
DE10130208A1 (de) 2003-01-02
JP4225893B2 (ja) 2009-02-18
US20040011899A1 (en) 2004-01-22
DE50201912D1 (de) 2005-02-03
WO2003001052A1 (fr) 2003-01-03
KR20030036713A (ko) 2003-05-09
EP1402173A1 (fr) 2004-03-31
JP2004521253A (ja) 2004-07-15

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