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EP1034369B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1034369B1
EP1034369B1 EP99923396A EP99923396A EP1034369B1 EP 1034369 B1 EP1034369 B1 EP 1034369B1 EP 99923396 A EP99923396 A EP 99923396A EP 99923396 A EP99923396 A EP 99923396A EP 1034369 B1 EP1034369 B1 EP 1034369B1
Authority
EP
European Patent Office
Prior art keywords
valve
closing element
fuel injection
valve seat
regions
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
EP99923396A
Other languages
German (de)
English (en)
Other versions
EP1034369A1 (fr
Inventor
Hubert Stier
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 EP1034369A1 publication Critical patent/EP1034369A1/fr
Application granted granted Critical
Publication of EP1034369B1 publication Critical patent/EP1034369B1/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
    • F02M61/04—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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M51/0667—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 acting as a valve or having a short valve body attached thereto

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • a fuel injector in the form of a Electromagnetically actuated valve from DE-PS 38 31 196 known in which a valve needle from an armature, a tubular connecting part and a spherical one Valve closing body is formed.
  • the connecting part is the armature and the valve closing body connected with each other, being as immediate Closing body carrier serves the connecting part with which the Valve closing body firmly connected by means of a weld seam is.
  • the connecting part has a variety of Flow openings through which fuel from a step out through the inner opening and outside the Connecting part to the valve closing body or to one interacting with the valve closing body Valve seat surface can flow.
  • the fuel injector according to the invention with the characteristic features of the main claim has the Advantage that it is particularly simple is inexpensive to manufacture. Is of particular advantage doing that with very little effort a very precise management of the Valve needle is reached.
  • valve closing body of the lower Guidance of the axially movable valve needle and serves Guide opening on the material areas of the Valve seat body together with the valve seat surface with can be produced very precisely with little effort relatively simple way of accurate guidance of the valve needle (high so-called concentricity of the ball as Valve closing body) reached.
  • the valve closing body serves even the axial guidance of the valve needle, and not as in known valve needles of the closing body carrier. at Such known valve needles have to be complex Guide surfaces are formed on the closing body carrier.
  • the material sections of the End area of the closing body carrier and the Material areas of the valve seat body shaped in this way are that they are at least in a horizontal plane fit exactly into each other.
  • This is a clear one Fixation of position and anti-rotation lock body given in the valve seat body, so that the following downstream Flow areas between the material areas and the Material sections in the circumferential direction a constant size to keep. A beam geometry change over the lifetime the valve is so effectively excluded.
  • the Flow areas are advantageously through Bevels of the side flanks of the material sections of the End area and / or the material areas formed.
  • valve closing body by means of a non-integral joining process, e.g. B. by pressing or flanging on the closing body carrier Fasten. It is advantageous if the end area of the Closing body carrier in the downstream direction still over a spherical equator of the spherical valve closing body protrudes.
  • the closing body carrier can advantageously be used as a Cold pressed part to be executed.
  • FIG. 1 shows it Fuel injector according to the invention
  • Figure 2 a Section along the line II-II in Figure 1
  • Figure 3 a Section along the line III-III in Figure 1.
  • FIG. 1 shows fuel injection valve according to the invention in in the form of an electromagnetically actuated Injector for fuel injection systems from mixture-compressing, spark-ignition internal combustion engines has an inner pole surrounded by a magnetic coil 1 and partially serving as fuel flow largely tubular core 2. Together with an upper, disc-shaped cover 3, the core 2 allows one particularly compact design of the injection valve in the area the magnetic coil 1.
  • the magnetic coil 1 is from an outer, surrounded ferromagnetic valve jacket 5 as the outer pole, the completely surrounds the magnetic coil 1 in the circumferential direction and at its upper end firmly with the cover 3 z. B. is connected by a weld 6.
  • To close the magnetic circuit is the valve jacket 5 on his lower end executed stepped so that a guide section 8th is formed, the similar to the cover 3 Magnetic coil 1 axially encloses and the limitation of Magnetic coil area 1 down or in downstream direction.
  • the guide section 8 of the valve jacket 5, the solenoid 1 and the cover element 3 form an inner, concentric a valve longitudinal axis 10 extending opening 11 or 58, in e.g. an elongated sleeve 12 extends.
  • a inner longitudinal opening 9 of the ferritic sleeve 12 is used partly as a guide opening for one along the Longitudinal valve axis 10 axially movable valve needle 13.
  • Die Sleeve 12 is therefore the inner diameter of the inner opening 9 made to size.
  • the sleeve 12 ends in seen in the downstream direction, for example in the area of the guide section 8 of the valve jacket 5 with which it for example, is firmly connected to a weld seam 54.
  • the sleeve 12 In addition to the axially movable valve needle 13 is also the fixed core 2 in the longitudinal opening 9 of the sleeve 12 arranged.
  • the sleeve 12 In addition to guiding the valve needle 13 or the Receiving the core 2, the sleeve 12 also fulfills one Sealing function, so that a dry one in the injection valve Solenoid 1 is present. This is also achieved in that the disk-shaped cover element 3, the magnet coil 1 completely covered on its upper side.
  • the inner one Opening 58 in the cover element 3 allows the sleeve 12 and thus also the core 2 is extended so that both Components protrude through opening 58 via cover element 3 protrude.
  • valve seat body 14 designed according to the invention of a fixed valve seat surface 15 as a valve seat having.
  • the valve seat body 14 is with a for example generated by a second laser Weld 16 is firmly connected to the valve jacket 5.
  • the Valve needle 13 is supported by a tubular armature 17 and formed a spherical valve closing body 18, wherein the armature 17 serves directly as a closing body support.
  • the tubular anchor 17 is at its downstream, the Spray plate 20 facing end with the spherical Valve closing body 18, for example by crimping connected.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a return spring 25 or closing the injection valve serves the electromagnetic circuit with the magnetic coil 1, the inner core 2, the outer valve jacket 5 and the armature 17.
  • the armature 17 is connected to the valve closing body 18 end facing away from the core 2.
  • the spherical valve closing body 18 interacts with the in the flow direction e.g. frustoconical tapered Valve seat surface 15 of the valve seat body 14 together, the in the axial direction downstream of a guide opening 26 in Valve seat body 14 for guiding the valve closing body 18 is trained.
  • the spray plate 20 has at least one, for example four, by eroding or stamping molded spray ports 27.
  • the insertion depth of the core 2 in the injection valve is below other decisive for the stroke of the valve needle 13.
  • the one end position of the valve needle 13 is not at excited solenoid 1 by the system of Valve closing body 18 on the valve seat surface 15 of the Valve seat body 14 set while the other End position of the valve needle 13 when the solenoid coil 1 is excited by the installation of the armature 17 at the downstream end of the Kerns 2 results.
  • the stroke is adjusted by an axial Moving the core 2 in the sleeve 12, the corresponding the desired position subsequently firmly with the sleeve 12 is connected, whereby a laser welding to achieve a weld 22 is useful.
  • Flow bore 28 of the core 2 which is the supply of the Serves fuel in the direction of the valve seat surface 15 is in addition to the return spring 25, an adjusting sleeve 29 inserted.
  • the adjusting sleeve 29 is used to adjust the Spring preload of the adjoining the adjusting sleeve 29 Return spring 25, which in turn with their opposite side on a shoulder 24 of an inner Longitudinal bore 23 of the armature 17 supports, also a Setting the dynamic spray volume with the Adjustment sleeve 29 takes place.
  • Such an injection valve is characterized by its particularly compact structure.
  • the previously described Components form a pre-assembled, independent assembly, which can be referred to as functional part 30. That done set and assembled functional part 30 has z. Legs upper end face 32, for example two Stick out contact pins 33. About the electrical Contact pins 33 that act as electrical connectors serve, the electrical contacting takes place Magnetic coil 1 and thus its excitation.
  • the inner, graduated due to paragraph 24 Longitudinal bore 23 in armature 17 has a largely circular cross section.
  • the Valve closing body 18 facing end has the inner Longitudinal bore 23 a conical shoulder 45 through which the longitudinal bore 23 extends in the downstream direction and which serves as a stop for the valve closing body 18.
  • An end region extends from the shoulder 45 46 of the armature 17 on the outer circumference of the spherical Valve closing body 18 along, both the shoulder 45 and the end region 46 at least circumferentially are interrupted three times.
  • the spherical valve closing body 18 has one Ball equator running perpendicular to the longitudinal axis 10 of the valve 48 up to or over which the end region 46 extends in the downstream direction. Different so at least one hemisphere is expressed and thus the radius of the spherical valve closing body 18 from Armature 17 encompassed as a closing body carrier.
  • the end area 46 has a larger outer diameter than that Valve closing body 18.
  • the firm connection of e.g. as Cold pressed part present closing body support 17 and Valve closing body 18 is, for example, by flanging or pressing or by pressing and subsequent flanging achieved, especially the encompassing area downstream of the ball equator 48 a secure connection guaranteed.
  • closing body support 17 In addition to the formation of the closing body support 17 as Cold pressed parts also come as a turned part, Sintered part or MIM (Metal Injection Molding) part in question.
  • MIM Metal Injection Molding

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  • 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 (11)

  1. Injecteur de carburant ayant un axe longitudinal, un noyau entouré au moins partiellement par une bobine électromagnétique, une aiguille d'injecteur mobile axialement qui comprend au moins un support d'organe d'obturation et un organe d'obturation de soupape en forme de bille,
    l'organe d'obturation de soupape étant relié solidairement au support d'organe d'obturation et coopérant avec un siège de soupape fixe d'un corps formant siège de soupape, et le support d'organe d'obturation comportant un perçage longitudinal intérieur et une zone d'extrémité en aval,
    caractérisé en ce que
    le corps formant le siège de soupape (14), en amont du siège de soupape (15) comporte sur sa périphérie, une alternance de zones de matière (51) et de cavités (52) réalisées dans la matière.
    la zone d'extrémité (46) du support d'organe d'obturation (17) comporte également des segments de matière (50) et des zones d'ouverture (49) qui alternent sur la périphérie, et
    les segments de matière (50) pénètrent dans les cavités de matière (52) et les zones de matière (51) pénètrent dans les zones d'ouverture (49).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le corps formant le siège de soupape (14) comporte au moins trois zones de matière (51) et cavités de matière (52) et le support d'organe d'obturation (17) comporte dans sa zone d'extrémité (46), au moins trois segments de matière (50) et trois zones d'ouverture (49).
  3. Injecteur selon la revendication 1 ou 2,
    caractérisé en ce que
    l'organe d'obturation de soupape (18) présente un plan équatorial de sphère (48) et dans ce plan, les zones de matière (51) du corps formant siège de soupape (14) sont écartées des segments de matière (50) du support d'organe d'obturation (17).
  4. Injecteur selon la revendication 3,
    caractérisé en ce qu'
    en amont du plan équatorial de la sphère (48), on a un plan parallèle dans lequel au moins un segment de matière (50) du support d'organe d'obturation (17) est ajusté de manière précise dans au moins une cavité de matière (52) du corps formant siège de soupape (14).
  5. Injecteur selon les revendications 3 ou 4,
    caractérisé en ce que
    les flancs latéraux des segments de matière (50) du support d'organe d'obturation (17) et/ou les zones de matières (51) du corps formant le siège de soupape (14) sont inclinés de sorte qu'au moins dans le plan équatorial (48) de la sphère, on obtienne des zones de passage d'écoulement (55) entre les zones de matière (51) et les segments de matière (50).
  6. Injecteur selon l'une des revendications 3 à 5,
    caractérisé en ce que
    le support d'organe d'obturation (17) entoure l'organe d'obturation de soupape (18) avec ses segments de matière (50) de la zone d'extrémité (46) de façon que les segments de matière (50) dépassent le plan équatorial (48) de la sphère de l'organe d'obturation de soupape (18) vers l'aval.
  7. Injecteur selon l'une des revendications précédentes,
    caractérisé en ce que
    l'organe d'obturation (18) est fixé dans la zone d'extrémité (46) du support d'organe d'obturation (17) en étant pressé dans le perçage longitudinal (23) au niveau de la zone d'extrémité (46) du support d'organe d'obturation (17).
  8. Injecteur selon l'une des revendications précédentes,
    caractérisé en ce que
    l'organe d'obturation de soupape (18) est fixé par sertissage dans le perçage longitudinal (23) dans la zone d'extrémité (46) du support de l'organe d'obturation (17).
  9. Injecteur selon l'une des revendications précédentes,
    caractérisé en ce que
    les zones de matière (51) du corps formant siège de soupape (14) délimitent du côté tourné vers l'axe longitudinal (10) de l'injecteur, un orifice de guidage (26) pour guider axialement l'organe d'obturation de soupape (18).
  10. Injecteur selon l'une des revendications précédentes,
    caractérisé en ce que
    le support de l'organe d'obturation (17) est réalisé comme induit.
  11. Injecteur selon l'une des revendications précédentes,
    caractérisé en ce que
    le support d'organe d'obturation (17) est une pièce tournée ou une pièce pressée à froid.
EP99923396A 1998-07-01 1999-03-25 Soupape d'injection de carburant Expired - Lifetime EP1034369B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19829422 1998-07-01
DE19829422A DE19829422A1 (de) 1998-07-01 1998-07-01 Brennstoffeinspritzventil
PCT/DE1999/000879 WO2000001942A1 (fr) 1998-07-01 1999-03-25 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1034369A1 EP1034369A1 (fr) 2000-09-13
EP1034369B1 true EP1034369B1 (fr) 2003-06-04

Family

ID=7872652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99923396A Expired - Lifetime EP1034369B1 (fr) 1998-07-01 1999-03-25 Soupape d'injection de carburant

Country Status (6)

Country Link
EP (1) EP1034369B1 (fr)
JP (1) JP2002519586A (fr)
BR (1) BR9906570A (fr)
DE (2) DE19829422A1 (fr)
ES (1) ES2201717T3 (fr)
WO (1) WO2000001942A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4082929B2 (ja) * 2002-05-21 2008-04-30 株式会社日立製作所 燃料噴射弁
DE102006025343A1 (de) * 2006-03-22 2007-09-27 Robert Bosch Gmbh Magnetspule
JP6216208B2 (ja) 2013-10-22 2017-10-18 日本パーカライジング株式会社 塑性加工用非りん化成処理剤、処理液、化成皮膜及び化成皮膜を有する金属材料

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107956A (en) * 1980-01-30 1981-08-27 Hitachi Ltd Solenoid fuel injection valve
DE3831196A1 (de) 1988-09-14 1990-03-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3939093A1 (de) * 1989-11-25 1991-05-29 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE19503224A1 (de) * 1995-02-02 1996-08-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Einspritzventil für Kraftstoffeinspritzanlagen von Verbrennungsmotoren
DE19712589C1 (de) * 1997-03-26 1998-06-04 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstoffeinspritzventils

Also Published As

Publication number Publication date
BR9906570A (pt) 2000-09-19
DE19829422A1 (de) 2000-01-05
WO2000001942A1 (fr) 2000-01-13
EP1034369A1 (fr) 2000-09-13
DE59905828D1 (de) 2003-07-10
JP2002519586A (ja) 2002-07-02
ES2201717T3 (es) 2004-03-16

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