EP1395746B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1395746B1
EP1395746B1 EP02740335A EP02740335A EP1395746B1 EP 1395746 B1 EP1395746 B1 EP 1395746B1 EP 02740335 A EP02740335 A EP 02740335A EP 02740335 A EP02740335 A EP 02740335A EP 1395746 B1 EP1395746 B1 EP 1395746B1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injection
injection valve
valve according
abutment sleeve
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
EP02740335A
Other languages
German (de)
English (en)
Other versions
EP1395746A1 (fr
Inventor
Thomas Sebastian
Jens Pohlmann
Guido Pilgram
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 EP1395746A1 publication Critical patent/EP1395746A1/fr
Application granted granted Critical
Publication of EP1395746B1 publication Critical patent/EP1395746B1/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
    • 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
    • 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
    • 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
    • F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means

Definitions

  • the invention relates to a fuel injection valve according to the preamble of the main claim.
  • An electromagnetically operable fuel injection valve is known from EP 0 683 862 B1, whose armature is characterized in that the armature stop surface facing the inner pole is slightly wedge-shaped to the hydraulic damping when opening the fuel injection valve and the hydraulic adhesion force after switching off the magnetic coil exciting current to minimize or completely eliminate. Further, by suitable measures such as vapor deposition and nitriding, the abutment surface of the armature designed wear-resistant, so that the stop surface during the entire life of the fuel injection valve has the same size and the operation of the Brennscherinspritzveptils is not affected.
  • a disadvantage of the fuel injection valve known from the above publication is in particular that although minimized and additionally hardened at the inner pole of the magnetic circuit surface of the armature, but that by the Aüsformung the armature stop surface turbulence and flows when displacing the fuel when tightening the armature occur, on the one hand affect the opening times of the fuel injection valve negative and on the other lead to damage to the armature and the anchor stop surface of the inner pole by hydrodynamic effects.
  • WO 0 025 018 A discloses an electromagnetically actuable fuel injection valve which has a one-piece armature.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that the function of the anchor stop is taken over by an inserted into an outer anchor shell and connected thereto anchor anchor sleeve, so that the main energy of the anchor stop is received by the anchor stop sleeve and not by the anchor coat , The anchor jacket and the anchor stop surface of the inner pole are thus largely protected against damage.
  • the anchor stop sleeve in contrast to the anchor jacket is not made of soft magnetic and therefore only conditionally suitable for continuous running material, but for example, made of a durable hardened metal or a metal alloy or a metal-plastic compound.
  • anchor stop sleeve can be produced in a simple form by turning or deep drawing and can be connected by pressing or welding with the anchor jacket.
  • a drainage device comprising a drainage recess and a bore in the anchor stop sleeve provides Advantageously, for a correct permanent seat of the damping element, which is arranged downstream of the anchor stop sleeve.
  • a fuel injection valve 1 shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is in operative connection with a valve closing body 4, which cooperates with a arranged on a valve seat body 5 valve seat surface 6 to a sealing seat.
  • the fuel injection valve 1 in the exemplary embodiment is an inwardly opening fuel injection valve 1, which has at least one injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the inner pole 13 and the outer pole 9 are separated from each other by a constriction 26 and connected to each other by a non-ferromagnetic connecting member 29.
  • the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
  • the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
  • armature 20 On the other side of the dial 15 is an armature 20. This is connected via a flange 21 frictionally with the valve needle 3 in connection, which is connected by a weld 22 to the flange 21.
  • a return spring 23 On the flange 21, a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by a sleeve 24 to bias.
  • the armature 20 of the fuel injection valve 1 is made in two parts.
  • An outer armature shell 34 is made of a soft magnetic material having the advantage of high magnetic flux.
  • soft magnetic materials have the disadvantage of poor resistance to mechanical wear, so that over time by the operation of the fuel injection valve 1 malfunctions can occur, for example, by changing the armature stroke. The life of a soft magnetic armature 20 is thus limited.
  • the armature 20 is provided with an anchor stop sleeve 35, which is arranged in a recess 37 of the anchor jacket 34.
  • the armature stop sleeve 35 thus takes over the function of the armature guide on the valve needle 3 and the implementation of the fuel on at least one legislativenanschliff 36 and the determination of the anchor stops on the first flange 21, the inlet side of the armature 20 is connected to the valve needle 3 via a weld 22 , and a second flange 31, which is arranged downstream of the armature 20 and also connected via a weld 33 with the valve needle 3.
  • a damping element 32 is additionally provided for damping valve needle bouncers. It may, as in the present embodiment, be designed as an O-ring 32, but also be designed in the form of a membrane.
  • FIGS. 2A to 2C A more detailed description and description of the measures according to the invention can be found in the description of FIGS. 2A to 2C.
  • valve needle guide 14 and the valve seat body 5 are fuel passages 30a and 30b.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injection valve 1 is sealed by a seal 28 against a fuel line, not shown.
  • the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 counter to its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing engagement. Upon energization of the solenoid 10, this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, wherein the stroke through a given in the rest position between the inner pole 12 and the armature 20 working gap 27 is specified.
  • the armature 20 takes the flange 21, which is welded to the valve needle 3, also in the stroke direction with.
  • the valve closing body 4 communicating with the valve needle 3 lifts off from the valve seat surface 6 and the fuel is sprayed off through the injection opening 7.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the standing with the valve needle 3 in connection flange 21 moves against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • FIG. 2A shows in an uncut illustration an overall view of the two-part armature 20 with the second flange 31 and the damping element 32 on the valve needle 3.
  • FIG. 2A illustrates the preassembled overall component, which is inserted into the housing 2 of the fuel injection valve 1.
  • first flange 21 is pushed and welded to the valve needle 3.
  • the two-part armature 20, which consists of the armature jacket 34 and the anchor stop sleeve 35 is also pushed onto the valve needle 3.
  • the formed in the embodiment as an O-ring damping element 32 is pushed either together with the second flange 32 or separately on the valve needle 3 and finally the second flange 32 at a predetermined distance corresponding to the desired stroke of the valve needle 3, also with the valve needle 3 welded.
  • the return spring 23 is supported on the first flange 21, not shown in FIG. 2A, which rests against the armature stop sleeve 35 which terminates flush with an inlet-side end face 38 of the anchor jacket 34.
  • An outflow-side end 39 of the armature stop sleeve 35 is supported on the prestressed damping element 32, which rests on the second flange 31.
  • FIG. 2B shows, in an excerpted sectional view, a section through the armature jacket 34 and the anchor stop sleeve 35.
  • three surface contours 36 are clearly recognizable, which take over the passage of the fuel through the armature 20.
  • separate holes in the armature jacket 34 which can affect the stability and symmetry of the soft-magnetic anchor jacket 34, can be avoided.
  • the foundednanschliffe 36 can be attached to this already in the manufacture of the anchor stop sleeve 35.
  • the anchor stop sleeve 35 is preferably inexpensive to produce by turning or by deep drawing.
  • FIG. 2C shows an excerpt from a section from FIG. 1 in the area IIC or a true-to-scale section through the overall component shown in FIG. 2A.
  • the anchor stop sleeve 35 is stepped in order to ensure the correct assembly of the anchor jacket 34 and the anchor stop sleeve 35.
  • a drainage recess 40 of the anchor stop sleeve 35 is shown with a bore 41, the fuel, which collects during operation of the fuel injection valve 1 by a pumping action in a recess 42 of the anchor stop sleeve 35 between this and the valve needle 3, in a Interior 42 of the fuel injection valve 1 dissipates. This can ensure that the damping element 32 remains in its position and is not displaced by the fuel pressure, which can lead to malfunction of the fuel injection valve 1.
  • the invention is not limited to the illustrated embodiments and z. B. for others.

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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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (14)

  1. Injecteur de carburant (1) pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne, munie d'une aiguille de soupape (3) coopérant avec un obturateur de soupape (4) qui forme un siège d'étanchéité avec une surface de siège de soupape (6) et d'un induit (20) axialement mobile sur l'aiguille de soupape (3) et qui coopère avec une bobine électromagnétique (10),
    caractérisé en ce que
    l'induit (20) comprend une enveloppe d'induit (24) et une douille de butée d'induit (35), cette dernière étant amenée par complémentarité de forme dans un évidement intérieur (37) de l'enveloppe d'induit (34) et venant buter contre au moins une bride (21, 31) reliée par liaison de force à l'aiguille de soupape.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'enveloppe d'induit (34) est fabriquée à partir d'un matériau magnétique doux.
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    la douille de butée d'induit (35) se compose d'un matériau se différenciant de celui de l'enveloppe d'induit (34).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    la douille de butée d'induit (35) est fabriquée à partir d'un métal durci ou d'un alliage de métal durci.
  5. Injecteur de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisée en ce que
    la douille de butée d'induit (35) est enfoncée dans l'enveloppe d'induit (34).
  6. Injecteur de carburant selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    la douille de butée d'induit (35) est soudée à l'enveloppe d'induit (34).
  7. Injecteur de carburant selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    la douille de butée d'induit (35) assure la fermeture en étant reliée à l'enveloppe d'induit (34) sur une face frontale d'entrée (38).
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce qu'
    une première bride (21) reliée par liaison de force à l'aiguille de soupape (3) par une soudure (22) s'appuie contre la face frontale d'entrée (38) de la douille de butée d'induit (35).
  9. Injecteur de carburant selon la revendication 8,
    caractérisé en ce qu'
    un ressort de rappel (23) s'appuie contre la face opposée à la douille de butée d'induit (35) de la première bride (21).
  10. Injecteur de carburant selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que
    la douille de butée d'induit (35) a une extrémité côté écoulement qui s'appuie contre un élément d'amortissement (32).
  11. Injecteur de carburant selon la revendication 10,
    caractérisé en ce que
    l'élément amortisseur (32) s'appuie contre une deuxième bride (31) reliée par liaison de force à l'aiguille de soupape (3) à l'aide d'une soudure (33).
  12. Injecteur de carburant selon l'une quelconque des revendications 1 à 11,
    caractérisé en ce qu'
    au moins un affûtage de surface (36) est prévu sur la douille de butée d'induit (35).
  13. Injecteur de carburant selon l'une quelconque des revendications 1 à 12,
    caractérisé en ce qu'
    un évidement de drainage (40) est prévu dans la douille de butée d'induit (35).
  14. Injecteur de carburant selon la revendication 13,
    caractérisé en ce que
    l'évidement de drainage (40) conduit dans une chambre intérieure (42) de l'injecteur de carburant (1) via un alésage (41).
EP02740335A 2001-05-21 2002-05-10 Soupape d'injection de carburant Expired - Lifetime EP1395746B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124743A DE10124743A1 (de) 2001-05-21 2001-05-21 Brennstoffeinspritzventil
DE10124743 2001-05-21
PCT/DE2002/001691 WO2002095215A1 (fr) 2001-05-21 2002-05-10 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1395746A1 EP1395746A1 (fr) 2004-03-10
EP1395746B1 true EP1395746B1 (fr) 2006-04-05

Family

ID=7685598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740335A Expired - Lifetime EP1395746B1 (fr) 2001-05-21 2002-05-10 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US20040026541A1 (fr)
EP (1) EP1395746B1 (fr)
JP (1) JP2004519619A (fr)
CN (1) CN1463326A (fr)
DE (2) DE10124743A1 (fr)
WO (1) WO2002095215A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10208224A1 (de) 2002-02-26 2003-09-11 Bosch Gmbh Robert Brennstoffeinspritzventil
EP2295785B1 (fr) * 2009-07-29 2012-04-04 Delphi Technologies Holding S.à.r.l. Injecteur de carburant
DE102012202253A1 (de) * 2012-02-15 2013-08-22 Robert Bosch Gmbh Brennstoffeinspritzventil
EP2852753B1 (fr) 2012-05-08 2019-07-17 CPT Group GmbH Boîtier de soupape destiné à une soupape d'injection et soupape d'injection
EP2851551B1 (fr) * 2013-09-20 2016-05-25 Continental Automotive GmbH Soupape d'injection de fluide
EP3076004B1 (fr) * 2015-04-02 2018-09-12 Continental Automotive GmbH Ensemble de soupape avec un élément de retenue de particules et soupape de fluide
CN109154261B (zh) * 2016-06-02 2021-06-08 大陆汽车有限公司 用于喷射阀的阀组件以及喷射阀
DE102018200364A1 (de) * 2018-01-11 2019-07-11 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102020213354A1 (de) * 2020-10-22 2022-04-28 Robert Bosch Gesellschaft mit beschränkter Haftung Brennstoffeinspritzventil
GB2613392B (en) * 2021-12-02 2024-04-03 Phinia Delphi Luxembourg Sarl Fuel pump

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT63654B (de) * 1910-11-10 1914-02-25 Josef Arak Holzkohlenplätteisen.
DE1156602B (de) * 1959-06-26 1963-10-31 Bosch Gmbh Robert Einspritzventil
DE3314899A1 (de) * 1983-04-25 1984-10-25 Mesenich, Gerhard, Dipl.-Ing., 4630 Bochum Federanordnung mit zusatzmasse zur verbesserung des dynamischen verhaltens von elektromagnetsystemen
US5088467A (en) * 1984-03-05 1992-02-18 Coltec Industries Inc Electromagnetic injection valve
US5114077A (en) * 1990-12-12 1992-05-19 Siemens Automotive L.P. Fuel injector end cap
US5299776A (en) * 1993-03-26 1994-04-05 Siemens Automotive L.P. Impact dampened armature and needle valve assembly
RU2131549C1 (ru) * 1993-12-09 1999-06-10 Роберт Бош Гмбх Электромагнитный клапан
US5667194A (en) * 1995-12-11 1997-09-16 Siemens Automotive Corporation Armature needle valve assembly having plastic connecting means
DE19710891A1 (de) * 1997-03-15 1998-09-17 Bosch Gmbh Robert Druckventil
DE19816315A1 (de) * 1998-04-11 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19833461A1 (de) * 1998-07-24 2000-01-27 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
DE19849210A1 (de) * 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
US6056264A (en) * 1998-11-19 2000-05-02 Cummins Engine Company, Inc. Solenoid actuated flow control valve assembly
DE19948238A1 (de) * 1999-10-07 2001-04-19 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19950761A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE50206318D1 (de) 2006-05-18
JP2004519619A (ja) 2004-07-02
US20040026541A1 (en) 2004-02-12
EP1395746A1 (fr) 2004-03-10
DE10124743A1 (de) 2002-11-28
WO2002095215A1 (fr) 2002-11-28
CN1463326A (zh) 2003-12-24

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