EP1399669A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1399669A1
EP1399669A1 EP02735017A EP02735017A EP1399669A1 EP 1399669 A1 EP1399669 A1 EP 1399669A1 EP 02735017 A EP02735017 A EP 02735017A EP 02735017 A EP02735017 A EP 02735017A EP 1399669 A1 EP1399669 A1 EP 1399669A1
Authority
EP
European Patent Office
Prior art keywords
opening
valve
valve seat
fuel injection
perforated disc
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
EP02735017A
Other languages
German (de)
English (en)
Other versions
EP1399669B1 (fr
Inventor
Martin Maier
Guenter Dantes
Detlef Nowak
Joerg Heyse
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 EP1399669A1 publication Critical patent/EP1399669A1/fr
Application granted granted Critical
Publication of EP1399669B1 publication Critical patent/EP1399669B1/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
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/045—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the combustion chamber
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F02M61/163—Means being injection-valves with helically or spirally shaped grooves
    • 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
    • F02M61/1853—Orifice plates

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • Fuel injection valve in which a valve seat body is provided, wherein a valve closing body arranged on an axially movable valve needle interacts with a valve seat surface of the valve seat body. Upstream of the valve seat surface, a swirl element is arranged in a recess of the valve seat body, which sets the fuel flowing to the valve seat in a circular rotary movement.
  • a stop plate limits the axial path of the valve needle, the stop plate having a central opening which serves to guide the valve needle to a certain extent.
  • Several tangential grooves are made in the swirl element on its lower face, which extend from the outer circumference into a central swirl chamber. Due to the fact that the lower end face of the swirl element rests on the valve seat body, the grooves are present as swirl channels. In the case of this injection valve, too, the size of the spray opening formed in the valve seat body determines the spray geometry, which is why this spray opening must also be shaped very precisely.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that it can be produced inexpensively in a particularly simple manner. It is advantageous to attach the perforated disk provided on the valve seat element very simply and reliably.
  • the perforated disks can be easily and precisely reproduced in large quantities with simple, yet very different opening structures.
  • the perforated disks are components that are very easy to handle in manufacture and fine machining. Since the flow-determining opening cross-section according to the invention also in the perforated disks
  • a diaphragm function is introduced, advantageously no high demands are placed on the dimensional accuracy of the outlet opening of the valve seat element downstream of the valve seat surface. This makes the valve seat element much easier to handle during its manufacture and processing.
  • Valve is adjustable.
  • the perforated disk with a stepped or otherwise cross-sectionally modified opening.
  • the narrowest section of the opening lays then the static flow rate is fixed, while with the remaining length of the opening the spray angle of the sprayed fuel can be influenced in an ideal manner.
  • the perforated disc is produced, for example, by means of galvanic metal deposition, arbitrary opening cross sections can be introduced in the simplest way, as a result of which the beam shaping can be designed to be very variable.
  • the outlet opening of the valve seat element can be adjusted very easily with the exact opening contour of the perforated disc, the static flow rate, the spray angle and the spray shape.
  • FIG. 1 shows a first exemplary embodiment of a fuel injection valve
  • FIG. 2 shows a second example of a fuel injection valve, only the downstream valve end being shown
  • FIG. 3 shows a third example of a fuel injection valve in the same view as FIG. 2.
  • Embodiment shown electromagnetically actuated valve in the form of an injection valve for fuel injection systems of spark-ignition internal combustion engines has one as an inner pole of a magnet coil 1 at least partially surrounded Serving magnetic circuit, tubular, largely hollow cylindrical core 2.
  • the fuel injector is particularly suitable as a high-pressure injector for the direct injection of fuel into a combustion chamber of an internal combustion engine.
  • a tiered one For example, a tiered one
  • Coil body 3 made of plastic 'takes up the winding of the magnetic coil 1 and, in conjunction with the core 2 and an annular, non-magnetic intermediate part 4 with an L-shaped cross section partially surrounded by the magnetic coil 1, enables a particularly compact and short structure of the injection valve in the region the solenoid 1.
  • a continuous longitudinal opening 7 is provided in the core 2 and extends along a longitudinal valve axis 8.
  • the core 2 of the magnetic circuit also serves as a fuel inlet connection, the longitudinal opening 7 representing a fuel supply channel.
  • An outer metallic (for example ferritic) housing part 14 which closes the magnetic circuit as an outer pole or outer guide element, and is firmly connected to the core 2 above the magnet coil 1
  • Magnet coil 1 completely surrounds at least in the circumferential direction.
  • a fuel filter 15 is provided on the inlet side, which ensures that those fuel components are filtered out which, due to their size, cause blockages or blockages in the injection valve
  • the fuel filter 15 is, for. B. fixed by pressing in the core 2.
  • the core 2 forms with the housing part 14 the inlet end of the fuel injector, the upper
  • Housing part 14 for example, seen in the axial direction downstream, just above the magnetic coil 1 extends beyond.
  • a lower tubular housing part 18 connects tightly and firmly, which, for. B. an axially movable valve part consisting of an armature 19 and a rod-shaped valve needle ' l 20 or an elongated valve seat support 21 encloses or receives.
  • the two housing parts 14 and 18 are, for. B. firmly connected to each other with a circumferential weld.
  • Valve seat carrier 21 firmly connected to each other by screwing; Welding, soldering or flanging are also possible joining methods.
  • the sealing between the housing part 18 and the valve seat support 21 is carried out, for. B. by means of a sealing ring 22.
  • the valve seat support 21 has an inner through opening 24 over its entire axial extent, which runs concentrically to the longitudinal axis 8 of the valve.
  • valve seat carrier 21 With its lower end 25, the valve seat carrier 21 surrounds a disk-shaped valve seat element 26 fitted into the passage opening 24 and having a valve seat surface 27 that tapers in the shape of a truncated cone in the downstream direction.
  • B. rod-shaped, a largely circular cross-section valve needle 20 is arranged, which has a valve closing section 28 at its downstream end.
  • This, for example, spherical or partially spherical or rounded or tapered valve closing section 28 interacts in a known manner with the valve seat surface 27 provided in the valve seat element 26. Downstream of the Valve seat surface 27 is introduced in valve seat element 26 at least one outlet opening 32 for the fuel.
  • the injection valve is actuated electromagnetically in a known manner.
  • Actuating element is however also conceivable. Actuation via a controlled pressure-loaded piston is also conceivable.
  • the electromagnetic circuit with the magnet coil 1, the core 2, the housing parts 14 and 18 and the armature serves to axially move the valve needle 20 and thus to open against the spring force of a return spring 33 arranged in the longitudinal opening 7 of the core 2 or to close the injection valve 19.
  • the armature 19 is with the valve closing section 28 facing away from the end of the valve needle 20 z. B. connected by a weld and aligned to the core 2.
  • a guide opening 34 provided in the valve seat carrier 21 at the end facing the armature 19 and on the other hand a disk-shaped guide element 35 with an accurate guide opening 55 arranged upstream of the valve seat element 26 19 is surrounded by the intermediate part 4 during its axial movement.
  • a swirl element 47 is arranged between the guide element 35 and the valve seat element 26, so that all three elements 35, 47 and 26 lie directly on top of one another and are accommodated in the valve seat carrier 21.
  • the three disc-shaped elements 35, 47 and 26 are firmly bonded to one another (weld points or weld seam)
  • the stroke of the valve needle 20 is predetermined by the installation position of the valve seat element 26.
  • An end position of the valve needle 20 is determined when the solenoid 1 is not excited by the contact of the valve closing section 28 on the valve seat surface 27 of the valve seat element 26, while the other end position 'of the valve needle 20 when the solenoid coil " 1 is excited by the contact of the armature 19 on the results in the downstream end face of the core 2.
  • the surfaces of the components in the latter stop area are chromed, for example.
  • Plastic encapsulation 44 can also extend over further components (eg housing parts 14 and 18) of the fuel injector.
  • An electrical connection cable 45 runs out of the plastic encapsulation 44, via which the energization of the magnet coil 1 takes place.
  • FIG. 2 shows a second exemplary embodiment of a fuel injection valve, only the downstream valve end being shown.
  • the guide element 35 has a dimensionally accurate inner guide opening 55 through which the valve needle 20 moves during its axial movement. From the outer circumference, the guide element 35 has a plurality of recesses 56 distributed over the circumference, as a result of which a fuel flow on the outer circumference of the
  • the valve seat element 26 has a circumferential flange 64 which engages under the stro downward end 25 of the valve seat carrier 21.
  • the upper side 65 of the " circumferential flange 64 is ground in one setting with the guide opening 55 and the valve seat surface 27.
  • the three-disc valve body consisting of the elements 35, 47 and 26 is pushed in until the upper side 65 of the flange 64 comes into contact with the end 25 of the Valve seat carrier 21.
  • the valve body is fastened, for example, by a weld seam 61 achieved by means of a laser in the contact area of the two components 21 and 26.
  • the outlet opening 32 is introduced, for example, at an incline to the longitudinal valve axis 8, ending downstream in a protruding spraying area 66.
  • a thin perforated disk 70 with a specific opening structure is provided on the spray area 66 of the valve seat element 26.
  • This perforated disk 70 which is, for example, sunk in a recess 71 of the spray region 66 of the valve seat element 26 on its downstream end face and is flush with this end face, primarily has the function of a flow orifice.
  • the static flow rate is adjusted via the size of the opening 73.
  • the inner opening 73 of the perforated disk 70 has a smaller opening diameter than the outlet opening 32 of the valve seat element 26.
  • the perforated disk 70 is fastened to the valve seat element 26, for example by means of a weld seam 72; Flanging or fastening with a locking ring are also conceivable.
  • the perforated disk 70 is, for example, with its surface normal below one of 90 ° deviating angle to the longitudinal valve axis 8, so that the angle of the inclination of the outlet opening 32 to the longitudinal valve axis 8 corresponds to that of the opening 73 in the tilted perforated disk 70. In this way, the longitudinal axes of the outlet opening 32 and the opening 73 coincide; Exit opening .32 and opening 73 are therefore aligned.
  • the tubular outlet opening 32 formed in the valve seat element 26 has a greater length than the entire length of the opening 73 of the perforated disk 70, the lengths being, for example, in a ratio of 3 to 10: 1, in the exemplary embodiment shown approximately 5: 1.
  • the opening 73 has a continuously cylindrical shape, while in the embodiment according to FIG. 3 a stepped opening 73 is provided.
  • the opening 73 of the perforated disk 70 according to FIG. 3 has a narrower upstream section 75 and a further downstream section 76. At least the narrower section 75 has a smaller opening diameter than the outlet opening 32 of the
  • Valve seat element 26 While the narrower section 75 of the opening 73 defines the static flow rate, the somewhat enlarged section 76 can ideally influence the spray angle of the sprayed fuel.
  • the perforated disks 70 can be produced in a very simple, reproducible manner in large numbers with simple and nevertheless very different opening structures. Since, according to the invention, the flow-determining opening cross-section with a diaphragm function is introduced into the perforated disks 70, high demands on the dimensional accuracy are advantageously not made of the outlet opening 32 of the valve seat element 26 downstream of the valve seat surface 27. Thus, the valve seat member 26 much easier to handle during its manufacture and processing.
  • the perforated disk 70 is ideally so-called galvanic metal deposition, in particular the
  • the exemplary embodiment according to FIG. 3 shows a perforated disk 70 which comprises two layers, one layer each being characterized by a constant inner opening contour 75, 76 which changes in the next layer is.
  • a two-layer perforated disk 70 can be produced, for example, by metal deposition of two layers on top of one another, the two layers then being bonded to one another and ultimately forming a component.
  • shapes of openings 73 can also be produced in the perforated disks 70 which deviate from a circular contour and e.g. are triangular to n-square or shamrock-like, etc. In this way, very different jet shapes can be easily generated with a perforated disk 70 designed in this way.
  • the perforated disks 70 by punching and embossing, eroding or etching.
  • the opening contour can also be inserted very precisely in a steel sheet by means of laser beam drilling, eroding or punching.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant, notamment une soupape d'injection haute pression, pour injection directe de carburant dans une chambre de combustion d'un moteur à combustion interne à allumage commandé, à compression du mélange. Cette soupape d'injection de carburant se caractérise en qu'il est prévu à l'extrémité aval de la soupape, un élément de siège de soupape (26) en aval duquel est connecté un disque perforé (70) servant de limiteur de débit. En amont du siège de soupape (27), il est prévu un élément de torsion (47) permettant d'imprimer un mouvement de rotation induisant la pulvérisation. Dans l'élément de siège de soupape (26), il est prévu en aval du siège de soupape (27) une ouverture de sortie (32) oblongue qui débouche directement dans une ouverture (73) du disque perforé (73) fixé sur l'élément de siège de soupape (26). La largeur de l'ouverture de sortie (32) est supérieure à celle de l'ouverture (73), au moins en son point le plus étroit, de sorte à pouvoir ajuster le débit d'écoulement statique de la soupape au niveau de l'ouverture (73).
EP02735017A 2001-03-31 2002-03-27 Soupape d'injection de carburant Expired - Lifetime EP1399669B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10116186 2001-03-31
DE10116186A DE10116186A1 (de) 2001-03-31 2001-03-31 Brennstoffeinspritzventil
PCT/DE2002/001107 WO2002079637A1 (fr) 2001-03-31 2002-03-27 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1399669A1 true EP1399669A1 (fr) 2004-03-24
EP1399669B1 EP1399669B1 (fr) 2006-04-12

Family

ID=7679963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02735017A Expired - Lifetime EP1399669B1 (fr) 2001-03-31 2002-03-27 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US6869032B2 (fr)
EP (1) EP1399669B1 (fr)
JP (1) JP2004518896A (fr)
KR (1) KR20030007739A (fr)
CZ (1) CZ20023870A3 (fr)
DE (2) DE10116186A1 (fr)
WO (1) WO2002079637A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314670A1 (de) * 2003-04-01 2004-10-14 Robert Bosch Gmbh Verfahren zur Herstellung und Befestigung einer Lochscheibe
JP2006090266A (ja) * 2004-09-27 2006-04-06 Keihin Corp 電磁式燃料噴射弁
CN100392236C (zh) * 2006-06-13 2008-06-04 天津大学 柴油机可调整超高压燃油喷射压力发生系统
US8074625B2 (en) * 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
US9291139B2 (en) * 2008-08-27 2016-03-22 Woodward, Inc. Dual action fuel injection nozzle
DE102008044096A1 (de) * 2008-11-27 2010-06-02 Robert Bosch Gmbh Verfahren zur Herstellung von Drosselbohrungen mit niedrigem Kaviationsumschlagpunkt
DE102010029298A1 (de) * 2010-05-26 2011-12-01 Robert Bosch Gmbh Ventilanordnung zur Dosierung eines fluiden Mediums in einen Abgasstrang einer Brennkraftmaschine
US8528519B2 (en) 2010-10-27 2013-09-10 Mcalister Technologies, Llc Integrated fuel injector igniters suitable for large engine applications and associated methods of use and manufacture
US9309846B2 (en) 2012-11-12 2016-04-12 Mcalister Technologies, Llc Motion modifiers for fuel injection systems
US20140131466A1 (en) 2012-11-12 2014-05-15 Advanced Green Innovations, LLC Hydraulic displacement amplifiers for fuel injectors
CN109418127A (zh) * 2017-08-23 2019-03-05 徐广鑫 一种农用灌溉装置
DE102018218678A1 (de) 2018-10-31 2020-04-30 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil
DE102018221086A1 (de) 2018-12-06 2020-06-10 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

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Publication number Priority date Publication date Assignee Title
KR930004967B1 (ko) 1988-07-13 1993-06-11 가부시기가이샤 히다찌세이사꾸쇼 전자식 연료 분사밸브
DE3943005A1 (de) 1988-12-28 1990-07-05 Hitachi Ltd Elektromagnetische einspritzventilvorrichtung
US4971254A (en) * 1989-11-28 1990-11-20 Siemens-Bendix Automotive Electronics L.P. Thin orifice swirl injector nozzle
DE19607266A1 (de) 1995-03-29 1996-10-02 Bosch Gmbh Robert Lochscheibe, insbesondere für Einspritzventile und Verfahren zur Herstellung einer Lochscheibe
DE19712589C1 (de) * 1997-03-26 1998-06-04 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstoffeinspritzventils
JP3343672B2 (ja) 1997-08-18 2002-11-11 愛三工業株式会社 燃料噴射弁
JPH11117831A (ja) * 1997-10-17 1999-04-27 Toyota Motor Corp 内燃機関用燃料噴射弁
FR2773852B1 (fr) 1998-01-20 2000-03-24 Sagem Injecteur de carburant pour moteur a combustion interne a allumage commande
DE19815789A1 (de) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

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Title
See references of WO02079637A1 *

Also Published As

Publication number Publication date
US20030192965A1 (en) 2003-10-16
DE10116186A1 (de) 2002-10-10
KR20030007739A (ko) 2003-01-23
US6869032B2 (en) 2005-03-22
DE50206394D1 (de) 2006-05-24
CZ20023870A3 (en) 2004-07-14
EP1399669B1 (fr) 2006-04-12
JP2004518896A (ja) 2004-06-24
WO2002079637A1 (fr) 2002-10-10

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