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EP1328722A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1328722A1
EP1328722A1 EP01986748A EP01986748A EP1328722A1 EP 1328722 A1 EP1328722 A1 EP 1328722A1 EP 01986748 A EP01986748 A EP 01986748A EP 01986748 A EP01986748 A EP 01986748A EP 1328722 A1 EP1328722 A1 EP 1328722A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
valve seat
seat body
fuel
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.)
Withdrawn
Application number
EP01986748A
Other languages
German (de)
English (en)
Inventor
Thomas Sebastian
Jens Pohlmann
Martin Maier
Guenter Dantes
Detlef Nowak
Joerg Heyse
Joerg Schlerfer
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 EP1328722A1 publication Critical patent/EP1328722A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • F02M61/18—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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • Fuel injection valves in which swirl-generating elements are incorporated in a valve seat body are known, for example, from DE 41 31 499 Cl.
  • the swirl-generating element is designed in the form of grooves which are introduced into the valve seat body and open at an injection opening.
  • the amount of fuel to be sprayed is metered through the cross section of the spray opening. This is arranged either in the valve seat body or in a perforated disk arranged at the downstream end of the fuel injector.
  • the swirl-generating elements are located upstream of the sealing seat and are introduced as grooves in a central recess in the valve seat body, which serves as a guide for the valve closing body.
  • the swirl grooves open towards the center axis of the fuel injection valve become channels through the valve closing body, which is preferably spherical closed. This defines a cross section within the swirl channels through which the fuel is metered.
  • a disadvantage of the fuel injector known from DE 41 31 499 Cl is the arrangement of the swirl generation downstream of the sealing seat.
  • the robustness of the swirl-generating elements which limits the design options of the component, since e.g. B. Minimum requirements for material thickness must be met.
  • a pre-jet is also formed which has no swirl.
  • the resulting poor atomization leads to poor combustion.
  • the fuel injector according to the invention with the characterizing feature of the main claim has the advantage that the swirling fuel flow reaches the spray opening without a strong deflection.
  • the swirl-generating elements are arranged protected upstream of the sealing seat.
  • the decoupling of the swirl generation from the metering of the fuel to be sprayed is also advantageous for production.
  • the dimensional tolerances of the swirl-generating elements can be selected relatively roughly, which enables the use of inexpensive manufacturing processes.
  • the metering quantity is also set while maintaining the unchanged valve seat body, by changing an annular gap which is generated by a shoulder in the valve closing body.
  • changing the contour of the shoulder can influence the opening and closing behavior.
  • Another advantage of this is that there is no dead volume downstream of the swirl generation. The formation of a swirl in the fuel flow thus already occurs during the opening process of the fuel injector.
  • FIG. 1 is a schematic partial section through an embodiment of a fuel injector according to the invention.
  • FIG. 2 shows a schematic partial section in section II of FIG. 1 of the exemplary embodiment of a fuel injector according to the invention.
  • FIG. 3 shows a schematic section along the line III-III in FIG. 2.
  • the fuel injector 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited
  • Fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
  • the fuel injection valve 1 comprises a 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 electromagnetically actuated fuel injection valve 1, which has an injection opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole of a solenoid 10.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the Inner pole 13 and outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
  • valve needle 3 is guided in a disk-shaped valve needle guide 14. This is one
  • Valve needle stroke serves. On the upstream side of the
  • Adjustment disc 15 is an anchor 20. This is non-positively connected to the valve needle 3 via a flange 21, which is connected to the valve needle by a weld 22
  • Flange 21 is connected. On the flange 21, a return spring 23 is supported, which in the present
  • Inner pole 13 pressed sleeve 24 is brought to bias.
  • Fuel channels 30a, 30b run in the valve needle guide 14 and in the armature 20.
  • a filter element 25 is arranged in a central fuel feed 16.
  • 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 against the stroke direction via the flange 21 on the valve needle 3 in such a way that the valve closing body 4 is held in sealing contact with the valve seat surface 6.
  • the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 13 and the armature 20.
  • the armature 20 takes the flange 21, which is welded to the valve needle 2, and thus also the valve needle 3 Stroke direction with.
  • the valve closing body 4, which is operatively connected to the valve needle 3, lifts off the valve seat surface 6, and the fuel reaching the spray opening 7 via swirl channels 36 and a subsequent annular gap 37 is sprayed off.
  • the swirl-generating assembly consists of the valve seat body 5, the valve needle 3 and the valve closing body 4 which is operatively connected to the valve needle 3.
  • valve seat body 5 On its upstream side 33, the valve seat body 5 has a guide recess 38 which serves to guide the valve needle 3 in the axial direction.
  • a preferably conical taper follows on which valve seat surface 6 is arranged.
  • the spray opening 7 follows downstream of the taper.
  • Swirl channels 36 are introduced into the valve seat body 5 on the upstream side 33 of the valve seat body 5. They are open to the upstream surface 33 of the valve seat body 5 and preferably open tangentially into the guide recess 38.
  • the swirl channels are designed as grooves in the valve seat body 5.
  • the bottom 39 of the grooves forms the downstream boundary surface of the swirl channels 36 and is preferably arranged on a conical jacket, the opening angle ⁇ of which is identical to the opening angle ⁇ which the conical valve seat surface 6 encloses with the central axis 35 of the fuel injection valve 1.
  • the valve needle 3 has upstream of the upstream surface 33 of the valve seat body 5 a radial extension 31, so that the upstream open swirl channels 36 are at least partially covered in the radial direction.
  • the axial flow fraction of the fuel can thus be varied when the fuel injection valve 1 is open.
  • the extent of the radial enlargement 31 is smaller than the inside diameter of the nozzle body 2.
  • the changes in the axial component of the fuel flow during the opening and closing of the fuel injection valve 1 can, for. B. can be influenced by a conical or funnel-shaped design of the upstream surface 33 of the valve seat body 5. An influence by the corresponding surface 32 of the radial extension 31 is also possible.
  • the valve closing body 4 connected to the valve needle 3 has a radial extent which is smaller than the guide recess 38 of the valve seat body 5.
  • the cross-sectional area of the annular gap 37 thus formed between the valve closing body 4 and the valve seat body 5 determines the metering of the fuel to be sprayed off.
  • the height of the annular gap 37 defined by the valve needle 3 is to be selected so that at least when the fuel injection valve 1 is open, the swirl channels 36 are connected to the annular gap 37. If the valve needle 3 together with the valve closing body 4 is in its open end position when the magnet coil 10 is excited, the cross-sectional area of the annular gap 37 represents the smallest cross section of the fuel stream to be flowed through on the way to the spray opening 7.
  • FIG. 3 shows an excerpted sectional illustration of the exemplary embodiment of a shown in FIG Fuel injection valve 1 according to the invention.
  • the swirl channels 36 open tangentially into the annular gap 37 which is formed between the valve closing body 4 and the guide recess 38 of the valve seat body 5.
  • the sum of the cross-sectional areas of the opening of the swirl channels 36 is larger than the cross-sectional area of the annular gap 37 formed between the guide recess 38 of the valve seat body 5 and the valve closing body 5 ,

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)

Abstract

L'invention concerne une soupape d'injection de carburant (1) destinée à un système d'injection de carburant pour moteurs à combustion interne. Cette soupape (1) comprend un pointeau de soupape (3) et un obturateur (4) qui est en liaison active avec ce pointeau de soupape et coopère avec une surface de siège de soupape (6) disposée dans un corps de soupape (5) pour créer une zone étanche, ainsi qu'au moins un élément générateur d'une turbulence, qui est disposé en amont de la zone étanche, dans le corps de siège de soupape (5). Cet élément générateur de turbulence est constitué d'au moins un canal à turbulence (36) qui est ouvert en direction du côté amont (33) du corps de siège de soupape (5) et placé dans le côté amont (33) dudit corps de siège de soupape (5).
EP01986748A 2000-10-13 2001-10-15 Soupape d'injection de carburant Withdrawn EP1328722A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10050751 2000-10-13
DE10050751A DE10050751B4 (de) 2000-10-13 2000-10-13 Brennstoffeinspritzventil
PCT/DE2001/003889 WO2002031353A1 (fr) 2000-10-13 2001-10-15 Soupape d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1328722A1 true EP1328722A1 (fr) 2003-07-23

Family

ID=7659649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01986748A Withdrawn EP1328722A1 (fr) 2000-10-13 2001-10-15 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US6824085B2 (fr)
EP (1) EP1328722A1 (fr)
JP (1) JP2004511703A (fr)
DE (1) DE10050751B4 (fr)
WO (1) WO2002031353A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004033280A1 (de) * 2004-07-09 2006-02-02 Robert Bosch Gmbh Einspritzventil zur Kraftstoffeinspritzung
US7735756B2 (en) * 2006-04-12 2010-06-15 Combustion Components Associates, Inc. Advanced mechanical atomization for oil burners
US8225602B2 (en) * 2009-06-11 2012-07-24 Stanadyne Corporation Integrated pump and injector for exhaust after treatment
US20100314470A1 (en) * 2009-06-11 2010-12-16 Stanadyne Corporation Injector having swirl structure downstream of valve seat
DE102011107609A1 (de) * 2011-06-30 2013-01-03 Albonair Gmbh Reduktionsmitteleinspritzdüse und Verfahren zur Herstellung einer Reduktionsmitteleinspritzdüse
EP2700808A1 (fr) * 2012-08-23 2014-02-26 Continental Automotive GmbH Plaque de siège et ensemble de soupape pour soupape d'injection
US12037967B2 (en) * 2020-08-19 2024-07-16 Cummins Inc. Fuel injector having nozzle spray holes with grooves
US11428411B1 (en) 2021-05-18 2022-08-30 General Electric Company Swirler with rifled venturi for dynamics mitigation

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Publication number Priority date Publication date Assignee Title
DE3234829A1 (de) * 1982-09-21 1984-03-22 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Einspritzvorrichtung fuer einen dieselmotor
US4715541A (en) * 1985-02-26 1987-12-29 Steyr-Daimler-Puch Ag Fuel injection nozzle for combustion engines
DE3808396C2 (de) * 1988-03-12 1995-05-04 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE3939093A1 (de) 1989-11-25 1991-05-29 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE3940585A1 (de) * 1989-12-08 1991-06-13 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
JPH0417769A (ja) * 1990-05-09 1992-01-22 Hino Motors Ltd 燃料噴射ノズル
DE4131499C1 (en) * 1991-09-21 1993-04-08 Robert Bosch Gmbh, 7000 Stuttgart, De IC engine fuel injection valve - has ring gap between downstream continuation of sealing and seating surfaces of nozzle
DE4231448C1 (de) * 1992-09-19 1993-10-21 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
US5860600A (en) * 1996-10-01 1999-01-19 Todd Combustion Atomizer (low opacity)
US5826798A (en) * 1996-10-01 1998-10-27 Todd Combustion Atomizer with array of discharge holes to provide improved combustion efficiency and process
US5713327A (en) * 1997-01-03 1998-02-03 Tilton; Charles L. Liquid fuel injection device with pressure-swirl atomizers
JP3933739B2 (ja) * 1997-01-30 2007-06-20 三菱電機株式会社 燃料噴射弁
DE19726991A1 (de) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Ventil und Verfahren zur Herstellung eines Ventilsitzes für ein Ventil
DE19804463B4 (de) * 1998-02-05 2006-06-14 Daimlerchrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
US6065692A (en) * 1999-06-09 2000-05-23 Siemens Automotive Corporation Valve seat subassembly for fuel injector
US6105884A (en) 1999-09-15 2000-08-22 Delphi Technologies, Inc. Fuel injector with molded plastic valve guides
US6257496B1 (en) * 1999-12-23 2001-07-10 Siemens Automotive Corporation Fuel injector having an integrated seat and swirl generator

Non-Patent Citations (1)

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Title
See references of WO0231353A1 *

Also Published As

Publication number Publication date
DE10050751B4 (de) 2005-08-11
WO2002031353A8 (fr) 2004-02-05
US6824085B2 (en) 2004-11-30
DE10050751A1 (de) 2002-04-25
US20030116659A1 (en) 2003-06-26
JP2004511703A (ja) 2004-04-15
WO2002031353A1 (fr) 2002-04-18

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 20030513

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20050606

17Q First examination report despatched

Effective date: 20050606

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 20070216