EP1328720A2 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1328720A2
EP1328720A2 EP01986747A EP01986747A EP1328720A2 EP 1328720 A2 EP1328720 A2 EP 1328720A2 EP 01986747 A EP01986747 A EP 01986747A EP 01986747 A EP01986747 A EP 01986747A EP 1328720 A2 EP1328720 A2 EP 1328720A2
Authority
EP
European Patent Office
Prior art keywords
valve
fuel injection
swirl
fuel
valve seat
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Withdrawn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
EP01986747A
Other languages
German (de)
English (en)
Inventor
Guenter Dantes
Detlef Kowak
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 EP1328720A2 publication Critical patent/EP1328720A2/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Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the invention relates to a fuel injection valve 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.
  • FIG. 1 Another fuel injection valve, in which the swirl is generated by grooves, is known from DE 42 31 448 Cl.
  • 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 amount of fuel and the spray pattern are easily possible. It is done by changing only one component with the The swirl generation can be varied in the axial proportion of the fuel flow. This leads to a change in the cone shell on which the fuel is sprayed off.
  • 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.
  • An arrangement of the swirl channels on a conical jacket, the angle of which is identical to the angle of the valve seat surface, is also advantageous. As a result of the elimination of strong flow deflection downstream of the swirl generation, there is no loss in the peripheral speed of the fuel on the way to the spray opening.
  • 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 shows a schematic partial section through.
  • 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 injection valve 1 is in the form of a fuel injector 10 '1 is - mixture-fuel injection systems of spark ignition
  • 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 stands with a valve closing body 4 in
  • the fuel injection valve 1 is an electromagnetically actuated fuel injection valve 1, which has a 5 spray opening 7.
  • the nozzle body 2 is sealed by a seal 8 against the outer pole of a solenoid 10).
  • 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 may 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 magnetic coil 10 When the magnetic 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 valve closing body 4, which is in operative connection with the valve needle 3, lifts off the valve seat surface 6, and the fuel reaching the spray opening 7 i via swirl channels 36 and a subsequent annular gap 37 is sprayed off.
  • FIG. 2 shows an excerpted sectional view of the swirl-generating assembly of a fuel injector 1 according to the invention.
  • the swirl-generating assembly consists of the valve seat body 5, the valve needle 3 and the one that 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.
  • valve seat body 5 introduced. They are open to the upstream surface 33 of the valve seat body 5 and preferably open tangentially into the guide hole 38.
  • the swirl channels are designed as grooves in the valve seat body 5.
  • the bottom 39 of the grooves forms the 5 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 ⁇
  • the valve needle 3 has a radial enlargement 31 upstream of the upstream surface 33 of the valve seat body 5, 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.
  • annular gap 37 determines the metering of the fuel to be sprayed.
  • the height of the annular gap 37 defined by the valve needle 3 is to be selected such that the 0 swirl channels 36 are connected to the annular gap 37 at least when the fuel injector 1 is open. If the valve needle 3 together with the valve closing body 4 is in its open end position when the magnet coil 10 is energized, the cross-sectional area of the annular gap 37 represents the smallest cross section 5 of the fuel flow to be flowed through on the way to the spray opening 7
  • 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.
  • the cross-sectional areas of the openings can be adjusted by increasing the axial extent of the valve closing body 4 in the area of the annular gap 37.

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 (1) pour des installations d'injection de carburant sur des moteurs à combustion interne. Cette soupape comprend un pointeau (3) et un corps de fermeture (4) de soupape en liaison active avec ledit pointeau, ledit corps de fermeture coopérant avec une surface de siège (6) de soupape agencée dans un corps de siège (5) de soupape pour former un siège étanche, et au moins un élément générateur de turbulence, agencé dans le corps de siège (5) de soupape en amont du siège étanche. Un ou plusieurs canaux de turbulence (36), ouverts en direction du côté amont (33) du corps de siège (5) de soupape, sont introduits côté amont (33) du corps de siège (5) de soupape pour former ledit élément générateur de turbulence.
EP01986747A 2000-10-13 2001-10-15 Soupape d'injection de carburant Withdrawn EP1328720A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10050752 2000-10-13
DE10050752A DE10050752B4 (de) 2000-10-13 2000-10-13 Brennstoffeinspritzventil mit einem drallerzeugenden Element
PCT/DE2001/003913 WO2002031352A2 (fr) 2000-10-13 2001-10-15 Soupape d'injection de carburant

Publications (1)

Publication Number Publication Date
EP1328720A2 true EP1328720A2 (fr) 2003-07-23

Family

ID=7659650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01986747A Withdrawn EP1328720A2 (fr) 2000-10-13 2001-10-15 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6764027B2 (fr)
EP (1) EP1328720A2 (fr)
JP (1) JP2004511702A (fr)
CZ (1) CZ20022032A3 (fr)
DE (1) DE10050752B4 (fr)
WO (1) WO2002031352A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10247958A1 (de) * 2002-10-15 2004-04-29 Robert Bosch Gmbh Kraftstoff-Einspritzvorrichtung für eine Brennkraftmaschine
EP1811166B1 (fr) * 2006-01-24 2008-11-05 Continental Automotive GmbH Ensemble à vanne pour une soupape d'injection et soupape d'injection
EP2108811B1 (fr) * 2007-01-29 2014-07-09 Mitsubishi Electric Corporation Injecteur de carburant
US10006427B2 (en) * 2013-08-19 2018-06-26 Kangmei Wang Centrifugal conical-spray nozzle
CN110000016A (zh) * 2019-04-26 2019-07-12 江苏巴腾科技有限公司 一种阀座及高压斜入式喷嘴
CN116557558B (zh) * 2023-05-16 2023-09-29 建湖县鸿达阀门管件有限公司 一种175MPa防砂型平板阀

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002025101A1 (fr) * 2000-09-19 2002-03-28 Robert Bosch Gmbh Procede de production d'un corps de siege de soupape a injection de carburant
WO2002025102A1 (fr) * 2000-09-19 2002-03-28 Robert Bosch Gmbh Soupape d'injection de carburant

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
JPS61118556A (ja) * 1984-11-14 1986-06-05 Toyota Central Res & Dev Lab Inc 間欠式渦巻噴射弁
DE3502642A1 (de) 1985-01-26 1986-07-31 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzventil fuer eine luftverdichtende einspritzbrennkraftmaschine
DE3521040A1 (de) * 1985-06-12 1986-12-18 Vdo Adolf Schindling Ag, 6000 Frankfurt Einspritzventil
JP2628742B2 (ja) * 1989-03-10 1997-07-09 株式会社日立製作所 電磁式燃料噴射弁
DE3939093A1 (de) * 1989-11-25 1991-05-29 Bosch Gmbh Robert Elektromagnetisch betaetigbares kraftstoffeinspritzventil
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
US5288025A (en) * 1992-12-18 1994-02-22 Chrysler Corporation Fuel injector with a hydraulically cushioned valve
JP3075201B2 (ja) * 1996-12-20 2000-08-14 株式会社デンソー 燃料噴射弁
JP3933739B2 (ja) * 1997-01-30 2007-06-20 三菱電機株式会社 燃料噴射弁
DE19907859A1 (de) * 1998-08-27 2000-03-02 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19904720C2 (de) 1999-02-05 2003-01-16 Siemens Ag Injektor für eine Einspritzanlage einer Brennkraftmaschine
US6042028A (en) * 1999-02-18 2000-03-28 General Motors Corporation Direct injection fuel injector spray nozzle and method
JP4055315B2 (ja) 1999-03-17 2008-03-05 株式会社日立製作所 燃料噴射弁およびこれを搭載した内燃機関
US6105884A (en) * 1999-09-15 2000-08-22 Delphi Technologies, Inc. Fuel injector with molded plastic valve guides

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002025101A1 (fr) * 2000-09-19 2002-03-28 Robert Bosch Gmbh Procede de production d'un corps de siege de soupape a injection de carburant
WO2002025102A1 (fr) * 2000-09-19 2002-03-28 Robert Bosch Gmbh Soupape d'injection de carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0231352A2 *

Also Published As

Publication number Publication date
DE10050752B4 (de) 2005-06-02
WO2002031352A2 (fr) 2002-04-18
CZ20022032A3 (cs) 2003-12-17
US20030047623A1 (en) 2003-03-13
JP2004511702A (ja) 2004-04-15
WO2002031352A3 (fr) 2002-08-08
US6764027B2 (en) 2004-07-20
DE10050752A1 (de) 2002-04-25

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