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EP1599669A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1599669A1
EP1599669A1 EP03767438A EP03767438A EP1599669A1 EP 1599669 A1 EP1599669 A1 EP 1599669A1 EP 03767438 A EP03767438 A EP 03767438A EP 03767438 A EP03767438 A EP 03767438A EP 1599669 A1 EP1599669 A1 EP 1599669A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve according
fuel
spray openings
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
EP03767438A
Other languages
German (de)
English (en)
Other versions
EP1599669B1 (fr
Inventor
Martin Maier
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 EP1599669A1 publication Critical patent/EP1599669A1/fr
Application granted granted Critical
Publication of EP1599669B1 publication Critical patent/EP1599669B1/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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1846—Dimensional characteristics of discharge 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
    • 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
    • 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
    • F02M51/0675—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 the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
    • 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.
  • a fuel injection valve for the direct injection of fuel into a mixture-compressing, spark-ignition internal combustion engine which provides a flow path for the fuel from a fuel inlet to a spray opening, in which a plurality of fuel channels are arranged in front of the spray opening, whose cross-section determines the amount of fuel injected per unit of time at a given fuel pressure.
  • a fuel injection valve for the direct injection of fuel into a mixture-compressing, spark-ignition internal combustion engine which provides a flow path for the fuel from a fuel inlet to a spray opening, in which a plurality of fuel channels are arranged in front of the spray opening, whose cross-section determines the amount of fuel injected per unit of time at a given fuel pressure.
  • a disadvantage of the fuel injector known from the above-mentioned document is, in particular, the limited possibilities of intervention in the formation of the Mixture cloud.
  • the possibilities for reducing fuel consumption or exhaust gas emissions are low.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a mixture cloud with high atomization quality for a jet-guided Brennver can be generated by a high fuel pressure in the fuel distribution line without the disadvantages that occur in fuel injectors with swirl insert such as high fuel consumption, coking Valve tip or increased exhaust emissions.
  • the spray openings open into extensions, which advantageously ensure effective coking protection in the mouth area of the spray openings.
  • Valve seat body are attached, for. B. on concentric or eccentric bolt circles or ellipses or on straight or curved rows.
  • the center points of the spray openings can be equidistant or at different distances from one another, just as the orientation of the axes of the spray openings can be arbitrary.
  • none of the spray openings are directed towards the spark plug, so that coking of the spark gap and a shortened service life can be avoided.
  • FIG. 1 shows a schematic section through an exemplary embodiment of a fuel injector designed according to the invention in an overall view
  • FIG. 2 shows a detail from the exemplary embodiment of a fuel injector according to the invention shown in FIG. 1 in area II in FIG. 1, and
  • FIG. 3 shows an enlarged detail from FIG. 2 in area III.
  • Fig. 1 shows a sectional view of an embodiment of an inventive
  • Fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.
  • the fuel injector 1 is suitable for direct Injecting fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injector 1 consists of 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 valve closing body is almost spherical and thereby contributes to an offset-free guidance in the valve seat body 5.
  • fuel injector 1 is an inward opening fuel injector 1 which has two spray orifices 7.
  • the spray openings 7 open out according to the invention in extensions 38 in the valve seat body 5, which serve as coking protection. A detailed representation of the spray openings 7 can be found in FIG. 2 and the following description.
  • the nozzle body 2 is sealed by a seal 8 against an outer pole 9 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 the 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 coating 18, which can be molded onto the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disk 15 is used for stroke adjustment.
  • An armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected via a first flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22 connected is.
  • a restoring spring 23 is supported on the first flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
  • a second flange 34 is arranged on the downstream side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld 35. Between the armature 20 and the second flange 34 there is an elastic intermediate ring 33 for damping armature bumpers when the fuel injector closes
  • Fuel channels 30 and 31 run in the valve needle guide 14 and in the armature 20.
  • bevels 32 are formed which guide the fuel to the sealing seat.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
  • Another seal 36 seals against the cylinder head of the internal combustion engine, also not shown.
  • the valve closing body 4 acted against its stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing contact.
  • the armature 20 rests on the intermediate ring 33, which is supported on the second flange 34.
  • the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 in the stroke direction against the spring force of the return spring 23.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction.
  • the valve closing body 4, which is operatively connected to the valve needle 3, lifts off the valve seat surface 6, as a result of which the fuel led to the spray opening 7 is sprayed off.
  • the armature 20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23 on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction.
  • the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • the armature 20 rests on the armature stop formed by the second flange 34.
  • stepped spray openings 7 are provided in the valve seat body 5.
  • the spray openings 7 expand in an injection direction of the fuel into an extension 38. This measure serves to protect against coking in the area of the mouths of the spray openings 7.
  • a precipitation of fuel in the area of the spray openings otherwise causes an accumulation of combustion residues, which have the diameter of Reduce spray openings 7 and thus the amount of fuel sprayed to an increasing extent.
  • the function of fuel injector 1 is restricted and it no longer provides enough fuel for combustion in the combustion chamber of the internal combustion engine. The result is increased fuel consumption and a deterioration in emissions.
  • a total length 1 of the spray openings 7 may be used
  • a reduced length 1 'of the spray openings 7 on the inflow side of the enlargement 38 must not exceed a certain value for optimal jet preparation.
  • the dimensions are shown in Fig. 3.
  • the ratio of length 1 'to diameter d is therefore 1 ' ⁇ 3 • d.
  • the diameter d of the spray openings 7 is preferably
  • n denotes the number of spray openings 7 and is at least 2
  • p is that in the
  • Fuel distribution line applied fuel pressure in Mpa.
  • the spray openings 7 can be provided at any points on the valve seat body 5.
  • the configuration of the spray openings 7 can consist of one or more round or elliptical, concentric or eccentric to one another or to a center of the valve seat body 5 arranged circles of holes or one or more parallel, obliquely, staggered or not staggered straight or curved rows of holes.
  • a distance between the center points of the spray openings 7 can be equidistant or different, but should be at least 180% of the diameter d of the spray openings 7 for manufacturing reasons.
  • the spatial orientation of a longitudinal axis of the spray openings 7 can be for each spray opening 7 to be different. However, none of the longitudinal axes is directed to a spark plug, also not shown, which is also arranged in the combustion chamber of the internal combustion engine. A shortened spark plug service life can be avoided in this way.
  • the entirety of all spray openings 7 injects a mixture cloud into the combustion chamber, the axis of gravity of which can be inclined in any spatial direction with respect to a longitudinal axis 37 of fuel injector 1 between 0 ° and 70 ° and whose conical expansion is between 30 ° and 100 °.
  • the wall thickness t of the valve seat body 5 is calculated as follows:
  • valve seat body 5 can be machined in the corresponding areas in a simple manner.
  • the invention is not limited to the illustrated embodiment and z. B. for arbitrarily arranged spray openings 7 and for any construction of inwardly opening multi-hole fuel injection valves 1 applicable.

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

Soupape d'injection (1) de carburant pour l'injection directe de carburant dans la chambre de combustion (39) d'un moteur à combustion interne, qui comporte un actionneur excitable (10), une aiguille (3) de soupape se trouvant en coopération avec l'actionneur (10) et soumise, dans un sens de fermeture, à l'action d'un ressort de rappel (23), ladite aiguille étant destinée à actionner un obturateur (4) de soupape constituant un siège étanche avec une surface (6) de siège formée sur un corps (5) de siège de soupape, et au moins deux ouvertures d'injection (7). La pression du carburant s'écoulant par la soupape d'injection (1) de carburant est supérieure à 10 bars.
EP03767438A 2003-02-25 2003-11-19 Soupape d'injection de carburant Expired - Lifetime EP1599669B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10307931 2003-02-25
DE10307931A DE10307931A1 (de) 2003-02-25 2003-02-25 Brennstoffeinspritzventil
PCT/DE2003/003841 WO2004076851A1 (fr) 2003-02-25 2003-11-19 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1599669A1 true EP1599669A1 (fr) 2005-11-30
EP1599669B1 EP1599669B1 (fr) 2009-10-14

Family

ID=32920611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03767438A Expired - Lifetime EP1599669B1 (fr) 2003-02-25 2003-11-19 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US7677478B2 (fr)
EP (1) EP1599669B1 (fr)
JP (1) JP4200137B2 (fr)
DE (2) DE10307931A1 (fr)
WO (1) WO2004076851A1 (fr)

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DE10319694A1 (de) * 2003-05-02 2004-12-02 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10354467A1 (de) * 2003-11-21 2005-06-09 Robert Bosch Gmbh Brennstoffeinspritzventil
FR2878583A1 (fr) * 2004-11-29 2006-06-02 Renault Sas Buse d'injection de carburant
JP2007177766A (ja) * 2005-12-28 2007-07-12 Toyota Motor Corp 燃料噴射装置
JP4610631B2 (ja) * 2008-05-01 2011-01-12 三菱電機株式会社 燃料噴射弁
JP4988791B2 (ja) * 2009-06-18 2012-08-01 日立オートモティブシステムズ株式会社 燃料噴射弁
US20110030635A1 (en) * 2009-08-04 2011-02-10 International Engine Intellectual Property Company, Llc Fuel injector nozzle for reduced coking
JP5395007B2 (ja) * 2010-07-22 2014-01-22 日立オートモティブシステムズ株式会社 燃料噴射弁およびそれを搭載した車両用内燃機関
KR101198805B1 (ko) * 2010-12-02 2012-11-07 현대자동차주식회사 차량용 인젝터
FR2968720B1 (fr) * 2010-12-09 2015-08-07 Continental Automotive France Injecteur, notamment pour l'injection multipoints de carburant dans un moteur a combustion interne
DE102011089240A1 (de) * 2011-12-20 2013-06-20 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zur Ausformung von Abspritzöffnungen
JP5959892B2 (ja) * 2012-03-26 2016-08-02 日立オートモティブシステムズ株式会社 火花点火式燃料噴射弁
DE102012209326A1 (de) * 2012-06-01 2013-12-05 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102012221713A1 (de) * 2012-11-28 2014-05-28 Robert Bosch Gmbh Einspritzventil
KR101337713B1 (ko) * 2012-12-20 2013-12-06 주식회사 현대케피코 연료 미립화 밸브 시트 바디를 구비한 차량용 고압 직분식 인젝터
DE102013101554A1 (de) 2013-02-15 2014-08-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Otto-Brennkraftmaschine
US9850869B2 (en) * 2013-07-22 2017-12-26 Delphi Technologies, Inc. Fuel injector
JP6364962B2 (ja) * 2014-05-28 2018-08-01 株式会社デンソー 燃料噴射弁
JP6311472B2 (ja) * 2014-06-16 2018-04-18 株式会社デンソー 燃料噴射弁
JP5969564B2 (ja) * 2014-10-01 2016-08-17 トヨタ自動車株式会社 燃料噴射弁
JP6292188B2 (ja) * 2015-04-09 2018-03-14 株式会社デンソー 燃料噴射装置
WO2018101118A1 (fr) * 2016-11-30 2018-06-07 日立オートモティブシステムズ株式会社 Dispositif d'injection de combustible
US10865754B2 (en) * 2017-04-05 2020-12-15 Progress Rail Services Corporation Fuel injector having needle tip and nozzle body surfaces structured for reduced sac volume and fracture resistance
US10612508B2 (en) * 2017-06-28 2020-04-07 Caterpillar Inc. Fuel injector for internal combustion engines
NO20171100A1 (en) 2017-07-04 2019-01-07 Rsm Imagineering As A dual-acting pressure boosting liquid partition device, system, fleet and use
CN111379651A (zh) * 2020-04-15 2020-07-07 德尔福柴油系统（烟台）有限公司 一种汽油阀座喷嘴及其加工方法
GB2631760A (en) * 2023-07-13 2025-01-15 Phinia Delphi Luxembourg Sarl Fuel injector

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Also Published As

Publication number Publication date
DE50312036D1 (de) 2009-11-26
JP4200137B2 (ja) 2008-12-24
WO2004076851A1 (fr) 2004-09-10
US20070012805A1 (en) 2007-01-18
US7677478B2 (en) 2010-03-16
JP2006509157A (ja) 2006-03-16
EP1599669B1 (fr) 2009-10-14
DE10307931A1 (de) 2004-10-28

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