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EP1312796B1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1312796B1
EP1312796B1 EP20020024775 EP02024775A EP1312796B1 EP 1312796 B1 EP1312796 B1 EP 1312796B1 EP 20020024775 EP20020024775 EP 20020024775 EP 02024775 A EP02024775 A EP 02024775A EP 1312796 B1 EP1312796 B1 EP 1312796B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
valve
injection valve
fuel
flow
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
EP20020024775
Other languages
German (de)
English (en)
Other versions
EP1312796A3 (fr
EP1312796A2 (fr
Inventor
Gerhard Suchomel
Josef Pickel
Fridolin Zeck
Juergen Schubert
Friedrich Weis
Mattias Klinger
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7705780&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1312796(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1312796A2 publication Critical patent/EP1312796A2/fr
Publication of EP1312796A3 publication Critical patent/EP1312796A3/fr
Application granted granted Critical
Publication of EP1312796B1 publication Critical patent/EP1312796B1/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
    • 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
    • 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
    • F02M61/16—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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • a fuel injection system for a mixture-compression spark-ignition internal combustion engine which comprises a fuel injection valve which injects fuel into a combustion chamber formed by a piston / cylinder construction and is provided with a spark plug protruding into the combustion chamber.
  • the fuel injection valve is provided with at least one row of injection holes distributed over the circumference of the fuel injection valve. Through a targeted injection of fuel via the injection holes, a spray-guided combustion process is achieved by forming a mixture cloud with at least one jet.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that the course de cross-sectional contour line of the wall of the injection orifice between the inlet region and the Asuslauf Schl is parabolic, creating a streamlined continuous course between the inlet region and the injection orifice is achieved.
  • the coking tendency and the flow behavior are also advantageously influenced by an extended catchment radius, which is provided in the inlet region of the spray-discharge openings.
  • the ejection openings are advantageously produced by erosion or another suitable manufacturing method such as laser drilling and subsequently by means of hydroerosion or another post-processable fluid-flow machining process, whereby the wall of the injection orifices smoothed and the Kavitationsne Trent is reduced.
  • Fig. 1 shows in an excerpt sectional view of an embodiment of a fuel injection valve according to the invention 1.
  • the fuel injection valve 1 is designed 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 for direct injection of fuel into a combustion chamber (not shown) of an internal combustion engine and for non-spark-ignited, spray-guided combustion processes (eg a diesel 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 operatively connected to a valve closing body 4 which cooperates with a valve seat body 6 arranged on a valve seat body 5 to form 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 valve closing body 4 of the inventively designed fuel injection valve 1 has a nearly spherical shape. As a result, an offset-free, gimbal valve needle guide is achieved, which ensures an exact functioning of the fuel injection valve 1.
  • the valve seat body 5 of the fuel injection valve 1 is formed almost pot-shaped and contributes by its shape to the valve needle guide.
  • the valve seat body 5 is inserted into a spray-side recess 34 of the nozzle body 2 and connected by a weld 35 to the nozzle body 2.
  • the valve closing body 4 and the valve seat body 5 have a sealing function for the inflowing fuel with respect to the downstream 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 by a gap 26 and are based on a connecting member 29 from.
  • 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.
  • a valve needle guide 14 For stroke adjustment is a paired shim 15.
  • An the other side of the shim 15 is an anchor 20.
  • This is a non-positively connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21.
  • a return spring 23 On the first 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.
  • a second flange 31 is arranged, which serves as a lower anchor stop. He is connected via a weld 33 non-positively with the valve needle 3. Between the armature 20 and the second flange 31, an elastic intermediate ring 32 for damping armature bouncers when closing the fuel injection valve 1 is arranged.
  • valve needle guide 14 and the armature 20 run fuel channels 30a and 30b.
  • valve closing body 4 On the valve closing body 4 are polished 36, through which the fuel is passed to the sealing seat.
  • 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 distribution line, not shown.
  • the fuel injection valve 1 has on the valve seat body 5, which is arranged in a recess 34 of the nozzle body 2 and, for example, by means of a weld 35 connected thereto, in the flow direction tapered ejection openings 7, which are rounded in an inlet region 39.
  • the special shape of the ejection openings 7 reduces the coking tendency and thus prevents malfunctions of the fuel injection valve 1 due to clogging of the ejection openings 7 and an impermissible reduction in the fuel flow.
  • the positive influencing of the flow behavior results in a more effective mixture formation and subsequently lower emission values promoted.
  • An exemplary spray opening 7 of the fuel injection valve 1 with the inventive measures is in the Figs. 2, 3A and 3B shown in more detail and explained in the following description.
  • the first flange 21 is acted on the valve needle 3 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.
  • the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
  • this builds up a magnetic field, which moves the armature 20 against the spring force of the return spring 23 in the stroke direction.
  • the armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus the valve needle 3 also in the stroke direction with.
  • the valve-closing body 4, which is in operative connection with the valve needle 3, lifts off from the valve seat surface 6, as a result of which the fuel is sprayed off at the spray-discharge openings 7.
  • the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 on the first flange 21 from the inner pole 13, whereby the valve needle 3 moves against the stroke direction.
  • the valve closing body 4 is seated on the valve seat surface 6, and the fuel injection valve 1 is closed.
  • the armature 20 is seated on the anchor stop formed by the second flange 31.
  • Fig. 2 shows in a partial sectional view of the downstream part of the in Fig. 1 represented inventively designed fuel injector 1 in the area II in Fig. 1 , For clarity of presentation of the inventive measures another type of fuel injection valve 1 was selected. Matching components are provided in all figures with corresponding reference numerals.
  • the injection openings 7 formed in the valve seat body 5 are tapered in the flow direction of the fuel and rounded in an inlet region 39.
  • the inlet region 39 therefore has a larger diameter than a discharge region 42 formed downstream of the inlet region 39.
  • the cross-sectional contour line 43 of the wall between the inlet region 39 and the outlet region 42 extends parabolically, so that there are no edges in a wall 41 of the spray-discharge opening 7 or other deviations from a fluidically favorable, smooth shape.
  • they are arranged on a plurality of round or elliptical hole circles, which may be concentric or eccentric to each other, or on a plurality of parallel, obliquely or staggered straight or curved rows of holes.
  • the distance between the hole centers may be equidistant or different, but should be at least one hole diameter for manufacturing reasons.
  • the spatial orientation may be different for each hole axis, as in FIG Fig. 2 for two ejection openings 7 indicated. The preparation of the ejection openings 7 will be described below with reference to the FIGS. 3A and 3B explained.
  • FIGS. 3A and 3B show in a partial sectional view of an inventively designed fuel injection valve 1 in the region of an exemplary spray opening 7 in two consecutive processing steps.
  • Fig. 3A shows an exemplary injection opening 7 of a inventively designed fuel injector 1 after a first processing step.
  • the injection opening 7 is produced, for example, by means of erosion or another suitable manufacturing process in a basic form.
  • the inlet region 39 of the ejection opening 7 is designed to be less favorable in terms of flow, which increases the tendency to cavitation and adversely affects the flow behavior. This requires post-processing.
  • Fig. 3B shows in the same representation as Fig. 3A the exemplary spray opening 7 after the second processing step.
  • Compared to the original shape of the inlet region 39 is reworked, so that the diameter of the injection opening 7 in the inlet region 39 is greater than in the outlet region 42. This results in a flow-shaped injection molding 7.
  • the cross-sectional contour line of the injection opening 7 between the inlet region 39 and the outlet region 42 extends parabolic.
  • the post-processing of the preformed ejection opening 7 is preferably carried out by means of hydroerosion or another flow-guided process, whereby the wall 41 of the ejection opening 7 is smoothed and thereby the Kavitationsne Trent is reduced.
  • the hydroerosion takes place by means of a viscous abrasive, which can be chosen so that the roughening of the wall 41 can be polished.
  • a catchment radius 40 is provided as a further flow-promoting measure, which is advantageous for avoiding flow separation in the injection opening 7.
  • the flow behavior and the mixture formation can be improved, whereby the emission values decrease. Since the diameter of the ejection openings 7 typically less than 200 microns is, the risk that the ejection openings 7 clogged by coking with time and thus the flow rate is unduly restricted, relatively large. Due to the tapering shape of the ejection openings 7, the flow rate of the fuel increases in the flow direction, whereby a separation of the flow in the ejection opening 7 is prevented. Due to the applied flow, the ejection openings 7 are protected from coking, so that they can not grow over by coking residues.
  • 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 injectors 1 applicable. Likewise, the invention is applicable to auto-ignition internal combustion engines (eg diesel engines).
  • auto-ignition internal combustion engines eg diesel engines.

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

Claims (4)

  1. Injecteur de carburant (1) pour des installations d'injection de carburant dans des moteurs à combustion interne, comprenant un organe d'obturation de soupape (4) formant un siège d'étanchéité avec une surface de siège de soupape (6) réalisée sur le corps de siège de soupape (5) et au moins un orifice d'éjection (7) dans la direction de passage en aval du siège d'étanchéité,
    l'orifice d'éjection (7) ayant une forme allant en rétrécissant dans la direction d'écoulement, la zone d'entrée (39) de l'orifice d'éjection (7) étant arrondie et présentant un angle d'ouverture plus grand que la zone de sortie (42),
    caractérisé par
    une ligne de contour de section (43) de l'orifice d'éjection (7) de forme parabolique entre la zone d'entrée (39) et la zone de sortie (42).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    les orifices d'éjection (7) sont usinés par érosion.
  3. Injecteur de carburant selon l'une des revendications 1 ou 2,
    caractérisé par
    un rayon rentrant (40) dans la zone d'entrée (39) des orifices d'éjection (7).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    les orifices d'éjection (7) sont usinés en finition par un procédé par passage de fluide.
EP20020024775 2001-11-15 2002-11-07 Soupape d'injection de combustible Expired - Lifetime EP1312796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001156020 DE10156020A1 (de) 2001-11-15 2001-11-15 Brennstoffeinspritzventil
DE10156020 2001-11-15

Publications (3)

Publication Number Publication Date
EP1312796A2 EP1312796A2 (fr) 2003-05-21
EP1312796A3 EP1312796A3 (fr) 2006-02-01
EP1312796B1 true EP1312796B1 (fr) 2008-02-13

Family

ID=7705780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020024775 Expired - Lifetime EP1312796B1 (fr) 2001-11-15 2002-11-07 Soupape d'injection de combustible

Country Status (3)

Country Link
EP (1) EP1312796B1 (fr)
JP (1) JP2003184706A (fr)
DE (2) DE10156020A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3803098B1 (fr) * 2018-06-08 2024-07-31 Liebherr-Components Deggendorf GmbH Procédé de fabrication d'une buse d'injection de carburant

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2876750B1 (fr) * 2004-10-19 2010-09-17 Renault Sas Buse d'injection possedant des trous de conicites differentes et moteur comportant une telle buse
JP4079144B2 (ja) 2004-12-20 2008-04-23 株式会社豊田中央研究所 燃料噴射弁
EP2088185B1 (fr) * 2006-08-04 2011-11-02 Infineum International Limited Composition de carburant diesel
US20080060608A1 (en) * 2006-09-07 2008-03-13 Angela Priscilla Breakspear Method and use for the prevention of fuel injector deposits
EP1900795A1 (fr) * 2006-09-07 2008-03-19 Infineum International Limited Procédé et utilisation pour la prévention de dépôts d'injecteur de carburant.
AT512423A1 (de) * 2012-02-07 2013-08-15 Bosch Gmbh Robert Einspritzdüse zum einspritzen von medien in den brennraum einer brennkraftmaschine
JP6036354B2 (ja) * 2013-02-04 2016-11-30 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102016208080A1 (de) * 2016-05-11 2017-11-16 Volkswagen Ag Kraftstoffeinspritzventil sowie Verfahren zur Herstellung eines Kraftstoffeinspritzventils

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8817774D0 (en) * 1988-07-26 1988-09-01 Lucas Ind Plc Fuel injectors for i c engines
GB8827107D0 (en) * 1988-11-19 1988-12-21 Lucas Ind Plc Fuel injection nozzle
US5026462A (en) * 1990-03-06 1991-06-25 Ail Corporation Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles
DE69627507T2 (de) * 1995-08-04 2003-11-06 Dynetics Llc, Woburn Verfahren und vorrichtung zum bearbeiten einer öffnung mittels einer abrasiven flüssigkeit
DE19729827A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE19804463B4 (de) 1998-02-05 2006-06-14 Daimlerchrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
DE19914719C2 (de) * 1999-03-31 2001-05-03 Siemens Ag Vorrichtung zum hydroerosiven Runden von Einlaufkanten der Spritzlochkanäle in einem Düsenkörper
JP3879909B2 (ja) * 2001-03-29 2007-02-14 株式会社デンソー 燃料噴射装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3803098B1 (fr) * 2018-06-08 2024-07-31 Liebherr-Components Deggendorf GmbH Procédé de fabrication d'une buse d'injection de carburant

Also Published As

Publication number Publication date
DE50211662D1 (de) 2008-03-27
JP2003184706A (ja) 2003-07-03
DE10156020A1 (de) 2003-07-17
EP1312796A3 (fr) 2006-02-01
EP1312796A2 (fr) 2003-05-21

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