EP1395749B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1395749B1
EP1395749B1 EP02735065A EP02735065A EP1395749B1 EP 1395749 B1 EP1395749 B1 EP 1395749B1 EP 02735065 A EP02735065 A EP 02735065A EP 02735065 A EP02735065 A EP 02735065A EP 1395749 B1 EP1395749 B1 EP 1395749B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
flow ducts
fuel
elevations
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
EP02735065A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1395749A1 (de
Inventor
Jörg 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 EP1395749A1 publication Critical patent/EP1395749A1/de
Application granted granted Critical
Publication of EP1395749B1 publication Critical patent/EP1395749B1/de
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
    • 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
    • F02M61/18—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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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 is based on a fuel injection valve according to the preamble of the main claim, such as in US 5,752,316.
  • a Fuel injector includes the fuel in one combustion chamber formed by a piston / cylinder construction injected, and with a protruding into the combustion chamber Spark plug is provided.
  • the fuel injection valve is with at least one row over the circumference of the Fuel injector arranged distributed Provided injection holes. Through a targeted injection of fuel through the injection holes becomes one beam-guided combustion process by forming a Mixture cloud realized with at least one jet.
  • a disadvantage of the above-mentioned document known fuel injection valve is in particular the Coking of the ejection openings, which thereby clog and the flow through the fuel injector diminish impermissibly. This leads to malfunctions the internal combustion engine.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the spray openings so are designed that bead-shaped elevations over the raise the outer end face of the valve seat body, the Include flow channels in which the fuel to the Spray openings is passed.
  • the injection openings open into the combustion chamber of the internal combustion engine.
  • the diameter of the tapered Flow channels to the spray orifices so that the Flow in the flow channels does not break off.
  • a trumpet or cone-shaped rejuvenation also a barrel-like shape, which initially widened and then rejuvenated, by Advantage.
  • the preparation of the injection openings is by means of a Dorns, in the flow direction through the valve seat body is beaten, just possible.
  • the shape of the Flow channels is in a simple way by the shape of the Dorns modelable.
  • the shape of the edge can be be designed at the spray orifices, with particular a tapered edge because of the low Deposit area for coking is favorable.
  • the coking tendency is also enhanced by an Einzugsradius, in the production of the injection openings arises, favorably influenced.
  • Fig. 1 shows in an excerpted sectional view first embodiment of an inventive Fuel Injector 1.
  • the fuel injector 1 is in the form of a fuel injection valve 1 for Fuel injection systems of mixture compression, spark-ignited internal combustion engines running.
  • the Fuel injector 1 is suitable for direct Injecting fuel into a not shown Combustion chamber of an internal combustion 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 in operative connection with a Valve closing body 4, with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together.
  • the fuel injection valve 1 is it in the exemplary embodiment to an inward opening fuel injection valve 1, which over at least one injection opening 7 has.
  • the valve closing body 4 of the inventively designed Fuel injection valve 1 has a nearly spherical Shape up. As a result, an offset-free, gimbaled Valve needle guide achieved for a precise Operation of the fuel injection valve 1 provides.
  • the valve seat body 5 of the fuel injection valve 1 is almost pot-shaped and contributes by its shape Valve needle guide at.
  • the valve seat body 5 is in a spray-side recess 34 of the nozzle body second used and by means of a weld 35 with the Nozzle body 2 connected.
  • the nozzle body 2 is by a seal 8 against a Outer pole 9 of a magnetic coil 10 sealed.
  • the magnetic coil 10 is encapsulated in a coil housing 11 and on a Coil wound 12, which at an inner pole 13 of Magnetic coil 10 is applied.
  • the inner pole 13 and the outer pole 9 are separated and supported by a gap 26 on a connecting member 29 from.
  • the magnetic coil 10th is via a line 19 of a via an electrical Plug contact 17 energized electrical power.
  • Of the Plug contact 17 is of a plastic casing 18th surrounded, which can be molded on the inner pole 13.
  • the valve needle 3 is in a valve needle guide fourteenth guided, which is designed disk-shaped. to Stroke adjustment is a paired shim 15.
  • An the other side of the dial 15 is a Anchor 20. This is about a first flange 21st non-positively connected to the valve needle 3 in conjunction, which by a weld 22 with the first flange 21 connected is.
  • On the first flange 21 is supported Return spring 23 from which in the present design of Fuel injection valve 1 by a sleeve 24 Bias is brought.
  • a second flange 31st Downstream of the armature 20 is a second flange 31st arranged, which serves as a lower anchor stop. He is over a weld 33 frictionally with the valve needle. 3 connected. Between the armature 20 and the second flange 31 is an elastic intermediate ring 32 for damping Anchor bouncers when closing the fuel injector 1 arranged.
  • the armature 20 and the Valve seat body 5 extend fuel channels 30a to 30c.
  • the fuel is via a central fuel supply 16 supplied and filtered by a filter element 25.
  • the Fuel injection valve 1 is opposed by a seal 28 sealed a not.weiter shown distribution line.
  • the fuel injection valve 1 at the Valve seat body 5 which in a recess 34 of the Nozzle body 2 arranged and for example by means of a Weld 35 is connected to this, surveys 36, in which in the ejection openings 7 opening Flow channels 39 run.
  • the surveys 36 are included on an outer end face 38 of the valve seat body 5 educated. They degrade by their special shape and Arrangement the coking tendency of the injection openings 7 and thus prevent malfunction of the fuel injection valve 1 by clogging the spray openings 7 and a improper reduction of fuel flow.
  • the discharge-side part of the fuel injection valve 1 with the inventive measures is in the following Figures shown and explained in detail.
  • the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 on the first flange 21 from the inner pole thirteenth from, causing the valve needle 3 against the stroke direction emotional. As a result, the valve closing body 4 is placed on the Valve seat surface 6, and the fuel injection valve. 1 will be closed. The armature 20 sits on the through the second flange 31 formed anchor stop.
  • Fig. 2A shows in an excerpted sectional view of the in Fig. 1 denoted by IIA section of the in Fig. 1st illustrated first embodiment of a Inventively designed fuel injection valve. 1
  • valve seat body 5 in the first embodiment described at its the Combustion chamber facing outer end face 38 elevations 36 on, in which run flow channels, which in the Spray openings 7 open.
  • the spray openings 7 are in the present Embodiment in the outer end face 38 of Valve seat body 5 is formed.
  • the spray openings 7 can at any point of the valve seat body. 5 to be appropriate. Preferably, they are on several rounds or elliptical hole circles concentric with each other or eccentric, or on several parallel, obliquely or staggered straight or arranged curved rows of holes.
  • the distance between the Hole centers can be equidistant or be different, but should be off production reasons at least one Hole diameter.
  • the spatial orientation can be different for each hole axis, as in Fig. 2A for two ejection openings 7 indicated.
  • the elevations 36 are dome-shaped to tubular over the outer end face 38 of the valve seat body 5 raised.
  • the Production of the spray openings 7 takes place z. B. by means of a hardened mandrel passing through the material of the Valve seat body 5 is stung, causing the the Spray openings 7 surrounding surveys 36 arise.
  • any shapes of the mandrel can, as in Figs. 2B and FIG. 2C illustrates various shapes and cross sections of FIG Spray openings are generated.
  • Fig. 2B shows a cross-sectional shape of the Spray opening 7, which is trumpet-shaped in Outflow direction of the fuel tapers, while in Fig. 2C a barrel-like cross-sectional shape is shown, which Seen in total also in the outflow direction rejuvenated.
  • the coking of the ejection openings 7 can be reduced become. Since the diameter of the ejection openings 7 is typically about 100 microns, the risk that the Clogging holes 7 clog with coking over time and thus the flow rate impermissibly restricted becomes, relatively large. Due to the tapered shape of the Flow channels 39 in the surveys. 36 is rising Flow velocity of the fuel in Flow direction, whereby a separation of the flow in the ejection opening 7 is prevented. By the adjoining Flow are the flow channels 39 and the Spray holes 7 protected from coking, so that the Spray holes 7 not by coking residue can grow up.
  • a catchment radius 40 which is responsible for the production Avoidance of flow separation in the flow channel 39 is advantageous.
  • the formation of the bumps 36 may be through use a die not further influenced, by making the elevations 36 between the matrix and the mandrel be trapped and thereby an edge 41 of the surveys 36 can be arbitrarily shaped.
  • Figs. 2B and 2C formed the edge 41 each tapering, resulting in the Sense of avoiding the attachment of Coking residues due to the very small Surface of the edge 41 offers.
  • the invention is not limited to those shown Embodiments limited and z. B. for any arranged spray openings 7, for conical Flow channels 39 and for Any design of inwardly opening multi-hole fuel injectors 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)
EP02735065A 2001-05-21 2002-05-07 Brennstoffeinspritzventil Expired - Lifetime EP1395749B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124748A DE10124748A1 (de) 2001-05-21 2001-05-21 Brennstoffeinspritzventil
DE10124748 2001-05-21
PCT/DE2002/001633 WO2002095218A1 (de) 2001-05-21 2002-05-07 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1395749A1 EP1395749A1 (de) 2004-03-10
EP1395749B1 true EP1395749B1 (de) 2005-04-20

Family

ID=7685602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02735065A Expired - Lifetime EP1395749B1 (de) 2001-05-21 2002-05-07 Brennstoffeinspritzventil

Country Status (6)

Country Link
US (1) US7011257B2 (ja)
EP (1) EP1395749B1 (ja)
JP (1) JP2004519621A (ja)
CZ (1) CZ200395A3 (ja)
DE (2) DE10124748A1 (ja)
WO (1) WO2002095218A1 (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256662A1 (de) 2002-12-04 2004-06-17 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004033280A1 (de) * 2004-07-09 2006-02-02 Robert Bosch Gmbh Einspritzventil zur Kraftstoffeinspritzung
DE102004049281A1 (de) * 2004-10-09 2006-04-20 Robert Bosch Gmbh Brennstoffeinspritzventil
US7124963B2 (en) * 2004-11-05 2006-10-24 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
FR2878583A1 (fr) * 2004-11-29 2006-06-02 Renault Sas Buse d'injection de carburant
US7572997B2 (en) * 2007-02-28 2009-08-11 Caterpillar Inc. EDM process for manufacturing reverse tapered holes
DE102008041676A1 (de) * 2008-08-29 2010-03-04 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4623175B2 (ja) * 2008-09-08 2011-02-02 トヨタ自動車株式会社 内燃機関の燃料噴射弁
PL2459867T3 (pl) * 2009-07-30 2014-08-29 3M Innovative Properties Co Dysza i sposób jej wytwarzania
KR101198805B1 (ko) * 2010-12-02 2012-11-07 현대자동차주식회사 차량용 인젝터
DE102012209326A1 (de) * 2012-06-01 2013-12-05 Robert Bosch Gmbh Brennstoffeinspritzventil
KR101337713B1 (ko) * 2012-12-20 2013-12-06 주식회사 현대케피코 연료 미립화 밸브 시트 바디를 구비한 차량용 고압 직분식 인젝터
US10047713B2 (en) * 2013-11-11 2018-08-14 Enplas Corporation Attachment structure of fuel injection device nozzle plate
DE102013225948A1 (de) * 2013-12-13 2015-06-18 Continental Automotive Gmbh Düsenkopf und Fluid-Einspritzventil
WO2016121475A1 (ja) 2015-01-30 2016-08-04 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102020007299B4 (de) * 2020-11-30 2022-10-20 Daimler Truck AG lnjektor zum Einbringen, insbesondere zum direkten Einblasen, von gasförmigem Kraftstoff in einen Brennraum einer Verbrennungskraftmaschine, sowie Gasmotor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE631135C (de) 1934-08-19 1936-06-12 Wanderer Werke Vorm Winklhofer Verfahren zur Herstellung von aus mehreren Teilen zusammengesetzten Dueseneinsaetzen
US4046322A (en) * 1976-05-21 1977-09-06 General Motors Corporation Fuel injection nozzle assembly with stretch element
US4405912A (en) * 1982-01-28 1983-09-20 General Motors Corporation Solenoid assembly and method of making same
FR2541379B1 (fr) * 1983-02-21 1987-06-12 Renault Perfectionnement aux systemes d'injection a commande electromagnetique pour moteur diesel de type pression-temps ou l'aiguille de l'injecteur est pilotee par la decharge puis la charge d'une capacite
GB8827107D0 (en) * 1988-11-19 1988-12-21 Lucas Ind Plc Fuel injection nozzle
JP2996525B2 (ja) 1991-03-20 2000-01-11 株式会社日立製作所 燃料噴射弁
DE4222137B4 (de) 1992-07-06 2006-05-04 Robert Bosch Gmbh Kraftstoff-Einspritzdüse für Diesel-Brennkraftmaschinen
JPH08232813A (ja) 1995-02-27 1996-09-10 Aisan Ind Co Ltd インジェクタ
DE19804463B4 (de) 1998-02-05 2006-06-14 Daimlerchrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
DE19907899A1 (de) * 1999-02-24 2000-08-31 Bosch Gmbh Robert Brennstoffeinspritzventil
US6308901B1 (en) 2000-02-08 2001-10-30 Siemens Automotive Corporation Fuel injector with a cone shaped bent spray

Also Published As

Publication number Publication date
WO2002095218A1 (de) 2002-11-28
JP2004519621A (ja) 2004-07-02
CZ200395A3 (cs) 2004-08-18
DE10124748A1 (de) 2003-02-27
EP1395749A1 (de) 2004-03-10
US7011257B2 (en) 2006-03-14
US20040046063A1 (en) 2004-03-11
DE50202848D1 (de) 2005-05-25

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