EP1541862A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1541862A1
EP1541862A1 EP04105632A EP04105632A EP1541862A1 EP 1541862 A1 EP1541862 A1 EP 1541862A1 EP 04105632 A EP04105632 A EP 04105632A EP 04105632 A EP04105632 A EP 04105632A EP 1541862 A1 EP1541862 A1 EP 1541862A1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
injection valve
valve according
swirl
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Withdrawn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
EP04105632A
Other languages
German (de)
English (en)
Inventor
Martin Müller
Andreas Eichendorf
Günther HOHL
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 EP1541862A1 publication Critical patent/EP1541862A1/fr
Withdrawn legal-status Critical Current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
    • F02M61/04—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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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 is based on a fuel injection valve according to the preamble of the main claim.
  • a Fuel injection valve known which a swirl chamber, into the fuel through upstream swirl channels with a tangential directional component when open Fuel injection valve or opened sealing seat flows, having.
  • the fuel is in the swirl chamber after the sealing seat has opened, subjected to a twist and pressurized by the injection opening in the combustion chamber hosed.
  • a disadvantage of the above-mentioned document known fuel injection valve is that in particular in spray-guided combustion, which is usually at Direct fuel injection methods are used, which in the fuel chamber passing fuel jet insufficient exactly at any time exactly reproducible distance at the Spark plug can be passed over. This is through the delayed, only after opening the Fuel injector building up swirl of fuel conditionally. The thereby arising at the beginning, diminished swirling Vorstrahl is particularly in his Spray angle strong of the prevailing in the combustion chamber strong variable backpressure dependent. Likewise, that varies in the Rand Scheme occurring mixing ratio of air and Fuel in dependence of the back pressure and in temporal Course of the injection process considerably.
  • the for spray-guided combustion typical and advantageous Ignition of the fuel-air mixture in the edge region of the Fuel cloud or the fuel jet is characterized considerably more difficult and leads to unreliable ignition.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that by the invention Measures of the Vorstrahl is largely avoided and the Fuel jet with a precisely reproducible and largely independent of the counterpressure spray angle in the Combustion chamber can be injected. Besides, that is Mixing ratio of fuel and oxidant in the Edge region of the injection cloud or the injection jet largely independent of the back pressure, so that the Mixing ratio is exactly reproducible and the Ignition can be performed reliably.
  • the fuel is a Supply path of the swirl chamber and fed via a derived spatially separate discharge path, so that in the swirl chamber at least before opening the A tight fit makes a twist.
  • the swirl generation necessary replacement of fuel in the swirl chamber can be realized particularly easy.
  • the feed path at least partially consists of a supply channel, which extends between a separator and a nozzle body and / or the discharge path at least partially from one Exhaust duct exists, which between the separating body and the valve needle runs.
  • the swirl generation necessary flow can be particularly easy will be realized.
  • the separator body spray side to connect with one side of a guide element and while a guide opening hermetically from one side close tightly.
  • the flow guidance in Fuel injection valve, in particular in the field of Spinning chamber, can be very easy and thus be constructed inexpensively. This is through in the Guide element and / or arranged in the valve closing body Passages through which fuel into the exhaust path can flow, as possible.
  • the passages are in each case facing surfaces of guide element and Valve closing body arranged.
  • the passages can be There particularly easy and without much production effort Arrange.
  • the guide element a has circular guide opening, in which the Valve-closing body under recess of the passages in registration engages, so that the valve closing body or the Valve needle is axially guided and fuel through the Passages can occur.
  • the guide of the valve needle and the Flow guidance in the fuel injection valve, in particular in the discharge area, can be special Space-saving, compact and easy to set up.
  • passages are also dimensioned so that they have a throttling effect on the flow of the fuel, can be an unfavorable flow of fuel, with one concomitant pressure loss through the discharge path, while the seal seat is open and fuel is hosed, largely and easily avoided.
  • FIG. 1 An illustrated in Fig. 1 embodiment of a generic fuel injection valve 1 is in the form a fuel injection valve 1 for Fuel injection systems of mixture compression, spark-ignited internal combustion engines running.
  • the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated 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 has a discharge side Valve-closing body 4, which with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together.
  • In the fuel injection valve 1 is it in the exemplary embodiment to an inward opening fuel injection valve 1, which via a Spray opening 7 has.
  • the nozzle body 2 is through a Seal 8 against an outer pole 9 of a magnetic coil 10th sealed.
  • the magnetic coil 10 is in a coil housing 11 encapsulated and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
  • the Solenoid 10 is connected via an electrical line 19 of one via an electrical plug contact 17 can be fed electrical current.
  • the plug contact 17 is of a Plastic casing 18 surrounded, the inner pole 13th can be injected.
  • 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 the Anchor 20. This is about a first flange 21 with the Valve needle 3 in conjunction, which by a weld 22 is connected to the first flange 21. On the first Flange 21 is supported by a helical return spring 23 which in the present design of the Fuel injection valve 1 by a sleeve 24 Bias is brought.
  • the armature 20 and a Guide element 36 extend fuel channels 30, 31 and 32nd The fuel will go over one at the top of the Fuel injection valve 1 arranged fuel connection 16 fed and filtered by a filter element 25.
  • the Fuel injection valve 1 is through a rubber ring 28th against a not shown Fuel distribution line and by a seal 37 against sealed a cylinder head, not shown.
  • annular damping element 33 On the discharge side of the armature 20 is a annular damping element 33, which consists of a Elastomer material consists, arranged. It lies on one second flange 34, which via a weld 35th cohesively connected to the valve needle 3.
  • the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 from the inner pole 13, causing the with the valve needle 3 in communication first flange 21st moved against the stroke direction.
  • the valve needle 3 is thereby moved in the same direction, causing the Valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • Fig. 2 shows a schematic section of a Embodiment of the invention
  • Fuel injection valve 1 in the region of the nozzle body 3, which is also in the form of a Fuel injection valve 1 for fuel injection systems of mixture-compacting, externally ignited Internal combustion engine is executed.
  • the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
  • Fuel injection valve 1 has the one shown here Fuel injector 1 just below the Abspritzfernen end of the nozzle body 2, laterally in Nozzle body 2 an opening 44.
  • the opening 44 is in This embodiment via a control valve 39 and a downstream pump 38 to a supply line 40, which Fuel feeds, connected.
  • the invention differs Embodiment by a coaxial in the nozzle body 2 extending tubular separator 43 and an intermediate the guide member 36 and the valve seat body. 5 arranged disc-shaped swirl element 41.
  • the tubular separator 43, through which the valve needle 3rd engages through is with its discharge end hermetically close to the sprayer side of the Guiding element 36 joined, for example, cohesively by welding or laser welding.
  • Just above the opening 44, between the opening 44 and the Valve needle guide 14 increases the diameter of the Separator 43 to the inner diameter of the nozzle body. 2 and is there hermetically sealed with the inner circumference of the Nozzle body 2 joined, for example, cohesively.
  • the Valve needle 3 engages with its discharge side arranged Valve closing body 4 by a centered in Guide element 36 and coaxial with the valve closing body. 4 arranged guide opening 47th
  • the fuel passes pressurized through the opening 44 in the nozzle body 2 and flows there through a Feed channel 48, which between the nozzle body 2 and the separating body 43 is formed, in the direction of the guide element 36.
  • the fuel then flows through the fuel channel 32 of the guide element 36 in one or more swirl channels 46th the swirl element 41 and then enters a swirl chamber 42, which in this embodiment by the Guide element 36, the valve closing body 4, the Valve seat body 5 and the disc-shaped swirl element 41st is limited.
  • With closed sealing seat flows over the opening 44 inflowed total amount of fuel over in Area of the guide opening 47 arranged in this figure not shown passages 45 again.
  • FIG. 3 played One An advantageous example of the passages is shown in FIG. 3 played.
  • the fuel that has flowed through the passages 45 flows in one between the valve needle 3 and the interior of the Separator 43 formed discharge channel 49 up to the fuel channels 31 of the upper valve needle guide 14th and on to fuel port 16, where the fuel then again the supply line 40 is supplied.
  • the fuel flows after the passage 45 against the flow direction the incoming fuel, wherein the separating body 43 the separates two flow directions. In other words, flows the fuel via a feed path, which through the Opening 44, the supply channel 48, the fuel channel 32nd and the swirl channel 46 is formed in the swirl chamber 42, with a closed sealing seat via a discharge path, which through the passages 45, the discharge channel 49 and the fuel channel 31 is formed, to drain.
  • the swirl chamber 42 are supplied, in which case over the supply path of the fuel is discharged.
  • Fig. 3 shows a schematic section through the Embodiment of the invention of FIG. 2 in the area the valve closing body 4 in an enlarged view.
  • the passages 45 are in this embodiment as foundednanschliffe executed, with four foundednanschliffe evenly radially are distributed on the circumference of the valve closing body 4.
  • the Surface grinding reduces the diameter of the Valve closing body 4 at the arranged locations, wherein at least a part of the circumference of the valve closing body 4 in Diameter is left to the leadership of the valve needle. 3 to take over in the guide member 36.
  • the passages 45 also For example, in the guide member 36 in the form of axial be arranged extending grooves.
  • the passages 45 can be dimensioned so that they have a throttle effect in Fuel flow cause.
  • the throttle effect can also be on achieved other places in the fuel injection valve 1 be, for example, in the fuel channel 31 of the upper Valve needle guide 14.
  • FIG. 4 shows an embodiment of the guide element 36 of the inventive embodiment of FIG. 3. Clearly visible are the disc-shaped or hole-disc-shaped shape of the guide member 36 and the am Outer circumference evenly distributed introduced rectangular Fuel channels 32. Centered in the guide member 36th arranged sits the circular guide opening 47, which in other embodiments also on the inner circumference attached grooves may have, so that the passages 45th to shape.
  • Fig. 5 shows an embodiment of the swirl element 41 of the Embodiment of the invention of Fig. 3.
  • Six Swirl channels 46 are uniform with a tangential Direction share arranged in the swirl element 41.
  • Fig. 6 shows a schematic representation of the swirl element 41 and the paired guide member 36 of the Embodiment of the invention of FIG. 3. Recognizable In this view, the swirl chamber 46, which is in radial direction axis outside through the swirl element 41 or the swirl channels 46 and inside by this not shown valve closing body 4, which by the Guide opening 47 engages, is limited.
  • Embodiments limited and z. B. also for outward opening fuel injectors or for Fuel injectors with piezo drive can be used.
  • the Features of the embodiments or embodiments can be combined with each other in any way.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP04105632A 2003-12-10 2004-11-09 Injecteur de carburant Withdrawn EP1541862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10357759 2003-12-10
DE2003157759 DE10357759A1 (de) 2003-12-10 2003-12-10 Brennstoffeinspritzventil

Publications (1)

Publication Number Publication Date
EP1541862A1 true EP1541862A1 (fr) 2005-06-15

Family

ID=34485296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105632A Withdrawn EP1541862A1 (fr) 2003-12-10 2004-11-09 Injecteur de carburant

Country Status (3)

Country Link
EP (1) EP1541862A1 (fr)
JP (1) JP2005171995A (fr)
DE (1) DE10357759A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104350269A (zh) * 2012-03-07 2015-02-11 罗伯特·博世有限公司 用于计量流体的阀

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8978364B2 (en) * 2012-05-07 2015-03-17 Tenneco Automotive Operating Company Inc. Reagent injector

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941536A1 (de) * 1979-10-13 1981-04-23 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzduese fuer brennkraftmaschinen
US4365746A (en) * 1979-06-20 1982-12-28 Kabushiki Kaisha Toyota Chuo Kenkyusho Swirl injection valve
DE19835340A1 (de) * 1997-11-03 2000-02-10 Guenter Slowik Verfahren und Einspritzdüse zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine
DE10046305A1 (de) 2000-09-19 2002-04-04 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10051900A1 (de) * 2000-10-19 2002-05-29 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1350947A2 (fr) * 2002-04-04 2003-10-08 Robert Bosch Gmbh Injecteur de carburant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365746A (en) * 1979-06-20 1982-12-28 Kabushiki Kaisha Toyota Chuo Kenkyusho Swirl injection valve
DE2941536A1 (de) * 1979-10-13 1981-04-23 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE19835340A1 (de) * 1997-11-03 2000-02-10 Guenter Slowik Verfahren und Einspritzdüse zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine
DE10046305A1 (de) 2000-09-19 2002-04-04 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10051900A1 (de) * 2000-10-19 2002-05-29 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1350947A2 (fr) * 2002-04-04 2003-10-08 Robert Bosch Gmbh Injecteur de carburant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104350269A (zh) * 2012-03-07 2015-02-11 罗伯特·博世有限公司 用于计量流体的阀

Also Published As

Publication number Publication date
JP2005171995A (ja) 2005-06-30
DE10357759A1 (de) 2005-07-28

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