EP1197651A2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP1197651A2
EP1197651A2 EP01123915A EP01123915A EP1197651A2 EP 1197651 A2 EP1197651 A2 EP 1197651A2 EP 01123915 A EP01123915 A EP 01123915A EP 01123915 A EP01123915 A EP 01123915A EP 1197651 A2 EP1197651 A2 EP 1197651A2
Authority
EP
European Patent Office
Prior art keywords
fuel injection
valve
injection valve
guide sleeve
fuel
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Withdrawn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
EP01123915A
Other languages
German (de)
English (en)
Other versions
EP1197651A3 (fr
Inventor
Hubert Stier
Guenther Hohl
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 EP1197651A2 publication Critical patent/EP1197651A2/fr
Publication of EP1197651A3 publication Critical patent/EP1197651A3/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Withdrawn legal-status Critical Current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
    • 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
    • F02M61/04—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
    • 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
    • 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
    • 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 is based on a fuel injector according to the genus of the main claim.
  • Fuel injectors which are a component for guidance have a valve needle from DE 36 43 523 A1 known. They have a swirl disc upstream the valve sealing seat is arranged with a central Guide bore. Serve to guide the flow Swirl channels covering the upstream of the swirl disk located, fueled room, with a Connect the swirl chamber adjoining the flow direction. When the valve is open, the fuel flows out of the Swirl channels in the swirl chamber, the Speed vector a component in the circumferential direction having.
  • the central bore of the swirl disc takes over the guidance of the valve closing body or the valve needle.
  • the swirl disk is centered by a conical one Seat in the area of the valve seat to which it is due the throttling of the fuel flow in the sealing system is held. To avoid a bypass path for the The fuel in the guide bore is the recess in the swirl disk opposite the valve needle or the Valve closing body closely tolerated.
  • 059 A1 is also a Fuel injector known in which the leadership of the Valve needle or the valve closing body in one assembly is arranged upstream of the sealing seat.
  • a bypass path here the formation of the smallest possible gap between Guide hole and valve needle or valve closing body prevented.
  • a swirl is generated by Holes that have a tangential component and open upstream of the valve sealing seat.
  • the valve needle is guided in a sleeve, which in turn is supported by a downstream conical configuration in the valve seat is centered.
  • the valve seat body and the guide are made in one piece.
  • a disadvantage of the known fuel injection valves the high precision that is involved in the manufacture of the components of the Valve is required.
  • the formation of a twist depends depends essentially on the flow through the swirl channels.
  • On Existing secondary flow path for the fuel leads to a Flow share without peripheral speed and thus worsens the swirl formation and consequently the Atomization of the fuel. Ultimately, this leads to one deteriorated combustion.
  • the bypass flows to an increased fuel flow.
  • the dimensions of the components are subject to tolerance. This can lead to a Angular error of the valve needle or the valve closing body lead in the area of the valve seat.
  • the fuel injector according to the invention with the has the characteristic feature of the main claim the advantage that the use of an elastomer seal Deflection of the valve needle against the central axis of the Fuel injector allows.
  • By stretching or Compression of the seal can both offset the Central axes of the fuel injector and the Guide sleeve as well as an angular error of the central axes be balanced.
  • the twist-forming unit together with the guide sleeve also in a pre-assembly, such as the positive Connection of the guide sleeve with the swirl disk through the Elastomer seal. Then the swirl-forming Unit as a single component of the assembly process of the Fuel injector supplied. A functional test can be carried out on the pre-assembled unit whereby the reject rate of the fuel injector can be reduced.
  • Another advantage is a pressure difference that the sealing effect of by a locking ring tensioned elastomer seal increased.
  • the pressure difference is through fuel channels introduced into the swirl disk reached.
  • the resulting static pressure exceeds the dynamic pressure created by the flowing fuel is generated on the side of the valve closing body.
  • the fuel injector 1 is in the form of a Fuel injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines executed.
  • the fuel injector 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown 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 in operative connection with a Valve closing body 4 with one on one Valve seat body 5 arranged valve seat surface 6 into one Sealing seat interacts.
  • the fuel injector 1 in the exemplary embodiment it is an inward direction opening, electromagnetically operated fuel injector 1, which has a spray opening 7.
  • the Nozzle body 2 is against the outer pole 9 by a seal 8 sealed a magnetic coil 10.
  • the solenoid 10 is in a coil housing 11 encapsulated and on one Coil carrier 12 wound, which on an inner pole 13 of the Solenoid coil 10 is present.
  • the inner pole 13 and the outer pole 9 are separated from each other by a gap 26 and support itself on a connecting component 29.
  • the solenoid 10 is via a line 19 from an electrical Plug contact 17 energized electrical current.
  • the Plug contact 17 is from a plastic casing 18 surrounded, which may be molded onto the inner pole 13.
  • the valve needle 3 is in a valve needle guide 14 led, which is disc-shaped.
  • a paired adjusting disc 15 is used for stroke adjustment the other side of the shim 15 is a Anchor 20.
  • This stands over a first flange 21 non-positively in connection with the valve needle 3, which for example via a weld seam 22 with the first Flange 21 is connected.
  • a return spring 23 which in the present Design of the fuel injector 1 through a sleeve 24 is brought under tension.
  • valve needle guide 14 in the armature 20 and in the Swirl disk 35 extend fuel channels 30a, 30b, 30c or swirl channels 36, which the fuel, which has a central fuel supply 16 supplied and by a Filter element 25 is filtered to the spray opening 7 in direct the valve seat body 5.
  • the fuel injector 1 is not by a seal 28 against one shown distribution line sealed.
  • the fuel injector 1 has a swirl disk 35 above the valve seat body 5, which by an elastomer seal 32 against one Guide sleeve 33 is sealed.
  • swirl channels 36 are arranged in the swirl disk with a tangential component in a swirl chamber 37 open out. With fuel injector 1 open the fuel to be injected has a peripheral speed, the one for fanning out the fuel jet in the not shown combustion chamber leads.
  • the swirl channels 36 are included the upstream of the swirl disk 35 with Fuel depressed volume through fuel channels 30c connected.
  • the positional tolerances of the valve needle 3 that occur the central axis 31 of the fuel injector 1 by elastic deformation of the elastomer seal 32 compensated.
  • the central axis of the valve needle 3 axially sliding guide sleeve 33 changes their position together with the central axis of the valve needle 3 relative to the Central axis 31 of the fuel injector 1.
  • the hydraulically sealing gap between the valve needle 3 and the guide sleeve 33 therefore remains in the case of deflections Valve needle 3 unchanged and can be narrow accordingly be tolerated.
  • FIG. 2 An embodiment of an inventive Fuel injector 1 is shown in FIG. 2.
  • the Swirl disk 35 has a recess 38 in its Inside the guide sleeve 33, the elastomer seal 32 and a locking ring 34 are arranged. Downstream shows the Swirl disk 35 has a through opening 43, the radial one Dimension is such that the central axis of the Valve needle 3 with respect to the central axis 31 of the Fuel injector 1 deflected by an angle can be without the deflection of the valve needle 3 by the swirl disk 35 is limited.
  • the guide sleeve 33 has a recess 40, the radial expansion with the radial expansion of the Valve needle 3 corresponds so that the between Guide sleeve 33 and valve needle 3 forming gap is hydraulically sealed.
  • the elastomer seal 32 is attached, whose length extension is greater than that of Guide sleeve 33 so that the guide sleeve 33 in axial Direction at both ends of the elastomer seal 32 is towered over.
  • the Elastomer seal 32 directed radially outwards Sealing lips 45a, 45b.
  • the downstream sealing lip 45a lies on the upstream side of the swirl disk 35.
  • the upstream sealing lip 45b lies on the downstream side of the locking ring 34.
  • the Locking ring 34 is in the recess 38 of the Swirl disk 35, e.g. by means of a press connection, attached and keeps the sealing lips 45a, 45b in sealing contact. Further the locking ring 34 has a central one Through opening 41 on the valve needle 3rd is penetrated. The through opening 41 is radial Direction dimensioned so that a deflection of the central axis the valve needle 3 not by touching the Valve needle 3 is limited to the locking ring 34.
  • the swirl disk 35 preferably faces in the axial direction Pressure equalization channels 39 on that with fuel depressed volume upstream of the locking ring 34 with connect a seal space 46.
  • Pressure equalization channels 39 can also in the Lock ring 34 may be arranged.
  • Fuel injector 1 is the Elastomer seal 32 both with the guide sleeve 33 as also with the swirl disk 35 by positive locking connected.
  • the swirl disk 35 has on its upstream Page has a circumferential groove 48, the width of which changes with increasing depth of penetration into the swirl disk 35 enlarged.
  • the elastomer seal 32 has at its downstream end a radial extension 49a, the cross section of which with the described geometry of the groove 48 corresponds to and Forming a positive connection 51a in the groove 48 is introduced.
  • the radial recess 40 of the guide sleeve 33 is again hydraulically sealed against the valve needle 3 and has a collar-shaped at its upstream end Extension 47 on.
  • the collar-shaped extension 47 is in their radial expansion is smaller than the inner diameter of the nozzle body 2, so that a deflection of the central axis the guide sleeve 33 with respect to the central axis 31 of the Fuel injector 1 is possible.
  • a circumferential groove 50 introduced which preferably has the same geometry, like the groove 48 in the swirl disk 35.
  • At the upstream end of the elastomer seal 32 is one circumferential radial extension 49b arranged with the circumferential groove 50 corresponds and by means of which Guide sleeve 33 and elastomer seal 32 a Form positive connection 51b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP01123915A 2000-10-10 2001-10-06 Soupape d'injection de combustible Withdrawn EP1197651A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000150056 DE10050056A1 (de) 2000-10-10 2000-10-10 Brennstoffeinspritzventil
DE10050056 2000-10-10

Publications (2)

Publication Number Publication Date
EP1197651A2 true EP1197651A2 (fr) 2002-04-17
EP1197651A3 EP1197651A3 (fr) 2004-01-14

Family

ID=7659218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01123915A Withdrawn EP1197651A3 (fr) 2000-10-10 2001-10-06 Soupape d'injection de combustible

Country Status (2)

Country Link
EP (1) EP1197651A3 (fr)
DE (1) DE10050056A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1811166A1 (fr) * 2006-01-24 2007-07-25 Siemens Aktiengesellschaft Ensemble à vanne pour une soupape d'injection et soupape d'injection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643523A1 (de) 1986-12-19 1988-06-30 Bosch Gmbh Robert Einspritzventil fuer kraftstoffeinspritzanlagen
DE19625059A1 (de) 1996-06-22 1998-01-02 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659115B1 (fr) * 1990-03-02 1992-05-15 Procal Joint d'etancheite pour injecteur de moteur a combustion interne.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643523A1 (de) 1986-12-19 1988-06-30 Bosch Gmbh Robert Einspritzventil fuer kraftstoffeinspritzanlagen
DE19625059A1 (de) 1996-06-22 1998-01-02 Bosch Gmbh Robert Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1811166A1 (fr) * 2006-01-24 2007-07-25 Siemens Aktiengesellschaft Ensemble à vanne pour une soupape d'injection et soupape d'injection
US7607636B2 (en) 2006-01-24 2009-10-27 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve

Also Published As

Publication number Publication date
DE10050056A1 (de) 2002-04-18
EP1197651A3 (fr) 2004-01-14

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