EP1520982A2 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1520982A2
EP1520982A2 EP04023132A EP04023132A EP1520982A2 EP 1520982 A2 EP1520982 A2 EP 1520982A2 EP 04023132 A EP04023132 A EP 04023132A EP 04023132 A EP04023132 A EP 04023132A EP 1520982 A2 EP1520982 A2 EP 1520982A2
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
seal
valve according
valve
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
EP04023132A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1520982B1 (de
EP1520982A3 (de
Inventor
Eckard Bodenhausen
Horst Kirschner
Gerd Schollenberger
Markus Becker
Lutz Schuetze
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
Parker Hannifin GmbH and Co KG
Original Assignee
Robert Bosch GmbH
Parker Hannifin GmbH and Co KG
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, Parker Hannifin GmbH and Co KG filed Critical Robert Bosch GmbH
Publication of EP1520982A2 publication Critical patent/EP1520982A2/de
Publication of EP1520982A3 publication Critical patent/EP1520982A3/de
Application granted granted Critical
Publication of EP1520982B1 publication Critical patent/EP1520982B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • Fuel injection valves for the injection of Point fuel into a suction pipe of an internal combustion engine usually a seal in the downstream area of the Valve housing, whereby this against the suction pipe is sealed.
  • Such a seal is for example from the DE 26 53 674 A1.
  • the seal is on the one hand via the fuel injection valve and on the other hand a connecting piece of the suction tube inverted and bellows educated.
  • a disadvantage of the seals described is in particular, that they only conditionally Fuel injector can compensate. Lies a such center offset ago, transverse forces acting on the Fuel injection valve, which u. U. cause the Sealing effect of the seal is no longer guaranteed.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the seal a bead and a trained cuff with folded edge having.
  • a support ring integrated which has an L-shaped profile and on the one hand the stability and on the other hand the one Center offsets balancing function of the seal allows.
  • the sleeve funnel-shaped formed and made of an elastic material is. This can cause center offsets of the Fuel injection valve without affecting the Compensated sealing effect of the seal in a simple manner become.
  • the suction tube can advantageously have a chamfer.
  • Fig. 1 shows for better understanding of inventive measures first in one sectional, schematized sectional view one Longitudinal section through the discharge-side part of a Fuel injection valve 1 according to the prior art, which in particular for injecting fuel into a not shown suction tube of an internal combustion engine suitable is.
  • the fuel injection valve 1 comprises a magnetic coil 2, which is wound on a bobbin 3.
  • the coil carrier 3 is encapsulated in a valve housing 4.
  • the bobbin 3 is of a valve sleeve. 5 passed through, which is tubular and one in it comprises spread or welded support tube 6, which serves as the inner pole of the solenoid 2.
  • the solenoid 2 for example, the valve housing. 4 serve.
  • Downstream of the support tube 6 is an anchor. 7 arranged in one piece with a valve needle. 8 is trained.
  • Throughflow openings 9 are provided, which the the Fuel injector 1 flowing through the fuel lead a sealing seat.
  • a ring filter 10th be arranged for filtering the fuel.
  • the Valve needle 8 is preferably by welding in Operative connection with one in the embodiment spherical valve closing body 11, which with a Valve seat body 12 forms a sealing seat. Downstream of the Sealing seat is in a spray disk 13 at least an injection orifice 14 is formed from which the fuel is injected into the intake manifold, not shown.
  • the armature 9 is in the idle state of Fuel injection valve 1 of a return spring 15 so urged that the fuel injection valve 1 by the Pressure of the valve closing body 11 on the valve seat body 12 is kept closed.
  • the return spring 15 is in a recess 16 of the armature 7 and the support tube. 6 arranged and is by an adjusting sleeve 17 Preloaded.
  • the inlet side of the adjusting sleeve 17 is a cup-shaped Filter element 18 in the valve sleeve 5 preferably pressed.
  • the fuel passing through a central Fuel supply 19 is fed, flows through the Fuel injection valve 1 through the recess 16 and the Through openings 9 to the sealing seat and the injection opening 14th
  • the fuel injection valve 1 is closed as soon as the the solenoid coil 2 energizing off and the Magnetic field is degraded so far that the return spring 15th pushes the armature 7 from the support tube 6, whereby the Valve needle 8 moves in the outflow direction and the Valve-closing body 11 touches on the valve seat body 12.
  • a disadvantage of the described sealing ring 21 is in particular, that the fuel injection valve 1 must be installed center-centered, as conditioned by the Installation position and the shape of the sealing ring 21 no Degrees of freedom are available for offsets.
  • FIG. 2 illustrated embodiment of an inventive designed fuel injection valve 1 a funnel-shaped seal 24 'instead of the sealing ring 21, which is pushed onto the Kunststoffumspritzung 23.
  • the seal 24 'in this case has an annular bead 25th on, which pushed onto the plastic extrusion 23 is and in a narrowing 26 of the Fuel injection valve 1 engages, and a in Outflow direction widening funnel-shaped elastic Cuff 27, which has a projecting edge 28, the is folded radially inward.
  • a support ring 31 inserted to the cuff 27 founded on an inner wall 29 of a Suction tube 30 .
  • the Support ring 31 has a rectangular L-shaped Cross-section, the legs 32 parallel to Outflow or perpendicular thereto in the direction of the Fuel injection valve 1 are arranged.
  • the support ring 31 ensures that on the one hand the Endurance stability of the seal 24 'is guaranteed and that on the other hand, the fuel injection valve 1 both in Suction operation as well as operated in charged operation can be.
  • the seal 24 ' is by a deferred, preferably metallic ring 33 on the Fuel injection valve 1 secured. This ensures that even when charged operation on the bead 25 no Leakage occurs.
  • the fuel injection valve 1, which is pre-assembled in a modular manner and then into the suction tube 30 is inserted through the elastic seal 24 'so Align that it is stored on the one hand without lateral force and on the other hand, the seal 24 'still their sealing function can exercise.
  • center offsets of at least ⁇ 1 mm are compensated, as shown in Fig. 2.
  • the elastic funnel-shaped seal 24 ' is doing asymmetrically deformed.
  • the seal 24 '. is designed so that as possible many standard parts for the fuel injector can be used to put in a given Suction tube geometry to fit.
  • the invention is not limited to that shown Embodiment limited and for any construction of fuel injection valves 1, z.
  • Fuel injection valves 1 with piezoelectric or magnetostrictive actuators as well as for use in Internal combustion engines for supercharged and intake manifold operation suitable.
EP04023132A 2003-10-02 2004-09-29 Brennstoffeinspritzventil Expired - Fee Related EP1520982B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10345965A DE10345965A1 (de) 2003-10-02 2003-10-02 Brennstoffeinspritzventil
DE10345965 2003-10-02

Publications (3)

Publication Number Publication Date
EP1520982A2 true EP1520982A2 (de) 2005-04-06
EP1520982A3 EP1520982A3 (de) 2005-10-12
EP1520982B1 EP1520982B1 (de) 2008-05-21

Family

ID=34306239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04023132A Expired - Fee Related EP1520982B1 (de) 2003-10-02 2004-09-29 Brennstoffeinspritzventil

Country Status (3)

Country Link
US (1) US7093585B2 (ja)
EP (1) EP1520982B1 (ja)
DE (2) DE10345965A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052255B4 (de) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
US20100148100A1 (en) * 2008-12-17 2010-06-17 Parker Hannifin Corporation Media isolated piezo valve
DE102009055087A1 (de) * 2009-12-21 2011-06-22 Robert Bosch GmbH, 70469 Einspritzventil
DE102015225055A1 (de) * 2015-12-14 2017-06-14 Robert Bosch Gmbh Kraftstoffinjektor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022727A (en) * 1978-06-03 1979-12-19 Bayerische Motoren Werke Ag Fuel injection nozzle fastening
US4296887A (en) * 1978-09-15 1981-10-27 Robert Bosch Gmbh Heat protected fuel injection plug for internal combustion engines
DE3806906A1 (de) * 1988-03-03 1989-09-14 Opel Adam Ag Vorrichtung zur befestigung eines in einen saugkanal einer brennkraftmaschine einspritzenden kraftstoffeinspritzventils
JPH10281293A (ja) * 1997-04-08 1998-10-23 Nok Corp 密封装置
JP2000170628A (ja) * 1998-12-10 2000-06-20 Mitsubishi Electric Corp 燃料噴射弁及びシールリング
DE10235445A1 (de) * 2001-08-03 2003-02-13 Rft Spa Mit einer Dichtung versehenes Einspritzaggregat für eine Brennkraftmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2149817B2 (de) * 1971-10-06 1975-08-21 Daimler-Benz Ag, 7000 Stuttgart Anordnung eines Kraftstoffeinspritzventils zur elektronisch gesteuerten Benzineinspritzung in den Ansaugkanal einer Brennkraftmaschine
US4201172A (en) * 1972-07-10 1980-05-06 Robert Bosch Gmbh Fuel injection nozzle assembly for internal combustion engines
DE3000061C2 (de) * 1980-01-03 1993-10-14 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
DE19743103A1 (de) * 1997-09-30 1999-04-01 Bosch Gmbh Robert Wärmeschutzhülse
DE10027662A1 (de) * 2000-06-03 2001-12-06 Bosch Gmbh Robert Dichtmittel und Niederhalter für ein Brennstoffeinspritzventil
DE10108194A1 (de) * 2001-02-21 2002-08-29 Bosch Gmbh Robert Dichtvorrichtung für ein Brennstoffeinspritzventil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022727A (en) * 1978-06-03 1979-12-19 Bayerische Motoren Werke Ag Fuel injection nozzle fastening
US4296887A (en) * 1978-09-15 1981-10-27 Robert Bosch Gmbh Heat protected fuel injection plug for internal combustion engines
DE3806906A1 (de) * 1988-03-03 1989-09-14 Opel Adam Ag Vorrichtung zur befestigung eines in einen saugkanal einer brennkraftmaschine einspritzenden kraftstoffeinspritzventils
JPH10281293A (ja) * 1997-04-08 1998-10-23 Nok Corp 密封装置
JP2000170628A (ja) * 1998-12-10 2000-06-20 Mitsubishi Electric Corp 燃料噴射弁及びシールリング
DE10235445A1 (de) * 2001-08-03 2003-02-13 Rft Spa Mit einer Dichtung versehenes Einspritzaggregat für eine Brennkraftmaschine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 01, 29. Januar 1999 (1999-01-29) & JP 10 281293 A (NOK CORP), 23. Oktober 1998 (1998-10-23) *
PATENT ABSTRACTS OF JAPAN Bd. 2000, Nr. 09, 13. Oktober 2000 (2000-10-13) & JP 2000 170628 A (MITSUBISHI ELECTRIC CORP), 20. Juni 2000 (2000-06-20) *

Also Published As

Publication number Publication date
DE10345965A1 (de) 2005-07-07
US7093585B2 (en) 2006-08-22
US20050121001A1 (en) 2005-06-09
DE502004007209D1 (de) 2008-07-03
EP1520982B1 (de) 2008-05-21
EP1520982A3 (de) 2005-10-12

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