EP1893866B1 - Soupape pour commander une soupape d'injection d'un moteur a combustion interne - Google Patents

Soupape pour commander une soupape d'injection d'un moteur a combustion interne Download PDF

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Publication number
EP1893866B1
EP1893866B1 EP06725667A EP06725667A EP1893866B1 EP 1893866 B1 EP1893866 B1 EP 1893866B1 EP 06725667 A EP06725667 A EP 06725667A EP 06725667 A EP06725667 A EP 06725667A EP 1893866 B1 EP1893866 B1 EP 1893866B1
Authority
EP
European Patent Office
Prior art keywords
valve
annular shoulder
sealing ring
bore
sealing
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
EP06725667A
Other languages
German (de)
English (en)
Other versions
EP1893866A1 (fr
Inventor
Martin Boehm
Helmut Clauss
Arnad Beganovic
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 EP1893866A1 publication Critical patent/EP1893866A1/fr
Application granted granted Critical
Publication of EP1893866B1 publication Critical patent/EP1893866B1/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
    • F02M61/04—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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M55/004—Joints; Sealings

Definitions

  • the invention relates to a valve for controlling an injection valve of an internal combustion engine according to the preamble of patent claim 1.
  • Such a valve is for example by the WO 2004/036033 A known.
  • a known control valve comprises a valve piece which is arranged in a stepped bore of the valve housing to form a high-pressure side annular space which is sealed relative to the valve housing by sealing contact of the valve member at a first annular shoulder of the bore and axially spaced therefrom by a sealing ring, with its one axial end face (sealing edge) bears against a second annular shoulder of the bore.
  • the other axial end face is axially spaced from an annular shoulder of the valve piece which is provided in the region of the first annular shoulder of the bore and axially delimits the high-pressure-side annular space.
  • valve according to the invention with the features of claim 1 has the advantage that the mounted under bias sealing ring seals the annulus immediately after installation.
  • the annular shoulder of the valve piece is chamfered and the annular shoulder of the bore conical, so that the pressure prevailing in the annulus high pressure presses the sealing ring to the two annular shoulders. The higher the high pressure, the greater the contact pressure and consequently the sealing of the annulus (self-sealing effect).
  • valve 1 serves to control an injection valve (injector) of an internal combustion engine and has an annular space 2 , which has a Fuel line 3 is connected to a high-pressure fuel storage (CommonRail), not shown.
  • CommonRail high-pressure fuel storage
  • the high-pressure side annular space 2 is formed in a stepped bore 4 of the valve housing 5 by a cylindrical, metallic valve piece 6 , which with a flange 7 on a first, in Fig.1 upper annular shoulder 8 of the bore 4 sealingly rests and - axially spaced therefrom - is sealed by a high-pressure sealing ring (O-ring) 9 relative to the valve housing 5.
  • a high-pressure sealing ring (O-ring) 9 relative to the valve housing 5.
  • the sealing ring 9 has a trapezoidal cross-section and is pressed between a tapered annular shoulder 10 of the valve member 6 and a lower, conical annular shoulder 11 of the bore 4, that is clamped with bias. Already due to this bias seals the sealing ring 9 in the clamped state, the annulus 2 immediately.
  • the sealing ring 9 is parallel with its two sealing flanks on the annular shoulders 10, 11 and has, in the embodiment shown, the tapered annular shoulder 10 and the conical annular shoulder 11 at the same angle ⁇ to the longitudinal axis, in cross-section the shape of a symmetrical trapezoid ,
  • the outer diameter d of the sealing ring 9 is smaller than the bore diameter D, so that the pressure prevailing in the annular space 2 high pressure (rail pressure) presses the sealing ring 9 radially inwardly of the annular shoulders 10, 11.
  • the higher the rail pressure the greater the contact pressure and consequently the sealing of the annulus 2 (self-sealing effect).
  • the contact force is generated, which presses the sealing ring 9 to the annular shoulder 10, 11 and ensures the sealing of the annulus2.
  • the upper end of a piston-shaped valve or actuator 12 of the injector is slidably guided in a guide bore 13 of the valve member 6 and limited in the valve piece 6 a control chamber 14.
  • the control chamber 14 is connected via an inlet throttle 15 with the annular space 2 and opens via an outlet throttle 16th in a valve seat opening of a conical valve seat 17, which is provided on the valve or actuator 12 facing away from the upper end side of the valve member 6 for cooperation with a valve closure member 18 .
  • valve closing member 18 In the closed valve position, not shown, in which the valve closing member 18 rests against the valve seat 17 and thus closes the valve seat opening, the control chamber 14 is acted upon by rail pressure and thereby the valve or actuator 12 of the injector moved to its lower position.
  • the valve closing member 18 In the open valve position shown, the valve closing member 18 is lifted from the valve seat 17 and the valve seat opening released, whereby the control chamber 14 is depressurized and the valve or actuator 12 is moved to its upper position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (10)

  1. Soupape (1) pour commander une soupape d'injection d'un moteur à combustion interne, comprenant un élément de soupape (6) qui est disposé dans un alésage étagé (4) du boîtier de soupape (5) en formant un espace annulaire (2) côté haute pression, qui est rendu étanche par rapport au boîtier de soupape (5) par application hermétique de l'élément de soupape (6) contre un premier épaulement annulaire (8) de l'alésage (4), et à distance de celui-ci, par une bague d'étanchéité (9 ; 9' ; 9"), qui s'applique avec l'un de ses flancs d'étanchéité axiaux ou l'une de ses arêtes d'étanchéité axiales contre un deuxième épaulement annulaire (11) de l'alésage (4),
    caractérisée en ce que
    la bague d'étanchéité (9 ; 9' ; 9") s'applique avec son autre flanc d'étanchéité axial ou son autre arête d'étanchéité axiale contre un épaulement annulaire (10) de l'élément de soupape (6).
  2. Soupape selon la revendication 1, caractérisée en ce que la bague d'étanchéité (9 ; 9' ; 9") est serrée avec précontrainte entre l'épaulement annulaire (10) de l'élément de soupape (6) et le deuxième épaulement annulaire (11) de l'alésage (4).
  3. Soupape selon la revendication 1 ou 2, caractérisée en ce que l'épaulement annulaire (10) de l'élément de soupape (6) est biseauté et le deuxième épaulement annulaire (11) de l'alésage (4) est conique.
  4. Soupape selon l'une quelconque des revendications précédentes, caractérisée en ce que la bague d'étanchéité (9 ; 9') a une forme trapézoïdale en section transversale.
  5. Soupape selon la revendication 4, caractérisée en ce que les deux flancs d'étanchéité axiaux de la bague d'étanchéité (9) s'étendent approximativement parallèlement à l'épaulement annulaire biseauté (10) et à l'épaulement annulaire conique (11).
  6. Soupape selon la revendication 4 en combinaison avec la revendication 3, caractérisée en ce que les deux flancs d'étanchéité axiaux de la bague d'étanchéité (9') s'étendent suivant un angle plus aigu (β) par rapport à l'axe longitudinal du boîtier de soupape (5) ou de l'élément de soupape (6) que les épaulements annulaires (10, 11).
  7. Soupape selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la bague d'étanchéité (9") est approximativement rectangulaire en section transversale.
  8. Soupape selon l'une quelconque des revendications 3 à 7, les revendications 4 et 7 se rapportant chacune à la revendication 3, caractérisée en ce que l'épaulement annulaire biseauté (10) et l'épaulement annulaire conique (11) s'étendent suivant approximativement le même angle (α) par rapport à l'axe longitudinal du boîtier de soupape (5) ou de l'élément de soupape (6).
  9. Soupape selon l'une quelconque des revendications précédentes, caractérisée en ce que le diamètre extérieur (d) de la bague d'étanchéité (9 ; 9' ; 9") est inférieur au diamètre de l'alésage (D) de l'espace annulaire (2).
  10. Soupape selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un espace de commande (14) est limité dans un alésage de guidage (13) de l'élément de soupape (6) par un organe de soupape ou de commande (12) de la soupape d'injection, guidé de manière déplaçable dans celui-ci, l'espace de commande (14) étant connecté par le biais d'un étranglement d'entrée (15) à l'espace annulaire côté haute pression (2), et débouchant par le biais d'un étranglement de sortie (16) dans une ouverture de siège de soupape d'un siège de soupape (17), qui est prévu du côté frontal de l'élément de soupape (6) opposé à l'organe de soupape ou de commande (12), pour coopérer avec un organe de fermeture de soupape mobile (18).
EP06725667A 2005-06-09 2006-04-10 Soupape pour commander une soupape d'injection d'un moteur a combustion interne Expired - Lifetime EP1893866B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005026513A DE102005026513A1 (de) 2005-06-09 2005-06-09 Ventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
PCT/EP2006/061466 WO2006131411A1 (fr) 2005-06-09 2006-04-10 Procede de commande de la soupape d'injection d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1893866A1 EP1893866A1 (fr) 2008-03-05
EP1893866B1 true EP1893866B1 (fr) 2009-08-19

Family

ID=36600206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06725667A Expired - Lifetime EP1893866B1 (fr) 2005-06-09 2006-04-10 Soupape pour commander une soupape d'injection d'un moteur a combustion interne

Country Status (5)

Country Link
EP (1) EP1893866B1 (fr)
CN (1) CN101194098B (fr)
AT (1) ATE440215T1 (fr)
DE (2) DE102005026513A1 (fr)
WO (1) WO2006131411A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007008262A1 (de) * 2007-02-20 2008-08-21 Robert Bosch Gmbh Kraftstoffeinspritzventil zur Kraftstoffeinspritzung in Brennkraftmaschinen
GB2639241A (en) * 2024-03-13 2025-09-17 Cummins Inc Injection assembly, bearing assembly, and fuel injector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094439B1 (fr) * 1982-05-13 1986-12-30 Hydrotechnik GmbH Raccord à soupape pour système fluidique
DE19802244A1 (de) * 1998-01-22 1999-07-29 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP3486383B2 (ja) * 1999-12-17 2004-01-13 株式会社日立ユニシアオートモティブ ガス噴射弁
EP1395748B1 (fr) * 2001-05-21 2005-05-18 Robert Bosch Gmbh Element d'etancheite haute pression pour injecteurs
JP2004137915A (ja) * 2002-10-15 2004-05-13 Bosch Automotive Systems Corp 燃料噴射弁のシール構造

Also Published As

Publication number Publication date
CN101194098A (zh) 2008-06-04
WO2006131411A1 (fr) 2006-12-14
DE502006004601D1 (de) 2009-10-01
ATE440215T1 (de) 2009-09-15
DE102005026513A1 (de) 2006-12-14
EP1893866A1 (fr) 2008-03-05
CN101194098B (zh) 2011-01-05

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