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EP0890734B2 - Soupape d'injection de combustible - Google Patents
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EP0890734B2 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP0890734B2
EP0890734B2 EP98109405A EP98109405A EP0890734B2 EP 0890734 B2 EP0890734 B2 EP 0890734B2 EP 98109405 A EP98109405 A EP 98109405A EP 98109405 A EP98109405 A EP 98109405A EP 0890734 B2 EP0890734 B2 EP 0890734B2
Authority
EP
European Patent Office
Prior art keywords
annular shoulder
valve
annular
fuel injection
shoulder
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
EP98109405A
Other languages
German (de)
English (en)
Other versions
EP0890734A3 (fr
EP0890734A2 (fr
EP0890734B1 (fr
Inventor
Bernd Dittus
Stefan Haug
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7835458&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0890734(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0890734A2 publication Critical patent/EP0890734A2/fr
Publication of EP0890734A3 publication Critical patent/EP0890734A3/fr
Application granted granted Critical
Publication of EP0890734B1 publication Critical patent/EP0890734B1/fr
Publication of EP0890734B2 publication Critical patent/EP0890734B2/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
    • F02M61/16—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
    • F02M61/04—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
    • 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

Definitions

  • the invention relates to a fuel injection valve for internal combustion engines with a valve body held in a valve body, in which a valve member is guided axially displaceably in a bore, wherein the bore has a radially expanded pressure chamber into which at least one adjacent to the bore inlet channel opens and with a clamping nut , which clamped with an inner, conical annular shoulder at a height of the pressure chamber arranged annular shoulder of the valve body fitting this against the valve holding body.
  • Such a fuel injection valve is for example from the DE 195 23 243 A1 out.
  • both the annular shoulder of the valve body axially against the holding body spanning clamping nut at its end facing away from the holding body and cooperating with this annular shoulder on the valve body are conical, wherein the angle which includes the conical annular shoulder with the valve member axis is smaller than that Angle enclosed by the conical annular shoulder with the valve member axis.
  • the invention is therefore the object of developing a generic fuel injection valve to the effect that the friction radius and thereby the torque generated on the tightening torque of the clamping nut resulting force is kept as constant as possible.
  • annular shoulder on its side facing the annular shoulder is curved or exactly two angularly adjacent, an edge to form the support to the annular shoulder surfaces forming that in a given distance from the valve member axis exactly gives an annular circumferential support point at which rests the conical annular shoulder in the assembled state.
  • This curved design of the annular shoulder on its annular shoulder facing side to form a ring at a predetermined distance from the valve member axis encircling support point at which abuts the conical annular shoulder in the assembled state has the particularly great advantage that the friction radius is kept largely constant because he is fixed by the geometric design of the ring heel.
  • the friction radius is kept constant, in particular during assembly and in the tightened state of the clamping nut, so that a precise and defined resulting from the tightening torque of the clamping nut resulting force on the valve body.
  • annular shoulder has a substantially circular shape in section, on which the annular shoulder is tangent-shaped to form the annular peripheral support point.
  • the annular shoulder has at least two adjoining surfaces at an angle whose boundary edge forms the annular peripheral support point.
  • the conical annular shoulder of the clamping nut has two differently inclined annular shoulder areas, the radially outer lying rests on the annular peripheral bearing point, and which is exposed to these over an edge subsequent radially inner, a smaller angle to the valve member axis exhibiting annular shoulder area.
  • FIG. 1 illustrated fuel injection valve for internal combustion engines has a valve body 1, which is braced axially with the interposition of an intermediate disc 3 by means of a sleeve-shaped clamping nut 5 on a valve holding body 7.
  • the valve body 1 has an axial bore 9, in which a piston-shaped valve member 11 is guided axially displaceable, which cooperates at its one end with an inwardly directed valve seat 13 in a combustion chamber-side dome 15, in the downstream of the valve seat 13 a plurality of injection openings 17th are arranged.
  • the valve body 1 is a rotationally symmetrical component with an upper thick portion 19 and with a lower, slender shaft portion 21, whose combustion chamber end is closed by the dome 15.
  • the arranged in the upper portion 19 of the bore 9 is formed as a guide bore 23 for the guide member 25 of the valve member 11.
  • undercut pressure chamber 29 is arranged, whose outer boundary 31 is preferably curved and merges into the annular gap 27.
  • a spring 33 inserted in a blind bore of the valve holding body 7 holds the valve member 11 in contact with the valve seat 13 via a spring plate 35 when the injection valve is closed.
  • an inlet channel 37 to the pressure chamber 29 For supplying fuel extends in the upper thicker portion 19 of the valve body 1, starting from the upper end face next to the guide bore 23, an inlet channel 37 to the pressure chamber 29.
  • the inlet channel 37 cuts the pressure chamber 29 from above to the side.
  • the inlet channel 37 extends obliquely to the guide bore 23, wherein the distance of its inlet to the upper end face of the valve body 1 to the axis is greater than the distance of its mouth in the pressure chamber 29, so that the thickness of the intermediate wall 39 near the mouth region of the inlet channel 37 and near the transition of the guide bore 23 into the pressure chamber 29 is small.
  • annular shoulder 45 in an embodiment of the fuel injection valve in section a substantially circular shape, on which the annular shoulder 44 tangent to form an annular peripheral support point 60.
  • the conical annular shoulder 44 of the clamping nut 5 has two annular shoulder regions which are differently inclined relative to the valve member axis 70, the radially outer annular shoulder region 52 of which rests tangentially on the annular shoulder 45. At this annular shoulder portion 52 connects via an edge 55 a radially inner, a smaller angle with the valve member axis 70 enclosing annular shoulder portion 57, which is constantly exposed.
  • annular shoulder 45 on its side facing the annular shoulder 44 two angularly adjacent surfaces 46, 47, whose boundary edge form the annular peripheral support point 60. At this boundary edge of the annular shoulder 44 is applied, which in turn allows a defined friction radius R rub .
  • One of the two surfaces 47 passes on its valve member axis 70 side facing in a substantially perpendicular to the valve member axis 70 extending annular end surface 48, which ensures that the clamping nut 5 is not applied to the annular shoulder 45 in this area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (4)

  1. Soupape d'injection de carburant pour moteurs à combustion interne, comprenant un corps de soupape (1) serré fixement sur un corps de retenue de soupape (7), dans lequel est guidé un organe de soupape (11) déplaçable axialement dans un alésage (9), l'alésage (9) présentant un espace de pression élargi radialement (29), dans lequel débouche au moins un canal d'amenée (37) s'étendant à côté de l'alésage (9) et comprenant un écrou de serrage (5), qui avec un épaulement annulaire (44) interne de forme conique, s'applique contre un retrait annulaire (45) du corps de soupape (1) disposé au niveau de l'espace de pression (29) en le serrant contre le corps de retenue de soupape (7), caractérisée en ce que le retrait annulaire (45) est réalisé avec une forme courbe sur son côté tourné vers l'épaulement annulaire (44), ou présente exactement deux surfaces adjacentes orientées l'une par rapport à l'autre suivant un certain angle formant une arête limite pour former l'appui contre l'épaulement annulaire (44), de telle sorte que l'on obtienne exactement un point d'appui (60) circonférentiel annulaire à une distance prédéterminée (Rreib) de l'axe de l'organe de soupape, contre lequel s'applique l'épaulement annulaire conique (44) dans l'état monté.
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que le retrait annulaire (45) présente en coupe une forme essentiellement circulaire contre laquelle l'épaulement annulaire (44) s'applique tangentiellement en formant le point d'appui circonférentiel annulaire (60).
  3. Soupape d'injection de carburant selon la revendication 2, caractérisée en ce que l'épaulement annulaire conique (44) de l'écrou de serrage (5) présente deux régions d'épaulement d'inclinaison différente (52, 57), dont la région d'épaulement annulaire (52) située radialement à l'extérieur repose sur le point d'appui circonférentiel annulaire (60) et dont la région d'épaulement annulaire (57) s'y raccordant par une arête (55), située radialement à l'intérieur et présentant un plus petit angle par rapport à l'axe de l'organe de soupape (70), est exposée.
  4. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'arête limite entre les au moins deux surfaces (46, 47) adjacentes orientées l'une par rapport à l'autre suivant un certain angle forme le point d'appui circonférentiel annulaire (60).
EP98109405A 1997-07-11 1998-05-23 Soupape d'injection de combustible Expired - Lifetime EP0890734B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19729843 1997-07-11
DE19729843A DE19729843A1 (de) 1997-07-11 1997-07-11 Kraftstoffeinspritzventil

Publications (4)

Publication Number Publication Date
EP0890734A2 EP0890734A2 (fr) 1999-01-13
EP0890734A3 EP0890734A3 (fr) 2001-10-10
EP0890734B1 EP0890734B1 (fr) 2004-11-03
EP0890734B2 true EP0890734B2 (fr) 2010-07-07

Family

ID=7835458

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109405A Expired - Lifetime EP0890734B2 (fr) 1997-07-11 1998-05-23 Soupape d'injection de combustible

Country Status (3)

Country Link
EP (1) EP0890734B2 (fr)
JP (1) JP4181247B2 (fr)
DE (2) DE19729843A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818200A1 (de) 1998-04-23 1999-10-28 Bosch Gmbh Robert Kraftstoffeinspritzventil
DE19956510A1 (de) 1999-11-25 2001-05-31 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19959304A1 (de) 1999-12-09 2001-06-13 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmschinen
DE10018663A1 (de) * 2000-04-14 2001-10-25 Siemens Ag Einspritzventil mit optimierter Flächengeometrie zwischen einem Düsenkörper und einer Spannmutter
WO2002016757A1 (fr) * 2000-08-21 2002-02-28 Volvo Lastvagnar Ab Dispositif detecteur de la position d'une aiguille
DE10114216B4 (de) * 2001-03-23 2006-11-30 Robert Bosch Gmbh Streckgrenzengesteuerte Schraubverbindung
DE10115325A1 (de) * 2001-03-28 2002-10-17 Bosch Gmbh Robert Kraftstoff-Einspritzvorrichtung, insbesondere Injektor, für Brennkraftmaschinen
DE102009029116A1 (de) 2009-09-02 2011-03-03 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE102012217991A1 (de) 2012-10-02 2014-04-03 Continental Automotive Gmbh Düsenbaugruppe für einen Fluidinjektor und Fluidinjektor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2024315A (en) * 1978-07-01 1980-01-09 Lucas Industries Ltd Fuel injection nozzle
JP2537983Y2 (ja) * 1990-12-21 1997-06-04 株式会社ゼクセル 燃料噴射ノズル
JPH07119583A (ja) * 1993-10-26 1995-05-09 Hino Motors Ltd 燃料噴射ノズル
DE19523243B4 (de) 1995-06-27 2009-04-02 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen mit einer Spannmutter mit konisch ausgebildeter Ringschulter

Also Published As

Publication number Publication date
DE19729843A1 (de) 1999-01-14
DE59812198D1 (de) 2004-12-09
JPH1172063A (ja) 1999-03-16
JP4181247B2 (ja) 2008-11-12
EP0890734A3 (fr) 2001-10-10
EP0890734A2 (fr) 1999-01-13
EP0890734B1 (fr) 2004-11-03

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