EP0890734B1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

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Publication number
EP0890734B1
EP0890734B1 EP98109405A EP98109405A EP0890734B1 EP 0890734 B1 EP0890734 B1 EP 0890734B1 EP 98109405 A EP98109405 A EP 98109405A EP 98109405 A EP98109405 A EP 98109405A EP 0890734 B1 EP0890734 B1 EP 0890734B1
Authority
EP
European Patent Office
Prior art keywords
valve
shoulder
annular
fuel injection
bearing point
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
EP0890734B2 (fr
EP0890734A3 (fr
EP0890734A2 (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(B1) "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 one on a valve holding body clamped valve body in which a valve member in a bore is axially displaceable, the Bore has a radially expanded pressure chamber, in the at least one next to the hole Inlet channel opens and with a clamping nut that with an inner, conical ring shoulder a ring shoulder arranged at the level of the pressure chamber Valve body adjacent this against the valve holding body braced.
  • Such a fuel injection valve works, for example from DE 195 23 243 A1.
  • the invention is therefore based on the object generic fuel injector in this regard to further develop that the friction radius and thereby the over the tightening torque generated by the clamping nut Force is kept as constant as possible.
  • This curved formation of the ring heel on his the ring shoulder facing side to form a at a predetermined distance from the valve member axis circular circumferential support point at which the conical ring shoulder in the assembled state, has the particularly great advantage that the friction radius largely is kept constant because it is due to the geometric Interpretation of the ring heel is fixed.
  • the Friction radius is especially during assembly and kept constant when the clamping nut is tightened, so that a precise and defined of the tightening torque resulting clamping force generated on the Valve body results.
  • Ring shoulder on average a substantially circular Form on which the ring shoulder under training of the circular circumferential support point tangent is applied.
  • the boundary edge forms the circular circumferential support point.
  • the conical Ring shoulder of the clamping nut two different inclined annular shoulder areas, the radial external on the circular circumferential support point rests, and which is on this over an edge followed by a radially inner one, a smaller one Annular shoulder area at an angle to the valve member axis exposed.
  • a fuel injector shown in Fig. 1 for Internal combustion engines has a valve body 1 which with the interposition of an intermediate disc 3 by means of a sleeve-shaped clamping nut 5 axially on a valve holding body 7 is tense.
  • the valve body 1 has an axial bore 9, in which is a piston-shaped valve member 11 axially displaceable which is at one end with one after inside valve seat 13 in a combustion chamber side Hill 15 cooperates in the downstream behind the Valve seat 13 arranged a plurality of injection openings 17 are.
  • the valve body 1 is a rotationally symmetrical component with an upper thick section 19 and with a lower, slender shaft part 21, the combustion chamber side End is closed by the crest 15.
  • the one in Upper section 19 is arranged part of the bore 9 as a guide bore 23 for the guide part 25 of the Valve member 11 formed.
  • the part of the bore extending in the valve body shaft 21 9 delimits together with the stem of the valve member 11 an annular gap 27 extending to the valve seat 13.
  • Im upper section 19 is near lower shaft part 21 between the guide bore 23 and the annular gap 27 of the Bore 9 an undercut enlarged in diameter Pressure chamber 29 arranged, the outer boundary 31st is preferably curved and merges into the annular gap 27.
  • One in a blind bore of the valve holding body 7 inserted spring 33 holds the valve member 11 via a Spring plate 35 with the injector closed System on valve seat 13.
  • the inlet channel 37 cuts the pressure chamber 29 laterally from above. To the Diameter of the pressure chamber 29 as small as possible and To keep the cross-section of the mouth sufficiently large, The inlet channel 37 runs obliquely to the guide bore 23, the distance of its inlet at the top End face of the valve body 1 is larger towards the axis than the distance of its mouth into the pressure chamber 29, so that the thickness of the intermediate wall 39 is close to the mouth area of the inlet channel 37 and near the transition of Guide bore 23 in the pressure chamber 29 is small.
  • the sleeve-shaped, designed as a union nut Clamping nut 5 covering the upper section 19 of the valve body 1 overlapping with a nut thread 41 Screw thread 43 screwed onto the valve holding body 7 has an inner conical annular shoulder 44 on which the valve body with a curved ring shoulder 45 in the area of the transition of the upper section 19 in the supports lower slender shaft part 21.
  • the ring shoulder 45 in one embodiment of the fuel injector an essentially circular section Form on which the ring shoulder 44 under training an annular circumferential support point 60 is tangent-shaped.
  • the conical ring shoulder 44 of the clamping nut 5 points in in this case two different from the valve member axis 70 inclined ring shoulder areas, the radially outer Ring shoulder area 52 on ring shoulder 45 is tangent-shaped. At this ring shoulder area 52 closes over an edge 55 a radially inner, a smaller angle with the valve member axis 70 including ring shoulder area 57 which is constantly exposed.
  • the ring shoulder 45 has, on its side facing the ring shoulder 44, two surfaces 46, 47 adjoining one another at an angle, the boundary edge of which forms the annular support point 60.
  • the annular shoulder 44 bears against this boundary edge, which in turn enables a defined friction radius R rub .
  • One of the two surfaces 47 goes on the valve member axis 70 facing side in one essentially Ring face extending perpendicular to the valve member axis 70 48 through which it is ensured that the Clamping nut 5 in this area not on the ring shoulder 45 is present.

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. Injecteur de carburant pour moteurs à combustion interne, comportant un corps de soupape (1) fixement maintenu au niveau d'un corps de maintien de soupape (7), et dans lequel un organe de soupape (11) est introduit de façon mobile axialement dans un alésage (9), l'alésage (9) présentant une chambre de pression (29) élargie radialement, dans laquelle débouche au moins un canal d'arrivée (37) s'étendant à côté de l'alésage (9), et comportant un écrou de serrage (5) qui, avec un épaulement annulaire (44) intérieur configuré de façon conique, au niveau d'un palier annulaire (45) du corps de soupape (1) disposé à la hauteur de la chambre de pression (29), serre celui-ci contre le corps de maintien de soupape (7),
    caractérisé en ce que
    le palier annulaire (45), sur son côté tourné vers l'épaulement annulaire (44), est configuré de façon recourbée ou présente au moins deux surfaces attenantes formant un angle l'une avec l'autre, de telle sorte que l'on obtient, à une distance prédéterminée (Rreib) de l'axe de l'organe de soupape, un point d'appui annulaire circulaire (60) sur lequel repose l'épaulement annulaire (44) dans l'état monté.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le palier annulaire (45) présente en coupe une forme pour l'essentiel circulaire, sur lequel repose tangentiellement l'épaulement annulaire (44) en formant le point d'appui annulaire circulaire (60).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    l'épaulement annulaire conique (44) de l'écrou de serrage (5) présente deux zones d'épaulement (52, 57) inclinées de façon différente, dont la zone d'épaulement annulaire (52) radialement située à l'extérieur repose sur le point d'appui (60) annulaire circulaire, et dont la zone d'épaulement annulaire (57) radialement située à l'intérieur, rattachée à la première par une arête (55) et présentant un angle plus faible par rapport à l'axe de l'organe de soupape (70), est dégagée.
  4. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'arête frontalière entre les au moins deux surfaces (46, 47) attenantes formant un angle l'une avec l'autre, constitue le point d'appui annulaire circulaire (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 true EP0890734B1 (fr) 2004-11-03
EP0890734B2 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
DE60028095D1 (de) * 2000-08-21 2006-06-22 Volvo Lastvagnar Ab Sensor für die nadelposition
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
EP0890734B2 (fr) 2010-07-07
EP0890734A3 (fr) 2001-10-10
JPH1172063A (ja) 1999-03-16
EP0890734A2 (fr) 1999-01-13
JP4181247B2 (ja) 2008-11-12

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