EP1468185B1 - Ecrou tendeur de buse pour soupape d'injection et procede de production dudit ecrou tendeur de buse - Google Patents

Ecrou tendeur de buse pour soupape d'injection et procede de production dudit ecrou tendeur de buse Download PDF

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Publication number
EP1468185B1
EP1468185B1 EP03704198A EP03704198A EP1468185B1 EP 1468185 B1 EP1468185 B1 EP 1468185B1 EP 03704198 A EP03704198 A EP 03704198A EP 03704198 A EP03704198 A EP 03704198A EP 1468185 B1 EP1468185 B1 EP 1468185B1
Authority
EP
European Patent Office
Prior art keywords
clamping nut
nozzle clamping
nozzle
tube
bearing surface
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 - Fee Related
Application number
EP03704198A
Other languages
German (de)
English (en)
Other versions
EP1468185A1 (fr
Inventor
Dieter Marksteiner
Günter LEWENTZ
Rainer Hardt
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP1468185A1 publication Critical patent/EP1468185A1/fr
Application granted granted Critical
Publication of EP1468185B1 publication Critical patent/EP1468185B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14

Definitions

  • the present invention relates to a nozzle retaining nut for an injection valve according to the preamble of claim 1 and to a method for producing the nozzle retaining nut according to claim 5.
  • Such a nozzle retaining nut is known from the DE 199 15 685 A1 wherein an injection valve for a common rail injection system of a diesel engine is disclosed.
  • the injector has a nozzle holder and an injector attached thereto by the nozzle lock nut.
  • the injection nozzle is held together with the nozzle holder and the nozzle lock nut in a receiving sleeve, with which the injection valve is mounted in the diesel engine.
  • the problem is that at the annular shoulder in the transition region between the support surface and the side wall in the interior of the nozzle lock nut in the load case, a notch effect occurs; this can lead to cracking in the nozzle retaining nut. Therefore, a relatively large radius is provided to reduce the notch effect occurring in this area according to the prior art.
  • a disadvantage in the production of the nozzle retaining nut as a rotating part is further that the nut is turned out of a full piece. This process is time consuming and the Zerspanvolumen relatively large. In the case of the cold extruded part, a first rough shape is created, which is then turned again. Although the cutting volume is significantly lower, it is limited to materials that can be produced as a cold-extruded part.
  • a method for producing a nozzle retaining nut for an injection valve wherein the nozzle retaining nut consists of an outer tube having a larger first free inner diameter and an inner tube having a smaller second free inner diameter, which are first inserted into one another and then firmly connected to each other, wherein a bearing surface is formed by the annular end face of the inner tube in the interior of the nozzle lock nut.
  • DE 197 27 414 A shows an injection valve, the a main body and an outer sleeve-shaped, z.
  • B ferromagnetic valve jacket having as outer pole.
  • the valve sleeve is connected at its upper end fixed to the body by a weld.
  • Object of the present invention is to provide a nozzle lock nut that realizes a large contact surface with small notch effect.
  • a nozzle retaining nut with the features of claim 1 and a nozzle retaining nut prepared according to the method with the features of claim 5.
  • the two-part design of the nozzle retaining nut with the firm connection of a precision steel tube with a particular realized as a simple rotary part connector for use as nozzle retaining nut opens up the possibility of reducing the notch effect with applied axial force and applied torsional moment and the increase in the contact surface of the nozzle body in manufacturing technology simple manner.
  • the resulting Zerspanvolumen is significantly reduced because of the simple structure of the individual components. Also is one high dimensional accuracy with regard to shape and position tolerances due to the use of a precision steel tube ensured.
  • the support surface of the inner tube is formed flat in the contact region with the inner wall of the outer tube.
  • the contact surface of the nozzle retaining nut can be designed to be maximum.
  • an adhesive or solder joint is provided, in contrast to the welded joint - due to the material connection formed thereby - to minimize possible notch effects.
  • the nozzle lock nut consists of a precision steel tube 1 with a first free inner diameter D1 and a tubular rotary part 3 with a smaller second free inner diameter D2.
  • the rotary member 3 has on its outer wall an annular projecting bead 5, which serves as a stop for the steel pipe 1. Furthermore, a circumferential groove 7 is provided for a solder ring on the outer wall of the rotary member 3. For fixed connection of the two tubes 1, 3 to the nozzle retaining nut, the solder is inserted into the annular groove 7 of the rotary member 3 as a ring.
  • the two tubes 1, 3 are put on each other, the nozzle retaining nut is heated and the solder melts and creeps out of the groove 7 in the space between the rotary member 3 and the steel pipe 1.
  • the two tubes are dimensioned according to a clearance fit.
  • the bead 5 is arranged such that a sufficiently large support or support area for the tube 1 is provided on the outer wall of the rotary member 3.
  • the arranged in the interior of the steel tube 1 end face forms a support surface 9 of the nozzle lock nut.
  • the support surface 9 extends perpendicular to the longitudinal direction of the tubes 1, 3. It is formed exactly flat and forms in the boundary region to the inner wall of the steel pipe 1 with this without transition radius a right angle.
  • the bearing surface is in the case of an injector to be mounted (not shown) maximizes given geometry and kept the notch effect occurring low.
  • a small chamfer is provided to facilitate the installation of the injection nozzle.
  • the nozzle retaining nut now biases the injection nozzle against a body of the injection valve (not shown) in a manner known per se from the prior art.
  • the injection nozzle rests on the annular bearing surface 9. Since both the first and the second inner diameter D1, D2 are defined for the respective installation situation of the injection nozzle, the remaining space for the design of the support surface is used optimally according to the invention.
  • the two tubes 1, 3 by a welded joint or a weld 11 are firmly connected.
  • the two tubes have an interference fit, which prevents liquid material from flowing into undesired regions of the nozzle retaining nut during the welding process.
  • Welding is preferably carried out using WIG (Wofram inert gas) welding. This is a well-known fusion welding process in which a molten bath is produced under inert inert gases.
  • the two tubes 1, 3 are firmly connected by an adhesive bond.
  • An adhesive joint 13 is chosen to be as large as possible, wherein the adhesive used is selected adapted to the materials used and the application requirements for the clamping nut.
  • the two tubes 1, 3 are fixedly connected to each other by at least one laser seam 15.
  • the two in Fig. 5 shown laser seams 15 are spaced sufficiently far from the support surface 9 in order to withstand the forces occurring during mounting and operation can.

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)

Abstract

On connaît un type d'écrou tendeur de buse pour soupape d'injection, comportant deux sections dans le sens longitudinal avec des diamètres intérieurs libres (D1, D2) de différentes dimensions. Dans la zone de transition entre la première et la seconde section, une partie en saillie forme une surface d'appui (9) qui s'étend en anneau perpendiculairement au sens longitudinal. L'invention vise à mettre au point un écrou tendeur de buse présentant une grande surface d'appui, avec un effet d'entaille réduit. A cette fin, il est prévu que ledit écrou tendeur de buse comprenne un tube intérieur (3) et un tube extérieur (1) qui présentent les diamètres (D1, D2) de différentes dimensions, sont emboîtés l'un dans l'autre et sont solidarisés de manière fixe. Il est également prévu que la surface d'appui (9) soit formée par la face avant annulaire du tube intérieur (3).

Claims (5)

  1. Ecrou tendeur de buse pour soupape d'injection avec deux sections dans la direction longitudinale ayant des diamètres intérieurs libres (D1, D2) de dimensions différentes, dans lequel, dans une zone de transition de la première vers la seconde section, un palier forme une surface d'appui (9) qui s'étend en forme d'anneau perpendiculairement à la direction longitudinale, caractérisé en ce que l'écrou tendeur de buse est constitué d'un tube intérieur (3) et d'un tube extérieur (1), qui présentent les diamètres intérieurs (D1, D2) de dimensions différentes, sont enfichés l'un dans l'autre et sont fermement raccordés l'un à l'autre, et en ce que la surface d'appui (9) est formée par la surface frontale en forme d'anneau du tube intérieur (3), dans lequel le tube intérieur est formé par un élément rotatif (3), sur la circonférence extérieure duquel est formé un palier de butée (5) pour le tube extérieur (1) enfiché.
  2. Ecrou tendeur de buse selon la revendication 1, caractérisé en ce que le tube extérieur est formé par un tube en acier de précision (1).
  3. Ecrou tendeur de buse selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface
    d'appui (9) a une forme plane dans la zone de contact avec la paroi intérieure du tube extérieur (1).
  4. Ecrou tendeur de buse selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux tubes (1, 3) sont fermement raccordés l'un à l'autre par collage ou brasage.
  5. Procédé de fabrication d'un écrou tendeur de buse pour soupape d'injection, dans lequel l'écrou tendeur de buse est constitué d'un tube extérieur (1) ayant un premier diamètre intérieur libre (D1) plus grand et d'un tube intérieur (3) ayant un second diamètre intérieur libre (D2) plus petit, qui sont d'abord enfichés l'un dans l'autre et ensuite fermement raccordés l'un à l'autre, dans lequel une surface d'appui (9) est formée par la surface frontale en forme d'anneau du tube intérieur à l'intérieur de l'écrou tendeur de buse, caractérisé en ce que le tube intérieur est formé par un élément rotatif, sur le pourtour extérieur duquel un palier de butée (5) est formé pour le tube extérieur (1) enfiché.
EP03704198A 2002-01-24 2003-01-09 Ecrou tendeur de buse pour soupape d'injection et procede de production dudit ecrou tendeur de buse Expired - Fee Related EP1468185B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10202722A DE10202722A1 (de) 2002-01-24 2002-01-24 Düsenspannmutter für Einspritzventil sowie Verfahren zur Herstellung der Düsenspannmutter
DE10202722 2002-01-24
PCT/DE2003/000057 WO2003062630A1 (fr) 2002-01-24 2003-01-09 Ecrou tendeur de buse pour soupape d'injection et procede de production dudit ecrou tendeur de buse

Publications (2)

Publication Number Publication Date
EP1468185A1 EP1468185A1 (fr) 2004-10-20
EP1468185B1 true EP1468185B1 (fr) 2012-05-02

Family

ID=27588031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03704198A Expired - Fee Related EP1468185B1 (fr) 2002-01-24 2003-01-09 Ecrou tendeur de buse pour soupape d'injection et procede de production dudit ecrou tendeur de buse

Country Status (5)

Country Link
US (1) US7475829B2 (fr)
EP (1) EP1468185B1 (fr)
JP (1) JP2005515361A (fr)
DE (1) DE10202722A1 (fr)
WO (1) WO2003062630A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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DE10105368A1 (de) 2001-02-06 2002-08-29 Siemens Ag Kraftstoffeinspritzdüse für eine Brennkraftmaschine
US20060181082A1 (en) * 2001-10-04 2006-08-17 Gray Franklin E Bullthread
DE10215980B4 (de) 2002-04-11 2008-03-27 Siemens Ag Leckageanschluss für einen Kraftstoffinjektor
DE102005005690B3 (de) 2005-02-08 2006-09-28 Siemens Ag Verfahren zur Herstellung eines Düsenkörpers und Düsenkörper
JP4859183B2 (ja) * 2005-10-14 2012-01-25 臼井国際産業株式会社 管部材と相手部材とのろう付け方法
CN102085599A (zh) * 2009-12-03 2011-06-08 鸿富锦精密工业（深圳）有限公司 摩擦搅拌接合方法及摩擦搅拌接合产品
DE102012001926A1 (de) * 2012-02-02 2013-08-08 Benteler Automobiltechnik Gmbh Kraftstoffverteilerleiste
DK181102B1 (en) * 2021-06-24 2022-12-15 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland Fuel valve assembly

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Also Published As

Publication number Publication date
WO2003062630A1 (fr) 2003-07-31
JP2005515361A (ja) 2005-05-26
US7475829B2 (en) 2009-01-13
DE10202722A1 (de) 2003-11-27
EP1468185A1 (fr) 2004-10-20
US20050006898A1 (en) 2005-01-13

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