EP1468185A1 - 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

Info

Publication number
EP1468185A1
EP1468185A1 EP03704198A EP03704198A EP1468185A1 EP 1468185 A1 EP1468185 A1 EP 1468185A1 EP 03704198 A EP03704198 A EP 03704198A EP 03704198 A EP03704198 A EP 03704198A EP 1468185 A1 EP1468185 A1 EP 1468185A1
Authority
EP
European Patent Office
Prior art keywords
clamping nut
nozzle clamping
nozzle
bearing surface
tube
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
EP03704198A
Other languages
German (de)
English (en)
Other versions
EP1468185B1 (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.)
Aumovio Germany GmbH
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
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 - Lifetime legal-status Critical Current

Links

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

  • Nozzle clamping nut for injector and method for producing the nozzle clamping nut
  • the present invention relates to a nozzle clamping nut for an injection valve according to the preamble of claim 1 and a method for producing the nozzle clamping nut.
  • Such a nozzle clamping nut is known from DE 199 15 685 AI, an injection valve for a common rail injection system of a diesel engine being disclosed.
  • the injection valve has a nozzle holder and an injection nozzle attached to it by the nozzle clamping nut.
  • the injection nozzle is held together with the nozzle holder and the nozzle clamping nut in a receiving sleeve with which the injection valve is fastened in the diesel engine. It is problematic that a notch effect occurs on the annular shoulder in the transition area between the support surface and the side wall inside the nozzle clamping nut in the event of a load; this can lead to cracking in the nozzle clamping nut.
  • the object of the present invention is to provide a nozzle clamping nut which realizes a large contact surface with a small notch effect.
  • a nozzle clamping nut with the features of patent claim 1 and a nozzle clamping nut produced according to the method with the features of patent claim 7.
  • the two-part design of the nozzle clamping nut with the fixed connection of a precision steel tube with a connecting part, in particular as a simple turned part, for use as a nozzle clamping nut opens up the possibility of reducing the notch effect with the applied axial force and applied torsional moment, as well as increasing the contact surface of the nozzle body in a technically simple manner.
  • the resulting machining volume is significantly reduced due to the simple structure of the individual components.
  • a high degree of dimensional accuracy with regard to shape and position tolerances is also ensured due to the use of a precision steel tube.
  • the contact surface of the inner tube is flat in the area of contact with the inner wall of the outer tube.
  • the contact surface of the nozzle clamping nut can be designed to the maximum.
  • an adhesive or solder connection is provided in order to minimize possible notch effects, in contrast to the welded connection, due to the material connection formed in the process.
  • the nozzle clamping nut consists of a precision steel tube 1 with a first free inside diameter D1 and from a tubular rotary part 3 with a smaller second free inside diameter D2.
  • the rotating part 3 has on its outer wall an annular protruding bead 5, which serves as a stop for the steel tube 1.
  • a circumferential groove 7 is provided for a solder ring on the outer wall of the rotating part 3.
  • the solder is inserted into the annular groove 7 of the rotating part 3 as a ring.
  • the two pipes 1, 3 are placed one on top of the other, the nozzle clamping nut is heated and the solder melts and creeps out of the groove 7 into the space between the rotating part 3 and the steel pipe 1.
  • the two pipes are advantageously dimensioned according to a clearance fit.
  • the bead 5 is arranged such that a sufficiently large support or shoulder area for the tube 1 is provided on the outer wall of the rotating part 3.
  • the end face arranged in the interior of the steel tube 1 forms a support face 9 of the nozzle clamping nut.
  • the support surface 9 extends perpendicular to the longitudinal direction of the tubes 1, 3. It is formed exactly flat and forms a right angle with the inner wall of the steel tube 1 without a transition radius in the border area.
  • the contact surface is Spray valve (not shown) maximizes the given geometry and the resulting notch effect is kept low.
  • a small chamfer is provided to facilitate the assembly of the injection nozzle.
  • the nozzle clamping nut now clamps 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 support 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 bearing surface is optimally used according to the invention.
  • the two tubes 1, 3 are firmly connected to one another by a weld connection or a weld seam 11.
  • the two tubes have an interference fit, which prevents liquid material from flowing into undesired areas of the nozzle clamping nut during the welding process.
  • TIG Wide inert gas
  • This is a known fusion welding process, in which a weld pool is created under inert protective gases.
  • the two tubes 1, 3 are firmly connected to one another by an adhesive connection.
  • An adhesive joint 13 is chosen to be as large as possible, the adhesive used being selected to be adapted to the materials used and the application requirements for the clamping nut.
  • the two tubes 1, 3 are firmly connected to one another by at least one laser seam 15.
  • the two laser seams 15 shown in FIG. 5 are spaced sufficiently far from the support surface 9 in order to be able to withstand the forces that occur during assembly and during operation.
  • the surface pressure can be reduced, since the area available through the contact surface is increased, although the overall diameter of the nozzle clamping nut remains the same.
  • the annular corner region in the transition from the support surface 9 and the inner wall of the steel tube 1 can also be used as the support surface, since a 90 ° angle is formed according to the invention.

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).
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 - Lifetime EP1468185B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10202722 2002-01-24
DE10202722A DE10202722A1 (de) 2002-01-24 2002-01-24 Düsenspannmutter für Einspritzventil sowie Verfahren zur Herstellung der Düsenspannmutter
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 true EP1468185A1 (fr) 2004-10-20
EP1468185B1 EP1468185B1 (fr) 2012-05-02

Family

ID=27588031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03704198A Expired - Lifetime 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
Publication number Priority date Publication date Assignee Title
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
US7475829B2 (en) 2009-01-13
EP1468185B1 (fr) 2012-05-02
US20050006898A1 (en) 2005-01-13
DE10202722A1 (de) 2003-11-27
JP2005515361A (ja) 2005-05-26
WO2003062630A1 (fr) 2003-07-31

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