EP0971120A2 - Elément de raccordement pour une conduite à haute pression - Google Patents

Elément de raccordement pour une conduite à haute pression Download PDF

Info

Publication number
EP0971120A2
EP0971120A2 EP99113229A EP99113229A EP0971120A2 EP 0971120 A2 EP0971120 A2 EP 0971120A2 EP 99113229 A EP99113229 A EP 99113229A EP 99113229 A EP99113229 A EP 99113229A EP 0971120 A2 EP0971120 A2 EP 0971120A2
Authority
EP
European Patent Office
Prior art keywords
connection element
element according
cone
sealing surface
pressure line
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
EP99113229A
Other languages
German (de)
English (en)
Other versions
EP0971120A3 (fr
EP0971120B1 (fr
Inventor
Rolf Prillwitz
Bernd Raible
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.)
LOrange GmbH
Original Assignee
LOrange 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 LOrange GmbH filed Critical LOrange GmbH
Publication of EP0971120A2 publication Critical patent/EP0971120A2/fr
Publication of EP0971120A3 publication Critical patent/EP0971120A3/fr
Application granted granted Critical
Publication of EP0971120B1 publication Critical patent/EP0971120B1/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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet

Definitions

  • the invention relates to a connecting element for a high pressure line according to the Preamble of claim 1.
  • connection element for a high-pressure line to provide an installation space in which a functional element Can be accommodated, which has a larger dimension than the cross section of the High pressure line.
  • the invention uses a connecting element for a high pressure line, the High pressure line has an inner diameter d and a crowned or as an outer cone trained sealing surface and the connecting element cooperating therewith has formed as an inner cone sealing surface and a larger Cross section than the high pressure line has and means are provided to High pressure line and connection element for sealing against each other in the axial direction to put under tension as known ahead.
  • the object of the invention is to develop such a connection element so that a reliable seal between the high pressure line and the connection element is guaranteed.
  • connection element of the type required provided that the sealing surface formed as an inner cone of the connecting element an area formed as a double cone in the body of the connecting element insert part is provided, the double cone of the insert part as Has outer cone formed sealing surface, which with a on the body of the Connection element provided, designed as an inner cone sealing surface cooperates, and wherein the double cone is the expansion of the cross section of the High-pressure line bridged to the cross section of the interior of the connecting element.
  • connection element in the larger cross section of the connection element for installation Housing a functional element is formed.
  • the installation space is preferably designed as a bore and has a diameter D, which is at least twice the inside diameter d of the high pressure line.
  • the double cone preferably has the same cone angle on the inside and outside.
  • the wall thickness t of the double cone is advantageously between 15 and 60%, preferably between 25 to 40% of a sealing ball radius R, which by the Distance of the line axis from the contact area between the sealing surface of the High pressure line and the cooperating sealing surface of the connection element is defined.
  • the wall thickness t of the double cone is advantageously between 0.5 and 5 mm, preferably between 1 and 2.5 mm.
  • the sealing sphere radius R is advantageously between 2 and 10 mm, preferably between 3 and 7 mm.
  • the double cone can be made of a material with slight flexibility, in particular from a material with slight elasticity or from a material with minor ductility.
  • connection element in which in the Connection element an installation space for accommodating a functional element is formed , means are advantageously provided to close the functional component in the installation space hold.
  • the means for holding the Functional elements an abutment shoulder provided on the body of the connecting element and comprise a system shoulder provided on the insert, between which the Functional element is kept under pressure.
  • the on the body of the Connection element provided contact shoulder continuing the line course Flow cross section surrounds and forms a sealing surface to the functional element, wherein the functional element from the installation space to the flow cross section or vice versa is flowed through.
  • connection element in which in the Connection element an installation space for accommodating a functional element is formed is, it can advantageously be provided that the outer contour of the Functional elements and the inner contour of the installation space are matched to one another, that a flow-free space remains around the functional element.
  • a Flow connection between the inside of the double cone and the inside of the Body of the connecting element through one or more holes in the insert will be produced.
  • Insert part has one or more lugs, which are used to center the insert part abut part of the inner surface of the body of the connector.
  • connection element proves to be particularly advantageous as part of a Fuel injection system of an internal combustion engine.
  • the connecting element as part of the housing Training fuel injector, being the supply of high pressure standing fuel to the fuel injector.
  • the invention is particularly advantageous for applications in which Functional element is a filter element, in particular a fuel filter.
  • connection element shows an enlarged cross-sectional view of a connection element according to a preferred embodiment of the invention.
  • reference numeral 1 generally designates a connection element which the Connection of a high pressure line 16 to any device, which one Gaseous or liquid fluid is to be supplied or removed from it, or it serves the connection of high pressure lines to each other.
  • connection element 1 part of the housing of a fuel injector in a fuel injection system for an internal combustion engine.
  • a high-pressure line 16 can also have a sealing surface 17 designed as an outer cone have a spherical sealing surface.
  • the connecting element 1 has a sealing surface 5 designed as an inner cone, which cooperates with the sealing surface 17 of the high pressure line 16.
  • a sealing surface 5 designed as an inner cone, which cooperates with the sealing surface 17 of the high pressure line 16.
  • These can consist of a union nut or other suitable means, as they are well known.
  • the sealing surface 5 of the connecting element 1, which is designed as an inner cone, is on one Double cone 4 formed, which is part of an insert 3, which is in the body 2 of the connecting element 1 can be used.
  • the double cone 4 has on its outside a formed as an outer cone sealing surface 6, which with a body 2 of the Connection element 1 provided sealing surface 7 cooperates as an inner cone is trained.
  • the tightness between the outer cone sealing surface 6 of the insert part 3 and the inner cone sealing surface 7 of the body 2 of the connection element 1 is also produced by the means which the high pressure line 16 and the connecting element 1st pressurize each other in the axial direction.
  • the body 2 of the connection element 1 has a larger cross section in its interior than the cross section of the high pressure line 16, which is determined by the inner diameter d the same is predetermined.
  • the expansion from the cross section of the high pressure line 16 to the cross section of the interior of the connection element 1 is through the double cone 4th bridged.
  • connection element 1 the interior of the connection element 1 is as Installation space 8, which serves to accommodate a functional element 9, at which is a filter element in the illustrated embodiment Filtering of fuel supplied via the high-pressure line 16 as it flows from the high pressure line 16 through the connecting element 1 in a the course of High-pressure line 16 continuing flow cross section 11 is.
  • the installation space 8 of the connecting element 1 is designed as a bore and has one Diameter D, which is larger than the inner diameter d of the high pressure line 16, preferably at least twice as large as this.
  • the double cone 4 has the same cone angle inside and outside.
  • the wall thickness t of the double cone 4 is 1.7 mm in the illustrated embodiment.
  • the wall thickness t of the double cone 4 should be between 15 and 60%, preferably between 25 to 40% of a sealing ball radius R, which by the distance of the line axis from the contact area between the sealing surface 17 of the High pressure line 16 and the cooperating sealing surface 5 of the Connection element 1 is defined.
  • This contact area is ideally in the area the center of the sealing surface 5 of the double cone 4, as in the figure by the R designated arrow is shown.
  • the wall thickness t of the double cone 4 is in absolute numbers between 0.5 and 5 mm, preferably between 1 and 2.5 mm.
  • the Sealing ball radius R is in absolute numbers between 2 and 10 mm, preferably between 3 and 7 mm.
  • the numbers mentioned are not to be understood as restrictive, however, prove to be advantageous areas with regard to the production of tightness both between the sealing surface 17 of the high pressure line 16 and that cooperating sealing surface 5 on the double cone 4 and between the Outer cone sealing surface 6 of the double cone 4 and the inner cone sealing surface 7 on the body 2 of the connecting element 1, which is equally reliable to manufacture.
  • the material from which the double cone 4 is made is one in the field of Sealing technology usual material, usually a metallic material, it can however, plastic can also be used.
  • the material may be minor Have flexibility due to elasticity or ductility.
  • the functional component 9 is between one on the body 2 of the connecting element 1 provided shoulder 14 on the one hand and one provided on the insert part 3 System shoulder 13 on the other hand held under pressure.
  • the body 2 of the connector 1 provided shoulder 14 surrounds the continuation of the line Flow cross section 11 and forms a sealing surface to the functional element 9, which through the installation space 8 to this flow cross section 11.
  • the outer contour of the functional element 9 and the inner contour of the installation space 8 are so coordinated with each other that around the functional element 9 a flowable space 10 remains.
  • Functional element 9 provided filter this means that the filter of the Installation space 8 through the free space 10 through the filter material to the Flow cross section 11 is flowed through.
  • the insert 3 has a plurality of holes 12. In the illustrated Embodiment, these are four such bores 12, the axes of which are radial to Line axis run and are each offset by 90 ° to each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Wire Bonding (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
EP99113229A 1998-07-10 1999-07-08 Elément de raccordement pour une conduite à haute pression Expired - Lifetime EP0971120B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19831080 1998-07-10
DE19831080A DE19831080A1 (de) 1998-07-10 1998-07-10 Anschlußelement für eine Hochdruckleitung

Publications (3)

Publication Number Publication Date
EP0971120A2 true EP0971120A2 (fr) 2000-01-12
EP0971120A3 EP0971120A3 (fr) 2001-08-01
EP0971120B1 EP0971120B1 (fr) 2003-03-12

Family

ID=7873709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99113229A Expired - Lifetime EP0971120B1 (fr) 1998-07-10 1999-07-08 Elément de raccordement pour une conduite à haute pression

Country Status (3)

Country Link
EP (1) EP0971120B1 (fr)
AT (1) ATE234427T1 (fr)
DE (2) DE19831080A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2390117A (en) * 2002-05-23 2003-12-31 Detroit Diesel Corp High-pressure connector for a fuel injection system having an integrated flow limiter and filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111370A (en) * 1977-04-08 1978-09-05 Caterpillar Tractor Co. Fuel inlet fitting for a fuel injection nozzle
US5169182A (en) * 1990-05-22 1992-12-08 Usui Kokusai Sangyo Kaisha Ltd. Branch connection in a high pressure fuel rail with gasket
US5402829A (en) * 1992-07-20 1995-04-04 Usui Kokusai Sangyo Kaisha Ltd. Structure for high-pressure fuel injection tube and method of manufacturing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111370A (en) * 1977-04-08 1978-09-05 Caterpillar Tractor Co. Fuel inlet fitting for a fuel injection nozzle
US5169182A (en) * 1990-05-22 1992-12-08 Usui Kokusai Sangyo Kaisha Ltd. Branch connection in a high pressure fuel rail with gasket
US5402829A (en) * 1992-07-20 1995-04-04 Usui Kokusai Sangyo Kaisha Ltd. Structure for high-pressure fuel injection tube and method of manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2390117A (en) * 2002-05-23 2003-12-31 Detroit Diesel Corp High-pressure connector for a fuel injection system having an integrated flow limiter and filter
GB2390117B (en) * 2002-05-23 2004-06-02 Detroit Diesel Corp High-pressure connector having an integrated flow limiter and filter

Also Published As

Publication number Publication date
EP0971120A3 (fr) 2001-08-01
DE59904514D1 (de) 2003-04-17
DE19831080A1 (de) 2000-01-13
ATE234427T1 (de) 2003-03-15
EP0971120B1 (fr) 2003-03-12

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