EP1407135B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1407135B1
EP1407135B1 EP02742713A EP02742713A EP1407135B1 EP 1407135 B1 EP1407135 B1 EP 1407135B1 EP 02742713 A EP02742713 A EP 02742713A EP 02742713 A EP02742713 A EP 02742713A EP 1407135 B1 EP1407135 B1 EP 1407135B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
screw thread
nozzle body
labyrinth seal
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
EP02742713A
Other languages
German (de)
English (en)
Other versions
EP1407135A1 (fr
Inventor
Hubert Stier
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1407135A1 publication Critical patent/EP1407135A1/fr
Application granted granted Critical
Publication of EP1407135B1 publication Critical patent/EP1407135B1/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
    • F02M61/04—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
    • 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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means

Definitions

  • the invention relates to a fuel injection valve according to the preamble of independent claim 1.
  • DE 198 49 210 A1 discloses a fuel injection valve which has a nozzle body which is tubular on its downstream side and at the downstream end of which a sealing seat and an injection orifice are arranged.
  • the tubular part of the nozzle body is insertable into a receiving bore of a cylinder head.
  • the nozzle body is sealed with a seal which has approximately the geometry of a hollow cylinder.
  • the nozzle body has a circumferential groove, which is introduced for example by twisting off the nozzle body and in which the seal is used.
  • materials elastic materials can be used, which can be pushed over the nozzle body for mounting in the groove.
  • a fuel injection valve in which a sealing element is arranged on the nozzle body.
  • the gasket is made of a metallic material and expands in the radial direction under the influence of the temperature produced by the combustion process. This can be done either by a shape memory alloy or by the use of a bimetallic seal.
  • a groove can be used in the nozzle body.
  • the metal sealing ring heats up and expands. This increases the sealing effect during operation.
  • the metal gasket has a slightly smaller diameter than the fuel injection valve receiving bore which is inserted in the cylinder head.
  • a disadvantage of the sealing solution specified in DE 198 49 210 A1 is primarily the high temperature acting on the seal. Particularly in the case of direct-injection internal combustion engines, solid-gas strength of non-metallic sealing materials can not be ensured.
  • a shape memory alloy has a transition temperature tailored to the application. In order to be able to reliably ensure this transition temperature, a narrow margin in terms of the manufacturing process is usually required. As a result, not only the development costs for the alloy but also the costs for use in a series production are increased.
  • bimetallic seal requires a fixation of the seal on the nozzle body, which serves as an abutment during deformation.
  • mounting the bimetal in a groove, for example, is difficult because the properties of the material change when one of the two metals undergoes non-elastic deformation during assembly.
  • the fuel injection valve according to the invention with the characterizing feature of claim 1 has the advantage that the nozzle body and a magnet pot, in which the magnetic circuit of the fuel injection valve is sealed, are sealed by means of a thread-shaped labyrinth seal against an environment of the fuel injection valve.
  • the labyrinth seal on two to three turns, which have a radial amplitude of about 0.5 mm in order to achieve a reliable sealing effect.
  • a further advantage is that the labyrinth seal by means of simple manufacturing process with the aid of a Thread cutting tool or an internal mandrel can be done without chipping.
  • the shape of the thread is not limited to round cross-sections, but arbitrarily elliptical or oval can be produced.
  • a fuel injection valve 1 shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 comprises a sleeve-shaped nozzle body 2, in which, for example, a valve needle not shown can be arranged.
  • the fuel injection valve 1 is an electromagnetically actuated fuel injection valve 1.
  • the nozzle body 2 passes through a magnetic coil 3, which is wound on a bobbin 4.
  • the magnet coil 3 is encapsulated in a magnet pot 6, which is sealed by a inventively designed labyrinth seal 5 against an environment of the fuel injection valve 1.
  • FIG. 2 A detailed representation of the labyrinth seal 5 of the fuel injection valve 1 according to the invention is shown in FIG. 2 and the following description.
  • the magnetic coil 3 is energized via a line, not shown, from an electrical current which can be supplied via an electrical plug contact 7.
  • the plug contact is surrounded by a plastic casing 8, which may be molded on the nozzle body 2.
  • FIG. 2 shows, in an excerpted sectional view, the region of the exemplary embodiment of a fuel injection valve 1 designed in accordance with FIG. 1 and designated II in FIG. 1.
  • the magnetic coil 3 and the nozzle body 2 of the inventively designed fuel injector 1 are, as already mentioned, equipped with a labyrinth seal 5, which seals the surrounded by the plastic casing 8 components against the environment of the fuel injector 1 and this thus z. B. protects dirt and saltwater.
  • the labyrinth seal 5 is thread-shaped and comprises at least two, better three thread grooves 9.
  • a radial distance between a low point 10 of each thread groove 9 and a high point 11 of each thread groove should be at least 0.5 mm.
  • the shape of the thread is arbitrary. The easiest way to produce a round thread, but there are also elliptical cross-sections conceivable.
  • the labyrinth seal 5 is used to protect the region surrounded by the plastic casing 8 with the nozzle body 2 from aggressive media in the vicinity of the fuel injection valve 1.
  • a labyrinth seal 5 configured in a thread-like manner according to the fuel injection valve 1 according to the invention allows a rotary demolding of the tool producing the labyrinth seal 5, which eliminates reworking and simplifies the manufacturing process and thus becomes less costly.
  • the labyrinth seal 5 can be produced for example by deep-drawing or extrusion, wherein the thread grooves 9 are made by means of a thread cutting tool. Also by means of round hammers or rotary kneading a thread-shaped labyrinth seal 5 can be designed with the aid of a thread-shaped inner mandrel.
  • the invention is not limited to the illustrated embodiment of an inventively designed fuel injector 1 and suitable for any construction of fuel injection valves 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (6)

  1. Injecteur de carburant (1) pour des installations d'injection de carburant de moteurs à combustion interne, avec un corps d'injecteur (2) et une bobine magnétique (3) disposée dans une boîte magnétique (6) et traversée par le corps d'injecteur (2), et avec une gaine de matière plastique (8) qui entoure au moins partiellement le corps d'injecteur (2),
    caractérisé en ce que
    le corps d'injecteur (2) et la boîte magnétique (6) sont rendus étanches par rapport à un environnement de l'injecteur de carburant (1) au moyen d'un joint à labyrinthe en forme de filet (5) se trouvant entre la gaine en matière plastique et la boîte magnétique.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le joint à labyrinthe (5) présente au moins deux gorges de filet (9).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce qu'
    une distance radiale entre un point bas radialement intérieur (10) et un point haut radialement extérieur (11) des gorges de filet (9) vaut au moins 0,5 mm.
  4. Injecteur de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    le joint à labyrinthe (5) est réalisé par emboutissage, extrusion ou matriçage.
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    les gorges de filet (9) du joint à labyrinthe (5) sont réalisées au moyen d'un outil de taille de filets ou d'un mandrin intérieur en forme de filet.
  6. Injecteur de carburant selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    les gorges de filet (9) présentent une section transversale ronde, ovale ou elliptique.
EP02742713A 2001-07-09 2002-05-07 Soupape d'injection de carburant Expired - Lifetime EP1407135B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10133263A DE10133263A1 (de) 2001-07-09 2001-07-09 Brennstoffeinspritzventil
DE10133263 2001-07-09
PCT/DE2002/001634 WO2003006819A1 (fr) 2001-07-09 2002-05-07 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1407135A1 EP1407135A1 (fr) 2004-04-14
EP1407135B1 true EP1407135B1 (fr) 2006-07-12

Family

ID=7691145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02742713A Expired - Lifetime EP1407135B1 (fr) 2001-07-09 2002-05-07 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US7048253B2 (fr)
EP (1) EP1407135B1 (fr)
JP (1) JP2004521270A (fr)
KR (1) KR100853643B1 (fr)
DE (2) DE10133263A1 (fr)
WO (1) WO2003006819A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005025890D1 (de) * 2004-07-16 2011-02-24 Eagle Ind Co Ltd Ventil mit solenoidsteuerung
DE102005033138B4 (de) * 2005-07-15 2017-12-14 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005040199A1 (de) * 2005-08-25 2007-03-01 Robert Bosch Gmbh Piezoaktor mit Steckervorrichtung und ein Verfahren zu dessen Herstellung
JP4211814B2 (ja) * 2006-07-13 2009-01-21 株式会社日立製作所 電磁式燃料噴射弁
US8763362B1 (en) * 2008-10-03 2014-07-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Injector element which maintains a constant mean spray angle and optimum pressure drop during throttling by varying the geometry of tangential inlets

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2210213C2 (de) * 1972-03-03 1985-03-28 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betätigbares Kraftstoffeinspritzventil für Brennkraftmaschinen
DE2233919C3 (de) 1972-07-10 1979-02-22 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung für eine Einspritzdüse zur Kraftstoffeinspritzung in den Saugkanal einer Brennkraftmaschine
GB1415095A (en) * 1973-01-23 1975-11-26 Decca Ltd Sealing assemblies
JPS57190118U (fr) * 1981-05-27 1982-12-02
DE3904718A1 (de) 1989-02-16 1990-08-30 Renk Ag Schwimmende drallschneidendichtung
JPH0429607A (ja) * 1990-05-23 1992-01-31 Nippon Steel Corp 耐遅れ破壊特性の優れた高張力ボルト
JP2553566Y2 (ja) * 1991-01-31 1997-11-05 岡部株式会社 全ねじロックボルト用継手
JPH0578184U (ja) * 1992-03-26 1993-10-22 株式会社三協精機製作所 回転駆動装置
FR2692633B1 (fr) * 1992-06-17 1995-08-25 Aerospatiale Visserie en materiau composite constitue d'une matrice ceramique renforcee de fibres refractaires.
JPH0650235A (ja) * 1992-07-30 1994-02-22 Hitachi Ltd 電磁式燃料噴射弁
DE4332368A1 (de) * 1993-09-23 1995-03-30 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil, insbesondere für schlupfgeregelte hydraulische Bremsanlagen in Kraftfahrzeugen
DE4342415C2 (de) * 1993-12-13 1998-04-16 Haerle Anton Spannungsoptimiertes Gewindeprofil
DE4421429A1 (de) * 1994-06-18 1995-12-21 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE4427905A1 (de) * 1994-08-06 1996-02-08 Teves Gmbh Alfred Ventilvorrichtung, insbesondere für hydraulische Bremsanlagen mit Blockier- und/oder Antriebsschlupfregelung
DE4438878A1 (de) * 1994-10-31 1996-05-02 Leybold Ag Dichtungssystem für eine vertikal angeordnete Welle
JP3122345B2 (ja) * 1995-09-06 2001-01-09 日機装株式会社 歯車式減速機
JP3023469U (ja) * 1995-10-04 1996-04-16 ナミテイ株式会社 ナット及びそれを用いた締結装置
JPH10159675A (ja) 1996-11-28 1998-06-16 Toyota Motor Corp シールリング
JPH1150994A (ja) * 1997-07-31 1999-02-23 Tochigi Fuji Ind Co Ltd 遠心式流体機械
DE19739150A1 (de) 1997-09-06 1999-03-11 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19808068A1 (de) 1998-02-26 1999-09-02 Bosch Gmbh Robert Brennstoffeinspritzventil
US6299079B1 (en) * 1998-06-18 2001-10-09 Robert Bosch Gmbh Fuel injector
DE19849210A1 (de) 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE50207511D1 (de) 2006-08-24
KR100853643B1 (ko) 2008-08-25
KR20030036755A (ko) 2003-05-09
US20040026646A1 (en) 2004-02-12
WO2003006819A1 (fr) 2003-01-23
JP2004521270A (ja) 2004-07-15
DE10133263A1 (de) 2003-02-06
US7048253B2 (en) 2006-05-23
EP1407135A1 (fr) 2004-04-14

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