EP1490594B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1490594B1
EP1490594B1 EP03714674A EP03714674A EP1490594B1 EP 1490594 B1 EP1490594 B1 EP 1490594B1 EP 03714674 A EP03714674 A EP 03714674A EP 03714674 A EP03714674 A EP 03714674A EP 1490594 B1 EP1490594 B1 EP 1490594B1
Authority
EP
European Patent Office
Prior art keywords
spring element
apertures
fuel injection
injection valve
longitudinal axis
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
EP03714674A
Other languages
German (de)
English (en)
Other versions
EP1490594A1 (fr
Inventor
Dietmar Uhlmann
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 EP1490594A1 publication Critical patent/EP1490594A1/fr
Application granted granted Critical
Publication of EP1490594B1 publication Critical patent/EP1490594B1/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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift

Definitions

  • the known helical compression spring has the disadvantage that, in order to produce the necessary rigidity, it has to be wound with a relatively strong wire and thus occupies a relatively large amount of installation space. This sets the further streamlining of the fuel injection valves a limit that can not be exceeded due to the prevailing high fuel pressure there.
  • a fuel injection valve which has a closing element in the form of a ball, which cooperates with a valve seat.
  • the ball is pressed by a spring sleeve against the valve seat, wherein the sleeve has openings at several points, which provides the desired longitudinal elasticity.
  • the fuel injection valve according to the invention with the characterizing features of claim 1 has the advantage that the spring element used in the form of a cylindrical sleeve with the same rigidity less space required than a corresponding helical compression spring, so that the outer diameter of the fuel injection valve can be reduced accordingly.
  • the cylindrical sleeve of the spring element has on its wall at several points openings, which make the cylindrical sleeve elastically deformable in the longitudinal direction, wherein the apertures are formed slit-shaped. In order to keep the notch stresses at the ends of the slot-shaped openings small, the ends are rounded, and the openings are formed with respect to their longitudinal axis in the center waisted.
  • the cylindrical sleeve thus obtains the desired longitudinal elasticity without the notch stresses becoming too high at the ends of the apertures and resulting in a plastic deformation of the material of the cylindrical sleeve.
  • FIG. 1 is a longitudinal section through an inventive fuel injection valve shown.
  • the fuel injection valve has a housing 1, which comprises a valve holding body 3 and a valve body 5, which are clamped by means of a clamping nut 7 in the axial direction against each other.
  • a bore 10 is formed, the a longitudinal axis 14 and in which a piston-shaped valve member 12 is arranged longitudinally displaceable.
  • the hole 10 expands at its end facing away from the combustion chamber to an interior space 9, into which an inlet channel 21 formed in the valve holding body 3 opens.
  • valve member 12 is guided in a bore bore portion 110 in the bore 10 and between the valve member 12 and the wall of the bore 10, a ring-channel-shaped pressure chamber 18 is formed, which is filled via the inlet channel 21 and the interior 9 with fuel under high pressure.
  • a ring-channel-shaped pressure chamber 18 is formed, which is filled via the inlet channel 21 and the interior 9 with fuel under high pressure.
  • four poles 16 are provided, which allow the fuel from the interior 9 between the valve member 12 and the wall of the bore 10 can flow into the pressure chamber 18.
  • valve seat 20 is formed, which is conically shaped and cooperates with a formed on the combustion chamber end of the valve member 12 valve sealing surface 24 in such a way that lifted from the valve seat 20 valve sealing surface 24 fuel from the Pressure chamber 18 between the valve sealing surface 24 and the valve seat 20 can flow through to formed in the valve body 5 injection openings 22, through which the fuel is injected into the combustion chamber 6 of the internal combustion engine. If the valve sealing surface 24 bears against the valve seat 20, this fuel flow is interrupted so that the injection openings 22 are closed.
  • a sleeve 34, a spring element 30 and a spring plate 32 is arranged, which surround the combustion chamber facing away from the end portion of the valve member 12.
  • a control chamber 37 is limited, can be passed into the trained via a valve holding body 3 control bore 40 fuel at high pressure.
  • the spring element 30 is arranged between the sleeve 34 and the spring plate 32 under compressive bias, whereby the sleeve 34 and the spring plate 32 are pressed apart. As the spring plate 32 is supported on the valve member, thereby the valve member 12 is pressed against the valve seat 20.
  • the longitudinal movement of the valve member 12 is controlled by the hydraulic pressure in the pressure chamber 18 and the pressure in the control chamber 37.
  • a continuously high fuel pressure prevails in the pressure chamber 18, resulting in a hydraulic force acting on a pressure shoulder 17, which is formed at the transition of the combustion chamber-facing section of the valve member 12 to the guided section in the region of the polished sections 16.
  • this opening force is the force of the prestressed spring element 30 and the hydraulic closing force, which results from the pressure in the pressure chamber 37 on the end face 13 of the valve member 12.
  • the spring element 30 is designed as a cylindrical sleeve, which has a plurality of apertures 45 on its wall, whereby the spring element 30 is elastically deformable in the longitudinal direction.
  • the exact structure of the formed as a cylindrical sleeve spring element 30 is in FIG. 4 shown, wherein the spring element 30 is shown here in the unloaded state and is made in this case as a separate component without the sleeve 34 and the ring member 42.
  • the apertures 45 of the spring element 30 are slot-shaped and have a longitudinal axis 52 which extends with respect to the longitudinal axis 14 of the spring element 30 in a radial plane.
  • the ends 47 of the slot-shaped openings 45 are rounded in order to reduce the notch stresses at this point during compression of the spring element 30.
  • plastic deformation of the material is to be prevented in any case at the ends 47 of the openings 45. Otherwise, the spring element 30 would irreversibly deform, which would change the rigidity.
  • two slot-shaped apertures 45 are arranged, which are separated by a connecting web 48 and a second connecting web 48 'opposite thereto.
  • the adjacent radial plane lying apertures 45 are configured the same, but they are rotated with respect to the longitudinal axis 14 by 90 °.
  • the thickness of the cantilever 49 and over the length thereof, resulting from the width of the connecting webs 48 the elasticity and thus the spring constant of the spring element 30 can be adjusted.
  • the spring element 30 shown here consists of two half-cylinders, which are connected to welds 50 together.
  • the production of the spring element 30 takes place, for example, in that two half cylinders are produced separately, which are then connected to each other at weld seams 50.
  • FIG. 5 shows an intermediate step of one of the half-cylinders, namely a spring element half 130, which represents a rectangular, planar sheet of a suitable steel.
  • breakthroughs 45 are introduced, for example by punching.
  • the spring element half 130 is then bent, so that the side surfaces 54 can each be connected to a corresponding side surface 54 of a second spring element half 130, preferably by welding.
  • the welds 50 are dispensed with.
  • the apertures 45 can not be introduced by punching in this case, but for example by means of a laser. Which manufacturing method makes sense in each case depends on the expected mechanical load of the spring element 30.

Landscapes

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

Claims (5)

  1. Soupape d'injection de carburant pour moteurs à combustion interne, comprenant un boîtier (1) dans lequel est disposé mobile un organe de soupape (12) et qui commande, par son mouvement à l'encontre de la force élastique d'un élément de ressort (30) l'alimentation en carburant à la chambre de combustion (6) du moteur à combustion interne, l'élément de ressort (30) étant une douille cylindrique avec un axe longitudinal (14) et la paroi de la douille présentant, en plusieurs endroits, des ouvertures (45) séparées les unes des autres, de sorte que l'élément de ressort (30) puisse être déformé élastiquement dans la direction de l'axe longitudinal (14), caractérisée en ce que les extrémités (47) des ouvertures (45) sont arrondies et les ouvertures (45) présentent un axe longitudinal (52) par rapport auquel elles sont symétriques, et en ce que les ouvertures (45) présentent la forme d'une fente longitudinale, laquelle fente longitudinale est profilée en centre par rapport à son axe longitudinal (52).
  2. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que les ouvertures (45) dans la paroi de l'élément de ressort (30) s'étendent essentiellement dans un plan radial de l'axe longitudinal (14) de l'élément de ressort (30).
  3. Soupape d'injection de carburant selon la revendication 2, caractérisée en ce que deux ouvertures de même type (45) se situent dans un plan radial de l'élément de ressort (30), les ouvertures (45) étant séparées les unes des autres par des nervures de connexion (48).
  4. Soupape d'injection de carburant selon la revendication 3, caractérisée en ce que des ouvertures (45) sont disposées dans au moins deux plans radiaux, les ouvertures d'un plan radial étant tournées de 90° par rapport aux ouvertures du plan radial adjacent.
  5. Soupape d'injection de carburant selon la revendication 1, caractérisée en ce que l'élément de ressort (30) est disposé dans le boîtier (1) avec une précontrainte élastique.
EP03714674A 2002-03-26 2003-03-03 Soupape d'injection de carburant Expired - Lifetime EP1490594B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10213382 2002-03-26
DE10213382A DE10213382A1 (de) 2002-03-26 2002-03-26 Kraftstoffeinspritzventil
PCT/DE2003/000694 WO2003081023A1 (fr) 2002-03-26 2003-03-03 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1490594A1 EP1490594A1 (fr) 2004-12-29
EP1490594B1 true EP1490594B1 (fr) 2009-07-22

Family

ID=28050838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03714674A Expired - Lifetime EP1490594B1 (fr) 2002-03-26 2003-03-03 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US7175112B2 (fr)
EP (1) EP1490594B1 (fr)
JP (1) JP2005520981A (fr)
DE (2) DE10213382A1 (fr)
WO (1) WO2003081023A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10319600A1 (de) * 2003-05-02 2004-11-18 Robert Bosch Gmbh Aktoreinheit für ein piezogesteuertes Kraftstoffeinspritzventil
DE102004028209A1 (de) * 2004-06-09 2005-12-29 Robert Bosch Gmbh Kraftstoffeinspritzventil
DE102004031597A1 (de) 2004-06-30 2006-02-09 Robert Bosch Gmbh Kraftstoffeinspritzventil
US20070194508A1 (en) * 2006-02-21 2007-08-23 Bucciero Henry R Spring fabricated from a tube
DE102006009071A1 (de) * 2006-02-28 2007-08-30 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006035038A1 (de) * 2006-07-28 2008-01-31 Epcos Ag Federelement sowie Piezoaktor mit dem Federelement
ES2340962T3 (es) * 2007-11-28 2010-06-11 MAGNETI MARELLI S.p.A. Inyector de carburante con amortiguador mecanico.
US7950596B2 (en) * 2008-06-27 2011-05-31 Caterpillar Inc. Distributed stiffness biasing spring for actuator system and fuel injector using same
CN101592107B (zh) * 2009-04-24 2011-06-15 靳北彪 发动机用壳体形变燃油喷射器
CN101555852B (zh) * 2009-04-30 2011-07-20 靳北彪 发动机用直控式壳体形变流体喷射器
US9068510B2 (en) * 2011-11-22 2015-06-30 Delavan, Inc Machined springs for injector applications
WO2013142871A1 (fr) * 2012-03-23 2013-09-26 Ddps Global, Llc Ressort de compression et pompe permettant de distribuer un fluide
US20150060433A1 (en) * 2013-08-29 2015-03-05 Varian Semiconductor Equipment Associates, Inc. High temperature platen power contact
EP2857670B1 (fr) * 2013-10-04 2018-12-12 Continental Automotive GmbH Injecteur à carburant
EP3009660B1 (fr) * 2014-10-14 2017-05-03 Continental Automotive GmbH Ensemble de soupape pourvu d'un élément de guidage et injecteur de fluide
DE102014226407A1 (de) * 2014-12-18 2016-06-23 Robert Bosch Gmbh Einspritzdüse für Kraftstoffe
ITUA20164465A1 (it) * 2016-06-17 2017-12-17 Scuola Superiore Di Studi Univ E Di Perfezionamento Santanna Giunto per la trasmissione di una sollecitazione torsionale con risposta elastica
US10933525B2 (en) * 2018-07-04 2021-03-02 Fanuc Corporation Horizontal articulated robot
EP3888195A4 (fr) * 2018-11-30 2022-08-03 Corning Optical Communications RF LLC Contacts électriques compressibles à sections coupées par divaricelle
CN114151485A (zh) * 2020-09-07 2022-03-08 本田技研工业株式会社 树脂制弹簧
WO2024003861A1 (fr) * 2022-07-01 2024-01-04 3Dific Societa' A Responsabilita' Limitata Joint flexible

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US1557958A (en) * 1924-08-26 1925-10-20 American Mach & Foundry Flexible coupling
US2171185A (en) * 1935-12-18 1939-08-29 Maier Friedrich Eugen Longitudinal spring for telescopic tubular guides
FR1192901A (fr) * 1953-05-23 1959-10-29 Pompes Et Injecteurs Tilliet S Perfectionnements apportés aux appareils volumétriques à liquide, notamment aux pompes et aux injecteurs pour l'alimentation en combustible de moteurs thermiques
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Also Published As

Publication number Publication date
DE50311728D1 (de) 2009-09-03
JP2005520981A (ja) 2005-07-14
US20050224604A1 (en) 2005-10-13
EP1490594A1 (fr) 2004-12-29
DE10213382A1 (de) 2003-10-16
WO2003081023A1 (fr) 2003-10-02
US7175112B2 (en) 2007-02-13

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