EP2253830B1 - Groupe d'aimants à baïonnette - Google Patents

Groupe d'aimants à baïonnette Download PDF

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Publication number
EP2253830B1
EP2253830B1 EP10157961A EP10157961A EP2253830B1 EP 2253830 B1 EP2253830 B1 EP 2253830B1 EP 10157961 A EP10157961 A EP 10157961A EP 10157961 A EP10157961 A EP 10157961A EP 2253830 B1 EP2253830 B1 EP 2253830B1
Authority
EP
European Patent Office
Prior art keywords
magnet
assembly according
magnet holder
holder
electrical contacts
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.)
Not-in-force
Application number
EP10157961A
Other languages
German (de)
English (en)
Other versions
EP2253830A1 (fr
Inventor
Friedrich Howey
Thomas Pauer
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 EP2253830A1 publication Critical patent/EP2253830A1/fr
Application granted granted Critical
Publication of EP2253830B1 publication Critical patent/EP2253830B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips

Definitions

  • a solenoid valve used on a fuel injection valve is known.
  • the magnet armature of the solenoid valve is designed in several parts and has an armature disk and an anchor bolt, which is guided in a slider.
  • a damping device is provided on the armature. With such a damping device exactly the required short switching times of the solenoid valve can be maintained.
  • the solenoid valve according to the DE 116 50 865 A 1 is used in particular for use in injection systems with high-pressure accumulator (common rail). According to this solution, the magnet sleeve surrounding the solenoid of the solenoid valve is fixed to the injector body of the fuel injector with a magnetic lock nut.
  • DE 199 56 206 A 1 refers to the Leerhubeingnagnath an actuator in a transmission element of a valve in a fuel injector.
  • an actuator is positioned, in which a plastically deformable spacer element is inserted into the housing of the fuel injector.
  • the spacer is permanently compressed according to the desired idle stroke of the valve and attached to the spacer element, the actuator housing attached to the housing of the fuel injector.
  • a problem point is given by a weld between the holding plate and magnetic sleeve on which the weld is barely controllable, since a hardened, quite bulky holding plate made of kohtenstoffheimem material is very difficult and welds without secure process control. Therefore, this weld is a weak point in terms of tightness against leakage of fuel and a weak point in terms of mechanical strength, resulting from the pressure oscillations within the magnet assembly, is. In addition, a cohesively joined of several structural components magnetic group is relatively expensive.
  • the object is to realize a magnet group, in particular for actuating a fuel injector, with a magnet holder, which is integrally formed, has no splice and additionally should have a reduced circumference with respect to the electrical contact to improve the installation situation in the engine compartment of a motor vehicle.
  • a one-piece magnet holder with bayonet geometry is proposed.
  • the magnetic core is first inserted axially into the magnet holder, against the action of a spring force of a spring element. Thereafter, the magnetic core is rotated and employed by the spring force against protrusions formed on the inner periphery of the magnet holder. Subsequently, the magnetic coil is mounted in the magnetic core which is already preassembled in the magnet holder.
  • the inventively proposed integrally formed magnet holder comprises a contrary to solutions according to the prior art extending in the radial direction return bore, which is connected via an eccentrically formed in the magnet holder connecting bore with the cavity of the magnet group in combination, in which the magnetic core is incorporated together with integrated magnetic coil ,
  • a plate spring which hires the magnetic core of the magnet group to projections on the inner circumference of the magnet holder.
  • the magnet holder is made of non-hardened material.
  • In this cavity usually leakage and control amount is diverted and discharged through the eccentrically arranged connecting bore and the radial in the present solution bore in the low-pressure side return of a fuel injection system in the direction of the tank.
  • Another advantage of the proposed solution according to the invention is that it requires a considerably smaller space, while the injector mounted with mounted magnetic assembly on the cylinder head of the internal combustion engine. If the electrical connectors, as in the solutions of the prior art, are encased in a plastic encapsulation which is already part of the magnet group, considerable difficulties in handling during assembly occur.
  • the magnetic coils of the magnet group contacting preferably designed as contact pins electrical contacts are guided by bushings in a contact guide. Subsequently, the contact pins are bent by about 90 ° and clamped in the contact guide. There, the bent contact pins are electrically contacted within recesses by mating plug to be provided by the customer, which can preferably be done by way of insulation displacement contacting. This claims significantly less space and can be contacted very safe and relatively motion-free by a customer-facing customer plug.
  • the mounted on the upper plan side of the magnet holder contact guide comprises complementary to the funnel geometry of the Ein Industriesfasen, executed extensions which protrude into the magnet holder and fix the sealing rings.
  • the contact guide grooves have larger recesses. After performing the electrical contacts through the contact guide and their insertion in the magnet holder, the protruding ends of the electrical contacts can be easily bent into the grooves. A customer-side electrical contacting takes place within recesses, which can be formed in a sufficient depth, so that the customer's mating connector for contacting the bent, preferably angled 90 ° electrical contacts, is secured and no relative movements occur, which affect the electrical contact.
  • a movement-free contacting of the bent ends of the electrical contacts can be realized by the mating connector.
  • a circumferential groove or the like can be formed on the circumference of the magnet holder, in which the mating connector to be provided by the customer for contacting the electrical contacts of the magnetic coil can be latched.
  • FIG. 1 is a magnetic group, made according to the prior art for actuating a fuel injector, refer to.
  • a magnetic core 12 is embedded in a magnetic holder 10 designed as a magnetic sleeve.
  • the magnetic core 12 in turn encloses a magnetic coil 14.
  • the magnetic core 12 is biased within the magnet holder 10 via a plate spring 18 and is supported with its underside on projections on the inner circumference of the magnet holder 10 from.
  • the in FIG. 1 The prior art partially injected fuel injector includes an anchor bolt 28 and an armature 30 movable relative thereto.
  • the armature 30 is acted upon by a valve spring 32 which is supported on a disk.
  • the anchor bolt 28 opens or closes a valve seat 36 formed on the top of a valve piece 34 of the fuel injector.
  • valve seat 36 When opening the valve seat 36, a control chamber 38 is depressurized, so that a push rod or a needle-shaped injection valve member on in FIG. 1 not shown combustion chamber end opens and fuel is injected into the combustion chamber of the internal combustion engine.
  • the system pressure in the control chamber 38 of the fuel injector builds up again and the push rod or the needle-shaped valve member moves back into a seat, so that the brennraum workedem end of the Fuel injector formed injection openings are closed again.
  • a magnetic group 8 comprises a magnetic holder 10 made of uncured material.
  • the magnetic core 12 having a magnetic coil 14 accommodated therein is fixed by a bayonet catch.
  • the bayonet lock is formed by circumferentially formed on the inner circumference of the magnet holder 10 projections, against the taking place in the axial direction insertion movement and an adjoining rotation, the underside of the magnetic core 12 by the plate spring 18.
  • the plate spring 18 in turn is based on a Supporting disk 20 from which has a circumferential recess 56, in which the plate spring 18 engages. From the illustration according to FIG.
  • a circumferential groove 50 extends, on which customer-side mating connector, via which the production of the electrical contact takes place, are fixed.
  • clamping nut 54 is the preassembled magnet holder 10 on the injector of the in FIG. 1 attached only partially shown fuel injector.
  • the upper plan side of the magnet holder 10 is designated by reference numeral 44.
  • FIG. 3 is a side view of the inventively proposed magnetic group 8 can be seen.
  • FIG. 3 shows that a bore 52 extends in the radial direction through the magnet holder 10.
  • the extending in the radial direction through the magnet holder 10 bore 52 communicates with a eccentric in the material of the magnet holder 10 extending connecting bore 60 with the cavity in combination in which the magnetic core 12 including embedded therein magnetic coil 14 is received.
  • Due to the radial course of the bore 52 is at the top, ie in the region of the plan side 44 of the magnet holder 10, much more space to form the electrical contact available.
  • This can on the other hand be designed to save space, so that through the use of a insulation displacement for contacting the magnetic coil 14 a total of a small outer diameter of the inventively proposed magnetic group 8 can represent.
  • FIG 3 also shows that on the ceiling of the cavity within the magnet holder 10, in the region in which the magnetic core 12 is received together with magnetic coil 14 embedded therein, the plate spring 18 is supported on the support disk 20.
  • the support plate 20, in which the plate spring 18, which acts on the magnetic core 12, supported, is preferably made of hardened material.
  • the use of hardened material is therefore particularly necessary in order to withstand the high axial forces generated by the anchor bolt 28 in the case of pressure balanced solenoid valves without deformation.
  • the magnet holder 10 itself can be made of non-hardened material, which further reduces the manufacturing costs.
  • the support disk 20, on which the plate spring 18 is supported, is manufactured as a rotationally symmetrical component, so that the shoulder 56 can be easily manufactured for positioning the disk spring 18. The need to incorporate geometry on the support disk 20 to pass the return is eliminated due to the eccentric location of the connection bore 60 which extends from the cavity in which the magnetic core 12 is received into the radial bore 52 and removes leakage and control.

Landscapes

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

Claims (9)

  1. Groupe magnétique (8), en particulier pour l'actionnement d'un injecteur de carburant, comprenant une bobine magnétique (14) et un noyau magnétique (12), qui sont reçus dans un support magnétique (10), un alésage (50) pour le raccordement d'un retour du côté basse pression s'étendant dans la direction radiale dans le support magnétique (10) réalisé d'une seule pièce, et des contacts électriques (22) de la bobine magnétique (14) étant guidés dans un guide de contact (24), caractérisé en ce que les contacts électriques (22) sont scellés par des bagues d'étanchéité (26), et en ce que des biseaux d'insertions (58) pour le guide de contact (24) sont réalisés dans le support magnétique (10) du côté du montage, lesquels sont accessibles avant le montage du noyau magnétique (12) et de la bobine magnétique (14) depuis le côté supérieur, et par le biais desquels les bagues d'étanchéité (26) peuvent être montées dans le support magnétique (10) depuis le côté supérieur.
  2. Groupe magnétique selon la revendication 1, caractérisé en ce que le guide de contact (24) présente des passages (40) pour des contacts électriques et leur géométrie est réalisée de manière complémentaire à la géométrie des biseaux d'insertion (58) du support magnétique (10).
  3. Groupe magnétique selon la revendication 1, caractérisé en ce que le guide de contact (24) présente des rainures (46) dans lesquelles des contacts électriques (22) sont recourbés, et sont mis en contact dans la région d'évidements (48) par un connecteur opposé.
  4. Groupe magnétique selon la revendication 1, caractérisé en ce que l'alésage (52) dans le support magnétique (10) débouche dans une cavité dans laquelle est disposé le noyau magnétique (12) avec le groupe magnétique (14).
  5. Groupe magnétique selon la revendication 1, caractérisé en ce que le noyau magnétique (12) est précontraint par un ressort Belleville (18) qui s'appuie sur une rondelle de support (20).
  6. Groupe magnétique selon la revendication 5, caractérisé en ce que la rondelle de support (20) est fabriquée en matériau durci et présente un épaulement périphérique (56) contre lequel s'appuie le ressort Belleville (18).
  7. Groupe magnétique selon la revendication 1, caractérisé en ce que l'alésage (52) et la cavité dans laquelle est disposé le noyau magnétique (12), sont connectés l'un à l'autre de manière hydraulique par le biais d'un alésage de liaison (60) s'étendant de manière excentrée.
  8. Groupe magnétique selon la revendication 1, caractérisé en ce que le support magnétique (10) est fabriqué en matériau non durci.
  9. Groupe magnétique selon la revendication 1, caractérisé en ce que le support magnétique (10) comprend une rainure périphérique (50) contre laquelle des connecteurs opposés pour le contact des contacts électriques (22) peuvent être verrouillés.
EP10157961A 2009-05-19 2010-03-26 Groupe d'aimants à baïonnette Not-in-force EP2253830B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009003233A DE102009003233A1 (de) 2009-05-19 2009-05-19 Bajonettmagnetgruppe

Publications (2)

Publication Number Publication Date
EP2253830A1 EP2253830A1 (fr) 2010-11-24
EP2253830B1 true EP2253830B1 (fr) 2012-02-29

Family

ID=42272187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10157961A Not-in-force EP2253830B1 (fr) 2009-05-19 2010-03-26 Groupe d'aimants à baïonnette

Country Status (3)

Country Link
EP (1) EP2253830B1 (fr)
AT (1) ATE547618T1 (fr)
DE (1) DE102009003233A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223167A1 (de) * 2015-11-24 2017-05-24 Robert Bosch Gmbh Schaltventil für einen Kraftstoffinjektor sowie Kraftstoffinjektor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1650865A1 (de) 1967-03-30 1970-11-12 Edward Turner Engineering Deve Kettengetriebe
DE3111938A1 (de) * 1981-03-26 1982-10-07 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnet
DE19605277B4 (de) * 1995-02-15 2004-06-03 Nippon Soken, Inc., Nishio Magnetbetätigtes hydraulisches Steuerventil zur Verwendung im Kraftstoffeinspritzsystem eines Verbrennungsmotors
JP3687758B2 (ja) * 1995-11-14 2005-08-24 株式会社デンソー 燃料噴射装置
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE19956206A1 (de) 1999-09-23 2001-03-29 Andreas Mucha Dekoratives Schutzschichtsystem
EP1628370B1 (fr) * 2004-08-20 2012-11-07 Continental Automotive GmbH Dispositif de connection électrique
DE102006054063A1 (de) * 2006-11-16 2008-05-21 Robert Bosch Gmbh Kraftstoffinjektor
FR2909137B1 (fr) * 2006-11-24 2009-02-27 Electricfil Automotive Soc Par Dispositif d'assemblage pour un actionneur electromagnetique d'un injecteur pour moteur a combustion interne.
DE102007026488A1 (de) 2007-06-05 2008-12-11 Robert Bosch Gmbh Magnetventilkopf eines Magnetventils
DE102007038139A1 (de) * 2007-08-13 2009-02-19 Robert Bosch Gmbh Elektrischer Stecker mit Kraftstoffrücklauf

Also Published As

Publication number Publication date
ATE547618T1 (de) 2012-03-15
DE102009003233A1 (de) 2010-11-25
EP2253830A1 (fr) 2010-11-24

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