EP2839143A1 - Magnet assembly, particularly for a solenoid valve of a fuel injector - Google Patents

Magnet assembly, particularly for a solenoid valve of a fuel injector

Info

Publication number
EP2839143A1
EP2839143A1 EP13706474.7A EP13706474A EP2839143A1 EP 2839143 A1 EP2839143 A1 EP 2839143A1 EP 13706474 A EP13706474 A EP 13706474A EP 2839143 A1 EP2839143 A1 EP 2839143A1
Authority
EP
European Patent Office
Prior art keywords
clamping ring
air gap
residual air
clamping
magnet assembly
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
EP13706474.7A
Other languages
German (de)
French (fr)
Other versions
EP2839143B1 (en
Inventor
Thomas Nierychlo
Marco Beier
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 EP2839143A1 publication Critical patent/EP2839143A1/en
Application granted granted Critical
Publication of EP2839143B1 publication Critical patent/EP2839143B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed armatures
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs

Definitions

  • Magnetic assembly in particular for a solenoid valve of a fuel injector prior art
  • the invention relates to a magnet assembly, in particular for a solenoid valve of a fuel injector according to the preamble of claim 1.
  • Common rail injectors use so-called servo valves, which control the pressure in a control room.
  • As an actuator for such servo valves u. a. Magnetic actuators used.
  • Such magnetic actuators have a magnet assembly with a magnetic core and a magnet armature, wherein a so-called residual air gap disk is used to set a minimum residual air gap between an armature surface and a pole face.
  • the residual air gap disk can be arranged above the inner pole or outer pole of the magnetic core.
  • the clamping ring presses the residual air gap disc on the Jardinpol nature.
  • An appropriate non-positive connection between the armature plate side end of the magnetic core and the residual air gap disc is achieved by a clamping ring receptacle is provided with a counter surface in which the clamping ring is received, wherein the clamping ring is supported with a radial clamping force on the counter surface and by means of a counter surface derived resulting resilience against the
  • the clamping ring receptacle with the mating surface is expediently formed on an overlap arranged on a magnet sleeve, which holds the
  • Ankerplatten solution canen end side of the magnetic core radially overlaps, so that the mating surface is at an axial distance radially below the residual air gap disc.
  • the clamping ring may have a round cross section or a cross section with at least one conical support surface.
  • the counter surface for supporting the clamping ring is a bevel, which generates the resulting clamping force in the direction of the residual air gap disc, or the counter surface for supporting the clamping ring is one at a gap
  • the support surface is formed on the outer circumference of the clamping ring, with the clamping ring is supported on a complementary conical surface as a counter surface.
  • Fig. 1 shows a cross section through a solenoid valve with an inventive
  • Fig. 2 is an enlarged detail X of Fig. 1 according to a first
  • Fig. 3 is an enlarged detail X of Fig. 1 according to a second
  • Fig. 4 is an enlarged detail X of Fig. 1 according to a third
  • Fig. 5 is a plan view of a clamping ring.
  • Valve element 10 and a magnet assembly 20 which are arranged in an injector body 11.
  • the valve element 10 comprises a closing element 12, which acts on a valve seat 13.
  • By means of the closing element 12 is a
  • Control chamber 15 connected to the control of a nozzle needle, not shown, connected to a low-pressure chamber 16 or closed.
  • the magnet assembly 20 includes a magnetic core 21 and a magnet armature 22.
  • the magnet core 21 has an armature plate side end face 23 which forms a pole face.
  • a magnetic coil 26 is inserted, so that the magnetic core 21, an inner pole 24 and an outer pole 25 is formed.
  • an inner pole face 24a is thus formed at the inner pole 24, and an outer pole face 25a is formed at the outer pole 25.
  • the magnetic core 21 is received in a magnet sleeve 28 which is clamped by means of a clamping sleeve 27 with the injector body 10.
  • the magnetic core 21 rests with its armature plate-like end face 23 on an annular surface 29 formed on the magnet sleeve 28.
  • the armature 22 has an anchor plate 31 with an outer diameter and an anchor sleeve 33, wherein the anchor sleeve 33 at the same time
  • Closing element 12 forms.
  • the outer diameter defines an armature surface 32 on the armature plate 31.
  • the armature sleeve 33 is guided on its outer circumferential surface in a valve piece 34 formed on the injector body 10.
  • Residual air gap disc 40 is arranged, which is designed as a circular ring and thus represents an outer residual air gap disc.
  • the residual air gap disk 40 has a clamping-ring-side end face 41 and a magnet core-side end face 42 and is held on the armature-plate-side end face 23 of the magnetic core 21 in the region of the outer pole face 25a by means of a clamping connection 50.
  • the clamp connection 50 has a clamping ring holder 51 with a
  • the clamping ring 60 has a radial clamping force with which the clamping ring 60 at the in the
  • Clamping ring 51 trained counter surface 52 is supported. Due to the position of the mating surface 52, which has inclined to the residual air gap disk 40, on the mating surface 52 from the radial clamping force of the clamping ring 60 a
  • the clamping ring 60 realizes with the resulting clamping force the required clamping force for the clamping connection 50, with which the residual gap plate 40 with the magnetic core side end 42 is held frictionally on the armature plate side end face 23 of the magnetic core 21. To apply the necessary bias when inserting the clamping ring 60 in the
  • Clamping ring 51 the clamping ring 60 according to Figure 5 has a slot 61.
  • an overlap 53 is formed on the magnet sleeve 28, axially below the annular surface 29, which overlaps the
  • the clamping ring 60 has a round cross-section.
  • the counter surface 52 is in the embodiment of Figure 2 is a slope on which the clamping ring 60 acts with its radial clamping force and a corresponding resulting clamping force in the direction of the residual air gap disc 60 dissipates, with the clamping ring 60 against the
  • the clamping ring receptacle 51 has a mating surface 52 with a curved course. Due to the curve shape, the clamping force of the clamping ring 60 can be adjusted over itself
  • Diameter of the clamping ring 60 can be varied. Again, the clamping ring 60 presses with the resulting clamping force against the clamping ring-side end face 41 of the residual air gap disc 40th
  • the counter surface for supporting the clamping ring 60 is formed on a gap clamping surface, wherein the clamping ring 60 wedged due to its radial clamping force in the gap between the clamping surface and the residual air gap disk 40 and the resulting clamping force against the residual air gap disk 40th suppressed.
  • the clamping ring 60 has a conical support surface 54 at least on the outer peripheral surface.
  • the counter-surface 52 for the support surface 54 is a complementary conical surface on the clamping ring 51 and the overlap 53. Due to the radial clamping force of the clamping ring 60 and the mutually acting conical surfaces creates a resulting clamping force, the clamping ring 60 against the clamping ring side end 41st the residual air gap disk 40 presses.

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)

Abstract

The invention relates to a magnet assembly, particularly for a solenoid valve of a fuel injector, having a magnetic core (21) and an armature (22). On one end face (23), on the armature plate side, the magnetic core (21) has an inner pole surface (24a) and an outer pole surface (25a). A residual air gap disc (40) is arranged between the magnetic core (21) and the armature (22), said residual air gap disc being held on the armature plate-side end face (23) of the magnetic core (21) by means of a clamping connection (50). The clamping connection (50) has a tension ring (60) which presses the residual air gap disc (40) against the armature plate-side end face (23) of the magnetic core (21).

Description

Beschreibung Titel  Description title
Magnetbaugruppe, insbesondere für ein Magnetventil eines Kraftstoffinjektors Stand der Technik  Magnetic assembly, in particular for a solenoid valve of a fuel injector prior art
Die Erfindung betrifft eine Magnetbaugruppe, insbesondere für ein Magnetventil eines Kraftstoffinjektors nach dem Oberbegriff des Anspruchs 1. The invention relates to a magnet assembly, in particular for a solenoid valve of a fuel injector according to the preamble of claim 1.
Bei Common-Rail-Injektoren werden sogenannte Servo-Ventile eingesetzt, die den Druck in einem Steuerraum steuern. Als Aktor für derartige Servo-Ventile werden u. a. Magnetaktoren eingesetzt. Derartige Magnetaktoren weisen eine Magnetbaugruppe mit einem Magnetkern und einem Magnetanker auf, wobei zur Einstellung eines minimalen Restluftspalts zwischen einer Ankerfläche und einer Polfläche eine sogenannte Restluftspaltscheibe eingesetzt wird. Die Common rail injectors use so-called servo valves, which control the pressure in a control room. As an actuator for such servo valves u. a. Magnetic actuators used. Such magnetic actuators have a magnet assembly with a magnetic core and a magnet armature, wherein a so-called residual air gap disk is used to set a minimum residual air gap between an armature surface and a pole face. The
Restluftspaltscheibe hat die Funktion, Remanenzeffekte zu begrenzen Residual air gap disc has the function to limit remanence effects
(magnetisches Kleben) und darüber hinaus eine Dämpfung beim Anschlagen des Magnetankers am Magnetkern zu realisieren. Die Restluftspaltscheibe kann dabei über dem Innenpol oder Außenpol des Magnetkerns angeordnet sein. (Magnetic bonding) and also to realize a damping when hitting the magnet armature on the magnetic core. The residual air gap disk can be arranged above the inner pole or outer pole of the magnetic core.
Aus DE 10 2009 001 706 AI ist eine Magnetbaugruppe bekannt, bei der eine außen liegende Restluftspaltscheibe zwischen dem Magnetkern und einer den Magnetkern aufnehmenden Magnethülse eingeklemmt ist. Da für eine eindeutige Lage des Magnetkerns hohe Kräfte notwendig sind und die Berührungsflächen zwischen Magnetkern und Magnethülse nicht ideal planparallel gefertigt werden können, hat diese Lösung den Nachteil, dass die Restluftspaltscheibe zu hohen mechanischen Belastungen ausgesetzt ist. From DE 10 2009 001 706 Al a magnetic assembly is known, in which an outer residual air gap disk is clamped between the magnetic core and a magnetic sleeve receiving the magnetic core. Since high forces are necessary for an unambiguous position of the magnetic core and the contact surfaces between the magnetic core and magnetic sleeve can not be produced ideally coplanar, this solution has the disadvantage that the residual air gap disc is exposed to high mechanical loads.
Offenbarung der Erfindung Die Magnetbaugruppe mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass nur sehr geringe Anforderungen an die Disclosure of the invention The magnetic assembly with the characterizing features of claim 1 has the advantage that only very low demands on the
Fertigungstoleranzen von Magnetkern und Magnethülse gestellt werden müssen. Die Klemmverbindung mittels des Spannrings ermöglicht, dass geometrische Toleranzen und Ausdehnungen aufgrund von Temperatureinflüssen kompensiert werden können. Manufacturing tolerances of magnetic core and magnetic sleeve must be provided. The clamping connection by means of the clamping ring allows geometric tolerances and expansions due to temperature influences can be compensated.
Vorteilhafte Weiterbildungen der Erfindung sind durch die Maßnahmen der Unteransprüche möglich. Advantageous developments of the invention are possible by the measures of the subclaims.
Zweckmäßigerweise drückt der Spannring die Restluftspaltscheibe an die Außenpolfläche. Eine zweckmäßige kraftschlüssige Verbindung zwischen der ankerplattenseitigen Stirnseite des Magnetkerns und der Restluftspaltscheibe wird erreicht, indem eine Spannringaufnahme mit einer Gegenfläche vorgesehen ist, in welcher der Spannring aufgenommen ist, wobei sich der Spannring mit einer radialen Spannkraft an der Gegenfläche abstützt und mittels einer an der Gegenfläche abgeleiteten resultierenden Spannkraft gegen die Conveniently, the clamping ring presses the residual air gap disc on the Außenpolfläche. An appropriate non-positive connection between the armature plate side end of the magnetic core and the residual air gap disc is achieved by a clamping ring receptacle is provided with a counter surface in which the clamping ring is received, wherein the clamping ring is supported with a radial clamping force on the counter surface and by means of a counter surface derived resulting resilience against the
Restluftspaltscheibe drückt. Residual air gap disk presses.
Die Spannringaufnahme mit der Gegenfläche ist zweckmäßigerweise an einem an einer Magnethülse angeordneten Übergriff ausgebildet, der die The clamping ring receptacle with the mating surface is expediently formed on an overlap arranged on a magnet sleeve, which holds the
ankerplattenseitigen Stirnseite des Magnetkerns radial übergreift, so dass die Gegenfläche mit axialen Abstand radial unter der Restluftspaltscheibe liegt. Ankerplattenseitigen end side of the magnetic core radially overlaps, so that the mating surface is at an axial distance radially below the residual air gap disc.
Der Spannring kann einen runden Querschnitt oder einen Querschnitt mit mindesten einer konischen Stützfläche aufweisen. Bei einem runden Querschnitt ist die Gegenfläche zum Abstützen des Spannrings eine Schräge, die die resultierende Spannkraft in Richtung der Restluftspaltscheibe erzeugt, oder die Gegenfläche zum Abstützen des Spannrings ist eine an einem Spalt The clamping ring may have a round cross section or a cross section with at least one conical support surface. In a circular cross-section, the counter surface for supporting the clamping ring is a bevel, which generates the resulting clamping force in the direction of the residual air gap disc, or the counter surface for supporting the clamping ring is one at a gap
ausgebildete Klemmfläche, so dass sich der Spannring aufgrund seiner radialen Spannkraft im Spalt verkeilt und mit der resultierenden Spannkraft gegen die Restluftspaltscheibe drückt. Bei einem Spannring mit einer konischen trained clamping surface, so that the clamping ring wedged in the gap due to its radial clamping force and presses with the resulting clamping force against the residual air gap disc. For a clamping ring with a conical
Stützfläche ist die Stützfläche am Außenumfang des Spannrings ausgebildet, mit der sich der Spannring an einer dazu komplementären konischen Fläche als Gegenfläche abstützt. Support surface, the support surface is formed on the outer circumference of the clamping ring, with the clamping ring is supported on a complementary conical surface as a counter surface.
Ausführungsbeispiele embodiments
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it:
Fig. 1 einen Querschnitt durch ein Magnetventil mit einer erfindungsgemäßenFig. 1 shows a cross section through a solenoid valve with an inventive
Magnetbaugruppe, Magnet assembly,
Fig. 2 einen vergrößerten Ausschnitt X aus Fig. 1 gemäß einer ersten Fig. 2 is an enlarged detail X of Fig. 1 according to a first
Ausführungsform,  embodiment,
Fig. 3 einen vergrößerten Ausschnitt X aus Fig. 1 gemäß einer zweiten  Fig. 3 is an enlarged detail X of Fig. 1 according to a second
Ausführungsform,  embodiment,
Fig. 4 einen vergrößerten Ausschnitt X aus Fig. 1 gemäß einer dritten  Fig. 4 is an enlarged detail X of Fig. 1 according to a third
Ausführungsform und  Embodiment and
Fig. 5 einen Draufsicht auf einen Spannring. Fig. 5 is a plan view of a clamping ring.
Das in Fig. 1 darstellte Magnetventil eines Kraftstoffinjektors weist ein The illustrated in Fig. 1 solenoid valve of a fuel injector has
Ventilelement 10 und eine Magnetbaugruppe 20 auf, die in einem Injektorkörper 11 angeordnet sind. Das Ventilelement 10 umfasst ein Schließelement 12, das auf einen Ventilsitz 13 einwirkt. Mittels des Schließelements 12 wird ein Valve element 10 and a magnet assembly 20 which are arranged in an injector body 11. The valve element 10 comprises a closing element 12, which acts on a valve seat 13. By means of the closing element 12 is a
Steuerraum 15 zur Ansteuerung einer nicht dargestellten Düsennadel mit einem Niederdruckraum 16 verbunden oder geschlossen. Control chamber 15 connected to the control of a nozzle needle, not shown, connected to a low-pressure chamber 16 or closed.
Die Magnetbaugruppe 20 umfasst einen Magnetkern 21 und einen Magnetanker 22. Der Magnetkern 21 weist eine ankerplattenseitige Stirnseite 23 auf, die eine Polfläche bildet. Im Magnetkern 21 ist eine Magnetspule 26 eingelassen, so dass am Magnetkern 21 ein Innenpol 24 und ein Außenpol 25 entsteht. An der ankerplattenseitige Stirnseite 23 des Magnetkerns 21 bildet sich somit am Innenpol 24 eine Innenpolfläche 24a und am Außenpol 25 eine Außenpolfläche 25a aus. Der Magnetkern 21 ist in einer Magnethülse 28 aufgenommen, die mittels einer Spannhülse 27 mit dem Injektorkörper 10 verspannt ist. Der Magnetkern 21 liegt mit seiner ankerplattenseltigen Stirnseite 23 auf einer an der Magnethülse 28 ausgebildeten Ringfläche 29 auf. Der Magnetanker 22 weist eine Ankerplatte 31 mit einem Außendurchmesser sowie eine Ankerhülse 33 auf, wobei die Ankerhülse 33 gleichzeitig das The magnet assembly 20 includes a magnetic core 21 and a magnet armature 22. The magnet core 21 has an armature plate side end face 23 which forms a pole face. In the magnetic core 21, a magnetic coil 26 is inserted, so that the magnetic core 21, an inner pole 24 and an outer pole 25 is formed. At the armature plate-side end face 23 of the magnetic core 21, an inner pole face 24a is thus formed at the inner pole 24, and an outer pole face 25a is formed at the outer pole 25. The magnetic core 21 is received in a magnet sleeve 28 which is clamped by means of a clamping sleeve 27 with the injector body 10. The magnetic core 21 rests with its armature plate-like end face 23 on an annular surface 29 formed on the magnet sleeve 28. The armature 22 has an anchor plate 31 with an outer diameter and an anchor sleeve 33, wherein the anchor sleeve 33 at the same time
Schließelement 12 bildet. Der Außendurchmesser begrenzt eine Ankerfläche 32 an der Ankerplatte 31. Die Ankerhülse 33 ist an seiner Außenumfangsfläche in einem am Injektorkörper 10 ausgebildeten Ventilstück 34 geführt. Closing element 12 forms. The outer diameter defines an armature surface 32 on the armature plate 31. The armature sleeve 33 is guided on its outer circumferential surface in a valve piece 34 formed on the injector body 10.
Zwischen dem Magnetkern 21 und dem Magnetanker 22 ist eine Between the magnetic core 21 and the armature 22 is a
Restluftspaltscheibe 40 angeordnet, die als Kreisring ausgeführt ist und somit eine außen liegende Restluftspaltscheibe darstellt. Die Restluftspaltscheibe 40 weist eine spannringseitige Stirnseite 41 und eine magnetkernseitige Stirnseite 42 auf und wird an der ankerplattenseitige Stirnseite 23 des Magnetkerns 21 im Bereich der Außenpolfläche 25a mittels einer Klemmverbindung 50 gehalten. Die Klemmverbindung 50 weist eine Spannringaufnahme 51 mit einer Residual air gap disc 40 is arranged, which is designed as a circular ring and thus represents an outer residual air gap disc. The residual air gap disk 40 has a clamping-ring-side end face 41 and a magnet core-side end face 42 and is held on the armature-plate-side end face 23 of the magnetic core 21 in the region of the outer pole face 25a by means of a clamping connection 50. The clamp connection 50 has a clamping ring holder 51 with a
Gegenfläche 52 und einem Spannring 60 auf. Der Spannring 60 besitzt eine radiale Spannkraft, mit der sich der Spannring 60 an der in der  Counter surface 52 and a clamping ring 60. The clamping ring 60 has a radial clamping force with which the clamping ring 60 at the in the
Spannringaufnahme 51 ausgebildeten Gegenfläche 52 abstützt. Durch die Lage der Gegenfläche 52, die geneigt zur Restluftspaltscheibe 40 weist, wird an der Gegenfläche 52 aus der radialen Spannkraft des Spannrings 60 eine Clamping ring 51 trained counter surface 52 is supported. Due to the position of the mating surface 52, which has inclined to the residual air gap disk 40, on the mating surface 52 from the radial clamping force of the clamping ring 60 a
resultierende Spannkraft in Richtung der Restluftspaltscheibe 40 abgeleitet, so dass der Spannring 60 mit der resultierenden Spannkraft gegen die resulting clamping force in the direction of the residual air gap disc 40 derived so that the clamping ring 60 with the resulting clamping force against the
spannringseitige Stirnseite 41 der Restluftspaltscheibe 40 drückt. Dadurch realisiert der Spannring 60 mit der resultierenden Spannkraft die erforderliche Klemmkraft für die Klemmverbindung 50, mit welcher die Restlustspaltscheibe 40 mit der magnetkernseitigen Stirnseite 42 an der ankerplattenseitigen Stirnseite 23 des Magnetkerns 21 kraftschlüssig gehalten wird. Zum Aufbringen der notwendigen Vorspannung beim Einsetzen des Spannrings 60 in die clamping ring-side end face 41 of the residual air gap disk 40 presses. As a result, the clamping ring 60 realizes with the resulting clamping force the required clamping force for the clamping connection 50, with which the residual gap plate 40 with the magnetic core side end 42 is held frictionally on the armature plate side end face 23 of the magnetic core 21. To apply the necessary bias when inserting the clamping ring 60 in the
Spannringaufnahme 51 weist der Spannring 60 gemäß Figur 5 einen Schlitz 61 auf. Clamping ring 51, the clamping ring 60 according to Figure 5 has a slot 61.
Zur Ausführung der Spannringaufnahme 51 ist an der Magnethülse 28 axial unterhalb der Ringfläche 29 ein Übergriff 53 ausgebildet, der die To carry out the clamping ring holder 51, an overlap 53 is formed on the magnet sleeve 28, axially below the annular surface 29, which overlaps the
ankerplattenseitigen Stirnseite 23 des Magnetkerns 21 übergreift. Am Übergriff 53 der Magnethülse 21 ist die Spannringaufnahme 51 mit der Gegenfläche 52 ausgebildet, so dass die Spannringaufnahme 51 unter der Restluftspaltscheibe 40 angeordnet ist und die Gegenfläche 52 mit axialem Abstand unter der spannringseitigen Stirnseite 41 der Restluftspaltscheibe 40 liegt. Ankerplattenseitigen end face 23 of the magnetic core 21 overlaps. At the overlap 53 of the magnet sleeve 21, the clamping ring holder 51 with the counter surface 52nd formed so that the clamping ring receiver 51 is disposed below the residual air gap disk 40 and the counter surface 52 is located at an axial distance below the clamping ring side end face 41 of the residual air gap disk 40.
Bei den Ausführungsformen in Figur 2 und 3 weist der Spannring 60 einen runden Querschnitt auf. Die Gegenfläche 52 ist bei der Ausführungsform gemäß Figur 2 eine Schräge, auf der der Spannring 60 mit seiner radialen Spannkraft einwirkt und eine entsprechende resultierende Spannkraft in Richtung des Restluftspaltscheibe 60 ableitet, mit der der Spannring 60 gegen die In the embodiments in Figures 2 and 3, the clamping ring 60 has a round cross-section. The counter surface 52 is in the embodiment of Figure 2 is a slope on which the clamping ring 60 acts with its radial clamping force and a corresponding resulting clamping force in the direction of the residual air gap disc 60 dissipates, with the clamping ring 60 against the
spannringseitige Stirnseite 41 der Restluftspaltscheibe 40 drückt. clamping ring-side end face 41 of the residual air gap disk 40 presses.
Bei der Ausführungsform gemäß Figur 3 weist die Spannringaufnahme 51 eine Gegenfläche 52 mit einem kurvenförmigen Verlauf auf. Durch die Kurvenform kann die Spannkraft des Spannrings 60 über den sich einstellenden In the embodiment according to FIG. 3, the clamping ring receptacle 51 has a mating surface 52 with a curved course. Due to the curve shape, the clamping force of the clamping ring 60 can be adjusted over itself
Durchmesser des Spannrings 60 variiert werden. Auch hier drückt der Spannring 60 mit der resultierenden Spannkraft gegen die spannringseitige Stirnseite 41 der Restluftspaltscheibe 40. Diameter of the clamping ring 60 can be varied. Again, the clamping ring 60 presses with the resulting clamping force against the clamping ring-side end face 41 of the residual air gap disc 40th
Es ist aber auch denkbar, dass die Gegenfläche zum Abstützen des Spannrings 60 eine an einem Spalt ausgebildete Klemmfläche ist, wobei sich der Spannring 60 aufgrund seiner radialen Spannkraft im Spalt zwischen der Klemmfläche und der Restluftspaltscheibe 40 verkeilt und mit der resultierenden Spannkraft gegen die Restluftspaltscheibe 40 drückt. But it is also conceivable that the counter surface for supporting the clamping ring 60 is formed on a gap clamping surface, wherein the clamping ring 60 wedged due to its radial clamping force in the gap between the clamping surface and the residual air gap disk 40 and the resulting clamping force against the residual air gap disk 40th suppressed.
Bei der Ausführungsform gemäß Figur 4 weist der Spannring 60 zumindest an der Außenumfangsfläche eine konische Stützfläche 54 auf. Die Gegenfläche 52 für die Stützfläche 54 ist eine dazu komplementäre konische Fläche an der Spannringaufnahme 51 bzw. am Übergriff 53. Durch die radiale Spannkraft des Spannrings 60 und der aufeinander wirkenden konischen Flächen entsteht eine resultierende Spannkraft, die den Spannring 60 gegen die spannringseitige Stirnseite 41 der Restluftspaltscheibe 40 drückt. In the embodiment according to FIG. 4, the clamping ring 60 has a conical support surface 54 at least on the outer peripheral surface. The counter-surface 52 for the support surface 54 is a complementary conical surface on the clamping ring 51 and the overlap 53. Due to the radial clamping force of the clamping ring 60 and the mutually acting conical surfaces creates a resulting clamping force, the clamping ring 60 against the clamping ring side end 41st the residual air gap disk 40 presses.

Claims

Ansprüche claims
1. Magnetbaugruppe, insbesondere für ein Magnetventil eines 1. Magnetic assembly, in particular for a solenoid valve of a
Kraftstoffinjektors, mit einem Magnetkern (21) und einem Magnetanker (22), wobei der Magnetkern (21) an einer ankerplattenseitigen Stirnseite (23) eine Innenpolfläche (24a) und eine Außenpolfläche (25a) aufweist, wobei eine Restluftspaltscheibe (40) zwischen Magnetkern (21) und Magnetanker (22) angeordnet ist, welche an der ankerplattenseitigen Stirnseite (23) des Magnetkerns (21) mittels einer Klemmverbindung (50) gehalten ist, dadurch gekennzeichnet, dass die Klemmverbindung (50) einen Spannring (60) aufweist, der die Restluftspaltscheibe (40) an die ankerplattenseitige Stirnseite (23) des Magnetkerns (21) drückt.  A fuel injector comprising a magnetic core (21) and a magnet armature (22), said magnet core (21) having an inner pole surface (24a) and an outer pole surface (25a) on an armature plate side end (23), a residual air gap disc (40) being sandwiched between said magnetic core (25). 21) and magnet armature (22), which is held on the armature plate side end face (23) of the magnetic core (21) by means of a clamping connection (50), characterized in that the clamping connection (50) has a clamping ring (60), which the Residual air gap disc (40) to the armature plate side end face (23) of the magnetic core (21) presses.
2. Magnetbaugruppe nach Anspruch 1, dadurch gekennzeichnet, dass der Spannring (60) die Restluftspaltscheibe (40) an die Außenpolfläche (25a) drückt. 2. Magnet assembly according to claim 1, characterized in that the clamping ring (60) presses the residual air gap disc (40) to the Außenpolfläche (25 a).
3. Magnetbaugruppe nach Anspruch 1, dadurch gekennzeichnet, dass eine Spannringaufnahme (51) mit einer Gegenfläche (52) vorgesehen ist, an der sich der Spannring (60) mit einer radialen Spannkraft abstützt und mittels einer an der Gegenfläche (52) abgeleiteten resultierenden Spannkraft gegen die Restluftspaltscheibe (40) drückt. 3. Magnet assembly according to claim 1, characterized in that a clamping ring receptacle (51) having a counter surface (52) is provided, on which the clamping ring (60) is supported with a radial clamping force and by means of a on the mating surface (52) derived resulting clamping force presses against the residual air gap disc (40).
4. Magnetbaugruppe nach Anspruch 3, dadurch gekennzeichnet, dass die Spannringaufnahme (51) mit der Gegenfläche (52) an einem an einer Magnethülse (28) angeordneten Übergriff (53) ausgebildet ist, der die ankerplattenseitigen Stirnseite (23) des Magnetkerns (21) übergreift, so dass die Gegenfläche (52) mit axialen Abstand radial unter der 4. Magnet assembly according to claim 3, characterized in that the clamping ring receptacle (51) with the mating surface (52) is arranged on a magnet sleeve (28) disposed over-grip (53), the anchor plate side end face (23) of the magnetic core (21). engages so that the counter surface (52) with axial distance radially below the
Restluftspaltscheibe (40) liegt. Residual air gap disc (40) is located.
5. Magnetbaugruppe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Gegenfläche (52) zum Abstützen des Spannrings (60) eine Schräge ist, die die resultierende Spannkraft in Richtung der Restluftspaltscheibe (40) erzeugt. 5. Magnet assembly according to claim 1, 2 or 3, characterized in that the counter surface (52) for supporting the clamping ring (60) is a slope which generates the resulting clamping force in the direction of the residual air gap disc (40).
6. Magnetbaugruppe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Gegenfläche (52) zum Abstützen des Spannrings (60) einen 6. Magnet assembly according to claim 1, 2 or 3, characterized in that the mating surface (52) for supporting the clamping ring (60) has a
kurvenförmigen Verlauf aufweist, der die resultierende Spannkraft in Richtung der Restluftspaltscheibe (40) erzeugt.  has a curved course, which generates the resulting clamping force in the direction of the residual air gap disc (40).
7. Magnetbaugruppe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Gegenfläche (52) zum Abstützen des Spannrings (60) eine an einem Spalt ausgebildete Klemmfläche ist, dass sich der Spannring (60) aufgrund seiner radialen Spannkraft im Spalt zwischen der Klemmfläche und der Restluftspaltscheibe (40) verkeilt und mit der resultierenden Spannkraft gegen die Restluftspaltscheibe (40) drückt. 7. Magnet assembly according to claim 1, 2 or 3, characterized in that the counter surface (52) for supporting the clamping ring (60) is formed on a gap clamping surface, that the clamping ring (60) due to its radial clamping force in the gap between the Wedged clamping surface and the residual air gap disc (40) and presses with the resulting clamping force against the residual air gap disc (40).
8. Magnetbaugruppe nach Anspruch 1, dadurch gekennzeichnet, dass der Spannring (60) einen runden Querschnitt aufweist 8. Magnet assembly according to claim 1, characterized in that the clamping ring (60) has a round cross-section
9. Magnetbaugruppe nach Anspruch 1, dadurch gekennzeichnet, dass der Spannring (60) am Außenumfang eine konische Stützfläche (54) aufweist, mit der sich der Spannring (60) an einer dazu komplementären konischen Fläche als Gegenfläche (52) abstützt. 9. Magnet assembly according to claim 1, characterized in that the clamping ring (60) on the outer circumference a conical support surface (54), with which the clamping ring (60) on a complementary conical surface as a counter surface (52) is supported.
10. Magnetbaugruppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Restluftspaltscheibe (40) als Kreisring ausgeführt ist. 10. Magnet assembly according to one of the preceding claims, characterized in that the residual air gap disc (40) is designed as a circular ring.
EP13706474.7A 2012-04-16 2013-02-20 Magnet assembly, particularly for a solenoid valve of a fuel injector Active EP2839143B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012206215A DE102012206215A1 (en) 2012-04-16 2012-04-16 Magnetic assembly, in particular for a solenoid valve of a fuel injector
PCT/EP2013/053344 WO2013156179A1 (en) 2012-04-16 2013-02-20 Magnet assembly, particularly for a solenoid valve of a fuel injector

Publications (2)

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EP2839143A1 true EP2839143A1 (en) 2015-02-25
EP2839143B1 EP2839143B1 (en) 2018-08-01

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DE (1) DE102012206215A1 (en)
WO (1) WO2013156179A1 (en)

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DE2948874A1 (en) * 1979-12-05 1981-06-11 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE VALVE
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ITTO20001230A1 (en) * 2000-12-29 2002-06-29 Fiat Ricerche FUEL INJECTOR FOR AN INTERNAL COMBUSTION ENGINE.
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DE102015213739A1 (en) 2015-07-21 2017-01-26 Robert Bosch Gmbh Fuel injector and method of making a fuel injector
WO2017012730A1 (en) 2015-07-21 2017-01-26 Robert Bosch Gmbh Fuel injector and method for producing a fuel injector

Also Published As

Publication number Publication date
DE102012206215A1 (en) 2013-10-17
EP2839143B1 (en) 2018-08-01
WO2013156179A1 (en) 2013-10-24

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