EP0076459A1 - Electromagnetic valve, in particulier fuel injection valve - Google Patents

Electromagnetic valve, in particulier fuel injection valve Download PDF

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Publication number
EP0076459A1
EP0076459A1 EP82108989A EP82108989A EP0076459A1 EP 0076459 A1 EP0076459 A1 EP 0076459A1 EP 82108989 A EP82108989 A EP 82108989A EP 82108989 A EP82108989 A EP 82108989A EP 0076459 A1 EP0076459 A1 EP 0076459A1
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EP
European Patent Office
Prior art keywords
solenoid valve
armature
valve according
plate
air gap
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
EP82108989A
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German (de)
French (fr)
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EP0076459B1 (en
Inventor
Asta Hascher-Reichl
Hans Kubach
Werner Gross
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
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Robert Bosch GmbH
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Publication date
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Publication of EP0076459A1 publication Critical patent/EP0076459A1/en
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Publication of EP0076459B1 publication Critical patent/EP0076459B1/en
Expired 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
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
    • 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
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection

Definitions

  • the invention is based on a solenoid valve, in particular a fuel injection valve according to the preamble of the main claim.
  • Such a fuel injection valve is already known from German patent application P 30 46 889.4, in which the valve part, which is firmly connected to the flat armature, projects through a central guide opening of a guide membrane.
  • the guide membrane guides the valve part in a radial direction to the valve seat.
  • the flat anchor touches the guide membrane under spring tension with a concentric guide edge and is thus guided plane-parallel to the end face of the core designed as a shell core.
  • the fuel is supplied to the valve through radial inflow openings in the valve wall. After flowing through the magnetic part, the unassigned fuel can enter a fuel return flow line via radial discharge openings which are axially offset and sealed with respect to the inflow openings.
  • this fuel injection valve has a large mass overall.
  • the air gaps that form the anchor with the column core are very far apart in terms of their circumference, so that the anchor must have a large diameter, which increases its mass and reduces its bending rigidity.
  • the guidance of the valve part and the armature is not always sufficient, despite the guide membrane.
  • the solenoid valve according to the invention with the characterizing features of the main claim has the advantage that its mass and thus its weight is low. Due to the special design of the magnetic circuit, the solenoid valve has very short switching times.
  • the shape of the armature means that the distance between the air gaps with respect to the diameter of the armature is small.
  • the inner diameter of the magnetic circuit is expanded by the arrangement of the guide bush and the spring within the inner cylinder. This increases the length of the air gaps in the same area, which means that the mag net force grows with constant wall thickness.
  • the one bearing point of the valve tappet in the cylinder bore is in the immediate vicinity of the air gaps, so that only small tilting forces arise due to tolerances in the air gaps.
  • the second bearing point can thus be arranged at a short distance from the first bearing point, so that the armature can be built easily and has a very high and easily damped mechanical natural frequency.
  • the construction according to the invention largely keeps the mechanical forces away from the magnetic circuit, so that the magnetic parts can be made as thin as is optimal for the magnetic circuit alone. Due to the greater mass of the stop plate compared to the mass of the armature with the valve body, the impact is damped mechanically quickly, with the raised parts of the stop plate supporting the damping. The armature strikes the stop plate in the region of the disk-shaped head of the valve body, which is made of antimagnetic and mechanically hard material, so that a long service life is ensured.
  • the functionally important data such as stroke and switching time can be set inexpensively by plastic deformation on the annular grooves in the stop plate and in the annular magnetic plate.
  • This data can be preset by pairing the dimensional tolerances of the ring-shaped magnetic plate and the magnetic armature.
  • the magnetic conductors adjacent to the air gaps are made of magnetic material with high saturation induction, while the remaining parts of the magnetic circuit are made of magnetic material with the most favorable dynamic properties.
  • valve tappet can be machined with the magnetic armature as well as the cylinder bore in the guide bush with the valve seat in one setting, so that circular symmetry is forced.
  • 1 denotes the valve housing.
  • a core 2 made of ferromagnetic material is provided inside the valve housing 1, on which a conductor coil 3 is applied.
  • the core 2 has an inner cylinder 4 and an outer cylinder 5, which are arranged concentrically to one another.
  • Inner cylinder 4 and outer cylinder 5 are magnetically conductively connected to one another on one end face via a yoke 6.
  • the other end face is partially covered by a magnetically conductive annular plate 7 which is magnetically connected to the outer cylinder 5.
  • the inner cylinder 4 carries a coil former 8 on which the conductor coil 3 is wound, which takes up the entire space between the inner and outer cylinders 4, 5.
  • the armature 10 has a plate-shaped part 11 which merges into a hollow cylindrical connecting piece 12.
  • the connecting piece 12 faces one end face of the inner cylinder 4.
  • the first air gap 13 lies between the two.
  • the edge of the plate-shaped part 11 projects beyond the annular plate 7 and forms with it the second air gap 14 his disk-shaped head 16 pressed into the plate-shaped part 11 of the armature 10. It is guided with two bearing points 18, 19 in the cylinder bore 20 of a guide bush 21.
  • the guide bushing 21 merges into an anti-magnetic part 22, which has the inlet 23 and the outlet bores 24 in extension to the cylinder bore 20 of the guide bushing 21.
  • the drain holes 24 open into a cavity 25, which is formed by the anti-magnetic part 22 and the core 2.
  • the inlet 23 ends in a valve chamber 26 which is connected to the cavity 25 by a connecting bore 27.
  • the valve body 15 cooperates with its spherical end 28 with a valve seat 29 which is arranged between the valve chamber 26 and the inlet 23.
  • the 0-rings 30 seal the high pressure in the area 31 against the low liquid pressure (return pressure) in the valve chamber 26, the connecting bore 27, the cavity 25, the drain holes 24 and all other cavities of the solenoid valve.
  • a gap 32 is provided between the anti-magnetic part 22, a part of the outer cylinder 5 and the valve housing 1.
  • a pressure relief bore 33 is located between the cavity 25 and the gap 32.
  • the coil space 34 is cooled with liquid via the gap 32 and a bore 50 which is provided in the outer cylinder and connects the coil space 34 with the gap 32.
  • the guide bushing 21 has a recess on its outer jacket, into which a spring 35 is let in and which at its other end presses against the disk-shaped head 16 of the valve body 15 let into the plate-shaped part 11 of the armature 10.
  • the spring 35 supports the hydraulic pressure on the spherical end 28 of the plunger 17 in such a way that the valve opens quickly when the power is switched off and remains in this position even without pressure.
  • a stop plate 36 is provided above the armature 10 and the annular plate 7. With the help of this stop plate 36, the impact is quickly dampened when the valve is opened.
  • the stop plate 36 has a raised shoulder 37 in the area of the impact, so that the anchor 10 only strikes a defined surface area.
  • This approach 37 is opposed to the disk-shaped head 16 made of hard antimagnetic material, which is pressed into the armature 10, so that wear is only very slight even when the solenoid valve is used for a long time.
  • a groove 38 is provided in the stop plate 36, which weakens the anti-magnetic stop plate 36 to such an extent that it can be plastically deformed there for adjusting the system.
  • Another groove 39 is provided in the annular plate 7 made of magnetic material, which can be plastically deformed at the point in such a way that the second air gap 14 can be set functionally. This deformation should be possible after assembly of the stop plate 36, so that the stop plate 36 is broken through to apply the forces to the top of the annular plate 7.
  • the solenoid valve is closed off by a metallic cover plate 40 and by an electrically insulating plastic part 41 applied above it, which are let into the valve housing 1.
  • the connecting pins 43 are injected into the plastic part 41 with the plug guides 42.
  • the electrical connection of the connecting pins 43 to the coil 3 takes place via the current leads 44. These are injected into the coil body 8.
  • the electrical conductor wires 45 of the coil 3 are wound at their ends around a pin 46, which is part of the coil body 8, in order to ensure strain relief.
  • the end of the conductor wire 45 is welded to a not shown flag of the power supply 44.
  • the power supply 44 is inserted into the electrically conductive connector pin 43 via a bend 47 for strain relief.
  • the valve When the valve is blocked, a high pressure is created in the inlet 23, which acts as a force on the area 31 of the antimagnetic part 22.
  • the antimagnetic part 22 in the region 48 is made so strong that the force can be guided onto the circumference of the outer cylinder 5, although it is as thin as it is with regard to switching times, optimal magnet design is required.
  • a bore 49 is provided in the disk-shaped head 16 of the armature 10, through which the liquid displaced during the filling stroke of the plunger 17 can flow back, just as through the pressure relief bore 33.
  • the shoulder 51 of the magnetic outer cylinder 5 and the pole 52 of the magnetic inner cylinder 4 facing the first air gap 13 are of equal height in the axial direction.

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

Abstract

Es wird ein Magnetventil, insbesondere ein Kraftstoffeinspritzventil für Brennkraftmaschinen vorgeschlagen, das ein Ventilgehäuse, eine auf einen Kern aus ferromagnetischem Material aufgebrachte Leiterspule und einen Anker, der einen mit einem Ventilsitz zusammenwirkenden Ventilkörper trägt, aufweist. Der Kern weist einen Innen- und einen Außenzylinder auf, die an der einen Stirnseite über ein Joch magnetisch leitend miteinander verbunden sind. An der anderen Stirnseite ist eine kreisringförmige Platte mit dem Außenzylinder magnetisch leitend verbunden. Der Magnetkreis wird zwischen kreisringförmiger Platte und Innezylinder über einen Anker geschlossen, der ein tellerförmiges Teil und einen hohlzylindrischen Stutzen aufweist. Der Stutzen liegt dem Innenzylinder gegenüber und bildet mit ihm einen ersten Luftspalt. Der Rand des tellerförmigen Teils des Ankers liegt der kreisringförmigen Platte gegenüber und bildet mit ihr einen zweiten Luftspalt.A solenoid valve, in particular a fuel injection valve for internal combustion engines, is proposed which has a valve housing, a conductor coil applied to a core made of ferromagnetic material and an armature which carries a valve body which interacts with a valve seat. The core has an inner and an outer cylinder, which are magnetically conductively connected to one another on one end face via a yoke. On the other end face, an annular plate is connected to the outer cylinder in a magnetically conductive manner. The magnetic circuit is closed between the annular plate and the inner cylinder via an armature which has a plate-shaped part and a hollow cylindrical connector. The nozzle is opposite the inner cylinder and forms a first air gap with it. The edge of the plate-shaped part of the armature lies opposite the annular plate and forms a second air gap with it.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Magnetventil, insbesondere Kraftstoffeinspritzventil nach der Gattung des Hauptanspruchs.The invention is based on a solenoid valve, in particular a fuel injection valve according to the preamble of the main claim.

Aus der deutschen Patentanmeldung P 30 46 889.4 ist schon ein derartiges Kraftstoffeinspritzventil bekannt, bei dem das mit dem Flachanker fest verbundene Ventilteil eine zentrale Führungsöffnung einer Führungsmembran durchragt. Die Führungsmembran führt das Ventilteil in radialer Richtung zum Ventilsitz. Der Flachanker berührt unter Federspannung mit einer konzentrischen Führungskante die Führungsmembran und wird so planparallel zur Stirnfläche des als Schalenkern ausgebildeten Kerns geführt. Die Kraftstoffzufuhr zum Ventil erfolgt durch radiale Zuströmöffnungen in der Ventilwand. Der nicht zugemessene Kraftstoff kann nach Durchströmen des Magnetteiles über axial gegenüber den Zufluß- öffnungen versetzte und abgedichtete radiale Abflußöffnungen in eine Kraftstoffrückströmleitung gelangen.Such a fuel injection valve is already known from German patent application P 30 46 889.4, in which the valve part, which is firmly connected to the flat armature, projects through a central guide opening of a guide membrane. The guide membrane guides the valve part in a radial direction to the valve seat. The flat anchor touches the guide membrane under spring tension with a concentric guide edge and is thus guided plane-parallel to the end face of the core designed as a shell core. The fuel is supplied to the valve through radial inflow openings in the valve wall. After flowing through the magnetic part, the unassigned fuel can enter a fuel return flow line via radial discharge openings which are axially offset and sealed with respect to the inflow openings.

Dieses Kraftstoffeinspritzventil weist jedoch insgesamt eine große Masse auf. Die Luftspalte, die den Anker mit dem Srhalenkern bilden, liegen in bezug auf den Umfang sehr weit aaseinander, so daß der Anker einen großen Durchmesser haben muß, was seine Masse vergrößert und seine Biegesteifigkeit reduziert. Außerdem ist die Führung des Ventilteils und des Ankers trotz der Führungsmembran nicht immer ausreichend.However, this fuel injection valve has a large mass overall. The air gaps that form the anchor with the column core are very far apart in terms of their circumference, so that the anchor must have a large diameter, which increases its mass and reduces its bending rigidity. In addition, the guidance of the valve part and the armature is not always sufficient, despite the guide membrane.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße Magnetventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß seine Masse und damit sein Gewicht gering ist. Durch die besondere Ausbildung des Magnetkreises weist das Magnetventil sehr kurze Schaltzeiten auf. Die Form des Ankers bringt es mit sich, daß der Abstand der Luftspalte in bezug auf den Durchmesser des Ankers gesehen, gering ist. Damit werden die Vorteile des bekannten Flachankers ausgenutzt (doppelte Kraft bei gleichem Magnetfluß durch zwei krafterzeugende Luftspaite) ohne dessen Nachteil, nämlich die Tatsache, daß der äußere Spalt geometrisch sehr weit auslädt, was die Ankermasse vergrößert und die Biegesteifigkeit des Ankers reduziert, mit sich zu bringen. Eine ausreichende räumliche Trennung zur Reduzierung des magnetischen Streuflusses ist in der vorliegenden Erfindung dadurch vorhanden, daß die Luftspalte, in axialer Richtung gesehen, versetzt sind.The solenoid valve according to the invention with the characterizing features of the main claim has the advantage that its mass and thus its weight is low. Due to the special design of the magnetic circuit, the solenoid valve has very short switching times. The shape of the armature means that the distance between the air gaps with respect to the diameter of the armature is small. Thus, the advantages of the known flat anchor are exploited (double force with the same magnetic flux through two force-generating air spars) without its disadvantage, namely the fact that the outer gap is geometrically very wide, which increases the anchor mass and reduces the bending stiffness of the anchor bring. A sufficient spatial separation for reducing the magnetic stray flux is present in the present invention in that the air gaps are offset, seen in the axial direction.

Durch die in den Unteransprüchen angegebenen Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen möglich. Durch die Anordnung der Führungsbuchse und der Feder innerhalb des Innenzylinders wird der Innendurchmesser des Magnetkreises konstruktiv aufgeweitet. Damit wird die umfangmäßige Länge der Luftspalte bei gleicher Fläche vergrößert, wodurch die Magnetkraft bei konstanter Wandstärke wächst. Die eine Lagerstelle des Ventilstößels in der Zylinderbohrung liegt in unmittelbarer Nähe der Luftspalte, so daß nur geringe Kippkräfte durch Toleranzen der Luftspalte entstehen. Damit kann die zweite Lagerstelle in kurzem Abstand zur ersten Lagerstelle angeordnet werden, so daß der Anker leicht gebaut werden kann und eine sehr hohe und leicht zu dämpfende mechanische Eigenfrequenz erhält.Advantageous further developments and improvements are possible through the measures specified in the subclaims. The inner diameter of the magnetic circuit is expanded by the arrangement of the guide bush and the spring within the inner cylinder. This increases the length of the air gaps in the same area, which means that the mag net force grows with constant wall thickness. The one bearing point of the valve tappet in the cylinder bore is in the immediate vicinity of the air gaps, so that only small tilting forces arise due to tolerances in the air gaps. The second bearing point can thus be arranged at a short distance from the first bearing point, so that the armature can be built easily and has a very high and easily damped mechanical natural frequency.

Durch die erfindungsgemäße Konstruktion werden die mechanischen Kräfte weitgehend vom Magnetkreis ferngehalten, so daß die magnetischen Teile so dünn ausgeführt werden können, wie es allein für den Magnetkreis optimal ist. Durch die größere Masse der Anschlagplatte im Vergleich zur Masse des Ankers mit dem Ventilkörper wird der Aufschlag mechanisch schnell gedämpft, wobei die erhabenen Teile der Anschlagplatte die Dämpfung unterstützen. Der Anker trifft im Bereich des scheibenförmigen Kopfes des Ventilkörpers auf die Anschlagplatte, der aus antimagnetischem und mechanisch hartem Material besteht, so daß eine große Lebensdauer gewährleistet ist.The construction according to the invention largely keeps the mechanical forces away from the magnetic circuit, so that the magnetic parts can be made as thin as is optimal for the magnetic circuit alone. Due to the greater mass of the stop plate compared to the mass of the armature with the valve body, the impact is damped mechanically quickly, with the raised parts of the stop plate supporting the damping. The armature strikes the stop plate in the region of the disk-shaped head of the valve body, which is made of antimagnetic and mechanically hard material, so that a long service life is ensured.

Die funktional wesentlichen Daten wie Hub- und Schaltzeit können durch plastische Verformung an den kreisringförmigen Nuten in der Anschlagplatte und in der kreisringförmigen magnetischen Platte kostengünstig eingestellt werden. Eine Voreinstellung dieser Daten ist durch Paarung der Maßtoleranzen der ringförmigen magnetischen Platte und des magnetischen Ankers möglich.The functionally important data such as stroke and switching time can be set inexpensively by plastic deformation on the annular grooves in the stop plate and in the annular magnetic plate. This data can be preset by pairing the dimensional tolerances of the ring-shaped magnetic plate and the magnetic armature.

Die an die Luftspalte angrenzenden Magnetleiter wie Anker, kreisringförmige Platte, und Innenzylinder sind aus Magnetmaterial mit hoher Sättigungsinduktion hergestellt, während die restlichen Teile des Magnetkreises aus Magnetmaterial mit möglichst günstigen dynamischen Eigenschaften hergestellt sind.The magnetic conductors adjacent to the air gaps, such as armatures, annular plates, and inner cylinders, are made of magnetic material with high saturation induction, while the remaining parts of the magnetic circuit are made of magnetic material with the most favorable dynamic properties.

Dadurch wird neben hoher Kraft bei kleinem Magnetfluß eine große Änderung des Magnetflusses in Abhängigkeit vom Hub im Bereich des Aufschlags erzielt.In addition to high force with a small magnetic flux, this results in a large change in the magnetic flux as a function of the stroke in the area of the impact.

Der Ventilstößel kann mit dem Magnetanker ebenso wie die Zylinderbohrung in der Führungsbuchse mit dem Ventilsitz in je einer Aufspannung bearbeitet werden, so daß Kreissymmetrie erzwungen wird.The valve tappet can be machined with the magnetic armature as well as the cylinder bore in the guide bush with the valve seat in one setting, so that circular symmetry is forced.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigt die einzige Figur einen Schnitt durch das erfindungsgemäße Magnetventil.An embodiment of the invention is shown in the drawing and is explained in more detail in the following description. The only figure shows a section through the solenoid valve according to the invention.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Bei dem in der Figur dargestellten erfindungsgemäßen Magnetventil ist mit 1 das Ventilgehäuse bezeichnet. Innerhalb des Ventilgehäuses 1 ist ein Kern 2 aus ferromagnetischem Material vorgesehen, auf dem eine Leiterspule 3 aufgebracht ist. Der Kern 2 weist einen Innenzylinder 4 und einen Außenzylinder 5 auf, die konzentrisch zueinander angeordnet sind. Innenzylinder 4 und Außenzylinder 5 sind an der einen Stirnfläche über ein Joch 6 magnetisch leitend miteinander verbunden. Die andere Stirnfläche ist teilweise durch eine magnetisch leitende kreisringförmige Platte 7 abgedeckt, die magnetisch leitend mit dem Außenzylinder 5 verbunden ist. Der Innenzylinder 4 trägt einen Spulenkörper 8, auf den die Leiterspule 3 gewickelt ist, die den gesamten Raum zwischen Innen-und Außenzylinder 4, 5 einnimmt. Zwischen Leiterspule 3 und Joch 6 liegt eine Isolierfolie 9, die einen kleinen Wärmewiderstand aufweist. Der zwischen dem Innenzylinder 4 und der kreisringförmigen Platte 7 unterbrochene Magnetkreis wird durch einen Anker 10 überbrückt. Der Anker 10 weist ein tellerförmiges Teil 11 auf, das in einen hohlzylindrischen Stutzen 12 übergeht. Der Stutzen 12 steht der einen Stirnfläche des Innenzylinders 4 gegenüber. Zwischen beiden liegt der erste Luftspalt 13. Der Rand des tellerförmigen Teils 11 ragt über die kreisringförmige Platte 7 hinaus und bildet mit ihr den zweiten Luftspalt 14. Ein Ventilkörper 15 aus antimagnetischem Material, der einen scheibenförmigen Kopf 16 und einen Stößel 17 aufweist, ist mit seinem scheibenförmigen Kopf 16 in das tellerförmige Teil 11 des Ankers 10 eingepreßt. Er wird mit zwei Lagerstellen 18, 19 in der Zylinderbohrung 20 einer Führungsbuchse 21 geführt. Die Führungsbuchse 21 geht in ein antimagnetisches Teil 22 über, das in Verlängerung zur Zylinderbohrung 20 der Führungsbuchse 21 den Zulauf 23 und die Ablaufbohrungen 24 aufweist. Die Ablaufbohrungen 24 münden in einen Hohlraum 25, der durch das antimagnetische Teil 22 und den Kern 2 gebildet wird. Der Zulauf 23 endet in einer Ventilkammer 26, die durch eine Verbindungsbohrung 27 mit dem Hohlraum 25 verbunden ist. Der Ventilkörper 15 arbeitet mit seinem kugelförmigen Ende 28 mit einem Ventilsitz 29 zusammen, der zwischen Ventilkammer 26 und Zulauf 23 angeordnet ist. Die 0-Ringe 30 dichten den Hochdruck im Bereich 31 gegen den niedrigen Flüssigkeitsdruck (Rücklaufdruck) in der Ventilkammer 26, der Verbindungsbohrung 27, dem Hohlraum 25, den Ablaufbohrungen 24 und allen anderen Hohlräumen des Magnetventils ab. Zwischen antimagnetischem Teil 22, einem Teil des Außenzylinders 5 und dem Ventilgehäuse 1 ist ein Spalt 32 vorgesehen. Zwischen Hohlraum 25 und Spalte 32 befindet sich eine Druckentlastungsbohrung 33. Der Spulenraum 34 wird über den Spalt 32 und eine Bohrung 50, die im Außenzylinder vorgesehen ist und Spulenraum 34 mit Spalt 32 verbindet, mit Flüssigkeit gekühlt.In the solenoid valve according to the invention shown in the figure, 1 denotes the valve housing. A core 2 made of ferromagnetic material is provided inside the valve housing 1, on which a conductor coil 3 is applied. The core 2 has an inner cylinder 4 and an outer cylinder 5, which are arranged concentrically to one another. Inner cylinder 4 and outer cylinder 5 are magnetically conductively connected to one another on one end face via a yoke 6. The other end face is partially covered by a magnetically conductive annular plate 7 which is magnetically connected to the outer cylinder 5. The inner cylinder 4 carries a coil former 8 on which the conductor coil 3 is wound, which takes up the entire space between the inner and outer cylinders 4, 5. Between the conductor coil 3 and the yoke 6 there is an insulating film 9 which has a small thermal resistance. The between that Inner cylinder 4 and the annular plate 7 interrupted magnetic circuit is bridged by an armature 10. The armature 10 has a plate-shaped part 11 which merges into a hollow cylindrical connecting piece 12. The connecting piece 12 faces one end face of the inner cylinder 4. The first air gap 13 lies between the two. The edge of the plate-shaped part 11 projects beyond the annular plate 7 and forms with it the second air gap 14 his disk-shaped head 16 pressed into the plate-shaped part 11 of the armature 10. It is guided with two bearing points 18, 19 in the cylinder bore 20 of a guide bush 21. The guide bushing 21 merges into an anti-magnetic part 22, which has the inlet 23 and the outlet bores 24 in extension to the cylinder bore 20 of the guide bushing 21. The drain holes 24 open into a cavity 25, which is formed by the anti-magnetic part 22 and the core 2. The inlet 23 ends in a valve chamber 26 which is connected to the cavity 25 by a connecting bore 27. The valve body 15 cooperates with its spherical end 28 with a valve seat 29 which is arranged between the valve chamber 26 and the inlet 23. The 0-rings 30 seal the high pressure in the area 31 against the low liquid pressure (return pressure) in the valve chamber 26, the connecting bore 27, the cavity 25, the drain holes 24 and all other cavities of the solenoid valve. A gap 32 is provided between the anti-magnetic part 22, a part of the outer cylinder 5 and the valve housing 1. A pressure relief bore 33 is located between the cavity 25 and the gap 32. The coil space 34 is cooled with liquid via the gap 32 and a bore 50 which is provided in the outer cylinder and connects the coil space 34 with the gap 32.

Die Führungsbuchse 21 weist an seinem Außenmantel eine Aussparung auf, in die eine Feder 35 eingelassen ist und die mit ihrem anderen Ende gegen den in das tellerförmige Teil 11 des Ankers 10 eingelassenen scheibenförmigen Kopf 16 des Ventilkörpers 15 drückt. Die Feder 35 unterstützt den hydraulischen Druck auf das kugelförmige Ende 28 des Stößels 17 in der Weise, daß das Ventil bei Stromabschaltung schnell öffnet und auch ohne Druck in dieser Lage verbleibt.The guide bushing 21 has a recess on its outer jacket, into which a spring 35 is let in and which at its other end presses against the disk-shaped head 16 of the valve body 15 let into the plate-shaped part 11 of the armature 10. The spring 35 supports the hydraulic pressure on the spherical end 28 of the plunger 17 in such a way that the valve opens quickly when the power is switched off and remains in this position even without pressure.

Oberhalb des Ankers 10 und der kreisringförmigen Platte 7 ist eine Anschlagplatte 36 vorgesehen. Mit Hilfe dieser Anschlagplatte 36 wird der Aufschlag bei Öffnen des Ventils schnell gedämpft. Die Anschlagplatte 36 hat im Bereich des Aufschlages einen erhabenen Ansatz 37, so daß der Anker 10 nur auf einen definierten Flächenbereich auftrifft. Dieser Ansatz 37 liegt dem in den Anker 10 eingepreßten scheibenförmigen Kopf 16 aus hartem antimagnetischem Material gegenüber, so daß auch bei langem Gebrauch des Magnetventils eine Abnützung nur sehr gering ist. In der Anschlagplatte 36 ist eine Nut 38 vorgesehen, die die antimagnetische Anschlagplatte 36 so weit schwächt, daß diese zur Justierung des Systems dort plastisch verformt werden kann.A stop plate 36 is provided above the armature 10 and the annular plate 7. With the help of this stop plate 36, the impact is quickly dampened when the valve is opened. The stop plate 36 has a raised shoulder 37 in the area of the impact, so that the anchor 10 only strikes a defined surface area. This approach 37 is opposed to the disk-shaped head 16 made of hard antimagnetic material, which is pressed into the armature 10, so that wear is only very slight even when the solenoid valve is used for a long time. A groove 38 is provided in the stop plate 36, which weakens the anti-magnetic stop plate 36 to such an extent that it can be plastically deformed there for adjusting the system.

Eine weitere Nut 39 ist in der kreisringförmigen Platte 7 aus magnetischem Material vorgesehen, die an der Stelle in der Weise plastisch verformt werden kann, daß der zweite Luftspalt 14 funktional eingestellt werden kann. Diese Verformung soll nach der Montage der Anschlagplatte 36 möglich sein, so daß zur Aufbringung der Kräfte auf die Oberseite der kreisringförmigen Platte 7 die Anschlagplatte 36 durchbrochen ist.Another groove 39 is provided in the annular plate 7 made of magnetic material, which can be plastically deformed at the point in such a way that the second air gap 14 can be set functionally. This deformation should be possible after assembly of the stop plate 36, so that the stop plate 36 is broken through to apply the forces to the top of the annular plate 7.

Das Magnetventil wird durch eine metallische Deckplatte 40 und durch ein darüber aufgebrachtes elektrisch isolierendes Kunststoffteil 41 abgeschlossen, die in das Ventilgehäuse 1 eingelassen sind. In das Kunststoffteil 41 mit den Steckerführungen 42 sind die Anschlußstifte 43 eingespritzt. Die elektrische Verbindung der Anschlußstifte 43 mit der Spule 3 erfolgt über die Stromzuführungen 44. Diese sind in den Spulenkörper 8 eingespritzt. Die elektrischen Leiterdrähte 45 der Spule 3 werden an ihren Enden um einen Zapfen 46, der Bestandteil des Spulenkörpers 8 ist, geschlungen, um eine Zugentlastung zu gewährleisten. Das Ende des Leiterdrahtes 45 ist an eine nicht dargestellte Fahne der Stromzuführung 44 angeschweißt. Die Stromzuführung 44 ist über eine Abknickung 47 zur Zugentlastung in den elektrisch leitenden Anschlußstift 43 eingeführt.The solenoid valve is closed off by a metallic cover plate 40 and by an electrically insulating plastic part 41 applied above it, which are let into the valve housing 1. The connecting pins 43 are injected into the plastic part 41 with the plug guides 42. The electrical connection of the connecting pins 43 to the coil 3 takes place via the current leads 44. These are injected into the coil body 8. The electrical conductor wires 45 of the coil 3 are wound at their ends around a pin 46, which is part of the coil body 8, in order to ensure strain relief. The end of the conductor wire 45 is welded to a not shown flag of the power supply 44. The power supply 44 is inserted into the electrically conductive connector pin 43 via a bend 47 for strain relief.

Bei Sperrung des Ventils entsteht in dem Zulauf 23 ein hoher Druck, der als Kraft auf den Bereich 31 des antimagnetischen Teils 22 wirkt. Um störende mechanische Verformungen des Außenzylinders 5 und des Innenzylinders 4 durch diese Kraft auszuschließen, ist das antimagnetische Teil 22 im Bereich 48 so kräftig ausgeführt, daß die Kraft auf den Umfang des Außenzylinders 5 geführt werden kann, obwohl dieser so dünn ist, wie es eine in bezug auf Schaltzeiten optimale Magnetauslegung erfordert.When the valve is blocked, a high pressure is created in the inlet 23, which acts as a force on the area 31 of the antimagnetic part 22. In order to exclude disturbing mechanical deformations of the outer cylinder 5 and the inner cylinder 4 by this force, the antimagnetic part 22 in the region 48 is made so strong that the force can be guided onto the circumference of the outer cylinder 5, although it is as thin as it is with regard to switching times, optimal magnet design is required.

Im scheibenförmigen Kopf 16 des Ankers 10 ist eine Bohrung 49 vorgesehen, durch die ebenso wie durch die Druckentlastungsbohrung 33 die beim Füllhub des Stößels 17 verdrängte Flüssigkeit zurückströmen kann.A bore 49 is provided in the disk-shaped head 16 of the armature 10, through which the liquid displaced during the filling stroke of the plunger 17 can flow back, just as through the pressure relief bore 33.

Zur Erleicherung der Paarung der Maßtoleranzen von ringförmiger Platte 7 und Anker 11 sind die Schulter 51 des magnetischen Außenzylinders 5 und der dem ersten Luftspalt 13 zugewandte Pol 52 des magnetischen Innenzylinders 4 in axialer Richtung gleich hoch.To facilitate the pairing of the dimensional tolerances of the annular plate 7 and armature 11, the shoulder 51 of the magnetic outer cylinder 5 and the pole 52 of the magnetic inner cylinder 4 facing the first air gap 13 are of equal height in the axial direction.

Claims (21)

1. Magnetventil, insbesondere Kraftstoffeinspritzventil für Kraftstoffeinspritzanlagen von Brennkraftmaschinen mit einem Ventilgehäuse, einer auf einem Kern aus ferromagnetischem Material aufgebrachten Leiterspule und einem Anker, der einen mit einem Ventilsitz zusammenwirkenden Ventilkörper trägt, dadurch gekennzeichnet, daß der Anker (10) ein tellerförmiges Teil (11) und einen Stutzen (12) aufweist, wobei der Stutzen (12) mit dem Kern (2) einen ersten Luftspalt (13) und der Rand des tellerförmigen Teils (11) mit dem Kern (2) einen zweiten Luftspalt (14) bilden.1. Solenoid valve, in particular fuel injection valve for fuel injection systems of internal combustion engines with a valve housing, a conductor coil applied to a core made of ferromagnetic material and an armature which carries a valve body interacting with a valve seat, characterized in that the armature (10) is a plate-shaped part (11 ) and a nozzle (12), the nozzle (12) with the core (2) forming a first air gap (13) and the edge of the plate-shaped part (11) with the core (2) forming a second air gap (14). 2. Magnetventil nach Anspruch 1, dadurch gekennzeichnet, daß der Kern (2) einen Innen- und Außenzylinder (4, 5) aufweist, die konzentrisch zueinanderliegen und zwischen denen die Leiterspule (3) angeordnet ist, wobei an der einen Stirnfläche der Innenzylinder (4) und der Außenzylinder (5) über ein Joch (6) magnetisch leitend miteinander verbunden sind und die andere Stirnfläche teilweise durch eine kreisringförmige magnetisch leitende Platte (7) abgedeckt ist, die magnetisch leitend mit dem Außenzylinder (5) verbunden ist.2. Solenoid valve according to claim 1, characterized in that the core (2) has an inner and outer cylinder (4, 5) which are concentric with one another and between which the conductor coil (3) is arranged, with the one end face of the inner cylinder (4) and the outer cylinder (5) are connected to one another in a magnetically conductive manner via a yoke (6) and the other end face is partially connected by a circle annular magnetically conductive plate (7) is covered, which is magnetically connected to the outer cylinder (5). 3. Magnetventil nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß der Stutzen (12) des Ankers (10) dem Innenzylinder (4) gegenüberliegt und zwischen ihnen der erste Luftspalt (13) angeordnet ist und daß der Rand des tellerförmigen Teils (11) des Ankers (10) der kreisringförmigen Platte (7) gegenüberliegt und zwischen ihnen der zweite Luftspalt (14) angeordnet ist.3. Solenoid valve according to claim 1 or claim 2, characterized in that the connecting piece (12) of the armature (10) opposite the inner cylinder (4) and between them the first air gap (13) is arranged and that the edge of the plate-shaped part (11th ) of the armature (10) opposite the annular plate (7) and between them the second air gap (14) is arranged. 4. Magnetventil nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Innzylinder (4), die kreisringförmige Platte (7) und der Anker (10) aus einem Material mit hoher magnetischer Sättigungsinduktion bestehen.4. Solenoid valve according to claim 2 or 3, characterized in that the inner cylinder (4), the annular plate (7) and the armature (10) consist of a material with high magnetic saturation induction. 5. Magnetventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Ventilkörper (15) aus antimagnetischem Material einen Stößel (17) und einen scheibenförmigen Kopf (16) aufweist, der im Bereich des tellerförmigen Teils (11) mit dem Anker (10) verbunden ist, wobei der Stößel (17) in der Zylinderbohrung (20) einer Führungsbuchse (21) geführt ist.5. Solenoid valve according to one of claims 1 to 4, characterized in that the valve body (15) made of antimagnetic material has a plunger (17) and a disc-shaped head (16) which in the region of the plate-shaped part (11) with the armature ( 10) is connected, the plunger (17) being guided in the cylinder bore (20) of a guide bush (21). 6. Magnetventil nach Anspruch 5, dadurch gekennzeichnet, daß der scheibenförmige Kopf (16) in das tellerförmige Teil (11) des Ankers (10) eingepreßt und/oder eingeschweißt ist.6. Solenoid valve according to claim 5, characterized in that the disc-shaped head (16) in the plate-shaped part (11) of the armature (10) is pressed and / or welded. 7. Magnetventil nach Anspruch 5 oder Anspruch 6, dadurch gekennzeichnet, daß in der Führungsbuchse (21) eine Aussparung zur Aufnahme einer Feder (35) vorgesehen ist, die gegen den Anker (10) drückt und die den Anker (10) ohne Stromzufuhr zur Leiterspule (3) in der Weise hält, daß der Ventilkörper (15) vom Ventilsitz (29) abgehoben ist.7. Solenoid valve according to claim 5 or claim 6, characterized in that in the guide bushing (21) a recess for receiving a spring (35) is provided which presses against the armature (10) and which the armature (10) without power supply Conductor coil (3) holds in such a way that the valve body (15) is lifted off the valve seat (29). 8. Magnetventil nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Führungsbuchse (21) und die Feder (35) innerhalb des Innenzylinders (4) des Kerns (2) angeordnet sind.8. Solenoid valve according to one of claims 5 to 7, characterized in that the guide bush (21) and the spring (35) are arranged within the inner cylinder (4) of the core (2). 9. Magnetventil nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß der Stößel (17) zwei Lagerstellen (18, 19) aufweist, durch die er in der Zylinderbohrung (20) der Führungsbuchse (21) geführt wird, wobei eine Lagerstelle (18) in unmittelbarer Nähe des ersten Luftspalts (13) liegt.9. Solenoid valve according to one of claims 5 to 8, characterized in that the plunger (17) has two bearing points (18, 19) through which it is guided in the cylinder bore (20) of the guide bushing (21), one bearing point ( 18) is in the immediate vicinity of the first air gap (13). 10. Magnetventil nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß oberhalb des Ankers (10) eine Anschlagplatte (36) aus hartem antimagnetischem Material vorgesehen ist, auf die der Anker (10) auftrifft.10. Solenoid valve according to one of claims 1 to 9, characterized in that a stop plate (36) made of hard antimagnetic material is provided above the armature (10) on which the anchor (10) strikes. 11. Magnetventil nach Anspruch 10, dadurch gekennzeichnet, daß der Anker (10) im Bereich des scheibenförmigen Kopfes (16) auf die Anschlagplatte (36) auftrifft.11. Solenoid valve according to claim 10, characterized in that the armature (10) in the region of the disc-shaped head (16) strikes the stop plate (36). 12. Magnetventil nach Anspruch 10 oder Anspruch 11, dadurch gekennzeichnet, daß die Anschlagplatte (36) eine ringförmige Nut (38) aufweist.12. Solenoid valve according to claim 10 or claim 11, characterized in that the stop plate (36) has an annular groove (38). 13. Magnetventil nach einem der Ansprüche 2 bis 12, dadurch gekennzeichnet, daß die kreisringförmige Platte (7) eine ringförmigen Nut (39) aufweist.13. Solenoid valve according to one of claims 2 to 12, characterized in that the annular plate (7) has an annular groove (39). 14. Magnetventil nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß die Masse der Anschlagplatte (36) viel größer als die Masse des Ankers (10) mit Ventilkörper (15) ist.14. Solenoid valve according to one of claims 10 to 13, characterized in that the mass of the stop plate (36) is much larger than the mass of the armature (10) with valve body (15). 15. Magnetventil nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, daß ein Teil des Bereiches der Anschlagplatte (36), in dem der Anker (10) auftrifft, erhaben ausgebildet ist.15. Solenoid valve according to one of claims 10 to 14, characterized in that a part of the region of the stop plate (36) in which the armature (10) strikes is raised. 16. Magnetventil nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, daß die Anschlagplatte (36) durchbrochen ist.16. Solenoid valve according to one of claims 10 to 15, characterized in that the stop plate (36) is broken. 17. Magnetventil nach einem der Ansprüche 5 bis 16, dadurch gekennzeichnet, daß die Führungsbuchse (21) in das Gehäuseteil (22) übergeht, das den Ventilsitz (29) und die hydraulischen Zu- und Abflüsse (23, 24) aufweist. 17th Solenoid valve according to one of claims 5 to 16, characterized in that the guide bush (21) merges into the housing part (22) which has the valve seat (29) and the hydraulic inflows and outflows (23, 24). 18. Magnetventil nach einem der Ansprüche 2 bis 17, dadurch gekennzeichnet, daß der Spulenraum (34) zwischen Innen- und Außenzylinder, Joch (6) und kreisringförmiger Platte (7) einen etwa quadratischen Querschnitt aufweist. 1 8. Solenoid valve according to one of claims 2 to 17, characterized in that the coil space (34) between the inner and outer cylinder, yoke (6) and annular plate (7) has an approximately square cross section. 19. Magnetventil nach einem im Ansprüche 1 bis 18, dadurch gekennzeichnet, daß eine Bohrung (50) vorgesehen ist, durch die die Flüssigkeit in den Spulenraum (34) gelangt.19. Solenoid valve according to one of claims 1 to 18, characterized in that a bore (50) is provided through which the liquid enters the coil space (34). 20. Magnetventil nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, daß der Ventilsitz (29) und Zylinderbohrung (20) der Führungsbuchse (21) in einer Aufspannung bearbeitet werden.20. Solenoid valve according to one of claims 1 to 19, characterized in that the valve seat (29) and cylinder bore (20) of the guide bush (21) are machined in one setting. 21. Magnetventil nach Anspruch 20, dadurch gekennzeichnet, daß die Schulter (51) des Außenzylinders (5) und der dem erste Luftspalt (13) zugewandte Pol (52) des Innenzylinders (4) in derselben Aufspannung in axialer Richtung gleich hoch bearbeitet werden.21. Solenoid valve according to claim 20, characterized in that the shoulder (51) of the outer cylinder (5) and the first air gap (13) facing pole (52) of the inner cylinder (4) are machined to the same height in the same setting in the axial direction.
EP82108989A 1981-10-06 1982-09-29 Electromagnetic valve, in particulier fuel injection valve Expired EP0076459B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813139669 DE3139669A1 (en) 1981-10-06 1981-10-06 SOLENOID VALVE, ESPECIALLY FUEL INJECTION VALVE
DE3139669 1981-10-06

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EP0076459A1 true EP0076459A1 (en) 1983-04-13
EP0076459B1 EP0076459B1 (en) 1986-02-19

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US (1) US4475690A (en)
EP (1) EP0076459B1 (en)
JP (1) JPS5872782A (en)
DE (2) DE3139669A1 (en)

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EP0178427A2 (en) * 1984-09-14 1986-04-23 Robert Bosch Gmbh Electrically controlled fuel injection pump for internal combustion engines
FR2574129A1 (en) * 1984-11-30 1986-06-06 Lucas Ind Plc ELECTROMAGNETIC VALVE FOR FUEL INJECTION SYSTEM
EP0200373A2 (en) * 1985-04-01 1986-11-05 Nippondenso Co., Ltd. High-pressure fluid control solenoid valve assembly with coaxially arranged two valves
FR2594493A1 (en) * 1986-02-19 1987-08-21 Weber Srl ELECTROMAGNETIC VALVE FOR DOSING AND ATOMIZING A FUEL FOR A SUPPLY DEVICE FOR AN INTERNAL COMBUSTION ENGINE
GB2245764A (en) * 1990-06-29 1992-01-08 Weber Srl Solenoid operated fuel injection valves
WO2000017551A1 (en) * 1998-09-24 2000-03-30 Robert Bosch Gmbh Electromagnetically actuatable hydraulic proportional valve
FR2820800A1 (en) * 2001-02-14 2002-08-16 Bosch Gmbh Robert PRESSURE CONTROL VALVE FOR A DIRECT INJECTION FUEL DELIVERY SYSTEM OF AN INTERNAL COMBUSTION ENGINE

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DE3523536A1 (en) * 1984-09-14 1986-03-27 Robert Bosch Gmbh, 7000 Stuttgart Electrically controlled fuel injection pump for internal combustion engines
DE3442750A1 (en) * 1984-11-23 1986-05-28 Robert Bosch Gmbh, 7000 Stuttgart SOLENOID VALVE FOR FLUID CONTROL
DE3500449A1 (en) * 1985-01-09 1986-07-10 Robert Bosch Gmbh, 7000 Stuttgart SOLENOID VALVE FOR FLUID CONTROL
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EP0178427A2 (en) * 1984-09-14 1986-04-23 Robert Bosch Gmbh Electrically controlled fuel injection pump for internal combustion engines
EP0178427A3 (en) * 1984-09-14 1987-12-09 Robert Bosch Gmbh Electrically controlled fuel injection pump for internalelectrically controlled fuel injection pump for internal combustion engines combustion engines
FR2574129A1 (en) * 1984-11-30 1986-06-06 Lucas Ind Plc ELECTROMAGNETIC VALVE FOR FUEL INJECTION SYSTEM
EP0200373A2 (en) * 1985-04-01 1986-11-05 Nippondenso Co., Ltd. High-pressure fluid control solenoid valve assembly with coaxially arranged two valves
EP0200373A3 (en) * 1985-04-01 1987-12-09 Nippondenso Co., Ltd. High-pressure fluid control solenoid valve assembly withhigh-pressure fluid control solenoid valve assembly with coaxially arranged two valves coaxially arranged two valves
US4753212A (en) * 1985-04-01 1988-06-28 Nippondenso Co., Ltd. High-pressure fluid control solenoid valve assembly with coaxially arranged two valves
FR2594493A1 (en) * 1986-02-19 1987-08-21 Weber Srl ELECTROMAGNETIC VALVE FOR DOSING AND ATOMIZING A FUEL FOR A SUPPLY DEVICE FOR AN INTERNAL COMBUSTION ENGINE
GB2245764A (en) * 1990-06-29 1992-01-08 Weber Srl Solenoid operated fuel injection valves
WO2000017551A1 (en) * 1998-09-24 2000-03-30 Robert Bosch Gmbh Electromagnetically actuatable hydraulic proportional valve
FR2820800A1 (en) * 2001-02-14 2002-08-16 Bosch Gmbh Robert PRESSURE CONTROL VALVE FOR A DIRECT INJECTION FUEL DELIVERY SYSTEM OF AN INTERNAL COMBUSTION ENGINE

Also Published As

Publication number Publication date
DE3269204D1 (en) 1986-03-27
US4475690A (en) 1984-10-09
JPS5872782A (en) 1983-04-30
JPH0345267B2 (en) 1991-07-10
DE3139669A1 (en) 1983-04-21
EP0076459B1 (en) 1986-02-19

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