EP0200866A1 - Injection valve - Google Patents

Injection valve Download PDF

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Publication number
EP0200866A1
EP0200866A1 EP86102636A EP86102636A EP0200866A1 EP 0200866 A1 EP0200866 A1 EP 0200866A1 EP 86102636 A EP86102636 A EP 86102636A EP 86102636 A EP86102636 A EP 86102636A EP 0200866 A1 EP0200866 A1 EP 0200866A1
Authority
EP
European Patent Office
Prior art keywords
valve seat
valve
spring
flat armature
closing member
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
EP86102636A
Other languages
German (de)
French (fr)
Other versions
EP0200866B1 (en
Inventor
Eckhart Kern
Reiner Weingärtner
Jürgen Luft
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6270003&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0200866(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to AT86102636T priority Critical patent/ATE36189T1/en
Publication of EP0200866A1 publication Critical patent/EP0200866A1/en
Application granted granted Critical
Publication of EP0200866B1 publication Critical patent/EP0200866B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M51/0646—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 a short body, e.g. sphere or cube
    • F02M51/065—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 a short body, e.g. sphere or cube the valve being spherical or partly spherical
    • 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 relates to an injection valve, in particular for fuel injection systems of internal combustion engines with a magnet winding, a magnet core, a flat armature connected to a closing element, a valve seat and a spring which presses the closing element against the valve seat.
  • the object of the present invention is to avoid the disadvantages of the known injection valves.
  • the spring force acts on a level within the closing member, which does not differ significantly from the level of the valve seat in the direction of the flat armature.
  • the invention prevents pivoting of the closing member from its position coaxial with the valve seat during the opening and closing movements due to the center of gravity of the closing member, which is far from the valve seat.
  • the support plane of the spring lies further than the plane of the valve seat from the armature.
  • a housing 1 shows the parts of a known injection valve that are necessary to explain the invention.
  • a body 3 carrying the valve seat 2 with a processing bore 4 into which the fuel passes through the bores 5.
  • the closing member 6 of the valve is spherical section-shaped and lies with a circular line on the valve seat. For this purpose, it is pressed against the valve seat by a spring 7.
  • the spring 7 is mounted in a part 8 facing away from the closing member.
  • the coil 9, which is in a Spu Long 10 is located, supplied with electrical current.
  • the resulting magnetic field is guided by a magnetic core 11 designed as a shell core and an intermediate ring 15 and causes the flat armature 12 to be tightened in a manner known per se. This opens the valve so that the fuel can flow out through the bore 5.
  • a membrane 13 is provided for centering the flat armature 12 and the closing member 6. The membrane is clamped at its outer edge between the housing 1 and an annular spacer 14.
  • the support plane for the spring 7 is shifted further downward than the known injection valve.
  • the spring exerts a stabilizing effect with regard to possible pivoting of the closing member 6 due to vibrations.
  • the injection valve according to the invention can be constructed similarly to the known injection valves.
  • the shifting of the support level downwards can be done by constructive Conditions - for example limits with regard to the wall thickness of the closing element, with regard to the spring force and the associated diameter of the spring - limits are set. Depending on the other circumstances, it can already contribute to the solution of the task according to the invention if the support plane lies approximately in the plane of the valve seat.

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)
  • Magnetically Actuated Valves (AREA)

Abstract

1. Electromagnetically operable fuel injection valve for internal-combustion engines, having a magnet winding, a magnet core and a flat armature (12), which with the magnet core forms a magnetic circuit, an annular valve seat (2), a valve element (6), which is connected to the flat armature (12), provides a three-dimensional seal and is pressed by a spring (7), whose diameter is smaller than the diameter of the valve seat (2), in the dead state of the magnet winding (9) with sealing effect against the valve seat (2) and thereby penetrates the plane defined by the valve seat (2), characterized in that the spring (7) acts on a plane of the valve element (6) whose distance from the flat armature (12) is greater than the distance of the plane defined by the valve seat (2) from the flat armature (12).

Description

Die Erfindung bezieht sich auf ein Einspritzventil, insbesondere für Kraftstoff-Einspritzanlagen von Brennkraftmaschinen mit einer Magnetwicklung, einem Magnetkern, einem mit einem Schließglied verbundenem Flachanker, einem Ventilsitz und einer Feder, welche das Schließglied gegen den Ventilsitz drückt.The invention relates to an injection valve, in particular for fuel injection systems of internal combustion engines with a magnet winding, a magnet core, a flat armature connected to a closing element, a valve seat and a spring which presses the closing element against the valve seat.

Bei derartigen bekannten Einspritzventilen wird zwar der Flachanker und das Schließglied sowohl in axialer als auch in radialer Richtung durch eine Membran zentriert, es kann jedoch bei den bekannten Ventilen vorkommen, daß das Schließglied nicht einwandfrei auf dem Ventilsitz zu liegen kommt.In such known injection valves, although the flat armature and the closing member are centered in the axial as well as in the radial direction by a membrane, it can happen with the known valves that the closing member does not come to rest properly on the valve seat.

Aufgabe der vorliegenden Erfindung ist es, die Nachteile der bekannten Einspritzventile zu vermeiden.The object of the present invention is to avoid the disadvantages of the known injection valves.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Federkraft auf eine Ebene innerhalb des Schließgliedes wirkt, welche nicht wesentlich von der Ebene des Ventilsitzes in Richtung auf den Flachanker abweicht. Durch die Erfindung wird ein Verschwenken des Schließglieds aus seiner zum Ventilsitz koaxialen Lage während der Öffnungs- und Schließbewegungen aufgrund des weit vom Ventilsitz entfernten Massenschwerpunkts des Schließglieds vermieden. Gemäß einer Weiterbildung der Erfindung liegt die Abstützebene der Feder weiter als die Ebene des Ventilsitzes vom Anker entfernt.This object is achieved in that the spring force acts on a level within the closing member, which does not differ significantly from the level of the valve seat in the direction of the flat armature. The invention prevents pivoting of the closing member from its position coaxial with the valve seat during the opening and closing movements due to the center of gravity of the closing member, which is far from the valve seat. According to a development of the invention, the support plane of the spring lies further than the plane of the valve seat from the armature.

Die Erfindung läßt zahlreiche Ausführungsformen zu. Eine davon ist schematisch in Figuren dargestellt und nachfolgend beschrieben. Es zeigt:

  • Fig. 1 Teile eines bekannten Einspritzventils und
  • Fig. 2 Teile eines erfindungsgemäßen Einspritzventils.
The invention allows numerous embodiments. One of them is shown schematically in figures and described below. It shows:
  • Fig. 1 parts of a known injector and
  • Fig. 2 parts of an injection valve according to the invention.

Gleiche Teile sind in den Figuren mit gleichen Bezugszeichen versehen.Identical parts are provided with the same reference symbols in the figures.

In Fig. 1 sind die zur Erläuterung der Erfindung notwendigen Teile eines bekannten Einspritzventils dargestellt. In einem Gehäuse 1 findet sich ein den Ventilsitz 2 tragender Körper 3 mit einer Aufbereitungsbohrung 4, in welche der Kraftstoff über die Bohrungen 5 gelangt.1 shows the parts of a known injection valve that are necessary to explain the invention. In a housing 1 there is a body 3 carrying the valve seat 2 with a processing bore 4 into which the fuel passes through the bores 5.

Das Schließglied 6 des Ventils ist kugelabschnittförmig und liegt mit einer Kreislinie am Ventilsitz auf. Dazu wird es von einer Feder 7 gegen den Ventilsitz gedrückt. Die Feder 7 ist in einem vom Schließglied abgewandten Teil 8 gelagert. Zum Öffnen des Ventils wird die Spule 9, welche sich in einem Spulenträger 10 befindet, mit elektrischem Strom beaufschlagt. Das sich dadurch aufbauende magnetische Feld wird von einem als Schalenkern ausgebildeten Magnetkern 11 und einem Zwischenring 15 geleitet und bewirkt in an sich bekannter Weise ein Anziehen des Flachankers 12. Dadurch wird das Ventil geöffnet, so daß der Kraftstoff über die Bohrung 5 ausströmen kann.The closing member 6 of the valve is spherical section-shaped and lies with a circular line on the valve seat. For this purpose, it is pressed against the valve seat by a spring 7. The spring 7 is mounted in a part 8 facing away from the closing member. To open the valve, the coil 9, which is in a Spu Lträger 10 is located, supplied with electrical current. The resulting magnetic field is guided by a magnetic core 11 designed as a shell core and an intermediate ring 15 and causes the flat armature 12 to be tightened in a manner known per se. This opens the valve so that the fuel can flow out through the bore 5.

Zur Zentrierung des Flachankers 12 und des Schließgliedes 6 ist eine Membran 13 vorgesehen. Die Membran ist an ihrem äußeren Rand zwischen das Gehäuse 1 und ein ringförmiges Abstandselement 14 eingespannt.A membrane 13 is provided for centering the flat armature 12 and the closing member 6. The membrane is clamped at its outer edge between the housing 1 and an annular spacer 14.

Da der Masseschwerpunkt des aus dem Anker 12 und dem Schließglied 6 bestehenden Teils nicht mit dem Mittelpunkt des kugelabschnittförmigen Schließgliedes übereinstimmt, kommt es bei starken Erschütterungen zu einer Verdrehung des Schließgliedes und des Ankers 12. Dieses kann bei Abweichungen von der Rundheit des Schließgliedes 6 - beispielsweise infolge von Abnutzungen - zu einer mangelnden Dichtheit des Ventils führen.Since the center of gravity of the part consisting of the armature 12 and the closing element 6 does not correspond to the center point of the spherical segment-shaped closing element, the closing element and the armature 12 are twisted in the event of strong vibrations as a result of wear and tear - lead to poor valve tightness.

Bei dem erfindungsgemäßen Ventil wird nun, wie in Fig. 2 dargestellt, gegenüber dem bekannten Einspritzventil die Abstützebene für die Feder 7 weiter nach unten verlagert. Dadurch übt die Feder eine stabilisierende Wirkung bezüglich möglicher durch Erschütterungen bedingter Verschwenkungen des Schließgliedes 6 aus. Im übrigen kann das erfindungsgemäße Einspritzventil ähnlich wie die bekannten Einspritzventile aufgebaut sein. Der Verlagerung der Abstützebene nach unten können durch konstruktive Gegebenheiten - beispielsweise Grenzen bezüglich der Wandstärke des Schließelements, bezüglich der Federkraft und des damit verbundenen Durchmessers der Feder - Grenzen gesetzt sein. Je nach vorliegenden weiteren Gegebenheiten kann es bereits zur Lösung der erfindungsgemäßen Aufgabe beitragen, wenn die Abstützebene etwa in der Ebene des Ventilsitzes liegt.In the valve according to the invention, as is shown in FIG. 2, the support plane for the spring 7 is shifted further downward than the known injection valve. As a result, the spring exerts a stabilizing effect with regard to possible pivoting of the closing member 6 due to vibrations. Otherwise, the injection valve according to the invention can be constructed similarly to the known injection valves. The shifting of the support level downwards can be done by constructive Conditions - for example limits with regard to the wall thickness of the closing element, with regard to the spring force and the associated diameter of the spring - limits are set. Depending on the other circumstances, it can already contribute to the solution of the task according to the invention if the support plane lies approximately in the plane of the valve seat.

Claims (2)

1. Einspritzventil, insbesondere für Kraftstoff-Einspritzanlagen von Brennkraftmaschinen mit einer Magnetwicklung, einem Magnetkern, einem mit einem Schließglied verbundenem Flachanker, einem Ventilsitz und einer Feder, welche das Schließglied gegen den Ventilsitz drückt, dadurch gekennzeichnet, daß die Federkraft auf eine Ebene innerhalb des Schließgliedes (6) wirkt, welche nicht wesentlich von der Ebene des Ventilsitzes (2) in Richtung auf den Flachanker (12) abweicht.1.Injection valve, in particular for fuel injection systems of internal combustion engines with a magnetic winding, a magnetic core, a flat armature connected to a closing member, a valve seat and a spring which presses the closing member against the valve seat, characterized in that the spring force to a level within the Closing member (6) acts, which does not deviate significantly from the level of the valve seat (2) in the direction of the flat armature (12). 2. Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Ebene, auf die die Feder (7) wirkt, weiter vom Anker (12) entfernt ist als die Ebene des Ventilsitzes.2. Injector according to claim 1, characterized in that the plane on which the spring (7) acts is further from the armature (12) than the plane of the valve seat.
EP86102636A 1985-05-07 1986-02-28 Injection valve Expired EP0200866B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86102636T ATE36189T1 (en) 1985-05-07 1986-02-28 INJECTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853516323 DE3516323A1 (en) 1985-05-07 1985-05-07 INJECTION VALVE
DE3516323 1985-05-07

Publications (2)

Publication Number Publication Date
EP0200866A1 true EP0200866A1 (en) 1986-11-12
EP0200866B1 EP0200866B1 (en) 1988-08-03

Family

ID=6270003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102636A Expired EP0200866B1 (en) 1985-05-07 1986-02-28 Injection valve

Country Status (4)

Country Link
EP (1) EP0200866B1 (en)
JP (1) JPS61255266A (en)
AT (1) ATE36189T1 (en)
DE (2) DE3516323A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033907A1 (en) * 2001-10-13 2003-04-24 Robert Bosch Gmbh Fuel-injection valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4108758C2 (en) * 1991-03-18 2000-05-31 Deutz Ag Solenoid valve for a fuel injector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2094946A (en) * 1981-05-13 1982-09-22 Bosch Gmbh Robert Electromagnetically actuable valve
JPS5862358A (en) 1981-10-09 1983-04-13 Nippon Denso Co Ltd Electro-magnetic fuel injection valve
DE3207918A1 (en) * 1982-03-05 1983-09-15 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE VALVE
EP0094702A1 (en) 1982-05-19 1983-11-23 Qualitrol Corporation Pressure relief device
EP0102723A1 (en) * 1982-07-29 1984-03-14 LUCAS INDUSTRIES public limited company Plate type fuel injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2094946A (en) * 1981-05-13 1982-09-22 Bosch Gmbh Robert Electromagnetically actuable valve
JPS5862358A (en) 1981-10-09 1983-04-13 Nippon Denso Co Ltd Electro-magnetic fuel injection valve
DE3207918A1 (en) * 1982-03-05 1983-09-15 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE VALVE
EP0094702A1 (en) 1982-05-19 1983-11-23 Qualitrol Corporation Pressure relief device
EP0102723A1 (en) * 1982-07-29 1984-03-14 LUCAS INDUSTRIES public limited company Plate type fuel injector

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 7, Nr. 153 (M-226) [1298], 5. Juli 1983; & JP - A - 58 62 358 (NIPPON DENSO K.K.) 13-04-1983 *
PATENTS ABSTRACTS OF JAPAN,Band 9, Nr. 297 (M-432) [2020], 25. November 1985; & JP - A - 60 135 660 (JIDOSHA KOGAI ANZEN KIKI GIJUTSU KENKYU KUMIAI) 19-07-1985 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033907A1 (en) * 2001-10-13 2003-04-24 Robert Bosch Gmbh Fuel-injection valve

Also Published As

Publication number Publication date
DE3516323A1 (en) 1986-11-13
EP0200866B1 (en) 1988-08-03
ATE36189T1 (en) 1988-08-15
JPS61255266A (en) 1986-11-12
DE3660457D1 (en) 1988-09-08

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