EP1120549B1 - Engine valve drive with electromagnetic actuators comprising pneumatic return springs - Google Patents

Engine valve drive with electromagnetic actuators comprising pneumatic return springs Download PDF

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Publication number
EP1120549B1
EP1120549B1 EP00126374A EP00126374A EP1120549B1 EP 1120549 B1 EP1120549 B1 EP 1120549B1 EP 00126374 A EP00126374 A EP 00126374A EP 00126374 A EP00126374 A EP 00126374A EP 1120549 B1 EP1120549 B1 EP 1120549B1
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EP
European Patent Office
Prior art keywords
magnet
armature
piston
gas
pneumatic springs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00126374A
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German (de)
French (fr)
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EP1120549A2 (en
EP1120549A3 (en
Inventor
Hans-Jörg Steffens
Frank Meissner
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means

Definitions

  • the invention relates according to the preamble of claim 1 to a Valve control for internal combustion engines equipped with a gas spring Electromagnetic actuator, in which one with a gas exchange valve in drive connection standing armature between a closing magnet and an opening magnet is arranged to oscillate against restoring forces of the gas springs, wherein the separated by means of the armature gas springs from a rechargeable Memory a gas metered via controllable valves and from the gas springs via controllable drain valves gas is drained.
  • Such a valve control is known for example from US 5,611,303, the interaction of the metering valves and the discharge valves of the gas springs designed with regard to a stroke-adjustable actuator.
  • the Gas spring formed essentially by a piston-like tube, the on Half length is divided over an anchor section.
  • the invention is based on the object, the generic valve control simple structure so that variable spring characteristics in conjunction achieved with a controlled stop damping, wherein the stop damping additionally or independently of the drain valves can be influenced.
  • each chamber a pressure-controlled against a return spring slidable piston comprises, over its degree of displacement a corresponding compression pressure between Separating piston or armature and the respective end face of the closing magnet and the Opening magnet is effected.
  • both the spring stiffness and advantageously also the impact damping are influenced, for example, at relatively soft spring characteristic and fast acting piston achieves a high damping is.
  • a gas displacement is effected for Separating one in the closed position of the gas exchange valve by means of a permanent magnet on the front side of the closing magnet held separating piston or Ankers, the pressure-controlled in the closed position when stopping the engine is arranged.
  • volume-variable chamber according to the invention can thus with appropriate control of the piston as a breakaway device held on the closing magnet Serve anchor.
  • the invention is based on an embodiment schematically illustrated in the drawing described.
  • a valve control 1 for unillustrated internal combustion engines comprises a electro-magnetic actuator 2 with gas springs 3 and 4, one with a gas exchange valve 5 in drive connection armature 6 between a closing magnet 7 and an opening magnet 8 against restoring forces of the gas springs. 3 and 4 is arranged oscillating.
  • the gas springs 3 and 4 is made of a rechargeable Memory 9 by means of lines 9 ', 9 "a gas metered via controllable valves 10, wherein from the gas springs 3 and 4 via controllable discharge valves 11 gas is drained.
  • the invention proposes that the armature 6 as a slidably disposed in a cylinder 12 of the actuator 2 tightly Separating piston 13 is formed between two gas springs 3 and 4, and that the metering valves 10 and the drain valves 11 as a function of Load ranges of the internal combustion engine controlled the setting of adapted spring characteristics serve, wherein the respective gas spring 3, 4 beyond the limiting End face 7 'and 8' of the closing magnet 7 and the opening magnet 8 with a controlled / regulated volume variable chamber 14 in each magnet 7, 8 in Connection stands.
  • each chamber 14 includes a pressure controlled against a return spring 15 displaceable piston 16, via whose Dimension of the displacement a corresponding compression end pressure between separating piston 13 and armature 12 and the respective end face 7 'and 8' of the closing magnet 7 and the opening magnet 8 is effected.
  • the chambers 14 can each be controlled separately or jointly be, which, for example, with separate control of the chambers 14 in the Gas springs 3 and 4 different spring characteristics are to be realized.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Magnetically Actuated Valves (AREA)

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf eine Ventilsteuerung für Brennkraftmaschinen mit einem mit Gasfedem ausgerüsteten elektro-magnetischen Aktor, bei dem ein mit einem Gaswechselventil in Antriebsverbindung stehender Anker zwischen einem Schließmagneten und einem Öffnungsmagneten gegen Rückstellkräfte der Gasfedern oszillierend angeordnet ist, wobei den mittels des Ankers voneinander getrennten Gasfedern aus einem aufladbaren Speicher ein Gas über ansteuerbare Ventile zugemessen und aus den Gasfedern über ansteuerbare Ablass-Ventile Gas abgelassen ist.The invention relates according to the preamble of claim 1 to a Valve control for internal combustion engines equipped with a gas spring Electromagnetic actuator, in which one with a gas exchange valve in drive connection standing armature between a closing magnet and an opening magnet is arranged to oscillate against restoring forces of the gas springs, wherein the separated by means of the armature gas springs from a rechargeable Memory a gas metered via controllable valves and from the gas springs via controllable drain valves gas is drained.

Eine derartige Ventilsteuerung ist beispielsweise aus der US 5,611,303 bekannt, wobei das Zusammenspiel der Zumess-Ventile und der Ablass-Ventile der Gasfedern im Hinblick auf einen hubverstellbaren Aktor gestaltet ist. Weiter sind die Gasfedem im wesentlichen durch ein kolbenartig geführtes Rohr gebildet, das auf halber Länge über einen Ankerabschnitt unterteilt ist.Such a valve control is known for example from US 5,611,303, the interaction of the metering valves and the discharge valves of the gas springs designed with regard to a stroke-adjustable actuator. Next are the Gas spring formed essentially by a piston-like tube, the on Half length is divided over an anchor section.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Ventilsteuerung bei einfachem Aufbau so weiterzubilden, dass variable Federkennlinien in Verbindung mit einer gesteuerten Anschlagdämpfung erzielt sind, wobei die Anschlagdämpfung zusätzlich bzw. unabhängig von den Ablass-Ventilen beeinflussbar ist.The invention is based on the object, the generic valve control simple structure so that variable spring characteristics in conjunction achieved with a controlled stop damping, wherein the stop damping additionally or independently of the drain valves can be influenced.

Diese Aufgabe ist mit dem Patenanspruch 1 dadurch gelöst, dass der Anker als ein in einem Zylinder des Aktors gleitbeweglich dicht angeordneter Trennkolben zwischen beiden Gasfedern ausgebildet ist, und dass die Zumess-Ventile und die Ablass-Ventile in Abhängigkeit von Lastbereichen der Brennkraftmaschine gesteuert der Einstellung angepasster Federkennlinien dienen, wobei die jeweilige Gasfeder jenseits der begrenzenden Stirnseite des Schließmagneten bzw. des Öffnungsmagneten mit einer gesteuert/geregelt volumenvariablen Kammer im jeweiligen Magneten in Verbindung steht.This object is achieved with the patent claim 1, characterized in that the anchor as a in a cylinder of the actuator slidably arranged sealing piston between two gas springs is formed, and that the metering valves and the drain valves controlled as a function of load ranges of the internal combustion engine the setting adjusted spring characteristics are used, with the respective gas spring beyond the limiting end face of the closing magnet or of the opening magnet with a controlled / regulated volume variable chamber in each Magnet communicates.

Mit der erfindungsgemäßen Kombination ist in vorteilhafter Weise erreicht, dass mit den volumenvariablen Kammern sowohl die Federkennlinie als auch die Anschlag-Dämpfung sowohl jeweils für sich als auch in gegenseitiger Abhängigkeit beeinflussbar sind, wobei mit den volumenvariablen Kammern gegenüber den gesteuerten Ablass-Ventilen gesonderte bzw. unabhängig ansteuerbare Dämpfungsmittel aufgezeigt sind.With the combination according to the invention is achieved in an advantageous manner that with the volume variable chambers both the spring characteristic and the stop damping both individually and interdependently influenced are, with the volume variable chambers over the controlled Discharge valves separate or independently controllable damping means are shown.

In Ausgestaltung der Erfindung wird daher vorgeschlagen, dass jede Kammer einen druckgesteuert gegen eine Rückstellfeder verschiebbaren Kolben umfasst, über dessen Maß der Verschiebung ein entsprechender Verdichtungsdruck zwischen Trennkolben bzw. Anker und der jeweiligen Stirnseite des Schließmagneten und des Öffnungsmagneten bewirkt ist.In an embodiment of the invention is therefore proposed that each chamber a pressure-controlled against a return spring slidable piston comprises, over its degree of displacement a corresponding compression pressure between Separating piston or armature and the respective end face of the closing magnet and the Opening magnet is effected.

Mit dieser Ausgestaltung kann in vorteilhafter Weise sowohl die Federsteifigkeit als auch die Anschlagdämpfung beeinflusst werden, wobei beispielsweise bei relativ weicher Federkennlinie und schnell wirksamen Kolben eine hohe Dämpfung erzielbar ist.With this configuration, both the spring stiffness and advantageously also the impact damping are influenced, for example, at relatively soft spring characteristic and fast acting piston achieves a high damping is.

In weiterer Ausgestaltung der Erfindung wird schließlich vorgeschlagen, dass über die Kammer im Schließmagneten mittels eines druckgesteuert beschleunigten Kolbens beim Start der Brennkraftmaschine eine Gasverdrängung bewirkt ist zum Trennen eines in Schließstellung des Gaswechselventils mittels eines Dauermagneten an der Stirnseite des Schließmagneten gehaltenen Trennkolbens bzw. Ankers, der beim Abstellen der Brennkraftmaschine druckgesteuert in der Schließstellung angeordnet ist.In a further embodiment of the invention is finally proposed that over the chamber in the closing magnet by means of a pressure-controlled accelerated piston at the start of the engine, a gas displacement is effected for Separating one in the closed position of the gas exchange valve by means of a permanent magnet on the front side of the closing magnet held separating piston or Ankers, the pressure-controlled in the closed position when stopping the engine is arranged.

Die erfindungsgemäße volumenvariable Kammer kann also bei entsprechender Ansteuerung des Kolbens als Losbrech-Einrichtung für den am Schließmagneten gehaltenen Anker dienen.The volume-variable chamber according to the invention can thus with appropriate control of the piston as a breakaway device held on the closing magnet Serve anchor.

Schließlich bezieht sich ein weiterer Vorschlag darauf, dass die Kammern jeweils gesondert oder gemeinsam angesteuert sind, wobei beispielsweise mit der gesonderten Ansteuerung der Kammern für jede der Gasfedem eine andere Federkennlinie zu verwirklichen ist.Finally, another proposal refers to the chambers each are controlled separately or jointly, for example, with the separate Control of the chambers for each of the gas springs another spring characteristic is to be realized.

Die Erfindung ist anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels beschrieben.The invention is based on an embodiment schematically illustrated in the drawing described.

Eine Ventilsteuerung 1 für nicht dargestellte Brennkraftmaschinen umfasst einen elektro-magnetischen Aktor 2 mit Gasfedern 3 und 4, wobei ein mit einem Gaswechselventil 5 in Antriebsverbindung stehender Anker 6 zwischen einem Schließmagneten 7 und einem Öffnungsmagneten 8 gegen Rückstellkräfte der Gasfedem 3 und 4 oszillierend angeordnet ist. Den Gasfedern 3 und 4 ist aus einem aufladbaren Speicher 9 mittels Leitungen 9', 9" ein Gas über ansteuerbare Ventile 10 zugemessen, wobei aus den Gasfedem 3 und 4 über ansteuerbare Ablass-Ventile 11 Gas abgelassen ist.A valve control 1 for unillustrated internal combustion engines comprises a electro-magnetic actuator 2 with gas springs 3 and 4, one with a gas exchange valve 5 in drive connection armature 6 between a closing magnet 7 and an opening magnet 8 against restoring forces of the gas springs. 3 and 4 is arranged oscillating. The gas springs 3 and 4 is made of a rechargeable Memory 9 by means of lines 9 ', 9 "a gas metered via controllable valves 10, wherein from the gas springs 3 and 4 via controllable discharge valves 11 gas is drained.

Zur Erzielung variabler Federkennlinien bei einfachem Aufbau des Aktors 2 in Verbindung mit einer gesteuerten Anschlagdämpfung, die zusätzlich bzw. unabhängig von den Ablass-Ventilen 11 beeinflussbar ist, wird erfindungsgemäß vorgeschlagen, dass der Anker 6 als ein in einem Zylinder 12 des Aktors 2 gleitbeweglich dicht angeordneter Trennkolben 13 zwischen beiden Gasfedern 3 und 4 ausgebildet ist, und dass die Zumess-Ventile 10 und die Ablass-Ventile 11 in Abhängigkeit von Lastbereichen der Brennkraftmaschine gesteuert der Einstellung angepasster Federkennlinien dienen, wobei die jeweilige Gasfeder 3, 4 jenseits der begrenzenden Stirnseite 7' bzw. 8' des Schließmagneten 7 bzw. des Öffnungsmagneten 8 mit einer gesteuert/geregelt volumenvariablen Kammer 14 im jeweiligen Magneten 7, 8 in Verbindung steht.To achieve variable spring characteristics with a simple structure of the actuator 2 in conjunction with a controlled stop damping, which additionally or independently is influenced by the discharge valves 11, the invention proposes that the armature 6 as a slidably disposed in a cylinder 12 of the actuator 2 tightly Separating piston 13 is formed between two gas springs 3 and 4, and that the metering valves 10 and the drain valves 11 as a function of Load ranges of the internal combustion engine controlled the setting of adapted spring characteristics serve, wherein the respective gas spring 3, 4 beyond the limiting End face 7 'and 8' of the closing magnet 7 and the opening magnet 8 with a controlled / regulated volume variable chamber 14 in each magnet 7, 8 in Connection stands.

Zur Erzielung einer vorbestimmten Federsteifigkeit einerseits und einer vorbestimmten Anschlag-Dämpfung andererseits umfasst jede Kammer 14 einen druckgesteuert gegen eine Rückstellfeder 15 verschiebbaren Kolben 16, über dessen Maß der Verschiebung ein entsprechender Verdichtungsenddruck zwischen Trennkolben 13 bzw. Anker 12 und der jeweiligen Stirnseite 7' bzw. 8' des Schließmagneten 7 bzw. des Öffnungsmagneten 8 bewirkt ist.To achieve a predetermined spring stiffness on the one hand and a predetermined Impact damping on the other hand, each chamber 14 includes a pressure controlled against a return spring 15 displaceable piston 16, via whose Dimension of the displacement a corresponding compression end pressure between separating piston 13 and armature 12 and the respective end face 7 'and 8' of the closing magnet 7 and the opening magnet 8 is effected.

Weiter ist über die Kammer 14 im Schließmagneten 7 mittels eines druckgesteuert beschleunigten Kolbens 16 beim Start der Brennkraftmaschine eine Gasverdrängung bewirkt zum Trennen eines in Schließstellung des Gaswechselventils 5 mittels eines Dauermagneten 17 an der Stirnseite 7' des Schließmagneten 7 gehaltenen Trennkolbens 13 bzw. Ankers 12, der beim Abstellen der Brennkraftmaschine druckgesteuert in dieser Schließstellung angeordnet ist.Next is via the chamber 14 in the closing magnet 7 by means of a pressure-controlled accelerated piston 16 at the start of the engine, a gas displacement causes a separation in the closed position of the gas exchange valve. 5 held by means of a permanent magnet 17 on the end face 7 'of the closing magnet 7 Separating piston 13 and armature 12, when parking the internal combustion engine pressure-controlled is arranged in this closed position.

Mit dieser Anordnung können sämtliche beim Stillstand der Brennkraftmaschine geschlossen gehaltenen Gaswechselventile beim Start der Brennkraftmaschine zunächst ohne Bestromung der jeweiligen Magnete rasch von der Halteposition gelöst werden und bei eingeschalteten Schließ- und Öffnungsmagneten rasch angeschwungen werden.With this arrangement, all at standstill of the internal combustion engine kept closed gas exchange valves at the start of the engine first quickly released from the holding position without energizing the respective magnets be swung quickly and with activated closing and opening magnet become.

Schließlich können die Kammern 14 jeweils gesondert oder gemeinsam angesteuert sein, womit beispielsweise bei gesonderter Ansteuerung der Kammern 14 in den Gasfedem 3 und 4 unterschiedliche Federkennlinien zu verwirklichen sind.Finally, the chambers 14 can each be controlled separately or jointly be, which, for example, with separate control of the chambers 14 in the Gas springs 3 and 4 different spring characteristics are to be realized.

Claims (4)

  1. A valve control system for internal combustion engines comprising an electromagnetic actuator equipped with pneumatic springs,
    wherein an armature (6) connected for drive purposes to a gas change valve (5) is disposed so as to oscillate between a closing magnet (7) and an opening magnet (8) against restoring forces of the pneumatic springs (3, 4), wherein
    the pneumatic springs (3, 4), separated by the armature (6), are supplied with metered amounts of a gas from a chargeable reservoir (9) via actuatable valves (10) and
    gas is discharged from the pneumatic springs (3, 4) via actuatable discharge valves (11),
    characterised in that
    the armature (6) is a separating piston (13) between the two pneumatic springs (3 and 4) and disposed in sealing-tight manner so as to be slidable in a cylinder (12) of the actuator (2), and
    the metering valves (10) and the discharge valves (11 ) are used to set suitable spring characteristics, controlled in dependence on the load ranges of the internal combustion engine, wherein
    the respective pneumatic spring (3, 4) on the other side of the bounding endface (7', 8') of the closing magnet (7) or the opening magnet (8) is connected to a closed loop/open-loop variable-volume chamber (14) in the respective magnet (7, 8).
  2. A valve control system according to claim 1, characterised in that
    each chamber (14) comprises a piston (16) movable under pressure control against a restoring spring (15), and
    the amount of displacement of the piston is used to obtain a corresponding compression end pressure between the separating piston (13) or armature (6) and the respective endface (7', 8') of the closing magnet (7) and of the opening magnet (8).
  3. A valve control system according to claims 1 and 2, characterised in that when the engine starts, gas is displaced through the chamber (14) in the closing magnet (7) by a piston (16) accelerated under pressure control in order to separate a separating piston (13) or armature (6) held by a permanent magnet (17) against the endface (7') of the closing magnet (7) when the gas change valve (5) is in the closed position,
    the piston or armature being in the said closed position under pressure control when the engine is shut off.
  4. A valve control system according to claims 1 to 3, characterised in that the chambers (14) are actuated individually and/or together.
EP00126374A 2000-01-26 2000-12-02 Engine valve drive with electromagnetic actuators comprising pneumatic return springs Expired - Lifetime EP1120549B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003115 2000-01-26
DE10003115A DE10003115A1 (en) 2000-01-26 2000-01-26 Valve control for internal combustion engines with an electro-magnetic actuator equipped with gas springs

Publications (3)

Publication Number Publication Date
EP1120549A2 EP1120549A2 (en) 2001-08-01
EP1120549A3 EP1120549A3 (en) 2001-12-05
EP1120549B1 true EP1120549B1 (en) 2005-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00126374A Expired - Lifetime EP1120549B1 (en) 2000-01-26 2000-12-02 Engine valve drive with electromagnetic actuators comprising pneumatic return springs

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EP (1) EP1120549B1 (en)
DE (2) DE10003115A1 (en)
ES (1) ES2239995T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2382378B (en) * 2001-11-22 2003-12-24 Keith Gordon Hall Electromagnetic valve actuator
JP2003314734A (en) * 2002-04-22 2003-11-06 Toyota Motor Corp Control apparatus for electromagnetically driven valve
WO2004044390A1 (en) * 2002-11-12 2004-05-27 Duckdive Pty. Limited High speed solenoid valve

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3106890B2 (en) 1995-01-11 2000-11-06 トヨタ自動車株式会社 Valve drive for internal combustion engine
DE19725218C2 (en) * 1997-06-15 2000-11-02 Daimler Chrysler Ag Device for actuating a gas exchange valve for an internal combustion engine
DE19733186A1 (en) * 1997-07-31 1999-02-04 Fev Motorentech Gmbh & Co Kg Gas exchange valve apparatus for piston engine
DE19829858A1 (en) * 1998-07-05 2000-01-13 Bayerische Motoren Werke Ag Combined electromagnetic / pneumatic actuator for controlling a lift valve, in particular gas exchange valve of an internal combustion engine
JP2000027616A (en) * 1998-07-10 2000-01-25 Nissan Motor Co Ltd Valve system for internal combustion engine

Also Published As

Publication number Publication date
DE50010392D1 (en) 2005-06-30
EP1120549A2 (en) 2001-08-01
DE10003115A1 (en) 2001-08-02
ES2239995T3 (en) 2005-10-16
EP1120549A3 (en) 2001-12-05

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