EP1120550A2 - 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
EP1120550A2
EP1120550A2 EP00126375A EP00126375A EP1120550A2 EP 1120550 A2 EP1120550 A2 EP 1120550A2 EP 00126375 A EP00126375 A EP 00126375A EP 00126375 A EP00126375 A EP 00126375A EP 1120550 A2 EP1120550 A2 EP 1120550A2
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EP
European Patent Office
Prior art keywords
gas
gas springs
armature
springs
internal combustion
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
EP00126375A
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German (de)
French (fr)
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EP1120550A3 (en
EP1120550B1 (en
Inventor
Hans-Jörg Steffens
Frank Meissner
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1120550A2 publication Critical patent/EP1120550A2/en
Publication of EP1120550A3 publication Critical patent/EP1120550A3/en
Application granted granted Critical
Publication of EP1120550B1 publication Critical patent/EP1120550B1/en
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Expired - Lifetime legal-status Critical Current

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    • 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

Abstract

The controller has an electromagnetic actuator with gas springs and an armature connected to a gas replacement valve and oscillating between magnets. Gas is fed from a reservoir via valves to the gas springs, which are separated by the armature, and is let out of the gas springs by outlet valves. The armature is a separating piston sliding in an actuator cylinder between the gas springs, which use a medium with larger molecules than air. The valve controller has an electromagnetic actuator (2) fitted with gas springs (3,4) and an armature (6) connected to a gas replacement valve (5) and oscillating between closing and opening magnets (7,8). Gas is fed from a rechargeable reservoir (9) via controlled valves (10) to the gas springs, which are separated by the armature, and gas is let out of the gas springs by controlled outlet valves (11). The armature is a separating piston (13) able to slide in an actuator cylinder (12) between the gas springs, which use a medium whose molecule size is greater than that of air.

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf eine Ventilsteuerung für Brennkraftmaschinen mit einem mit Gasfedern 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 to a preamble of claim 1 Valve control for internal combustion engines with one equipped with gas springs electro-magnetic actuator, in which one with a gas exchange valve in drive connection standing anchor between a closing magnet and an opening magnet is arranged to oscillate against restoring forces of the gas springs, the gas springs separated from each other by means of the armature from a chargeable Store a gas metered via controllable valves and from the gas springs Gas is drained via controllable drain valves.

Eine derartige Ventilsteuerung ist beispielsweise aus der US 5,611,303 bekannt, wobei die Ausgestaltung der Gasfedern beiderseits des Ankers über an diesen beiderseits angeordneten Rohrabschnitten in Verbindung mit einer Hubverstellung des Aktors zu einer aufwendigen Dichtungsanordnung führt mit erheblichen Reibungsverlusten einerseits und Dichtungsverlusten der Dichtungsanordnung andererseits. Zwar können die Dichtungsverluste durch eine entsprechende Versorgung der Gasfedern aus dem aufladbaren Speicher kompensiert werden, was jedoch zu einer erhöhten Leistungsaufnahme einer den Speicher versorgenden Luftpumpe führt. Such a valve control is known for example from US 5,611,303, the design of the gas springs on both sides of the armature being on both sides of the armature arranged pipe sections in connection with a stroke adjustment of the Actuator to a complex seal arrangement leads to considerable friction losses on the one hand and sealing losses of the sealing arrangement on the other. Sealing losses can be achieved by supplying the Gas springs from the rechargeable memory can be compensated, but this leads to a increased power consumption of an air pump supplying the memory.

Der Erfindung liegt die Aufgabe zugrunde, für eine gattungsgemäße Ventilsteuerung ein Gasfedern-System mit geringeren Dichtungsverlusten aufzuzeigen.The invention is based, for a generic valve control the task to show a gas spring system with lower sealing losses.

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, wobei für die Gasfedern ein Medium mit die Größe von Luftmolekülen übertreffenden Molekülen verwendet ist.This problem is solved with claim 1 in that the anchor as a in a cylinder of the actuator slidably arranged separating piston between is formed two gas springs, with a medium for the gas springs with the Size of molecules exceeding air molecules is used.

Der Vorteil der Erfindung ist darin zu sehen, dass bei gleichem, für Luft als Medium verwendeten Dichtspalt bei Einsatz eines Mediums mit die Luftmoleküle in ihrer Größe wesentlich übertreffenden Molekühlen die Strömungs- bzw. Dichtungsverluste wesentlich reduziert sind.The advantage of the invention can be seen in the fact that the same, for air as a medium used sealing gap when using a medium with the air molecules in their Molecules significantly exceed size, the flow or sealing losses are significantly reduced.

Als ein vorteilhaft geeignetes Medium wird hierfür Kohlendioxid vorgeschlagen, wobei hierfür vorzugsweise in der Brennkraftmaschine erzeugtes Kohlendioxid verwendet ist.Carbon dioxide is proposed as an advantageously suitable medium for this purpose carbon dioxide generated in the internal combustion engine is preferably used for this is.

Für den Einsatz des bei einer Verbrennung in der Brennkraftmaschine erzeugten Kohlendioxides wird in weiterer Ausgestaltung vorgeschlagen, dass abgasseitiges Kohlendioxid der Brennkraftmaschine über eine Reinigungs- und/oder Kühleinrichtung dem Speicher zugeführt ist und dass die den Gasfedern zugeordneten Zumess-Ventile und Ablass-Ventile über Lastbereiche der Brennkraftmaschine gesteuert der Einstellung angepasster Federkennlinien dienen.For the use of the generated during combustion in the internal combustion engine In a further embodiment, carbon dioxide is proposed to be on the exhaust side Carbon dioxide of the internal combustion engine via a cleaning and / or cooling device is supplied to the memory and that the metering valves assigned to the gas springs and drain valves controlled over load ranges of the internal combustion engine serve to adjust adjusted spring characteristics.

Die Erfindung ist anhand eines in der Zeichnung schematisch dargestellten Beispiels einer Ventilsteuerung beschrieben.The invention is based on an example shown schematically in the drawing described a valve control.

Eine Ventilsteuerung 1 für eine nicht gezeigte Brennkraftmaschine umfasst einen elektro-magnetischen Aktor 2 mit Gasfedern 3, 4, wobei ein mit einem Gaswechselventil 5 in Antriebsverbindung stehender Anker 6 zwischen einem Schließmagneten 7 und einem Öffnungsmagneten 8 gegen Rückstellkräfte der Gasfedern 3, 4 oszillierend angeordnet ist. A valve controller 1 for an internal combustion engine, not shown, includes one electro-magnetic actuator 2 with gas springs 3, 4, one with a gas exchange valve 5 armature 6 in drive connection between a closing magnet 7 and an opening magnet 8 oscillating against restoring forces of the gas springs 3, 4 is arranged.

Den Gasfedern 3 und 4 ist aus einem aufladbaren Speicher 9 über Leitungen 9' und 9" ein Gas über ansteuerbare Ventile 10 zugemessen, wobei aus den Gasfedern 3 und 4 über ansteuerbare Ablass-Ventile 11 Gas abgelassen ist.The gas springs 3 and 4 is from a rechargeable memory 9 via lines 9 'and 9 "metered a gas via controllable valves 10, with gas springs 3 and 4 gas is triggered via controllable drain valves 11.

Zur Erzielung eines Gasfeder-Systems mit geringen Dichtungsverlusten ist erfindungsgemäß vorschlagen, 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, wobei für die Gasfedern 3 und 4 ein Medium mit die Größe von Luftmolekülen übertreffenden Molekülen verwendet ist.To achieve a gas spring system with low sealing losses, the invention suggest that the armature 6 as one in a cylinder 12 of the actuator 2 separating piston 13 arranged so as to be slidably movable between the two gas springs 3 and 4 is formed, being a medium with the size for the gas springs 3 and 4 of molecules exceeding air molecules is used.

Erfindungsgemäß findet vorzugsweise Kohlendioxid (CO2) als Medium Verwendung. Dies ergibt den Vorteil, in einer Brennkraftmaschine bei der Verbrennung entstehendes Kohlendioxid zu verwenden.According to the invention, carbon dioxide (CO 2 ) is preferably used as the medium. This gives the advantage of using carbon dioxide produced during combustion in an internal combustion engine.

Zur Erzielung einer betriebssicheren Ventilsteuerung 1 ist das abgasseitige Kohlendioxid der Brennkraftmaschine über eine Reinigungs- und/oder Kühleinrichtung 14 dem Speicher 9 zugeführt, aus dem das Kohlendioxid über Leitungen 9' und 9" den Gasfedern 3 und 4 gesteuert zuströmt. Die gesteuerte Zuströmung ist so getroffen, dass die den Gasfedern 3 und 4 zugeordneten Zumess-Ventile 10 und Ablass-Ventile 11 über Lastbereiche der Brennkraftmaschine gesteuert der Einstellung angepasster Federkennlinien der Gasfedern 3 und 4 dienen.To achieve a reliable valve control 1, the exhaust-side carbon dioxide the internal combustion engine via a cleaning and / or cooling device 14 fed to the memory 9, from which the carbon dioxide via lines 9 'and 9 " Gas springs 3 and 4 flow in a controlled manner. The controlled inflow is made so that the metering valves 10 and drain valves assigned to the gas springs 3 and 4 11 controlled by the load ranges of the internal combustion engine adapted to the setting Spring characteristics of the gas springs 3 and 4 are used.

Claims (4)

Ventilsteuerung für Brennkraftmaschinen mit einem mit Gasfedern ausgerüsteten elektro-magnetischen Aktor, bei dem ein mit einem Gaswechselventil (5) in Antriebsverbindung stehender Anker (6) zwischen einem Schließmagneten (7) und einem Öffnungsmagneten (8) gegen Rückstellkräfte der Gasfedern (3, 4) oszillierend angeordnet ist, wobei den mittels des Ankers (6) voneinander getrennten Gasfedern (3, 4) aus einem aufladbaren Speicher (9) ein Gas über ansteuerbare Ventile (10) zugemessen und aus den Gasfedern (3, 4) über ansteuerbare Ablass-Ventile (11) Gas abgelassen ist,    dadurch gekennzeichnet, dass der Anker (6) als ein in einem Zylinder (12) des Aktors (2) gleitbeweglich dicht angeordneter Trennkolben (13) zwischen beiden Gasfedern (3, 4) ausgebildet ist, wobei für die Gasfedern (3, 4) ein Medium mit die Größe von Luftmolekülen übertreffenden Molekülen verwendet ist. Valve control for internal combustion engines with an electro-magnetic actuator equipped with gas springs, in which an armature (6), which is in drive connection with a gas exchange valve (5), is arranged in an oscillating manner between a closing magnet (7) and an opening magnet (8) against restoring forces of the gas springs (3, 4), wherein the gas springs (3, 4) separated from each other by means of the armature (6) from a rechargeable memory (9) are metered in a gas via controllable valves (10) and gas is released from the gas springs (3, 4) via controllable drain valves (11), characterized, that the armature (6) is designed as a separating piston (13) between the two gas springs (3, 4), which is arranged so as to be slidably movable in a cylinder (12) of the actuator (2) for the gas springs (3, 4) a medium with molecules larger than the size of air molecules is used. Ventilsteuerung nach Anspruch 1, dadurch gekennzeichnet, dass das Medium Kohlendioxid (CO2) ist. Valve control according to claim 1, characterized in that the medium is carbon dioxide (CO 2 ). Ventilsteuerung nach Anspruch 2, dadurch gekennzeichnet, dass in der Brennkraftmaschine erzeugtes Kohlendioxid (CO2) verwendet ist.Valve control according to claim 2, characterized in that carbon dioxide (CO 2 ) generated in the internal combustion engine is used. Ventilsteuerung nach Anspruch 3, dadurch gekennzeichnet, dass abgasseitiges Kohlendioxid (CO2) der Brennkraftmaschine über eine Reinigungs- und/oder Kühleinrichtung (14) dem Speicher (9) zugeführt ist und dass die den Gasfedern (3, 4) zugeordneten Zumess-Ventile (10) und Ablass-Ventile (11) über Lastbereiche der Brennkraftmaschine gesteuert der Einstellung angepasster Federkennlinien dienen. Valve control according to claim 3, characterized in that the exhaust-side carbon dioxide (CO 2 ) of the internal combustion engine is fed to the store (9) via a cleaning and / or cooling device (14) and that the metering valves (10) and drain valves (11) assigned to the gas springs (3, 4) are used to adjust adapted spring characteristics in a manner controlled by load ranges of the internal combustion engine.
EP00126375A 2000-01-26 2000-12-02 Engine valve drive with electromagnetic actuators comprising pneumatic return springs Expired - Lifetime EP1120550B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003142 2000-01-26
DE10003142A DE10003142A1 (en) 2000-01-26 2000-01-26 Valve control for internal combustion engines with an electro-magnetic actuator equipped with gas springs

Publications (3)

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EP1120550A2 true EP1120550A2 (en) 2001-08-01
EP1120550A3 EP1120550A3 (en) 2001-12-05
EP1120550B1 EP1120550B1 (en) 2005-06-08

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EP00126375A Expired - Lifetime EP1120550B1 (en) 2000-01-26 2000-12-02 Engine valve drive with electromagnetic actuators comprising pneumatic return springs

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EP (1) EP1120550B1 (en)
DE (2) DE10003142A1 (en)
ES (1) ES2239996T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004044390A1 (en) * 2002-11-12 2004-05-27 Duckdive Pty. Limited High speed solenoid valve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611303A (en) 1995-01-11 1997-03-18 Toyota Jidosha Kabushiki Kaisha Valve operating apparatus of internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19725218C2 (en) * 1997-06-15 2000-11-02 Daimler Chrysler Ag Device for actuating a gas exchange valve for an internal combustion engine
DE29804549U1 (en) * 1998-03-14 1998-07-02 Fev Motorentech Gmbh & Co Kg Electromagnetically actuated gas exchange valve for a piston internal combustion engine with pneumatic return springs
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611303A (en) 1995-01-11 1997-03-18 Toyota Jidosha Kabushiki Kaisha Valve operating apparatus of internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004044390A1 (en) * 2002-11-12 2004-05-27 Duckdive Pty. Limited High speed solenoid valve

Also Published As

Publication number Publication date
EP1120550A3 (en) 2001-12-05
DE10003142A1 (en) 2001-08-02
ES2239996T3 (en) 2005-10-16
DE50010513D1 (en) 2005-07-14
EP1120550B1 (en) 2005-06-08

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