EP0971098A1 - Engine with pneumatic or hydraulic valve actuator - Google Patents

Engine with pneumatic or hydraulic valve actuator Download PDF

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Publication number
EP0971098A1
EP0971098A1 EP99109776A EP99109776A EP0971098A1 EP 0971098 A1 EP0971098 A1 EP 0971098A1 EP 99109776 A EP99109776 A EP 99109776A EP 99109776 A EP99109776 A EP 99109776A EP 0971098 A1 EP0971098 A1 EP 0971098A1
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EP
European Patent Office
Prior art keywords
compressed air
pneumatic
internal combustion
control
piston
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
EP99109776A
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German (de)
French (fr)
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EP0971098B1 (en
Inventor
Herbert Klausnitzer
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 of EP0971098A1 publication Critical patent/EP0971098A1/en
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Publication of EP0971098B1 publication Critical patent/EP0971098B1/en
Anticipated expiration legal-status Critical
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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
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/16—Pneumatic means

Definitions

  • the invention relates to a Internal combustion engine with a pneumatic and / or hydraulic actuator for a gas exchange lift valve, the lift valve with a shaft over its shaft a control chamber with pistons that can be acted upon on both sides in drive connection stands, and the control rooms on both sides of the piston with lines in connection stand, which are controlled by solenoid valves.
  • a pneumatically operated valve control for internal combustion engines in combination with a mechanical return spring is for example from DE-A 41 32 891 known, the supply and discharge of the pressure medium via electrically controlled Valves is effected.
  • a hydraulic valve control is known from DE-A 195 15 142, at of the supply and discharge lines of the hydraulic pressure medium from the control rooms are controlled on both sides of the piston via solenoid valves.
  • the invention is based on the object for a generic actuator for the control / reversal of large quantities of the respective print medium or Propose flow medium fast-acting solenoid valve with a simplified Arrangement of lines for supplying and discharging the respective flow medium.
  • solenoid valves Serve electromagnetically controlled coaxial valves and arranged them in this way are that by filling a single line to each control room and Emptying is effected.
  • a pneumatic actuator is selected the one with the front of the internal combustion engine in the area of the omitted camshaft drive Air pump arranged on a crankshaft with interposition a compressed air reservoir arranged in the cylinder head in connection stands.
  • An internal combustion engine 23, not shown, is preferably provided with a pneumatic actuator 4 equipped for a gas exchange valve 2.
  • the lift valve 2 stands over its shaft 2 'with one in a control chamber 3 on both sides Actuatable piston 1 in drive connection.
  • the piston 1 divides the Control chamber 3 in the control rooms 3 'and 3' ', the control room 3' with a Line 15 and the control room 3 '' according to Figure 2 with a line 18 in connection stands.
  • Solenoid valves 5 and 6 are used to control lines 15 and 18.
  • the control chamber 3 can be part of the actuator 4, in which the two further Electromagnetically controlled coaxial valves 5 and 6 are arranged.
  • the longitudinal channel 7 of the compressed air supply and the longitudinal channel 8 of the compressed air discharge serves.
  • the compressed air longitudinal duct 7 there is a compressed air supply duct in the actuator 10 connected, the two coaxial valves 5 and 6 feeds compressed air.
  • the compressed air duct 11 is connected in the actuator to the longitudinal duct 8 for compressed air discharge, The respective compressed air flows into the longitudinal channel via the valve-controlled system 8th.
  • Compressed air is always present in the supply duct 10. Via the disposal channel 11 the air flows into the longitudinal bore 8, from there, depending on the valve, through bores 12 in the intake or exhaust port 13 in the cylinder head 9.
  • FIG. 1 the opening of the valve 2 is shown.
  • An armature 14 of the coaxial valve 5 is in the lower position, so that compressed air via the channels 10 and 15 in can flow into the control chamber 3 above the piston 1, while the Disposal channel 16 of the coaxial valve 5 is closed.
  • An armature 17 of the coaxial valve 6 is in the upper position and closes the Compressed air supply, while the air below the piston 1 from the control room 3 '' can escape via the disposal channels or lines 18, 19 and 11.
  • the internal combustion engine 23 shown in FIG. 3 is on the front side in the area of the omitted one Camshaft drive with a compressed air pump arranged on the crankshaft 21 20 equipped with the interposition of one arranged in the cylinder head 9 Compressed air reservoir 22 with the compressed air supply duct 7 in connection stands.

Abstract

The engine has a lifting valve (2) with an operating connection via its shaft (2') to a piston (1) acted upon on both sides in a control chamber. The control vols. (3',3'') are connected to lines on both sides of the piston that are controlled by magnetic valves. Electromagnetic coaxial valves (5,6) are used and are arranged so that emptying and filling are effected via a single line (15,18) to each control vol.

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf eine Brennkraftmaschine mit einem pneumatischen und/oder hydraulischen Aktuator für ein Gaswechsel-Hubventil, wobei das Hubventil über seinen Schaft mit einem in einer Steuerkammer beidseitig beaufschlagbaren Kolben in Antriebsverbindung steht, und die Steuerräume beiderseits des Kolbens mit Leitungen in Verbindung stehen, die mittels Magnetventilen gesteuert sind.According to the preamble of claim 1, the invention relates to a Internal combustion engine with a pneumatic and / or hydraulic actuator for a gas exchange lift valve, the lift valve with a shaft over its shaft a control chamber with pistons that can be acted upon on both sides in drive connection stands, and the control rooms on both sides of the piston with lines in connection stand, which are controlled by solenoid valves.

Eine pneumatisch betätigte Ventilsteuerung für Brennkraftmaschinen in Kombination mit einer mechanischen Rückstellfeder ist beispielsweise aus der DE-A 41 32 891 bekannt, wobei die Zu- und Ableitung des Druckmediums über elektrisch gesteuerte Ventile bewirkt ist.A pneumatically operated valve control for internal combustion engines in combination with a mechanical return spring is for example from DE-A 41 32 891 known, the supply and discharge of the pressure medium via electrically controlled Valves is effected.

Weiter ist aus der DE-A 195 15 142 eine hydraulische Ventilsteuerung bekannt, bei der die Zu- und Ableitungen des hydraulischen Druckmediums aus den Steuerräumen beiderseits des Kolbens über Magnetventile gesteuert sind.Furthermore, a hydraulic valve control is known from DE-A 195 15 142, at of the supply and discharge lines of the hydraulic pressure medium from the control rooms are controlled on both sides of the piston via solenoid valves.

Da insbesondere bei Otto-Brennkraftmaschinen mit relativ hohen Drehzahlen in pneumatischen oder hydraulischen Aktuatoren die jeweiligen Druckmittel rasch zugeführt und abgeführt werden müssen, sind hierfür flink schaltende Ventile erforderlich.Because especially in Otto internal combustion engines with relatively high speeds in pneumatic or hydraulic actuators quickly supplied the respective pressure medium and must be discharged, fast-acting valves are required for this.

Der Erfindung liegt die Aufgabe zugrunde, für einen gattungsgemäßen Aktuator ein für die Steuerung/Umsteuerung großer Mengen an jeweiligem Druckmedium bzw. Strömungsmedium flink schaltendes Magnetventil vorzuschlagen mit einer vereinfachten Anordnung von Leitungen zum Zu- und Abführen des jeweiligen Strömungsmediums.The invention is based on the object for a generic actuator for the control / reversal of large quantities of the respective print medium or Propose flow medium fast-acting solenoid valve with a simplified Arrangement of lines for supplying and discharging the respective flow medium.

Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, daß als Magnetventile elektromagnetisch gesteuerte Koaxialventile dienen und diese derart angeordnet sind, daß mittels jeweils einer einzigen Leitung zu jedem Steuerraum das Füllen und Entleeren bewirkt ist.This object is achieved with claim 1 in that as solenoid valves Serve electromagnetically controlled coaxial valves and arranged them in this way are that by filling a single line to each control room and Emptying is effected.

Mit der erfindungsgemäßen Auswahl von elektromagnetischen Koaxialventilen in Verbindung mit der vereinfachten Leitungs-Anordnung ist in vorteilhafter Weise ein relativ einfacher Aufbau des jeweiligen Aktuators erzielt.With the selection according to the invention of electromagnetic coaxial valves in Connection with the simplified line arrangement is advantageously a achieved relatively simple structure of the respective actuator.

In bevorzugter Ausgestaltung der Erfindung ist ein pneumatischer Aktuator gewählt, der mit einer stirnseitig der Brennkraftmaschine im Bereich des entfallenen Nockenwellentriebes auf einer Kurbelwelle angeordneten Druckluftpumpe unter Zwischenschaltung eines im Zylinderkopf angeordneten Druckluftspeichers in Verbindung steht.In a preferred embodiment of the invention, a pneumatic actuator is selected the one with the front of the internal combustion engine in the area of the omitted camshaft drive Air pump arranged on a crankshaft with interposition a compressed air reservoir arranged in the cylinder head in connection stands.

Die vorbeschriebene Anordnung ist vorteilhaft für Brennkraftmaschinen, die von einer mechanischen Gaswechsel-Ventilsteuerung auf eine pneumatische oder hydraulische Steuerung umzurüsten sind.The arrangement described above is advantageous for internal combustion engines by a mechanical gas exchange valve control to a pneumatic or hydraulic Control must be converted.

Die Erfindung ist anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels beschrieben. Es zeigt

Figur 1
einen pneumatischen und/oder hydraulischen Aktuator für ein Gaswechsel-Hubventil einer Brennkraftmaschine,
Figur 2
einen Schnitt gemäß der Linie II - II in Figur 1 und
Figur 3
ein Druckluftsystem in einer Brennkraftmaschine für pneumatische Aktuatoren.
The invention is described with reference to an embodiment shown schematically in the drawing. It shows
Figure 1
a pneumatic and / or hydraulic actuator for a gas exchange stroke valve of an internal combustion engine,
Figure 2
a section along the line II - II in Figure 1 and
Figure 3
a compressed air system in an internal combustion engine for pneumatic actuators.

Eine nicht näher dargestellte Brennkraftmaschine 23 ist vorzugsweise mit einem pneumatischen Aktuator 4 für ein Gaswechsel-Hubventil 2 ausgerüstet. Das Hubventil 2 steht über seinen Schaft 2' mit einem in einer Steuerkammer 3 beidseitig beaufschlagbaren Kolben 1 in Antriebsverbindung. Der Kolben 1 unterteilt die Steuerkammer 3 in die Steuerräume 3' und 3'', wobei der Steuerraum 3' mit einer Leitung 15 und der Steuerraum 3'' gemäß Figur 2 mit einer Leitung 18 in Verbindung steht. Magnetventile 5 und 6 dienen der Steuerung der Leitungen 15 und 18.An internal combustion engine 23, not shown, is preferably provided with a pneumatic actuator 4 equipped for a gas exchange valve 2. The lift valve 2 stands over its shaft 2 'with one in a control chamber 3 on both sides Actuatable piston 1 in drive connection. The piston 1 divides the Control chamber 3 in the control rooms 3 'and 3' ', the control room 3' with a Line 15 and the control room 3 '' according to Figure 2 with a line 18 in connection stands. Solenoid valves 5 and 6 are used to control lines 15 and 18.

Um im Hinblick auf hohe Drehzahlen insbesondere bei Otto-Brennkraftmaschinen ein sicheres Befüllen und Entleeren der Steuerräume 3' und 3'' zu erzielen, wird erfindungsgemäß vorgeschlagen, daß als Magnetventile elektromagnetisch gesteuerte Koaxialventile 5 und 6 dienen und diese derart angeordnet sind, daß mittels jeweils einer einzigen Leitung 15 bzw. 18 zu jedem Steuerraum 3' bzw. 3'' das Füllen und Entleeren bewirkt ist.In order to achieve high speeds, especially with Otto internal combustion engines Achieving a safe filling and emptying of the control rooms 3 'and 3' 'is according to the invention proposed that as solenoid valves controlled electromagnetically Serve coaxial valves 5 and 6 and these are arranged such that by means of each a single line 15 or 18 to each control room 3 'or 3' 'and the filling Emptying is effected.

Die Steuerkammer 3 kann Bestandteil des Aktuators 4 sein, in dem ferner die beiden elektromagnetisch gesteuerten Koaxialventile 5 und 6 angeordnet sind. Im Zylinderkopf 9 sind der Steuerkammer 3 benachbart Längskanäle 7 und 8 zugeordnet, wobei der Längskanal 7 der Druckluftzuführung und der Längskanal 8 der Druckluftabfuhr dient. Mit dem Druckluft-Längskanal 7 ist im Aktuator ein Druckluft-Versorgungskanal 10 verbunden, der beiden Koaxialventilen 5 und 6 Druckluft zuführt. Mit dem Längskanal 8 zur Druckluftabfuhr ist im Aktuator der Druckluftkanal 11 verbunden, über den ventilgesteuert die jeweilige Druckluft abströmt in den Längskanal 8. The control chamber 3 can be part of the actuator 4, in which the two further Electromagnetically controlled coaxial valves 5 and 6 are arranged. In the cylinder head 9 are assigned to the control chamber 3 adjacent longitudinal channels 7 and 8, the longitudinal channel 7 of the compressed air supply and the longitudinal channel 8 of the compressed air discharge serves. With the compressed air longitudinal duct 7 there is a compressed air supply duct in the actuator 10 connected, the two coaxial valves 5 and 6 feeds compressed air. The compressed air duct 11 is connected in the actuator to the longitudinal duct 8 for compressed air discharge, The respective compressed air flows into the longitudinal channel via the valve-controlled system 8th.

Im Versorgungskanal 10 steht immer Druckluft an. Über den Entsorgungskanal 11 strömt die Luft in die Längsbohrung 8, von dort, je nach Ventil, über Bohrungen 12 in den Ein- oder Auslaßkanal 13 im Zylinderkopf 9.Compressed air is always present in the supply duct 10. Via the disposal channel 11 the air flows into the longitudinal bore 8, from there, depending on the valve, through bores 12 in the intake or exhaust port 13 in the cylinder head 9.

In Figur 1 ist das Öffnen des Ventils 2 dargestellt. Ein Anker 14 des Koaxialventils 5 befindet sich in der unteren Stellung, so daß Druckluft über die Kanäle 10 und 15 in den Steuerraum 3 oberhalb des Kolbens 1 einströmen kann, während dabei der Entsorgungskanal 16 des Koaxialventils 5 verschlossen ist.In Figure 1, the opening of the valve 2 is shown. An armature 14 of the coaxial valve 5 is in the lower position, so that compressed air via the channels 10 and 15 in can flow into the control chamber 3 above the piston 1, while the Disposal channel 16 of the coaxial valve 5 is closed.

Ein Anker 17 des Koaxialventils 6 ist in der oberen Stellung und verschließt die Druckluftzufuhr, während die Luft unterhalb des Kolbens 1 aus dem Steuerraum 3'' über die Entsorgungskanäle bzw. Leitungen 18, 19 und 11 entweichen kann.An armature 17 of the coaxial valve 6 is in the upper position and closes the Compressed air supply, while the air below the piston 1 from the control room 3 '' can escape via the disposal channels or lines 18, 19 and 11.

Zum Schließen des Hubventils 2 wird Druckluft in den unteren Steuerraum 3'' über die Leitung 18 und das obere Koaxialventil 6 aus dem Druckluftkanal 10 zugeführt, wobei das untere Koaxialventil 5 in Öffnungsstellung die Druckluft über die Leitungen 15 und 16 in den Entsorgungskanal 11 abströmen läßt.To close the lift valve 2, compressed air is fed into the lower control chamber 3 ″ the line 18 and the upper coaxial valve 6 are fed from the compressed air duct 10, the lower coaxial valve 5 in the open position the compressed air via the lines 15 and 16 can flow into the disposal channel 11.

Die in Figur 3 dargestellte Brennkraftmaschine 23 ist stirnseitig im Bereich des entfallenen Nockenwellentriebes mit einer auf der Kurbelwelle 21 angeordneten Druckluftpumpe 20 ausgerüstet, die unter Zwischenschaltung eines im Zylinderkopf 9 angeordneten Druckluftspeichers 22 mit dem Druckluftversorgungskanal 7 in Verbindung steht.The internal combustion engine 23 shown in FIG. 3 is on the front side in the area of the omitted one Camshaft drive with a compressed air pump arranged on the crankshaft 21 20 equipped with the interposition of one arranged in the cylinder head 9 Compressed air reservoir 22 with the compressed air supply duct 7 in connection stands.

Claims (2)

Brennkraftmaschine mit einem pneumatischen und/oder hydraulischen Aktuator für ein Gaswechsel-Hubventil wobei das Hubventil (2) über seinen Schaft (2') mit einem in einer Steuerkammer (3) beidseitig beaufschlagbaren Kolben (1) in Antriebsverbindung steht, und die Steuerräume (3', 3'') beiderseits des Kolbens (1) mit Leitungen (15, 18) in Verbindung stehen, die mittels Magnetventilen (5, 6) gesteuert sind,
dadurch gekennzeichnet, daß als Magnetventile elektromagnetisch gesteuerte Koaxialventile (5, 6) dienen und diese derart angeordnet sind, daß mittels jeweils einer einzigen Leitung (15, 18) zu jedem Steuerraum (3', 3'') das Füllen und Entleeren bewirkt ist. Internal combustion engine with a pneumatic and / or hydraulic actuator for a gas exchange valve wherein the stroke valve (2) is in drive connection via its shaft (2 ') with a piston (1) which can be acted upon on both sides in a control chamber (3), and the control spaces (3 ', 3'') on both sides of the piston (1) are connected to lines (15, 18) which are controlled by means of solenoid valves (5, 6),
characterized, that electromagnetically controlled coaxial valves (5, 6) serve as solenoid valves and are arranged in such a way that the filling and emptying is effected by means of a single line (15, 18) to each control chamber (3 ', 3''). Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß ein pneumatischer Aktuator (4) vorgesehen ist, der mit einer stirnseitig an der Brennkraftmaschine (23) im Bereich des entfallenen Nockenwellentriebes auf einer Kurbelwelle (21) angeordneten Druckluftpumpe (20) unter Zwischenschaltung eines im Zylinderkopf (9) angeordneten Druckluftspeichers (22) in Verbindung steht. Internal combustion engine according to claim 1, characterized in that a pneumatic actuator (4) is provided which communicates with a compressed air pump (20) arranged on the end face of the internal combustion engine (23) in the area of the camshaft drive on a crankshaft (21) with the interposition of a compressed air reservoir (22) arranged in the cylinder head (9).
EP99109776A 1998-07-05 1999-05-18 Engine with pneumatic or hydraulic valve actuator Expired - Lifetime EP0971098B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19829857 1998-07-05
DE19829857A DE19829857A1 (en) 1998-07-05 1998-07-05 Internal combustion engine with a pneumatic and / or hydraulic actuator for a gas exchange valve

Publications (2)

Publication Number Publication Date
EP0971098A1 true EP0971098A1 (en) 2000-01-12
EP0971098B1 EP0971098B1 (en) 2003-07-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10137767B4 (en) * 2000-08-02 2008-11-20 Ford Global Technologies, Dearborn Gas exchange channel between two inlet openings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008006777B4 (en) 2008-01-30 2018-08-09 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve train with a pneumatic reset system and method of operating the valve train

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844528A (en) * 1971-12-30 1974-10-29 P Massie Electrically operated hydraulic valve particularly adapted for pollution-free electronically controlled internal combustion engine
GB2206646A (en) * 1987-07-08 1989-01-11 Gwendoline Innes Engine valve gear
DE4132891A1 (en) 1991-10-04 1993-04-08 Audi Ag Pneumatically operated valve for IC engine with electronic timing control - has pneumatic piston on valve stem in cylinder on top of combustion cylinder and with valve deflection monitor
US5253619A (en) * 1992-12-09 1993-10-19 North American Philips Corporation Hydraulically powered actuator with pneumatic spring and hydraulic latching
DE19515142A1 (en) 1994-06-27 1996-01-11 Ford Werke Ag Internal combustion engine
US5713316A (en) * 1995-05-17 1998-02-03 Sturman; Oded E. Hydraulic actuator for an internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1866548U (en) * 1962-02-28 1963-01-31 Gottfried Mueller FLOW VALVE.
EP0244878B1 (en) * 1985-02-11 1990-10-31 INTERATOM Gesellschaft mit beschränkter Haftung Electromagnetic-hydraulic valve drive for an internal-combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844528A (en) * 1971-12-30 1974-10-29 P Massie Electrically operated hydraulic valve particularly adapted for pollution-free electronically controlled internal combustion engine
GB2206646A (en) * 1987-07-08 1989-01-11 Gwendoline Innes Engine valve gear
DE4132891A1 (en) 1991-10-04 1993-04-08 Audi Ag Pneumatically operated valve for IC engine with electronic timing control - has pneumatic piston on valve stem in cylinder on top of combustion cylinder and with valve deflection monitor
US5253619A (en) * 1992-12-09 1993-10-19 North American Philips Corporation Hydraulically powered actuator with pneumatic spring and hydraulic latching
DE19515142A1 (en) 1994-06-27 1996-01-11 Ford Werke Ag Internal combustion engine
US5713316A (en) * 1995-05-17 1998-02-03 Sturman; Oded E. Hydraulic actuator for an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10137767B4 (en) * 2000-08-02 2008-11-20 Ford Global Technologies, Dearborn Gas exchange channel between two inlet openings

Also Published As

Publication number Publication date
EP0971098B1 (en) 2003-07-30
DE59906421D1 (en) 2003-09-04
DE19829857A1 (en) 2000-01-13

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