WO2009152880A1 - Device for changing the angle of rotation position of a camshaft - Google Patents

Device for changing the angle of rotation position of a camshaft Download PDF

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Publication number
WO2009152880A1
WO2009152880A1 PCT/EP2008/067903 EP2008067903W WO2009152880A1 WO 2009152880 A1 WO2009152880 A1 WO 2009152880A1 EP 2008067903 W EP2008067903 W EP 2008067903W WO 2009152880 A1 WO2009152880 A1 WO 2009152880A1
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WO
WIPO (PCT)
Prior art keywords
valve
switching
connecting line
camshaft
phaser
Prior art date
Application number
PCT/EP2008/067903
Other languages
German (de)
French (fr)
Inventor
Andreas Eichendorf
Original Assignee
Robert Bosch Gmbh
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
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009152880A1 publication Critical patent/WO2009152880A1/en

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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34409—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by torque-responsive means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member

Definitions

  • the invention relates to a device for changing the rotational angle position of a camshaft according to the preamble of the main claim.
  • a device for changing the rotational angle position of a camshaft relative to a crankshaft from DE 100 20 119 A1 comprising a hydraulic phase divider, a delivery unit supplying the hydraulic phase divider with fluid, and a 4/3 control valve controlling the hydraulic phase divider, which is designed as a proportional flow valve and dosed the amount of oil through the stroke of the valve and the ⁇ ffhungsdauer.
  • the disadvantage is that the phase divider is adjustable exclusively by means of a pressure generated by a delivery unit.
  • the proportional flow valve requires a comparatively large amount of space, is expensive and continuously consumes electricity.
  • the control characteristics of analog proportional valves have undesirable hysteresis characteristics due to unavoidable frictional effects in the valves.
  • the device according to the invention with the characterizing features of the main claim has the advantage that the phase divider is adjustable both via a hydraulic pressure generated by the delivery unit and the alternating torques of the camshaft by instead of a 4/3 proportional valve two fast switchable 3/2 Switching or directional valves are provided for controlling the phaser.
  • the adjustment by means of the camshaft alternating torques is also called CTA (Cam Torque
  • the device according to the invention is also referred to as pulse width modulating hydraulic system.
  • the manufacturing cost is reduced, since the 3 / 2- switching valves are cheaper than a 4/3 proportional valve.
  • space is saved.
  • the 3/2-way valves only need power for holding the one switching position. There are no hysteresis effects in the 3/2 switching valves, so that the control deviation and susceptibility to vibration are lower than in the prior art.
  • the drawing shows schematically a device according to the invention.
  • the device 1 is used to adjust the rotational angle position of a camshaft 2 relative to a crankshaft 3 and has a well-known hydraulic phase divider 4.
  • the Camshaft 2 controls the opening and closing of gas exchange valves 6.
  • the hydraulic phase divider 4 has a stator housing 4.1 with a stator chamber 4.2 and a rotatably mounted in the stator chamber 4.2 in a predetermined angular range rotor 4.3.
  • the actuator housing 4.1 is mechanically connected via a drive means with the crankshaft 3 and the rotor 4.3 with the camshaft 2. Through the interposition of the phaser 4 between the crankshaft 3 and the camshaft 2, a variable control of the gas exchange valves 6 is achieved.
  • Statorwing 4.4 and rotor 4.3 are formed on the rotor blades 4.5.
  • the rotor 4.3 is rotatably arranged with its rotor blades 4.5 in the angular range between the stator blades 4.4.
  • working chambers 4.6 are formed in the circumferential direction between the stator blades 4.4 of the stator chamber 4.2 and the rotor blades 4.5 of the rotor, which are filled with fluid.
  • the angular position or the phase angle is adjusted in a known manner by the rotor blades 4.5 are pressurized from one side by filling the corresponding working chambers 4.6 with a pressure and the other side of the rotor blades 4.5 facing working chambers are emptied 4.6 by a corresponding volume ,
  • two 3/2-way valves 7, 8 are provided for controlling the phaser 4.
  • the pressurization of the respective working chambers 4.6 of the phaser 4 is controlled by the 3/2-way valves 7.8, which are for example actuated electromagnetically and controlled pulse width modulated.
  • the hydraulic pressure is generated by means of a delivery unit 9, sucks the fluid from a reservoir 10 and promotes the phaser 4 through the 3/2-way valves 7.8.
  • the delivery unit is for example an engine oil pump of an internal combustion engine and the reservoir 10, for example, the oil pan of the internal combustion engine. Due to the inventive design of the phaser 4 is adjustable both via a hydraulic pressure generated by the delivery unit 9 (OPA adjustment) and by the alternating torques of the camshaft (CTA adjustment).
  • the phase adjuster 4 has a first phase adjuster connection 11 for adjustment in one direction of rotation and a second phase adjuster connection 12 for adjustment in the other direction of rotation, the 3/2-shift valves 7, 8 in each case three connections 7, 7, 7, 2, 7, 8, 8, 8, 2, 8.3 and have two switch positions 15.1, 15.2, 16.1, 16.2.
  • One of the ports 7.1 of the first 3/2-way valve 7 is fluidly connected to the first phaser port 11 and one of the ports 8.1 of the second 3/2-way valve 8 to the second phaser port 12.
  • Each of the 3/2-way valves 7,8 has two connections 7,2,7,3,8,2,8.3 facing away from the phase divider 4, the connection 7.2 of the first switching valve 7 via a first connection line 17 to the connection 8.2 of the second switching valve 8 and the connection 7.3 of the first switching valve 7 is connected via a second connecting line 18 to the terminal 8.3 of the second switching valve 8.
  • the first connecting line 17 is fluidly connected to the reservoir 10 via a delivery line 19 containing the delivery unit 9.
  • the second connecting line 18 is flow-connected via a return line 20 to the reservoir 10.
  • a check valve 23, 24, which allows only one flow direction from the delivery unit 9 in the direction of the switching valves 7, 8, is connected upstream of the two connections 7.2, 2.8.
  • a control valve 25 is provided, the oil can drain from a predetermined pressure in the second connecting line 18 back into the reservoir 10.
  • the switching valves 7, 8 are switched such that the pressurized first connecting line 17 is flow-connected to the first port 11 of the phaser 4 and the second port 12 of the phaser 4 via the second connecting line 18 and the return line 20 to the reservoir 10 is fluidly connected or vice versa.
  • the switching valve 7 in the switching position 15.1 and the switching valve 8 in the switching position 16.1 as shown by way of example in the drawing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Known devices for changing the angle of rotation position of a camshaft relative to a crankshaft comprise a hydraulic phase adjuster, a delivery unit supplying the hydraulic phase adjuster with fluid and a 4/3 control valve controlling the hydraulic phase adjuster, the control valve being designed as a proportional flow-control valve and dosing the amount of oil via the valve lift and the opening period. The known devices are disadvantageous in that the phase adjuster can only be adjusted by the pressure generated by the delivery unit and the oscillating torques of the camshaft. The device according to the invention is characterized in that two 3/2 control valves (7, 8) are used for controlling the phase adjuster (4).

Description

Beschreibung description
Titeltitle
Vorrichtung zum Verändern der Drehwinkellage einer NockenwelleDevice for changing the rotational angle position of a camshaft
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zum Verändern der Drehwinkellage einer Nockenwelle nach der Gattung des Hauptanspruchs.The invention relates to a device for changing the rotational angle position of a camshaft according to the preamble of the main claim.
Es ist schon eine Vorrichtung zum Verändern der Drehwinkellage einer Nockenwelle relativ zu einer Kurbelwelle aus der DE 100 20 119 Al bekannt, mit einem hydraulischen Phasensteiler, einem den hydraulischen Phasensteiler mit Fluid versorgenden Förderaggregat und mit einem den hydraulischen Phasensteiler steuernden 4/3 -Steuerventil, das als Proportional-Stromventil ausgeführt ist und die Ölmenge über den Hub des Ventils und die Öffhungsdauer dosiert. Nachteilig ist, dass der Phasensteiler ausschließlich mittels eines von einem Förderaggregat erzeugten Drucks verstellbar ist. Das Proportional-Stromventil benötigt vergleichsweise viel Bauraum, ist teuer und verbraucht kontinuierlich Strom. Die Steuerkennlinien von analog arbeitenden Proportionalventilen weisen aufgrund unvermeidbarer Reibungseffekte in den Ventilen unerwünschte Hystereseeigenschaften auf.A device for changing the rotational angle position of a camshaft relative to a crankshaft from DE 100 20 119 A1 is already known, comprising a hydraulic phase divider, a delivery unit supplying the hydraulic phase divider with fluid, and a 4/3 control valve controlling the hydraulic phase divider, which is designed as a proportional flow valve and dosed the amount of oil through the stroke of the valve and the Öffhungsdauer. The disadvantage is that the phase divider is adjustable exclusively by means of a pressure generated by a delivery unit. The proportional flow valve requires a comparatively large amount of space, is expensive and continuously consumes electricity. The control characteristics of analog proportional valves have undesirable hysteresis characteristics due to unavoidable frictional effects in the valves.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, dass der Phasensteiler sowohl über einen von dem Förderaggregat erzeugten hydraulischen Druck als auch von den Wechselmomenten der Nockenwelle verstellbar ist, indem anstatt eines 4/3 -Proportionalventils zwei schnell schaltbare 3/2-Schalt- bzw. Wegeventile zur Steuerung des Phasenstellers vorgesehen sind. Die Verstellung mittels der Nockenwellen- Wechselmomente wird auch als CTA (Cam TorqueThe device according to the invention with the characterizing features of the main claim has the advantage that the phase divider is adjustable both via a hydraulic pressure generated by the delivery unit and the alternating torques of the camshaft by instead of a 4/3 proportional valve two fast switchable 3/2 Switching or directional valves are provided for controlling the phaser. The adjustment by means of the camshaft alternating torques is also called CTA (Cam Torque
Actuation) und die Verstellung mittels des Förderaggregates als OPA (OiI Pressure Actuation) bezeichnet. Aus dem Motorbetrieb resultierende variable Nockenwellendrehzahlen und damit Nockenwellenwechselmomente auf der einen und der Wunsch nach variablen Verstellgeschwindigkeiten auf der anderen Seite zwingen zu hoher Flexibilität bezüglich der Schaltfrequenzen und Einschaltdauer der Schaltventile. Da die 3/2-Schaltventile mit hoher Frequenz verstellbar sind, wird die erfindungsgemäße Vorrichtung auch als pulsweitenmodulierendes Hydrauliksystem bezeichnet.Actuation) and the adjustment by means of the delivery unit referred to as OPA (OiI Pressure Actuation). From the engine operation resulting variable camshaft speeds and thus camshaft alternating torques on the one hand and the desire for variable adjustment speeds on the other side force too high flexibility in terms of switching frequencies and duty cycle of the switching valves. Since the 3/2-way valves with high Frequency are adjustable, the device according to the invention is also referred to as pulse width modulating hydraulic system.
Durch die erfindungsgemäße Ausführung werden die Herstellungskosten verringert, da die 3/2- Schaltventile kostengünstiger sind als ein 4/3 -Proportionalventil. Außerdem wird Bauraum eingespart. Des weiteren benötigen die 3/2-Schaltventile nur Strom für das Halten der einen Schaltstellung. Bei den 3/2-Schaltventilen treten keine Hystereseeffekte auf, so dass die Regelabweichung und die Schwingungsanfälligkeit geringer ist als im Stand der Technik.The inventive design, the manufacturing cost is reduced, since the 3 / 2- switching valves are cheaper than a 4/3 proportional valve. In addition, space is saved. Furthermore, the 3/2-way valves only need power for holding the one switching position. There are no hysteresis effects in the 3/2 switching valves, so that the control deviation and susceptibility to vibration are lower than in the prior art.
Bei einer CTA- Verstellung des Phasenstellers wird Motoröl zwischen den Arbeitskammern des Phasenstellers über die beiden 3/2-Schaltventile ausgetauscht, wobei kein von dem Förderaggregat gefordertes Motoröl benötigt wird, so dass die Motorölpumpe kleiner ausgelegt werden kann. Dies läßt sich besonders einfach bei geringen Motordrehzahlen realisieren. Gerade für diesen Betriebsbereich muss die Motorölpumpe dimensioniert werden, so dass diese kleiner ausgelegt werden kann. Bei hohen Drehzahlen fordert die Motorölpumpe hingegen genügend Öl, so dass der Nockenwellensteller einfacher im OPA-Modus betrieben wird. Durch die erfindungsgemäße Ausführung sind vorteilhaft beide Betriebsmodi - drehzahlabhängig - anwendbar, ein Umschalten zwischen den Betriebsmodi erfolgt durch die Auslegung der Ein- und Ausschaltzeitpunkte der Schaltventile.In a CTA adjustment of the phaser motor oil is exchanged between the working chambers of the phaser via the two 3/2-way valves, with no required by the delivery unit engine oil is needed, so that the engine oil pump can be made smaller. This can be realized particularly easily at low engine speeds. Especially for this operating range, the engine oil pump must be dimensioned so that it can be designed smaller. At high speeds, however, the engine oil pump requires enough oil, so that the camshaft actuator is easier to operate in OPA mode. Due to the design according to the invention, both modes of operation are advantageously applicable, depending on the speed. Switching between the operating modes takes place through the design of the switch-on and switch-off times of the switching valves.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Vorrichtung möglich.The measures listed in the dependent claims advantageous refinements and improvements of the main claim device are possible.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Die Zeichnung zeigt schematisch eine erfindungsgemäße Vorrichtung.The drawing shows schematically a device according to the invention.
Die Vorrichtung 1 dient der Verstellung der Drehwinkellage einer Nockenwelle 2 relativ zu einer Kurbelwelle 3 und weist einen allgemein bekannten hydraulischen Phasensteiler 4 auf. Die Nockenwelle 2 steuert das Öffnen und Schließen von Gaswechselventilen 6. Der hydraulische Phasensteiler 4 hat ein Stellergehäuse 4.1 mit einer Statorkammer 4.2 und einen in der Statorkammer 4.2 in einem vorbestimmten Winkelbereich drehbar angeordneten Rotor 4.3. Das Stellergehäuse 4.1 ist über ein Triebmittel mit der Kurbelwelle 3 und der Rotor 4.3 mit der Nockenwelle 2 mechanisch verbunden. Durch die Zwischenschaltung des Phasenstellers 4 zwischen der Kurbelwelle 3 und der Nockenwelle 2 wird eine variable Steuerung der Gaswechselventile 6 erreicht. Am Umfang der Statorkammer 4.2 sind Statorflügel 4.4 und am Rotor 4.3 Rotorflügel 4.5 ausgebildet. Der Rotor 4.3 ist mit seinen Rotorflügeln 4.5 im Winkelbereich zwischen den Statorflügeln 4.4 drehbar angeordnet. In der Statorkammer 4.2 sind in Umfangsrichtung gesehen zwischen den Statorflügeln 4.4 der Statorkammer 4.2 und den Rotorflügeln 4.5 des Rotors 4.3 Arbeitskammern 4.6 gebildet, die mit Fluid befüllt sind.The device 1 is used to adjust the rotational angle position of a camshaft 2 relative to a crankshaft 3 and has a well-known hydraulic phase divider 4. The Camshaft 2 controls the opening and closing of gas exchange valves 6. The hydraulic phase divider 4 has a stator housing 4.1 with a stator chamber 4.2 and a rotatably mounted in the stator chamber 4.2 in a predetermined angular range rotor 4.3. The actuator housing 4.1 is mechanically connected via a drive means with the crankshaft 3 and the rotor 4.3 with the camshaft 2. Through the interposition of the phaser 4 between the crankshaft 3 and the camshaft 2, a variable control of the gas exchange valves 6 is achieved. At the periphery of the stator chamber 4.2 Statorwing 4.4 and rotor 4.3 are formed on the rotor blades 4.5. The rotor 4.3 is rotatably arranged with its rotor blades 4.5 in the angular range between the stator blades 4.4. In the stator chamber 4.2 4.3 working chambers 4.6 are formed in the circumferential direction between the stator blades 4.4 of the stator chamber 4.2 and the rotor blades 4.5 of the rotor, which are filled with fluid.
Die Drehwinkellage bzw. der Phasenwinkel wird auf bekannte Art und Weise verstellt, indem die Rotorflügel 4.5 von einer Seite her durch Befüllen der entsprechenden Arbeitskammern 4.6 mit einem Druck beaufschlagt werden und die der anderen Seite der Rotorflügel 4.5 zugewandten Arbeitskammern 4.6 um ein entsprechendes Volumen entleert werden.The angular position or the phase angle is adjusted in a known manner by the rotor blades 4.5 are pressurized from one side by filling the corresponding working chambers 4.6 with a pressure and the other side of the rotor blades 4.5 facing working chambers are emptied 4.6 by a corresponding volume ,
Erfindungsgemäß ist vorgesehen, dass zwei 3/2-Schaltventile 7,8 zur Steuerung des Phasenstellers 4 vorgesehen sind. Die Druckbeaufschlagung der jeweiligen Arbeitskammern 4.6 des Phasenstellers 4 wird durch die 3/2-Schaltventile 7,8 gesteuert, die beispielsweise elektromagnetisch betätigt und pulsweitenmoduliert angesteuert werden. Der hydraulische Druck wird mittels eines Förderaggregates 9 erzeugt, das Fluid aus einem Vorratsbehälter 10 ansaugt und über die 3/2-Schaltventile 7,8 zum Phasensteller 4 hin fördert. Das Förderaggregat ist beispielsweise eine Motorölpumpe einer Brennkraftmaschine und der Vorratsbehälter 10 beispielsweise die Ölwanne der Brennkraftmaschine. Durch die erfindungsgemäße Ausführung ist der Phasensteller 4 sowohl über einen von dem Förderaggregat 9 erzeugten hydraulischen Druck (OPA- Verstellung) als auch von den Wechselmomenten der Nockenwelle (CTA- Verstellung) verstellbar.According to the invention, it is provided that two 3/2-way valves 7, 8 are provided for controlling the phaser 4. The pressurization of the respective working chambers 4.6 of the phaser 4 is controlled by the 3/2-way valves 7.8, which are for example actuated electromagnetically and controlled pulse width modulated. The hydraulic pressure is generated by means of a delivery unit 9, sucks the fluid from a reservoir 10 and promotes the phaser 4 through the 3/2-way valves 7.8. The delivery unit is for example an engine oil pump of an internal combustion engine and the reservoir 10, for example, the oil pan of the internal combustion engine. Due to the inventive design of the phaser 4 is adjustable both via a hydraulic pressure generated by the delivery unit 9 (OPA adjustment) and by the alternating torques of the camshaft (CTA adjustment).
Der Phasensteller 4 weist einen ersten Phasenstelleranschluss 11 zur Verstellung in die eine Drehrichtung und einen zweiten Phasenstelleranschluss 12 zur Verstellung in die andere Drehrichtung aufweist, wobei die 3/2-Schaltventile 7,8 jeweils drei Anschlüsse 7.1,7.2,7.3,8.1,8.2,8.3 und zwei Schaltstellungen 15.1,15.2, 16.1,16.2 haben. Einer der Anschlüsse 7.1 des ersten 3/2-Schaltventils 7 ist mit dem ersten Phasenstelleranschluss 11 und einer der Anschlüsse 8.1 des zweiten 3/2-Schaltventils 8 mit dem zweiten Phasenstelleranschluss 12 strömungsverbunden. - A -The phase adjuster 4 has a first phase adjuster connection 11 for adjustment in one direction of rotation and a second phase adjuster connection 12 for adjustment in the other direction of rotation, the 3/2-shift valves 7, 8 in each case three connections 7, 7, 7, 2, 7, 8, 8, 8, 2, 8.3 and have two switch positions 15.1, 15.2, 16.1, 16.2. One of the ports 7.1 of the first 3/2-way valve 7 is fluidly connected to the first phaser port 11 and one of the ports 8.1 of the second 3/2-way valve 8 to the second phaser port 12. - A -
Jedes der 3/2-Schaltventile 7,8 hat zwei dem Phasensteiler 4 abgewandte Anschlüsse 7.2,7.3,8.2,8.3, wobei der Anschluss 7.2 des ersten Schaltventils 7 über eine erste Verbindungsleitung 17 mit dem Anschluss 8.2 des zweiten Schaltventils 8 und der Anschluss 7.3 des ersten Schaltventils 7 über eine zweite Verbindungsleitung 18 mit dem Anschluss 8.3 des zweiten Schaltventils 8 verbunden ist. Die erste Verbindungsleitung 17 ist über eine das Förderaggregat 9 enthaltende Förderleitung 19 mit dem Vorratsbehälter 10 strömungsverbunden. Die zweite Verbindungsleitung 18 ist über eine Rücklaufleitung 20 mit dem Vorratsbehälter 10 strömungsverbunden. In der ersten Verbindungsleitung 17 ist den beiden Anschlüssen 7.2,8.2 jeweils ein Rückschlagventil 23,24 vorgeschaltet, das nur eine Strömungsrichtung vom Förderaggregat 9 in Richtung der Schaltventile 7,8 zulässt. In der Rücklaufleitung 20 ist ein Regelventil 25 vorgesehen, das Öl ab einem vorbestimmten Druck in der zweiten Verbindungsleitung 18 zurück in den Vorratsbehälter 10 ablaufen lässt.Each of the 3/2-way valves 7,8 has two connections 7,2,7,3,8,2,8.3 facing away from the phase divider 4, the connection 7.2 of the first switching valve 7 via a first connection line 17 to the connection 8.2 of the second switching valve 8 and the connection 7.3 of the first switching valve 7 is connected via a second connecting line 18 to the terminal 8.3 of the second switching valve 8. The first connecting line 17 is fluidly connected to the reservoir 10 via a delivery line 19 containing the delivery unit 9. The second connecting line 18 is flow-connected via a return line 20 to the reservoir 10. In the first connecting line 17, a check valve 23, 24, which allows only one flow direction from the delivery unit 9 in the direction of the switching valves 7, 8, is connected upstream of the two connections 7.2, 2.8. In the return line 20, a control valve 25 is provided, the oil can drain from a predetermined pressure in the second connecting line 18 back into the reservoir 10.
Für eine OPA- Verstellung des Rotors 4.3 bzw. der Nockenwelle 2 in Richtung „früh" bzw. „spät" werden die Schaltventile 7,8 derart geschaltet, dass die druckbeaufschlagte erste Verbindungsleitung 17 mit dem ersten Anschluss 11 des Phasenstellers 4 strömungsverbunden ist und der zweite Anschluss 12 des Phasenstellers 4 über die zweite Verbindungsleitung 18 und die Rücklaufleitung 20 mit dem Vorratsbehälter 10 strömungsverbunden ist oder umgekehrt. Dazu wird das Schaltventil 7 in die Schaltstellung 15.1 und das Schaltventil 8 in dieFor an OPA adjustment of the rotor 4.3 or the camshaft 2 in the "early" or "late" direction, the switching valves 7, 8 are switched such that the pressurized first connecting line 17 is flow-connected to the first port 11 of the phaser 4 and the second port 12 of the phaser 4 via the second connecting line 18 and the return line 20 to the reservoir 10 is fluidly connected or vice versa. For this purpose, the switching valve 7 in the switching position 15.1 and the switching valve 8 in the
Schaltstellung 16.2 bzw. das Schaltventil 7 in die Schaltstellung 15.2 und das Schaltventil 8 in die Schaltstellung 16.1 gebracht. Zum Halten der Position des Rotors 4.3 ist das Schaltventil 7 in der Schaltstellung 15.1 und das Schaltventil 8 in der Schaltstellung 16.1, wie es in der Zeichnung beispielhaft dargestellt ist. Für eine CTA- Verstellung des Rotors 4.3 bzw. der Nockenwelle 2 in Richtung „früh" bzw.Switching position 16.2 or the switching valve 7 in the switching position 15.2 and the switching valve 8 brought into the switching position 16.1. To hold the position of the rotor 4.3, the switching valve 7 in the switching position 15.1 and the switching valve 8 in the switching position 16.1, as shown by way of example in the drawing. For a CTA adjustment of the rotor 4.3 or the camshaft 2 in the direction of "early" or
„spät" werden die beiden 3/2-Schaltventile 7,8 derart geschaltet, dass das eine 3/2-Schaltventil 7,8 über die zweite Verbindungsleitung 18 mit dem anderen 3/2-Schaltventil 7,8 strömungsverbunden ist, so dass ein Ölaustausch zwischen den Arbeitskammern 4.6 möglich ist. Über die relativ zur jeweiligen Nockenwellenposition und damit relativ zur jeweiligen Wirkrichtung des Nockenwellenwechselmomentes phasenrichtige Ansteuerung der beiden"Late", the two 3/2-way valves 7.8 are switched such that the one 3/2-way valve 7.8 is fluidly connected via the second connecting line 18 with the other 3/2-way valve 7.8, so that a Oil exchange between the working chambers 4.6 is possible., Via the relative to the respective camshaft position and thus relative to the respective effective direction of the camshaft alternating torque phase-correct control of the two
Schaltventile 7,8 - in der gezeigten Art - wird die Verfahrrichtung im CTA-Modus eingestellt. Switching valves 7,8 - in the manner shown - the travel direction is set in CTA mode.

Claims

Ansprüche claims
1. Vorrichtung zum Verändern der Drehwinkellage einer Nockenwelle relativ zu einer Kurbelwelle, mit einem hydraulischen Phasensteiler und zumindest einem den hydraulischen Phasensteiler steuernden Steuerventil, dadurch gekennzeichnet, dass zwei 3/2-Schaltventile (7,8) zur Steuerung des Phasenstellers (4) vorgesehen sind.1. A device for changing the rotational angle position of a camshaft relative to a crankshaft, comprising a hydraulic phase divider and at least one hydraulic phase divider controlling the control valve, characterized in that two 3/2-switching valves (7,8) for controlling the phaser (4) is provided are.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Phasensteiler (4) einen ersten Anschluss (1.1) zur Verstellung in die eine Drehrichtung und einen zweiten Anschluss (1.2) zur Verstellung in die andere Drehrichtung aufweist, wobei die 3/2- Schaltventile (7,8) jeweils drei Anschlüsse (7.1,7.2,7.3,8.1,8.2,8.3) und zwei Schaltstellungen (15.1,15.2,16.1,16.2) haben und wobei einer der Anschlüsse (7.1) des ersten 3/2-Schaltventils (7) mit dem ersten Anschluss (1.1) des Phasenstellers (4) und einer der Anschlüsse (8.1) des zweiten 3/2-Schaltventils (8) mit dem zweiten Anschluss (1.2) des Phasenstellers (4) strömungsverbunden ist.2. Apparatus according to claim 1, characterized in that the phase divider (4) has a first connection (1.1) for adjustment in the one direction of rotation and a second connection (1.2) for adjustment in the other direction of rotation, wherein the 3 / 2- switching valves (7,8) each have three ports (7.1,7.2,7.3,8.1,8.2,8.3) and two shift positions (15.1,15.2,16.1,16.2) and wherein one of the ports (7.1) of the first 3/2-shift valve ( 7) is fluidly connected to the first port (1.1) of the phaser (4) and one of the ports (8.1) of the second 3/2-way valve (8) to the second port (1.2) of the phaser (4).
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Anschluss (7.2) des ersten Schaltventils (7) über eine erste Verbindungsleitung (17) mit dem Anschluss (8.2) des zweiten Schaltventils (8) und der Anschluss (7.3) des ersten Schaltventils (7) über eine zweite Verbindungsleitung (18) mit dem Anschluss (8.3) des zweiten Schaltventils (8) verbunden ist.3. Apparatus according to claim 2, characterized in that the connection (7.2) of the first switching valve (7) via a first connecting line (17) to the terminal (8.2) of the second switching valve (8) and the terminal (7.3) of the first switching valve (7) via a second connecting line (18) to the connection (8.3) of the second switching valve (8) is connected.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die erste Verbindungsleitung (17) über eine eine Motorölpumpe (9) enthaltende Förderleitung (19) mit einem Vorratsbehälter (10) strömungsverbunden ist.4. The device according to claim 3, characterized in that the first connecting line (17) via a motor oil pump (9) containing conveying line (19) with a reservoir (10) is fluidly connected.
5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass in der ersten5. Apparatus according to claim 3, characterized in that in the first
Verbindungsleitung (17) stromauf der Anschlüsse (7.2,8.2) der 3/2-Schaltventile (7,8) jeweils ein Rückschlagventil (23,24) vorgesehen ist.Connecting line (17) upstream of the terminals (7.2,8.2) of the 3/2-way valves (7,8) each have a check valve (23,24) is provided.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die zweite Verbindungsleitung (18) über eine Rücklaufleitung (20) in den Vorratsbehälter (10) mündet, wobei in der Rücklaufleitung (20) ein Regelventil (25) angeordnet ist. 6. The device according to claim 4, characterized in that the second connecting line (18) via a return line (20) into the reservoir (10) opens, wherein in the return line (20) a control valve (25) is arranged.
7. Verfahren zum Betrieb der Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die beiden 3/2-Schaltventile (7,8) für eine OPA- Verstellung derart geschaltet werden, dass die erste Verbindungsleitung (17) mit dem ersten Anschluss (11) des Phasenstellers (4) strömungsverbunden ist und der zweite Anschluss (12) des Phasenstellers (4) mit dem7. A method of operating the device according to claim 4, characterized in that the two 3/2-switching valves (7,8) are switched for an OPA adjustment such that the first connecting line (17) to the first terminal (11) the phase adjuster (4) is flow-connected and the second connection (12) of the phaser (4) with the
Vorratsbehälter (10) strömungsverbunden ist oder umgekehrt.Reservoir (10) is fluidly connected or vice versa.
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, die beiden 3/2-Schaltventile (7,8) für eine CTA- Verstellung derart geschaltet werden, dass das eine 3/2-Schaltventil (7,8) über die zweite Verbindungsleitung (18) mit dem anderen 3/2-Schaltventil (7,8) strömungsverbunden ist. 8. The method according to claim 7, characterized in that the two 3/2-switching valves (7,8) are switched for a CTA adjustment such that the one 3/2-way switching valve (7,8) via the second connecting line (18 ) is fluidly connected to the other 3/2-way valve (7, 8).
PCT/EP2008/067903 2008-06-17 2008-12-18 Device for changing the angle of rotation position of a camshaft WO2009152880A1 (en)

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