EP1370749A1 - Device for adjusting the angle of rotation of a camshaft of an internal combustion engine with regard to a drive gear - Google Patents

Device for adjusting the angle of rotation of a camshaft of an internal combustion engine with regard to a drive gear

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Publication number
EP1370749A1
EP1370749A1 EP02710050A EP02710050A EP1370749A1 EP 1370749 A1 EP1370749 A1 EP 1370749A1 EP 02710050 A EP02710050 A EP 02710050A EP 02710050 A EP02710050 A EP 02710050A EP 1370749 A1 EP1370749 A1 EP 1370749A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
inner part
wings
combustion engine
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
EP02710050A
Other languages
German (de)
French (fr)
Other versions
EP1370749B1 (en
Inventor
Gerold Sluka
Edwin Palesch
Alfred Trzmiel
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.)
Dr Ing HCF Porsche AG
Hilite Germany GmbH
Original Assignee
Dr Ing HCF Porsche AG
Hydraulik Ring 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 Dr Ing HCF Porsche AG, Hydraulik Ring GmbH filed Critical Dr Ing HCF Porsche AG
Publication of EP1370749A1 publication Critical patent/EP1370749A1/en
Application granted granted Critical
Publication of EP1370749B1 publication Critical patent/EP1370749B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01L1/3442—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 using hydraulic chambers with variable volume to transmit the rotating force

Definitions

  • the invention relates to a device for the relative rotation angle adjustment of a camshaft of an internal combustion engine to a drive wheel according to the preamble of the main claim.
  • a so-called vane cell camshaft adjuster in which recesses are provided on the end faces of the rotor blades, in which roller-shaped rolling elements are accommodated. These rolling elements serve to reduce the frictional forces between the drive wheel and the impeller (rotor), the rolling elements being supported on one side directly in the recess and on the other side directly on the inner wall of the drive wheel.
  • the pressurization to the two pressure chambers provided in one side wall of the rotor blades is advantageously carried out via an opening in each case, which is connected to the pressure chambers adjoining the blades.
  • the pressure oil supply for adjusting the inner part or rotor can thus be used simultaneously for pressurizing the pressure chambers provided in the rotor blades. Additional pressure lines for supplying the pressure chambers are therefore not necessary.
  • FIG. 1 shows a section through a camshaft adjuster
  • FIG. 2 shows a section along the line II-II in FIG. 1
  • FIG. 3 shows an enlarged view of a rotor blade
  • FIG. 4 shows a section along the line IV-IV in FIG. 3 and
  • Fig. 5 is a view of the end face of a rotor blade in the assembled state of the camshaft adjuster s.
  • the camshaft of an internal combustion engine is schematically indicated at 2, at the free end of which an inner part, hereinafter referred to as rotor 4, of an adjusting unit 5 is arranged.
  • the rotor 4 is provided with five radially arranged vanes 6a to 6e, which start from a hub S of the rotor 4.
  • the rotor 4 is in the area of its blades 6a to 6e by a cellular wheel 10 comprises, which is provided with five inwardly projecting radial webs 12a to 12e.
  • the cell wheel 10 forming the stator of the adjusting unit 5 is closed on its end face facing the camshaft 2 by a chain wheel 14 which is rotatably and sealingly guided on the hub 8 of the rotor 4.
  • the sprocket 14 serves as a drive for the camshaft 2, which takes place, for example, via a drive chain connected to the crankshaft.
  • the opposite end face of the cellular wheel 10 is closed by a disk 16, the chain wheel 14 and the disk 16 being firmly connected to the cellular wheel 10 by means of fastening screws 18.
  • the through holes 20 provided in the webs 12a to 12e in the cellular wheel 10 serve to receive or guide these fastening screws 18.
  • Five webs delimited in the axial direction by the chain wheel 14 and the disk 16 are formed by the webs 12a to 12e of the cellular wheel 10, which are divided into two pressure chambers 22a to 22e and 24a to 24e by the blades 6a to 6e of the rotor 4.
  • the rotor 4 and the cell wheel 10 rotatably guided on it are attached to the camshaft 2 by means of a cylinder screw (not shown).
  • the hub 10 has a central bore 26 for receiving the cylinder screw.
  • a signal transmitter disk 30 is attached to the outside of the rotor 4, with the aid of which the rotational position of the camshaft 2 relative to the crankshaft can be detected.
  • the five axial bores 32a to 32e arranged in the hub 8 of the rotor 4 represent part of the oil supply channels for the pressure chambers 24a to 24e.
  • the pressure chambers 22a to 22e are also provided with hydraulic oil via radial bores (not shown) arranged in the hub 8 provided.
  • the hydraulic oil supply for the two pressure chambers 22a to 22e and 24a to 24e takes place via a camshaft bearing 34, to which corresponding control lines for the oil pressure supply to the adjusting unit 5 are connected.
  • the way in which the oil is supplied to the pressure chambers 22a to 22e or 24a to 24e is, for. B. from DE 199 39 711 Cl known, so that the exact design of the oil supply channels to the pressure chambers is not discussed further.
  • the side wall 36 adjoining the chain wheel 14 and the side wall 38 adjoining the disk 16 of the wings 6a to 6e each have two recesses 40 and 42 forming a pressure chamber, both of which are separated from one another by a central web 44.
  • the pressure chambers 40 are connected to the pressure chambers 22a to 22e via a channel 46 and the pressure chambers 42 are connected to the pressure chambers 24a to 24e via a channel 48.
  • the two chambers 40 and 42 formed on one side surface of each of the wings 6a to 6e extend essentially over the entire side surface.
  • a pressure cushion is alternately built up in the pressure chambers 40 and 42, which contributes to reducing the friction between the wings 6a to 6e and the adjacent sprocket 14 and side cover 16.
  • the pressure chambers 22a to 22e are acted upon by hydraulic oil. Via the pressure chambers 22a to 22e, the hydraulic oil passes through the channels 46 into the pressure chambers 40, in which a corresponding pressure cushion is built up.
  • the pressure spaces 24a to 24e are acted upon in an analogous manner with hydraulic oil.
  • the hydraulic oil passes through the pressure chambers 24a to 24e and the channels 48 into the pressure chambers 42, so that a friction-reducing pressure cushion is also formed in the side region of the wings 6a to 6e in this adjustment direction.

Abstract

The invention relates to a device for adjusting the angle of rotation of a camshaft of an internal combustion engine with regard to a drive gear. Said device is provided with an inner part (4), which is connected in a rotationally fixed manner to the camshaft (2) and which has connecting elements or vanes (6a to 6e) that run in an at least approximately radial manner, and with a driven cell wheel (10). The cell wheel has a number of cells, which are distributed over the circumference and delimited by connecting elements (12a to 12e). In addition, the cells are respectively subdivided into two pressure spaces (22a to 22e and 24a to 24e) by the connecting elements or vanes (6a to 6e) of the inner part (4), which are guided inside the cells while executing angular movements. When the pressure spaces are hydraulically pressurized or relieved from pressure via control lines, the camshaft can be rotated in relation to the cell wheel (10) between two end positions via the connecting elements or vanes. The inner part (4) is laterally delimited by two cover elements (14, 16) that are joined to the cell wheel. The aim of the invention is to reduce the friction between the blades (6a to 6b) of the inner part (4) and the cover elements (14, 16) in the lateral walls (38, 38) of the blades (6a to 6e), said lateral walls pointing toward the cover elements (14, 16). To this end, recesses (40, 42) that form spaces are provided, which are at least partially subjected to the action of hydraulic fluid when the internal combustion engine is in operation.

Description

Vorrichtung zur relativen Drehwinkelverstellung einer Nockenwelle einer Brennkraftmaschine zu einem Antriebsrad Device for the relative rotation angle adjustment of a camshaft of an internal combustion engine to a drive wheel
Die Erfindung betrifft eine Vorrichtung zur relativen Drehwinkelverstellung einer Nockenwelle einer Brennkraftmaschine zu einem Antriebsrad nach der Gattung des Hauptanspruchs.The invention relates to a device for the relative rotation angle adjustment of a camshaft of an internal combustion engine to a drive wheel according to the preamble of the main claim.
Aus der DE 197 45 908 AI ist ein sog. Flügelzellen - Nockenwellenversteller bekannt, bei dem an den Stirnseiten der Rotorflügel Ausnehmungen vorgesehen sind, in denen rollenförmige Wälzkörper Aufnahme finden. Diese Wälzkörper dienen zur Reduzierung der Reibkräfte zwischen dem Antriebsrad und dem Flügelrad (Rotor), wobei sich die Wälzkörper auf der einen Seite direkt in der Ausnehmung und auf der anderen Seite direkt an der Innenwand des Antriebsrades abstützen. Darüber hinaus wird in einer abgewandelten Ausführungsform vorgeschlagen, einen zur freien Stirnseite des Rotorflügels führenden Kanal mit Drucköl zu beaufschlagen, um ebenfalls die Reibkräfte zwischen Antriebsrad und Flügelrad zu reduzieren.From DE 197 45 908 AI, a so-called vane cell camshaft adjuster is known, in which recesses are provided on the end faces of the rotor blades, in which roller-shaped rolling elements are accommodated. These rolling elements serve to reduce the frictional forces between the drive wheel and the impeller (rotor), the rolling elements being supported on one side directly in the recess and on the other side directly on the inner wall of the drive wheel. In addition, it is proposed in a modified embodiment to apply pressure oil to a channel leading to the free end face of the rotor blade in order to likewise reduce the frictional forces between the drive wheel and the impeller.
Es ist Aufgabe der Erfindung, eine gattungsgemäße Vorrichtung zur relativen Drehwinkelverstellung einer Nockenwelle zu ihrem Antriebsrad dahingehend zu verbessern, dass die zwischen Antriebsrad und Flügelrad erzeugte Reibleistung weiter reduziert ist.It is an object of the invention to improve a generic device for the relative rotation angle adjustment of a camshaft to its drive wheel in such a way that the friction generated between the drive wheel and the impeller is further reduced.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Hauptanspruchs gelöst.This object is achieved by the features of the main claim.
Durch die in den Seitenwänden der Rotorflügel vorgesehenen Druckkammern kann aufgrund der damit reduzierten Reibflächen der Reibwiderstand zwischen Antriebsrad und Flügelrad (Rotor) erheblich reduziert werden. Damit wird eine schnelle, verschleißarme und sichere Verstellung der gewünschten Einlass- und Auslasszeiten für die Ventile der Brennkraftmaschine erreicht. Weitere Vorteile und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Due to the pressure chambers provided in the side walls of the rotor blades, the frictional resistance between the drive wheel and the impeller (rotor) can be considerably reduced due to the reduced friction surfaces. This enables the desired inlet and outlet times for the valves of the internal combustion engine to be adjusted quickly, with little wear and tear. Further advantages and advantageous developments of the invention result from the subclaims and the description.
Die Druckbeaufschlagung zu den beiden in einer Seitenwand der Rotorflügel vorgesehenen Druckkammern erfolgt in vorteilhafter Weise über jeweils ein Öffnung, die mit den an den Flügeln angrenzenden Druckräumen in Verbindung steht. Damit kann die Druckölzufuhr zur Verstellung des Innenteils bzw. Rotors gleichzeitig zur Druckbeaufschlagung der in den Rotorflügeln vorgesehenen Druckkammern genutzt werden. Zusätzliche Druckleitungen für die Versorgung der Druckkammern sind daher nicht erforderlich.The pressurization to the two pressure chambers provided in one side wall of the rotor blades is advantageously carried out via an opening in each case, which is connected to the pressure chambers adjoining the blades. The pressure oil supply for adjusting the inner part or rotor can thus be used simultaneously for pressurizing the pressure chambers provided in the rotor blades. Additional pressure lines for supplying the pressure chambers are therefore not necessary.
Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert.An embodiment of the invention is explained in more detail in the following description and drawing.
Es zeigen:Show it:
Fig. 1 einen Schnitt durch einen Nockenwellenversteller, Fig. 2 eine Schnitt entlang der Linie II - II in Fig. 1, Fig. 3 eine vergrößerte Darstellung eines Rotorflügels, Fig. 4 einen Schnitt entlang der Linie IV - IV in Fig. 3 und1 shows a section through a camshaft adjuster, FIG. 2 shows a section along the line II-II in FIG. 1, FIG. 3 shows an enlarged view of a rotor blade, FIG. 4 shows a section along the line IV-IV in FIG. 3 and
Fig. 5 eine Ansicht auf die Stirnseite eines Rotorflügels im zusammengebauten Zustand des Nockenwellenversteller s.Fig. 5 is a view of the end face of a rotor blade in the assembled state of the camshaft adjuster s.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In der Zeichnung ist mit 2 schematisch die Nockenwelle einer Brennkraftmaschine angedeutet, an deren freien Ende ein Innenteil, im folgenden als Rotor 4 bezeichnet, einer Verstelleinheit 5 angeordnet ist. Der Rotor 4 ist in diesem Ausführungsbeispiel mit fünf radial angeordneten Flügeln 6a bis 6e versehen, die von einer Nabe S des Rotors 4 ausgehen. Der Rotor 4 wird im Bereich seiner Flügel 6a bis 6e von einem Zellenrad 10 umfasst, das mit fünf nach innen ragenden radialen Stegen 12a bis 12e versehen ist. Das den Stator der Verstelleinheit 5 bildende Zellenrad 10 wird auf seiner der Nockenwelle 2 zugewandten Stirnseite von einem Kettenrad 14 abgeschlossen, das drehbeweglich und dichtend auf der Nabe 8 des Rotors 4 geführt ist. Das Kettenrad 14 dient als Antrieb für die Nockenwelle 2, der beispielsweise über eine mit der Kurbelwelle verbundene Antriebskette erfolgt. Die gegenüberliegende Stirnseite des Zellenrades 10 wird von einer Scheibe 16 verschlossen, wobei das Kettenrad 14 und die Scheibe 16 über Befestigungsschrauben 18 mit dem Zellenrad 10 fest verbunden sind. Die in den Stegen 12a bis 12e im Zellenrad 10 vorgesehenen Durchgangsbohrungen 20 dienen der Aufnahme bzw. der Führung dieser Befestigungsschrauben 18. Durch die Stege 12a bis 12e des Zellenrades 10 werden fünf durch das Kettenrad 14 und die Scheibe 16 in axialer Richtung begrenzte Zellen ausgebildet, die durch die Flügel 6a bis 6e des Rotors 4 in jeweils zwei Druckräume 22a bis 22e bzw. 24a bis 24e unterteilt sind. Der Rotor 4 und das auf diesem drehbar geführte Zellenrad 10 sind mit Hilfe einer Zylinderschraube (nicht dargestellt) an der Nockenwelle 2 befestigt. Zur Aufnahme der Zylinderschraube weist die Nabe 10 eine zentrale Bohrung 26 auf.In the drawing, the camshaft of an internal combustion engine is schematically indicated at 2, at the free end of which an inner part, hereinafter referred to as rotor 4, of an adjusting unit 5 is arranged. In this exemplary embodiment, the rotor 4 is provided with five radially arranged vanes 6a to 6e, which start from a hub S of the rotor 4. The rotor 4 is in the area of its blades 6a to 6e by a cellular wheel 10 comprises, which is provided with five inwardly projecting radial webs 12a to 12e. The cell wheel 10 forming the stator of the adjusting unit 5 is closed on its end face facing the camshaft 2 by a chain wheel 14 which is rotatably and sealingly guided on the hub 8 of the rotor 4. The sprocket 14 serves as a drive for the camshaft 2, which takes place, for example, via a drive chain connected to the crankshaft. The opposite end face of the cellular wheel 10 is closed by a disk 16, the chain wheel 14 and the disk 16 being firmly connected to the cellular wheel 10 by means of fastening screws 18. The through holes 20 provided in the webs 12a to 12e in the cellular wheel 10 serve to receive or guide these fastening screws 18. Five webs delimited in the axial direction by the chain wheel 14 and the disk 16 are formed by the webs 12a to 12e of the cellular wheel 10, which are divided into two pressure chambers 22a to 22e and 24a to 24e by the blades 6a to 6e of the rotor 4. The rotor 4 and the cell wheel 10 rotatably guided on it are attached to the camshaft 2 by means of a cylinder screw (not shown). The hub 10 has a central bore 26 for receiving the cylinder screw.
Mit Hilfe von zwei Spannstiften 28 und der Zylinderschraube ist an der Außenseite des Rotors 4 eine Signalgeberscheibe 30 befestigt, mit deren Hilfe die Drehlageposition der Nockenwelle 2 gegenüber der Kurbelwelle erfasst werden kann. Die fünf in der Nabe 8 des Rotors 4 angeordneten axialen Bohrungen 32a bis 32e stellen einen Teil der Ölversorgungskanäle für die Druckräume 24a bis 24e dar. Die Druckräume 22a bis 22e werden ebenfalls über in der Nabe 8 angeordnete radial verlaufenden Bohrungen (nicht dargestellt) mit Hydrauliköl versorgt. Die Hydraulikölversorgung für die beiden Druckräume 22a bis 22e bzw. 24a bis 24e erfolgt über eine Nockenwellenlager 34, an dem entsprechende Steuerleitungen für die Öldruckversorgung der Verstelleinheit 5 angeschlossen sind. Die Art und Weise, wie die Ölzufuhr zu den Druckräumen 22a bis 22e bzw. 24a bis 24e erfolgt, ist z. B. aus der DE 199 39 711 Cl bekannt, so dass auf die genaue Ausbildung der Ölzufuhrkanäle zu den Druckräumen nicht weiter eingegangen wird. Die an das Kettenrad 14 angrenzende Seitenwand 36 und die an die Scheibe 16 angrenzende Seitenwand 38 der Flügel 6a bis 6e weisen jeweils zwei eine Druckkammer bildende Aussparung 40 und 42 auf, die beide durch einen Mittelsteg 44 voneinander getrennt sind. Die Druckkammern 40 stehen über einen Kanal 46 mit den Druckräumen 22a bis 22e und die Druckkammern 42 über einen Kanal 48 mit den Druckräumen 24a bis 24e in Verbindung. Die beiden auf jeweils einer Seitenfläche der Flügel 6a bis 6e ausgebildeten Kammern 40 und 42 erstrecken sich im wesentlichen über die gesamte Seitenfläche.With the help of two dowel pins 28 and the cylinder screw, a signal transmitter disk 30 is attached to the outside of the rotor 4, with the aid of which the rotational position of the camshaft 2 relative to the crankshaft can be detected. The five axial bores 32a to 32e arranged in the hub 8 of the rotor 4 represent part of the oil supply channels for the pressure chambers 24a to 24e. The pressure chambers 22a to 22e are also provided with hydraulic oil via radial bores (not shown) arranged in the hub 8 provided. The hydraulic oil supply for the two pressure chambers 22a to 22e and 24a to 24e takes place via a camshaft bearing 34, to which corresponding control lines for the oil pressure supply to the adjusting unit 5 are connected. The way in which the oil is supplied to the pressure chambers 22a to 22e or 24a to 24e is, for. B. from DE 199 39 711 Cl known, so that the exact design of the oil supply channels to the pressure chambers is not discussed further. The side wall 36 adjoining the chain wheel 14 and the side wall 38 adjoining the disk 16 of the wings 6a to 6e each have two recesses 40 and 42 forming a pressure chamber, both of which are separated from one another by a central web 44. The pressure chambers 40 are connected to the pressure chambers 22a to 22e via a channel 46 and the pressure chambers 42 are connected to the pressure chambers 24a to 24e via a channel 48. The two chambers 40 and 42 formed on one side surface of each of the wings 6a to 6e extend essentially over the entire side surface.
In Abhängigkeit von der Verstellrichtung wird wechselseitig in den Druckkammern 40 bzw. 42 ein Druckpolster aufgebaut, das zur Reduzierung der Reibung zwischen den Flügeln 6a bis 6e und den daran angrenzenden Kettenrad 14 und Seitendeckel 16 beiträgt. Soll der Rotor 4 gegenüber dem Zellenrad 10 im Uhrzeigersinn (siehe Fig. 1) verstellt werden, so werden die Druckräume 22a bis 22e mit Hydrauliköl beaufschlagt. Über die Druckräume 22a bis 22e gelangt das Hydrauliköl über die Kanäle 46 in die Druckkammern 40, in denen ein entsprechendes Druckpolster aufgebaut wird. Soll der Rotor 4 relativ zum Zellenrad 10 entgegen dem Uhrzeigersinn verstellt werden, so werden in analoger Weise die Druckräume 24a bis 24e mit Hydrauliköl beaufschlagt. Dabei gelangt das Hydrauliköl über die Druckräume 24a bis 24e und die Kanäle 48 in die Druckkammern 42, so dass auch in dieser Verstellrichtung im Seitenbereich der Flügel 6a bis 6e ein reibungsminderndes Druckpolster ausgebildet ist. Depending on the direction of adjustment, a pressure cushion is alternately built up in the pressure chambers 40 and 42, which contributes to reducing the friction between the wings 6a to 6e and the adjacent sprocket 14 and side cover 16. If the rotor 4 is to be adjusted clockwise relative to the cellular wheel 10 (see FIG. 1), the pressure chambers 22a to 22e are acted upon by hydraulic oil. Via the pressure chambers 22a to 22e, the hydraulic oil passes through the channels 46 into the pressure chambers 40, in which a corresponding pressure cushion is built up. If the rotor 4 is to be adjusted counterclockwise relative to the cell wheel 10, the pressure spaces 24a to 24e are acted upon in an analogous manner with hydraulic oil. The hydraulic oil passes through the pressure chambers 24a to 24e and the channels 48 into the pressure chambers 42, so that a friction-reducing pressure cushion is also formed in the side region of the wings 6a to 6e in this adjustment direction.

Claims

Patentansprüche claims
1. Vorrichtung zur relativen Drehwinkelverstellung einer Nockenwelle einer1. Device for the relative rotation angle adjustment of a camshaft
Brennkraftmaschine zu einem Antriebsrad, mit einem drehfest mit der Nockenwelle verbundenen Innenteil (4), das zumindest annähernd radial verlaufende Stege oder Flügel (6a bis 6e) aufweist, und mit einem angetriebenen Zellenrad (10), das mehrere über den Umfang verteilte, durch Stege (12a bis 12e) begrenzte Zellen aufweist, die von den darin winkelbeweglich geführten Stegen oder Flügeln (6a bis 6e) des Innenteils (4) in jeweils zwei Druckräume (22a bis 22e bzw. 24a bis 24e) unterteilt sind, bei deren hydraulischer Druckbeaufschlagung bzw. Druckentlastung über Steuerleitungen die Nockenwelle über die Stege oder Flügel zwischen zwei Endstellungen relativ zum Zellenrad (10) verdrehbar ist, wobei das Innenteil (4) seitlich durch zwei mit dem Zellenrad verbundene Deckelelemente (14, 16) begrenzt ist, dadurch gekennzeichnet, dass zur Reduzierung der Reibung zwischen den Flügeln (6a bis 6e) des Innenteils (4) und den Deckelelementen (14, 16) in den zu denInternal combustion engine to a drive wheel, with an inner part (4) which is connected in a rotationally fixed manner to the camshaft and which has at least approximately radially extending webs or wings (6a to 6e), and with a driven cellular wheel (10) which has a plurality distributed over the circumference by webs (12a to 12e) has limited cells, each of which is divided into two pressure chambers (22a to 22e or 24a to 24e) by the webs or wings (6a to 6e) of the inner part (4) which are guided in an angular manner, the hydraulic pressurization or Relief of pressure via control lines, the camshaft can be rotated via the webs or wings between two end positions relative to the cellular wheel (10), the inner part (4) being limited laterally by two cover elements (14, 16) connected to the cellular wheel, characterized in that Reduction of the friction between the wings (6a to 6e) of the inner part (4) and the cover elements (14, 16) in the to
Deckelelementen (14, 16) gerichteten Seitenwänden (36, 38) der Flügel (6a bis 6e) Kammern bildende Aussparungen (40, 42) vorgesehen sind, die im Betrieb der Brennkraftmaschine mindestens teilweise mit Hydrauliköl beaufschlagt sind.Cover elements (14, 16) facing side walls (36, 38) of the wings (6a to 6e) are provided with recesses (40, 42) forming chambers, which are at least partially acted upon by hydraulic oil during operation of the internal combustion engine.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass in mindestens einer der beiden Seitenwände (36, 38) der Flügel (6a bis 6e) zwei separate Kammern (40, 42) vorgesehen sind, die über jeweils eine Öffnung (46, 48) mit den an den Flügeln (6a bis 6e) angrenzenden Druckräumen (22a bis 22e bzw. 24a bis 24e) in Verbindung stehen. 2. Device according to claim 1, characterized in that in at least one of the two side walls (36, 38) of the wing (6a to 6e) two separate chambers (40, 42) are provided which each have an opening (46, 48) are connected to the pressure chambers (22a to 22e or 24a to 24e) adjoining the wings (6a to 6e).
EP02710050A 2001-03-14 2002-01-30 Device for adjusting the angle of rotation of a camshaft of an internal combustion engine with regard to a drive gear Expired - Lifetime EP1370749B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10112206A DE10112206A1 (en) 2001-03-14 2001-03-14 Device for the relative rotation angle adjustment of a camshaft of an internal combustion engine to a drive wheel
DE10112206 2001-03-14
PCT/EP2002/000927 WO2002073008A1 (en) 2001-03-14 2002-01-30 Device for adjusting the angle of rotation of a camshaft of an internal combustion engine with regard to a drive gear

Publications (2)

Publication Number Publication Date
EP1370749A1 true EP1370749A1 (en) 2003-12-17
EP1370749B1 EP1370749B1 (en) 2008-02-13

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EP02710050A Expired - Lifetime EP1370749B1 (en) 2001-03-14 2002-01-30 Device for adjusting the angle of rotation of a camshaft of an internal combustion engine with regard to a drive gear

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US (1) US6668777B2 (en)
EP (1) EP1370749B1 (en)
JP (1) JP2004518868A (en)
DE (2) DE10112206A1 (en)
WO (1) WO2002073008A1 (en)

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EP1370749B1 (en) 2008-02-13
DE50211670D1 (en) 2008-03-27
JP2004518868A (en) 2004-06-24
US20030106512A1 (en) 2003-06-12
WO2002073008A1 (en) 2002-09-19
US6668777B2 (en) 2003-12-30
DE10112206A1 (en) 2002-09-26

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