EP1803904A2 - Camshaft - Google Patents

Camshaft Download PDF

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Publication number
EP1803904A2
EP1803904A2 EP06125818A EP06125818A EP1803904A2 EP 1803904 A2 EP1803904 A2 EP 1803904A2 EP 06125818 A EP06125818 A EP 06125818A EP 06125818 A EP06125818 A EP 06125818A EP 1803904 A2 EP1803904 A2 EP 1803904A2
Authority
EP
European Patent Office
Prior art keywords
shafts
camshaft
shaft
drive
swash plate
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
EP06125818A
Other languages
German (de)
French (fr)
Other versions
EP1803904A3 (en
EP1803904B1 (en
Inventor
Martin Lechner
Oliver Fritz
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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Publication date
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Publication of EP1803904A2 publication Critical patent/EP1803904A2/en
Publication of EP1803904A3 publication Critical patent/EP1803904A3/en
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Publication of EP1803904B1 publication Critical patent/EP1803904B1/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
    • 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
    • F01L1/34413—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 composite camshafts, e.g. with cams being able to move relative to the camshaft
    • 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
    • F01L1/352—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 bevel or epicyclic 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
    • F01L1/356—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 making the angular relationship oscillate, e.g. non-homokinetic drive
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • 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
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F01L2001/34493—Dual independent phasing system [DIPS]

Definitions

  • the invention relates to a camshaft for in particular an actuation of the gas exchange valves of an internal combustion engine according to the preamble of patent claim 1.
  • Such a camshaft is known, for example EP 0 582 846 B1 and US 6,725,817 , In these camshafts, the two actuators are hydraulically actuated.
  • Such hydraulic drives operate on the one hand relatively inertially and, on the other hand, are temperature-dependent with respect to their control values. In addition, larger adjustment angles are difficult and not achievable with the aforementioned special drive designs.
  • the invention is concerned with the problem of providing a speedy, with respect to their positioning accuracy independent actuators in a generic camshaft with which in particular practically arbitrarily large adjustment angle are easily possible.
  • This problem is solved by the application of a for adjusting the camshaft itself already DE 102 22 475 A1 known swash plate drive in a special embodiment according to the characterizing features of patent claim 1.
  • the invention is based on the general idea to convert a known in itself for the rotational angle adjustment of a one-piece camshaft swashplate actuator in a simple manner in a double actuator, with the constructively simple and safe way arbitrary rotational angle adjustments of two coaxial nested waves can be achieved, the form a common camshaft, in each case connected to the one and the other of the two shafts cam on the one hand against each other navwinkelver Issue, further on the other hand at the same time also a common rotational angle adjustment of both shafts is possible.
  • the drivers of both swashplates engage in a common ring formed on one of the two shaft ends.
  • the drivers are displaceable in the direction of the common axis of the two shafts within the ring.
  • both swash plate bearings rotate about a common axis of both shafts.
  • both actuators comprise coaxial with one another, acting on the swash plate bearing drive shafts.
  • the inventive device with two swashplates comprehensive actuators allows any appropriate adjustments of the two shafts against each other and / or together with respect to the main drive with a corresponding electronic control device.
  • a particular advantage of an actuator with a swash plate is to be able to achieve very high gear ratios in a simple manner.
  • the basic principle of a swash plate drive in the form of a gear transmission is that the 2ähneterrorism between the sprocket of the swash plate and the ring gear in which the swash plate meshes, only by a small number of teeth, which may be one in the extreme case, different.
  • Such swash plate gears are known per se in the prior art, which is why their operating principle and structural design need not be explained in detail here. Further information regarding a camshaft swash plate adjustment drive may, for example, already mentioned above DE 102 22 475 A1 be removed.
  • a camshaft consists of coaxially superimposed shafts, namely a first shaft 1 as an inner shaft and a second shaft 2 as an outer shaft. Of these two shafts 1, 2, only the sections are shown at one end.
  • the consisting of the two shafts 1 and 2 camshaft has first cam, which are fixedly connected to the first shaft and second cam which are connected to the second shaft, so that these cams can be rotated by a rotation angle adjustment of the two shafts 1, 2 against each other.
  • the cams and their attachment to the two shafts 1, 2 are not shown in the drawing.
  • the two shafts 1, 2 are each connected to a separately operable actuator namely the first shaft 1 with a first actuator 3 and the second shaft 2 with a second actuator 4. Both actuators 3, 4 are designed as swash plate drives.
  • a diameter-moderately stepped ring 5 is fixedly connected, while the fixed connection is made in the small-diameter ring section, while the larger-diameter section encloses the two actuators 3, 4, of which this section is one below is more detailed component.
  • Each of the two actuators 3, 4 consists of the following components.
  • a swash plate 3 ', 4' rotatably supports on a swash plate bearing 3 ''; 4 ''.
  • the swash plate bearings 3 ''; 4 are each driven via an actuating drive shaft, namely a first and second actuating drive shaft 3 '' ', 4' ''.
  • the first drive shaft 3 '' ' coaxially supports within the second drive shaft 4' '' designed as a hollow shaft.
  • the first swash plate bearing 3 "rotatably supports on a fixedly connected to the first shaft 1 first axis 6. Fixedly connected to the first shaft 1 is an annular disc. 7
  • drivers 3 IV ; 4 IV provided, which protrude radially outward.
  • These drivers 3 IV ; 4 IV engage in a longitudinal groove 8 in the inner periphery of the ring 5 in its large diameter portion, said longitudinal groove parallel to the common axis of the first and second shaft 1, 2 extends.
  • a corresponding number of longitudinal grooves 8 is provided in your radially outer side region.
  • the two swash plates 3 ', 4' each with a ring gear namely a first and second ring gear 3 V ; 4 V provided.
  • These sprockets 3 V ; 4 V engage in each assigned sprockets.
  • In the first actuator 3, such an associated sprocket 7 ' is located on the annular disk 7.
  • the second ring gear 4 V of the second swash plate 4 ' meshes in a ring gear 9' of an annular sleeve 9.
  • the annular sleeve 9 is fixedly connected to a gear 10 of a camshaft main drive.
  • This main drive has as a drive source, a crankshaft of an internal combustion engine, of which the gear 10 is driven by a drive chain, not shown.
  • the second swash plate bearing 4 '' is rotatably mounted.
  • the two adjusting drive shafts 3 '' 'and 4' '' are part of two electric servomotors, which are not shown in the drawing.
  • the adjustable camshaft drive works as follows.
  • both shafts 1, 2 are rotationally adjusted with respect to the gearwheel 10 at the same rotational angle.
  • the first actuator 3 For a mutual adjustment of the shafts 1, 2, the first actuator 3 provides.
  • the shafts 1 and 2 can be rotational angle adjusted in a simple manner by a corresponding control of the actuators 3, 4 against each other and together with respect to the engaging via the gear 10 main drive.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

The camshaft has two coaxially mounted shafts (1,2) rotatable inside with respect to one another. The cams are fixedly attached to the shafts. A main camshaft drive acts on both the shafts. A device adjusts the angle of rotation of the shafts with respect to one another by an actuating drive (3) and adjusts the angle of rotation of the shafts jointly by actuating drive (4). The actuating device has swash plates (3',4') mounted rotatably on a swash bearing (3",4").

Description

Die Erfindung betrifft eine Nockenwelle für insbesondere eine Betätigung der Gaswechselventile eines Verbrennungsmotors nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a camshaft for in particular an actuation of the gas exchange valves of an internal combustion engine according to the preamble of patent claim 1.

Eine solche Nockenwelle ist bekannt aus beispielsweise EP 0 582 846 B1 und US 6,725,817 . Bei diesen Nockenwellen sind die beiden Stellantriebe hydraulisch betätigt. Derartige Hydraulikantriebe arbeiten zum einen relativ reaktionsträge und sind zum anderen bezüglich ihrer Stellwerte temperaturabhängig. Darüber hinaus sind größere Verstellwinkel schwierig und bei den vorstehenden genannten speziellen Antriebsausführungen gar nicht erreichbar.Such a camshaft is known, for example EP 0 582 846 B1 and US 6,725,817 , In these camshafts, the two actuators are hydraulically actuated. Such hydraulic drives operate on the one hand relatively inertially and, on the other hand, are temperature-dependent with respect to their control values. In addition, larger adjustment angles are difficult and not achievable with the aforementioned special drive designs.

Die Erfindung beschäftigt sich mit dem Problem, bei einer gattungsgemäßen Nockenwelle reaktionsschnelle, bezüglich ihrer Stellgenauigkeit temperaturunabhängige Stellantriebe zu schaffen, mit denen insbesondere praktisch beliebig große Stellwinkel einfach möglich sind. Gelöst wird dieses Problem durch die Anwendung eines zur Verstellung von Nockenwellen an sich bereits aus DE 102 22 475 A1 bekannten Taumelscheibenantriebes in einer speziellen Ausführung nach den kennzeichnenden Merkmalen des Patentanspruchs 1.The invention is concerned with the problem of providing a speedy, with respect to their positioning accuracy independent actuators in a generic camshaft with which in particular practically arbitrarily large adjustment angle are easily possible. This problem is solved by the application of a for adjusting the camshaft itself already DE 102 22 475 A1 known swash plate drive in a special embodiment according to the characterizing features of patent claim 1.

Vorteilhafte und zweckmäßige Ausgestaltungen sind Gegenstand der Unteransprüche.Advantageous and expedient refinements are the subject of the dependent claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, einen an sich zur Drehwinkelverstellung einer einteiligen Nockenwelle bekannten Taumelscheiben-Stellantrieb in konstruktiv einfachen Weise in einen Zweifach-Stellantrieb umzuwandeln, mit dem auf konstruktiv einfache und sichere Weise beliebige Drehwinkelverstellungen zweier koaxial ineinander gelagerter Wellen erreichbar sind, die gemeinsamen eine Nockenwelle bilden, bei der jeweils mit der einen und der anderen der beiden Wellen verbundene Nocken einerseits gegeneinander drehwinkelverstellt werden können, wobei ferner andererseits gleichzeitig auch noch eine gemeinsame Drehwinkelverstellung beider Wellen möglich ist.The invention is based on the general idea to convert a known in itself for the rotational angle adjustment of a one-piece camshaft swashplate actuator in a simple manner in a double actuator, with the constructively simple and safe way arbitrary rotational angle adjustments of two coaxial nested waves can be achieved, the form a common camshaft, in each case connected to the one and the other of the two shafts cam on the one hand against each other drehwinkelverstellt, further on the other hand at the same time also a common rotational angle adjustment of both shafts is possible.

Bei einer vorteilhaften Ausbildung der Erfindung greifen die Mitnehmer beider Taumelscheiben in einen gemeinsamen, an einem der beiden Wellenenden ausgebildeten Ring ein. Die Mitnehmer sind in Richtung der gemeinsamen Achse der beiden Wellen innerhalb des Ringes verlagerbar.In an advantageous embodiment of the invention, the drivers of both swashplates engage in a common ring formed on one of the two shaft ends. The drivers are displaceable in the direction of the common axis of the two shafts within the ring.

Zweckmäßigerweise rotieren beide Taumelscheiben-Lager um eine gemeinsame Achse beider Wellen.Conveniently, both swash plate bearings rotate about a common axis of both shafts.

Für eine kompakte Bauweise der Stellantriebe in einer gemeinsamen Stelleinrichtung umfassen beide Stellantriebe koaxial zueinander ausgebildete, auf die Taumelscheiben-Lager einwirkende Antriebswellen.For a compact construction of the actuators in a common actuating device, both actuators comprise coaxial with one another, acting on the swash plate bearing drive shafts.

Die erfindungsgemäße Einrichtung mit zwei Taumelscheiben umfassenden Stellantrieben ermöglicht mit einer entsprechenden elektronischen Steuereinrichtung beliebige Verstellungen der beiden Wellen gegeneinander und/oder gemeinsam gegenüber dem Hauptantrieb.The inventive device with two swashplates comprehensive actuators allows any appropriate adjustments of the two shafts against each other and / or together with respect to the main drive with a corresponding electronic control device.

Ein besonderer Vorteil eines Stellantriebes mit einer Taumelscheibe besteht darin, auf einfache Weise sehr hohe Übersetzungsverhältnisse erreichen zu können. Das Grundprinzip eines Taumelscheiben-Antriebes in der Form eines Zahnradgetriebes besteht darin, dass sich die 2ähnezahlen zwischen dem Zahnkranz der Taumelscheibe und dem Zahnkranz, in dem die Taumelscheibe kämmt, lediglich durch lediglich eine geringe Zähnezahl, die im Extremfall eins sein kann, unterscheiden. Solche Taumelscheiben-Getriebe sind im Stand der Technik an sich bekannt, weshalb deren Wirkprinzip und konstruktiver Aufbau hier nicht näher erläutert werden muss. Nähere Informationen bezüglich eines Nockenwellen-Taumelscheibenverstellantriebes können beispielsweise der bereits eingangs erwähnten DE 102 22 475 A1 entnommen werden.A particular advantage of an actuator with a swash plate is to be able to achieve very high gear ratios in a simple manner. The basic principle of a swash plate drive in the form of a gear transmission is that the 2ähnezahlen between the sprocket of the swash plate and the ring gear in which the swash plate meshes, only by a small number of teeth, which may be one in the extreme case, different. Such swash plate gears are known per se in the prior art, which is why their operating principle and structural design need not be explained in detail here. Further information regarding a camshaft swash plate adjustment drive may, for example, already mentioned above DE 102 22 475 A1 be removed.

Ein vorteilhaftes, nachstehend näher beschriebenes Ausführungsbeispiel ist in der Zeichnung dargestellt.An advantageous, described in more detail below embodiment is shown in the drawing.

In dieser zeigen

Fig. 1
eine Taumelscheiben-Stelleinrichtung einer Nockenwelle in einem Längsschnitt,
Fig. 2
die gleiche Verstelleinrichtung in einer perspektivischen Darstellung bei einem dem Längsschnitt nach Fig. 1 aufgebrochen dargestellten Gehäuse der Stelleinrichtung.
In this show
Fig. 1
a swash plate adjusting device of a camshaft in a longitudinal section,
Fig. 2
the same adjusting device in a perspective view in a longitudinal section of FIG. 1 broken housing shown the adjusting device.

Eine Nockenwelle besteht aus koaxial ineinander gelagerten Wellen, nämlich einer ersten Welle 1 als Innenwelle und einer zweiten Welle 2 als Außenwelle. Von diesen beiden Wellen 1, 2 sind lediglich die Abschnitte an einem Ende dargestellt. Die aus den beiden Wellen 1 und 2 bestehende Nockenwelle besitzt erste Nocken, die fest mit der ersten Welle verbunden und zweite Nocken die mit der zweiten Welle verbunden sind, so dass diese Nocken durch eine Drehwinkelverstellung der beiden Wellen 1, 2 gegeneinander verdreht werden können. Die Nocken und deren Befestigung an den beiden Wellen 1, 2 sind in der Zeichnung nicht dargestellt.A camshaft consists of coaxially superimposed shafts, namely a first shaft 1 as an inner shaft and a second shaft 2 as an outer shaft. Of these two shafts 1, 2, only the sections are shown at one end. The consisting of the two shafts 1 and 2 camshaft has first cam, which are fixedly connected to the first shaft and second cam which are connected to the second shaft, so that these cams can be rotated by a rotation angle adjustment of the two shafts 1, 2 against each other. The cams and their attachment to the two shafts 1, 2 are not shown in the drawing.

Die beiden Wellen 1, 2 sind jeweils mit einem getrennt betätigbaren Stellantrieb verbunden und zwar die erste Welle 1 mit einem ersten Stellantrieb 3 und die zweite Welle 2 mit einem zweiten Stellantrieb 4. Beide Stellantriebe 3, 4 sind als Taumelscheibenantriebe ausgebildet.The two shafts 1, 2 are each connected to a separately operable actuator namely the first shaft 1 with a first actuator 3 and the second shaft 2 with a second actuator 4. Both actuators 3, 4 are designed as swash plate drives.

Mit der zweiten Welle 2 ist ein durchmessermäßig gestufter Ring 5 fest verbunden und dabei ist die feste Verbindung in dem Ringabschnitt mit dem geringen Durchmesser gegeben, während der Bereich mit dem größeren Durchmesser die beiden Stellantriebe 3, 4 umschließt, von denen dieser Bereich ein nachfolgend noch näher beschriebener Bestandteil ist.With the second shaft 2, a diameter-moderately stepped ring 5 is fixedly connected, while the fixed connection is made in the small-diameter ring section, while the larger-diameter section encloses the two actuators 3, 4, of which this section is one below is more detailed component.

Jeder der beiden Stellantriebe 3, 4 besteht aus folgenden Bestandteilen.Each of the two actuators 3, 4 consists of the following components.

Eine Taumelscheibe 3', 4' lagert drehbar auf einem Taumelscheibenlager 3''; 4''. Die Taumelscheibenlager 3''; 4" werden jeweils über eine Stell-Antriebswelle, nämlich eine erste und zweite Stell-Antriebswelle 3'''; 4''' angetrieben. Die erste Antriebswelle 3''' lagert koaxial innerhalb der als Hohlwelle ausgebildeten zweiten Antriebswelle 4'''. Das erste Taumelscheiben-Lager 3" lagert drehbar auf einer fest mit der ersten Welle 1 verbundenen ersten Achse 6. Fest verbunden mit der ersten Welle 1 ist eine Ringscheibe 7.A swash plate 3 ', 4' rotatably supports on a swash plate bearing 3 ''; 4 ''. The swash plate bearings 3 ''; 4 "are each driven via an actuating drive shaft, namely a first and second actuating drive shaft 3 '' ', 4' ''. The first drive shaft 3 '' 'coaxially supports within the second drive shaft 4' '' designed as a hollow shaft. The first swash plate bearing 3 "rotatably supports on a fixedly connected to the first shaft 1 first axis 6. Fixedly connected to the first shaft 1 is an annular disc. 7

Bei den Taumelscheiben 3'; 4' sind an deren jeweiligem Außenumfang Mitnehmern 3IV; 4IV vorgesehen, die nach radial außen abstehen. Diese Mitnehmer 3IV; 4IV greifen in eine Längsnut 8 in dem Innenumfang des Ringes 5 in dessen durchmessergroßen Abschnitt ein, wobei diese Längsnut parallel zu der gemeinsamen Achse der ersten und zweiten Welle 1, 2 verläuft. Bei Vorhandensein von mehreren auf dem Umfang der Taumelscheiben 3', 4' verteilten Mitnehmern 3IV; 4IV ist eine entsprechende Anzahl von Längsnuten 8 vorgesehen. In ihrem radial äußeren Seitenbereich sind die beiden Taumelscheiben 3', 4' jeweils mit einem Zahnkranz nämlich einem ersten und zweiten Zahnkranz 3V; 4V versehen. Diese Zahnkränze 3V; 4V greifen in jeweils zugeordnete Zahnkränze ein. Bei dem ersten Stellantrieb 3 befindet sich ein solcher zugeordneter Zahnkranz 7' an der Ringscheibe 7.In the swash plates 3 '; 4 'are at their respective outer periphery drivers 3 IV ; 4 IV provided, which protrude radially outward. These drivers 3 IV ; 4 IV engage in a longitudinal groove 8 in the inner periphery of the ring 5 in its large diameter portion, said longitudinal groove parallel to the common axis of the first and second shaft 1, 2 extends. In the presence of several on the circumference of the swash plates 3 ', 4' distributed drivers 3 IV ; 4 IV a corresponding number of longitudinal grooves 8 is provided. In your radially outer side region, the two swash plates 3 ', 4' each with a ring gear namely a first and second ring gear 3 V ; 4 V provided. These sprockets 3 V ; 4 V engage in each assigned sprockets. In the first actuator 3, such an associated sprocket 7 'is located on the annular disk 7.

Der zweite Zahnkranz 4V der zweiten Taumelscheibe 4' kämmt in einem Zahnkranz 9' einer Ringhülse 9. Die Ringhülse 9 ist fest verbunden mit einem Zahnrad 10 eines Nockenwellen-Hauptantriebes. Dieser Hauptantrieb besitzt als Antriebsquelle eine Kurbelwelle eines Verbrennungsmotors, von der das Zahnrad 10 über eine nicht dargestellte Antriebskette angetrieben wird. Auf einer fest mit der Ringhülse 9 verbundenen zweiten Achse 11 des zweiten Stellantriebes 4 ist das zweite Taumelscheibenlager 4'' drehbar gelagert.The second ring gear 4 V of the second swash plate 4 'meshes in a ring gear 9' of an annular sleeve 9. The annular sleeve 9 is fixedly connected to a gear 10 of a camshaft main drive. This main drive has as a drive source, a crankshaft of an internal combustion engine, of which the gear 10 is driven by a drive chain, not shown. On a fixedly connected to the annular sleeve 9 second axis 11 of the second actuator 4, the second swash plate bearing 4 '' is rotatably mounted.

Die beiden Stell-Antriebswellen 3''' und 4''' sind Bestandteil zweier elektrischer Stellmotoren, die in der Zeichnung nicht dargestellt sind.The two adjusting drive shafts 3 '' 'and 4' '' are part of two electric servomotors, which are not shown in the drawing.

Bei den beiden Stellantrieben 3, 4 wirken die Taumelscheiben 3'; 4' zusammen mit den Zahnkränzen 7' und 9', mit denen sie zusammenwirken, als Reduziergetriebe.In the two actuators 3, 4, the swash plates 3 'act; 4 'together with the sprockets 7' and 9 ', with which they interact as a reduction.

Der verstellbare Nockenwellenantrieb funktioniert wie folgt.The adjustable camshaft drive works as follows.

Für den Fall inaktiv geschalteter Stellantriebe 3, 4 erfolgt über das Zahnrad 10 ein Antrieb beider Wellen 1, 2 mit gleicher Drehzahl.In the case of inactive switched actuators 3, 4 takes place via the gear 10, a drive of both shafts 1, 2 at the same speed.

Erfolgt bei einem inaktiven ersten Stellantrieb 3 eine Verstellung durch den zweiten Stellantrieb 4, so werden beide Wellen 1, 2 mit einem gleichen Drehwinkel gegenüber dem Zahnrad 10 drehwinkelverstellt.If an adjustment is made by the second actuator 4 in the case of an inactive first actuator 3, then both shafts 1, 2 are rotationally adjusted with respect to the gearwheel 10 at the same rotational angle.

Für eine gegenseitige Verstellung der Wellen 1, 2 sorgt der erste Stellantrieb 3.For a mutual adjustment of the shafts 1, 2, the first actuator 3 provides.

Auf diese Weise können auf einfache Weise durch eine entsprechende Steuerung der Stellantriebe 3, 4 die Wellen 1 und 2 gegeneinander und gemeinsam gegenüber dem über das Zahnrad 10 angreifenden Hauptantrieb drehwinkelverstellt werden.In this way, the shafts 1 and 2 can be rotational angle adjusted in a simple manner by a corresponding control of the actuators 3, 4 against each other and together with respect to the engaging via the gear 10 main drive.

Alle in der Beschreibung und in den nachfolgenden Ansprüchen dargestellten Merkmale können sowohl einzeln als auch in beliebiger Form miteinander kombiniert erfindungswesentlich sein.All features described in the description and in the following claims can be essential to the invention, both individually and in any desired form.

Claims (5)

Nockenwelle für insbesondere eine Betätigung der Gaswechelsventile eines Verbrennungsmotors mit - zwei koaxial ineinander und gegeneinander verdrehbar gelagerten Wellen, nämlich einer ersten und einer zweiten Welle (1; 2), - ersten mit der ersten Welle (1) und zweiten mit der zweiten Welle (2) jeweils fest verbundenen Nocken, - einem auf beide Wellen (1, 2) einwirkenden Haupt-Nockenwellenantrieb, - und einer Einrichtung zur Verstellung einerseits der Drehwinkellage der ersten und zweiten Welle gegeneinander durch einen ersten Stellantrieb und andererseits beider Wellen (1, 2) der Nockenwelle gemeinsam durch einen zweiten Stellantrieb (4), gekennzeichnet durch die Merkmale, - die beiden Stellantriebe (3, 4) weisen jeweils ein Taumelscheiben-Getriebe mit Taumelscheiben 3'; 4' auf, die jeweils um die gemeinsame Nockenwellenachse auf einem Taumelscheibenlager (3''; 4'') gelagert sind und mit jeweils einem Zahnkranz (3V; 4V) sowie jeweils mit mindestens einem Mitnehmer (3IV; 4IV) versehen sind, - die Mitnehmer (3IV; 4IV) beider Taumelscheiben (3IV; 4IV) wirken mit einer der beiden Wellen (1, 2) unmittelbar zusammen, - von den Taumelscheiben (3'; 4') wirkt eine über ihren zugehörigen ersten Zahnkranz (3V) mit einer der beiden Wellen (1; 2) zusammen und die andere über ihren zugehörigen zweiten Zahnkranz (4V) mit einem Zahnkranz (9') eines Abtriebselementes des Hauptantriebes zusammen. Camshaft for in particular an actuation of the gas exchange valves of an internal combustion engine with two shafts coaxial with each other and rotatable relative to one another, namely a first and a second shaft (1, 2), - First with the first shaft (1) and second with the second shaft (2) each firmly connected cam, a main camshaft drive acting on both shafts (1, 2), - And a device for adjusting the one hand, the rotational angular position of the first and second shaft against each other by a first actuator and on the other hand both shafts (1, 2) of the camshaft together by a second actuator (4), characterized by the features - The two actuators (3, 4) each have a swash plate transmission with swash plates 3 '; 4 ', which are mounted in each case about the common camshaft axis on a swash plate bearing (3'',4'') and each provided with a sprocket (3 V , 4 V ) and each with at least one driver (3 IV , 4 IV ) are, - The driver (3 IV , 4 IV ) of both swash plates (3 IV , 4 IV ) with one of the two shafts (1, 2) directly together, of the swash plates (3 ', 4'), one acts on its associated first sprocket (3 V ) with one of the two shafts (1, 2) and the other on its associated second sprocket (4 V ) with a sprocket (9 ') of an output element of the main drive together. Nockenwelle nach Anspruch 1,
dadurch gekennzeichnet,
dass die Mitnehmer (3IV; 4IV) in Längsnuten (8) eines mit einer der beiden Wellen (1, 2) verbundenen Ringes (5) eingreifen.Camshaft according to claim 1,
characterized,
in that the drivers (3 IV , 4 IV ) engage in longitudinal grooves (8) of a ring (5) connected to one of the two shafts (1, 2). Nockenwelle nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass beide Taumelscheiben-Lager (3''; 4'') um die gemeinsame Achse beider Wellen (1, 2) rotieren.Camshaft according to claim 1 or 2,
characterized,
that both swash plate bearings (3 ", 4") rotate about the common axis of both shafts (1, 2). Nockenwelle nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die beiden Stellantriebe (3, 4) koaxial zueinander ausgebildete, auf die Taumelscheiben-Lager (3''; 4'') einwirkende Antriebswellen (3'''; 4''') umfassen.Camshaft according to one of the preceding claims,
characterized,
in that the two actuators (3, 4) comprise drive shafts (3 ''',4''') formed coaxially with one another and acting on the swashplate bearings (3 '', 4 ''). Nockenwelle nach einem der vorhergehenden Ansprüche mit einer Steuereinrichtung zum beliebigen Verstellen der Drehwinkel der beiden Wellen (1, 2) untereinander und/oder gemeinsam gegenüber dem Nockenwellen-Hauptantrieb.Camshaft according to one of the preceding claims with a control device for arbitrarily adjusting the rotational angle of the two shafts (1, 2) with each other and / or together with respect to the main camshaft drive.
EP06125818A 2005-12-21 2006-12-11 Camshaft Expired - Fee Related EP1803904B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005061187A DE102005061187A1 (en) 2005-12-21 2005-12-21 camshaft

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EP1803904A2 true EP1803904A2 (en) 2007-07-04
EP1803904A3 EP1803904A3 (en) 2009-04-08
EP1803904B1 EP1803904B1 (en) 2010-04-07

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ID=38033326

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US (1) US7421992B2 (en)
EP (1) EP1803904B1 (en)
DE (2) DE102005061187A1 (en)

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WO2011010241A1 (en) * 2009-07-23 2011-01-27 Mechadyne Plc Phaser assembly for an internal combustion engine
WO2011042391A1 (en) * 2009-10-05 2011-04-14 Schaeffler Technologies Gmbh & Co. Kg Camshaft arrangement
KR20120089281A (en) * 2009-10-05 2012-08-09 섀플러 테크놀로지스 아게 운트 코. 카게 Camshaft arrangement
WO2013053421A1 (en) * 2011-10-15 2013-04-18 Volkswagen Aktiengesellschaft Valve train for an internal combustion engine
WO2013171321A1 (en) 2012-05-18 2013-11-21 Schaeffler Technologies AG & Co. KG Camshaft unit
WO2013171322A1 (en) 2012-05-18 2013-11-21 Schaeffler Technologies AG & Co. KG Camshaft unit

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DE102021114162B4 (en) 2021-06-01 2022-12-08 Schaeffler Technologies AG & Co. KG Electromechanical camshaft adjuster

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DE19526888A1 (en) * 1995-04-21 1997-01-23 Audi Ag Mechanism for discrete adjustment of phase position of two camshafts
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011010241A1 (en) * 2009-07-23 2011-01-27 Mechadyne Plc Phaser assembly for an internal combustion engine
CN102439265A (en) * 2009-07-23 2012-05-02 米查戴尼股份有限公司 Phaser assembly for an internal combustion engine
CN102439265B (en) * 2009-07-23 2015-02-11 麦加戴恩国际有限公司 Phaser assembly for an internal combustion engine
WO2011042391A1 (en) * 2009-10-05 2011-04-14 Schaeffler Technologies Gmbh & Co. Kg Camshaft arrangement
KR20120089281A (en) * 2009-10-05 2012-08-09 섀플러 테크놀로지스 아게 운트 코. 카게 Camshaft arrangement
KR20120089280A (en) * 2009-10-05 2012-08-09 섀플러 테크놀로지스 아게 운트 코. 카게 Camshaft arrangement
US8627795B2 (en) 2009-10-05 2014-01-14 Schaeffler Technologies AG & Co. KG Camshaft arrangement
WO2013053421A1 (en) * 2011-10-15 2013-04-18 Volkswagen Aktiengesellschaft Valve train for an internal combustion engine
WO2013171321A1 (en) 2012-05-18 2013-11-21 Schaeffler Technologies AG & Co. KG Camshaft unit
WO2013171322A1 (en) 2012-05-18 2013-11-21 Schaeffler Technologies AG & Co. KG Camshaft unit
US9638306B2 (en) 2012-05-18 2017-05-02 Schaeffler Technologies AG & Co. KG Camshaft unit

Also Published As

Publication number Publication date
DE502006006633D1 (en) 2010-05-20
US7421992B2 (en) 2008-09-09
DE102005061187A1 (en) 2007-06-28
US20070137598A1 (en) 2007-06-21
EP1803904A3 (en) 2009-04-08
EP1803904B1 (en) 2010-04-07

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