EP3334910B1 - Adjustable camshaft with camshaft phaser - Google Patents
Adjustable camshaft with camshaft phaser Download PDFInfo
- Publication number
- EP3334910B1 EP3334910B1 EP16753846.1A EP16753846A EP3334910B1 EP 3334910 B1 EP3334910 B1 EP 3334910B1 EP 16753846 A EP16753846 A EP 16753846A EP 3334910 B1 EP3334910 B1 EP 3334910B1
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- EP
- European Patent Office
- Prior art keywords
- oil
- camshaft
- inner shaft
- duct
- phase shifter
- 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.)
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- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- 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
-
- 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
- F01L1/02—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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L2001/34423—Details relating to the hydraulic feeding circuit
Definitions
- the present invention relates to an adjustable camshaft for the valve train of an internal combustion engine, comprising an outer shaft and an inner shaft rotatable in the outer shaft, and with a phase adjuster with which the outer shaft and / or the inner shaft can be adjusted in a phase position formed about an axis of rotation, and wherein the Camshaft has a bearing section for mounting the camshaft, via which the phase adjuster can be fed with a pressure medium.
- the rotor is usually attached to the end of the inner shaft and the stator of the phase adjuster is usually attached to the end of the outer shaft.
- the problem arises that, for example, four or more channels are necessary in order to pressurize the individual chambers between the rotor and stator of the phase adjuster. If the phase adjuster, in particular the rotor, is fastened to the inner shaft with a central screw, there are particular difficulties in accommodating the channels in the inner shaft and / or the outer shaft due to the reduced installation space.
- the DE 10 2006 028 611 A1 an adjustable camshaft with a phase adjuster, which is screwed at the end to the inner shaft with a central screw.
- the outer shaft is rotatably received in a bearing ring, the bearing ring being designed to rotate with the outer shaft.
- the bearing ring is received in a re-bearing, which is formed by the bearing bridge, for example of the camshaft module or the like, and does not rotate with it.
- Only two oil channels are shown which are guided to the adjusting elements of the phase adjuster and which must run over the end bearing section of the camshaft. Further oil channels are guided over a bearing section and run centrally through the inner shaft and through a gap between the inner shaft and the outer shaft.
- the object of the invention is the development of an adjustable camshaft with an improved arrangement of a phase adjuster at the end of the camshaft.
- FIG 4 An embodiment of an adjustable camshaft 10 with a phase adjuster 1, wherein the phase adjuster 1 is designed, for example, as a dual phase adjuster, as shown schematically by a two-part rotor 17, for example.
- the exemplary embodiment has two oil guide sleeves 25 and 26 arranged concentrically with respect to one another, and the oil guide sleeve 25 is inserted inside the oil guide sleeve 26 to form an annular gap.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Description
Die vorliegende Erfindung betrifft eine verstellbare Nockenwelle zum Ventiltrieb einer Brennkraftmaschine, aufweisend eine Außenwelle und eine in der Außenwelle verdrehbare Innenwelle, und mit einem Phasensteller, mit dem die Außenwelle und/oder die Innenwelle in einer um eine Rotationsachse gebildete Phasenlage verstellbar ist, und wobei die Nockenwelle einen Lagerabschnitt zur Lagerung der Nockenwelle aufweist, über den der Phasensteller mit einem Druckmittel speisbar ist.The present invention relates to an adjustable camshaft for the valve train of an internal combustion engine, comprising an outer shaft and an inner shaft rotatable in the outer shaft, and with a phase adjuster with which the outer shaft and / or the inner shaft can be adjusted in a phase position formed about an axis of rotation, and wherein the Camshaft has a bearing section for mounting the camshaft, via which the phase adjuster can be fed with a pressure medium.
Verstellbare Nockenwellen dienen zum variablen Ventiltrieb einer Brennkraftmaschine, und durch den Phasensteller kann während der Rotation der verstellbaren Nockenwelle die Phasenlage der Innenwelle relativ zur Phasenlage der Außenwelle verstellt werden. Auch besteht die Möglichkeit, die Phasenlage der Innenwelle und der Außenwelle gemeinsam relativ zur Phasenlage eines Antriebsrades zu verstellen, über das die Nockenwelle um die Rotationsachse rotierend angetrieben wird. Sogenannte Dual-Phasensteller ermöglichen beispielsweise die Änderung der Phasenlage der Außenwelle und der Innenwelle gemeinsam und zugleich ist die Verstellung der Phasenlage der Innenwelle relativ zur Außenwelle möglich.Adjustable camshafts are used for the variable valve train of an internal combustion engine, and the phase adjuster can be used to adjust the phase position of the inner shaft relative to the phase position of the outer shaft during the rotation of the adjustable camshaft. There is also the possibility of jointly adjusting the phase position of the inner shaft and the outer shaft relative to the phase position of a drive wheel, by means of which the camshaft is driven to rotate about the axis of rotation. So-called dual phase adjusters enable, for example, the phase position of the outer shaft and the inner shaft to be changed together, and at the same time the phase position of the inner shaft can be adjusted relative to the outer shaft.
Phasensteller werden in der Regel durch ein Druckmittel, insbesondere ein Öl, betrieben, indem zwischen einem Rotor und einem Stator des Phasenstellers gebildete Druckkammern wechselweise fluidisch beaufschlagt werden. Um die Druckmittelzufuhr an den mit der Nockenwelle rotierenden Phasensteller zu ermöglichen, erfolgt die Speisung mit dem Druckmittel in der Regel über einen Lagerabschnitt auf der Außenwelle der Nockenwelle, über den die Nockenwelle in einer Lagerbrücke gelagert ist. Der Lagerabschnitt bildet dabei in der Regel den äußersten Lagerabschnitt am Ende der Nockenwelle, sodass die Außenwelle und insbesondere die Innenwelle mit dem Lagerabschnitt in ihrer Längsrichtung entlang der Rotationsachse abschließen und wobei sich an das Ende in Rotationsachsenrichtung der Phasensteller anschließt. Am Ende der Innenwelle wird in der Regel der Rotor und am Ende der Außenwelle wird in der Regel der Stator des Phasenstellers befestigt. Insbesondere bei Dual-Phasenstellern ergibt sich dabei das Problem, dass beispielsweise vier oder mehr Kanäle notwendig sind, um die einzelnen Kammern zwischen Rotor und Stator des Phasenstellers mit Druckmittel zu beaufschlagen. Wenn der Phasensteller, insbesondere der Rotor, mit einer Zentralschraube an der Innenwelle befestigt ist, ergeben sich aufgrund des reduzierten Bauraumes besondere Schwierigkeiten bei der Unterbringung der Kanäle in der Innenwelle und/oder der Außenwelle.Phase adjusters are generally operated by a pressure medium, in particular an oil, in that pressure chambers formed between a rotor and a stator of the phase adjuster are acted upon alternately by fluid. In order to enable the pressure medium to be fed to the phase adjuster rotating with the camshaft, the pressure medium is usually supplied via a bearing section on the outer shaft of the camshaft, via which the camshaft is mounted in a bearing bridge. The bearing section generally forms the outermost bearing section at the end of the camshaft, so that the outer shaft and in particular the inner shaft along with the bearing section in its longitudinal direction complete the axis of rotation and the phase adjuster adjoins the end in the direction of the axis of rotation. The rotor is usually attached to the end of the inner shaft and the stator of the phase adjuster is usually attached to the end of the outer shaft. In particular in the case of dual phase adjusters, the problem arises that, for example, four or more channels are necessary in order to pressurize the individual chambers between the rotor and stator of the phase adjuster. If the phase adjuster, in particular the rotor, is fastened to the inner shaft with a central screw, there are particular difficulties in accommodating the channels in the inner shaft and / or the outer shaft due to the reduced installation space.
Beispielsweise zeigt die
Eine weitere verstellbare Nockenwelle ist aus der
Eine gattungsgemäße Nockenwelle ist ferner aus der
Aufgabe der Erfindung ist die Weiterbildung einer verstellbaren Nockenwelle mit einer verbesserten Anordnung eines Phasenstellers am Ende der Nockenwelle. Insbesondere ist es die Aufgabe der Erfindung, den Montageaufwand der Nockenwelle zu reduzieren.The object of the invention is the development of an adjustable camshaft with an improved arrangement of a phase adjuster at the end of the camshaft. In particular, it is the object of the invention to reduce the assembly effort of the camshaft.
Diese Aufgabe wird ausgehend von einer verstellbaren Nockenwelle gemäß dem Oberbegriff des Anspruches 1 in Verbindung mit den kennzeichnenden Merkmalen gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved on the basis of an adjustable camshaft according to the preamble of
Erfindungsgemäß weist die Anbindung des Rotors an den Verschraubungsflansch Schraubelemente auf, wobei die Schraubelemente beabstandet zur Rotationsachse angeordnet sind. Grundsätzlich kann ein einziges Schraubelement ausreichend sein, um den Rotor des Phasenstellers mit dem Verschraubungsflansch zu verbinden, vorteilhafterweise sind jedoch mehrere auf dem Umfang beispielsweise gleich verteilte Schraubelemente vorgesehen, die auf einem um die Rotationsachse ausgebildeten Teilkreis herum angeordnet sind. Die Schraubelemente erstrecken sich mit ihrer Längsachse beispielsweise parallel beabstandet zur Rotationsachse und können von der Außenseite des Phasenstellers, insbesondere des Rotors, eingeschraubt sein, wofür der Verschraubungsflansch beispielsweise Gewindebohrungen aufweist.According to the invention, the connection of the rotor to the screw flange has screw elements, the screw elements being arranged at a distance from the axis of rotation. In principle, a single screwing element can be sufficient to connect the rotor of the phase adjuster to the screwing flange, but advantageously several screwing elements, for example equally distributed on the circumference, are provided, which are arranged on a pitch circle formed around the axis of rotation. The screw elements extend with their longitudinal axis, for example parallel, at a distance from the axis of rotation and can be screwed in from the outside of the phase adjuster, in particular the rotor, for which purpose the screw flange has, for example, threaded bores.
Die Zentralschraube im vorliegenden Sinne ist eine Schraube, die in das Ende der Innenwelle eingeschraubt ist, und die Schraube befindet sich konzentrisch zur Rotationsachse. Entfällt diese Schraube durch eine erfindungsgemäße Weiterbildung der verstellbaren Nockenwelle mit den Merkmalen der vorliegenden Erfindung, so ergibt sich ein deutlich vergrößerter Bauraum zur Ausgestaltung der Kanäle, um eine Druckmittelverbindung zwischen dem Lagerabschnitt und dem Phasensteller herzustellen. Dabei sieht die Erfindung einen zentralen Kanal vor, der mit der Rotationsachse zusammenfällt und der am Ende der Innenwelle nach außen bzw. in den Phasensteller mündet, sodass ein Phasensteller, der am Ende der Nockenwelle angeordnet ist, wenigstens auch über den zentralen Kanal mit einem Druckmittel gespeist werden kann.The central screw in the present sense is a screw that is screwed into the end of the inner shaft, and the screw is concentric with the axis of rotation. This screw is omitted due to an inventive development of the adjustable camshaft with the features of the present Invention, there is a significantly increased space for designing the channels to establish a pressure medium connection between the bearing section and the phase adjuster. The invention provides a central channel that coincides with the axis of rotation and that opens outward or into the phase adjuster at the end of the inner shaft, so that a phase adjuster that is arranged at the end of the camshaft also has a pressure medium at least via the central channel can be fed.
Die erfindungsgemäße Anordnung des Verschraubungsflansches am Ende der Innenwelle kann auf verschiedene Weise ausgeführt sein, wobei das Ende der Innenwelle nicht zwingend geometrisch mit dem Verschraubungsflansch abschließen muss, und im Sinne der Erfindung betrifft das Ende der Innenwelle lediglich allgemein den Bereich der Innenwelle, der sich in Rotationsachsenrichtung an den Lagerabschnitt anschließt.The arrangement of the screw flange at the end of the inner shaft according to the invention can be carried out in different ways, the end of the inner shaft not necessarily having to terminate geometrically with the screw flange, and in the sense of the invention the end of the inner shaft only relates generally to the area of the inner shaft that is in Axis of rotation connects to the bearing section.
Im Sinne eines vorteilhaften Ausführungsbeispiels sitzt der Verschraubungsflansch auf dem Ende der Innenwelle auf, sodass sich das Ende zentrisch in den Verschraubungsflansch hinein erstreckt. Beispielsweise ist der Verschraubungsflansch auf dem Ende der Innenwelle durch einen Querpressverband oder durch einen Längspressverband aufgebracht, auch ist es denkbar, dass der Verschraubungsflansch stoffschlüssig, beispielsweise durch ein Schweißverfahren, ein Lötverfahren oder ein Klebeverfahren, mit dem Ende der Innenwelle verbunden ist. Besonders vorteilhaft ist es, wenn der Verschraubungsflansch mit einer erforderlichen Genauigkeit zentriert auf dem Ende der Innenwelle aufsitzt, sodass der Rotor des Phasenstellers wiederum über den Verschraubungsflansch zentrierbar ist. Ferner besteht die Möglichkeit, dass der Verschraubungsflansch einteilig mit der Innenwelle ausgebildet ist, sodass eine Verbindungsanordnung zwischen dem Verschraubungsflansch und der Innenwelle vorteilhafterweise entfällt.In the sense of an advantageous embodiment, the screw flange sits on the end of the inner shaft, so that the end extends centrally into the screw flange. For example, the screw flange is applied to the end of the inner shaft by means of a transverse compression bandage or a longitudinal press bandage, it is also conceivable that the screw flange is integrally connected to the end of the inner shaft, for example by a welding process, a soldering process or an adhesive process. It is particularly advantageous if the screw flange is centered on the end of the inner shaft with a required accuracy, so that the rotor of the phase adjuster can in turn be centered over the screw flange. There is also the possibility that the screw flange is formed in one piece with the inner shaft, so that a connection arrangement between the screw flange and the inner shaft is advantageously omitted.
Ein besonderer Vorteil wird erreicht, wenn zwischen der Außenwelle und der Innenwelle wenigstens abschnittsweise ein Ringspalt ausgebildet ist. Dadurch wird erreicht, dass der zentrische Kanal einen ersten Ölkanal und der Ringspalt einen zweiten Ölkanal zur Speisung des Phasenstellers bildet. Der zentrische Kanal ist besonders einfach herstellbar und kann in gewisser Weise die Gewindebohrung ersetzen, in die in an sich bekannter Weise die Zentralschraube einschraubbar ist. Durch die erfindungsgemäße Möglichkeit, die Zentralschraube zu entfernen, kann der zentrische Kanal den ersten Ölkanal bilden, und der Ringspalt zwischen der Innenwelle und der Außenwelle bildet einen zweiten Ölkanal. Der Ringspalt und der zentrische Kanal können durch zugeordnete Radialkanäle in der Innenwelle und/oder der Außenwelle gespeist werden. Die Radialkanäle münden dabei in die Lauffläche des Lagerabschnittes zur Lagerung der Nockenwelle. Gemäß einer vorteilhaften Weiterbildung der erfindungsgemäßen Nockenwelle ist im Kanal wenigstens eine Ölführungshülse unter Bildung eines Ringspaltes zwischen der Außenfläche der Ölführungshülse und der Innenfläche des Kanals eingebracht, wobei die Ölführungshülse innenseitig einen ersten Ölkanal und mit dem Ringspalt einen zweiten Ölkanal bildet. Dadurch wird der Vorteil erreicht, dass bereits mit einem einzigen zentrischen Kanal in der Innenwelle zwei voneinander getrennte Ölführungen zwischen dem Lagerabschnitt und dem Phasensteller gebildet werden, und es muss lediglich auf einfache Weise die Ölführungshülse in den Kanal eingebracht werden, beispielsweise durch ein Einpressen, ein Einkleben oder dergleichen. Die Ölführungshülse ist beispielsweise als dünnwandiges Blechbauteil ausgebildet und kann unter Bildung entsprechender Toleranzen im Kanal selbsthaltend verspannt werden.A particular advantage is achieved if an annular gap is formed at least in sections between the outer shaft and the inner shaft. It is thereby achieved that the central channel forms a first oil channel and the annular gap forms a second oil channel for feeding the phase adjuster. The central channel is particularly easy to manufacture and can in a certain way be the threaded hole replace, in which the central screw can be screwed in a conventional manner. Due to the possibility according to the invention of removing the central screw, the central channel can form the first oil channel, and the annular gap between the inner shaft and the outer shaft forms a second oil channel. The annular gap and the central channel can be fed by assigned radial channels in the inner shaft and / or the outer shaft. The radial channels open into the tread of the bearing section for mounting the camshaft. According to an advantageous development of the camshaft according to the invention, at least one oil guide sleeve is introduced in the channel to form an annular gap between the outer surface of the oil guide sleeve and the inner surface of the channel, the oil guide sleeve forming a first oil channel on the inside and a second oil channel with the annular gap. This achieves the advantage that two separate oil guides are formed between the bearing section and the phase adjuster with a single central channel in the inner shaft, and the oil guide sleeve only has to be introduced into the channel in a simple manner, for example by pressing Glue or the like. The oil guide sleeve is designed, for example, as a thin-walled sheet metal component and can be clamped in the channel in a self-retaining manner, with the formation of corresponding tolerances.
Eine entsprechende Weiterbildung der Druckmittelversorgung des Phasenstellers sieht vor, dass im Kanal eine erste Ölführungshülse und wenigstens eine zweite Ölführungshülse eingebracht sind, wobei die Ölführungshülsen ineinander liegend und insbesondere konzentrisch zur Rotationsachse angeordnet sind. Im Rahmen der Erfindung besteht auch die Möglichkeit, mehr als zwei Ölführungshülsen in den Kanal einzubringen, um voneinander getrennte Druckmittelführungen zwischen dem Lagerabschnitt und dem Phasensteller zu erzeugen. Insbesondere besteht auch die Möglichkeit, zur Speisung des Phasenstellers mit Druckmittel einen weiteren Lagerabschnitt der Nockenwelle mit einzubeziehen, an den wenigstens ein, insbesondere zwei Ölkanäle herangeführt sind.A corresponding further development of the pressure medium supply to the phase adjuster provides that a first oil guide sleeve and at least one second oil guide sleeve are introduced in the channel, the oil guide sleeves lying one inside the other and in particular being arranged concentrically to the axis of rotation. Within the scope of the invention there is also the possibility of introducing more than two oil guide sleeves into the channel in order to generate separate pressure medium guides between the bearing section and the phase adjuster. In particular, there is also the possibility of including a further bearing section of the camshaft for supplying the phase adjuster with pressure medium, to which at least one, in particular two, oil channels are introduced.
Mit weiterem Vorteil weisen die Ölführungshülsen unterschiedliche Längen auf und erstrecken sich damit unterschiedlich tief in den Kanal hinein, sodass die innerhalb und/oder zwischen und/oder außenseitig der Ölführungshülsen gebildeten Ölkanäle mit voneinander getrennten Radialkanälen in der Außenwelle und/oder Innenwelle fluidisch verbunden sind. Durch entsprechende Abstufungen im Kanal, die beispielsweise aus Kanalabschnitten mit unterschiedlichen Durchmessern gebildet sind, sind die einzelnen Ölführungshülsen vorteilhafterweise so zu verbinden, dass voneinander getrennte Ölführungen zwischen den Hülsen erreicht werden.With further advantage, the oil guide sleeves have different lengths and thus extend into the channel at different depths, so that the oil channels formed inside and / or between and / or outside of the oil guide sleeves with separate radial channels in the outer shaft and / or Inner shaft are fluidly connected. By means of corresponding gradations in the channel, which are formed, for example, from channel sections with different diameters, the individual oil guide sleeves can advantageously be connected in such a way that separate oil guides are achieved between the sleeves.
Auch besteht die Möglichkeit, dass wenigstens einer der Ölkanäle abschnittsweise im Verschraubungsflansch ausgebildet ist, d.h. sich in diesen hinein fortsetzt. Beispielsweise besteht die Möglichkeit, dass ein Ölkanal, der durch einen Ringspalt zwischen der Außenseite der Innenwelle und der Innenseite der Außenwelle gebildet ist, mit einem Ölkanal fluidisch kommuniziert, sich in den Verschraubungsflansch fortsetzt. Selbstverständlich besteht auch die Möglichkeit, einen Radialkanal in dem Bereich auf dem Ende der Innenwelle auszubilden, in dem der Verschraubungsflansch aufsitzt. Dadurch kann der Verschraubungsflansch in die Druckmittelführung zwischen dem Lagerabschnitt und dem Phasensteller ebenfalls mit einbezogen werden.There is also the possibility that at least one of the oil channels is formed in sections in the screw flange, i.e. continues into this. For example, there is the possibility that an oil channel, which is formed by an annular gap between the outside of the inner shaft and the inside of the outer shaft, communicates fluidly with an oil channel and continues into the screw flange. Of course, there is also the possibility of forming a radial channel in the area on the end of the inner shaft in which the screw flange is seated. As a result, the screw flange can also be included in the pressure medium guide between the bearing section and the phase adjuster.
Zur Zentrierung des Rotors des Phasenstellers mit Bezug auf die Rotationsachse sind mehrere Möglichkeiten gegeben. Beispielsweise besteht die Möglichkeit, den Rotor mittels des Verschraubungsflansches um die Rotationsachse zu zentrieren oder es besteht die Möglichkeit, dass zwischen dem Rotor des Phasenstellers und dem Verschraubungsflansch ein Nachgiebigkeitselement angeordnet ist, über das ein Drehmoment unter Ausgleich von Lagefehlern übertragbar ist, wobei der Rotor selbst im Stator des Phasenstellers zentriert wird. Nachgiebigkeitselemente sind bekannt als Flexscheiben oder dergleichen, und es besteht auch die Möglichkeit, ein nachgiebiges Material vorzusehen, beispielsweise ein gummielastisches Material, das eine Verbindung bildet zwischen dem Rotor und dem Verschraubungsflansch. Die genaue Zentrierung des Rotors um die Rotationsachse erfolgt dadurch, dass dieser im Stator des Phasenstellers geführt ist. Durch die Anordnung eines Nachgiebigkeitselements ist damit der Rotor in seiner Führung nicht überbestimmt.There are several options for centering the rotor of the phase adjuster with respect to the axis of rotation. For example, there is the possibility of centering the rotor around the axis of rotation by means of the screw flange, or there is the possibility that a resilient element is arranged between the rotor of the phase adjuster and the screw flange, via which a torque can be transmitted while compensating for position errors, the rotor itself is centered in the stator of the phase adjuster. Resilience elements are known as flex disks or the like, and there is also the possibility of providing a resilient material, for example a rubber-elastic material that forms a connection between the rotor and the screw flange. The exact centering of the rotor around the axis of rotation takes place in that it is guided in the stator of the phase adjuster. The arrangement of a resilience element means that the rotor is not overdetermined in its guidance.
Gemäß einer weiteren Variante der verstellbaren Nockenwelle weist die Außenwelle ein Ende auf, an dem ein Antriebsrad angeordnet ist und wobei am Antriebsrad ein Stator des Phasenstellers wenigstens mittelbar angebunden ist.According to a further variant of the adjustable camshaft, the outer shaft has an end on which a drive wheel is arranged and a stator of the phase adjuster is at least indirectly connected to the drive wheel.
Insbesondere ist es von Vorteil, wenn die Anbindung des Stators am Antriebsrad ein Nachgiebigkeitselement, insbesondere eine Flexscheibe aufweist. Dabei sollte wenigstens ein Teil des Phasenstellers, also der Rotor oder der Stator, eine starre, zentrierte Anordnung auf der Innenwelle beziehungsweise auf der Außenwelle aufweisen, sodass der wenigstens eine andere Teil des Phasenstellers am zentrierten Teil geführt wird.It is particularly advantageous if the connection of the stator to the drive wheel has a resilience element, in particular a flexible disk. At least part of the phase adjuster, that is to say the rotor or the stator, should have a rigid, centered arrangement on the inner shaft or on the outer shaft, so that the at least one other part of the phase adjuster is guided on the centered part.
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit einem vorteilhaften Ausführungsbeispiel der Erfindung anhand der Figuren näher dargestellt. Es zeigt:
- Fig. 1
- Ein erstes Ausführungsbeispiel einer verstellbaren Nockenwelle mit einem Phasensteller, wobei ein Ölkanal durch einen zentralen Kanal in der Innenwelle gebildet ist und wobei ein weiterer Ölkanal durch einen radialen Spalt zwischen der Innenwelle und der Außenwelle gebildet ist,
- Fig. 2
- ein zweites Ausführungsbeispiel einer verstellbaren Nockenwelle mit einem Phasensteller, wobei eine Ölführungshülse im Kanal der Innenwelle eingebracht ist,
- Fig. 3
- ein Ausführungsbeispiel einer verstellbaren Nockenwelle mit einem Phasensteller, wobei eine Ölführungshülse gemäß einer alternativen Ausgestaltung in den zentralen Kanal eingebracht ist und
- Fig. 4
- ein Ausführungsbeispiel einer verstellbaren Nockenwelle mit einem Phasensteller, wobei zwei Ölführungshülsen konzentrisch ineinander liegend in dem Kanal in der Innenwelle eingebracht sind.
- Fig. 1
- A first embodiment of an adjustable camshaft with a phase adjuster, an oil channel being formed by a central channel in the inner shaft and another oil channel being formed by a radial gap between the inner shaft and the outer shaft,
- Fig. 2
- 2 shows a second exemplary embodiment of an adjustable camshaft with a phase adjuster, an oil guide sleeve being introduced into the channel of the inner shaft,
- Fig. 3
- an embodiment of an adjustable camshaft with a phase adjuster, wherein an oil guide sleeve according to an alternative embodiment is introduced into the central channel and
- Fig. 4
- an embodiment of an adjustable camshaft with a phase adjuster, wherein two oil guide sleeves are placed concentrically one inside the other in the channel in the inner shaft.
Die
Auf dem Ende 15 der Innenwelle 12 ist ein Verschraubungsflansch 16 aufgebracht, und der Rotor 17 des Phasenstellers 1 ist mit Schraubelementen 19 am Verschraubungsflansch 16 verschraubt. Der Stator 29 wird mittels des Rotors 17 um die Rotationsachse 13 geführt, und die Verbindung des Stators 29 mit dem Antriebsrad 28 weist eine Flexscheibe 35 auf. Die Flexscheibe 35 bildet dabei ein Nachgiebigkeitselement zwischen dem Stator 29 und dem Antriebsrad 28, wobei über die Flexscheibe 35 Drehmomente übertragen werden können.A
Im Bereich des Endes 15 der Innenwelle 12 ist ein Kanal 18 eingebracht, der außen mit der Stirnseite der Innenwelle 12 frei abschließt. Der Kanal 18 erstreckt sich dabei bis in einen Lagerabschnitt 14 der Nockenwelle 10 in die Innenwelle 12 hinein, sodass sich mehrere Möglichkeiten zur Druckmittelführung zwischen dem Lagerabschnitt 14 und dem Phasensteller 1 ergeben, wie im Einzelnen mit den jeweiligen Ausführungsbeispielen der Figuren nachfolgend dargestellt.In the area of the
Die jeweiligen Ölkanäle 23 und 24 münden im Bereich des Lagerabschnittes 14 zur Lagerung der Nockenwelle 10 in zugeordneten Radialkanälen 30. Das Ausführungsbeispiel zeigt damit die Möglichkeit auf, durch das einfache Einbringen einer Ölführungshülse 22 in einen zentralen Kanal 18 im Ende 15 der Innenwelle 12 bereits zwei getrennt voneinander verlaufende Ölkanäle 23 und 24 zu bilden, um den Phasensteller 1 anzusteuern.The
Schließlich zeigt
- 11
- PhasenstellerPhase adjuster
- 1010th
- Nockenwellecamshaft
- 1111
- AußenwelleOuter shaft
- 1212th
- InnenwelleInternal shaft
- 1313
- RotationsachseAxis of rotation
- 1414
- LagerabschnittStorage section
- 1515
- Ende der InnenwelleEnd of the inner shaft
- 1616
- VerschraubungsflanschScrew flange
- 1717th
- Rotorrotor
- 1818th
- Kanalchannel
- 1919th
- SchraubelementScrew element
- 2020th
- ÖlkanalOil channel
- 2121
- ÖlkanalOil channel
- 2222
- ÖlführungshülseOil guide sleeve
- 2323
- ÖlkanalOil channel
- 2424th
- ÖlkanalOil channel
- 2525th
- ÖlführungshülseOil guide sleeve
- 2626
- ÖlführungshülseOil guide sleeve
- 2727
- Ende der AußenwelleEnd of the outer shaft
- 2828
- Antriebsraddrive wheel
- 2929
- Statorstator
- 3030th
- RadialkanalRadial channel
- 3131
- ÖlkanalOil channel
- 3232
- ÖlkanalOil channel
- 3333
- ÖlkanalOil channel
- 3434
- ÖlkanalOil channel
- 3535
- FlexscheibeFlex disc
Claims (9)
- Adjustable camshaft (10) for the valve train of an internal combustion engine, comprising an outer shaft (11) and an inner shaft (12) which extends at least in sections within the outer shaft (11) and is rotatable relative to the outer shaft (11), and having a phase shifter (1), with which at least the outer shaft (11) or the inner shaft (12) is adjustable in a phase position formed around an axis of rotation (13), and wherein the camshaft (10) comprises a bearing portion (14) for bearing the camshaft (10), via which the phase shifter (1) can be supplied with a pressurizing medium, wherein the inner shaft (12) comprises a free end (15) on which a screw flange (16) is arranged and wherein a rotor (17) of the phase shifter (1) is connected to the screw flange (16), and wherein the free end (15) of the inner shaft (12) comprises a duct (18) which coincides with the axis of rotation (13) for at least partial supply of the phase shifter (1) with the pressurizing medium, which duct (18) extends at least into the bearing portion (14) and wherein the connection of the rotor (17) to the screw flange (16) comprises at least one screw element (19), characterized in that the screw element (19) is arranged spaced apart from the axis of rotation (13).
- Adjustable camshaft (10) according to Claim 1, characterized in that the screw flange (16) sits on the free end (15) of the inner shaft (12) so that the free end (15) extends centrally into the screw flange (16).
- Adjustable camshaft (10) according to any one of Claims 1 and 2, characterized in that at least in sections an annular gap is formed between the outer shaft (11) and the inner shaft (12), wherein the central duct (18) forms a first oil duct (20) and the annular gap forms a second oil duct (21) to supply the phase shifter (1). (Fig. 1)
- Adjustable camshaft (10) according to any one of the above-mentioned claims, characterized in that at least one oil-guidance sleeve (22) is incorporated in the duct (18) while forming an annular gap between the outer surface of the oil-guidance sleeve (22) and the inner surface of the duct (18), wherein the oil-guidance sleeve (22) forms an oil duct (23) on the inside and a further oil duct (24) with the annular gap. (Fig. 2 and Fig. 3)
- Adjustable camshaft (10) according to any one of the above-mentioned claims, characterized in that a first oil-guidance sleeve (25) and at least one second oil-guidance sleeve (26) are incorporated in the duct (18), wherein the oil-guidance sleeves (25, 26) are arranged lying in one another concentrically to the axis of rotation (13).
- Adjustable camshaft (10) according to Claim 5, characterized in that the oil-guidance sleeves (25, 26) comprise different lengths and protrude with different depths into the duct (18) so that the oil ducts (31, 32, 33, 34) formed within and/or between and/or on the outside of the oil-guidance sleeves (25, 26) are fluidically connected to radial ducts (30), which are separated from one another, in the outer shaft (11) and/or in the inner shaft (12).
- Adjustable camshaft (10) according to any one of the above-mentioned claims, characterized in that at least one of the oil ducts (21, 24, 33, 34) is formed in sections in the screw flange (16).
- Adjustable camshaft (10) according to any one of the above-mentioned claims, characterized in that the rotor (17) of the phase shifter (1) is centered by means of the screw flange (16) about the axis of rotation (13) or that a flexible element is arranged between the rotor (17) of the phase shifter (1) and the screw flange (16), via which flexible element a torque can be transmitted while compensating for positional errors and the rotor (17) is centered in a stator (29) of the phase shifter (1).
- Adjustable camshaft (10) according to any one of the above-mentioned claims, characterized in that the outer shaft (11) comprises an end (27) on which a drive wheel (28) is arranged and wherein a stator (29) of the phase shifter (1) is at least indirectly connected to the drive wheel (28).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015113356.3A DE102015113356A1 (en) | 2015-08-13 | 2015-08-13 | Adjustable camshaft with a phase plate |
PCT/EP2016/068160 WO2017025356A1 (en) | 2015-08-13 | 2016-07-29 | Adjustable camshaft having a phase actuator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3334910A1 EP3334910A1 (en) | 2018-06-20 |
EP3334910B1 true EP3334910B1 (en) | 2020-04-22 |
Family
ID=56740196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16753846.1A Active EP3334910B1 (en) | 2015-08-13 | 2016-07-29 | Adjustable camshaft with camshaft phaser |
Country Status (5)
Country | Link |
---|---|
US (1) | US10683781B2 (en) |
EP (1) | EP3334910B1 (en) |
CN (1) | CN108026795A (en) |
DE (1) | DE102015113356A1 (en) |
WO (1) | WO2017025356A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3379042B1 (en) * | 2017-03-21 | 2019-12-04 | ECO Holding 1 GmbH | Camshaft device and camshaft adjuster for a camshaft device |
DE102018101972A1 (en) * | 2017-03-21 | 2018-09-27 | ECO Holding 1 GmbH | Camshaft adjuster for a camshaft device and camshaft device |
CN109590932B (en) * | 2018-12-19 | 2024-04-05 | 海力达汽车科技有限公司 | Phase regulator concentricity inflating adjusting clamp and device |
WO2020162016A1 (en) * | 2019-02-06 | 2020-08-13 | 日立オートモティブシステムズ株式会社 | Valve timing control device for internal combustion engine |
DE102020121509A1 (en) | 2020-08-17 | 2022-02-17 | ECO Holding 1 GmbH | Camshaft adjuster for a camshaft device and camshaft device |
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DE19757504B4 (en) * | 1997-12-23 | 2005-03-31 | Daimlerchrysler Ag | Built camshaft for an internal combustion engine |
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GB2423565A (en) * | 2005-02-23 | 2006-08-30 | Mechadyne Plc | Inner camshaft of SCP assembly receives drive via sleeve on outer tube |
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DE102006013829A1 (en) | 2006-03-23 | 2007-09-27 | Mahle International Gmbh | Adjustable camshaft for motor vehicle internal combustion engines has inner and outer shafts and a hydraulic adjusting device |
DE102006028611B4 (en) | 2006-06-22 | 2014-12-31 | Mahle International Gmbh | Adjustable camshaft |
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DE102008033230B4 (en) * | 2008-01-04 | 2010-05-27 | Hydraulik-Ring Gmbh | Double camshaft adjuster in layer construction |
DE102008032412A1 (en) * | 2008-07-10 | 2010-01-14 | Hydraulik-Ring Gmbh | Valve drive for internal combustion engine of motor vehicle, has outer camshaft, housing extension, rotor extension and coupling shaft piercing via separation layer, where inner camshaft and two camshafts ends in hydraulic area before layer |
EP2337932B1 (en) * | 2008-09-19 | 2013-08-07 | Borgwarner Inc. | Phaser built into a camshaft or concentric camshafts |
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DE102010033296A1 (en) * | 2010-08-04 | 2012-02-09 | Hydraulik-Ring Gmbh | Camshaft adjuster, especially with camshaft |
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2015
- 2015-08-13 DE DE102015113356.3A patent/DE102015113356A1/en not_active Withdrawn
-
2016
- 2016-07-29 US US15/752,328 patent/US10683781B2/en active Active
- 2016-07-29 WO PCT/EP2016/068160 patent/WO2017025356A1/en active Application Filing
- 2016-07-29 CN CN201680047737.6A patent/CN108026795A/en active Pending
- 2016-07-29 EP EP16753846.1A patent/EP3334910B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
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EP3334910A1 (en) | 2018-06-20 |
DE102015113356A1 (en) | 2017-02-16 |
WO2017025356A1 (en) | 2017-02-16 |
CN108026795A (en) | 2018-05-11 |
US20180238200A1 (en) | 2018-08-23 |
US10683781B2 (en) | 2020-06-16 |
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