EP2479387B1 - Device for changing the position of an incline of a camshaft relative to a crankshaft of a combustion engine - Google Patents

Device for changing the position of an incline of a camshaft relative to a crankshaft of a combustion engine Download PDF

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Publication number
EP2479387B1
EP2479387B1 EP20110189676 EP11189676A EP2479387B1 EP 2479387 B1 EP2479387 B1 EP 2479387B1 EP 20110189676 EP20110189676 EP 20110189676 EP 11189676 A EP11189676 A EP 11189676A EP 2479387 B1 EP2479387 B1 EP 2479387B1
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EP
European Patent Office
Prior art keywords
rotor
section
fluid
insert element
groove
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EP20110189676
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German (de)
French (fr)
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EP2479387A1 (en
Inventor
Stefan Schelter
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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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
    • 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 invention relates to a device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine, wherein the device comprises a driven by the crankshaft drive element and a non-rotatably connected to the camshaft rotor, wherein between the drive element and the rotor at least two hydraulic chambers are formed, which can be acted upon by a pressurized fluid in order to set a defined relative rotational position between the drive element and the rotor, and wherein between a pressure fluid source and the hydraulic chambers fluid channels are formed.
  • camshaft adjusting devices In internal combustion engines mostly camshaft adjusting devices are used, in particular those which operate hydraulically. Examples of this reveal the DE 198 29 049 A1 . US 5,931,126 and the US 2002/0038641 , If the camshaft adjuster - which is typical - works hydraulically, it has an impeller in which wings are molded or arranged. The wings are located in hydraulic chambers, which are incorporated in a drive element (also called external rotor or stator). By appropriate action on the respective side of the hydraulic chambers with hydraulic fluid, an adjustment of the inner rotor (connected to the camshaft) can take place relative to the outer rotor between an "early stop” and a "late stop”. At the same time the river becomes controlled by hydraulic oil through an electrically controlled directional control valve. The transmission of the rotational movement of the crankshaft to the outer rotor is usually via a gear, with which the outer rotor is rotatably connected.
  • a spring is often arranged, one end of which is supported directly or indirectly on the drive part and the other end directly or indirectly on the driven part, so that a provision of the drive or driven part is ensured in a basic position ,
  • a spring receiving space is formed in a camshaft adjuster.
  • camshaft adjuster It is possible according to an embodiment of the camshaft adjuster to provide a separate receiving space for the spring.
  • the advantage of this solution is a separation of the area of the spring from the oil supply and removal.
  • this requires a higher axial space and thus has a higher weight of the camshaft adjuster result.
  • stepped bores are necessary, which are expensive to produce.
  • camshaft adjuster provides that the spring receiving chamber is traversed by oil in its path into the hydraulic chambers (integrated spring housing).
  • a disadvantage of this solution is that more oil is needed for the supply of hydraulic chambers, since the spring receiving space must first be filled. Furthermore, it is negative that dirt or chips, which may be incurred during assembly, can get into the oil circuit.
  • the oil supply of the two hydraulic chambers in the camshaft adjuster is restricted by bores.
  • a depression that would pass through one of the two supply holes is beneficial to the weight of the phaser, however, the system requires at engine start through the volume thus created in the rotor more oil that can slow the system until the spring or the weight-relief chamber is filled with oil.
  • the present invention has the object, a device of the type mentioned in such a way that it is possible to avoid the disadvantages mentioned. Accordingly, a small axial space and thus a low weight of the camshaft adjuster should be achieved.
  • the fluid channels to the hydraulic chambers should be able to be easily configured. Special attention is also paid to avoid contamination of the oil circuit by dirt or chips during assembly.
  • the solution of this problem by the invention is characterized in that at least a portion of at least one fluid channel is formed between an end region of the rotor and an insert element which is fastened to the frontal region of the rotor. At least one radially extending fluid channel portion is formed as a groove in a first end portion of the rotor. At least one further radially extending fluid channel section is formed as a groove in a second end section of the rotor, which is arranged offset axially relative to the first end section.
  • the insert element is preferably designed as a pot-shaped component.
  • It may be arranged with a centering portion in an annular groove-shaped recess at the axial end of the rotor.
  • the insert element may have an annular receptacle. This is preferably provided for in order to arrange a spring element, in particular a torsion spring.
  • At least one axially extending fluid channel section may be formed as a groove in a first section of the rotor extending in the axial direction in its frontal region. At least one further axially extending fluid channel section may be formed as a groove in a second axially extending section of the rotor in its frontal region, which is arranged offset radially relative to the first axially extending section.
  • the insert element is preferably formed as a thin-walled part. It is made of metal or plastic. In the case of training as a plastic molded part of the injection molding process is usually used. In the embodiment of sheet metal stamping and / or thermoforming processes can be used for forming the insert element.
  • the insert element in particular as a shaped sheet, one uses the space created in the rotor to place the spring and additionally to transport the oil supply directly via grooves in the rotor in the respective hydraulic chamber of the camshaft adjuster, without having to fill the space with oil ,
  • the rotor is preferably provided with a recessed, uninterrupted shoulder (ringnutförmige recess).
  • the insert element which forms a dirt sheet, can be installed flush in the rotor.
  • inexpensive and highly accurate machining eg by grinding
  • the resulting annular surfaces are used for sealing of the oil flow. The oil leakage is reduced by reducing the gap or by the use of sealing elements.
  • the mentioned spring is not mandatory; they can also be dispensed with in appropriate designs. This results in additional weight advantages over conventional weight-saving measures.
  • the weight of the camshaft adjuster can be minimized.
  • Fig. 1 and Fig. 2 is a first embodiment of a device 1 for changing the relative angular position of a camshaft 2 relative to a crankshaft of an internal combustion engine shown, so a camshaft adjuster.
  • the camshaft actuator 1 has in a known manner a drive element 3 (sometimes referred to as outer rotor or stator) and a rotor 4, which can rotate relative to the stator.
  • the rotor is in Fig. 5 shown.
  • a plurality of hydraulic chambers are formed between the drive element and the rotor, which are divided by wings 4 arranged on the rotor 19, so that hydraulic chambers 5 and 6 are formed.
  • the relative rotation between the drive element 3 and the rotor 4 takes place.
  • a fluid channel 7 consists of several fluid channel sections 7 ', 7'',7''', 7 '''', 7 '''' and 7 '''''', as can be seen from the figures. It is essential that in any case a portion of the fluid channel 7 between an end region 8 of the rotor 4 and an insert element 9 is formed, which is fixed to the frontal region 8 of the rotor 4.
  • the insert element 9 consists in the present case of a rotationally symmetrical component, in particular of a deep-drawn sheet metal part, which has a shape as shown in the radial section Fig. 1 is apparent.
  • a ringnutförmige recess 11 is incorporated; the insert element 9 has a radially outer centering section 10, which is designed to match the annular groove-shaped recess 11, so that the insert element 9 can be accurately placed and centered in the frontal region 8 of the rotor 4 and fixed.
  • the shape of the insert element 9 makes it possible to provide an annular receptacle (with a substantially rectangular shape in radial section) in which a spring element 14 in the form of a torsion spring is inserted.
  • the formation of the individual fluid channel sections results from the synopsis of FIGS. 1 . 2 and 5 ,
  • the rotor 4 has a first end-side section 15 and a second end-face section 16 axially offset therefrom (see FIG. Fig. 5 ).
  • the rotor 4 has a first axially extending portion 17 and a radially offset second axially extending portion 18 thereto.
  • fluid channel sections 7 "" into section 15, fluid channel sections 7 "into section 16, fluid channel sections 7" into section 17, and fluid channel sections 7 "” are incorporated into section 18, four fluid channel sections each each of the aforementioned type, evenly distributed over the circumference to supply the corresponding four hydraulic chambers 5, 6 with oil.
  • said fluid channel sections are delimited on the front side or radially, so that oil can be transported in them. Oil from a pressure oil source, not shown, can thus reach back into the hydraulic chambers 5 and 6 or from them.
  • the entire assembly can be held together by a central screw 20 passing through a bore in the insert element 9.
  • the insert element 9 may have a Federeinhfitungsausnaturalung, which may be made by forming.
  • a corresponding Federeinhfitungsausnaturalung be provided in the rotor 4.

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

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft eine Vorrichtung zur Veränderung der relativen Winkellage einer Nockenwelle gegenüber einer Kurbelwelle einer Brennkraftmaschine, wobei die Vorrichtung ein von der Kurbelwelle angetriebenes Antriebselement und einen mit der Nockenwelle drehfest verbundenen Rotor aufweist, wobei zwischen dem Antriebselement und dem Rotor mindestens zwei Hydraulikkammern ausgebildet sind, die mit einem Druckfluid beaufschlagbar sind, um eine definierte relative Drehstellung zwischen dem Antriebselement und dem Rotor einzustellen, und wobei zwischen einer Druckfluidquelle und den Hydraulikkammern Fluidkanäle ausgebildet sind.The invention relates to a device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine, wherein the device comprises a driven by the crankshaft drive element and a non-rotatably connected to the camshaft rotor, wherein between the drive element and the rotor at least two hydraulic chambers are formed, which can be acted upon by a pressurized fluid in order to set a defined relative rotational position between the drive element and the rotor, and wherein between a pressure fluid source and the hydraulic chambers fluid channels are formed.

Hintergrund der ErfindungBackground of the invention

In Brennkraftmaschinen werden zumeist Nockenwellenverstellvorrichtungen eingesetzt, insbesondere solche, die hydraulisch arbeiten. Beispiele hierfür offenbaren die DE 198 29 049 A1 , US 5 931 126 und die US 2002/0038641 . Sofern der Nockenwellenversteller - was typisch ist - hydraulisch arbeitet, weist er ein Flügelrad auf, in dem Flügel eingeformt oder angeordnet sind. Die Flügel befinden sich in Hydraulikkammern, die in einem Antriebselement (auch Außenrotor oder Stator genannt) eingearbeitet sind. Durch entsprechende Beaufschlagung der jeweiligen Seite der Hydraulikkammern mit Hydraulikfluid kann eine Verstellung des Innenrotors (mit der Nockenwelle verbunden) relativ zum Außenrotor zwischen einem "Frühanschlag" und einem "Spätanschlag" erfolgen. Dabei wird der Fluss von Hydrauliköl durch ein elektrisch angesteuertes Wegeventil gesteuert. Die Übertragung der Drehbewegung der Kurbelwelle auf den Außenrotor erfolgt zumeist über ein Zahnrad, mit dem der Außenrotor drehfest verbunden ist.In internal combustion engines mostly camshaft adjusting devices are used, in particular those which operate hydraulically. Examples of this reveal the DE 198 29 049 A1 . US 5,931,126 and the US 2002/0038641 , If the camshaft adjuster - which is typical - works hydraulically, it has an impeller in which wings are molded or arranged. The wings are located in hydraulic chambers, which are incorporated in a drive element (also called external rotor or stator). By appropriate action on the respective side of the hydraulic chambers with hydraulic fluid, an adjustment of the inner rotor (connected to the camshaft) can take place relative to the outer rotor between an "early stop" and a "late stop". At the same time the river becomes controlled by hydraulic oil through an electrically controlled directional control valve. The transmission of the rotational movement of the crankshaft to the outer rotor is usually via a gear, with which the outer rotor is rotatably connected.

Zwischen Antriebs- und Abtriebsteil des Nockenwellenverstellers ist häufig eine Feder angeordnet, deren eines Ende direkt oder indirekt an dem Antriebsteil und deren anderes Ende direkt oder indirekt an dem Abtriebsteil abgestützt ist, so dass eine Rückstellung des Antriebs- bzw. Abtriebsteils in eine Grundposition gewährleistet ist. Zur Aufnahme der Feder ist in einem Nockenwellenversteller ein Federaufnahmeraum ausgebildet. Eine solche Lösung zeigt die DE 10 2008 051 142 A1 . Between the input and output part of the camshaft adjuster a spring is often arranged, one end of which is supported directly or indirectly on the drive part and the other end directly or indirectly on the driven part, so that a provision of the drive or driven part is ensured in a basic position , To accommodate the spring, a spring receiving space is formed in a camshaft adjuster. Such a solution shows the DE 10 2008 051 142 A1 ,

Dabei ist es gemäß einer Ausgestaltung des Nockenwellenverstellers möglich, einen separaten Aufnahmeraum für die Feder vorzusehen. Der Vorteil dieser Lösung ist eine Trennung des Bereichs der Feder von der Ölzu- und -abführung. Dies erfordert allerdings einen höheren axialen Bauraum und hat somit ein höheres Gewicht des Nockenwellenverstellers zur Folge. Weiterhin sind für die Ölzu- und -abführung Stufenbohrungen nötig, die aufwändig herzustellen sind.It is possible according to an embodiment of the camshaft adjuster to provide a separate receiving space for the spring. The advantage of this solution is a separation of the area of the spring from the oil supply and removal. However, this requires a higher axial space and thus has a higher weight of the camshaft adjuster result. Furthermore, for the oil supply and removal stepped bores are necessary, which are expensive to produce.

Eine andere Ausgestaltung des Nockenwellenverstellers sieht vor, dass die Federaufnahmekammer von Öl bei dessen Weg in die Hydraulikkammern durchströmt wird (integrierte Federunterbringung). Nachteilig ist bei dieser Lösung, dass mehr Öl für die Versorgung der Hydraulikkammern nötig ist, da der Federaufnahmeraum erst befüllt werden muss. Weiterhin ist es negativ, dass Schmutz oder Späne, die bei der Montage anfallen können, in den Ölkreislauf gelangen können.Another embodiment of the camshaft adjuster provides that the spring receiving chamber is traversed by oil in its path into the hydraulic chambers (integrated spring housing). A disadvantage of this solution is that more oil is needed for the supply of hydraulic chambers, since the spring receiving space must first be filled. Furthermore, it is negative that dirt or chips, which may be incurred during assembly, can get into the oil circuit.

Um gewichtsreduzierende Maßnahmen am Rotor des Nockenwellenverstellers vorzunehmen, ist die Ölversorgung der beiden Hydraulikkammern im Nockenwellenversteller durch Bohrungen eingeschränkt. Eine Vertiefung, die durch eine der beiden Versorgungsbohrungen gehen würde, ist für das Gewicht des Nockenwellenverstellers von Vorteil, allerdings benötigt das System beim Motorstart durch das so geschaffene Volumen im Rotor mehr Öl, das das System verlangsamen kann, bis die Feder bzw. die Gewichtserleichterungskammer mit Öl befüllt ist.In order to carry out weight-reducing measures on the rotor of the camshaft adjuster, the oil supply of the two hydraulic chambers in the camshaft adjuster is restricted by bores. A depression that would pass through one of the two supply holes is beneficial to the weight of the phaser, however, the system requires at engine start through the volume thus created in the rotor more oil that can slow the system until the spring or the weight-relief chamber is filled with oil.

Aufgabe der ErfindungObject of the invention

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so fortzubilden, dass es möglich ist, die genannten Nachteile zu vermeiden. Demgemäß soll ein geringer axialer Bauraum und damit ein geringes Gewicht des Nockenwellenverstellers erreicht werden. Die Fluidkanäle zu den Hydraulikkammern sollen einfach ausgestaltet werden können. Ein besonderes Augenmerk ist auch darauf gerichtet, dass eine Verschmutzung des Ölkreislaufs durch Schmutz oder Spanbildung während der Montage vermieden werden soll.The present invention has the object, a device of the type mentioned in such a way that it is possible to avoid the disadvantages mentioned. Accordingly, a small axial space and thus a low weight of the camshaft adjuster should be achieved. The fluid channels to the hydraulic chambers should be able to be easily configured. Special attention is also paid to avoid contamination of the oil circuit by dirt or chips during assembly.

Zusammenfassung der ErfindungSummary of the invention

Die Lösung dieser Aufgabe durch die Erfindung ist dadurch gekennzeichnet, dass zumindest ein Abschnitt mindestens eines Fluidkanals zwischen einem stirnseitigen Bereich des Rotors und einem Einsatzelement ausgebildet ist, das am stirnseitigen Bereich des Rotors befestigt ist. Mindestens ein sich radial erstreckender Fluidkanalabschnitt ist als Nut in einem ersten stirnseitigen Abschnitt des Rotors ausgebildet. Mindestens ein weiterer sich radial erstreckender Fluidkanalabschnitt ist als Nut in einem zweiten stirnseitigen Abschnitt des Rotors ausgebildet, der relativ zum ersten stirnseitigen Abschnitt axial versetzt angeordnet ist.
Das Einsatzelement ist bevorzugt als topfförmiges Bauteil ausgebildet.The solution of this problem by the invention is characterized in that at least a portion of at least one fluid channel is formed between an end region of the rotor and an insert element which is fastened to the frontal region of the rotor. At least one radially extending fluid channel portion is formed as a groove in a first end portion of the rotor. At least one further radially extending fluid channel section is formed as a groove in a second end section of the rotor, which is arranged offset axially relative to the first end section.
The insert element is preferably designed as a pot-shaped component.

Es kann mit einem Zentrierabschnitt in einer ringnutförmigen Ausnehmung am axialen Ende des Rotors angeordnet sein.It may be arranged with a centering portion in an annular groove-shaped recess at the axial end of the rotor.

Das Einsatzelement kann eine ringförmige Aufnahme aufweisen. Diese ist bevorzugt dafür vorgesehen, um in ihr ein Federelement, insbesondere eine Torsionsfeder, anzuordnen.The insert element may have an annular receptacle. This is preferably provided for in order to arrange a spring element, in particular a torsion spring.

Ferner kann mindestens ein sich axial erstreckender Fluidkanalabschnitt als Nut in einem ersten sich in axialer Richtung erstreckenden Abschnitt des Rotors in dessen stirnseitigem Bereich ausgebildet sein. Mindestens ein weiterer sich axial erstreckender Fluidkanalabschnitt kann als Nut in einem zweiten sich in axialer Richtung erstreckenden Abschnitt des Rotors in dessen stirnseitigem Bereich ausgebildet ist, der relativ zum ersten sich in axiale Richtung erstreckenden Abschnitt radial versetzt angeordnet ist.Furthermore, at least one axially extending fluid channel section may be formed as a groove in a first section of the rotor extending in the axial direction in its frontal region. At least one further axially extending fluid channel section may be formed as a groove in a second axially extending section of the rotor in its frontal region, which is arranged offset radially relative to the first axially extending section.

Das Einsatzelement ist bevorzugt als dünnwandiges Teil ausgebildet. Es besteht aus Metall oder aus Kunststoff. Im Falle der Ausbildung als Kunststoffformteil wird in der Regel der Spritzgießprozess eingesetzt. Bei der Ausführung aus Blech können Stanz- und/oder Tiefziehprozesse zur Formung des Einsatzelements eingesetzt werden.The insert element is preferably formed as a thin-walled part. It is made of metal or plastic. In the case of training as a plastic molded part of the injection molding process is usually used. In the embodiment of sheet metal stamping and / or thermoforming processes can be used for forming the insert element.

Durch die Verwendung des Einsatzelements, insbesondere als geformtes Blech, nutzt man den im Rotor geschaffenen Freiraum, um die Feder zu platzieren und zusätzlich die Ölversorgung direkt über Nuten im Rotor in die jeweilige Hydraulikkammer des Nockenwellenverstellers zu transportieren, ohne den Freiraum mit Öl befüllen zu müssen.By using the insert element, in particular as a shaped sheet, one uses the space created in the rotor to place the spring and additionally to transport the oil supply directly via grooves in the rotor in the respective hydraulic chamber of the camshaft adjuster, without having to fill the space with oil ,

Weiterhin werden Schmutz oder Späne, die bei der Montage des Nockenwellenverstellers entstehen, nicht dem Ölkreislauf zugeführt, sondern durch das Einsatzelement abgehalten.Furthermore, dirt or chips that arise during assembly of the camshaft adjuster, not supplied to the oil circuit, but held by the insert element.

Der Rotor ist dabei bevorzugt mit einem vertieften, ununterbrochenen Absatz versehen (ringnutförmige Ausnehmung). Dadurch lässt sich das Einsatzelement, das ein Schmutzblech bildet, plan in den Rotor einbauen. Hierdurch ist eine kostengünstige und hochgenaue Bearbeitung (z. B. durch Schleifen) der Rotorstirnfläche möglich. Die somit entstandenen Ringflächen dienen zur Abdichtung des Ölflusses. Die Ölleckage wird durch Reduzierung der Spaltmaße oder durch den Einsatz von Dichtelementen reduziert.The rotor is preferably provided with a recessed, uninterrupted shoulder (ringnutförmige recess). As a result, the insert element, which forms a dirt sheet, can be installed flush in the rotor. As a result, inexpensive and highly accurate machining (eg by grinding) of the rotor end face is possible. The resulting annular surfaces are used for sealing of the oil flow. The oil leakage is reduced by reducing the gap or by the use of sealing elements.

Durch eine Änderung der Geometrie am Einsatzelement ist eine vielfältige Variantenmöglichkeit gegeben; hiermit ist auch eine Verwechslungsgefahr bei der Montage nicht gegeben.By changing the geometry of the insert element a variety of options is given; This is also a likelihood of confusion during assembly is not given.

Die erwähnte Feder ist nicht zwingend; auf sie kann bei entsprechenden Bauformen auch verzichtet werden. Hierdurch ergeben sich zusätzliche Gewichtsvorteile gegenüber herkömmlichen Gewichtserleichterungsmaßnahmen.The mentioned spring is not mandatory; they can also be dispensed with in appropriate designs. This results in additional weight advantages over conventional weight-saving measures.

Insgesamt ergibt sich somit durch den Einsatz des Einsatzelements beim Montageprozess keine Gefahr einer Verschmutzung des Ölkreislaufes. Eine ununterbrochene Ölversorgung ist auch bei Vorliegen der innenliegenden Feder gegeben.Overall, there is thus no risk of contamination of the oil circuit through the use of the insert element during the assembly process. An uninterrupted supply of oil is also given in the presence of the internal spring.

Das Gewicht des Nockenwellenverstellers kann so minimiert werden.The weight of the camshaft adjuster can be minimized.

Beim Motorstart ist weniger Öl notwendig.When starting the engine, less oil is needed.

Kurze Beschreibung der FigurenBrief description of the figures

In den Zeichnungen sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:

Fig. 1
in einer Radialschnittdarstellung einen Nockenwellenversteller einer Brennkraftmaschine gemäß einer ersten Ausführungsform der Erfindung, und zwar den Schnitt C-D gemäß Fig. 2,
Fig. 2
den Schnitt A-B gemäß Fig. 1 durch den Nockenwellenversteller,
Fig. 3
in einer Radialschnittdarstellung den Nockenwellenversteller gemäß einer zweiten Ausführungsform der Erfindung, und zwar den Schnitt C-D gemäß Fig. 4,
Fig. 4
den Schnitt A-B gemäß Fig. 3 durch den Nockenwellenversteller und
Fig. 5
in perspektivischer Darstellung den Rotor des Nockenwellenverstellers.
In the drawings, embodiments of the invention are shown. Show it:
Fig. 1
in a radial sectional view of a phaser of an internal combustion engine according to a first embodiment of the invention, namely the section CD according to Fig. 2 .
Fig. 2
the section AB according to Fig. 1 through the phaser,
Fig. 3
in a radial sectional view of the camshaft adjuster according to a second embodiment of the invention, namely the section CD according to Fig. 4 .
Fig. 4
the section AB according to Fig. 3 through the camshaft adjuster and
Fig. 5
in a perspective view of the rotor of the camshaft adjuster.

Ausführliche Beschreibung der FigurenDetailed description of the figures

In Fig. 1 und Fig. 2 ist eine erste Ausführungsform einer Vorrichtung 1 zur Veränderung der relativen Winkellage einer Nockenwelle 2 gegenüber einer Kurbelwelle einer Brennkraftmaschine dargestellt, also ein Nockenwellenversteller. Der Nockenwellensteller 1 hat dabei in bekannter Weise ein Antriebselement 3 (gelegentlich als Außenrotor oder Stator bezeichnet) und einen Rotor 4, der sich relativ zum Stator verdrehen kann. Der Rotor ist in Fig. 5 dargestellt. Zu Details wird ausdrücklich auf die oben genannten Druckschriften hingewiesen, wo auch Ausführungen zur generellen Betriebsweise des Nockenwellenverstellers zu finden sind.In Fig. 1 and Fig. 2 is a first embodiment of a device 1 for changing the relative angular position of a camshaft 2 relative to a crankshaft of an internal combustion engine shown, so a camshaft adjuster. The camshaft actuator 1 has in a known manner a drive element 3 (sometimes referred to as outer rotor or stator) and a rotor 4, which can rotate relative to the stator. The rotor is in Fig. 5 shown. For details, reference is expressly made to the above-mentioned publications, where also explanations of the general operation of the camshaft adjuster can be found.

Um eine relative Verdrehung zwischen Antriebselement 3 und Rotor 4 zu bewerkstelligen, sind mehrere Hydraulikkammern zwischen Antriebselement und Rotor ausgebildet, die durch am Rotor 4 angeordnete Flügel 19 unterteilt sind, so dass sich Hydraulikkammern 5 und 6 bilden. In Abhängigkeit von der Beschickung der Hydraulikkammern 5 und 6 erfolgt die relative Verdrehung zwischen Antriebselement 3 und Rotor 4.In order to accomplish a relative rotation between the drive element 3 and the rotor 4, a plurality of hydraulic chambers are formed between the drive element and the rotor, which are divided by wings 4 arranged on the rotor 19, so that hydraulic chambers 5 and 6 are formed. Depending on the charge of the hydraulic chambers 5 and 6, the relative rotation between the drive element 3 and the rotor 4 takes place.

Das hierfür benötigte Hydrauliköl wird über Fluidkanäle 7 der jeweiligen Kammer 5, 6 zugeführt. Ein Fluidkanal 7 besteht aus mehreren Fluidkanalabschnitten 7', 7'', 7''', 7'''', 7''''' und 7'''''', wie es aus den Figuren hervorgeht. Wesentlich ist, dass jedenfalls ein Abschnitt des Fluidkanals 7 zwischen einem stirnseitigen Bereich 8 des Rotors 4 und einem Einsatzelement 9 ausgebildet ist, das am stirnseitigen Bereich 8 des Rotors 4 befestigt ist.The hydraulic oil required for this purpose is supplied via fluid channels 7 of the respective chamber 5, 6. A fluid channel 7 consists of several fluid channel sections 7 ', 7'',7''', 7 '''', 7 '''' and 7 '''''', as can be seen from the figures. It is essential that in any case a portion of the fluid channel 7 between an end region 8 of the rotor 4 and an insert element 9 is formed, which is fixed to the frontal region 8 of the rotor 4.

Das Einsatzelement 9 besteht vorliegend aus einem rotationssymmetrischen Bauteil, insbesondere aus einem tiefgezogenen Blechteil, das eine Form aufweist, wie es aus dem Radialschnitt gemäß Fig. 1 ersichtlich ist. Am axialen Ende 12 des Rotors 4 ist eine ringnutförmige Ausnehmung 11 eingearbeitet; das Einsatzelement 9 weist einen radial außenliegenden Zentrierabschnitt 10 auf, der passend zu der ringnutförmigen Ausnehmung 11 ausgeführt ist, so dass das Einsatzelement 9 passgenau und zentriert im stirnseitigen Bereich 8 des Rotors 4 platziert und befestigt werden kann.The insert element 9 consists in the present case of a rotationally symmetrical component, in particular of a deep-drawn sheet metal part, which has a shape as shown in the radial section Fig. 1 is apparent. At the axial end 12 of the rotor 4, a ringnutförmige recess 11 is incorporated; the insert element 9 has a radially outer centering section 10, which is designed to match the annular groove-shaped recess 11, so that the insert element 9 can be accurately placed and centered in the frontal region 8 of the rotor 4 and fixed.

Die Ausformung des Einsatzelements 9 ermöglicht es, dass eine ringförmige Aufnahme (mit im Radialschnitt im Wesentlichen in rechteckiger Form) geschaffen wird, in der ein Federelement 14 in Form einer Torsionsfeder eingesetzt ist.The shape of the insert element 9 makes it possible to provide an annular receptacle (with a substantially rectangular shape in radial section) in which a spring element 14 in the form of a torsion spring is inserted.

Die Ausbildung der einzelnen Fluidkanalabschnitte ergibt sich aus der Zusammenschau der Figuren 1, 2 und 5. Der Rotor 4 weist einen ersten stirnseitigen Abschnitt 15 und einen hierzu axial versetzten zweiten stirnseitigen Abschnitt 16 auf (s. Fig. 5). Gleichermaßen weist der Rotor 4 einen ersten sich axial erstreckenden Abschnitt 17 sowie einen radial hierzu versetzten zweiten sich axial erstreckenden Abschnitt 18 auf.The formation of the individual fluid channel sections results from the synopsis of FIGS. 1 . 2 and 5 , The rotor 4 has a first end-side section 15 and a second end-face section 16 axially offset therefrom (see FIG. Fig. 5 ). Likewise, the rotor 4 has a first axially extending portion 17 and a radially offset second axially extending portion 18 thereto.

Wie in Fig. 5 am besten zu erkennen ist, sind sich radial oder sich axial erstreckende Nuten in die Abschnitte 15, 16, 17 und 18 eingearbeitet, die die Fluidkanalabschnitte bilden. Konkret sind Fluidkanalabschnitte 7'''' in den Abschnitt 15, Fluidkanalabschnitte 7'' in den Abschnitt 16, Fluidkanalabschnitte 7''' in den Abschnitt 17 und Fluidkanalabschnitte 7''''' in den Abschnitt 18 eingearbeitet, und zwar jeweils vier Fluidkanalabschnitt jeder der genannten Art, gleichmäßig über dem Umfang verteilt, um die entsprechenden vier Hydraulikkammern 5, 6 mit Öl zu versorgen.As in Fig. 5 best seen, are radially or axially extending grooves in the sections 15, 16, 17 and 18 incorporated, which form the fluid channel sections. Specifically, fluid channel sections 7 "" into section 15, fluid channel sections 7 "into section 16, fluid channel sections 7" into section 17, and fluid channel sections 7 "" are incorporated into section 18, four fluid channel sections each each of the aforementioned type, evenly distributed over the circumference to supply the corresponding four hydraulic chambers 5, 6 with oil.

Wird das Einsatzelement 9 montiert, werden die genannten Fluidkanalabschnitte stirnseitig bzw. radial begrenzt, so dass in ihnen Öl transportiert werden kann. Öl von einer nicht dargestellten Druckölquelle kann somit bis in die Hydraulikkammern 5 bzw. 6 oder aus ihnen zurück gelangen.If the insert element 9 is mounted, said fluid channel sections are delimited on the front side or radially, so that oil can be transported in them. Oil from a pressure oil source, not shown, can thus reach back into the hydraulic chambers 5 and 6 or from them.

Die gesamte Anordnung kann durch eine Zentralschraube 20 zusammengehalten werden, die eine Bohrung im Einsatzelement 9 durchsetzt.The entire assembly can be held together by a central screw 20 passing through a bore in the insert element 9.

Für die Festlegung des Federelements 14 kann das Einsatzelement 9 eine Federeinhängungsausnehmung aufweisen, die mittels Umformung hergestellt sein kann. Gegebenenfalls kann auch im Rotor 4 eine entsprechende Federeinhängungsausnehmung vorgesehen werden.For the determination of the spring element 14, the insert element 9 may have a Federeinhängungsausnehmung, which may be made by forming. Optionally, a corresponding Federeinhängungsausnehmung be provided in the rotor 4.

Fertigungstechnisch kann es vorteilhaft sein, wenn mittels eines Sinterverfahrens die benötigten Nuten und ggf. Ausnehmungen hergestellt werden. Hiernach werden also durch ein Sinterverfahren sowohl die Ölnuten (d. h. die genannten Fluidkanalabschnitte) als auch die optionale Federeinhängungsausnehmung hergestellt. Eine nachträgliche Bearbeitung wird in diesem Falle überflüssig.Manufacturing technology, it may be advantageous if the required grooves and recesses are made by means of a sintering process. After that, both the oil grooves (ie the fluid channel sections mentioned) and the optional spring suspension recess are produced by a sintering process. Subsequent processing becomes superfluous in this case.

In den Figuren 3 und 4 ist eine Alternative dargestellt, die sich im Wesentlichen nur dadurch unterscheidet, dass kein Federelement 14 vorhanden ist. Dennoch ist das Einsatzelement 9 gleich ausgebildet. Die also weiter vorhandene ringförmige Aufnahme 13 erfüllt die Funktion, dass der mit Öl zu füllende Raum gering gehalten wird.In the Figures 3 and 4 an alternative is shown, which differs essentially only in that no spring element 14 is present. Nevertheless, the insert element 9 is the same. The thus existing annular receptacle 13 fulfills the function that the space to be filled with oil is kept low.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11 Vorrichtung zur Veränderung der relativen Winkellage (Nockenwellenversteller)Device for changing the relative angular position (camshaft adjuster) 22 Nockenwellecamshaft 33 Antriebselementdriving element 44 Rotorrotor 55 Hydraulikkammerhydraulic chamber 66 Hydraulikkammerhydraulic chamber 77 Fluidkanalfluid channel 7'7 ' FluidkanalabschnittFluid channel section 7''7 '' FluidkanalabschnittFluid channel section 7'''7 '' ' FluidkanalabschnittFluid channel section 7''''7 '' '' FluidkanalabschnittFluid channel section 7'''''7 '' '' ' FluidkanalabschnittFluid channel section 7''''''7 '' '' '' FluidkanalabschnittFluid channel section 88th stirnseitiger Bereich des Rotorsfrontal area of the rotor 99 Einsatzelementinsert element 1010 Zentrierabschnittcentering 1111 ringnutförmige Ausnehmungringnutförmige recess 1212 axiales Ende des Rotorsaxial end of the rotor 1313 ringförmige Aufnahmeannular recording 1414 Federelementspring element 1515 erster stirnseitiger Abschnitt des Rotorsfirst frontal section of the rotor 1616 zweiter stirnseitiger Abschnitt des Rotorssecond frontal section of the rotor 1717 erster sich axial erstreckender Abschnitt des Rotorsfirst axially extending portion of the rotor 1818 zweiter sich axial erstreckender Abschnitt des Rotorssecond axially extending portion of the rotor 1919 Flügelwing 2020 Zentralschraubecentral screw

Claims (8)

  1. Apparatus (1) for changing the relative angular position of a camshaft (2) with respect to a crankshaft of an internal combustion engine, the apparatus (1) having a drive element (3) which is driven by the crankshaft and a rotor (4) which is connected fixedly to the camshaft (2) so as to rotate with it, at least two hydraulic chambers (5, 6) which can be loaded with a pressure fluid being formed between the drive element (3) and the rotor (4), in order to set a defined relative rotational position between the drive element (3) and the rotor (4), fluid channels (7) being formed between a pressure-fluid source and the hydraulic chambers (5, 6), at least one section of at least one fluid channel (7) being formed between an end-side region (8) of the rotor (4) and an insert element (9) which is fastened to the end-side region (8) of the rotor (4), and at least one radially extending fluid-channel section (7'''') being formed as a groove in a first end-side section (15) of the rotor (4), characterized in that at least one further radially extending fluid-channel section (7'') is formed as a groove in the second end-side section (16) of the rotor (4), which section (16) is arranged offset axially relative to the first end-side section (15).
  2. Apparatus (1) according to Claim 1, characterized in that the insert element (9) is configured as a cup-shaped component.
  3. Apparatus (1) according to Claim 1, characterized in that the insert element (9) is arranged with a centring section (10) in a recess (11) in the shape of an annular groove at the axial end (12) of the rotor (4).
  4. Apparatus (1) according to Claim 1, characterized in that the insert element (9) has an annular receptacle (13).
  5. Apparatus (1) according to Claim 4, characterized in that a spring element (14), in particular a torsion spring, is arranged in the annular receptacle (13).
  6. Apparatus (1) according to Claim 1, characterized in that at least one axially extending fluid-channel section (7'''') is formed as a groove in a first section (17) of the rotor (4) in its end-side region (8), which section (17) extends in the axial direction.
  7. Apparatus (1) according to Claim 6, characterized in that at least one axially extending fluid-channel section (7''''') is formed as a groove in a second section (18) of the rotor (4) in its end-side region (8), which section (18) extends in the axial direction and is arranged offset radially relative to the first section (17) which extends in the axial direction.
  8. Apparatus (1) according to Claim 1, characterized in that the insert element (9) is configured as a thin-walled part which is composed of metal or plastic.
EP20110189676 2011-01-24 2011-11-18 Device for changing the position of an incline of a camshaft relative to a crankshaft of a combustion engine Not-in-force EP2479387B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110003053 DE102011003053A1 (en) 2011-01-24 2011-01-24 Device for changing the relative angular position of a camshaft relative to a crankshaft of an internal combustion engine

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EP2479387A1 EP2479387A1 (en) 2012-07-25
EP2479387B1 true EP2479387B1 (en) 2013-06-05

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DE102016217968A1 (en) 2016-09-20 2018-03-22 Schaeffler Technologies AG & Co. KG Centering connection of a trigger wheel with a rotor in a phaser

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69601916T3 (en) 1995-11-30 2003-04-24 Aisin Seiki K.K., Kariya Internal combustion engine with a valve timing control device
JP3262207B2 (en) * 1996-10-02 2002-03-04 株式会社デンソー Valve timing adjustment device for internal combustion engine
JPH10159518A (en) * 1996-12-02 1998-06-16 Toyota Motor Corp Valve timing controlling device for internal combustion engine
JP3824110B2 (en) 1997-06-30 2006-09-20 アイシン精機株式会社 Valve timing control device
JP4389259B2 (en) * 2000-10-03 2009-12-24 株式会社デンソー Valve timing adjustment device
DE102005041393A1 (en) * 2005-09-01 2007-03-08 Schaeffler Kg Control valve for a device for changing the timing of an internal combustion engine
DE112007002915B4 (en) * 2006-12-04 2020-10-29 Daimler Ag Adjustment device for phase adjustment of a camshaft
DE102008051142B4 (en) 2008-10-09 2021-02-11 Schaeffler Technologies AG & Co. KG Camshaft adjuster
DE102009041768B4 (en) * 2008-10-09 2020-10-08 Schaeffler Technologies AG & Co. KG Camshaft adjuster for a concentric camshaft

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DE102011003053A1 (en) 2012-07-26

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