DE102008022009A1 - Cam shaft adjusting device for internal-combustion engine of motor vehicle, has operating chambers connected by pressurizing medium connections that form groove assigned to piston and/or stator - Google Patents
Cam shaft adjusting device for internal-combustion engine of motor vehicle, has operating chambers connected by pressurizing medium connections that form groove assigned to piston and/or stator Download PDFInfo
- Publication number
- DE102008022009A1 DE102008022009A1 DE200810022009 DE102008022009A DE102008022009A1 DE 102008022009 A1 DE102008022009 A1 DE 102008022009A1 DE 200810022009 DE200810022009 DE 200810022009 DE 102008022009 A DE102008022009 A DE 102008022009A DE 102008022009 A1 DE102008022009 A1 DE 102008022009A1
- Authority
- DE
- Germany
- Prior art keywords
- stator
- piston
- adjusting device
- rotor
- camshaft adjusting
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
-
- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- 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
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
- F01L2001/34453—Locking means between driving and driven members
- F01L2001/34469—Lock movement parallel to camshaft axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Gebiet der ErfindungField of the invention
Die Erfindung betrifft eine Nockenwellenverstelleinrichtung für eine Brennkraftmaschine eines Kraftfahrzeuges.The The invention relates to a camshaft adjusting device for an internal combustion engine a motor vehicle.
Nockenwellenverstelleinrichtungen für Brennkraftmaschinen von Kraftfahrzeugen besitzen grundsätzlich einen Aufbau mit einem über eine Kurbelwelle der Brennkraftmaschine antreibbaren Stator, und einem mit der Nockenwelle drehfest verbundenen Rotor. Die eigentliche Verstelleinrichtung befindet sich zwischen dem Stator und dem Rotor und hat die Aufgabe die relative Drehlage zwischen dem Rotor und dem Stator zu verändern, wobei die Ansteuerung durch Druckbeaufschlagung eines Systems aus Arbeitskammern mit einem Druckmittel erfolgt.Camshaft actuators for internal combustion engines of motor vehicles basically have a structure with one over one Crankshaft of the internal combustion engine drivable stator, and a rotatably connected to the camshaft rotor. The real one Adjustment device is located between the stator and the rotor and has the task the relative rotational position between the rotor and to change the stator, wherein the activation by pressurizing a system Working chambers with a pressure medium takes place.
Eine Ausführungsform der Nockenwellenverstelleinrichtungen besteht darin, dass der Rotor einen Drehflügelkolben aufweist, der einen Hohlraum in dem Stator in verschiedene Arbeitskammern unterteilt. Die Arbeitskammern weisen eine Druckmittelzufuhr auf, über die die Arbeitskammern druckmittelbeaufschlagt werden können, so dass der Rotor eine rotatorische Verstellbewegung gegenüber dem Stator ausführt.A embodiment the camshaft adjusting devices is that the rotor a rotary-winged piston having a cavity in the stator in different working chambers divided. The working chambers have a pressure medium supply, over the the working chambers can be pressurized, so that the rotor has a rotary adjustment movement relative to the Stator executes.
Nachteilig bei dieser Ausführungsform ist der verhältnismäßig aufwendig gestaltete Drehkolben, die hohen Leckageverluste, die erhöhten Reibmomente zwischen Rotor und Stator, der erhöhte Bauraumbedarf und schließlich eine aufwendigen Zusammenbaumontage mit den damit verbundenen hohen Kosten.adversely in this embodiment is the relatively expensive designed rotary lobe, the high leakage losses, the increased friction moments between rotor and stator, the increased space requirement and finally a complex assembly with the associated high costs.
Alternativ kann der Rotor auch einen Axialkolbenantrieb aufweisen, dessen Verstellbewegung über eine aufwendig herzustellende Schrägverzahnung in eine Rotationsbewegung des Rotors gegenüber dem Stator umgewandelt wird.alternative the rotor can also have an axial piston drive whose adjusting movement via a complicated to produce helical teeth converted into a rotational movement of the rotor relative to the stator becomes.
Nachteilig bei dieser Versteileinrichtung sind ebenfalls die hohe Anzahl von Einzelteilen und die damit verbundenen hohen Montagekosten.adversely in this adjusting device are also the high number of Parts and the associated high installation costs.
Aufgabe der Erfindung ist es, eine Nockenwellenverstelleinrichtung zu schaffen, die einen möglichst einfachen Aufbau mit möglichst wenigen Einzelteilen aufweisen soll.task the invention is to provide a camshaft adjusting device, the one possible simple construction with as possible should have a few items.
Zur Lösung der Aufgabe wird eine Nockenwellenverstelleinrichtung mit den Merkmalen des Anspruchs 1 vorgeschlagen, wobei vorteilhafte Weiterbildungen den Unteransprüchen zu entnehmen sind.to solution The object is a camshaft adjusting device with the features of claim 1, wherein advantageous developments the dependent claims can be seen.
Erfindungsgemäß wird zur Lösung der Aufgabe eine Nockenwellenverstelleinrichtung für eine Brennkraftmaschine eines Kraftfahrzeuges mit folgenden Bauteilen vorgeschlagen:
- – einem über eine Kurbelwelle der Brennkraftmaschine antreibbaren Stator,
- – einem mit der Nockenwelle drehfest verbundenen Rotor,
- – einem in Radialrichtung verschiebbaren Kolben mit dem die Drehwinkelstellung des Rotors gegenüber dem Stator veränderbar ist,
- – wobei der Kolben in einem Hohlraum des Stators angeordnet ist und den Hohlraum des Stators in wenigstens zwei erste Arbeitskammern unterteilt,
- – und der Kolben einen Hohlraum aufweist, in dem der Rotor angeordnet ist, und der Rotor den Hohlraum des Kolbens in zwei zweite Arbeitskammern unterteilt,
- – wobei wenigstens eine der ersten Arbeitskammern und eine der zweiten Arbeitskammern durch eine in Verschieberichtung des Kolbens angeordnete dem Kolben und/oder dem Stator zugeordnete Nut gebildete Druckmittelverbindung verbunden sind.
- A stator which can be driven via a crankshaft of the internal combustion engine,
- A rotor rotatably connected to the camshaft,
- A radially displaceable piston with which the angular position of the rotor relative to the stator is variable,
- Wherein the piston is arranged in a cavity of the stator and divides the cavity of the stator into at least two first working chambers,
- - And the piston has a cavity in which the rotor is arranged, and the rotor divides the cavity of the piston into two second working chambers,
- - Wherein at least one of the first working chambers and one of the second working chambers are connected by a arranged in the direction of displacement of the piston associated with the piston and / or the stator groove pressure medium connection.
Ein besonders einfacher Aufbau der erfindungsgemäßen Nockenwellenverstelleinrichtung ergibt sich dadurch, dass die Verschiebebewegung des Kolbens mit einem exzentrisch an dem Rotor eingreifenden Eingriffsmittel in eine rotatorische Verstellbewegung des Rotors umformbar ist.One particularly simple construction of the camshaft adjusting device according to the invention results from the fact that the sliding movement of the piston with an engaging eccentrically on the rotor engaging means in a rotary adjustment movement of the rotor is deformable.
Das exzentrische Eingriffsmittel kann durch eine bogenförmige Verzahnung gebildet sein, in welcher der Kolben mit einer linearen Verzahnung kämmt.The eccentric engaging means may be provided by an arcuate toothing be formed, in which the piston meshes with a linear toothing.
Eine einfache Art der Führung des Kolbens besteht darin, dass der Kolben zwei gegenüberliegende parallel zueinander angeordnete Führungsflächen aufweist. Durch die Führungsflächen erfolgt sowohl die Führung des Kolbens während der Ausführung der Verstellbewegung als auch die Kraftübertragung von dem Stator auf den Kolben, und schließlich auf den Rotor.A simple style of leadership of the piston is that the piston is two opposite Has parallel to each other guide surfaces. Through the guide surfaces takes place both the leadership of the piston during the execution the adjustment movement as well as the power transmission from the stator the piston, and finally up the rotor.
Eine besonders einfache Art der Verwirklichung der Druckmittelverbindung besteht darin, dass diese einer der Führungsflächen zugeordnet ist. Die Nut kann dadurch kostengünstig durch entsprechende Oberflächenbearbeitung des Kolbens oder des Stator in diese eingebracht werden. Hier wird der Vorteil genutzt, dass die Führungsfläche aufgrund ihrer Funktion erhöhten Genauigkeitsanforderungen unterliegt und daher einer besonderen Oberflächenbearbeitung unterzogen werden muss. Die Druckmittelverbindung kann dann kostengünstig in diesem Arbeitsgang mit eingearbeitet werden.A particularly simple way of realizing the pressure medium connection is that this is assigned to one of the guide surfaces. The groove This can be cost effective by appropriate surface treatment the piston or the stator are introduced into this. Here is used the advantage that the guide surface due increased their function Accuracy requirements and therefore a special one surface treatment must be subjected. The pressure medium connection can then be inexpensively be integrated with this operation.
Eine weitere bevorzugte Weiterbildung der Erfindung besteht darin, dass wenigstens zwei Kolben vorgesehen sind, deren Verschieberichtung in einem Winkel zueinander stehen. Hierdurch können mehrere Kolben vorgesehen wer den, die an unterschiedlichen Stellen an dem Rotor angreifen. Bei einer Fehlfunktion eines Kolbens ist die Funktionsfähigkeit dann immer noch durch den jeweils anderen Kolben gesichert.Another preferred embodiment of Invention is that at least two pistons are provided, whose displacement direction are at an angle to each other. As a result, a plurality of pistons can be provided to those who attack at different locations on the rotor. In case of malfunction of a piston, the functionality is then still secured by the other piston.
Es wird weiter vorgeschlagen, dass bei der Verwendung mehrerer Kolben diese punktsymmetrisch zu der Rotationsachse des Rotors angeordnet sind. Damit wird eine Möglichkeit des Massenausgleichs zur Vermeidung von Unwuchtproblemen geschaffen.It it is further suggested that when using multiple pistons these are arranged point-symmetrically to the axis of rotation of the rotor. This will be a possibility mass balance to avoid imbalance problems created.
Der Winkel zwischen den Kolben kann vorzugsweise 180 Grad betragen, so dass die Verschiebebewegung der Kolben gegensinnig ist. Beide Kolben sind dann zweckmäßigerweise identisch aufgebaut und an den Rotor angebunden, so dass möglichst viele Gleichteile verwendet werden.Of the Angle between the pistons may preferably be 180 degrees, so that the sliding movement of the piston is in opposite directions. Both Pistons are then expediently identically constructed and connected to the rotor, so that possible many identical parts are used.
Es wird weiter vorgeschlagen, dass an dem Stator die Kolben voneinander trennende Stege vorgesehen sind. Die Stege können dabei mehrere Funktionen aufweisen, wie z. B. Trennung der Arbeitskammern, Lagerung des Rotors, Führung der Kolben, Versteifung des Stators etc.It It is further proposed that on the stator, the pistons from each other separating webs are provided. The webs can do several functions have, such. B. separation of the working chambers, storage of the rotor, guide the piston, stiffening of the stator etc.
Ferner wird vorgeschlagen, dass der Kolben eine axiale oder radiale in den Stator eingreifende Feststelleinrichtung aufweist, wodurch der Kolben, und damit mittelbar der Rotor, in einer vorbestimmten Sollposition gegenüber dem Stator festlegbar ist.Further It is suggested that the piston has an axial or radial in Having the stator engaging locking device, whereby the Piston, and thus indirectly the rotor, in a predetermined desired position across from The stator is fixed.
Alternativ kann auch der Rotor eine axiale oder radiale in den Stator eingreifende Feststelleinrichtung aufweisen, wodurch dieser gegenüber dem Stator direkt in der Sollposition festlegbar ist.alternative The rotor may also have an axial or radial engagement with the stator Have locking device, whereby this relative to the stator can be fixed directly in the target position.
Nachfolgend wird die Erfindung anhand eines bevorzugten Ausführungsbeispieles näher erläutert. In den Figuren ist im Einzelnen zu erkennen:following The invention will be explained in more detail with reference to a preferred embodiment. In The figures show in detail:
In
In
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Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810022009 DE102008022009A1 (en) | 2008-05-02 | 2008-05-02 | Cam shaft adjusting device for internal-combustion engine of motor vehicle, has operating chambers connected by pressurizing medium connections that form groove assigned to piston and/or stator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810022009 DE102008022009A1 (en) | 2008-05-02 | 2008-05-02 | Cam shaft adjusting device for internal-combustion engine of motor vehicle, has operating chambers connected by pressurizing medium connections that form groove assigned to piston and/or stator |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008022009A1 true DE102008022009A1 (en) | 2009-11-05 |
Family
ID=41130988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200810022009 Withdrawn DE102008022009A1 (en) | 2008-05-02 | 2008-05-02 | Cam shaft adjusting device for internal-combustion engine of motor vehicle, has operating chambers connected by pressurizing medium connections that form groove assigned to piston and/or stator |
Country Status (1)
Country | Link |
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DE (1) | DE102008022009A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008056667A1 (en) | 2008-11-11 | 2010-05-12 | Schaeffler Kg | Device for variable adjustment of control times of charge-cycle valve in e.g. belt drive of internal combustion engine, has adjusting units i.e. disks, changing distance between separating, drive and output elements supporting tooth systems |
DE102008056666A1 (en) | 2008-11-11 | 2010-05-12 | Schaeffler Kg | Camshaft adjusting device for use in e.g. belt drive of internal combustion engine, has tooth system formed at tooth system carrier displaced in direction of another tooth system and subjected with force in direction of latter tooth system |
DE102008056668A1 (en) | 2008-11-11 | 2010-05-12 | Schaeffler Kg | Device for variable adjustment of valve timing of gas exchange valve of internal combustion engine, has drive element, output element and separative element |
-
2008
- 2008-05-02 DE DE200810022009 patent/DE102008022009A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008056667A1 (en) | 2008-11-11 | 2010-05-12 | Schaeffler Kg | Device for variable adjustment of control times of charge-cycle valve in e.g. belt drive of internal combustion engine, has adjusting units i.e. disks, changing distance between separating, drive and output elements supporting tooth systems |
DE102008056666A1 (en) | 2008-11-11 | 2010-05-12 | Schaeffler Kg | Camshaft adjusting device for use in e.g. belt drive of internal combustion engine, has tooth system formed at tooth system carrier displaced in direction of another tooth system and subjected with force in direction of latter tooth system |
DE102008056668A1 (en) | 2008-11-11 | 2010-05-12 | Schaeffler Kg | Device for variable adjustment of valve timing of gas exchange valve of internal combustion engine, has drive element, output element and separative element |
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Legal Events
Date | Code | Title | Description |
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8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 H, DE |
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R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120823 Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120823 |
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R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140213 Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140213 |
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R012 | Request for examination validly filed | ||
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20150223 |
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R012 | Request for examination validly filed |
Effective date: 20150116 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |