EP3688288A1 - Kit having a camshaft phaser - Google Patents

Kit having a camshaft phaser

Info

Publication number
EP3688288A1
EP3688288A1 EP18783363.7A EP18783363A EP3688288A1 EP 3688288 A1 EP3688288 A1 EP 3688288A1 EP 18783363 A EP18783363 A EP 18783363A EP 3688288 A1 EP3688288 A1 EP 3688288A1
Authority
EP
European Patent Office
Prior art keywords
actuator
kit
central valve
pole
pole tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18783363.7A
Other languages
German (de)
French (fr)
Other versions
EP3688288B1 (en
Inventor
Stephan Wanner
Bernhard Schatz
André Selke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eco Holding 1 GmbH
Original Assignee
Eco Holding 1 GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eco Holding 1 GmbH filed Critical Eco Holding 1 GmbH
Publication of EP3688288A1 publication Critical patent/EP3688288A1/en
Application granted granted Critical
Publication of EP3688288B1 publication Critical patent/EP3688288B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—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
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control valves
    • 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
    • F01L2001/34426—Oil control valves
    • F01L2001/34433—Location oil control valves
    • 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
    • F01L2001/34479—Sealing of phaser devices
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the invention relates to a kit with a camshaft adjuster, in which a pressure fluid distributing central valve is provided, and with a central valve controlling actuator, wherein the camshaft adjuster by means of a dry-running traction drive, such as a belt driven or driven and a rotatable in one Stator mounted rotor has.
  • a dry-running traction drive such as a belt driven or driven and a rotatable in one Stator mounted rotor has.
  • Kits consisting of a camshaft adjuster and a central valve are known for example from DE 10 2015 214 725 A1. If the camshaft adjuster is driven by means of a belt, the sealing of the camshaft adjuster and the components operatively connected with it must be ensured.
  • the object of the present invention is to provide an improved compared to the prior art kit, which ensures the seal and at the same time is easy and inexpensive to produce.
  • kits with a camshaft adjuster in which a pressure fluid distributing central valve is provided.
  • the kit has a Central valve controlling actuator, wherein the camshaft adjuster is driven or driven by means of a dry-running traction drive and has a rotatably mounted in a stator rotor. Between the camshaft adjuster and the actuator is filled via the central valve with pressurized fluid
  • the actuator comprises at least one armature movable by means of a coil, a pole core and a pole tube as a pole tube assembly.
  • Sealing by means of a separate sealing element can advantageously be omitted.
  • the sealing concept according to the invention is conceivable in embodiments in which the actuator is not connected to the central valve itself but with a camshaft end or a component arranged on the camshaft end in a rotationally fixed and sealed manner.
  • the armature of the actuator can be axially displaceable in a sleeve, wherein the sleeve is materially connected, in particular by means of welding or gluing to the central valve.
  • the sleeve allows magnetic separation of armature and pole tube assembly.
  • the anchor can be inexpensively turned from free-cutting steel.
  • the sleeve is provided as a chipless thin manufactured sleeve and has a coating produced by plasma nitriding.
  • Wear resistant sliding coating makes it possible to make the sleeve thin, without the risk that the sleeve wears over a very long life or loses in wall thickness.
  • the pole tube and / or the pole core on an inner side a plurality of axial, preferably molded from plastic Plastic centering ribs.
  • the centering ribs allow a simple and effective centering of the outer actuator components.
  • the coil and the remaining outer Aktuatorbaumaschine be radially centered on the technical unit pole tube assembly / central valve and axially positioned and positioned radially in a motor-fixed component.
  • a particularly easy to manufacture and inexpensive embodiment of the invention provides that the pole core of the actuator non-positively and positively, in particular by means of a press fit with the central valve is connected.
  • the pole core with the pole tube can preferably form a preassemblable pole tube assembly, wherein a non-magnetizable, produced by a thermal process intermediate ring is provided between the pole tube and the pole core, which connects pole tube and pole core cohesively.
  • the pole core with the pole tube can form a pole tube assembly, in which the pole tube and the pole core are provided in one piece.
  • a bobbin of the coil on an inner side of a plurality of axial, preferably molded plastic plastic centering ribs.
  • the centering ribs allow easy centering and are cost-effective to the bobbin formable.
  • At least the coil with a bobbin and a housing of the actuator are radially centered on the pole tube assembly by means of one or more slide bearings.
  • the sliding bearing or bearings allow a minimization of the gap between pole tube assembly and pole discs. Does that know or the slide bearing as an additional material PFTE, a particularly low-wear storage can be achieved even for high peripheral speeds.
  • An advantageous embodiment provides that a single sliding bearing is arranged from a non-ferrous base material between the bobbin and the pole tube assembly. This can be encapsulated, for example, with the remaining outer actuator components.
  • the arrangements in the region of the bobbin allow a simple minimization of the gap between pole tube assembly and pole plates without additional space.
  • two sliding bearings are arranged from a base material containing iron axially outside of a magnetic circuit.
  • a sealing element can be provided for further sealing between the camshaft adjuster, in particular between the stator and the central valve.
  • a bearing element can be provided between the camshaft adjuster, in particular between the stator and the central valve.
  • Feature combinations can be used not only in the specified combination, but also in other combinations or in isolation, without departing from the scope of the invention. Shown in the drawing: a schematic representation of a section of a first embodiment of a kit according to the invention in longitudinal section; a schematic representation of a detail of a second embodiment of a kit according to the invention in longitudinal section; a central valve / actuator assembly of the kit of Figure 2 in longitudinal section. a cross section AA of the central valve / actuator assembly of the kit of FIG. 2; an enlarged section X of the cross section AA of FIG. 4; a section of a third embodiment of a kit according to the invention in longitudinal section and
  • Figure 7 shows a detail of a fourth embodiment of a kit according to the invention in longitudinal section.
  • Fig. 1 shows a first embodiment of a kit 1 with a basically known camshaft adjuster 2, in which a pressure fluid distributing central valve 3 is provided.
  • the camshaft adjuster 2 is designed to adjust a camshaft (not shown in FIG. 1).
  • the central valve 3 has a, in a valve housing 1 1 axially movable piston 10, which by means of an electromagnetic actuator 4 is moved.
  • an electromagnetic actuator 4 For hydraulic supply of the camshaft adjuster 2 several working connections in the valve housing 1 1 are provided.
  • FIG. 1 shows a further embodiment of the kit 1.
  • the camshaft adjuster 2 allows during operation of a cylinder head comprehensive, not shown internal combustion engine to bring about a change of opening and closing times of gas exchange valves of the internal combustion engine.
  • the opening and closing times of the gas exchange valves are shifted so that the internal combustion engine can perform its optimum performance at the respective speed.
  • the camshaft adjuster 2 is driven or drivable by means of a dry-running flexible drive, such as a belt, and has for this purpose a stator 5 rotatably connected to a pulley 12 as a drive wheel.
  • the pulley 12 is guided over the belt as a drive element.
  • the stator 5 in a known manner with the crankshaft
  • stator 5 and the pulley 12 may be separate
  • the pulley 12 may for example form a cylindrical stator base and a lid.
  • Each work connection is assigned a pressure chamber. So that's the first one
  • Pressure chambers are relieved to a tank down.
  • a first working connection is pressurized by the central valve and a second working connection is relieved.
  • the second working port is pressurized by the central valve and the first working port is relieved.
  • the discharge takes place via at least one tank connection, whereby over this
  • Tank connection can drain the hydraulic fluid.
  • the piston 10 of the central valve 3 is moved by means of a plunger 15 of the actuator 4, which is fixed in an anchor 1 6 and axially displaceable with the armature 1 6 along a longitudinal axis of the actuator 4.
  • the actuator 4 comprises a pole tube assembly 17, not shown in FIG. 1, which is arranged within a cylinder-shaped, magnetic field generating coil 18, and a housing 19 which is fixed directly or with the aid of an adapter in a motor-fixed component 20 such as a cylinder head , Together with pole disks 31, 32 form the coil 18 and the pole tube assembly 17 a
  • pole disks 31, 32 may be formed integrally with the housing 19. Likewise, it is conceivable to overmold the housing 19 and the pole disks 31, 32 and the coil 18 with an additional plastic housing.
  • the coil 18 is received in a bobbin 21 made of plastic, which at least partially comprises the pole tube assembly.
  • the armature 1 6 is provided axially displaceable in a sleeve 22.
  • the sleeve 22 is for magnetic separation of armature 16 and pole tube assembly 17 preferably as a chipless thin manufactured sleeve
  • the anchor 1 6 can be inexpensively rotated from free cutting steel.
  • the very wear-resistant sliding coating makes it possible to make the sleeve 22 thin, without the risk that the sleeve 22 over a very long time
  • a pressurized fluid distribution chamber 7 which can be filled with pressurized fluid via the central valve 3 and which communicates with an armature chamber 8 of the actuator 4.
  • the Druckfluidverteilraum 7 is provided within the valve housing 1 1 and extends between the piston 10 and the armature chamber 8. The Druckfluidverteilraum 7 is sealed to the environment to keep the belt drive area free of hydraulic fluid / pressurized fluid and thus to ensure reliable operation of the drive ,
  • the first exemplary embodiment provides for the sealing of the pressurized fluid distribution chamber 7 by a cohesive connection of the actuator 4 or one or more actuator components to the central valve 3 or a central valve component.
  • the cohesively connected to the valve housing 1 1 sleeve 22 is rotatably supported by the connection in the pole tube assembly 17, not shown, which may be formed integrally or in several parts and which like the remaining outer components of the actuator 4 is statically attached to the motor-fixed component 20.
  • the sleeve 22 in the pole tube assembly can be injection molded on an inner side of the pole tube assembly several, preferably three, evenly distributed over the circumference, axial centering ribs made of plastic.
  • a part of the pole tube assembly 17, in particular a pole core can be materially connected, in particular by means of welding or gluing with the end face 24 of the central valve 3.
  • a sealing element 25 may be provided between the stator 5 and the central valve 3.
  • a storage by means of a suitable bearing 26 between the stator 5 and the central valve 3 may be provided.
  • FIGS. 2 to 5 differs from the first embodiment shown in FIG. 1 in that the actuator 4 has no sleeve and the armature 1 6 is slidably mounted in the Polrohrbauxx 17 in this case.
  • the pole tube assembly 17 comprises in this embodiment, the pole core 27, a pole tube 28 and a tightly connected to the pole tube 28 bottom 29. An additional cohesive connection of the pole core 27 with the valve housing 1 1 is conceivable.
  • a non-magnetizable, produced by a thermal process intermediate ring 30 may be provided between the pole tube 28 and the pole core 27, which pole tube 28 and pole core 27 connects cohesively.
  • valve housing 1 1 pole tube assembly 17 The positive and non-positively connected to the valve housing 1 1 pole tube assembly 17 is rotatable by the connection in the coil 18, i. stored in the bobbin 21, which, like the housing 19 and the pole plates 31, 32 are fixed statically to the motor-fixed component 20.
  • axial centering ribs 36 molded from plastic. These allow exact alignment and centering during assembly of the remaining actuator components (coil 18, bobbin 21, housing 19) and ensure compliance with a necessary small air gap. Separate sealing elements and a process-intensive production of sealing surfaces between the actuator 4 and the camshaft adjuster 2 can thus be dispensed with.
  • the housing 19 of the actuator 4 which may be encapsulated by means of an additional plastic housing as already described, is also fastened in this exemplary embodiment directly or with the aid of an adapter in a motor-fixed component 20 such as a cylinder head.
  • Fig. 6 shows a section of a third embodiment of a kit 1 according to the invention, in which, similar to the previous embodiment, the pole core 27 of the pole tube assembly 17 is rotatably connected to the central valve 3, not shown.
  • the pole tube assembly 17 is here formed in one piece and forms with the central valve 3 a technical unit.
  • the remaining outer components of the magnetic circuit coil 18, bobbin 21, housing 19 and pole disks 31, 32 are statically fixed directly or with the aid of an adapter in the engine-fixed component 20 such as a cylinder head.
  • the coil 18 with its bobbin 21, the pole discs 31, 32 and the housing 19 of the actuator 4 are radially centered by means of a sliding bearing 33 on the pole tube assembly 17 and fixed axially with minimal play.
  • the sliding bearing 33 in this embodiment is made of a non-ferrous base material (e.g., bronze) with PTFE and preferably can be overmolded with the remaining components.
  • two sliding bearings 34, 35 are arranged axially outside of the magnetic circuit, made of a base material containing iron. That is, the two plain bearings 34, 35 are each axially then the pole plates 31, 32 outside of the magnetic circuit.
  • the sealing concept of the invention is also conceivable in embodiments not shown, in which the sleeve 22 and the pole core 27 is not rotatably attached to the central valve 3 itself, but at a camshaft end or arranged on the camshaft end component as described.

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

Abstract

The invention relates to a kit (1), comprising a camshaft phaser (2), in which a central valve (3) is provided, which distributes a pressure fluid, and comprising an actuator (4), which controls the central valve (3). The camshaft phaser (2) is or can be driven by means of a dry-running traction mechanism drive and has a rotor (6) rotatably mounted in a stator (5). A pressure fluid distribution chamber (7) is provided between the camshaft phaser (2) and the actuator (4), which pressure fluid distribution chamber can be filled with pressure fluid via the central valve (3) and is connected to an armature chamber (8) of the actuator (4) and is sealed off from the environment. The actuator (4) comprises at least one armature (16) movable by means of a coil (18), one pole core (27) and one pole tube (28) as a pole tube assembly (17). According to the invention, the pressure fluid distribution chamber (7) is sealed by means of an integral bond and/or frictional and interlocking connection of the actuator or of one or more actuator components to the central valve.

Description

Bausatz mit einem Nockenwellenversteller  Kit with a camshaft adjuster
Die Erfindung betrifft einen Bausatz mit einem Nockenwellenversteller, in dem ein ein Druckfluid verteilendes Zentralventil vorgesehen ist, und mit einem das Zentralventil steuernden Aktuator, wobei der Nockenwellenversteller mittels eines trocken laufenden Zugmitteltriebes, etwa mit einem Riemen, angetrieben oder antreibbar ist und einen drehbar in einem Stator gelagerten Rotor aufweist. The invention relates to a kit with a camshaft adjuster, in which a pressure fluid distributing central valve is provided, and with a central valve controlling actuator, wherein the camshaft adjuster by means of a dry-running traction drive, such as a belt driven or driven and a rotatable in one Stator mounted rotor has.
Bausätze bestehend aus einem Nockenwellenversteller und einem Zentralventil sind beispielsweise aus der DE 10 2015 214 725 A1 bekannt. Ist der Nockenwellenversteller mittels eines Riemen angetrieben, ist die Abdichtung des Nockenwellenverstellers und den damit wirkverbundenen Bauteilen sicherzustellen. Kits consisting of a camshaft adjuster and a central valve are known for example from DE 10 2015 214 725 A1. If the camshaft adjuster is driven by means of a belt, the sealing of the camshaft adjuster and the components operatively connected with it must be ensured.
Die Aufgabe der vorliegenden Erfindung ist es, einen im Vergleich zum Stand der Technik verbesserten Bausatz bereitzustellen, welcher die Abdichtung gewährleistet und gleichzeitig einfach und kostengünstig herstellbar ist. The object of the present invention is to provide an improved compared to the prior art kit, which ensures the seal and at the same time is easy and inexpensive to produce.
Die Aufgabe wird erfindungsgemäß durch einen Bausatz mit den Merkmalen das Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen und nichttrivialen Weiterbildungen der Erfindung sind in den jeweiligen Unteransprüchen angegeben. The object is achieved by a kit with the features of claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the respective subclaims.
Es wird ein Bausatz mit einem Nockenwellenversteller vorgeschlagen, in dem ein ein Druckfluid verteilendes Zentralventil vorgesehen ist. Weiter weist der Bausatz einen das Zentralventil steuernden Aktuator auf, wobei der Nockenwellenversteller mittels eines trocken laufenden Zugmitteltriebes angetrieben oder antreibbar ist und einen drehbar in einem Stator gelagerten Rotor aufweist. Zwischen dem Nockenwellenversteller und dem Aktuator ist ein über das Zentralventil mit Druckfluid befüllbarer It is proposed a kit with a camshaft adjuster, in which a pressure fluid distributing central valve is provided. Next, the kit has a Central valve controlling actuator, wherein the camshaft adjuster is driven or driven by means of a dry-running traction drive and has a rotatably mounted in a stator rotor. Between the camshaft adjuster and the actuator is filled via the central valve with pressurized fluid
Druckfluidverteilraum vorgesehen, der mit einem Ankerraum des Aktuators in Druckfluidverteilraum provided with an armature space of the actuator in
Verbindung steht und zur Umgebung hin abgedichtet ist. Der Aktuator umfasst wenigstens einen mittels einer Spule bewegbaren Anker, einen Polkern und ein Polrohr als Polrohrbaugruppe. Connection is sealed and sealed to the environment. The actuator comprises at least one armature movable by means of a coil, a pole core and a pole tube as a pole tube assembly.
Erfindungsgemäß erfolgt die Abdichtung des Druckfluidverteilraums durch eine stoffschlüssige und/oder kraft- und formschlüssige Verbindung des Aktuators bzw. According to the invention, the sealing of the Druckfluidverteilraums by a cohesive and / or non-positive and positive connection of the actuator or
eines oder mehrerer Aktuatorbauteile mit dem Zentralventil. Eine aufwendige one or more Aktuatorbauteile with the central valve. An elaborate
Abdichtung mittels eines separaten Dichtelement kann vorteilhafterweise entfallen. Sealing by means of a separate sealing element can advantageously be omitted.
Grundsätzlich ist das erfindungsgemäße Abdichtungskonzept bei Ausführungen denkbar, bei welchen der Aktuator nicht an dem Zentralventil selbst, sondern mit einem Nockenwellenende oder einem an dem Nockenwellenende angeordneten Bauteil drehfest und abgedichtet verbunden wird. In principle, the sealing concept according to the invention is conceivable in embodiments in which the actuator is not connected to the central valve itself but with a camshaft end or a component arranged on the camshaft end in a rotationally fixed and sealed manner.
Gemäß einer vorteilhaften Ausführung der Erfindung kann der Anker des Aktuators in einer Hülse axialverschieblich sein, wobei die Hülse stoffschlüssig, insbesondere mittels Schweißen oder Kleben mit dem Zentralventil verbunden ist. Die Hülse erlaubt eine magnetische Trennung von Anker und Polrohrbaugruppe. Der Anker kann kostengünstig aus Automatenstahl gedreht sein. According to an advantageous embodiment of the invention, the armature of the actuator can be axially displaceable in a sleeve, wherein the sleeve is materially connected, in particular by means of welding or gluing to the central valve. The sleeve allows magnetic separation of armature and pole tube assembly. The anchor can be inexpensively turned from free-cutting steel.
Vorzugsweise ist die Hülse als spanlos dünn gefertigte Hülse vorgesehen und weist eine mittels Plasmanitrieren hergestellte Beschichtung auf. Die sehr Preferably, the sleeve is provided as a chipless thin manufactured sleeve and has a coating produced by plasma nitriding. The very
verschleißbeständige Gleitbeschichtung ermöglicht es, die Hülse dünn zu fertigen, ohne dass die Gefahr besteht, dass die Hülse über eine sehr lange Lebensdauer verschleißt bzw. an Wandstärke verliert. Wear resistant sliding coating makes it possible to make the sleeve thin, without the risk that the sleeve wears over a very long life or loses in wall thickness.
Gemäß einer weiteren vorteilhaften Ausführung weist das Polrohr und/oder der Polkern auf einer Innenseite mehrere axiale, vorzugsweise aus Kunststoff angespritzte Zentrierrippen aus Kunststoff auf. Die Zentrierrippen erlauben eine einfache und effektive Zentrierung der äußeren Aktuatorbauteile. According to a further advantageous embodiment, the pole tube and / or the pole core on an inner side a plurality of axial, preferably molded from plastic Plastic centering ribs. The centering ribs allow a simple and effective centering of the outer actuator components.
Eine alternative Ausführungsform der Erfindung sieht vor, dass der Polkern desAn alternative embodiment of the invention provides that the pole core of
Aktuators stoffschlüssig, insbesondere mittels Schweißen oder Kleben mit demActuator cohesively, in particular by means of welding or gluing with the
Zentralventil verbunden ist. Die Spule und die restlichen äußeren Aktuatorbauteile werden auf der technischen Einheit Polrohrbaugruppe/Zentralventil radial zentriert und axial positioniert sowie radial in einem motorfesten Bauteil positioniert. Central valve is connected. The coil and the remaining outer Aktuatorbauteile be radially centered on the technical unit pole tube assembly / central valve and axially positioned and positioned radially in a motor-fixed component.
Dies ermöglicht den einfachen Ausgleich von baugruppenspezifischen Toleranzen, wodurch der Aktuator lediglich den minimalen notwendigen Hub aufweisen muss. This allows the simple compensation of module-specific tolerances, whereby the actuator only has to have the minimum necessary stroke.
Dadurch kann zusätzlich eine Bauraumreduzierung erzielt werden. This can additionally be achieved a space reduction.
Ebenso ist es nicht notwendig, einen Spielausgleich für Koaxialfehler vorzusehen.  Likewise, it is not necessary to provide clearance compensation for coaxial errors.
Eine besonders einfach herstellbare und kostengünstige Ausgestaltung der Erfindung sieht vor, dass der Polkern des Aktuators kraft- und formschlüssig, insbesondere mittels einer Presspassung mit dem Zentralventil verbunden ist. A particularly easy to manufacture and inexpensive embodiment of the invention provides that the pole core of the actuator non-positively and positively, in particular by means of a press fit with the central valve is connected.
Dabei kann der Polkern mit dem Polrohr vorzugsweise eine vormontierbare Polrohrbaugruppe bilden, wobei zwischen dem Polrohr und dem Polkern ein nicht- magnetisierbarer, mittels eines thermischen Verfahrens hergestellter Zwischenring vorgesehen ist, welcher Polrohr und Polkern stoffschlüssig verbindet. Alternativ kann der Polkern mit dem Polrohr eine Polrohrbaugruppe bilden, bei welcher das Polrohr und der Polkern einteilig vorgesehen sind. In this case, the pole core with the pole tube can preferably form a preassemblable pole tube assembly, wherein a non-magnetizable, produced by a thermal process intermediate ring is provided between the pole tube and the pole core, which connects pole tube and pole core cohesively. Alternatively, the pole core with the pole tube can form a pole tube assembly, in which the pole tube and the pole core are provided in one piece.
Gemäß einer vorteilhaften Ausführung der Erfindung weist ein Spulenkörper der Spule auf einer Innenseite mehrere axiale, vorzugsweise aus Kunststoff angespritzte Zentrierrippen aus Kunststoff auf. Die Zentrierrippen erlauben eine einfache Zentrierung und sind kostengünstig an den Spulenkörper anformbar. According to an advantageous embodiment of the invention, a bobbin of the coil on an inner side of a plurality of axial, preferably molded plastic plastic centering ribs. The centering ribs allow easy centering and are cost-effective to the bobbin formable.
Gemäß einer anderen vorteilhaften Ausführung der Erfindung sind wenigstens die Spule mit einem Spulenkörper sowie ein Gehäuse des Aktuators mittels eines oder mehrerer Gleitlager auf der Polrohrbaugruppe radial zentriert. Das oder die Gleitlager erlauben eine Minimierung der Spalte zwischen Polrohrbaugruppe und Polscheiben. Weist das bzw. die Gleitlager als zusätzlichen Werkstoff PFTE auf, kann eine besonders verschleißarme Lagerung auch für hohe Umfangsgeschwindigkeiten erzielt werden. According to another advantageous embodiment of the invention, at least the coil with a bobbin and a housing of the actuator are radially centered on the pole tube assembly by means of one or more slide bearings. The sliding bearing or bearings allow a minimization of the gap between pole tube assembly and pole discs. Does that know or the slide bearing as an additional material PFTE, a particularly low-wear storage can be achieved even for high peripheral speeds.
Eine vorteilhafte Ausführung sieht vor, dass ein einziges Gleitlager aus einem nicht eisenhaltigen Grundwerkstoff zwischen dem Spulenkörper und der Polrohrbaugruppe angeordnet ist. Dieses kann beispielsweise mit den restlichen äußeren Aktuatorbauteilen umspritzt werden. Die Anordnungen im Bereich des Spulenkörpers erlaubt eine einfache Minimierung der Spalte zwischen Polrohrbaugruppe und Polscheiben ohne zusätzlichen Bauraum. An advantageous embodiment provides that a single sliding bearing is arranged from a non-ferrous base material between the bobbin and the pole tube assembly. This can be encapsulated, for example, with the remaining outer actuator components. The arrangements in the region of the bobbin allow a simple minimization of the gap between pole tube assembly and pole plates without additional space.
Gemäß einer alternativen vorteilhaften Ausführung sind zwei Gleitlager aus einem eisenhaltigen Grundwerkstoff axial außerhalb eines Magnetkreises angeordnet. According to an alternative advantageous embodiment, two sliding bearings are arranged from a base material containing iron axially outside of a magnetic circuit.
Vorzugsweise kann zur weiteren Abdichtung zwischen dem Nockenwellenversteller, insbesondere zwischen dem Stator und dem Zentralventil ein Dichtungselement vorgesehen sein. Preferably, a sealing element can be provided for further sealing between the camshaft adjuster, in particular between the stator and the central valve.
Gemäß einer vorteilhaften Ausführung kann zwischen dem Nockenwellenversteller, insbesondere zwischen dem Stator und dem Zentralventil ein Lagerungselement vorgesehen sein. According to an advantageous embodiment, a bearing element can be provided between the camshaft adjuster, in particular between the stator and the central valve.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung von bevorzugten Ausführungsbeispielen sowie Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and
anhand der Zeichnung. Die vorstehend in der Beschreibung genannten Merkmale und Merkmalskombinationen sowie die nachfolgend in der Figurenbeschreibung genannten und/oder in den Figuren alleine gezeigten Merkmale und based on the drawing. The features and feature combinations mentioned above in the description as well as the features mentioned below in the description of the figures and / or in the figures alone, and
Merkmalskombinationen sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar, ohne den Rahmen der Erfindung zu verlassen. In der Zeichnung zeigen: in schematischer Darstellung einen Ausschnitt eines ersten Ausführungsbeispiels eines erfindungsgemäßen Bausatzes im Längsschnitt; in schematischer Darstellung einen Ausschnitt eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Bausatzes im Längsschnitt; eine Zentralventil/Aktuator-Baugruppe des Bausatzes gemäß Fig. 2 im Längsschnitt; einen Querschnitt A-A der Zentralventil/Aktuator-Baugruppe des Bausatzes gemäß Fig. 2; einen vergrößerten Ausschnitt X des Querschnitts A-A gemäß Fig. 4; einen Ausschnitt eines dritten Ausführungsbeispiels eines erfindungsgemäßen Bausatzes im Längsschnitt und Feature combinations can be used not only in the specified combination, but also in other combinations or in isolation, without departing from the scope of the invention. Shown in the drawing: a schematic representation of a section of a first embodiment of a kit according to the invention in longitudinal section; a schematic representation of a detail of a second embodiment of a kit according to the invention in longitudinal section; a central valve / actuator assembly of the kit of Figure 2 in longitudinal section. a cross section AA of the central valve / actuator assembly of the kit of FIG. 2; an enlarged section X of the cross section AA of FIG. 4; a section of a third embodiment of a kit according to the invention in longitudinal section and
Figur 7 einen Ausschnitt eines vierten Ausführungsbeispiels eines erfindungsgemäßen Bausatzes im Längsschnitt. Figure 7 shows a detail of a fourth embodiment of a kit according to the invention in longitudinal section.
Fig. 1 zeigt ein erstes Ausführungsbeispiel eines Bausatzes 1 mit einem grundsätzlich bekannten Nockenwellenversteller 2, in dem ein ein Druckfluid verteilendes Zentralventil 3 vorgesehen ist. Fig. 1 shows a first embodiment of a kit 1 with a basically known camshaft adjuster 2, in which a pressure fluid distributing central valve 3 is provided.
Der Nockenwellenversteller 2 ist zur Verstellung einer in Fig. 1 nicht dargestellten Nockenwelle ausgebildet. Das Zentralventil 3 weist einen, in einem Ventilgehäuse 1 1 axial bewegbaren Kolben 10 auf, welcher mit Hilfe eines elektromagnetischen Aktuators 4 bewegt wird. Zur hydraulischen Versorgung des Nockenwellenverstellers 2 sind mehrere Arbeitsanschlüsse im Ventilgehäuse 1 1 vorgesehen. The camshaft adjuster 2 is designed to adjust a camshaft (not shown in FIG. 1). The central valve 3 has a, in a valve housing 1 1 axially movable piston 10, which by means of an electromagnetic actuator 4 is moved. For hydraulic supply of the camshaft adjuster 2 several working connections in the valve housing 1 1 are provided.
Das Zentralventil 3 und der Aktuator 4 sind in Fig. 1 nur teilweise und schematisch ausgebildet. Details sind entsprechend Fig. 2 zu entnehmen, welche ein weiteres Ausführungsbeispiel des Bausatzes 1 zeigt. The central valve 3 and the actuator 4 are formed in Fig. 1 only partially and schematically. Details are shown in FIG. 2, which shows a further embodiment of the kit 1.
Der Nockenwellenversteller 2 erlaubt während des Betriebes eines einen Zylinderkopf umfassenden, nicht näher dargestellten Verbrennungsmotors eine Änderung von Öffnungs- und Schließzeiten von Gaswechselventilen des Verbrennungsmotors herbeizuführen. Hierzu wird mit Hilfe des Nockenwellenverstellers 2 eine relative Winkellage einer im Zylinderkopf drehbar aufgenommenen, nicht näher dargestellten Nockenwelle des Verbrennungsmotors gegenüber einer nicht näher dargestellten Kurbelwelle des Verbrennungsmotors stufenlos verändert, wobei die Nockenwelle relativ zur Kurbelwelle verdreht wird. Durch Verdrehen der Nockenwelle werden die Öffnungs- und Schließzeitpunkte der Gaswechselventile so verschoben, dass der Verbrennungsmotor bei der jeweiligen Drehzahl seine optimale Leistung erbringen kann. The camshaft adjuster 2 allows during operation of a cylinder head comprehensive, not shown internal combustion engine to bring about a change of opening and closing times of gas exchange valves of the internal combustion engine. For this purpose, with the aid of the camshaft adjuster 2, a relative angular position of a camshaft rotatably received in the cylinder head, not shown camshaft of the engine with respect to a crankshaft of the internal combustion engine, not shown, changed continuously, wherein the camshaft is rotated relative to the crankshaft. By turning the camshaft, the opening and closing times of the gas exchange valves are shifted so that the internal combustion engine can perform its optimum performance at the respective speed.
Der Nockenwellenversteller 2 ist mittels eines trocken laufenden Zugmitteltriebes, etwa mit einem Riemen, angetrieben oder antreibbar und weist hierzu einen mit einem Riemenrad 12 als Antriebsrad drehfest verbundenen Stator 5 auf. Das Riemenrad 12 ist dabei über den Riemen als Antriebselement geführt. Über den Riemen und das Riemenrad 12 ist der Stator 5 in bekannter Weise mit der Kurbelwelle  The camshaft adjuster 2 is driven or drivable by means of a dry-running flexible drive, such as a belt, and has for this purpose a stator 5 rotatably connected to a pulley 12 as a drive wheel. The pulley 12 is guided over the belt as a drive element. About the belt and the pulley 12, the stator 5 in a known manner with the crankshaft
antriebsverbunden. Der Stator 5 und das Riemenrad 12 können aus separaten drive-connected. The stator 5 and the pulley 12 may be separate
Bauteilen bestehen oder einstückig ausgebildet sein. Das Riemenrad 12 kann beispielsweise einen zylindrischen Statorgrundkörper und einen Deckel bilden. Consist of components or be integrally formed. The pulley 12 may for example form a cylindrical stator base and a lid.
An Innenseiten des Stators 5 bzw. des Statorgrundkörpers 13 sind sich radial nach innen erstreckende Stege in regelmäßigen Abständen ausgebildet, derart, dass zwischen jeweils zwei benachbarten Stegen ein Zwischenraum gebildet ist. In den Zwischenraum hineinragend ist ein Flügel 14 einer Rotornabe eines drehbar im Stator 5 gelagerten Rotors 6 des Nockenwellenverstellers 2 angeordnet. Der Anzahl der Zwischenräume entsprechend weist die Rotornabe eine Anzahl von Flügel 14 auf. Somit ist mit Hilfe der Flügel jeder Zwischenraum in zwei Druckkammern teilbar. In diese Teilräume wird ein Druckmedium, im Allgemeinen ein Hydraulikfluid, mit Hilfe des Zentralventils 3 gesteuert eingebracht. On the inner sides of the stator 5 and the stator base 13 are radially inwardly extending webs are formed at regular intervals, such that between each two adjacent webs, a gap is formed. In the intermediate space protruding a wing 14 of a rotor hub of a rotatably mounted in the stator 5 rotor 6 of the camshaft adjuster 2 is arranged. The number of spaces corresponding to the rotor hub on a number of wings 14. Thus, with the help of the wings each space can be divided into two pressure chambers. In These subspaces is a pressure medium, generally a hydraulic fluid, introduced controlled by means of the central valve 3.
Jedem Arbeitsanschluss ist eine Druckkammer zugeordnet. So ist dem ersten Each work connection is assigned a pressure chamber. So that's the first one
Arbeitsanschluss die erste Druckkammer und dem zweiten Arbeitsanschluss die zweite Druckkammer zugeordnet. Um die Winkellage zwischen der Nockenwelle und dem Antriebsrad und damit der Kurbelwelle zu verändern, wird der Rotor relativ zum Stator gedreht. Hierzu wird je nach gewünschter Drehrichtung Hydraulikfluid in die Druckkammern eingespeist, während die jeweils anderen Working connection, the first pressure chamber and the second working port associated with the second pressure chamber. In order to change the angular position between the camshaft and the drive wheel and thus the crankshaft, the rotor is rotated relative to the stator. For this purpose, depending on the desired direction of rotation hydraulic fluid is fed into the pressure chambers, while the other
Druckkammern zu einem Tank hin entlastet werden. Um den Rotor gegenüber dem Stator entgegen dem Uhrzeigersinn zu verschwenken, wird vom Zentralventil ein erster Arbeitsanschluss unter Druck gesetzt und ein zweiter Arbeitsanschluss entlastet. Um den Rotor hingegen im Uhrzeigersinn zu verschwenken, wird vom Zentralventil der zweite Arbeitsanschluss unter Druck gesetzt und der erste Arbeitsanschluss entlastet. Die Entlastung erfolgt über zumindest einen Tankanschluss, wobei über diesen Pressure chambers are relieved to a tank down. In order to pivot the rotor counterclockwise with respect to the stator, a first working connection is pressurized by the central valve and a second working connection is relieved. In contrast, in order to pivot the rotor in a clockwise direction, the second working port is pressurized by the central valve and the first working port is relieved. The discharge takes place via at least one tank connection, whereby over this
Tankanschluss das Hydraulikfluid abfließen kann. Tank connection can drain the hydraulic fluid.
Der Kolben 10 des Zentralventils 3 wird mit Hilfe eines Stößels 15 des Aktuators 4 bewegt, der in einem Anker 1 6 fixiert und mit dem Anker 1 6 entlang einer Längsachse des Aktuators 4 axial verschiebbar ist. The piston 10 of the central valve 3 is moved by means of a plunger 15 of the actuator 4, which is fixed in an anchor 1 6 and axially displaceable with the armature 1 6 along a longitudinal axis of the actuator 4.
Der Aktuator 4 umfasst eine in Fig. 1 nicht dargestellte Polrohrbaugruppe 17, die innerhalb einer zylinderförmig ausgebildeten, ein Magnetfeld erzeugenden Spule 18 angeordnet ist, sowie ein Gehäuse 19, welches direkt oder mit Hilfe eines Adapters in einem motorfesten Bauteil 20 wie einem Zylinderkopf befestigt ist. Zusammen mit Polscheiben 31 , 32 bilden die Spule 18 und der Polrohrbaugruppe 17 einen The actuator 4 comprises a pole tube assembly 17, not shown in FIG. 1, which is arranged within a cylinder-shaped, magnetic field generating coil 18, and a housing 19 which is fixed directly or with the aid of an adapter in a motor-fixed component 20 such as a cylinder head , Together with pole disks 31, 32 form the coil 18 and the pole tube assembly 17 a
Magnetkreis. Eine oder beide Polscheiben 31 , 32 können einteilig mit dem Gehäuse 19 ausgebildet sein. Ebenso ist es denkbar, das Gehäuse 19 und die Polscheiben 31 , 32 und die Spule 18 mit einem zusätzlichen Kunststoffgehäuse zu umspritzen. Magnetic circuit. One or both pole disks 31, 32 may be formed integrally with the housing 19. Likewise, it is conceivable to overmold the housing 19 and the pole disks 31, 32 and the coil 18 with an additional plastic housing.
Die Spule 18 ist in einem Spulenkörper 21 aus Kunststoff aufgenommen, welcher die Polrohrbaugruppe wenigstens teilweise umfasst. Im ersten, in Fig. 1 gezeigten Ausführungsbeispiel ist der Anker 1 6 in einer Hülse 22 axialverschieblich vorgesehen. Die Hülse 22 ist zur magnetischen Trennung von Anker 16 und Polrohrbaugruppe 17 vorzugsweise als spanlos dünn gefertigte Hülse The coil 18 is received in a bobbin 21 made of plastic, which at least partially comprises the pole tube assembly. In the first embodiment shown in Fig. 1, the armature 1 6 is provided axially displaceable in a sleeve 22. The sleeve 22 is for magnetic separation of armature 16 and pole tube assembly 17 preferably as a chipless thin manufactured sleeve
vorgesehen und weist beispielsweise eine mittels Plasmanitrieren hergestellte provided and has, for example, a manufactured by means of plasma nitriding
Beschichtung auf. Der Anker 1 6 kann kostengünstig aus Automatenstahl gedreht sein. Die sehr verschleißbeständige Gleitbeschichtung ermöglicht es, die Hülse 22 dünn zu fertigen, ohne dass die Gefahr besteht, dass die Hülse 22 über eine sehr lange Coating on. The anchor 1 6 can be inexpensively rotated from free cutting steel. The very wear-resistant sliding coating makes it possible to make the sleeve 22 thin, without the risk that the sleeve 22 over a very long time
Lebensdauer verschleißt bzw. an Wandstärke verliert. Wears life or loses wall thickness.
Zwischen dem Nockenwellenversteller 2 und dem Aktuator 4 ist ein über das Zentralventil 3 mit Druckfluid befüllbarer Druckfluidverteilraum 7 vorhanden, der mit einem Ankerraum 8 des Aktuators 4 in Verbindung steht. Wie ersichtlich ist der Druckfluidverteilraum 7 innerhalb des Ventilgehäuses 1 1 vorgesehen und erstreckt sich zwischen dem Kolben 10 und dem Ankerraum 8. Der Druckfluidverteilraum 7 ist zur Umgebung hin abgedichtet, um den Riemenantriebsbereich frei von Hydraulikfluid/Druckfluid zu halten und damit den Antrieb betriebssicher zu gewährleisten. Between the camshaft adjuster 2 and the actuator 4 there is provided a pressurized fluid distribution chamber 7 which can be filled with pressurized fluid via the central valve 3 and which communicates with an armature chamber 8 of the actuator 4. As can be seen, the Druckfluidverteilraum 7 is provided within the valve housing 1 1 and extends between the piston 10 and the armature chamber 8. The Druckfluidverteilraum 7 is sealed to the environment to keep the belt drive area free of hydraulic fluid / pressurized fluid and thus to ensure reliable operation of the drive ,
Das erste Ausführungsbeispiel sieht hierzu vor, die Abdichtung des Druckfluidverteilraums 7 durch eine stoffschlüssige Verbindung des Aktuators 4 bzw. eines oder mehrerer Aktuatorbauteile mit dem Zentralventil 3 bzw. eines Zentralventilbauteils herzustellen. For this purpose, the first exemplary embodiment provides for the sealing of the pressurized fluid distribution chamber 7 by a cohesive connection of the actuator 4 or one or more actuator components to the central valve 3 or a central valve component.
Wie aus Fig. 1 hervorgeht, ist zur stoffschlüssigen Verbindung des Aktuators 4 mit dem Zentralventil 3 ein umlaufender Bund 23 der Hülse 22 mit einer axialen Stirnfläche 24 des Ventilgehäuses 1 1 dicht verschweißt oder verklebt. Als Schweißverfahren kommt beispielsweise Laserschweißen in Frage. Die Hülse 22 ist damit drehfest mit dem Zentralventil 3 und damit mit der Nockenwelle 9 ausgebildet.  As is apparent from Fig. 1, the cohesive connection of the actuator 4 with the central valve 3, a circumferential collar 23 of the sleeve 22 with an axial end face 24 of the valve housing 1 1 is welded tight or glued. As a welding process, for example, laser welding comes into question. The sleeve 22 is thus rotationally fixed to the central valve 3 and thus formed with the camshaft 9.
Die stoffschlüssig mit dem Ventilgehäuse 1 1 verbundene Hülse 22 ist durch die Verbindung drehbar in der nicht dargestellten Polrohrbaugruppe 17 gelagert, welche einteilig oder mehrteilig ausgebildet sein kann und die wie die restlichen äußeren Bauteile des Aktuators 4 statisch an dem motorfesten Bauteil 20 befestigt ist. Zur Zentrierung der Hülse 22 in der Polrohrbaugruppe können auf einer Innenseite der Polrohrbaugruppe mehrere, vorzugsweise drei, über den Umfang gleichmäßig verteilte, axiale Zentrierrippen aus Kunststoff angespritzt sein. Diese ermöglichen eine exakte Ausrichtung und Zentrierung bei der Montage der restlichen Aktuatorbauteile (Spule 18, Polrohrbaugruppe 17, Gehäuse 19) und gewährleisten die Einhaltung eines notwendigen geringen Luftspalts. Separate Dichtungselemente und eine prozessintensive Herstellung von Dichtflächen zwischen dem Aktuator 4 und dem Nockenwellenversteller 2 können damit entfallen. The cohesively connected to the valve housing 1 1 sleeve 22 is rotatably supported by the connection in the pole tube assembly 17, not shown, which may be formed integrally or in several parts and which like the remaining outer components of the actuator 4 is statically attached to the motor-fixed component 20. For centering the sleeve 22 in the pole tube assembly can be injection molded on an inner side of the pole tube assembly several, preferably three, evenly distributed over the circumference, axial centering ribs made of plastic. These allow exact alignment and centering during assembly of the remaining actuator components (coil 18, pole tube assembly 17, housing 19) and ensure compliance with a necessary small air gap. Separate sealing elements and a process-intensive production of sealing surfaces between the actuator 4 and the camshaft adjuster 2 can thus be dispensed with.
Um die Robustheit des Bausatzes 1 zu steigern, kann zusätzlich ein Teil der Polrohrbaugruppe 17, insbesondere ein Polkern stoffschlüssig, insbesondere mittels Schweißen oder Kleben mit der Stirnfläche 24 des Zentralventils 3 verbunden sein. Zwischen dem Stator 5 und dem Zentralventil 3 kann zur weiteren Abdichtung ein Dichtungselement 25 vorgesehen sein. Ferner kann eine Lagerung mittels eines geeigneten Lagers 26 zwischen dem Stator 5 und dem Zentralventil 3 vorgesehen sein. To increase the robustness of the kit 1, in addition, a part of the pole tube assembly 17, in particular a pole core can be materially connected, in particular by means of welding or gluing with the end face 24 of the central valve 3. Between the stator 5 and the central valve 3, a sealing element 25 may be provided for further sealing. Furthermore, a storage by means of a suitable bearing 26 between the stator 5 and the central valve 3 may be provided.
Das gemäß den Fig. 2 bis 5 gezeigte Ausführungsbeispiel unterscheidet sich zum ersten Ausführungsbeispiel gemäß Fig. 1 darin, dass der Aktuator 4 keine Hülse aufweist und der Anker 1 6 in diesem Fall in der Polrohrbaugruppe 17 verschieblich gelagert ist. The embodiment shown in FIGS. 2 to 5 differs from the first embodiment shown in FIG. 1 in that the actuator 4 has no sleeve and the armature 1 6 is slidably mounted in the Polrohrbaugruppe 17 in this case.
Zwischen dem Nockenwellenversteller 2 und dem Aktuator 4 ist der über das Zentralventil 3 mit Druckfluid befüllbare Druckfluidverteilraum 7 vorhanden, der mit einem Ankerraum 8 des Aktuators 4 in Verbindung steht. Wie ersichtlich ist der Druckfluidverteilraum 7 innerhalb eines Polkerns 27 der Polrohrbaugruppe 17 vorgesehen und erstreckt sich zwischen dem Kolben 10 des Zentralventils 3 und dem Ankerraum 8. Der Druckfluidverteilraum 7 ist auch in diesem Ausführungsbeispiel zur Umgebung hin abgedichtet, um den Riemenantriebsbereich frei von Hydraulikfluid/Druckfluid zu halten und damit den Antrieb betriebssicher zu gewährleisten.  Between the camshaft adjuster 2 and the actuator 4 of the via the central valve 3 can be filled with pressurized fluid Druckfluidverteilraum 7 is present, which is in communication with an armature chamber 8 of the actuator 4. As can be seen, the Druckfluidverteilraum 7 is provided within a pole core 27 of the Polrohrbaugruppe 17 and extends between the piston 10 of the central valve 3 and the armature space 8. The Druckfluidverteilraum 7 is sealed in this embodiment to the environment to the belt drive area free of hydraulic fluid / pressurized fluid to keep and thus ensure the drive reliable.
Zur Abdichtung des Druckfluidverteilraums 7 ist der Polkern 27 des Aktuators 4 kraft- und formschlüssig, insbesondere mittels einer Presspassung mit dem Zentralventil 3, d.h. mit dem Ventilgehäuse 1 1 drehfest verbunden. Die Polrohrbaugruppe 17 umfasst in diesem Ausführungsbeispiel den Polkern 27, ein Polrohr 28 sowie einen mit dem Polrohr 28 dicht verbundenen Boden 29. Eine zusätzliche stoffschlüssige Verbindung des Polkerns 27 mit dem Ventilgehäuse 1 1 ist denkbar. For sealing the Druckfluidverteilraums 7 of the pole core 27 of the actuator 4 is positively and positively, in particular by means of a press fit with the central valve 3, that is rotatably connected to the valve housing 1 1. The pole tube assembly 17 comprises in this embodiment, the pole core 27, a pole tube 28 and a tightly connected to the pole tube 28 bottom 29. An additional cohesive connection of the pole core 27 with the valve housing 1 1 is conceivable.
Vorteilhafterweise kann zwischen dem Polrohr 28 und dem Polkern 27 ein nicht- magnetisierbarer, mittels eines thermischen Verfahrens hergestellter Zwischenring 30 vorgesehen sein, welcher Polrohr 28 und Polkern 27 stoffschlüssig verbindet. Advantageously, a non-magnetizable, produced by a thermal process intermediate ring 30 may be provided between the pole tube 28 and the pole core 27, which pole tube 28 and pole core 27 connects cohesively.
Die form- und kraftschlüssig mit dem Ventilgehäuse 1 1 verbundene Polrohrbaugruppe 17 ist durch die Verbindung drehbar in der der Spule 18, d.h. in dessen Spulenkörper 21 gelagert, welche wie das Gehäuse 19 und die Polscheiben 31 , 32 statisch an dem motorfesten Bauteil 20 befestigt sind. The positive and non-positively connected to the valve housing 1 1 pole tube assembly 17 is rotatable by the connection in the coil 18, i. stored in the bobbin 21, which, like the housing 19 and the pole plates 31, 32 are fixed statically to the motor-fixed component 20.
Zur Zentrierung des Spulenkörpers 21 der Spule 18 sind auf einer Innenseite des Spulenkörpers 21 mehrere, vorzugsweise drei, über den Umfang gleichmäßig verteilte, axiale Zentrierrippen 36 aus Kunststoff angespritzt sein. Diese ermöglichen eine exakte Ausrichtung und Zentrierung bei der Montage der restlichen Aktuatorbauteile (Spule 18, Spulenkörper 21 , Gehäuse 19) und gewährleisten die Einhaltung eines notwendigen geringen Luftspalts. Separate Dichtungselemente und eine prozessintensive Herstellung von Dichtflächen zwischen dem Aktuator 4 und dem Nockenwellenversteller 2 können damit entfallen. For centering of the bobbin 21 of the spool 18 are on an inside of the bobbin 21 several, preferably three, evenly distributed over the circumference, axial centering ribs 36 molded from plastic. These allow exact alignment and centering during assembly of the remaining actuator components (coil 18, bobbin 21, housing 19) and ensure compliance with a necessary small air gap. Separate sealing elements and a process-intensive production of sealing surfaces between the actuator 4 and the camshaft adjuster 2 can thus be dispensed with.
Das Gehäuse 19 des Aktuators 4, welches wie bereits beschrieben mittels eines zusätzlichen Kunststoffgehäuses umspritzt sein kann, ist bei diesem Ausführungsbeispiel ebenfalls direkt oder mit Hilfe eines Adapters in einem motorfesten Bauteil 20 wie einem Zylinderkopf befestigt. The housing 19 of the actuator 4, which may be encapsulated by means of an additional plastic housing as already described, is also fastened in this exemplary embodiment directly or with the aid of an adapter in a motor-fixed component 20 such as a cylinder head.
Fig. 6 zeigt einen Ausschnitt eines dritten Ausführungsbeispiels eines erfindungsgemäßen Bausatzes 1 , bei dem, ähnlich wie gemäß dem vorherigen Ausführungsbeispiel, der Polkern 27 der Polrohrbaugruppe 17 drehfest mit dem nicht dargestellten Zentralventil 3 verbunden ist. Die Polrohrbaugruppe 17 ist hier einteilig ausgebildet und bildet mit dem Zentralventil 3 eine technische Einheit. Die restlichen äußeren Bauteile des Magnetkreises (Spule 18, Spulenkörper 21 , Gehäuse 19 und Polscheiben 31 , 32 sind statisch direkt oder mit Hilfe eines Adapters in dem motorfesten Bauteil 20 wie einem Zylinderkopf befestigt. Fig. 6 shows a section of a third embodiment of a kit 1 according to the invention, in which, similar to the previous embodiment, the pole core 27 of the pole tube assembly 17 is rotatably connected to the central valve 3, not shown. The pole tube assembly 17 is here formed in one piece and forms with the central valve 3 a technical unit. The remaining outer components of the magnetic circuit (coil 18, bobbin 21, housing 19 and pole disks 31, 32 are statically fixed directly or with the aid of an adapter in the engine-fixed component 20 such as a cylinder head.
Die Spule 18 mit ihrem Spulenkörper 21 , die Polscheiben 31 , 32 sowie das Gehäuse 19 des Aktuators 4 sind mittels eines Gleitlagers 33 auf der Polrohrbaugruppe 17 radial zentriert und axial mit minimalem Spiel fixiert. Das Gleitlager 33 ist bei diesem Ausführungsbeispiel aus einem nicht eisenhaltigen Grundwerkstoff (z.B. Bronze) mit PTFE ausgebildet und kann vorzugsweise mit den restlichen Bauteilen umspritzt werden. The coil 18 with its bobbin 21, the pole discs 31, 32 and the housing 19 of the actuator 4 are radially centered by means of a sliding bearing 33 on the pole tube assembly 17 and fixed axially with minimal play. The sliding bearing 33 in this embodiment is made of a non-ferrous base material (e.g., bronze) with PTFE and preferably can be overmolded with the remaining components.
Bei einem vierten Ausführungsbeispiel gemäß Fig. 7 sind dagegen zwei Gleitlager 34, 35 aus einem eisenhaltigen Grundwerkstoff axial außerhalb des Magnetkreises angeordnet. Das heißt die beiden Gleitlager 34, 35 befinden sich jeweils axial anschließend der Polscheiben 31 , 32 außerhalb des Magnetkreises. In contrast, in a fourth exemplary embodiment according to FIG. 7, two sliding bearings 34, 35 are arranged axially outside of the magnetic circuit, made of a base material containing iron. That is, the two plain bearings 34, 35 are each axially then the pole plates 31, 32 outside of the magnetic circuit.
Grundsätzlich ist das erfindungsgemäße Abdichtungskonzept auch bei nicht gezeigten Ausführungen denkbar, bei welchen die Hülse 22 bzw. der Polkern 27 nicht an dem Zentralventil 3 selbst, sondern an einem Nockenwellenende oder einem an dem Nockenwellenende angeordneten Bauteil wie beschrieben drehfest befestigt wird. In principle, the sealing concept of the invention is also conceivable in embodiments not shown, in which the sleeve 22 and the pole core 27 is not rotatably attached to the central valve 3 itself, but at a camshaft end or arranged on the camshaft end component as described.

Claims

Ansprüche claims
1 . Bausatz (1 ) mit einem Nockenwellenversteller (2), in dem ein ein Druckfluid verteilendes Zentralventil (3) vorgesehen ist, und mit einem das Zentralventil (3) steuernden Aktuator (4), wobei der Nockenwellenversteller (2) mittels eines trocken laufenden Zugmitteltriebes angetrieben oder antreibbar ist und einen drehbar in einem Stator (5) gelagerten Rotor (6) aufweist, wobei zwischen dem Nockenwellenversteller (2) und dem Aktuator (4) ein über das Zentralventil (3) mit Druckfluid befüllbarer Druckfluidverteilraum (7) vorgesehen ist, der mit einem Ankerraum (8) des Aktuators (4) in Verbindung steht und zur Umgebung hin abgedichtet ist, und wobei der Aktuator (4) wenigstens einen mittels einer Spule (18) bewegbaren Anker (1 6), einen Polkern (27) und ein Polrohr (28) als Polrohrbaugruppe (17) umfasst, dadurch gekennzeichnet, dass die Abdichtung des Druckfluidverteilraums (7) durch eine stoffschlüssige und/oder kraft- und formschlüssige Verbindung des Aktuators bzw. eines oder mehrerer Aktuatorbauteile mit dem Zentralventil erfolgt. 1 . Kit (1) with a camshaft adjuster (2), in which a central valve (3) distributing a pressurized fluid is provided, and with an actuator (4) controlling the central valve (3), wherein the camshaft adjuster (2) is driven by means of a dry running traction drive or is drivable and has a rotatably mounted in a stator (5) rotor (6), wherein between the camshaft adjuster (2) and the actuator (4) via the central valve (3) can be filled with pressurized fluid Druckflidverteilraum (7) is provided with an armature space (8) of the actuator (4) is in communication and sealed to the environment, and wherein the actuator (4) at least one by means of a coil (18) movable armature (1 6), a pole core (27) and a Polrohr (28) as Polrohrbaugruppe (17), characterized in that the sealing of the Druckfluidverteilraums (7) by a cohesive and / or non-positive and positive connection of the actuator or one or more Actuator components with the central valve takes place.
2. Bausatz (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass der Anker (1 6) des Aktuators (4) in einer Hülse (22) axialverschieblich ist, wobei die Hülse (22) stoffschlüssig, insbesondere mittels Schweißen oder Kleben mit dem Zentralventil (3) verbunden ist. 2. Kit (1) according to claim 1, characterized in that the armature (1 6) of the actuator (4) in a sleeve (22) is axially displaceable, wherein the sleeve (22) cohesively, in particular by means of welding or gluing to the central valve (3) is connected.
3. Bausatz (1 ) nach Anspruch 2, dadurch gekennzeichnet, dass die Hülse (22) als spanlos dünn gefertigte Hülse vorgesehen ist und eine mittels Plasmanitrieren hergestellte Beschichtung aufweist. 3. kit (1) according to claim 2, characterized in that the sleeve (22) is provided as a chipless thin manufactured sleeve and has a coating produced by plasma nitriding.
4. Bausatz (1 ) nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Polrohr (28) und/oder der Polkern (27) auf einer Innenseite mehrere axiale, vorzugsweise aus Kunststoff angespritzte Zentrierrippen aus Kunststoff aufweist. 4. Kit (1) according to claim 2 or 3, characterized in that the pole tube (28) and / or the pole core (27) has on an inner side a plurality of axial, preferably molded plastic centering ribs made of plastic.
5. Bausatz (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass der Polkern (27) des Aktuators (4) stoffschlüssig, insbesondere mittels Schweißen oder Kleben mit dem Zentralventil verbunden ist. 5. Kit (1) according to claim 1, characterized in that the pole core (27) of the actuator (4) is integrally connected, in particular by means of welding or gluing with the central valve.
6. Bausatz (1 ) nach Anspruch 1 oder 5, dadurch gekennzeichnet, dass der Polkern (27) des Aktuators (4) kraft- und formschlüssig, insbesondere mittels einer Presspassung mit dem Zentralventil (3) verbunden ist. 6. Kit (1) according to claim 1 or 5, characterized in that the pole core (27) of the actuator (4) non-positively and positively, in particular by means of a press fit with the central valve (3) is connected.
7. Bausatz (1 ) nach Anspruch 6, dadurch gekennzeichnet, dass der Polkern mit dem Polrohr eine vormontierbare Polrohrbaugruppe (17) bildet und zwischen dem Polrohr und dem Polkern ein nicht-magnetisierbarer, mittels eines thermischen Verfahrens hergestellter Zwischenring vorgesehen ist, welcher Polrohr und Polkern stoffschlüssig verbindet. 7. kit (1) according to claim 6, characterized in that the pole core with the pole tube forms a preassemblable Polrohrbaugruppe (17) and between the pole tube and the Polkern a non-magnetizable, produced by a thermal process intermediate ring is provided, which pole tube and Polkern cohesively connects.
8. Bausatz (1 ) nach Anspruch 6, dadurch gekennzeichnet, dass der Polkern mit dem Polrohr eine Polrohrbaugruppe (17) bildet, bei welcher das Polrohr und der Polkern einteilig vorgesehen sind. 8. kit (1) according to claim 6, characterized in that the pole core with the pole tube forms a Polrohrbaugruppe (17), in which the pole tube and the pole core are provided integrally.
9. Bausatz (1 ) nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass ein Spulenkörper (21 ) der Spule (18) auf einer Innenseite mehrere axiale, vorzugsweise aus Kunststoff angespritzte Zentrierrippen (36) aus Kunststoff aufweist. 9. Kit (1) according to any one of claims 6 to 8, characterized in that a bobbin (21) of the coil (18) on an inner side a plurality of axial, preferably molded plastic centering ribs (36) made of plastic.
10. Bausatz (1 ) nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass wenigstens die Spule (18) mit einem Spulenkörper (21 ) sowie ein Gehäuse (19) des Aktuators (4) mittels eines oder mehrerer Gleitlager (33, 34, 35) auf der Polrohrbaugruppe (17) radial zentriert sind. 10. Kit (1) according to one of claims 6 to 8, characterized in that at least the coil (18) with a bobbin (21) and a housing (19) of the actuator (4) by means of one or more sliding bearings (33, 34 , 35) are radially centered on the pole tube assembly (17).
1 1 . Bausatz (1 ) nach Anspruch 10, dadurch gekennzeichnet, dass ein einziges Gleitlager (33) aus einem nicht eisenhaltigen Grundwerkstoff zwischen dem Spulenkörper (21 ) und der Polrohrbaugruppe (17) angeordnet ist. 1 1. Kit (1) according to claim 10, characterized in that a single sliding bearing (33) made of a non-ferrous base material between the bobbin (21) and the pile tube assembly (17) is arranged.
12. Bausatz (1 ) nach Anspruch 10, dadurch gekennzeichnet, dass zwei Gleitlager (34, 35) aus einem eisenhaltigen Grundwerkstoff axial außerhalb eines Magnetkreises angeordnet sind. 12. Kit (1) according to claim 10, characterized in that two plain bearings (34, 35) are arranged from a base material containing iron axially outside of a magnetic circuit.
13. Bausatz (1 ) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass zwischen dem Nockenwellenversteller (2), insbesondere zwischen dem Stator (5) und dem Zentralventil (3) ein Dichtungselement (25) vorgesehen ist. 13. Kit (1) according to one of the preceding claims, characterized in that between the camshaft adjuster (2), in particular between the stator (5) and the central valve (3), a sealing element (25) is provided.
14. Bausatz (1 ) nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass zwischen dem Nockenwellenversteller (2), insbesondere zwischen dem Stator (5) und dem Zentralventil (3) ein Lagerungselement vorgesehen ist. 14. Kit (1) according to one of the preceding claims, characterized in that between the camshaft adjuster (2), in particular between the stator (5) and the central valve (3) is provided a bearing element.
EP18783363.7A 2017-09-27 2018-09-14 Assembly comprising a camshaft phasing device Active EP3688288B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017122425.4A DE102017122425A1 (en) 2017-09-27 2017-09-27 Kit with a camshaft adjuster
PCT/EP2018/074859 WO2019063315A1 (en) 2017-09-27 2018-09-14 Kit having a camshaft phaser

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EP3688288A1 true EP3688288A1 (en) 2020-08-05
EP3688288B1 EP3688288B1 (en) 2021-08-11

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US (1) US10781728B2 (en)
EP (1) EP3688288B1 (en)
CN (1) CN110832171B (en)
DE (1) DE102017122425A1 (en)
WO (1) WO2019063315A1 (en)

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DE102017122425A1 (en) 2019-03-28
WO2019063315A1 (en) 2019-04-04
US10781728B2 (en) 2020-09-22
EP3688288B1 (en) 2021-08-11
CN110832171A (en) 2020-02-21
CN110832171B (en) 2021-09-10
US20200208545A1 (en) 2020-07-02

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