EP2459852B1 - Camshaft with camshaft adjuster - Google Patents
Camshaft with camshaft adjuster Download PDFInfo
- Publication number
- EP2459852B1 EP2459852B1 EP10814687.9A EP10814687A EP2459852B1 EP 2459852 B1 EP2459852 B1 EP 2459852B1 EP 10814687 A EP10814687 A EP 10814687A EP 2459852 B1 EP2459852 B1 EP 2459852B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camshaft
- tube
- elements
- actuator
- camshaft 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.)
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- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
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- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow camshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34426—Oil control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- 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
- F01L2301/00—Using particular materials
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
- F01L2820/041—Camshafts position or phase sensors
Definitions
- the invention relates to a camshaft for actuating the gas exchange valves of an internal combustion engine, with a camshaft tube, a hydraulic camshaft adjuster, a valve for controlling the camshaft adjuster supplied hydraulic fluid and arranged in the interior of the camshaft tube actuator for actuating the valve, which secured in the axial direction against displacement is.
- a camshaft having the features of the preamble of claim 1 is from the document WO 2009/009328 A1 known.
- the actuator is formed in this known camshaft as an electromagnet (solenoid), which does not rotate with a rotation of the camshaft with the camshaft tube.
- the solenoid is always arranged cylinder head fixed, ie it is firmly connected to the cylinder head of the engine. Two different embodiments are described how the solenoid can be arranged in the interior of the camshaft. According to a first embodiment, the solenoid is mounted on the one hand via a arranged in the interior of the camshaft tube bearing element and on the other hand via a tubular connecting element and an end piece fixedly connected to the cylinder head of the engine.
- tubular shaft or torque tube 116 can also be used to guide cables to power the solenoid.
- the solenoid over the first embodiment has an increased length and is directly attached even to the cylinder head / engine block of the engine, so that can be dispensed with the required in the first embodiment, the bearing element and the tubular connecting element.
- the invention is based on the object a camshaft for actuating the gas exchange valves of an internal combustion engine with the features of the preamble of claim 1 indicate that has a low weight and in addition to the actuator and possibly the valve even more functional elements in the interior of the camshaft can be integrated. It should also be possible to arrange at the camshaft adjuster opposite end of the camshaft, an oil or vacuum pump, which is driven by the camshaft.
- the actuating device for actuating the valve is designed as an electromagnetic or piezoelectric actuator and rotationally fixed connected to the camshaft tube. Therefore, in the present invention, the actuator rotates with the camshaft and no separate holding and connecting elements are required for holding the actuator in the camshaft tube and attaching it to the cylinder head. Also, an extension of the actuator in the axial direction to directly, ie without separate holding and connecting elements, to attach to the cylinder head / engine block is not required. The arranged next to the actuator interior of the camshaft tube remains free and can be used for the introduction of other functional elements in the camshaft or for other uses.
- an oil or vacuum pump can be arranged in the invention easily, which is driven by the camshaft.
- the designer has compared to the known from the prior art solution on other opportunities for the use of existing by the camshaft rotation drive energy.
- the actuating device is non-positively or positively or force and positively pressed into the interior of the camshaft tube.
- the actuator can not or only with greater difficulty removed from the camshaft tube, for example, if it is defective. In the case of a defect of the actuator then usually the entire camshaft must be replaced.
- the connection between the actuating device and the camshaft tube is a releasable connection.
- a detachable connection may be, for example, a latching connection or a screw connection.
- crankshaft tube In order to be able to supply power to the actuating device, rotationally fixedly provided in the interior of the camshaft tube with this connected power supply means.
- These may e.g. be designed as electrical lines, which are connected on the one hand with the camshaft tube and on the other hand with the actuating device.
- the power supply means the current is fed via non-rotatably connected to the camshaft tube elements according to an embodiment of the invention.
- These elements may e.g. be arranged on the outer circumference of the camshaft tube or in the interior of the camshaft tube.
- the elements may be e.g. be designed as annular brushes, slip rings or induction coils.
- the non-rotatably connected to the camshaft tube elements may be associated with stationary means by which the current for the supply of the actuator is transmitted to the co-rotating with the camshaft elements or induced in these elements.
- These stationary means can e.g. be designed as stationary brushes, sliding contacts or electromagnetic coils.
- the non-rotatably connected to the camshaft tube elements encoder elements and the stationary means have sensor elements of a camshaft position determining device.
- the components required for power transmission can be used simultaneously to form a required anyway in most applications position determining device for determining the rotational position of the camshaft.
- the valve is arranged in the interior of the camshaft tube and rotatably connected thereto. This integration of the valve into the interior of the camshaft tube, the actuation of the valve is facilitated by the actuator and it can be required for the camshaft axial space to be further reduced.
- Fig. 1 shows a camshaft according to the invention in axial half-section.
- a hydraulic phaser 2 is arranged in a conventional manner.
- Such camshaft adjusters have drive elements which are directly or indirectly connected to the crankshaft of the internal combustion engine and driven by the latter.
- Nockenwellenversteller with the camshaft tube 1 connected adjustment, which can be rotated by hydraulic actuation relative to the drive elements to realize a phase adjustment of the camshaft relative to the crankshaft.
- Such known camshaft adjuster 2 are controlled by hydraulic valves. This means that a hydraulic phaser over a hydraulic valve in a manner required for the desired adjustment, the adjustment causing hydraulic fluid is supplied. By the hydraulic fluid of the camshaft tube 1 rotatably connected part of the camshaft adjuster 2 is rotated relative to the portion of the camshaft adjuster 2 driven by the crankshaft.
- the hydraulic valve 3 is arranged in the interior 4 of the camshaft and rotatably connected to the camshaft tube 1.
- the hydraulic valve 3 actuated actuator 5 is disposed in the interior 4 of the camshaft tube 1 and rotatably connected thereto.
- the actuating device 5 is designed as an electromagnetic or piezoelectric or electrical actuator.
- the actuator 5 is in the embodiment according to Fig. 1 been pressed into the camshaft tube 1, so that it is non-positively and / or positively connected to the camshaft tube 1.
- the connection between the actuating device 5 and the camshaft tube 1 can also be designed as a releasable connection.
- the actuator 5, for example, with the inner wall of the camshaft tube 1 form a clearance and be axially fixed by a introduced into the camshaft tube 1 or cooperating with this fixing.
- a fixing element may for example be a snap ring which is inserted into a corresponding groove in the inner wall of the camshaft tube 1.
- a locking lug on the actuating device would be conceivable, which engages in a corresponding recess in the camshaft tube 1.
- a releasable connection between the actuator 5 and the camshaft tube 1 has the advantage that the actuator 5 can be easily replaced if it is damaged. It is not necessary in this case to replace the entire camshaft.
- the rotatably connected to the camshaft tube 1 actuator 5 is supplied via non-rotatably connected to the camshaft tube 1 power supply means 6 with power.
- These are in Fig. 1 only indicated schematically. In the illustrated embodiment, the power supply takes place from the radial direction from outside the camshaft tube 1.
- the power supply means 6 may be formed differently and arranged differently. This will be discussed further below.
- the actuating device 5 has an actuating pin 11.
- the actuating pin 11 acts on a displaceable in the axial direction control piston of the hydraulic valve 3, by which in turn the camshaft adjuster supplied hydraulic fluid is controlled.
- the actuating pin 11 operates against a return spring 12, through which the control piston of the valve 3 is pushed back into an initial position or is withdrawn when no force is exerted on the control piston 11 of the actuating pin.
- Fig. 2 is shown a first way, as the actuator 5, the necessary power can be supplied.
- the power supply means 6 are rotatably connected to the camshaft tube first connected element 7 connected.
- the element 7 is designed as a co-rotating with the camshaft brush element.
- the element 7 is associated with a stationary means 8, by which the current for the supply of the actuator 5 is transmitted to the element 7.
- the means 8 according to the embodiment according to Fig. 2 it is a stationary arranged brush element.
- Fig. 3 illustrated embodiment is one compared to Fig. 2 another power supply device provided.
- the rotatably connected to the camshaft tube 1 element 7 is formed as a slip ring.
- the slip ring acts together with an associated means 8, which is designed as a sliding contact.
- the current required for the actuator 5 is generated by induction.
- the rotatably connected to the camshaft tube 1 element 7 has a first induction coil 13.
- the element 7 is associated with a stationary means 8, which also has a coil 14 which can be supplied with power.
- the in the Fig. 2, 3 and 4 shown possibilities for the supply of power to the actuator 5 are merely exemplary. Other arrangements and configurations of the power supply devices are conceivable.
- the power supply does not have to be in the radial direction, but it can also be done in the axial direction.
- the power supply means can be integrated into the interior 4 of the camshaft tube 1 and the power supply can be effected in the axial direction.
- Fig. 5 shows one opposite Fig. 1 modified embodiment of the invention.
- the actuating device 5 is formed integrally with the hydraulic valve 3 in this embodiment of the invention.
- the housing of the actuating device 5 is integrally formed with the housing of the valve 3 or that these two housing formed at least as a built assembly which can be pre-assembled in the camshaft before assembly. This allows a simpler installation can be achieved.
- the control piston of the hydraulic valve 3 is not actuated via an actuating pin 11 of the actuator 5, as shown in FIG Fig. 1 is shown, but that the control piston of the valve 3 is fixedly connected to the armature of the electromagnetic actuator 5, or that the control piston of the valve 3 itself forms the armature of the electromagnetic actuator 5.
- the actuator 5 is supplied via rotatably connected to the camshaft tube 1 lines 15 with power.
- a first induction coil 13 is arranged rotationally fixed.
- the first induction coil 13 rotates together with the camshaft tube 1 relative to a stationarily arranged and current-carrying second coil 14. In this way, the required for the actuation of the actuator 5 current is generated by induction in the induction coil 13 and fed via lines 15 of the actuator.
- Fig. 6 shows an embodiment of the invention with a taking place in the axial direction of power supply to the actuator 5.
- a slip ring sleeve 16 is used rotatably.
- the slip ring sleeve 16 has slip rings 17, 18.
- a stationary line feed 19 is arranged, which is in contact with the rotating slip rings 17, 18 via sliding contacts 20, 21.
- the line feed 19 has current-carrying wires, via which the current required for the activation of the actuating device 5 is supplied to the sliding contacts 20, 21.
- the control current is transmitted to the lines 15 and the actuator 5 is supplied.
- the line feed 19 is held centered in the interior of the slip ring sleeve 16.
- the annular element 22 may optionally have a seal against oil (eg from the vicinity of the camshaft).
- the annular element 22 may also be designed as a bearing, for example as a roller bearing.
- a trained as a bearing element 22 may also include a sealing element, so that in addition to the bearing function and a sealing function is met.
- a donor element 9 is integrated in the non-rotatably connected to the camshaft tube 1 element 7 with the first induction coil 13.
- the co-rotating donor element 9 may, for example, a stepped metallic sensor ring such. be known from the prior art basically known so-called trigger wheel.
- the sensor ring may be e.g. be formed of plastic with cast metallic particles or as a sensor ring made of plastic with integrated metallic segments.
- a sensor element 10 is integrated in the stationarily arranged means 8, which is associated with the non-rotatably connected to the camshaft tube 1 element 7, in addition to the second current-charged induction coil 14, a sensor element 10 is integrated.
- known camshaft position sensors such as e.g. so-called Hall sensors or magnetoresistive position sensors in question.
- other sensor elements can be used. It is not important according to the invention which donor element or which sensor element or which combination of donor element and sensor element is used, but that the donor element and the sensor element are integrated in the elements 7 and means 8 of the power supply device. A separate camshaft position determining device is therefore not required.
- the arranged in the stationary means 8 sensor element 10 is connected via lines 23 to an evaluation and control unit, not shown.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Die Erfindung betrifft eine Nockenwelle zur Betätigung der Gaswechselventile eines Verbrennungsmotors, mit einem Nockenwellenrohr, einem hydraulischen Nockenwellenversteller, einem Ventil zur Steuerung der dem Nockenwellenversteller zugeführten Hydraulikflüssigkeit und einer in dem Innenraum des Nockenwellenrohrs angeordneten Betätigungseinrichtung zum Betätigen des Ventils, die in axialer Richtung gegen Verschieben gesichert ist.The invention relates to a camshaft for actuating the gas exchange valves of an internal combustion engine, with a camshaft tube, a hydraulic camshaft adjuster, a valve for controlling the camshaft adjuster supplied hydraulic fluid and arranged in the interior of the camshaft tube actuator for actuating the valve, which secured in the axial direction against displacement is.
Eine Nockenwelle mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 ist aus der Druckschrift
Die aus der
Ein weiterer Nachteil der aus der
Der Erfindung liegt die Aufgabe zu Grunde eine Nockenwelle zur Betätigung der Gaswechselventile eines Verbrennungsmotors mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 anzugeben, die ein geringes Gewicht aufweist und bei der neben der Betätigungseinrichtung und ggf. dem Ventil auch noch weitere Funktionselemente in den Innenraum der Nockenwelle integriert werden können. Auch soll es möglich sein, an dem dem Nockenwellenversteller gegenüber liegenden Ende der Nockenwelle eine Öl- oder Vakuumpumpe anzuordnen, die von der Nockenwelle antreibbar ist.The invention is based on the object a camshaft for actuating the gas exchange valves of an internal combustion engine with the features of the preamble of
Gelöst wird diese Aufgabe durch eine Nockenwelle mit den Merkmalen des Patentanspruchs 1. Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.This object is achieved by a camshaft with the features of
Erfindungsgemäß ist die Betätigungseinrichtung zum Betätigen des Ventils als elektromagnetische oder piezoelektrische Betätigungseinrichtung ausgebildet und drehfest mit dem Nockenwellenrohr verbunden. Daher dreht sich die Betätigungseinrichtung bei der vorliegenden Erfindung mit der Nockenwelle mit und es sind keine gesonderten Halte- und Verbindungselemente zum Halten der Betätigungseinrichtung im Nockenwellenrohr und zu deren Befestigung an dem Zylinderkopf erforderlich. Auch eine Verlängerung der Betätigungseinrichtung in axialer Richtung, um sie direkt, d.h. ohne gesonderte Halte- und Verbindungselemente, an dem Zylinderkopf/dem Motorblock zu befestigen, ist nicht erforderlich. Der neben der Betätigungseinrichtung angeordnete Innenraum des Nockenwellenrohrs bleibt frei und kann für das Einbringen anderer Funktionselemente in die Nockenwelle oder für andere Verwendungen genutzt werden.According to the invention, the actuating device for actuating the valve is designed as an electromagnetic or piezoelectric actuator and rotationally fixed connected to the camshaft tube. Therefore, in the present invention, the actuator rotates with the camshaft and no separate holding and connecting elements are required for holding the actuator in the camshaft tube and attaching it to the cylinder head. Also, an extension of the actuator in the axial direction to directly, ie without separate holding and connecting elements, to attach to the cylinder head / engine block is not required. The arranged next to the actuator interior of the camshaft tube remains free and can be used for the introduction of other functional elements in the camshaft or for other uses.
Die entfallenden gesonderten Halte- und Verbindungselemente bzw. der Verzicht auf die Verlängerung der Betätigungseinrichtung in axialer Richtung und deren direkter Befestigung am Zylinderkopf/Motorblock führen zu erheblichen Gewichtseinsparungen. Ein im Innenraum des Nockenwellenrohrs angeordnetes Lagerelement zur Aufnahme der Betätigungseinrichtung ist bei der erfindungsgemäßen Lösung nicht erforderlich, so dass durch die Erfindung auch diesbezüglich Gewicht und Kosten (insbesondere Material- und Fertigungskosten) eingespart werden.The omitted separate holding and connecting elements or the waiver of the extension of the actuator in the axial direction and their direct attachment to the cylinder head / engine block lead to significant weight savings. A arranged in the interior of the camshaft tube bearing element for receiving the actuator is not required in the inventive solution, so that in this regard also weight and costs (in particular material and manufacturing costs) can be saved by the invention.
An dem dem Nockenwellenversteller gegenüber liegenden Ende der Nockenwelle kann bei der Erfindung ohne Weiteres eine Öl- oder Vakuumpumpe angeordnet werden, welche von der Nockenwelle antreibbar ist. Damit verfügt der Konstrukteur im Vergleich zu der aus dem Stand der Technik bekannten Lösung über weitere Möglichkeiten zur Ausnutzung der durch die Nockenwellendrehung vorhandenen Antriebsenergie.At the camshaft adjuster opposite end of the camshaft, an oil or vacuum pump can be arranged in the invention easily, which is driven by the camshaft. Thus, the designer has compared to the known from the prior art solution on other opportunities for the use of existing by the camshaft rotation drive energy.
Nach einer Ausführungsform der Erfindung wird die Betätigungseinrichtung kraftschlüssig oder formschlüssig oder kraft- und formschlüssig in den Innenraum des Nockenwellenrohrs eingepresst. In diesem Fall kann die Betätigungseinrichtung nicht oder nur mit größeren Schwierigkeiten aus dem Nockenwellenrohr entfernt werden, wenn sie z.B. defekt ist. Im Fall eines Defekts der Betätigungseinrichtung muss dann in der Regel die gesamte Nockenwelle ersetzt werden. Um dies zu vermeiden kann erfindungsgemäß vorgesehen sein, dass die Verbindung zwischen der Betätigungseinrichtung und dem Nockenwellenrohr eine lösbare Verbindung ist. Eine solche lösbare Verbindung kann z.B. eine Rastverbindung oder eine Schraubverbindung sein.According to one embodiment of the invention, the actuating device is non-positively or positively or force and positively pressed into the interior of the camshaft tube. In this case, the actuator can not or only with greater difficulty removed from the camshaft tube, for example, if it is defective. In the case of a defect of the actuator then usually the entire camshaft must be replaced. To avoid this, it can be provided according to the invention that the connection between the actuating device and the camshaft tube is a releasable connection. Such a detachable connection may be, for example, a latching connection or a screw connection.
Um der Betätigungseinrichtung Strom zuführen zu können, sind im Innenraum des Nockenwellenrohrs drehfest mit diesem verbundene Stromzuführungsmittel vorgesehen. Diese können z.B. als elektrische Leitungen ausgebildet sein, die einerseits mit dem Nockenwellenrohr und andererseits mit der Betätigungseinrichtung verbunden sind.In order to be able to supply power to the actuating device, rotationally fixedly provided in the interior of the camshaft tube with this connected power supply means. These may e.g. be designed as electrical lines, which are connected on the one hand with the camshaft tube and on the other hand with the actuating device.
Den Stromzuführungsmitteln wird nach einer Ausführungsform der Erfindung der Strom über drehfest mit dem Nockenwellenrohr verbundene Elemente zugeleitet. Diese Elemente können z.B. am Außenumfang des Nockenwellenrohrs oder im Innenraum des Nockenwellrohrs angeordnet sein. So können die Elemente z.B. als ringförmige Bürsten, Schleifringe oder Induktionsspulen ausgebildet sein.The power supply means, the current is fed via non-rotatably connected to the camshaft tube elements according to an embodiment of the invention. These elements may e.g. be arranged on the outer circumference of the camshaft tube or in the interior of the camshaft tube. Thus, the elements may be e.g. be designed as annular brushes, slip rings or induction coils.
Den drehfest mit dem Nockenwellenrohr verbundenen Elementen können stationäre Mittel zugeordnet sein, durch welche der Strom für die Versorgung der Betätigungseinrichtung auf die mit der Nockenwelle mitdrehenden Elemente übertragen oder in diesen Elementen induziert wird. Diese stationären Mittel können z.B. als stationäre Bürsten, Schleifkontakte oder elektromagnetische Spulen ausgebildet sein.The non-rotatably connected to the camshaft tube elements may be associated with stationary means by which the current for the supply of the actuator is transmitted to the co-rotating with the camshaft elements or induced in these elements. These stationary means can e.g. be designed as stationary brushes, sliding contacts or electromagnetic coils.
Im Rahmen der Stromübertragung kann erfindungsgemäß vorgesehen sein, dass die mit dem Nockenwellenrohr drehfest verbundenen Elemente Geberelemente und die stationären Mittel Sensorelemente einer Nockenwellenpositionsbestimmungseinrichtung aufweisen. Auf diese Weise können die für die Stromübertragung erforderlichen Bauteile gleichzeitig dazu genutzt werden, eine in den meisten Anwendungsfällen ohnehin erforderliche Positionsbestimmungseinrichtung zur Bestimmung der Drehposition der Nockenwelle zu bilden.In the context of power transmission can be inventively provided that the non-rotatably connected to the camshaft tube elements encoder elements and the stationary means have sensor elements of a camshaft position determining device. In this way, the components required for power transmission can be used simultaneously to form a required anyway in most applications position determining device for determining the rotational position of the camshaft.
Nach einer weiteren Ausführungsform der Erfindung ist auch das Ventil im Innenraum des Nockenwellenrohrs angeordnet und drehfest mit diesem verbunden. Durch diese Integration auch des Ventils in den Innenraum des Nockenwellenrohrs wird die Betätigung des Ventils durch die Betätigungseinrichtung erleichtert und es kann der für die Nockenwelle benötigte axiale Bauraum weiter reduziert werden.According to a further embodiment of the invention, the valve is arranged in the interior of the camshaft tube and rotatably connected thereto. This integration of the valve into the interior of the camshaft tube, the actuation of the valve is facilitated by the actuator and it can be required for the camshaft axial space to be further reduced.
Im Folgenden wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Im Einzelnen zeigen
- Fig. 1
- eine erfindungsgemäße Nockenwelle im axialen Halbschnitt,
- Fig. 2
- eine erste Möglichkeit der Stromzuführung für die Stromversorgung der Betätigungseinrichtung,
- Fig. 3
- eine zweite Möglichkeit für die Stromzuführung zur Betätigungseinrichtung,
- Fig. 4
- eine dritte Möglichkeit für die Stromzuführung zu der Betätigungseinrichtung,
- Fig. 5
- eine erfindungsgemäße Nockenwelle in einer gegenüber
Fig. 1 anderen Ausführungsform, - Fig. 6
- eine erfindungsgemäße Nockenwelle in einer gegenüber
Fig. 1 undFig. 5 anderen Ausführungsform, - Fig. 7
- eine erfindungsgemäße Nockenwelle mit einer in die Stromzuführungseinrichtung integrierten Nockenwellenpositionsbestimmungseinrichtung.
- Fig. 1
- a camshaft according to the invention in axial half section,
- Fig. 2
- a first possibility of the power supply for the power supply of the actuator,
- Fig. 3
- a second possibility for the power supply to the actuator,
- Fig. 4
- a third possibility for the power supply to the actuator,
- Fig. 5
- a camshaft according to the invention in a opposite
Fig. 1 another embodiment, - Fig. 6
- a camshaft according to the invention in a opposite
Fig. 1 andFig. 5 another embodiment, - Fig. 7
- a camshaft according to the invention with a camshaft position determining device integrated into the power supply device.
Derartige bekannte Nockenwellenversteller 2 werden über hydraulische Ventile angesteuert. Dies bedeutet, dass einem hydraulischen Nockenwellenversteller über ein hydraulisches Ventil in einer für die gewünschte Verstellung erforderlichen Weise die die Verstellung bewirkende Hydraulikflüssigkeit zugeleitet wird. Durch die Hydraulikflüssigkeit wird der mit dem Nockenwellenrohr 1 drehfest verbundene Teil des Nockenwellenverstellers 2 relativ zu dem von der Kurbelwelle angetriebenen Teil des Nockenwellenverstellers 2 verdreht.Such known
Bei der erfindungsgemäßen Nockenwelle gemäß
Auch die das hydraulische Ventil 3 betätigende Betätigungseinrichtung 5 ist im Innenraum 4 des Nockenwellenrohres 1 angeordnet und drehfest mit diesem verbunden. Erfindungsgemäß ist die Betätigungseinrichtung 5 als elektromagnetischer oder piezoelektrischer oder elektrischer Aktuator ausgebildet.Also, the
Da die Betätigungseinrichtung 5 drehfest mit dem Nockenwellenrohr 1 verbunden ist, ist es nicht erforderlich, separate Befestigungseinrichtungen vorzusehen, mit denen die Betätigungseinrichtung mittelbar oder unmittelbar mit dem Motorblock/dem Zylinderkopf des Motors verbunden ist. Der gesamte, sich in
Die Betätigungseinrichtung 5 ist in der Ausführungsform gemäß
Eine lösbare Verbindung zwischen der Betätigungseinrichtung 5 und dem Nockenwellenrohr 1 hat den Vorteil, dass die Betätigungseinrichtung 5 auf einfache Weise ausgewechselt werden kann, sollte sie einmal beschädigt sein. Es ist in diesem Fall nicht erforderlich, die gesamte Nockenwelle auszutauschen.A releasable connection between the
Die drehfest mit dem Nockenwellenrohr 1 verbundene Betätigungseinrichtung 5 wird über drehfest mit dem Nockenwellenrohr 1 verbundene Stromzuführungsmittel 6 mit Strom versorgt. Diese sind in
Die Betätigungseinrichtung 5 weist einen Betätigungsstift 11 auf. In Abhängigkeit von der dem Betätigungselement 5 zugeführten Stromstärke bzw. von der an das Betätigungselement 5 angelegten Spannung wird der Betätigungsstift 11 in Axialrichtung verschoben. Der Betätigungsstift 11 wirkt auf einen in Axialrichtung verschiebbaren Steuerkolben des hydraulischen Ventils 3 ein, durch den wiederum die dem Nockenwellenversteller zugeleitete Hydraulikflüssigkeit gesteuert wird. Dabei arbeitet der Betätigungsstift 11 gegen eine Rückstellfeder 12, durch welche der Steuerkolben des Ventils 3 in eine Ausgangsstellung zurückgedrückt wird bzw. zurückgezogen wird, wenn von dem Betätigungsstift 11 keine Kraft auf den Steuerkolben ausgeübt wird.The
In
Bei der in
Bei der Ausführungsform nach
Die in den
Über ein ringförmiges Element 22 ist die Leitungszuführung 19 im Innenraum der Schleifringhülse 16 zentriert gehalten. Das ringförmige Element 22 kann optional eine Dichtung gegen Öl (z.B. aus der Umgebung der Nockenwelle) aufweisen. Das ringförmige Element 22 kann auch als Lager, z.B. als Wälzlager, ausgebildet sein. Ein als Lager ausgebildetes Element 22 kann auch ein Dichtungselement umfassen, so dass neben der Lagerfunktion auch eine Dichtfunktion erfüllt wird.Via an
Bei der erfindungsgemäßen Nockenwelle ist es vorteilhaft in besonders einfacher Weise möglich, eine in vielen Fällen ohnehin erforderliche Nockenwellenpositionsbestimmungseinrichtung in die Stromzuführungseinrichtung für die Stromversorgung der Betätigungseinrichtung 5 zu integrieren. Dies ist beispielhaft in
In das drehfest mit dem Nockenwellenrohr 1 verbundene Element 7 mit der ersten Induktionsspule 13 ist ein Geberelement 9 integriert. Das mitdrehende Geberelement 9 kann beispielsweise ein abgesetzter metallischer Sensorring wie z.B. ein aus dem Stand der Technik grundsätzlich bekanntes sogenanntes Triggerrad sein. Alternativ kann der Sensorring z.B. aus Kunststoff mit eingegossenen metallischen Partikeln ausgebildet sein oder als Sensorring aus Kunststoff mit integrierten metallischen Segmenten.In the non-rotatably connected to the
In das stationär angeordnete Mittel 8, das dem drehfest mit dem Nockenwellenrohr 1 verbundenen Element 7 zugeordnet ist, ist zusätzlich zur zweiten strombeaufschlagten Induktionsspule 14 ein Sensorelement 10 integriert. Als Sensorelement 10 kommen bekannte Nockenwellenpositionssensoren wie z.B. sogenannte Hall-Sensoren oder magnetoresistive Positionssensoren in Frage. Je nach Ausführungsform des Geberelementes 9 können auch andere Sensorelemente verwendet werden. Wichtig ist erfindungsgemäß nicht, welches Geberelement bzw. welches Sensorelement oder welche Kombination von Geberelement und Sensorelement verwendet wird, sondern dass das Geberelement und das Sensorelement in die Elemente 7 und Mittel 8 der Stromzuführungseinrichtung integriert sind. Eine gesonderte Nockenwellenpositionsbestimmungseinrichtung ist daher nicht erforderlich.In the stationarily arranged
Das in dem stationären Mittel 8 angeordnete Sensorelement 10 ist über Leitungen 23 mit einer nicht dargestellten Auswerte- und Steuereinheit verbunden.The arranged in the
- 11
- Nockenwellenrohrcamshaft tube
- 22
- NockenwellenverstellerPhaser
- 33
- VentilValve
- 44
- Innenrauminner space
- 55
- Betätigungseinrichtungactuator
- 66
- StromzuführungsmittelPower supply means
- 77
- Elementelement
- 88th
- Mittelmedium
- 99
- Geberelementtransmitter element
- 1010
- Sensorelementsensor element
- 1111
- Betätigungsstiftactuating pin
- 1212
- RückstellfederReturn spring
- 1313
- Induktionsspuleinduction coil
- 1414
- SpuleKitchen sink
- 1515
- Leitungencables
- 1616
- SchleifringhülseSlip ring sleeve
- 1717
- Schleifringslip ring
- 1818
- Schleifringslip ring
- 1919
- Leitungszuführungline feed
- 2020
- Schleifkontaktsliding contact
- 2121
- Schleifkontaktsliding contact
- 2222
- Elementelement
- 2323
- Leitungencables
Claims (7)
- Camshaft for actuating the gas exchange valves of an internal combustion engine, having a camshaft tube (1), a hydraulic camshaft adjuster (2), a valve (3) for controlling the hydraulic fluid which is fed to the camshaft adjuster (2), and an actuating device (5) which is arranged in the interior (4) of the camshaft tube (1) for actuating the valve (3) which activating device (5) is secured against displacement in the axial direction, the actuating device (5) being configured as an electromagnetic, piezo-electric or electric actuator and being connected fixedly to the camshaft tube (1) so as to rotate with it.
- Camshaft according to Claim 1, characterized in that the connection between the actuating device (5) and the camshaft tube (1) is a releasable connection.
- Camshaft according to Claim 1 or 2, characterized in that current feeding means (6) which are connected fixedly to the camshaft tube (1) so as to rotate with it are provided in the interior (4) of the said camshaft tube (1) for feeding current to the actuating device (5).
- Camshaft according to Claim 3, characterized in that elements (7) which are connected fixedly to the camshaft tube (1) so as to rotate with it are provided, via which elements (7) the current can be guided to the current feeding means (6).
- Camshaft according to Claim 4, characterized in that the elements (7) which are connected fixedly to the camshaft tube (1) so as to rotate with it are assigned stationary means (8), by way of which the current for supplying the actuating device (5) is transmitted to the elements (7) or is induced in the elements (7).
- Camshaft according to Claim 5, characterized in that the elements (7) which are connected fixedly to the camshaft tube (1) so as to rotate with it have transmitter elements (9) and the stationary means (8) have sensor elements (10) of a camshaft position determining device.
- Camshaft according to one of the preceding claims, characterized in that the valve (3) is arranged in the interior (4) of the camshaft tube (1) and is connected fixedly to the latter so as to rotate with it.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009035632A DE102009035632B3 (en) | 2009-07-31 | 2009-07-31 | Camshaft for actuation of gas shuttle valve of internal combustion engine, comprises camshaft pipe, hydraulic camshaft adjuster, and valve for controlling hydraulic fluid supplied to camshaft adjuster |
PCT/EP2010/004219 WO2011060840A2 (en) | 2009-07-31 | 2010-07-10 | Camshaft with camshaft adjuster |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2459852A2 EP2459852A2 (en) | 2012-06-06 |
EP2459852B1 true EP2459852B1 (en) | 2014-12-10 |
Family
ID=43571265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10814687.9A Active EP2459852B1 (en) | 2009-07-31 | 2010-07-10 | Camshaft with camshaft adjuster |
Country Status (6)
Country | Link |
---|---|
US (1) | US8844482B2 (en) |
EP (1) | EP2459852B1 (en) |
JP (1) | JP2013501179A (en) |
CN (1) | CN102482956B (en) |
DE (1) | DE102009035632B3 (en) |
WO (1) | WO2011060840A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011055651B4 (en) * | 2011-11-23 | 2017-12-07 | Thyssenkrupp Presta Teccenter Ag | camshaft assembly |
DE102013001016A1 (en) * | 2013-01-22 | 2014-07-24 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Camshaft assembly installed in internal combustion engine of motor vehicle, has actuator that is provided for shifting control valve piston for selectively opening and closing pressure chamber of camshaft adjuster |
DE102013103895A1 (en) | 2013-04-17 | 2014-10-23 | Hilite Germany Gmbh | Camshaft adjusting device with rotating actuator |
DE102016201851A1 (en) * | 2016-02-08 | 2017-08-10 | Robert Bosch Gmbh | Sensor device for determining at least one rotational property of a rotating element |
EP3561243B1 (en) * | 2018-04-26 | 2021-01-13 | Volvo Car Corporation | Camshaft arrangement |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3534412C2 (en) | 1984-10-02 | 1996-08-29 | Hermann Dr Ing Danckert | Device for load and speed-dependent adjustment of the timing of a gas exchange valve of an internal combustion engine |
US4967701A (en) * | 1989-01-12 | 1990-11-06 | Nippondenso Co., Ltd. | Valve timing adjuster |
DE4116169A1 (en) * | 1991-05-17 | 1992-11-19 | Bosch Gmbh Robert | DEVICE FOR ADJUSTING THE TURNING ANGLE ASSIGNMENT OF A CAMSHAFT TO YOUR DRIVE ELEMENT |
JPH04132414U (en) * | 1991-05-29 | 1992-12-08 | 株式会社アツギユニシア | Internal combustion engine valve timing control device |
JPH10121919A (en) * | 1996-10-21 | 1998-05-12 | Asmo Co Ltd | Phase control method of rotated body with respect to rotor and its control mechanism, and valve timing control method and its control apparatus for internal combustion engine |
EP1248007B1 (en) * | 2001-04-06 | 2004-01-14 | BorgWarner Inc. | Viscous coupling |
JP2004301233A (en) * | 2003-03-31 | 2004-10-28 | Denso Corp | Manufacturing method for electric spool valve |
DE102005053187A1 (en) * | 2005-11-08 | 2007-05-10 | Daimlerchrysler Ag | Adjusting device for an internal combustion engine |
WO2009009328A1 (en) * | 2007-07-06 | 2009-01-15 | Borgwarner Inc. | Variable cam timing controls mounted in the camshaft |
DE102008056411A1 (en) * | 2008-11-07 | 2010-05-20 | Dürr Systems GmbH | Coating plant component, in particular bell cup, and corresponding manufacturing method |
JP5360173B2 (en) * | 2011-09-15 | 2013-12-04 | 株式会社デンソー | Valve timing adjustment device |
-
2009
- 2009-07-31 DE DE102009035632A patent/DE102009035632B3/en not_active Expired - Fee Related
-
2010
- 2010-07-10 JP JP2012521995A patent/JP2013501179A/en active Pending
- 2010-07-10 CN CN201080028030.3A patent/CN102482956B/en not_active Expired - Fee Related
- 2010-07-10 WO PCT/EP2010/004219 patent/WO2011060840A2/en active Application Filing
- 2010-07-10 EP EP10814687.9A patent/EP2459852B1/en active Active
- 2010-07-10 US US13/387,975 patent/US8844482B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2013501179A (en) | 2013-01-10 |
WO2011060840A2 (en) | 2011-05-26 |
US8844482B2 (en) | 2014-09-30 |
CN102482956B (en) | 2014-10-22 |
DE102009035632B3 (en) | 2011-03-17 |
CN102482956A (en) | 2012-05-30 |
WO2011060840A3 (en) | 2011-07-14 |
EP2459852A2 (en) | 2012-06-06 |
US20130068180A1 (en) | 2013-03-21 |
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