EP2362074B1 - Dispositif destiné au calage variable des soupapes d'un moteur à combustion interne - Google Patents

Dispositif destiné au calage variable des soupapes d'un moteur à combustion interne Download PDF

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Publication number
EP2362074B1
EP2362074B1 EP11151488A EP11151488A EP2362074B1 EP 2362074 B1 EP2362074 B1 EP 2362074B1 EP 11151488 A EP11151488 A EP 11151488A EP 11151488 A EP11151488 A EP 11151488A EP 2362074 B1 EP2362074 B1 EP 2362074B1
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EP
European Patent Office
Prior art keywords
pressure
drive element
drive
combustion engine
depression
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.)
Not-in-force
Application number
EP11151488A
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German (de)
English (en)
Other versions
EP2362074A1 (fr
Inventor
Jürgen Weber
Stefan Schelter
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.)
Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP2362074A1 publication Critical patent/EP2362074A1/fr
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Publication of EP2362074B1 publication Critical patent/EP2362074B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the invention relates to a device for variably setting the timing of gas exchange valves of an internal combustion engine with a drive element which can be brought into drive connection with a crankshaft of the internal combustion engine, an output element which is arranged in drive connection with a camshaft of the internal combustion engine and pivotally mounted to the drive element, and at least one side cover, which is arranged on an axial side surface of the output element or the drive element and rotatably connected to the drive element or the driven element and having a disk-shaped portion, wherein within the device at least one pressure chamber is provided and wherein by pressure medium supply to or pressure fluid discharge of the Pressure chamber a phase angle between the drive element and the output element is variably adjustable.
  • devices for variable adjustment of the timing of gas exchange valves are used to adjust the phase relation between a crankshaft and a camshaft in a defined angular range, between a maximum early and a maximum late position variable.
  • the device is integrated in a drive train via which torque is transmitted from the crankshaft to the camshaft.
  • This drive train can be realized for example as a belt, chain or gear drive.
  • the device is non-rotatably connected to a camshaft and, for example, have one or more pressure chambers, by means of which the phase relation between the crankshaft and the camshaft can be selectively changed by pressure medium.
  • Such a device is for example from the DE 10 2004 026 865 A1 known.
  • the device has a drive element, an output element and two side covers, wherein the drive element is in driving connection with a crankshaft and the output element is non-rotatably attached to a camshaft.
  • the output element is arranged in a defined angular interval pivotally to the drive element.
  • the drive element, the output element and the side cover define a plurality of pressure chambers, which are divided by wings in opposing pressure chambers.
  • the pressure chambers form a hydraulic actuator, by means of which the phase angle between the driven element and the drive element can be variably adjusted.
  • the side covers are arranged on the axial side surfaces of the output element and the drive element and rotatably connected by screws with the drive element.
  • the device has a locking mechanism comprising a gate and a spring-loaded locking element.
  • the scenery is realized by means of a machining post-processing step in the form of a groove on a side surface of the solidly formed side cover.
  • the locking element is disposed axially displaceable within a receptacle which is formed within the driven element. Stand the backdrop and the locking element in the axial direction opposite, so the locking element can engage in the gate and mechanically couple the output member with the drive element.
  • To release the locking of the backdrop pressure medium is supplied, which pushes back the locking element into the receptacle.
  • One of the side covers is also solid in this embodiment, wherein a central circular area of the side cover is formed thick-walled, as its radial appearance. In the thick-walled area, radial grooves are introduced by means of machining post-processing steps, which communicate on the one hand with a pressure medium line and on the other hand with a group of pressure chambers.
  • the present invention has for its object to provide a reliable and inexpensive device.
  • the disc-shaped portion on the drive element facing away from the side surface has at least one bulge, which limits a recess on the driven element side facing the disc-shaped portion, wherein the recess of the shape of the bulge is adjusted and the pressure fluid guide within the Device serves.
  • the device has a drive element and an output element, wherein the drive element is driven by a crankshaft of the internal combustion engine and the output element drives a camshaft of the internal combustion engine.
  • the drive element can be in drive connection with the crankshaft, for example, by means of a traction mechanism or gear drive.
  • the output member may be rotatably connected to the camshaft, for example.
  • a hydraulic actuator with at least one pressure chamber is provided, by means of which the driven element can be pivoted in a defined angular range relative to the drive element. Consequently a phase relation between the output element and the drive element is variably adjustable.
  • a side cover is provided which is rotatably connected to one of these components.
  • the side cover on a disc-shaped portion optionally with a central opening, which seals, for example, the pressure chambers in the axial direction.
  • the side cover at the disc-shaped portion one or more protrusions are provided on the side facing away from the driven element side surface.
  • Each of the bulges defines on the side facing the driven element side of the disc-shaped portion a recess which is thus adapted to the shape of the bulge.
  • the depression serves to guide the pressure medium within the device.
  • the depression communicates with the pressure chamber.
  • at least one pressure medium line is provided, by means of the pressure medium to the device feedable or can be discharged from this, wherein the recess communicates with the pressure medium line.
  • the depression (s) may serve to supply pressure to or discharge fluid from the pressure chamber (s).
  • the radial bores in the driven element which serve to supply pressure medium to the pressure chambers and are to be produced by means of elaborate, machining post-processing steps, omitted.
  • the depressions may be formed on one of the side covers or on both side covers of the device. In the latter case, the costly drilling accounts completely, in the first case, only half of the holes are necessary.
  • the recess at least partially forms a link into which a locking element, which is received in a receptacle of the drive element or of the driven element, can engage, wherein the link communicates with a pressure medium line or a pressure chamber.
  • the recesses forming the depression increase the surface of the side cover and, on the other hand, generate air turbulence in the region of the side cover during operation of the internal combustion engine.
  • the cooling of the side cover improves, whereby its thermal load decreases.
  • the bulges cause an increase in the rigidity of the side cover, so that its deformation decreases during operation of the internal combustion engine and thus the leakage sinking in and out of the device.
  • the side cover can be made thin-walled and therefore weight-optimized with the same rigidity.
  • the disc-shaped portion is formed as a sheet metal part and the bulge and the recess by means of a chipless forming process, for example, a deep-drawing process is prepared.
  • a chipless forming process for example, a deep-drawing process is prepared.
  • it may be provided to produce the disk-shaped section by means of a metal or plastic injection molding method, a sintering method, by means of casting, forging or stamped packetizing.
  • the bulge-well pairs can be formed cost-neutral during the manufacture of the disc-shaped portion.
  • FIG. 1 schematically an internal combustion engine 1 is sketched, wherein a seated on a crankshaft 2 piston 3 is indicated in a cylinder 4.
  • the crankshaft 2 is in the illustrated embodiment via a respective traction drive 5 with an intake camshaft 6 and exhaust camshaft 7 in combination, wherein a first and a second device 11 for the variable adjustment of the timing of gas exchange valves 9, 10 for a relative rotation between the crankshaft 2 and the Camshafts 6, 7 can provide.
  • Cams 8 of the camshafts 6, 7 actuate one or more intake gas exchange valves 9 or one or more exhaust gas exchange valves 10.
  • FIGS. 2 and 3 show a device 11 according to the invention in the longitudinal or cross section.
  • the device 11 has a drive element 13, an output element 14 and two side covers 15, 16, which are arranged on axial side surfaces of the drive member 13 and secured by screws 12 thereto.
  • the output element 14 is designed in the form of an impeller and has a substantially cylindrically designed hub member 17, extending from the outer cylindrical surface area wings 18 in the radial direction outwards. Starting from an outer peripheral wall 19 of the drive element 13, projections 20 extend radially inwards.
  • the drive element 13 is mounted by means of radially inner circumferential walls of the projections 20 relative to the output element 14 rotatably mounted on this.
  • the drive element 13 is provided with a belt pulley 21, via which torque can be transmitted from the crankshaft 2 to the drive element 13 by means of a belt drive (not shown).
  • the output member 14 is rotatably connected by means of a central screw 22 with the camshaft 6, 7.
  • pressure chambers 23 are formed between each two circumferentially adjacent projections.
  • Each of the pressure spaces 23 is circumferentially bounded by adjacent projections 20, axially of the side covers 15, 16, radially inwardly of the hub member 17, and radially outward of the peripheral wall 19.
  • In each of the pressure chambers 23 protrudes a wing 18, wherein the wings 18 bear against both the side covers 15, 16, and on the peripheral wall 19.
  • Each wing 18 thus divides the respective pressure chamber 23 into two counteracting pressure chambers 24, 25th
  • the output element 14 is arranged rotatably in a defined Winkelbreich to the drive element 13. The angular range is limited in a direction of rotation of the output element 14 in that each of the vanes 18 abuts an early stop 26.
  • the angular range in the other direction of rotation is limited by the fact that each of the wings 18 comes to rest on a late stop 27.
  • pressurizing a group of pressure chambers 24, 25 and pressure relief of the other group the phase position of the drive element 13 to the output element 14 (and thus the phase angle of the camshaft 6, 7 to the crankshaft 2) can be varied.
  • pressurizing both groups of pressure chambers 24, 25, the phase position can be kept constant.
  • the camshaft 6, 7 has a central pressure medium line 28 and a plurality of axially parallel pressure medium lines 29, which extend in the axial direction.
  • the pressure medium lines 28, 29 communicate via annular grooves 30a, b, which are formed on an outer circumferential surface of the camshaft 6, 7, with a control valve, not shown.
  • the axially parallel pressure medium lines 29 communicate via radial bores 39 with a first group of pressure chambers 24.
  • the central pressure medium line 28 extends through the central screw 22 to the side of the output element 14 facing away from the camshaft 6, 7 and opens into a closed space 31, which is sealed by a plug 32.
  • the FIGS. 4 and 5 show a voltage applied to the drive member 13 side surface and a back of the first side cover 15.
  • the first side cover 15 has a disc-shaped portion 33 with a central opening 34 and consists of a steel sheet.
  • a plurality of recesses 35a-c are formed on the side surface facing away from the output element 14 ( FIG. 5 ).
  • a first protrusion 35a extends annularly around the central opening 34.
  • five second protrusions 35b are provided which are rib-shaped and extend radially outward from the first protrusion 35a.
  • a third bulge 35c adjoins the first bulge 35a in the area of one of the second bulges 35b and covers a portion of the disc-shaped section 33 between two of the second bulges 35b.
  • the bulges 35a-c By the bulges 35a-c, the surface of the first side cover 15 is increased, so that the cooling of the device 11 is improved.
  • the bulges 35a-c generate air turbulences in the region of the first side cover 15, thereby further improving its cooling. Overall, this leads to a lower thermal load on the first side cover 15 and to a more effective cooling of the pressure medium present in the device 11, usually engine oil of the internal combustion engine 1.
  • the protrusions 35a-c increase the rigidity of the first side cover 15, whereby the leakage decreases or the first side cover 15 can be made thinner walled.
  • corresponding recesses 36a-c are formed on the side surface of the disk-shaped section 33 facing the output element 14 (FIG. FIG. 4 ).
  • the first recess 36a is formed in the form of an annular channel and communicates with the central pressure medium line 28 via the space 31.
  • the second recesses 36b are in the form of radially extending grooves which open into the first recess 36a and are connected to a second group of Pressure chambers 25 communicate.
  • the pressure medium supply to or the pressure medium discharge from the second pressure chambers 25 thus takes place via the first and second recesses 36 a, b, which are formed on the disk-shaped portion 33 of the first side cover 15.
  • the otherwise usual radial bores within the output element 14, which must be introduced by means of machining Nachbearbeitungs Kunststoffe in a blank, can be omitted, whereby its manufacturing cost is significantly reduced.
  • the device 11 further comprises a locking mechanism, by means of which a releasable mechanical connection between the driven element 14 and the drive element 13 can be produced.
  • the driven element 14 has a receptacle 37, in which an axially displaceable locking element 38 is accommodated.
  • the locking element 38 is acted upon by means of a compression spring with a force in the direction of the disk-shaped portion 33.
  • the third recess 36 c is made with excess to the locking element 38 and receives a stop element 40.
  • the stop element 38 and the third recess 36c delimit a slide into which the locking element 38 can engage when it faces the slide in the axial direction.
  • the stop element 40 has two grooves 41, 42 on a side surface facing the first side cover 15.
  • the first groove 41 connects the first recess 36a with the second recess 36b, which adjoins the stop element 40, so that the pressure medium supply of this second recess 36b and thus of the corresponding pressure chamber 25 via the first groove.
  • the second groove 42 connects the first groove 41 with the third recess 36c and thus provides the pressure medium supply of the gate, for releasing the mechanical connection between the output element 13 and the drive element 14, safe.
  • the grooves 41, 42 may alternatively or additionally be formed in the third recess 36c in the region of the stop element 40.
  • the bulges 35a-c and the corresponding recesses 36a-c can be produced cost-neutral.

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

Claims (5)

  1. Dispositif (11) pour l'ajustement variable des temps de commande de soupapes à échange de gaz (9, 10) d'un moteur à combustion interne (1), comprenant :
    - un élément d'entraînement (13) qui peut être amené en liaison d'entraînement avec un vilebrequin (2) du moteur à combustion interne (1),
    - un élément de sortie (14) qui peut être amené en liaison d'entraînement avec un arbre à cames (6, 7) du moteur à combustion interne (1) et qui est disposé de manière pivotante par rapport à l'élément d'entraînement (13),
    - et au moins un couvercle latéral (15), qui est disposé sur une surface latérale axiale de l'élément de sortie (14) ou de l'élément d'entraînement (13) et qui est connecté de manière solidaire en rotation à l'élément d'entraînement (13) ou à l'élément de sortie (14) et présente une portion (33) en forme de disque,
    - au moins un espace de pression (23) étant prévu à l'intérieur du dispositif (11) et une position de phase entre l'élément d'entraînement (13) et l'élément de sortie (14) pouvant être ajustée de manière variable par apport de fluide sous pression à l'espace de pression (23) ou évacuation de fluide sous pression de celui-ci, caractérisé en ce que
    - la portion en forme de disque (33) présente, sur la surface latérale opposée à l'élément d'entraînement (13), au moins un renflement (35a-c) qui délimite un renfoncement (36a-c) sur le côté de la portion en forme de disque (33) tourné vers l'élément d'entraînement (13), le renfoncement (36a-c) étant adapté à la forme du renflement (35a-c) et servant au guidage de fluide sous pression à l'intérieur du dispositif (11).
  2. Dispositif (11) selon la revendication 1, caractérisé en ce que le renfoncement (36a-c) communique avec l'espace de pression (23).
  3. Dispositif (11) selon la revendication 1, caractérisé en ce qu'il est prévu au moins une conduite de fluide sous pression (28) au moyen de laquelle du fluide sous pression peut être acheminé au dispositif (11) ou évacué hors de celui-ci, le renfoncement (36a-c) communiquant avec la conduite de fluide sous pression (28).
  4. Dispositif (11) selon la revendication 1, caractérisé en ce que le renfoncement (36c) constitue au moins en partie une coulisse dans laquelle peut s'engager un élément de verrouillage (38) qui est reçu dans un logement (37) de l'élément d'entraînement (13) ou de l'élément de sortie (14), la coulisse communiquant avec une conduite de fluide sous pression (28) ou un espace de pression (23).
  5. Dispositif (11) selon la revendication 1, caractérisé en ce que la portion en forme de disque (33) est réalisée sous forme de pièce en tôle et le renflement (35a-c) et le renfoncement (36a-c) sont fabriqués au moyen d'un procédé de façonnage sans enlèvement de copeaux.
EP11151488A 2010-02-26 2011-01-20 Dispositif destiné au calage variable des soupapes d'un moteur à combustion interne Not-in-force EP2362074B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010009392A DE102010009392A1 (de) 2010-02-26 2010-02-26 Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP2362074A1 EP2362074A1 (fr) 2011-08-31
EP2362074B1 true EP2362074B1 (fr) 2013-03-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11151488A Not-in-force EP2362074B1 (fr) 2010-02-26 2011-01-20 Dispositif destiné au calage variable des soupapes d'un moteur à combustion interne

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EP (1) EP2362074B1 (fr)
DE (1) DE102010009392A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013210495B4 (de) * 2013-06-06 2020-06-18 Schaeffler Technologies AG & Co. KG Nockenwellenversteller
US9797277B2 (en) * 2015-02-20 2017-10-24 Schaeffler Technologies AG & Co. KG Camshaft phaser
DE102016217968A1 (de) 2016-09-20 2018-03-22 Schaeffler Technologies AG & Co. KG Zentrierende Verbindung eines Triggerrades mit einem Rotor in einem Nockenwellenversteller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808619A1 (de) * 1998-02-28 1999-09-02 Schaeffler Waelzlager Ohg Verriegelungseinrichtung für eine Vorrichtung zum Verändern der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine, insbesondere für eine Flügelzellen-Verstelleinrichtung
DE10038607B4 (de) 2000-08-08 2007-07-12 Schaeffler Kg Vorrichtung zum Verändern der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine, insbesondere hydraulische Nockenwellen-Verstelleinrichtung in Rotationskolbenbauart
DE102004026865A1 (de) 2004-06-02 2006-05-04 Ina-Schaeffler Kg Vorrichtung zur Veränderung der Steuerzeiten einer Brennkraftmaschine
US7305949B2 (en) * 2005-08-18 2007-12-11 Delphi Technologies, Inc. Stamped target wheel for a camshaft phaser

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Publication number Publication date
EP2362074A1 (fr) 2011-08-31
DE102010009392A1 (de) 2011-09-01

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