EP2565402B1 - Dispositif de réglage d'arbres à came - Google Patents

Dispositif de réglage d'arbres à came Download PDF

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Publication number
EP2565402B1
EP2565402B1 EP12168785.9A EP12168785A EP2565402B1 EP 2565402 B1 EP2565402 B1 EP 2565402B1 EP 12168785 A EP12168785 A EP 12168785A EP 2565402 B1 EP2565402 B1 EP 2565402B1
Authority
EP
European Patent Office
Prior art keywords
spring
spacer element
camshaft adjuster
spring cover
spacer
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
EP12168785.9A
Other languages
German (de)
English (en)
Other versions
EP2565402A1 (fr
Inventor
Sven Weisser
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
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2565402A1 publication Critical patent/EP2565402A1/fr
Application granted granted Critical
Publication of EP2565402B1 publication Critical patent/EP2565402B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—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
    • F01L2001/34483—Phaser return springs
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/02—Camshaft drives characterised by their transmission means the camshaft being driven by chains
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/04—Camshaft drives characterised by their transmission means the camshaft being driven by belts
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/06—Camshaft drives characterised by their transmission means the camshaft being driven by gear wheels

Definitions

  • the invention relates to a camshaft adjuster.
  • Camshaft adjusters are used in internal combustion engines for varying the timing of the combustion chamber valves in order to make the phase relation between crankshaft and camshaft in a defined angular range, between a maximum early and a maximum late position, variable. Adjusting the timing to the current load and speed reduces fuel consumption and emissions.
  • camshaft adjuster are integrated into a drive train, via which a 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 output element and the drive element form one or more pairs of mutually acting pressure chambers, which can be acted upon by oil pressure.
  • Drive element and output element are arranged coaxially. By filling and emptying individual pressure chambers, a relative movement between the drive element and output element is generated.
  • the rotationally acting on between the drive element and the output element spring urges the drive element relative to the output element in an advantageous direction. This advantage direction can be the same or opposite to the direction of rotation.
  • a common type of hydraulic phaser is the vane phaser.
  • Vane adjusters comprise a stator, a rotor and a drive element. The rotor is usually rotatably connected to the camshaft and forms the output element.
  • stator and the drive element are also rotatably connected to each other and are possibly also integrally formed.
  • the rotor is coaxial to the stator and inside the stator.
  • the vane cell adjusters have various sealing lids. Stator, drive element and sealing cover are secured by several screw connections.
  • a displacement element is axially displaced via oil pressure, which generates a helical gear teeth relative rotation between a drive element and an output element.
  • camshaft adjuster Another design of a camshaft adjuster is the electromechanical camshaft adjuster having a three-shaft gear (for example, a planetary gear). One of the shafts forms the drive element and a second shaft forms the output element. About the third wave, the system by means of an adjusting device, such as an electric motor or a brake, rotational energy supplied or removed from the system. In this case, a spring can likewise be arranged such that the drive element and the driven element assist or guide back their relative rotation.
  • an adjusting device such as an electric motor or a brake
  • the DE 10 2006 002 993 A1 discloses a camshaft adjuster, wherein the spring element is arranged on the camshaft-facing side of the camshaft adjuster.
  • the spring element is covered by a spring cover. The cover secures the spring element in the axial direction and protects against external influences.
  • the DE 10 2008 051 755 A1 discloses a phaser having a spring element with one end of the spring element mounted on a pin which is bolted to a disk.
  • a cup-shaped spring lid encapsulates the spring element with this disc and protects against external influences.
  • the object of the invention is to provide a camshaft adjuster, which has a low-friction and reliable spring safety.
  • the reduction of the axial play of the spring is effected by a spacer element of the spring cover in the region of the spring end of the spring.
  • there remains enough axial space for the windings of the spring which have a deviation from their ideal extent in the radial direction during operation of the camshaft adjuster and due to manufacturing tolerances.
  • a collision of the windings of the spring is avoided with a peripheral member, which increases the life of the spring and the friction is reduced during operation.
  • the invention provides the advantage that manufacturing tolerances with respect to the radial extension direction of the turns can be coarser and thus more economical. This advantage of coarse tolerance can also be achieved in the peripheral components, e.g. at the spring cover.
  • the spacer element is formed as a local collection in one piece with the spring cover.
  • a survey can be produced by embossing, deep drawing or milling.
  • a local education is advantageous so that targeted the areas of the spring are secured in the axial direction of the spring cover, which are subject to a minimum relative movement between the spring and a peripheral component during operation. This minimizes friction and wear and increases the life of the spring.
  • the spacer element is formed separately from the spring cover.
  • the component separation between the spring cover and the spacer element as an insert advantageously allows the targeted use of materials for certain functions.
  • the spring cover may be made of a material that specifically withstands environmental influences and the spacer element made of a wear-resistant and / or higher quality material.
  • the spring cover with the spacer element material form and / or non-positively connected.
  • a cohesive connection is provided, alternatively also in combination with a positive or non-positive connection, wherein the spacer element is embedded in the spring cover, glued, welded or soldered.
  • Positive and non-positive connections equally position the spacer reliably with the spring cover at the designated function point of the axial abutment of the spring end with the spacer element.
  • the spring cover is formed of sheet metal or plastic.
  • Forming a spring cover made of sheet metal in a thin-walled pot shape is advantageous because of the low weight and the nevertheless high rigidity.
  • a design of the spring cover made of plastic is preferably used when the economy is given to sheet metal and no high temperature differences in operation at the location of the spring cover are to be expected or the thermal shock resistance of the plastic is sufficiently given.
  • the spacer element has a coating.
  • a coating reduces the wear and the weight in the formation of the spacer element as a basic carrier with an economical material, e.g. Plastic.
  • a plurality of distributed in the circumferential direction spacer elements are provided.
  • a distribution of several spacer elements is advantageous if the load of a single spacer element is too high and this would lead to failure.
  • the distribution in the circumferential direction is preferably to be arranged outside the resilient windings. Distributed in the circumferential direction spacers may be arranged on different pitch circles and / or in different angular positions.
  • the spacer element is arranged in the region of the bearing of the spring end. A fixation of the spring ends in the axial direction on the bearing avoids compulsion in the axial direction in the region of the resilient turns.
  • the spacer extends around the storage.
  • This transfer can be partial or complete.
  • the storage is usually given by a pin or other cylindrical element.
  • the Umragung also star-shaped, be designed with the storage as a center.
  • the Umragung has an exemption in the form of the cross section of the storage, so that longer trained bearing pin can partially protrude into the spring cover. A protrusion of the spring cover by the bearing pin is conceivable.
  • the inventive arrangement of the spacer element, the friction between the spring and the spring cover, or other peripheral components is avoided. This reduces wear and increases service life.
  • the resilient in operation turns of the spring have enough axial space to avoid contact with peripheral components.
  • the bearing surface of the spring ends of the spring remains on the bearing obtained at the same time, or can be advantageously increased by the invention.
  • Fig. 1 shows a section of a camshaft adjuster 1.
  • the camshaft adjuster 1 has a drive element 2, an output element 3, a spring 4 and a spring cover 5 on.
  • the drive element 2 and the output element 3 are arranged rotatable relative to each other.
  • the relative rotation in the circumferential direction 10 of the camshaft adjuster 1 can be done, for example, by filling pressure chambers with hydraulic fluid, wherein the pressure chambers between the drive element 2 and output element 3 are formed.
  • the spring 4 braces the drive element 2 and driven element 3 relative to each other in a circumferential direction 10.
  • the bias provides for a relative rotation between the drive element 2 and driven element 3. So that the spring 4 is protected from external influences, this is at least partially covered by a spring cover 5 or encapsulated. Further ensures the operation of the spring cover 5, the spring 4 in the axial direction 8 and prevents slippage of their spring ends 7 of the bearing 11.
  • the spring 4 is formed as a spiral spring whose resilient turns extend predominantly perpen
  • the drive element 2 has in one piece or separately a not shown toothing for a timing chain or a belt.
  • the output element 3 is rotatably connected to a camshaft, not shown.
  • the spring cover 5 has a spacer element 6 which is in contact with the spring end 7 of the spring 4.
  • the spacer element 6 is formed integrally with the spring cover 5 and rises in the axial direction 8 from the end face 12 of the spring cover 5 out.
  • the bearing 11 is designed as a bearing journal 13 of a screw 14 of the camshaft adjuster 1.
  • the outer diameter of the lateral surface 15 of the bearing journal 13 is constant in the axial direction 8.
  • the spacer element 6 has a material recess 16, wherein a lateral surface 17 of the material recess 16 is larger than the diameter of the lateral surface 15 of the bearing journal 13.
  • the spacer element 6 and its material recess 16 may be formed circumferentially 10 of the camshaft adjuster 1 partially or completely circumferentially.
  • Fig. 2 shows a first embodiment of a spacer element 6.
  • the spacer element 6 is formed as a circular disk-shaped, local elevation 9 of the spring cover 5. This local survey 9 is largely aligned with the storage 11 oriented. The local elevation 9 minimizes the contact with the spring end 7 to the area around the bearing 11.
  • Fig. 3 shows a second embodiment of a spacer element 6.
  • the spacer element 6 is formed as a pattern of a plurality of individual elevations 19.
  • the individual elevations 19 are arranged in a star shape around an imaginary axial extension of the lateral surface 15 of the bearing journal 13. The distribution of the individual elevations 19 are largely evenly spaced from each other.
  • Fig. 4 shows a third embodiment of a spacer element 6.
  • the spacer element 6 is formed as a pattern of a plurality of individual elevations 19.
  • the individual elevations 19 are oriented to each other rectified. A distance between the individual elevations 19 leaves room for an imaginary extension of the lateral surface 15 of the bearing journal thirteenth
  • Fig. 5 shows a section of a spring cover 5 with a spacer element 6.
  • the spacer element 6 is formed integrally from the spring cover 5.
  • the spring cover 5 and the spacer element 6 have largely the same wall thickness.
  • the spacer element 6 has a material recess 16 with a lateral surface 17, which extends over the entire wall thickness. This space can be penetrated by a storage 11.
  • An offset A of the spacer element 6 from the spring cover 5 in the axial direction 8 limits the axial spring space 20.

Claims (8)

  1. Dispositif de réglage d'arbre à cames (1), comprenant
    - un élément d'entraînement (2), un élément de sortie (3), un ressort (4) et un couvercle de ressort (5),
    - l'élément d'entraînement (2) et l'élément de sortie (3) étant disposés de manière à pouvoir tourner l'un par rapport à l'autre,
    - le ressort (4) serrant l'élément d'entraînement (2) et l'élément de sortie (3) dans la direction périphérique (10),
    - le couvercle de ressort (5) étant relié à l'élément d'entraînement (2) ou à l'élément de sortie (3) et
    - le couvercle de ressort (5) recouvrant le ressort (4) dans la direction axiale (8),
    caractérisé en ce que
    le couvercle de ressort (5) comprend un élément d'écartement (6) et l'élément d'écartement (6) limite un degré de liberté du ressort (4) dans la direction axiale (8), par le fait que l'élément d'écartement (6) peut être amené en contact avec une extrémité (7) du ressort (4), l'élément d'écartement (6) étant disposé dans la région du support (11) de l'extrémité de ressort (7), de telle sorte qu'une mise en contact des composants périphériques avec les spires élastiques du ressort (4) dans la direction axiale (8) soit évitée, l'élément d'écartement (6) étant réalisé d'un seul tenant avec le couvercle de ressort (5), en tant que bossage local (9).
  2. Dispositif de réglage d'arbre à cames (1) selon la revendication 1, caractérisé en ce que l'élément d'écartement (6) et le couvercle de ressort (5) sont réalisés séparément.
  3. Dispositif de réglage d'arbre à cames (1) selon la revendication 2, caractérisé en ce que le couvercle de ressort (5) est relié à l'élément d'écartement (6) par liaison de matière, par engagement par complémentarité de forme et/ou par force.
  4. Dispositif de réglage d'arbre à cames (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le couvercle de ressort (5) est réalisé en tôle ou en plastique.
  5. Dispositif de réglage d'arbre à cames (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'écartement (6) comprend un revêtement.
  6. Dispositif de réglage d'arbre à cames (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que plusieurs éléments d'écartement (6) distribués dans la direction périphérique (10) du couvercle de ressort (5) sont prévus.
  7. Dispositif de réglage d'arbre à cames (1) selon la revendication 1, caractérisé en ce que l'élément d'écartement (6) fait saillie autour du support (11).
  8. Couvercle de ressort (5) d'un dispositif de réglage d'arbre à cames (1) selon l'une quelconque des revendications 1 à 8.
EP12168785.9A 2011-09-01 2012-05-22 Dispositif de réglage d'arbres à came Not-in-force EP2565402B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011081971A DE102011081971A1 (de) 2011-09-01 2011-09-01 Nockenwellenversteller

Publications (2)

Publication Number Publication Date
EP2565402A1 EP2565402A1 (fr) 2013-03-06
EP2565402B1 true EP2565402B1 (fr) 2014-07-16

Family

ID=46168167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12168785.9A Not-in-force EP2565402B1 (fr) 2011-09-01 2012-05-22 Dispositif de réglage d'arbres à came

Country Status (4)

Country Link
US (1) US8863707B2 (fr)
EP (1) EP2565402B1 (fr)
CN (1) CN102966392B (fr)
DE (1) DE102011081971A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013206672A1 (de) * 2013-04-15 2014-10-16 Schaeffler Technologies Gmbh & Co. Kg Nockenwellenversteller
EP3106632B1 (fr) * 2014-02-14 2019-10-30 Aisin Seiki Kabushiki Kaisha Dispositif de commande de réglage de distribution
US9334763B1 (en) * 2014-11-21 2016-05-10 Schaeffler Technologies AG & Co. KG Support pin for spring guidance in a camshaft phaser
WO2020061739A1 (fr) 2018-09-25 2020-04-02 舍弗勒技术股份两合公司 Élément d'insertion pour déphaseur d'arbre à cames et déphaseur d'arbre à cames
DE102019113643B4 (de) * 2019-05-22 2021-04-22 Pierburg Gmbh Ventilvorrichtung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006002993A1 (de) 2006-01-21 2007-08-09 Schaeffler Kg Nockenwellenversteller für eine Brennkraftmaschine
DE102007039282B4 (de) * 2007-08-20 2017-06-01 Hilite Germany Gmbh Hydraulisch dichter Nockenwellenversteller
DE102009005114A1 (de) * 2008-01-30 2009-08-06 Schaeffler Kg Nockenwellenverstellvorrichtung
DE102009042168A1 (de) * 2008-10-14 2010-04-15 Schaeffler Kg Nockenwellenversteller und Abtriebsadapter für eine konzentrische Nockenwelle
DE102008051732A1 (de) * 2008-10-15 2010-04-22 Schaeffler Kg Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine
DE102008051755A1 (de) 2008-10-15 2010-04-22 Schaeffler Kg Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine
JP4725655B2 (ja) * 2009-02-09 2011-07-13 株式会社デンソー バルブタイミング調整装置
DE102009015882A1 (de) * 2009-04-01 2010-10-07 Schaeffler Technologies Gmbh & Co. Kg Nockenwellenversteller und Verfahren zur Verstellung der Drehwinkellage einer Nockenwelle relativ zu einer Kurbelwelle
US8424500B2 (en) * 2009-08-06 2013-04-23 Delphi Technologies, Inc. Harmonic drive camshaft phaser with improved radial stability
DE102010009394A1 (de) * 2010-02-26 2011-09-01 Schaeffler Technologies Gmbh & Co. Kg Vorrichtung zur varibalen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine
DE102011088295A1 (de) * 2011-12-12 2013-06-13 Schaeffler Technologies AG & Co. KG Nockenwellenversteller

Also Published As

Publication number Publication date
CN102966392A (zh) 2013-03-13
EP2565402A1 (fr) 2013-03-06
US8863707B2 (en) 2014-10-21
CN102966392B (zh) 2016-12-21
DE102011081971A1 (de) 2013-03-07
US20130055978A1 (en) 2013-03-07

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