EP2676009B1 - Module d'actionnement pour au moins une soupape d'échange des gaz d'un moteur à combustion interne - Google Patents

Module d'actionnement pour au moins une soupape d'échange des gaz d'un moteur à combustion interne Download PDF

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Publication number
EP2676009B1
EP2676009B1 EP12708655.1A EP12708655A EP2676009B1 EP 2676009 B1 EP2676009 B1 EP 2676009B1 EP 12708655 A EP12708655 A EP 12708655A EP 2676009 B1 EP2676009 B1 EP 2676009B1
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EP
European Patent Office
Prior art keywords
bearing
camshaft
split
actuation module
cam
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.)
Active
Application number
EP12708655.1A
Other languages
German (de)
English (en)
Other versions
EP2676009A1 (fr
Inventor
Kai Hartel
Heino Schiller
Norman Wawrik
Hannes Dussenpond
Jens Kriete
Klaus Gebauer
Oswald Gehl
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP2676009A1 publication Critical patent/EP2676009A1/fr
Application granted granted Critical
Publication of EP2676009B1 publication Critical patent/EP2676009B1/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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01L2001/0476—Camshaft bearings
    • 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
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/101—Electromagnets

Definitions

  • the invention relates to an actuation module for at least one gas exchange valve of an internal combustion engine according to the preamble of patent claim 1 of the invention.
  • the invention further relates to a method for assembling an actuating module for at least one gas exchange valve of an internal combustion engine according to the preamble of patent claim 8.
  • a cylinder head for an internal combustion engine with at least one camshaft known.
  • the bearing which is furthest away from the drive wheel is also produced as a roller bearing, for example ball bearings.
  • the bearing bridges each have an opening which completely surrounds the camshaft.
  • the bearing bridges are undivided, wherein the bearing can have a roller bearing, for example a ball bearing, for mounting the camshaft.
  • the camshaft is cooled below a temperature of the cylinder head cover and fitted in the holes of the bearing bridges and in prefabricated cams. An assembly aid ensures correct alignment of the cams, in particular for the correct distance and the predetermined rotation of the same.
  • the cams are arranged between the undivided bearing bridges.
  • the DE 10 2006 005 333 A1 discloses a valve train which is installed in a cylinder head cover.
  • the valve train is intended to be used in an internal combustion engine and comprises a drive shaft with cams located thereon.
  • the drive shaft is held in bearings, which are largely guided in a sliding manner in the direction of a gas exchange valve longitudinal axis.
  • the bearings are divided into two parts, the individual parts are bolted together.
  • the invention has for its object to improve an actuating module and a method of the type mentioned above in that a simple and inexpensive installation is achieved and a variation of the cam lift is possible.
  • the cylinder head cover for supporting the camshaft has at least one split bearing bridge, which has a bearing base and a Has bearing cap, each forming a bearing opening with radially inner bearing surface, provided, and wherein at least one cam piece has a bearing element, which is arranged in one of the at least one split bearing bridge radially between the camshaft and the bearing surface.
  • a particularly simple manufacture and assembly is achieved in that at least one bearing element and a cam piece are integrally formed with each other.
  • the cylinder head cover has at least one undivided bearing point.
  • a reduction of frictional forces within an undivided bearing of the camshaft or toothed shaft is achieved in that a rolling bearing, in particular a ball bearing, is arranged in at least one undivided bearing point.
  • a particularly reliable and functionally reliable design of the actuating module is achieved in that the camshaft has a toothed drive shaft, wherein this is mounted in an undivided bearing point.
  • a valve switching system is achieved in that at least one cam piece is designed and arranged such that it is axially displaceable on the camshaft or toothed shaft.
  • a simple assembly is achieved by the fact that the bearing base is formed integrally with the cylinder head cover.
  • a correct position mounting of the cam pieces is achieved by aligning the cam pieces during or after step (a).
  • At least one bearing cap is mounted on a respective bearing base before or after step (b).
  • a low-friction bearing of the camshaft on at least one undivided bearing point is achieved in that before step (a) at least one roller bearing, in particular a ball bearing, is pressed onto at least one camshaft at a location after step (b) arranged in the undivided bearing area is.
  • a simple assembly of a built camshaft with at least one axially displaceable on the camshaft cam piece is achieved in that after step (a) and before Step (b) an actuating mechanism for a camshaft axially displaceable cam piece is mounted.
  • a fixed mounting of the cam pieces for axial insertion of the camshaft is achieved in that in step (a) the cam pieces are each inserted into a bearing base.
  • a special form of this built camshaft is achieved in that after step (b) at least one cam piece rotatably connected to the camshaft, in particular pinned, is.
  • an actuating module comprises a cylinder head cover 10 with split bearing bridges 12 and two camshafts 14, each having first and second cam pieces 16, 17.
  • the cylinder head cover 10 also has, for each of the camshafts 14 on both sides in each case an undivided bearing 18, wherein in one of two bearings 18 for a camshaft 14, a roller bearing 20, in particular ball bearings, is arranged.
  • the roller bearing 20 simultaneously provides an axial fixation of the cam or toothed shaft 14.
  • the first cam pieces 16 are rotationally fixed and axially fixedly arranged on the camshaft 14.
  • the second cam pieces 17 are rotatably connected to the camshaft 14, but additionally axially displaceable by a predetermined path relative to the camshaft, as indicated by double arrows 24, so that optionally different cam contours for actuation of a respective gas exchange valve (not shown) can be adjusted. In this way, a valve switching mechanism is available.
  • Corresponding switching devices 22 for axially displacing the second cam pieces 17 are arranged on the cylinder head cover 10.
  • Each cam piece 16, 17 integrally has a bearing element 26 and the cam pieces 16, 17 are arranged in the split bearing bridges 12, so that the cam pieces 16, 17 and their respective bearing element 26 between the respective bearing bridge 12 and the Camshaft 14 are arranged.
  • the bearing bridges 12 each comprise a bearing base 28, which is formed integrally with the cylinder head cover 10, and a bearing cap 30 (FIG. Fig. 2 ). In the presentation of Fig. 1 the bearing caps are not yet attached to the respective bearing bases 28, so that only the bearing bases 28 can be seen from the split bearing bridges 12.
  • a bearing base 28 and a bearing cap 30 form a bearing opening, through which a camshaft engages and which forms a bearing surface 32 facing the camshaft 14 ( Fig. 2 ).
  • the cam pieces 16, 17 and their bearing elements 26 are arranged in the respective bearing bridge 12 between the camshaft 14 and the bearing surface 32.
  • a housing of the cylinder head cover 10 may be formed undivided. In this way, the cylinder head cover 10 is easier to seal than a cylinder head cover 10 with a split housing, wherein the housing parts have the two complementary parts (base and cover) of the split bearing bridge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (15)

  1. Module d'actionnement pour au moins une soupape d'échange des gaz d'un moteur à combustion interne comprenant un couvercle de culasse (10) et au moins un arbre à cames (14), en particulier un arbre denté, comprenant au moins une came (16, 17) disposée sur l'arbre à cames (14),
    caractérisé en ce que le couvercle de culasse (10) comprend au moins une console de palier divisée (12) pour supporter l'arbre à cames (14), laquelle console de palier comprend une base de palier (28) et un chapeau de palier (30) qui forment respectivement une ouverture de palier présentant une surface de palier (32) située radialement à l'intérieur, et au moins une came (16, 17) comprenant un élément de palier (26), lequel est disposé radialement entre l'arbre à cames (14) et la surface de palier (32) dans l'une des au moins une console de palier divisée (12).
  2. Module d'actionnement selon la revendication 1, caractérisé en ce qu'au moins un élément de palier (26) et une came (16, 17) sont réalisés d'un seul tenant l'un avec l'autre.
  3. Module d'actionnement selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que le couvercle de culasse (10) comprend au moins un point de palier non divisé (18).
  4. Module d'actionnement selon la revendication 3, caractérisé en ce qu'un palier à roulement (20), en particulier un palier à billes, est disposé dans au moins un point de palier non divisé (18).
  5. Module d'actionnement selon la revendication 2 ou 3, caractérisé en ce que l'arbre à cames (14) comprend un arbre d'entraînement denté, celui-ci étant supporté dans un point de palier non divisé (18).
  6. Module d'actionnement selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une came (17) est réalisée et disposée de telle sorte que celle-ci soit axialement coulissante sur l'arbre à cames (14).
  7. Module d'actionnement selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la base de palier (28) est réalisée d'un seul tenant avec le couvercle de culasse (10).
  8. Procédé d'assemblage d'un module d'actionnement pour au moins une soupape d'échange de gaz d'un moteur à combustion interne, le module d'actionnement étant réalisé selon au moins l'une quelconque des revendications précédentes et comprenant au moins un point de palier non divisé (18), caractérisé par les étapes suivantes :
    (a) introduction d'au moins une ou de toutes les cames (16, 17) présentant des éléments de palier (26) dans un pont de palier divisé (12) respectif ;
    (b) insertion de l'arbre à cames (14) à travers les éléments de palier (26).
  9. Procédé selon la revendication 8, caractérisé en ce que les cames (16, 17) sont orientées pendant ou après l'étape (a).
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce qu'au moins un chapeau de palier (30) est fixé sur une base de palier (28) respective avant ou après l'étape (b).
  11. Procédé selon au moins l'une quelconque des revendications 8 à 10, caractérisé en ce qu'avant l'étape (a), au moins un palier à roulement (20), en particulier un palier à billes (20), est pressé sur au moins un arbre à cames (14) en un point qui est disposé après l'étape (b) dans la région du point de palier non divisé (18).
  12. Procédé selon la revendication 11, caractérisé en ce qu'après l'étape (b), le palier à roulement (20) est fixé dans le point de palier non divisé (18), en particulier pressé dans le point de palier non divisé (18).
  13. Procédé selon au moins l'une quelconque des revendications 8 à 12, caractérisé en ce qu'un mécanisme d'actionnement pour une came (17) axialement coulissante sur l'arbre à cames (14) est monté après l'étape (a) et avant l'étape (b).
  14. Procédé selon au moins l'une quelconque des revendications 8 à 13, caractérisé en ce que les cames (16, 17) sont respectivement introduites dans une base de palier (28) dans l'étape (a).
  15. Procédé selon au moins l'une quelconque des revendications 8 à 14, caractérisé en ce qu'après l'étape (b), au moins une came (16) est reliée de manière solidaire en rotation, en particulier goupillée, à l'arbre à cames (14).
EP12708655.1A 2011-02-19 2012-01-23 Module d'actionnement pour au moins une soupape d'échange des gaz d'un moteur à combustion interne Active EP2676009B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011011803A DE102011011803A1 (de) 2011-02-19 2011-02-19 Betätigungsmodul für mindestens ein Gaswechselventil einer Brennkraftmaschine
PCT/EP2012/000284 WO2012110191A1 (fr) 2011-02-19 2012-01-23 Module d'actionnement pour au moins une soupape d'échange des gaz d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2676009A1 EP2676009A1 (fr) 2013-12-25
EP2676009B1 true EP2676009B1 (fr) 2015-04-15

Family

ID=45833276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12708655.1A Active EP2676009B1 (fr) 2011-02-19 2012-01-23 Module d'actionnement pour au moins une soupape d'échange des gaz d'un moteur à combustion interne

Country Status (5)

Country Link
EP (1) EP2676009B1 (fr)
CN (1) CN103370501B (fr)
DE (1) DE102011011803A1 (fr)
RU (1) RU2540344C1 (fr)
WO (1) WO2012110191A1 (fr)

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DE102013010330B4 (de) 2013-06-20 2024-05-16 Volkswagen Aktiengesellschaft Nockenwelle und Verfahren zur Montage einer solchen Nockenwelle
DE102013212935B4 (de) 2013-07-03 2024-02-08 Schaeffler Technologies AG & Co. KG Aktuator-Nockenwellenversteller-System für einen trockenen Riementrieb
DE102014116207A1 (de) * 2014-11-06 2016-05-12 Thyssenkrupp Presta Teccenter Ag Verfahren zur Montage eines Nockenwellenmoduls
DE102015111776A1 (de) 2015-07-21 2017-01-26 Thyssenkrupp Presta Teccenter Ag Brennkraftmaschine sowie eine Nockenwelle für eine solche Brennkraftmaschine
DE102016215221B4 (de) * 2016-08-16 2020-10-22 Eto Magnetic Gmbh Zylinderkopfhaubenaufbau
DE102018101012A1 (de) * 2017-01-23 2018-07-26 Schaeffler Technologies AG & Co. KG Schiebenockenaktuator für ein Schiebenockensystem
CN108561231B (zh) * 2017-06-09 2020-09-04 长城汽车股份有限公司 连续可变气门升程机构的控制策略
CN108223047B (zh) * 2017-06-09 2020-01-31 长城汽车股份有限公司 配气机构、发动机和车辆

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JP4238874B2 (ja) * 2006-01-19 2009-03-18 トヨタ自動車株式会社 内燃機関のカムシャフト支持構造
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Also Published As

Publication number Publication date
CN103370501A (zh) 2013-10-23
WO2012110191A1 (fr) 2012-08-23
DE102011011803A1 (de) 2012-08-23
EP2676009A1 (fr) 2013-12-25
CN103370501B (zh) 2016-03-16
RU2540344C1 (ru) 2015-02-10

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