EP2676009A1 - Activation module for at least one gas exchange valve of an internal combustion engine - Google Patents
Activation module for at least one gas exchange valve of an internal combustion engineInfo
- Publication number
- EP2676009A1 EP2676009A1 EP12708655.1A EP12708655A EP2676009A1 EP 2676009 A1 EP2676009 A1 EP 2676009A1 EP 12708655 A EP12708655 A EP 12708655A EP 2676009 A1 EP2676009 A1 EP 2676009A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- camshaft
- undivided
- cylinder head
- actuation module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 9
- 230000004913 activation Effects 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims description 14
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- Actuation module for at least one gas exchange valve of an internal combustion engine
- the invention relates to an actuation module for at least one gas exchange valve
- Camshaft has at least one split bearing bridge having a bearing base and a bearing cap, each forming a bearing opening with radially inner bearing surface, according to the preamble of claim 1.
- 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 claim 8.
- a cylinder head for an internal combustion engine with at least one camshaft is known.
- s bearings, such as ball bearings, formed and the other bearings are made as plain bearings.
- 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.
- Camshaft 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 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.
- This object is achieved by an actuation module of the type mentioned above with the features characterized in claim 1 and by a method of the type mentioned above in claim 8 method steps.
- Advantageous embodiments of the invention are described in the further claims.
- At least one cam piece has a bearing element, which is arranged in a 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 in such a way that it is axially displaceable on the cam or toothed shaft.
- Cylinder head cover is formed.
- 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 at least one undivided bearing point is achieved in that before step (a) at least one rolling bearing, in particular a
- Ball bearing is pressed onto at least one camshaft at a position which is arranged after step (b) in the region of the undivided bearing point.
- 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.
- Fig. 1 shows an exemplary embodiment of an actuating module according to the invention in a perspective view
- Fig. 2 is a sectional view of the actuating module of FIG. 1 in a plane intersecting a camshaft.
- a preferred embodiment of an actuating module according to the invention comprises a cylinder head cover 10 with split bearing bridges 12 and two cam shafts 14, each having first and second cam pieces 16, 17.
- 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 bearing points 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.
- 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 or their respective bearing element 26 are respectively arranged between the respective bearing bridge 12 and the camshaft 14 ,
- the bearing bridges 12 each include a bearing base 28 integrally formed with the cylinder head cover 10 and a bearing cap 30 (FIG. 2).
- 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 shared 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 in the respective
- Bearing bridge 12 between the camshaft 14 and the bearing surface 32 is arranged.
- 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 split housing, wherein the housing parts the two
- the cam pieces 16, 17 are inserted into the Lagerbaeh 28 of the split bearing bridges 12 such that the bearing elements 26 of the cam pieces 16, 17 at the respective of the Bearing base 28 formed bearing surface 32 abut.
- the cam pieces 16, 17 are then aligned in the correct position.
- a rolling bearing for example ball bearings, in particular a deep groove ball bearing, is pressed onto the not yet mounted cam shafts or tooth shafts 14 at a position which lies after the assembly of the camshaft 14 in a respective bearing lane of the cylinder head cover 10 in the area of the undivided bearing 18.
- Actuators for the axially displaceable second cam pieces 17 are preassembled.
- Actuating devices include, for example, spring and ball, which latch when inserting the camshaft 14. Subsequently, the camshaft 14 through the undivided
- Cam pieces 16 rotationally fixed and axially fixed to the camshaft 14 are connected.
- a hood module with conventional camshaft and a hood module with a switchable valve train which realizes a shutdown of the valves of 2 cylinders, are provided for an otherwise structurally unchanged engine. Both variants can be realized without changing the base engine. In previously known constructions for this are two
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011011803A DE102011011803A1 (en) | 2011-02-19 | 2011-02-19 | Actuation module for at least one gas exchange valve of an internal combustion engine |
PCT/EP2012/000284 WO2012110191A1 (en) | 2011-02-19 | 2012-01-23 | Activation module for at least one gas exchange valve of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2676009A1 true EP2676009A1 (en) | 2013-12-25 |
EP2676009B1 EP2676009B1 (en) | 2015-04-15 |
Family
ID=45833276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12708655.1A Active EP2676009B1 (en) | 2011-02-19 | 2012-01-23 | Activation module for at least one gas exchange valve of an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2676009B1 (en) |
CN (1) | CN103370501B (en) |
DE (1) | DE102011011803A1 (en) |
RU (1) | RU2540344C1 (en) |
WO (1) | WO2012110191A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013010330B4 (en) | 2013-06-20 | 2024-05-16 | Volkswagen Aktiengesellschaft | Camshaft and method for assembling such a camshaft |
DE102013212935B4 (en) | 2013-07-03 | 2024-02-08 | Schaeffler Technologies AG & Co. KG | Actuator camshaft adjuster system for a dry belt drive |
DE102014116207A1 (en) | 2014-11-06 | 2016-05-12 | Thyssenkrupp Presta Teccenter Ag | Method for assembling a camshaft module |
DE102015111776A1 (en) | 2015-07-21 | 2017-01-26 | Thyssenkrupp Presta Teccenter Ag | Internal combustion engine and a camshaft for such an internal combustion engine |
DE102016215221B4 (en) * | 2016-08-16 | 2020-10-22 | Eto Magnetic Gmbh | Cylinder head cover assembly |
DE102018101012A1 (en) * | 2017-01-23 | 2018-07-26 | Schaeffler Technologies AG & Co. KG | Sliding cam actuator for a sliding cam system |
CN108561231B (en) * | 2017-06-09 | 2020-09-04 | 长城汽车股份有限公司 | Control strategy for continuously variable valve lift mechanism |
CN108223047B (en) * | 2017-06-09 | 2020-01-31 | 长城汽车股份有限公司 | Valve mechanism, engine and vehicle |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717534A1 (en) * | 1987-05-25 | 1988-12-15 | Emitec Emissionstechnologie | HOLLOW SHAFT WITH DRIVING ELEMENTS FASTENED BY THE SAME WITH AXIAL DIFFERENT MATERIAL PROPERTIES |
DE19807675A1 (en) | 1998-02-25 | 1999-08-26 | Schaeffler Waelzlager Ohg | Cylinder head for IC engine with camshaft |
DE102004011586A1 (en) * | 2003-03-21 | 2004-10-07 | Audi Ag | Valve gear for internal combustion engine has facility whereby in first and second axial positions of cam carrier first and second stop faces fixed on cam carrier bear against respective first and second stop faces fixed on cylinder head |
CN100378298C (en) * | 2003-03-21 | 2008-04-02 | 奥迪股份公司 | Valve drive of an internal combustion engine comprising a cylinder head |
DE10331089A1 (en) | 2003-07-09 | 2005-02-24 | Volkswagen Ag | Cylinder head cover for IC engines with one camshaft has bearing bridge with aperture to completely enclose the camshaft |
DE102004021376A1 (en) * | 2004-04-30 | 2005-12-08 | Audi Ag | Valve train for internal combustion engine, has sliding surface forming radial bearing and formed in bearing block, and radially rotating nut connected with lubricant e.g. oil, supply of internal combustion engine |
DE102004037198A1 (en) * | 2004-07-30 | 2006-03-23 | Ina-Schaeffler Kg | Valve gear of an internal combustion engine |
JP4238874B2 (en) * | 2006-01-19 | 2009-03-18 | トヨタ自動車株式会社 | Camshaft support structure for internal combustion engine |
DE102006005333B4 (en) * | 2006-02-07 | 2021-12-16 | Bayerische Motoren Werke Aktiengesellschaft | Valve drive for an internal combustion engine |
DE102006059188A1 (en) * | 2006-12-15 | 2008-06-19 | Schaeffler Kg | Actuator for positioning an actuator of a variable valve train of an internal combustion engine |
JP2008157062A (en) * | 2006-12-21 | 2008-07-10 | Otics Corp | Supporting structure for camshaft, method for mounting camshaft and method for manufacturing camshaft |
DE102007037358B4 (en) * | 2007-08-08 | 2022-04-14 | Daimler Ag | engine switching device |
DE102007051739A1 (en) * | 2007-10-30 | 2009-05-07 | Schaeffler Kg | Valve gear of an internal combustion engine |
JP5145953B2 (en) * | 2008-01-10 | 2013-02-20 | 株式会社ジェイテクト | Camshaft device |
DE102009014517B4 (en) * | 2009-03-23 | 2020-01-09 | Audi Ag | Valve train for gas exchange valves of an internal combustion engine with a displaceable camshaft sensor wheel |
DE102009049464A1 (en) * | 2009-10-15 | 2011-04-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Cylinder head cover for piston engine of motor vehicle, has radial bearing devices formed as bearing cases for bearing camshafts that are provided with multi-stage sliding cams, where bearing devices comprise bearing ring bodies |
-
2011
- 2011-02-19 DE DE102011011803A patent/DE102011011803A1/en not_active Withdrawn
-
2012
- 2012-01-23 WO PCT/EP2012/000284 patent/WO2012110191A1/en active Application Filing
- 2012-01-23 RU RU2013142631/06A patent/RU2540344C1/en active
- 2012-01-23 CN CN201280009503.4A patent/CN103370501B/en active Active
- 2012-01-23 EP EP12708655.1A patent/EP2676009B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012110191A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012110191A1 (en) | 2012-08-23 |
RU2540344C1 (en) | 2015-02-10 |
EP2676009B1 (en) | 2015-04-15 |
CN103370501A (en) | 2013-10-23 |
CN103370501B (en) | 2016-03-16 |
DE102011011803A1 (en) | 2012-08-23 |
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Inventor name: KRIETE, JENS Inventor name: SCHILLER, HEINO Inventor name: DUSSENPOND, HANNES Inventor name: GEHL, OSWALD Inventor name: HARTEL, KAI Inventor name: WAWRIK, NORMAN Inventor name: GEBAUER, KLAUS |
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