EP2582928A1 - Aktorvorrichtung zur verstellung eines schiebenockensystems - Google Patents
Aktorvorrichtung zur verstellung eines schiebenockensystemsInfo
- Publication number
- EP2582928A1 EP2582928A1 EP11715538.2A EP11715538A EP2582928A1 EP 2582928 A1 EP2582928 A1 EP 2582928A1 EP 11715538 A EP11715538 A EP 11715538A EP 2582928 A1 EP2582928 A1 EP 2582928A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engagement pin
- sliding cam
- housing
- actuator device
- permanent
- 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
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
- F01L1/053—Camshafts overhead type
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
- H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/031—Electromagnets
Definitions
- Actuator device of a push cam system having at least one push cam and an engagement pin protruding from a housing, the housing being disposed on a component of a cylinder head or on the cylinder head of an internal combustion engine, and the engagement pin being contactable with at least one groove of the push cam system at least one ejection ramp, and wherein the engagement pin within the housing has a permanent holding magnet and is subsequently dominated by a fixed coil element magnetizable by an electrical coil and the engagement pin is spring-loaded in the direction of the shift cam.
- Such a generic actuator is known from DE-102 40 774 A1.
- an activation of the engagement pin takes place by energizing the coil, whereby a magnetic field is generated which is opposite to the field of the permanent holding magnet and displaces it.
- the displacement of the field causes a reduced holding force between permanent magnet and spool core, so in that the magnetic field generated by the coil and the force of the spring acting on the engagement pin causes the engagement pin to extend so that it engages in the groove of the sliding cam system and causes displacement of the sliding cam as desired.
- the backward movement of the engagement pin into its inner end position is initiated by the ejection ramp, which is to move the engagement pin against the force of the spring so far and with such acceleration of the sliding cam that the engagement pin with energized the coil by the permanent magnet and its magnetic field on the spool core is held.
- the object of the invention is therefore to improve an actuator with the features described above so that larger tolerances can be absorbed and also a desired lower distance of the engagement pins can be ensured each other.
- the object of the invention is achieved in that at least in the sliding cam end region facing the engagement pin, an actuating device is installed, which is effective in the region of the outlet of the ejection ramp to the high circle and generates an additional force on the engagement pin in the direction of the housing.
- the actuating device generates an additional force to the force introduced by the ejection ramp, by means of which the engagement pin reliably reaches the inner end position.
- the dimensions of the built-in housing parts, in particular the permanent holding magnet on the engagement pin can be kept smaller, so that a small distance of the engagement pins to each other can be realized.
- the engagement pin has at its end facing the sliding cam an opening in which an actuating member is slidably disposed, which is loaded in the direction of the sliding cam by means of a return spring.
- the position and the paths of the actuator and the force of the spring is so dimensioned that it is compressed, in particular in the area of the ejection ramp, but extended at the end of the ejection ramp and supported on this, so that the return spring of the actuator such a force generated on the engagement pin, that this overcomes the residual stroke and safely reaches its inner end position.
- the actuating member is formed on the engagement pin as a ball which is installed in a bore of the engagement pin with the associated spring and that the bore is narrowed at its end to a secure hold of the ball against falling out sure.
- the constriction can be done by caulking the edge of the hole.
- the engagement pin at its end facing the sliding cam and the ejection ramp in the region of its outlet to the high circle each have a permanent magnet and a permanent magnet and that these permanent magnets are installed with oppositely directed polarity facing each other.
- This embodiment of the invention ensures that the repulsive magnetic forces of the permanent magnet and the permanent magnet in the end region of the ejection ramp generate such a force that the engagement pin overcomes the resulting even at unfavorable tolerance residual stroke and moves securely in its inner end position.
- the permanent holding magnet is surrounded on the engagement pin within the housing by a retaining cap or a retaining plate which is fastened to the engagement pin in order to fix the permanent retaining magnet securely on the engagement pin.
- Fig. 1 a section through a sliding cam and an associated
- FIG. 2 u. 3 sections corresponding to FIG. 1, in which different installation tolerances are illustrated,
- Fig. 4 u. 5 shows sections with different tolerance layers corresponding to FIGS. 2 and 3 in a modified embodiment of the invention
- Fig. 6 u. 7 sections through actuators, which are combined to form a unit, wherein the engagement pins are close together.
- a camshaft of a reciprocating internal combustion engine is referred to, as far as shown in detail, on the rotatably but slidably sliding cam 2 is arranged, which has at least one groove 3 in addition to the cam for the gas exchange valves, which includes an ejection 4 ,
- the ejection ramp 4 extends to a designated 18 high circle of the sliding cam 2 in the region of the groove 3.
- a generally designated 5 actuator is provided which has a housing 6, a coil 7 with a spool core 8 and an engagement pin 9 ,
- the engagement pin 9 is arranged radially movable within the housing 6 with respect to the groove 3 and has a spring 10 inside, which biases the engagement pin 9 in the direction of the sliding cam 2.
- the engagement pin 9 further has at its the sliding cam 2 end facing a bore 13 in which a return spring 14 is installed, which loads a ball 15 in the direction of the sliding cam 2.
- the ball 15 stands so far that it is pressed at least in the region of the ejection ramp 4 against the force of the return spring 14 in the bore 13, so that the return spring stores force that relaxes at the end of the ejector ramp and accelerates the engagement pin 9 so strong in that it arrives safely in the inner end position.
- FIGS. 6 and 7 the housing 6 is widened, so that two engagement pins 9 each can be installed close to one another and even a distance of only 5 mm can be achieved.
- the ends of the engagement pins 9 are formed according to the previously described embodiments of the invention and equipped with permanent magnets 16 or balls 15.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010024030A DE102010024030A1 (de) | 2010-06-16 | 2010-06-16 | Aktorvorrichtung zur Verstellung eines Schiebenockensystems |
PCT/EP2011/056295 WO2011157466A1 (de) | 2010-06-16 | 2011-04-20 | Aktorvorrichtung zur verstellung eines schiebenockensystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2582928A1 true EP2582928A1 (de) | 2013-04-24 |
EP2582928B1 EP2582928B1 (de) | 2016-03-23 |
Family
ID=44487186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11715538.2A Not-in-force EP2582928B1 (de) | 2010-06-16 | 2011-04-20 | Aktorvorrichtung zur verstellung eines schiebenockensystems |
Country Status (4)
Country | Link |
---|---|
US (1) | US8616167B2 (de) |
EP (1) | EP2582928B1 (de) |
DE (1) | DE102010024030A1 (de) |
WO (1) | WO2011157466A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011086233B4 (de) * | 2011-11-14 | 2015-11-26 | Schaeffler Technologies AG & Co. KG | Aktorvorrichtung zur Verstellung eines Schiebenockensystems mit Schaltscheibe |
DE102012103796A1 (de) * | 2012-04-30 | 2013-10-31 | Eto Magnetic Gmbh | Elektromagnetische Stellvorrichtung |
DE102012207476B4 (de) * | 2012-05-07 | 2014-08-28 | Schaeffler Technologies Gmbh & Co. Kg | Aktoreinheit eines Schiebenockensystems mit einer Rasteinrichtung |
JP6225710B2 (ja) * | 2013-11-28 | 2017-11-08 | 株式会社デンソー | 電磁アクチュエータ |
DE102015113970A1 (de) * | 2014-09-11 | 2016-03-17 | Hilite Germany Gmbh | Elektromagnetische Stellvorrichtung |
DE102015105337A1 (de) * | 2015-04-08 | 2016-10-13 | Kendrion (Villingen) Gmbh | Elektromagnetischer Aktuator mit klemmfreien Stößeln |
JP2017005123A (ja) * | 2015-06-11 | 2017-01-05 | いすゞ自動車株式会社 | 電磁アクチュエータ |
DE102019203429A1 (de) * | 2019-03-13 | 2020-09-17 | Mahle International Gmbh | Kulissenführung |
DE102020129626B4 (de) | 2020-11-10 | 2022-05-19 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ventiltrieb für eine Verbrennungskraftmaschine und Verbrennungskraftmaschine |
KR102551883B1 (ko) * | 2021-08-27 | 2023-07-04 | 서울대학교산학협력단 | 쌍안정 소프트 전자기 액추에이터 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5806478A (en) | 1995-02-14 | 1998-09-15 | Oberg; Gordon D. | Valve actuator push rod having internal lash take-up spring and oil pump assembly |
DE20114466U1 (de) | 2001-09-01 | 2002-01-03 | Eto Magnetic Kg | Elektromagnetische Stellvorrichtung |
DE102007010419B4 (de) | 2007-03-01 | 2011-04-28 | Erwin Müller GmbH | Leuchtspiegel |
DE102007010149A1 (de) * | 2007-03-02 | 2008-09-04 | Audi Ag | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit verschiebbarem Nockenträger und Doppelschneckentrieb |
DE102007028600B4 (de) * | 2007-06-19 | 2011-06-22 | ETO MAGNETIC GmbH, 78333 | Elektromagnetische Stellvorrichtung |
DE102007052252A1 (de) | 2007-11-02 | 2009-05-07 | Daimler Ag | Betätigungsvorrichtung |
DE102007054978B4 (de) * | 2007-11-17 | 2023-12-14 | Mercedes-Benz Group AG | Ventiltriebvorrichtung |
DE102008024086A1 (de) | 2008-05-17 | 2009-11-19 | Daimler Ag | Ventiltriebvorrichtung |
DE102008060169B4 (de) * | 2008-11-27 | 2023-02-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine |
DE102008060167B4 (de) | 2008-11-27 | 2021-05-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ventiltrieb einer Brennkraftmaschine |
DE102009008422A1 (de) | 2009-02-11 | 2010-08-12 | Daimler Ag | Ventiltriebumschaltvorrichtung |
-
2010
- 2010-06-16 DE DE102010024030A patent/DE102010024030A1/de not_active Withdrawn
-
2011
- 2011-04-20 WO PCT/EP2011/056295 patent/WO2011157466A1/de active Application Filing
- 2011-04-20 US US13/701,900 patent/US8616167B2/en not_active Expired - Fee Related
- 2011-04-20 EP EP11715538.2A patent/EP2582928B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2011157466A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102010024030A1 (de) | 2011-12-22 |
WO2011157466A1 (de) | 2011-12-22 |
EP2582928B1 (de) | 2016-03-23 |
US20130098318A1 (en) | 2013-04-25 |
US8616167B2 (en) | 2013-12-31 |
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