EP2582928A1 - Dispositif actionneur destiné au réglage d'un système de came coulissante - Google Patents

Dispositif actionneur destiné au réglage d'un système de came coulissante

Info

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
Application number
EP11715538.2A
Other languages
German (de)
English (en)
Other versions
EP2582928B1 (fr
Inventor
Andreas Nendel
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 EP2582928A1 publication Critical patent/EP2582928A1/fr
Application granted granted Critical
Publication of EP2582928B1 publication Critical patent/EP2582928B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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

L'invention concerne un dispositif actionneur d'un système de came coulissante, comportant au moins une came coulissante (2) et une tige de contact (9) faisant saillie hors d'un boîtier (6), le boîtier (6) pouvant être fixé à un élément d'une culasse ou à la culasse d'un moteur à combustion interne, et la tige de contact (9) pouvant être mise en contact avec au moins une rainure (3) du système de came coulissante qui comporte au moins une rampe d'éjection (4). La tige de contact (9) comporte, dans le boîtier (6), un aimant permanent de maintien (11) et est ensuite contrôlée par un noyau de bobine (9) fixe pouvant être magnétisé par une bobine électrique (7) et la tige de contact (9) est sollicitée par un ressort en direction de la came coulissante (2). Un dispositif d'actionnement est monté au moins sur la zone d'extrémité de la tige de contact (9) tournée vers la came coulissante (2), ledit dispositif d'actionnement opérant dans la zone de sortie de la rampe d'éjection (4) vers le cercle supérieur (18) et générant une force supplémentaire sur la tige de contact (9) en direction du boîtier (6).
EP11715538.2A 2010-06-16 2011-04-20 Actionneur pour déplacer une ensemble de cames Not-in-force EP2582928B1 (fr)

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 (fr) 2010-06-16 2011-04-20 Dispositif actionneur destiné au réglage d'un système de came coulissante

Publications (2)

Publication Number Publication Date
EP2582928A1 true EP2582928A1 (fr) 2013-04-24
EP2582928B1 EP2582928B1 (fr) 2016-03-23

Family

ID=44487186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11715538.2A Not-in-force EP2582928B1 (fr) 2010-06-16 2011-04-20 Actionneur pour déplacer une ensemble de cames

Country Status (4)

Country Link
US (1) US8616167B2 (fr)
EP (1) EP2582928B1 (fr)
DE (1) DE102010024030A1 (fr)
WO (1) WO2011157466A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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
RU2578929C1 (ru) * 2015-02-02 2016-03-27 Дмитрий Юрьевич Байков Устройство привода клапана двигателя внутреннего сгорания
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)

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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

Non-Patent Citations (1)

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Title
See references of WO2011157466A1 *

Also Published As

Publication number Publication date
US20130098318A1 (en) 2013-04-25
WO2011157466A1 (fr) 2011-12-22
DE102010024030A1 (de) 2011-12-22
EP2582928B1 (fr) 2016-03-23
US8616167B2 (en) 2013-12-31

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