EP2578819B1 - Unité d'actionnement pour systèmes à came coulissante avec broche actionneuse régie par pointeau - Google Patents

Unité d'actionnement pour systèmes à came coulissante avec broche actionneuse régie par pointeau Download PDF

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Publication number
EP2578819B1
EP2578819B1 EP12181618.5A EP12181618A EP2578819B1 EP 2578819 B1 EP2578819 B1 EP 2578819B1 EP 12181618 A EP12181618 A EP 12181618A EP 2578819 B1 EP2578819 B1 EP 2578819B1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
control
reciprocating
spring
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
EP12181618.5A
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German (de)
English (en)
Other versions
EP2578819A1 (fr
Inventor
Ronny GÜNNEL
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
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Schaeffler Technologies AG and Co KG
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Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2578819A1 publication Critical patent/EP2578819A1/fr
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Publication of EP2578819B1 publication Critical patent/EP2578819B1/fr
Not-in-force legal-status Critical Current
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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
    • 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

Definitions

  • Such actuator for reciprocating internal combustion engines is from the WO 2010/097298 A1 known.
  • the permanent magnets operatively connected to the solenoid unit are secured to the inner ends of the control needles.
  • At the control pins engage spring, which load the control pins together with permanent magnets in the direction of clamping body and clamp them to set the Aktorstatte in its inner position, whereas the solenoid unit attracts the permanent magnets and thus the control pins against the force of the springs and thus the clamping body Esthat shown in that the actuator pins are not locked quickly when being pushed in by the ejection ramp or, for example, caused by vibrations of the reciprocating internal combustion engine, are released in the latching device and contact the displacement grooves or the circumferential region adjacent to the displacement grooves.
  • the unwanted loosening of the lock can also occur when the actuator pin passes over edges on the high circle of the displacement cam unit. If the actuator pin slides in the direction of the cam contour of the sliding cam unit, it is reset when the ejection ramp is passed over, ie the sunken actuator pin is pushed back to the level of the high-revving cam unit. In this case, the control needle immediately after pushing up the Aktorstattes again ensure the locking of the locking device, which is only the case when caused by the spring force of the control needle acceleration is high enough to cause the lock fast enough, but not always the case.
  • the spring on the actuator pin In order to be able to extend the actuator pin sufficiently fast, even at low temperatures and low viscosity of the engine oil, the spring on the actuator pin must be made sufficiently strong. As a result, the acceleration caused by the spring on the actuator pins, especially in the case of a warm reciprocating internal combustion engine, is high, so that a false lock is enhanced by the control needles.
  • the object of the invention is therefore to improve an actuator for reciprocating internal combustion engines so that the disadvantages described above are avoided. It should be ensured that the control needles react quickly enough even in the border areas and track the lock fast enough to clamp the Aktorstatte. This should be done with simple and inexpensive means.
  • the object of the invention is achieved in that the defined by spring force per moving mass acceleration of the control needles are matched by their feathers of the acceleration of the actuator pins by the spring force associated therewith substantially.
  • the reduction of the mass takes place by decoupling the permanent magnet from the control needle.
  • the mass of the control needle unit to be moved by the spring is now considerably lower, so that the acceleration considerably can be increased.
  • the spring now only needs the actual control needle without the mass of the permanent magnet in the direction of locking device to accelerate, so that a considerably faster locking takes place, which is all operating conditions.
  • a spring plate is fixed, which forms a stop for the permanent magnet, so that this, moved by the solenoid unit, the control pin can release from the lock.
  • the spring plate continues to serve as a support for the respective spring of the control needle, which is supported on a component adjacent to the electromagnet unit.
  • the spring plate may be caulked with the end of the shaft of the control pin. But it is also possible that the spring plate has a shaft in which an inwardly projecting groove is incorporated, which corresponds to a groove on the shaft of the control needle, so that the spring plate can be advanced with the flange on the end of the shaft and there engages in the groove.
  • a steel disc with radial and axial play can be arranged, which is installed between the permanent magnet and a shoulder at the end of the shaft of the control needle.
  • 1 denotes a control needle, which has a cylindrical bearing portion 2, a control tip 3 and a shaft 4.
  • the shaft 4 has a reduced diameter, which adjoins the storage area 2 by means of a shoulder 5.
  • a designated 6 spring plate is attached, which has a flange 7 which is engaged by means of a groove in a groove of the shaft 4 of the control needle 1 and thereby fixed.
  • a permanent magnet 8 and a steel plate 9 is arranged on the shaft 4, which only partially fill the axial space of the shaft between disc spring 6 and paragraph 5 and continue to be arranged with radial play on the shaft 4, so that a complete decoupling of the formed as a disc permanent magnet 8 and the steel plate 9 against the control needle 1 is present.
  • the guide elements 17 have bearings in which the storage area 2 of the control needles 1 radially fixed, but is guided axially movable.
  • the spring plate 6 of the control needles 1 is connected to a spring 18 in operative connection, which is designed as a compression spring and further supported on a component 19, to which, not shown, the electromagnet unit connects, so that the component 19 is preferably not carried out magnetically.
  • the solenoid unit To release the clamping body 15 and thus unlocking the actuator pins 12, the solenoid unit, not shown, is energized so that it attracts the permanent magnets 8 and the steel discs 9 and thus raises the control needles 1 with spring plate 6 against the force of the spring 18.
  • the decoupling of the permanent magnets 8 and the steel discs 9 according to the invention also unlocking the control needles 1 has become faster, since the solenoid initially only the permanent magnets 8 and the steel discs 9 must move, then, accelerated, faster and safer move the control needles 1 and the springs 18 can compress.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (9)

  1. Machine motrice à piston alternatif, comprenant au moins une culasse, dont les canaux d'entrée et de sortie sont commandés par au moins une soupape d'échange de gaz respective réalisée sous forme de soupape d'entrée et de soupape de sortie, qui peuvent être actionnées par des cames d'au moins un arbre à cames et par des éléments de transfert entraînés par celles-ci, les cames étant réalisées sous forme de cames coulissantes avec au moins une came par unité de came coulissante, lesquelles sont disposées de manière solidaire en rotation mais déplaçable axialement sur un arbre de base entraîné, guidé de manière fixée au moteur à combustion interne, et comprenant au moins une unité d'actionneur (10) fixée au moteur à combustion interne pour chaque unité de came coulissante, avec au moins une goupille d'actionneur (12) pour le déplacement des unités de cames coulissantes dans différentes positions axiales au moyen d'au moins deux rainures de coulissement coopérant avec les goupilles d'actionneur (12) sur la périphérie des unités de cames coulissantes, lesquelles sont réalisées sous forme hélicoïdale, sont disposées avec une symétrique spéculaire les unes par rapport aux autres et présentent au moins une rampe d'éjection pour les goupilles d'actionneur (12), les goupilles d'actionneur (12) étant sollicitées par ressort dans la direction de l'unité de came coulissante et pouvant être fixées dans leur position rentrée, éloignée de l'unité de came coulissante, au moyen de dispositifs d'encliquetage verrouillables, et les verrouillages présentant des aiguilles de commande (1) sollicitées par ressort et correspondant à des corps de serrage (15) des dispositifs d'encliquetage, lesquelles aiguilles de commande peuvent être libérées au moyen d'une unité d'électroaimant et d'aimants permanents (8) en liaison fonctionnelle avec les aiguilles de commande (1), caractérisée en ce que l'accélération des aiguilles de commande (1) par leurs ressorts (18), définie par la force de ressort par masse déplacée, est essentiellement ajustée à l'accélération des goupilles d'actionneur (12) par les ressorts de pression (16) qui leur sont associés.
  2. Machine motrice à piston alternatif selon la revendication 1, caractérisée en ce que la masse déplacée de l'unité d'aiguilles de commande est réduite en conséquence en vue de l'ajustement de l'accélération.
  3. Machine motrice à piston alternatif selon la revendication 2, caractérisée en ce que la réduction de la masse est réalisée par découplage de l'aimant permanent (8) de l'aiguille de commande (1).
  4. Machine motrice à piston alternatif selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'aiguille de commande (1) présente, au niveau de sa région d'extrémité tournée vers l'aimant permanent (8), une tige (4) sur laquelle est disposé l'aimant permanent (8) avec un jeu radial.
  5. Machine motrice à piston alternatif selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une coupelle de ressort (6) est fixée à l'extrémité de la tige (4), laquelle coupelle de ressort est en liaison avec le ressort (18) de l'aiguille de commande (1).
  6. Machine motrice à piston alternatif selon la revendication 5, caractérisée en ce que la coupelle de ressort (6) est matée avec l'extrémité de la tige (4).
  7. Machine motrice à piston alternatif selon la revendication 5, caractérisée en ce qu'une gorge est pratiquée dans la coupelle de ressort (6), laquelle vient en contact avec une rainure sur la tige (4) de l'aiguille de commande (1).
  8. Machine motrice à piston alternatif selon l'une quelconque des revendications précédentes, caractérisée en ce que l'aimant permanent (8) présente un jeu axial entre la coupelle de ressort (6) et un épaulement (5) de l'aiguille de commande (1).
  9. Machine motrice à piston alternatif selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une rondelle en acier (9) avec un jeu radial et axial est disposée en plus de l'aimant permanent (8) sur la tige (4) de l'aiguille de commande (1).
EP12181618.5A 2011-10-05 2012-08-24 Unité d'actionnement pour systèmes à came coulissante avec broche actionneuse régie par pointeau Not-in-force EP2578819B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110084039 DE102011084039A1 (de) 2011-10-05 2011-10-05 Aktoreinheit für Schiebenockensysteme mit durch Steuernadeln beherrschte Aktorstifte

Publications (2)

Publication Number Publication Date
EP2578819A1 EP2578819A1 (fr) 2013-04-10
EP2578819B1 true EP2578819B1 (fr) 2013-11-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12181618.5A Not-in-force EP2578819B1 (fr) 2011-10-05 2012-08-24 Unité d'actionnement pour systèmes à came coulissante avec broche actionneuse régie par pointeau

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US (1) US8851035B2 (fr)
EP (1) EP2578819B1 (fr)
DE (1) DE102011084039A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011003760B4 (de) * 2010-11-29 2022-03-24 Schaeffler Technologies AG & Co. KG Elektromagnetische Stellvorrichtung
DE102011086233B4 (de) * 2011-11-14 2015-11-26 Schaeffler Technologies AG & Co. KG Aktorvorrichtung zur Verstellung eines Schiebenockensystems mit Schaltscheibe
DE102013201308A1 (de) * 2013-01-28 2014-07-31 Schaeffler Technologies Gmbh & Co. Kg Aktoreinheit mit Klemmaktorstiften
DE102013202130A1 (de) * 2013-02-08 2014-08-14 Schaeffler Technologies Gmbh & Co. Kg Schiebenockenaktor mit abgestimmten beweglichen Massen und spielbehafteter Verbindung dieser beweglichen Bauteile
EP3016117B1 (fr) * 2014-10-31 2017-12-06 Husco Automotive Holdings LLC Appareil d'actionneur de broche-poussoir
DE102017114575A1 (de) * 2017-06-29 2019-01-03 Man Truck & Bus Ag Variabler Ventiltrieb

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6425359B2 (en) * 2000-06-23 2002-07-30 Honda Giken Kogyo Kabushiki Kaisha Valve moving apparatus of an internal combustion engine
DE20114466U1 (de) * 2001-09-01 2002-01-03 Eto Magnetic Kg Elektromagnetische Stellvorrichtung
DE102007024598A1 (de) * 2007-05-25 2008-11-27 Schaeffler Kg Stellvorrichtung
DE102008020892A1 (de) * 2008-04-25 2009-10-29 Schaeffler Kg Stellvorrichtung
DE102008020893A1 (de) * 2008-04-25 2009-10-29 Schaeffler Kg Elektromagnetische Stellvorrichtung
DE102008060166A1 (de) * 2008-11-27 2010-06-02 Dr.Ing.H.C.F.Porsche Aktiengesellschaft Ventiltrieb für Gaswechselventile einer Brennkraftmaschine
DE202009015466U1 (de) 2009-02-27 2010-03-18 Schaeffler Kg Elektromagnetische Stellvorrichtung
DE102011078154A1 (de) * 2011-06-28 2013-01-03 Schaeffler Technologies AG & Co. KG Aktoreinheit mit zwei Aktorstiften für Schiebenockensysteme
US9183976B2 (en) * 2012-03-19 2015-11-10 Hanchett Entry Systems, Inc. Springless electromagnet actuator having a mode selectable magnetic armature

Also Published As

Publication number Publication date
DE102011084039A1 (de) 2013-04-11
US8851035B2 (en) 2014-10-07
US20130087113A1 (en) 2013-04-11
EP2578819A1 (fr) 2013-04-10

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