EP1552117B1 - Dispositif electromagnetique d'actionnement de soupape a position neutre reglable - Google Patents

Dispositif electromagnetique d'actionnement de soupape a position neutre reglable Download PDF

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Publication number
EP1552117B1
EP1552117B1 EP03750561A EP03750561A EP1552117B1 EP 1552117 B1 EP1552117 B1 EP 1552117B1 EP 03750561 A EP03750561 A EP 03750561A EP 03750561 A EP03750561 A EP 03750561A EP 1552117 B1 EP1552117 B1 EP 1552117B1
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EP
European Patent Office
Prior art keywords
valve
actuator
neutral position
backing plate
drive device
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.)
Expired - Lifetime
Application number
EP03750561A
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German (de)
English (en)
Other versions
EP1552117A1 (fr
Inventor
Johannes Meyer
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1552117A1 publication Critical patent/EP1552117A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • F01L2820/01—Absolute values

Definitions

  • the present invention relates to an electromagnetic valve drive device according to the preamble of claim 1.
  • An electromagnetic valve drive device is further from the DE 694 09 485 T2 in whose entirety the reference is made in the present application.
  • the valve drive device described there has an actuator or an "anchor” with an “anchor plate".
  • the actuator with the armature plate is slidably disposed and provided for actuating a valve of an internal combustion engine, ie, an intake valve or an exhaust valve.
  • the armature plate is arranged between two electromagnets spaced apart in the displacement direction.
  • One electromagnet is arranged on the valve-near side of the anchor plate and the other on the valve-remote side of the anchor plate.
  • two compression springs are provided, wherein the one compression spring is also disposed on the valve near side and the other compression spring on the valve remote side of the anchor plate.
  • the compression springs push the actuator or the anchor plate in a neutral position. In the neutral position, the spring forces cancel each other straight.
  • the actuator or the armature plate can be deflected counter to the spring forces.
  • the valve connected to the actuator By deflecting the actuator, the valve connected to the actuator can be opened or closed.
  • the valve In the neutral position of the actuator, the valve is in a "middle position", in it is partially open.
  • a hexagon socket screw is provided, which presses against the valve remote end of the valve distal compression spring.
  • the object of the invention is to provide an electromagnetic valve drive device which is optimized in terms of energy requirements.
  • the invention is based on an electromagnetic valve drive device with an axially displaceable actuator for opening or closing a valve.
  • the actuator has an anchor plate. Further, two successively arranged in the direction of displacement and spaced apart electromagnets are provided, wherein the one electromagnet is disposed on the valve near side of the armature plate and the other electromagnet on the valve remote side of the armature plate. Two successively arranged in the direction of displacement springs, one on the valve near side of the armature plate and the other on the far side of the armature plate push the actuator or the armature plate in a neutral position when the electromagnets are de-energized. By energizing the electromagnet, the actuator or the armature plate can be deflected from the neutral position. At one end of one of the two springs a stop element is provided. By Adjusting the stop element, the bias of the springs and thus the position of the neutral position of the actuator can be changed with respect to the electromagnet.
  • the essence of the invention consists in the fact that the stop element is arranged displaceably in the direction of displacement of the actuator and that an actuating device is provided which allows a displacement of the stop element during operation of the valve drive device. During operation of the engine so an adjustment of the neutral position of the actuator is possible.
  • the neutral position of the actuator or the armature plate can thus be changed. That is, the neutral position, in which cancel the forces of the two springs, can be moved in the direction of the solenoid close to the valve or in the direction of the electromagnet remote from the valve.
  • the valve is an inlet valve or an outlet valve, it makes sense, depending on the load condition of the internal combustion engine, to change the neutral position of the actuator during operation for energetic reasons.
  • the exhaust valve When the exhaust valve, it makes sense to bring the actuator or the armature plate in a neutral position at the start of the engine or in low load operation, which corresponds to the center position between the two electromagnets. In this neutral position, the anchor plate is equidistant from both electromagnets, unless they are energized. In load operation, however, it is energetically advantageous if the neutral position of the actuator is moved towards the solenoid close to the valve. This is possible by operating the actuating element. By actuating the actuating element, the abutting stop element at a spring end can be displaced in the direction of displacement of the actuator. By moving the stop element, the bias of the two springs and thus the position of the neutral position can be changed.
  • the actuator or the armature plate is not in the middle position between the two electromagnets after engine start or idle and in partial load operation, but for far away from the electromagnet.
  • the actuator By operating the actuator can be moved in load operation, the actuator so that its neutral position corresponds to the center position between the two electromagnets.
  • a hydraulic actuator is provided.
  • the actuating device has a pivoting lever with a short and a long lever arm.
  • the short lever arm cooperates with the stop element of the actuator.
  • the long lever arm is acted upon by a hydraulic cylinder with an adjustment.
  • the hydraulic cylinder can be connected via a lockable solenoid valve with the engine oil circuit. In load operation of the internal combustion engine, the engine oil pressure is sufficiently large, so that when the solenoid valve is open, the swivel arm can be actuated to adjust the neutral position.
  • the one end of the upper or remote from the valve spring by means of the pivot lever is shifted by twice the amount of the desired neutral position adjustment in the direction of displacement.
  • an adjusting screw can be provided on the short lever arm of the pivot lever.
  • the adjusting screw can be screwed directly into the short lever arm and against the stop element Press the valve remote spring.
  • the adjusting screw is secured by a screw lock against rotation, for example by a lock nut.
  • Such an actuator may be associated with a single valve.
  • such an actuating device may be provided for adjusting the actuators of two or more valves.
  • the hydraulic piston associated with the intake valves and the exhaust valves can each be connected to each other by a common oil line and connected via a simple solenoid valve to the engine oil circuit.
  • the actuator allows a "two-point adjustment". That is, the actuator is switchable between exactly two neutral positions. In this case, no sensors are required to detect the neutral position.
  • a continuous neutral position adjustment can also be provided. That is, not only upper and lower neutral positions can be set, but also any intermediate neutral positions.
  • FIG. 1 shows an actuator 1 of an electromagnetic valve drive device for an internal combustion engine.
  • the actuator 1 is provided for actuating two valves, for example two exhaust valves or two intake valves.
  • the valves are not shown in the illustration shown.
  • an actuator is assigned to each valve, which by an anchor rod 2 (see. FIGS. 2, 3 ) and an anchor plate 3 ( FIG. 4 ) is formed.
  • an anchor rod 2 see. FIGS. 2, 3
  • an anchor plate 3 FIG. 4
  • a valve spring is provided in each case, wherein in the FIGS. 1 to 3 in each case only an upper valve spring is shown, which can also be referred to as valve-distal valve spring 4, 5.
  • valve springs press the anchor rod 2 with its armature plate 3 in a neutral position. In the neutral position, the forces of the opposing upper and lower valve springs cancel out. In the neutral position of the anchor rod or the anchor plate which cooperates with the anchor rod valve is partially open, eg half open. For complete opening or closing of the valves, one valve-near and one valve-remote electromagnet is provided per valve.
  • valve-remote electromagnet 6 arranged above the armature plate is shown.
  • valve near solenoid 7 is shown.
  • the two electromagnets 6, 7 are spaced apart in the direction of displacement of the anchor rod 2 and the anchor plate 3.
  • the remote valve electromagnet 6 is energized. That is, the anchor plate 3 is attracted to the valve remote solenoid and connected to the anchor rod 2 valve is closed.
  • a stop element 8 is attached to the valve distal end of the anchor rod 2, which is provided for supporting the upper valve spring 4, 5. Furthermore, a further stop element 9 is provided.
  • the remote valve Valve spring 4 is thus clamped between the two stop elements 8, 9.
  • the upper stop element 9 is acted upon by a pivot lever 10 or 10 '.
  • the pivoting lever 10 or 10 ' has a short lever arm 11 or 11' and a long lever arm 12 or 12 '.
  • an adjusting screw 13 or 13' screwed which presses directly against the upper stop element 9 and 9 '.
  • pivot levers 10 are each about a dashed lines pivot axis 14, 14 'pivotally, the pivot lever 10, 10' in the short lever arm 11, 11 'and in the long lever arm 12, 12' divided.
  • the two long lever arms 12, 12 ' acted upon by a common piston 15 acted upon hydraulically.
  • the piston 15 can be connected via a lockable solenoid valve to the engine oil circuit.
  • FIG. 2 shows the deactivated state.
  • the piston 15 is not subjected to engine oil pressure.
  • FIG. 3 shows a state in which the hydraulic piston 15 is displaced upward by engine oil pressure. Accordingly, the pivot lever 10 is pivoted counterclockwise. Over the short lever arm 11 of the pivot lever 10, the upper stop element 9 is pressed down. As a result, the valve-distal spring 4 and the associated valve near spring 5 is compressed. That is, the two springs are biased further. In addition, thereby the anchor rod 2 and the anchor plate 3 in the direction of the valve near solenoid (see. FIG. 4 ) postponed. By pressing the piston 15 so the neutral position of the anchor rod 2 and the anchor plate 3 within the gap 16 (see. FIG. 4 ), which is provided between the valve remote electromagnet 6 and the valve-near electromagnet 7, to be changed.
  • each valve or more precisely each valve stem or each anchor plate, may also be provided with a separate actuator, i. be associated with a separate piston 15.

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

Abstract

L'invention concerne un dispositif électromagnétique d'actionnement de soupape pour un moteur à combustion interne, qui comprend un actionneur à déplacement axial servant à ouvrir ou fermer une soupape et présentant un plateau d'induit. Ce dispositif comporte également deux électroaimants espacés l'un de l'autre et placés l'un dernière l'autre dans le sens de déplacement ainsi que deux ressorts placés l'un derrière l'autre dans le sens de déplacement, un des ressorts étant placé sur le côté du plateau d'induit situé à proximité de la soupape et l'autre sur le côté du plateau d'induit éloigné de la soupape. De plus, ledit actionneur peut être dévié de sa position neutre par l'alimentation en courant des électroaimants. Un élément de réglage, reposant contre l'extrémité du premier des deux ressorts éloignée du plateau d'induit, permet de modifier la précontrainte des ressorts et l'emplacement de la position neutre dudit actionneur. Cet élément de réglage est monté de façon à pouvoir se déplacer dans le sens de déplacement et un dispositif d'actionnement permet un réglage de la position neutre pendant le fonctionnement du dispositif d'actionnement de soupape.

Claims (12)

  1. Dispositif d'entraînement électromagnétique de soupape d'un moteur à combustion interne comportant :
    - un organe d'actionnement (2, 3) coulissant axialement pour ouvrir et fermer une soupape, l'organe d'actionnement (2, 3) ayant une plaque d'induit (3),
    - deux électroaimants (6, 7) installés de manière écartés l'un derrière l'autre dans la direction de coulissement, l'un des électroaimants (7) étant situé du côté de la plaque d'induit (3) proche de la soupape et l'autre électroaimant (6) étant situé du côté de la plaque d'induit (3) éloigné de la soupape,
    - deux ressorts (4) l'un derrière l'autre dans la direction de coulissement, l'un des ressorts étant sur le côté de la plaque d'induit (3) proche de la soupape et l'autre sur le côté de la plaque d'induit (3) éloigné de la soupape, et
    - les organes d'actionnement (2, 3) sont tenus en position neutre lorsque les électroaimants (6, 7) sont coupés du courant et l'organe d'actionnement (2, 3) peut être sortie de sa position neutre par l'alimentation des électroaimants (6, 7),
    - un élément de réglage (9) contre lequel s'appuie l'extrémité de l'un des deux ressorts (4), du côté éloigné de la plaque d'induit, et
    par réglage de l'élément de réglage (9, 10) on modifie la précontrainte des ressorts et la position neutre de l'organe d'actionnement (2, 3),
    l'élément de réglage (9) étant monté coulissant dans la direction de coulissement et une installation d'actionnement (10, 15) est prévue qui permet le coulissement de l'élément de réglage (9) pendant le fonctionnement du dispositif d'entraînement de soupape et permet ainsi le réglage de la position neutre,
    caractérisé en ce que
    l'installation d'actionnement comporte un levier pivotant (10) ayant un bras de levier court (11) et un bras de levier long (12),
    le bras de levier court (11) coopérant avec l'élément d'actionnement (9) et le bras de levier long (12) étant sollicité par une force de réglage exercée par un piston hydraulique.
  2. Dispositif d'entraînement électromagnétique de soupape selon la revendication 1, selon lequel la soupape est coulissée par l'organe d'actionnement (2, 3) de sa position neutre dans une position d'ouverture et dans une position de fermeture.
  3. Dispositif d'entraînement électromagnétique de soupape selon la revendication 1 ou 2, selon lequel la plaque d'induit (3) est chaque fois écartée de façon équidistante des deux électroaimants (6, 7) en position neutre de l'organe d'actionnement (2, 3), lorsque l'installation d'actionnement (10, 15) n'est pas commandée.
  4. Dispositif d'entraînement électromagnétique de soupape selon la revendication 3, dans lequel la soupape est une soupape d'échappement.
  5. Dispositif d'entraînement électromagnétique de soupape selon l'une des revendications 1 à 4, selon lequel par l'actionnement de l'installation d'actionnement (10, 15) on coulisse l'organe d'actionnement (2, 3) dans une autre position neutre dans laquelle la distance entre la plaque d'induit (3) et l'électroaimant (7) proche de la soupape est inférieure à la distance de la plaque d'induit (3) et de l'électroaimant (6) éloigné de la soupape.
  6. Dispositif d'entraînement électromagnétique de soupape selon la revendication 1 ou 2, selon lequel la plaque d'induit (3) est écartée différemment des deux électroaimants (6, 7) lorsque l'organe d'actionnement (2, 3) est en position neutre, et que l'installation d'actionnement (10, 15) n'est pas commandée.
  7. Dispositif d'entraînement électromagnétique de soupape selon la revendication 6, selon lequel l'organe d'actionnement (2, 3) est coulissé dans une autre position neutre par la commande de l'installation d'actionnement (10, 15), position dans laquelle la plaque d'induit (3) est équidistante des deux électroaimants.
  8. Dispositif d'entraînement électromagnétique de soupape selon la revendication 6, selon lequel en position neutre de l'organe d'actionnement (2, 3), la distance entre la plaque d'induit et l'électroaimant (7) proche de la soupape est supérieure à la distance entre la plaque d'induit (3) et l'électroaimant (6) éloigné de la soupape.
  9. Dispositif d'entraînement électromagnétique de soupape selon l'une des revendications 6 à 8, selon lequel la soupape est une soupape d'admission.
  10. Dispositif d'entraînement électromagnétique de soupape selon l'une des revendications 1 à 9, selon lequel le piston hydraulique (15) est placé dans un vérin hydraulique relié au circuit d'huile du moteur.
  11. Dispositif d'entraînement électromagnétique de soupape selon la revendication 10, selon lequel le vérin hydraulique est raccordé au circuit d'huile du moteur par une électrovanne susceptible d'être fermée.
  12. Dispositif d'entraînement électromagnétique de soupape selon l'une des revendications 1 à 11, selon lequel le bras de levier court (11) comporte une vis de réglage (13) permettant le réglage fin de la position neutre.
EP03750561A 2002-10-17 2003-09-17 Dispositif electromagnetique d'actionnement de soupape a position neutre reglable Expired - Lifetime EP1552117B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10248330A DE10248330A1 (de) 2002-10-17 2002-10-17 Elektromagnetische Ventiltriebvorrichtung mit einstellbarer Neutralstellung
DE10248330 2002-10-17
PCT/EP2003/010330 WO2004035999A1 (fr) 2002-10-17 2003-09-17 Dispositif electromagnetique d'actionnement de soupape a position neutre reglable

Publications (2)

Publication Number Publication Date
EP1552117A1 EP1552117A1 (fr) 2005-07-13
EP1552117B1 true EP1552117B1 (fr) 2008-04-09

Family

ID=32049337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03750561A Expired - Lifetime EP1552117B1 (fr) 2002-10-17 2003-09-17 Dispositif electromagnetique d'actionnement de soupape a position neutre reglable

Country Status (5)

Country Link
US (1) US7188823B2 (fr)
EP (1) EP1552117B1 (fr)
JP (1) JP4324556B2 (fr)
DE (2) DE10248330A1 (fr)
WO (1) WO2004035999A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3024109A1 (de) * 1980-06-27 1982-01-21 Pischinger, Franz, Prof. Dipl.-Ing. Dr.Techn., 5100 Aachen Elektromagnetisch arbeitende stelleinrichtung
DE3920931A1 (de) * 1989-06-27 1991-01-03 Fev Motorentech Gmbh & Co Kg Elektromagnetisch arbeitende stelleinrichtung
JP3106890B2 (ja) * 1995-01-11 2000-11-06 トヨタ自動車株式会社 内燃機関の弁駆動装置
DE19723792C1 (de) * 1997-06-06 1998-07-30 Daimler Benz Ag Einrichtung zur Einstellung eines elektromagnetischen Aktuators
JP3921311B2 (ja) * 1998-10-30 2007-05-30 株式会社日立製作所 機関弁の電磁駆動装置
JP3935008B2 (ja) * 2002-07-16 2007-06-20 本田技研工業株式会社 エンジンの動弁装置

Also Published As

Publication number Publication date
US20050178990A1 (en) 2005-08-18
JP2006503211A (ja) 2006-01-26
EP1552117A1 (fr) 2005-07-13
DE10248330A1 (de) 2004-04-29
JP4324556B2 (ja) 2009-09-02
WO2004035999A1 (fr) 2004-04-29
US7188823B2 (en) 2007-03-13
DE50309591D1 (de) 2008-05-21

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