EP0970298B1 - Dispositif d'entrainement electromagnetique de soupape - Google Patents

Dispositif d'entrainement electromagnetique de soupape Download PDF

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Publication number
EP0970298B1
EP0970298B1 EP98919136A EP98919136A EP0970298B1 EP 0970298 B1 EP0970298 B1 EP 0970298B1 EP 98919136 A EP98919136 A EP 98919136A EP 98919136 A EP98919136 A EP 98919136A EP 0970298 B1 EP0970298 B1 EP 0970298B1
Authority
EP
European Patent Office
Prior art keywords
mechanism according
spring
electromagnetic mechanism
anchor
lever
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
EP98919136A
Other languages
German (de)
English (en)
Other versions
EP0970298A1 (fr
Inventor
Heinz Karl Leiber
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.)
LSP Innovative Automotive Systems GmbH
Original Assignee
LSP Innovative Automotive Systems GmbH
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
Priority claimed from DE19712063A external-priority patent/DE19712063A1/de
Priority claimed from DE19714412A external-priority patent/DE19714412A1/de
Priority claimed from DE19717405A external-priority patent/DE19717405A1/de
Priority claimed from DE19730191A external-priority patent/DE19730191A1/de
Application filed by LSP Innovative Automotive Systems GmbH filed Critical LSP Innovative Automotive Systems GmbH
Publication of EP0970298A1 publication Critical patent/EP0970298A1/fr
Application granted granted Critical
Publication of EP0970298B1 publication Critical patent/EP0970298B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2105—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids comprising two or more coils
    • F01L2009/2109—The armature being articulated perpendicularly to the coils axes
    • 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
    • H01F2007/1692—Electromagnets or actuators with two coils

Definitions

  • the invention relates to an electromagnetic drive the features of the preamble of claim 1.
  • Such an electromagnetic drive is from DE 3616540 A1 known. There is one indirectly from an anchor driven lever directly with a valve to be driven coupled. Between the articulation point of the lever, which by a torsion spring is given, and the lever end that the Valve stem operated, is an operating rod with side play coupled with the anchor of the electromagnetic drive is connected and by this is driven. The actuation rod and thus the anchor are stored separately using a roller bearing.
  • the invention is based on the object electromagnetic drive of the type mentioned create that has a very low bearing friction and moreover due to a reduction in the moving masses as well as optimal power transmission with lower performance can be operated.
  • This task is characterized by the characteristics of the Claim 1 solved.
  • the solution according to the invention creates a simplified one low-wear bearing with little friction. So that is no permanent oil lubrication required either.
  • the lever is direct, i.e. without an intermediate part that carries electromagnetically movable part, become the acting Forces forwarded directly without fasteners, from where a mass reduction results, a smaller one Control power entails.
  • the drive is formed by two electromagnets, between whose poles turn on by alternately switching the excitation currents Anchor as an electromagnetically movable part back and forth is movable.
  • the construction is characterized in that the Anchor, without power consumption of the drive by spring forces is held in an intermediate position.
  • a special weight reduction also results from the exclusive storage of the lever by means of the torsion bar according to claim 5, resulting from a weight saving improved efficiency of the drive results.
  • the ratio is reduced accordingly required force and also the effective moving mass for Movement of a valve so that the drive is correspondingly smaller and can be dimensioned more easily.
  • Drives also have advantageous effects with the features of claim 1, where to reduce the Movable masses actuator and element to be driven are directly coupled to one another or according to claim 9, because then e.g. by an elastic element, e.g. on Spring element valve and drive mass effectively from each other can be decoupled what is due to the acting Shock forces are advantageous.
  • the spring element can e.g. as Abhubhubfeder be designed with a stop that the stroke of for example controlled valve or the armature limited. By having a high magnetic force corresponding to the gas forces, can e.g. with an exhaust valve higher gas forces to be dealt with.
  • Fig. 1 a torsion spring (torsion bar or rotary tube) storage shown in principle. At this Storage, the masses to be accelerated are very small. It a double magnetic drive is shown, which consists of magnetic cores 1 and 2 with magnetic poles 3 and 4 out on the cores wound windings 5 and 6 and an armature 7, that moves in the field of magnets.
  • the anchor 7 When one of the electromagnets (1, 3, 5) or (2, 4,6) the anchor 7 is moved from the intermediate position shown (e.g. Middle position) towards the magnetic poles 3 or 4.
  • the intermediate position shown e.g. Middle position
  • the magnetic poles 3 and 4 are formed obliquely to the Adapted to the course of the armature 1 rotated about the axis 10 his.
  • the detailed structure of the torsion bar is shown in FIG. 3 removable.
  • a torsion bar 30 is rigidly clamped here at 31.
  • At the free end there is one that allows twisting Support bearing 32, for example, a needle bearing or plain bearing is provided.
  • With the torsion bar 30 is a bearing lever in the form of a cage 33 connected, which in turn receives the anchor 37.
  • At this Cage 33 is also an operating rod by means of a bearing 29 rotatably mounted.
  • the shaft 34 of the bearing is e.g. about a screw connection or rivets connected to the cage 33.
  • the axis 10 is the axis of rotation of the torsion bar.
  • the Cage 33 of Fig. 3 can also in Fig. 1, the bearing lever 11 of the Anchor 7 be.
  • the anchor 37 is e.g. in the cage 33 riveted. In Figure 3 are to the right and left of the Bearing shaft 34 to recognize the rivet pins.
  • Figure 1 is with the armature 7 or the bearing lever 11 Actuating rod 12 rotatably connected via a bearing 13, the in turn via a coupling member 15 with e.g. a valve lifter 16 is connected.
  • a coupling member 15 with e.g. a valve lifter 16 is connected.
  • the lateral forces at Low stroke movement In the example of FIG. 1, it is assumed that the torsion bar (in axis 10) the zero position of the armature causes itself, i.e. applies the entire spring force.
  • Fig. 2 corresponds to Fig. 1 with the difference that here the Restoring forces from the spring bar 20 and one Valve return spring 32 are formed and at a certain deflection in each direction Spring force increased. 2 this is additional Restoring force by a clamped at the right end Leaf spring pair 23/24 and an extension 25 of the armature 21 realized that an additional a certain deflection the leaf springs 23 or 24 must bend. This is also shown in Fig. 3 in a different view.
  • This two-stage spring has the advantage that the spring characteristic is better adapted to the magnetic force curve FM. Therefore, it can System already from the rest position without the usual Start-up process to be moved to the end position. About that In addition, the steep spring characteristic of the second one Spring a correspondingly high deceleration of the opposite end position arriving anchor, which is significant contributes to damping and position control. Continue wearing the possible high final force of the spring to a high Initial acceleration and thus quick valve opening.
  • FIG. 5 is for storing a Anchor 50 a torsion bar 52 is provided which the torsion bar 20 Fig. 2 corresponds.
  • the torsion bar 52 is by means of a Bearing lever 51 connected to the armature 50 so that the armature by two electromagnets (magnetic circuit 53 and 55 and Windings 54 and 56) can be moved up or down.
  • the torsion bar generates both spring forces.
  • An actuating rod 57 is articulated on the bearing lever 51, by means of an overtravel spring 58 with a valve tappet 59 connected is. By means of this overtravel spring 58, the valve is closed moved with an anchor movement.
  • overtravel spring 58 is compared to the direct coupling e.g. 1 a large one Load on the valve seat due to the mass force of the valve and avoided anchors.
  • the armature 50 during their control in the hold the corresponding end position.
  • FIG. 6 differs from FIG. 5 in particular in that that the armature 70 in its end positions by a locking roller 71 and is not held by a holding current.
  • the Locking roller 71 which in Fig. 6 under one with the armature 70th connected locking plate 72 is engaged to trigger the armature movement down by a locking magnet 73 and an associated rocker 75 rotatable about an axis 74 the locking roller is mounted, out of the latch emotional.
  • the torsion springs now accelerate the armature 70 down and a current pulse on the lower coil brings the armature finally to the other end position.
  • the Locking magnet 73 and the holder 75 are against by one Force of the locking magnet directed spring not shown in the position shown.
  • the actuating rod 57 is not hinged directly to the armature 50 but to the bearing lever 51. This is the way of the armature and the valve differently.
  • the end of the operating rod 57 is in the middle position on the valve stem head.
  • Fig. 7b a Side view and Fig. 7a a view seen from the right shows.
  • the operating rod is at 87, the valve stem at Designated 89.
  • the overtravel spring 88 is with the Actuator rod 87 connected and engages in a fork shape Groove of the valve lifter 89.
  • Fig. 7b is in the upper part e.g. welded stop (85.86) can be seen. Parts 85, 86, 87 can consist of one piece.
  • Fig. 9 is a spring 98 with an envelope 99 shown, which acts as a catch plate and causes that at a break in the overtravel spring 93 over the stop can be moved into the closing end position without hitting on the piston.
  • the overtravel spring can, as shown in FIG. 10, also between the Actuating rod 107 and the connecting part 101 arranged his.
  • the stop is here by a pin 103 and a Elongated hole 102 causes.
  • 10 shows another Adjustment screw 104, with which the distance, i.e. the Valve play between the operating rod and valve lifter, the Coupling is stiff here, can be adjusted.
  • Fig. 11 shows an example in which the Actuating rod 117 via a spring 118 with the bearing lever 111 is connected.
  • the spring 118 is one here Leaf / spiral spring. This is a wear-free joint possible, with a kink protection for the spiral spring 118 can be provided.
  • the actuating rod 117 could be by means of of a leaf spring joint to be articulated on the bearing lever 111.
  • the aim of this is the driving force of the electromagnetic Drive increase to either this higher force or to use the magnets while maintaining the same force out.
  • This design is particularly advantageous for the reduction the moving masses, where the anchor is a relative has a large share. Here it decreases linearly with increasing Leverage ratio the effective mass.
  • This Training is particularly important when using the electromagnetic actuator for valve control of Internal combustion engines are an advantage because of the great power in them the end positions and the air gap of the armature is not is dominant.
  • the torsion bar is shown schematically at 120.
  • the bearing lever 121 is shown as a line; the anchor bears the reference numeral 122, the actuating rod the reference numeral 123.
  • the actuating rod 123 is now connected at a distance 11 from the bearing point 120 to the bearing lever 121, while the center of the armature is 12 away therefrom.
  • the magnetic force FM is shown as arrow 124.
  • the electromagnetic drive described above can Driving a gas exchange valve or another comparable valve can be used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (21)

  1. Dispositif d'entraínement électromagnétique de soupape comportant deux électroaimants (1, 2) et une armature montée de manière à être mobile, déplaçable en va-et-vient entre des surfaces polaires des électroaimants (1, 2) et qui, lors de l'activation d'un électroaimant, est amené dans l'une des deux positions d'extrémité, et dans lequel sous l'effet du déplacement de l'armature (7, 27, 37, 50, 70) déplaçable par voie électromagnétique, une soupape d'un moteur à combustion interne est entraínée, et dans lequel un levier (11, 21, 33, 51) articulé sur l'une de ses extrémités porte directement l'armature (7, 27, 37, 50) sans aucun élément intermédiaire, caractérisé en ce que l'armature (7, 27, 37, 50) est amenée dans une position intermédiaire sous l'action de forces de ressorts, lorsque les électroaimants (1, 2) sont débranchés, et y est retenue, et que le levier (11, 21, 33, 51) est relié à une barre de torsion ou à un tube de torsion (10, 20, 30) et qu'un élément d'actionnement (12, 22, 57) est articulé de manière à pouvoir tourner sur l'armature (7, 27, 37, 50, 70) ou sur le levier (11, 21, 33, 51), et que cet élément d'actionnement (12, 22, 57) agit sur la soupape et que les deux pôles de chaque électroaimant (1, 2) forment respectivement une position d'extrémité pour l'armature ou le levier
  2. Dispositif d'entraínement électromagnétique selon la revendication 1, caractérisé en ce que le levier forme un cadre ou une cage (33) qui entoure l'armature déplaçable par voie électromagnétique.
  3. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que la barre de torsion (30) est retenue dans un palier d'appui (32).
  4. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que l'axe de la barre de torsion est disposé perpendiculairement à la direction de déplacement de la partie entraínée (59).
  5. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que la barre de torsion (10, 20) est le support unique du levier (11, 21).
  6. Dispositif d'entraínement électromagnétique selon la revendication 5, caractérisé en ce que l'organe d'actionnement (12) est fixé à l'armature (7).
  7. Dispositif d'entraínement électromagnétique selon la revendication 6, caractérisé en ce que l'organe d'actionnement (57) est fixé entre le palier (52) du levier et l'armature (50) présente sur le levier (51).
  8. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que l'organe d'actionnement (12, 22, 57) est articulé de manière à être déplaçable en rotation sur l'armature (7, 27, 37, 50, 70) au moyen d'un roulement (29), ou est articulé sur le levier (11, 21, 33, 51).
  9. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que pour la liaison de l'organe d'actionnement (87) et de l'élément (89) devant être entraíné, il est prévu un élément de ressort (88).
  10. Dispositif d'entraínement électromagnétique selon la revendication 9, caractérisé en ce qu'au moins un autre ressort est disposé parallèlement à l'élément de ressort (90).
  11. Dispositif d'entraínement électromagnétique selon la revendication 9, caractérisé en ce que l'élément de ressort (90) est un ressort à dépassement de point mort.
  12. Dispositif d'entraínement électromagnétique selon la revendication 11, caractérisé en ce que le ressort à dépassement de point mort (98) possède un ressort enveloppant (99).
  13. Dispositif d'entraínement électromagnétique selon l'une des revendications 11 ou 12, caractérisé en ce qu'une butée (85, 86) est prévue pour la contrainte maximale du ressort à dépassement de point mort (88).
  14. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce qu'un élément de centrage (84) est prévu pour l'alignement de l'organe d'actionnement (87) par rapport à la tige de soupape (89).
  15. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce qu'un élément de ressort (108) est disposé entre le levier (101) et l'organe d'actionnement (107).
  16. Dispositif d'entraínement électromagnétique selon la revendication 15, caractérisé en ce que l'élément de ressort (108) est agencé sous la forme d'un ressort à dépassement de point mort.
  17. Dispositif d'entraínement électromagnétique selon la revendication 15, caractérisé en ce que l'élément de ressort est agencé sous la forme d'un ressort spiral (118).
  18. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce qu'à partir d'une certaine déviation de la partie (21) mobile par voie électromagnétique à partir de la position intermédiaire, au moins un couple supplémentaire de ressort (24; 25), qui renforce l'action de rappel, devient actif.
  19. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que l'organe d'actionnement (116) comporte, pour le réglage de sa longueur, une vis de réglage (104).
  20. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que l'armature (70) est maintenue fixe dans les positions d'extrémité par un système d'encliquetage mécanique (71, 75), qui peut être actionné par voie électromagnétique.
  21. Dispositif d'entraínement électromagnétique selon l'une des revendications précédentes, caractérisé en ce que l'armature (5) peut être fixée dans les positions d'extrémité par une excitation électromagnétique de maintien (60, 61).
EP98919136A 1997-03-24 1998-03-24 Dispositif d'entrainement electromagnetique de soupape Expired - Lifetime EP0970298B1 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DE19712063 1997-03-24
DE19712063A DE19712063A1 (de) 1997-03-24 1997-03-24 Elektromagnetischer Antrieb
DE19714412A DE19714412A1 (de) 1997-04-08 1997-04-08 Elektromagnetischer Antrieb
DE19714412 1997-04-08
DE19717405 1997-04-24
DE19717405A DE19717405A1 (de) 1997-04-24 1997-04-24 Elektromagnetischer Antrieb E 13
DE19730191 1997-07-15
DE19730191A DE19730191A1 (de) 1997-07-15 1997-07-15 Elektromagnetischer Antrieb
PCT/EP1998/001719 WO1998042960A1 (fr) 1997-03-24 1998-03-24 Dispositif d'entrainement electromagnetique

Publications (2)

Publication Number Publication Date
EP0970298A1 EP0970298A1 (fr) 2000-01-12
EP0970298B1 true EP0970298B1 (fr) 2002-06-19

Family

ID=27438581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98919136A Expired - Lifetime EP0970298B1 (fr) 1997-03-24 1998-03-24 Dispositif d'entrainement electromagnetique de soupape

Country Status (3)

Country Link
EP (1) EP0970298B1 (fr)
DE (1) DE59804515D1 (fr)
WO (1) WO1998042960A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860451A1 (de) 1998-12-28 2000-06-29 Heinz Leiber Antrieb für ein Ventil eines Verbrennungsmotors
DE19923902A1 (de) 1999-05-25 2000-11-30 Heinz Leiber Verbrennungsmotor
DE19948207A1 (de) * 1999-10-07 2001-04-12 Heinz Leiber Elektromagnetischer Aktuator
FR2818431B1 (fr) * 2000-12-15 2003-04-18 Renault Dispositif d'entrainement lineaire d'une soupape au moyen d'aimants mobiles
EP1215370A1 (fr) * 2000-12-15 2002-06-19 Renault Dispositif d'entrainement lineaire d'une soupape au moyen d'aimants mobiles
DE20305920U1 (de) 2003-04-11 2003-08-14 TRW Deutschland GmbH, 30890 Barsinghausen Vorrichtung zur nockenwellenlosen Betätigung eines Gaswechselventils
FR2854489B1 (fr) * 2003-04-30 2007-01-12 Jacques Clausin Actionnement electromagnetique a palette oseillante, puissant et rapide dont les mouvements et les efforts sont parfaitement controles par des moyens de commande specifiques a l'actionneur
US20050076866A1 (en) * 2003-10-14 2005-04-14 Hopper Mark L. Electromechanical valve actuator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6606789U (de) 1968-02-22 1970-12-03 Dynamit Nobel Ag Elektromagnetischer vibrationsantrieb.
DE2334211A1 (de) * 1973-07-05 1974-11-21 Schneider Co Optische Werke Stellmotor
GB1471537A (en) * 1974-12-06 1977-04-27 Venard R Engine valve control
GB1524322A (en) 1976-01-23 1978-09-13 British Internal Combust Eng Electromagnetic vibration exciter
GB2088137A (en) * 1980-11-21 1982-06-03 Veisz Gyoergy Magnetomechanical converter
JPS57173914A (en) * 1981-04-20 1982-10-26 Ricoh Co Ltd Position selecting mechanism
US5314164A (en) * 1992-07-17 1994-05-24 Mks Instruments, Inc. Pivotal diaphragm, flow control valve
WO1997017561A1 (fr) * 1994-11-09 1997-05-15 Aura Systems, Inc. Soupape a armature a charniere et a commande electromagnetique

Also Published As

Publication number Publication date
WO1998042960A1 (fr) 1998-10-01
DE59804515D1 (de) 2002-07-25
EP0970298A1 (fr) 2000-01-12

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