EP1131539B1 - Commande electromagnetique (mecanisme de commande pour soupape de moteur a combustion interne) - Google Patents

Commande electromagnetique (mecanisme de commande pour soupape de moteur a combustion interne) Download PDF

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Publication number
EP1131539B1
EP1131539B1 EP99958033A EP99958033A EP1131539B1 EP 1131539 B1 EP1131539 B1 EP 1131539B1 EP 99958033 A EP99958033 A EP 99958033A EP 99958033 A EP99958033 A EP 99958033A EP 1131539 B1 EP1131539 B1 EP 1131539B1
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EP
European Patent Office
Prior art keywords
lever
force
valve
valve stem
electromagnetic actuator
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
EP99958033A
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German (de)
English (en)
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EP1131539A1 (fr
Inventor
Heinz Leiber
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19852605A external-priority patent/DE19852605A1/de
Priority claimed from DE19924793A external-priority patent/DE19924793A1/de
Application filed by Individual filed Critical Individual
Publication of EP1131539A1 publication Critical patent/EP1131539A1/fr
Application granted granted Critical
Publication of EP1131539B1 publication Critical patent/EP1131539B1/fr
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
    • 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

Definitions

  • the invention relates to an electromagnetic drive with the features of the preamble of claim 1.
  • Such an electromagnetic drive is known from DE 196 28 860A1 known.
  • the anchor As swivel Lever formed.
  • the center of the anchor is closer to Swivel axis as the other end of the lever, which on the Shank, or a connecting part with the shaft of the Valve rests and acts on this (Gear ratio i ⁇ 1).
  • the area of influence of the lever is within the effective range of the two on the Anchor acting electromagnets, which is why the shaft the Yoke of a magnet must prevail.
  • a valve spring acts in the closing direction of the valve on.
  • the opposing second spring acts on the Lever over one yoke of the other electromagnet penetrating plunger.
  • the invention is based on the object, the structure of the improve electromagnetic drive.
  • the Using a lever acting on the torsion spring for Generation of at least part of the valve in the Opening direction acting spring force facilitates the Structure of the drive also because the corresponding Coil spring omitted or at least made smaller can be.
  • the torsion spring can also be a part or generate the entire counter spring force. This is reduced very much the weight.
  • the torsion bar has the advantage over a helical spring, that no high longitudinal vibrations occur, the an additional burden.
  • the torsion bar or the torsion spring has a very high working frequency Natural frequency, which is not a significant additional Generates loads.
  • Transverse displacement At the large transmission forces of the valve train arises a large frictional force in the transverse direction leading to wear leads. At the same time, this lateral force acts on the Valve guide.
  • the core idea of this invention part thus includes the direct actuation of the valve stem or the Power transmission by the overlying lever arm and the use, e.g. a flexible valve stem, which the small remaining amount .DELTA.S of the Axialversatzes, which occurs as a result of the pivoting movement, at least partially on the deflection absorbs.
  • the lever is on the valve stem in such a way that the two parts against each other slide, but preferably can roll.
  • the axial displacement .DELTA.S by Pivoting movement of the lever is created by the evasion member added. Due to the rolling movement arises only low friction due to the rolling parts. Of the flexible valve stem resembles another part of the Axial offset from. The generated by the evasion member Transverse forces on the valve guide are thus relatively low.
  • the lever / valve stem has to be designed to float so to further reduce the lateral forces.
  • the contact area is floatingly mounted at the valve stem end, z. B. as a floating plate.
  • a total of it is advantageous to at least part of the valve stem made of a material with a low thermal expansion coefficient, e.g. Invar to make essential To avoid length changes of the valve.
  • Fig. 1 shows the basic structure of the invention.
  • the lever 1 is pivotally mounted with a pivot axis 3 and with a lying in the pivot axis 3 torsion spring 4 is connected.
  • the lever 1 is located on a head 5 of a power transmission part 6, at 7 with a valve stem. 8 connected is.
  • a valve spring 9 acts via a valve disk 10 on the valve stem and holds without further Forces the valve in the closed position.
  • the Valve spring 9 alone or together with a spring force part the torsion spring 4 generate the upwardly acting spring force.
  • the counter spring force is here alone by the Torsion spring 4 generated.
  • the power transmission part 6 is formed flexible, so that z. B.
  • Fig. 2 differs from the Fig. 1 substantially only in that a rotation of the valve easily allows becomes.
  • the anchor lever 1 transmits the driving force on the head 5 of the valve stem, whose Upper part 8a is formed here flexible.
  • About one Plate 11 and an axial ball bearing 12 is the force the spring 9 transmitted to the valve plate 10.
  • the ball bearing 12 now allows both a rotation of the valve, as well as a lateral shift due to the Deflection of the valve stem 8a. This will be additional the resulting from the deflection of the valve spring Transverse forces reduced to the valve guide.
  • Fig. 3 the valve is passed through one on the valve stem 20 acting spring 21 in the direction of the closed position of Valve pressed and the lever 22 is located on the valve stem 20 on.
  • the points of contact between the two Divide 20 and 22 are rounded and leave a rolling movement approximately transversely to the axis of the shaft 20th to.
  • the shaft 20 is here divided into an outer tube 20a, on which the spring 21 acts directly and an inner shaft 20b, which in the upper area is relatively thin and so that it is flexible.
  • the force of the spring 21st is transferred to the inner shaft 20b.
  • the interior shaft 20b is in such contact with the lever 22, that the parts roll on each other during the pivoting movement. Nevertheless, there is a deflection of the valve stem. In the process, it can also be a small Sliding movement come.
  • the pivoting of the lever 22 occurring transverse offset is thus partially due to the Rolling motion, but sometimes by bending the Inner shaft balanced 20b.
  • the inner shaft 20b in particular the upper, flexible part z. B. from Invar to large Extensions of the shaft due to heat and thus increase To prevent the frictional forces at the point of contact.
  • the inner shaft is approximately in the middle of the valve with the outer tube 20a conclusively connected.
  • the end of the flexible valve stem 30 with a floating plate 33 provided to the caused by the lever 32 lateral forces on the shaft 30, if the rolling motion is not perfect can be designed.
  • the plate 33 is on the sliding underside with a low friction material Provided.
  • the outer centering spring 34 performs the Plate back to the middle position when in the back Closed position of the valve, where the armature from the magnet M1 is attracted, and thus the transfer force of the Levers is very small.
  • a double evasive link provided, namely the floating Plate with the centering spring and the flexible shaft. On he could be dispensed with
  • Fig. 5a shows a similar constellation as Fig. 3.
  • the spring 20 of Fig. 3 is replaced by a pair of coaxial spring pair 61a and 61b.
  • the points of attack on the valve plate 62a and 62b of the two springs 61a and 61b are offset by 180 ° from each other, as shown in FIG. 5b and this is also shown in Fig. 5c (in another constellation).

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

Claims (8)

  1. Dispositif d'entraínement électromagnétique comportant au moins un électroaimant (M1,M2), qui amène un levier (1) alternativement dans deux positions d'extrémité différentes, dans lequel ce levier (1) est monté de manière à pouvoir pivoter au niveau de l'une de ses extrémités (axe de pivotement 3) et s'applique, par son autre extrémité, sur la tige (8) d'une soupape, qui doit être entraínée, d'un moteur à combustion interne ou d'un organe de transmission de force (6) qui est relié à la tige de soupape (8), et dans lequel deux forces (4,9) de ressorts ayant des actions antagonistes agissent sur le levier (1), ces forces positionnant le levier (1) dans une position intermédiaire, sans excitation magnétique, caractérisé en ce qu'une seule partie (2) du levier (1) est agencée sous la forme d'une armature, qui est située en vis-à-vis des pôles du au moins un électroaimant (M1, M2), que la zone d'application de force du levier (1) se situe sur la tige de soupape (8) ou de l'organe de transmission de force (6), qui y est relié, à l'extérieur de la zone d'action du au moins un électroaimant (M1,M2), que la tige de soupape (8) et/ou l'élément de transmission de force (6), qui y est relié, possède un organe d'écartement, qui absorbe le décalage du levier (1), qui apparaít en raison du mouvement de pivotement du levier (1) lors de la transmission de force du levier (1) à la tige de soupape (8) ou à l'organe de transmission de force (6), sur l'organe de transmission de force (6), par écartement d'une partie de la tige (8) et/ou de l'organe de transmission de force (6), qui y est relié, et qu'au moins une partie de la force élastique, qui agit dans le sens de l'ouverture de la soupape, est produite par une barre de torsion (4) qui agit sur le levier (1) et est montée sur l'axe de pivotement.
  2. Dispositif d'entraínement électromagnétique selon la revendication 1, caractérisé en ce que l'organe d'écartement est formé par au moins une zone de flexion (6,8a).
  3. Dispositif d'entraínement électromagnétique selon la revendication 1 ou 2, caractérisé en ce que l'organe d'écartement est une partie montée flottante (33), qui est disposée sur la tige de soupape ou sur l'organe de transmission de force et est déplacée sous l'effet du déplacement du levier, transversalement par rapport à l'axe de la soupape et est rappelée par les forces élastiques (34).
  4. Dispositif d'entraínement électromagnétique selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins une partie de la force de ressort élastique dirigée en sens opposé est appliquée également par la barre de torsion (4).
  5. Dispositif d'entraínement électromagnétique selon l'une revendications 1 à 4, caractérisé en ce que la force du ressort de soupape (9) agit sur la tige de soupape (8) par l'intermédiaire d'un roulement à billes (12), qui autorise une torsion de la tige de soupape (8).
  6. Dispositif d'entraínement électromagnétique selon l'une des revendications 1 à 5, caractérisé en ce que les parties de contact sont formées sur le levier (22) et sur la tige de soupape (20) ou sur la partie de transmission de force (20b) de telle sorte que lors du mouvement de pivotement, il se produit un mouvement de roulement (figure 3).
  7. Dispositif d'entraínement électromagnétique selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins l'une des parties de contact (32,33), notamment l'extrémité (33) de la tige de soupape, possède une partie montée flottante.
  8. Dispositif d'entraínement électromagnétique selon l'une des revendications 1 à 7, caractérisé en ce que la tige de la soupape (8) est constituée au moins en partie par un matériau, qui possède un coefficient de dilatation thermique ayant seulement une faible valeur (par exemple de l'invar).
EP99958033A 1998-11-14 1999-11-12 Commande electromagnetique (mecanisme de commande pour soupape de moteur a combustion interne) Expired - Lifetime EP1131539B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19852605A DE19852605A1 (de) 1998-11-14 1998-11-14 Stellantrieb für ein Ventil eines Verbrennungsmotors
DE19852605 1998-11-14
DE19924793 1999-05-29
DE19924793A DE19924793A1 (de) 1999-05-29 1999-05-29 Stellantrieb für ein Ventil eines Verbrennungsmotors
PCT/EP1999/008745 WO2000029722A1 (fr) 1998-11-14 1999-11-12 Commande electromagnetique (mecanisme de commande pour soupape de moteur a combustion interne)

Publications (2)

Publication Number Publication Date
EP1131539A1 EP1131539A1 (fr) 2001-09-12
EP1131539B1 true EP1131539B1 (fr) 2003-02-05

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EP99958033A Expired - Lifetime EP1131539B1 (fr) 1998-11-14 1999-11-12 Commande electromagnetique (mecanisme de commande pour soupape de moteur a combustion interne)

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Country Link
EP (1) EP1131539B1 (fr)
DE (1) DE59904249D1 (fr)
WO (1) WO2000029722A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004050013B4 (de) * 2003-10-14 2009-03-19 Visteon Global Technologies Inc., Van Buren Elektromechanischer Ventilauslöser
US7418931B2 (en) 2005-08-02 2008-09-02 Toyota Jidosha Kabushiki Kaisha Electromagnetically driven valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1471537A (en) * 1974-12-06 1977-04-27 Venard R Engine valve control
DE3616540A1 (de) * 1986-05-16 1987-11-19 Porsche Ag Vorrichtung zum betaetigen eines gaswechsel-tellerventils einer hubkolben-brennkraftmaschine

Also Published As

Publication number Publication date
DE59904249D1 (de) 2003-03-13
EP1131539A1 (fr) 2001-09-12
WO2000029722A1 (fr) 2000-05-25

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