EP1146205A2 - Elektromagnetischer Aktuator mit Federhaltekappe zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine - Google Patents
Elektromagnetischer Aktuator mit Federhaltekappe zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine Download PDFInfo
- Publication number
- EP1146205A2 EP1146205A2 EP00127671A EP00127671A EP1146205A2 EP 1146205 A2 EP1146205 A2 EP 1146205A2 EP 00127671 A EP00127671 A EP 00127671A EP 00127671 A EP00127671 A EP 00127671A EP 1146205 A2 EP1146205 A2 EP 1146205A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- support cap
- housing
- opening
- actuator according
- 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.)
- Granted
Links
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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
Definitions
- An electromagnetic actuator for actuating a gas exchange valve on a piston internal combustion engine must be large Quantity produced in series and therefore also inexpensively can be.
- Such an electromagnetic Actuator for actuating a gas exchange valve that against the force of an opening spring and a closing spring between its open position and its closed position via one Anchor is guided to move back and forth, has at a distance on their pole faces facing electromagnets that serve as an opening magnet and a closing magnet.
- each for the electromagnet a housing part for receiving the provided with the coil Yoke body is provided, the assembly to one full electromagnetic actuator in a standard Manufacturing enables.
- the housing part is here expediently from a metal with non-magnetic properties made, for example, of aluminum or Aluminum alloys, so that by appropriate casting processes, for example a die casting process, to meet the requirements Housing shapes adapted to the respective purpose can be produced inexpensively in large numbers.
- the housing part is used on its the pole face Side facing away from the yoke body each with a tubular Opening for receiving one end of a return spring provided so that it for both the closing side as can also be used for the part on the opener side.
- the closing spring is on the housing facing the valve through the opening between the engine block and supports a spring plate on the valve stem.
- the opening spring is on the housing facing away from the valve passed through the opening, which is on a threaded sleeve supports the middle position of the anchor between the two pole faces is adjustable.
- a threaded sleeve not only requires high manufacturing and assembly costs but also has disadvantages in terms of reproducibility the optimal setting as well as disadvantages in the Handle during service work.
- the invention has for its object an electromagnetic To create an actuator of the type described above, in which the disadvantages listed are avoided.
- Pluggable support body is easy to assemble and offers furthermore the advantage that it is a preferred one Embodiment of the invention from sheet steel by forming can be produced in large numbers. Manufacturing from A steel sheet also has the advantage that this support cap exposed to high tensile stress is relatively can be formed thin-walled.
- the fastening and locking means can be designed over a large area can, so that the surface pressures between the fasteners the support cap made of steel and the for example, housing made of die-cast aluminum can lie on top of each other with a low surface pressure.
- each part of the lock form.
- the lock as a bayonet lock is formed on a part (support cap or housing) at least one radial projection and on other part (housing or support cap) a receptacle for the Has a head start.
- the projection and / or the inclusion with respect to the Movement axis of the gas exchange valve is designed as a helical surface is. This makes it possible to use a relative Twisting the support cap relative to the housing is a change the preload of the opening spring and thus the middle position of the armature between the two pole faces.
- securing devices for fixing the support cap provided on the housing in a predeterminable installation position are provided on the housing in a predeterminable installation position.
- the bottom of the support cap supporting the opening spring is provided at least one approach for an assembly tool.
- This approach to an assembly tool can be through a square opening in the bottom of the support cap or by two arranged at a radial distance from the central axis of the support cap Insert opening may be given, depending on the design either a square key or one Key used in the form of a so-called hook key after inserting the support cap into the through opening, which is achieved by compressing the Opening spring happens, the support cap then in the locking position can be rotated.
- a support cap made of sheet steel at least is hardened in its base area.
- the opening spring rests on one end, connected to an anchor bolt Spring plate made of appropriately resistant material from.
- the other end of the opening spring is supported on the floor the support cap. Since absorb considerable spring forces here are and the support of the springs in the operation of a is subject to swelling pressure, is caused by hardening at least the bottom region of the support cap Wear avoided by "working in” the free spring end.
- the electromagnetic actuator shown in Fig. 1 is essentially made up of two electromagnets, one Closing magnet 1 and an opening magnet 2, which have spacers 3.1 and 3.2 spaced from each other and are aligned with each other with their pole faces 4.
- an armature 5 arranged, via a guide, for example a guide rod 6, is guided back and forth.
- the armature 5 has a rectangular shape Basic form on.
- the split guide rod 6 is at its upper end 7 with a return spring serving as an opening spring 8 in connection.
- the other, lower free end 9 of the guide rod 6 is based on the free end 10 of the shaft 11 of a valve in the cylinder head only indicated here 12 of a piston internal combustion engine is guided.
- a serving as a closing spring 13 is the gas exchange valve acted upon in the closing direction, the Closing spring 13 and the opening spring 8 in their direction of force are directed towards each other so that when de-energized Electromagnet of the armature 5 corresponding to its rest position in a central position between the two pole faces 4 of the two Electromagnets 1 and 2 occupies, as shown in Fig. 1 is.
- the armature 5 arrives alternately the pole faces 4 of the two electromagnets 1 and 2 for contact and the gas exchange valve will operate accordingly during the Duration of the current supply in the open position (system on the electromagnet 2) against the force of the closing spring 13 and in Closed position (contact with the pole face of the electromagnet 1) held against the force of the opening spring 8.
- the electromagnetic actuator shown in Fig. 1 provides a unit that is modular in terms of practically identical Elements is composed.
- the two electromagnets are preferably of identical construction and consist essentially of a housing 14 which is open towards the armature Has recess 15 into which a yoke body 16 with Coil 17 is inserted.
- the housing 14 also has a Through opening 18 through which the respective opening spring 8 or return spring 13 is passed.
- the housing 14 also has a further lateral opening 20 on, which allow access to contacts 21 of the coil 17.
- the plug 22 is here in the side flanks of the opening 20 managed and protected.
- this has, for example, a Die-cast aluminum housing 14 6 through openings parallel to the axis of the guide rod 23 on which corresponding through openings are assigned in the spacers 3.1 and 3.2.
- This gives you the option of using the appropriate clamping screws 24, as indicated by dash-dotted lines in FIG. 1, all Clamp the housing together to form an overall component and / or to connect firmly to the engine block 12.
- the opening spring 8 is a Adjustment element trained support cap 25 supported. By Twist the support cap or by inserting shims can the middle position of the armature 5 between adjust the two pole faces 4.
- FIG. 2 is a perspective view of a housing 14 with inserted support cap 25 but without inserted Yoke body shown.
- the through hole 18 is on the Yoke body facing away from a collar 19.
- the through opening on its inside is diametrical opposite sides with a groove-shaped recess 26 provided on the support cap 25 a corresponding Projection 27 (Fig. 5, 6, 7) is assigned. So that is it is possible to axially support cap 25 into the through hole 18 and by twisting, as can be derived from FIG. 1, after Type of a bayonet lock.
- the support cap will open the spring 8 accordingly biased so that by the bias of the opening spring 8th the support cap 25 is held in position even if the armature 5 on the pole face 4 of the opening magnet 2 is present.
- the bottom 28 of the support cap 25 is here with an opening 29 provided in the embodiment shown in Fig. 2 has a square shape and as a tool attachment serves to rotate the support cap 25 after insertion.
- the through opening 29 is correspondingly round educated.
- tool approaches serve as shown in Fig. 5, spaced apart Holes 29.1 in which a corresponding as a hook wrench trained tool can be used.
- Fig. 2 The embodiment shown in Fig. 2 is in Fig. 3, 4 and 5 shown in individual parts and will be described in more detail below described.
- Fig. 3 leaves the arrangement in perspective recognize the groove-shaped recesses 26.
- FIG. 4 The sectional view in Fig. 4 also reveals that the lower right-hand to the groove-shaped recesses 26 Edge 30 of through opening 18 has a recess, which, as can be seen in FIG. 4, is designed as a spiral surface 31 is and with a variety of successive wells is provided.
- the projections 27 nose-like ridges 32 on the wells the helical surface 31 by rotating the support cap 25 in the Through opening 18 can be brought into engagement.
- the slope of the helical surface 31 changes the distance Bottom surface 28 relative to the pole surface 4 of the closing magnet 1 in the sense of a shortening, if after inserting the Support cap 25 is rotated clockwise.
- the anchor 5 is biased more and accordingly the anchor 5 with appropriate compression of the Closing spring 13 correspondingly in the direction of the pole face 4 of the opening magnet 2 pushed.
- the support cap 25 is then secured against rotation locked in the housing 14.
- the arrangement is with their locking trained in the manner of a bayonet catch.
- edge 27.1 of the projections 27 with a sequence of tooth-like recesses provided which at least one corresponding axially through the Bund 19 guided holding hole is assigned, so that after Adjustment of the middle position with a fixing pin the axial bore in the collar 19 and a corresponding one Recess through the edge 27.1 of the projection 27 Pen can be fixed.
- FIG. 8 is a perspective view Embodiment shown, in which the housing 14 on its the side facing away from the yoke body fret-like approaches 19.1 is provided with radial retaining pins 34 are provided, as shown in the sectional view acc. Fig. 9 can be seen.
- the pins 34 engage corresponding recesses or through holes 35 in the Circumferential wall of the support cap 25.
- the recesses 35 10 can be designed as bores, as shown in FIG. the pins 34 being loosened to loosen the support cap 25 have to.
- Fig. 11 shows a slot-shaped recess 36 on the outer wall to provide that in the supervision an approximately L-shaped course has and ends in a rest 37.
- Support cap can be attached to the firmly in the collar-shaped approach 19.1 inserted pins 34 pushed and twisted be locked.
- the support cap 25 held in position by the bias of the opening spring 8.
- the middle position is adjusted the anchor 5 in such a way that on the inside of the floor 28 one or more shims 38 with a given thickness be inserted before the support cap 25 is pushed on becomes.
- the above-described shims 38 can then also used when adjusting the center position of the through the helical surface 31 on the housing 14 on the one hand and the Projection 27 on the support cap 25, on the other hand (see FIG. 4 and 5) available travel is not sufficient.
- the wall thicknesses available for the housing 14 are sufficient to deal with the swelling that occurs during operation Stresses also when manufacturing from aluminum or Die-cast aluminum.
- the thin-walled one Support cap 25 is expediently made of sheet steel, at least to increase wear resistance the floor 28 is hardened to incorporate the on the floor surface Avoid internal spring contact during operation. Despite the thin walls, the steel sheet can swelling spring forces acting between the housing and the support cap 25 be included as a tensile load.
- the Arrangement of projection and recording can also be interchanged can, i.e. the through opening 18 can be instead of a groove-shaped Recording 26 assigned a corresponding projection 27 and the support cap 25 can instead of a projection a corresponding groove-shaped receptacle can be assigned, how this according to the embodiments. 8 to 11 is shown and described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Magnetically Actuated Valves (AREA)
- Electromagnets (AREA)
Abstract
Description
- Fig. 1
- einen Vertikalschnitt durch einen elektromagnetischen Aktuator zur Betätigung eines Gaswechselventils,
- Fig. 2
- in perspektivischer Ansicht ein Gehäuse für den Schließmagneten mit Stützkappe für die Öffnerfeder,
- Fig. 3
- perspektivisch das Gehäuse gem. Fig. 2,
- Fig. 4
- einen Vertikalschnitt gem. Der Linie IV-IV in Fig. 3 durch das Gehäuse,
- Fig. 5
- eine perspektivische Ansicht der Stützkappe der Ausführungsform gem. Fig. 2,
- Fig. 6
- einen Vertikalschnitt durch die Stützkappe gem. der Linie VI-VI in Fig. 5,
- Fig. 7
- eine abgewandelte Ausführungsform der Stützkappe gem. Fig. 6 im Schnitt,
- Fig. 8
- in perspektivischer Ansicht eine andere Ausführungsform für das Gehäuse des Schließmagneten,
- Fig. 9
- einen Vertikalschnitt gem. der Linie IX-IX in Fig. 8,
- Fig. 10
- in perspektivischer Ansicht eine Stützkappe der Ausführungsform gem. Fig. 8/9,
- Fig. 11
- in perspektivischer Ansicht eine andere Ausfüh- rungsform für eine Stützkappe der Ausführungs- form gem. Fig. 8.
Claims (9)
- Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine, das gegen die Kraft einer Öffnerfeder (8) und einer Schließfeder (13) zwischen seiner Offenstellung und seiner Schließstellung über einen Anker (5) hin und her bewegbar ist, und mit zwei im Abstand zueinander angeordneten Elektromagneten, die als Öffnermagnet (2) und als Schließmagnet (1) dienen und jeweils einen Jochkörper (16) mit Spule (17) aufweisen, deren Polfläche (4) jeweils dem Anker (5) zugekehrt ist, und die jeweils in einem Gehäuse (14) befestigt sind, das auf seiner der Polfläche (4) abgekehrten Seite eine Durchgangsöffnung (18) aufweist, und mit einer Stützkappe (25) für die Öffnerfeder (8), die an der Durchgangsöffnung (18) am Gehäuse (14) des Schließmagneten (1) über eine axial einsteckbare Verriegelung befestigt ist.
- Aktuator nach Abspruch 1, dadurch gekennzeichnet, daß die Stützkappe (25) einerseits und das Gehäuse (14) andererseits im Bereich der Durchgangsbohrung (18) jeweils einen Teil der Verriegelung (31, 37) bilden.
- Aktuator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Verriegelung als Bajonettverschluß ausgebildet ist, der an einem Teil (Stützkappe 25 oder Gehäuse 14) wenigstens einen radialen Vorsprung (37) und am anderen Teil (Gehäuse 14 oder Stützkappe 25) eine Aufnahme (31) für den Vorsprung (37) aufweist.
- Aktuator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Vorsprung (37) und/oder die Aufnahme in bezug auf die Bewegungsachse des Gaswechselventils als Wendelfläche (31) ausgebildet sind.
- Aktuator nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Sicherungsmittel (32; 33) zur Fixierung der Stützkappe (25) am Gehäuse (14) in einer vorgebbaren Einbaustellung vorgesehen sind.
- Aktuator nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der die Öffnerfeder (8) abstützende Boden (28) der Stützkappe (25) mit wenigstens einem Ansatz (29; 29.1) für ein Montagewerkzeug versehen ist.
- Aktuator nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Stützkappe (25) aus Stahlblech durch Umformen hergestellt ist.
- Aktuator nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Stützkappe (25) zumindest im Bereich ihres Bodens (28) gehärtet ist.
- Aktuator nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß auf dem Boden (28) der Stützkappe (25) wenigstens eine an der Öffnerfeder (8) anliegende Einstellscheibe (38) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10018739 | 2000-04-15 | ||
DE10018739A DE10018739A1 (de) | 2000-04-15 | 2000-04-15 | Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1146205A2 true EP1146205A2 (de) | 2001-10-17 |
EP1146205A3 EP1146205A3 (de) | 2001-11-14 |
EP1146205B1 EP1146205B1 (de) | 2005-07-06 |
Family
ID=7638869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00127671A Expired - Lifetime EP1146205B1 (de) | 2000-04-15 | 2000-12-18 | Elektromagnetischer Aktuator mit Federhaltekappe zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US6502534B2 (de) |
EP (1) | EP1146205B1 (de) |
JP (1) | JP2001317317A (de) |
AT (1) | ATE299229T1 (de) |
DE (2) | DE10018739A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2821570B1 (fr) * | 2001-03-01 | 2003-11-07 | Snecma Moteurs | Carter etanche a fermeture quart de tour |
DE102005031241A1 (de) * | 2005-07-01 | 2007-01-04 | Fev Motorentechnik Gmbh | Variabler Ventiltrieb einer Kolben-Brennkraftmaschine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19825728A1 (de) | 1997-07-15 | 1999-01-21 | Fev Motorentech Gmbh & Co Kg | Elektromagnetischer Aktuator mit Gehäuse |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5961097A (en) * | 1996-12-17 | 1999-10-05 | Caterpillar Inc. | Electromagnetically actuated valve with thermal compensation |
JPH10274017A (ja) * | 1997-03-31 | 1998-10-13 | Nippon Soken Inc | 電磁式弁駆動装置 |
DE19756095C2 (de) * | 1997-12-17 | 2001-11-22 | Telefunken Microelectron | Vorrichtung zum Betrieb von Aktoren zur elektromagnetischen Ventilsteuerung bei Brennkraftmaschinen |
EP0977213A1 (de) * | 1998-07-29 | 2000-02-02 | DaimlerChrysler AG | Aktor zur elektromagnetischen Ventilsteuerung |
US6199843B1 (en) * | 1999-04-12 | 2001-03-13 | Siemens Automotive Corporation | Anti-friction helical spring assembly to prevent one end of a spring from rotating during expansion or compression of the spring |
-
2000
- 2000-04-15 DE DE10018739A patent/DE10018739A1/de not_active Withdrawn
- 2000-12-18 AT AT00127671T patent/ATE299229T1/de not_active IP Right Cessation
- 2000-12-18 EP EP00127671A patent/EP1146205B1/de not_active Expired - Lifetime
- 2000-12-18 DE DE50010667T patent/DE50010667D1/de not_active Expired - Fee Related
-
2001
- 2001-03-09 JP JP2001066926A patent/JP2001317317A/ja not_active Withdrawn
- 2001-04-16 US US09/834,902 patent/US6502534B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19825728A1 (de) | 1997-07-15 | 1999-01-21 | Fev Motorentech Gmbh & Co Kg | Elektromagnetischer Aktuator mit Gehäuse |
Also Published As
Publication number | Publication date |
---|---|
ATE299229T1 (de) | 2005-07-15 |
EP1146205B1 (de) | 2005-07-06 |
DE50010667D1 (de) | 2005-08-11 |
US6502534B2 (en) | 2003-01-07 |
EP1146205A3 (de) | 2001-11-14 |
US20010047779A1 (en) | 2001-12-06 |
DE10018739A1 (de) | 2001-10-18 |
JP2001317317A (ja) | 2001-11-16 |
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