EP0935054A2 - Vérin électromagnétique - Google Patents

Vérin électromagnétique Download PDF

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Publication number
EP0935054A2
EP0935054A2 EP99100674A EP99100674A EP0935054A2 EP 0935054 A2 EP0935054 A2 EP 0935054A2 EP 99100674 A EP99100674 A EP 99100674A EP 99100674 A EP99100674 A EP 99100674A EP 0935054 A2 EP0935054 A2 EP 0935054A2
Authority
EP
European Patent Office
Prior art keywords
armature
magnet
electromagnets
opening
sleeve
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.)
Withdrawn
Application number
EP99100674A
Other languages
German (de)
English (en)
Other versions
EP0935054A3 (fr
Inventor
Matthias Gramann
Thomas Röckl
Michael Nagel
Rudolf Wilczek
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.)
Conti Temic Microelectronic GmbH
Original Assignee
Temic Telefunken Microelectronic 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
Application filed by Temic Telefunken Microelectronic GmbH filed Critical Temic Telefunken Microelectronic GmbH
Publication of EP0935054A2 publication Critical patent/EP0935054A2/fr
Publication of EP0935054A3 publication Critical patent/EP0935054A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to an electromagnetic actuator according to the Preamble of claim 1.
  • Such an electromagnetic actuator is for example from DE 296 04 946 U1 known.
  • This known actuator has one as an electromagnet executed opening magnet, a spaced from this, also designed as an electromagnet closer magnet as well as an anchor, which is connected via a plunger with a gas exchange valve Active connection is established.
  • For opening and closing the gas exchange valve is switched on by alternating energization of the two electromagnets generates magnetic force acting through the armature, through which the armature between two opposite pole faces of these electromagnets back and forth is moved here.
  • the main disadvantage of this actuator is that during the opening process, in which the armature from the pole face of the closer magnet to Pole face of the opening magnet is moved, in contrast to the closing process, in which the armature from the pole face of the opening magnet to the pole face of the closer magnet is moved, work against the high gas pressure must be done in the combustion chamber.
  • the opening process therefore takes longer than the closing process, which is unfavorable to the dynamic Properties of the actuator affects.
  • the invention has for its object an electromagnetic actuator according to the preamble of claim 1 to specify the improved has dynamic properties, in particular it should Enable faster opening of the gas exchange valve.
  • the actuator has a space between the Pole surfaces of the two electromagnets, d. H. the range of motion of the anchor, enclosing two-part connecting sleeve, which consists of an am Opener magnets attached ferromagnetic partial sleeve and one on Closer magnet assembled non-ferromagnetic partial sleeve is.
  • the connecting sleeve fulfills two functions: firstly it keeps the two electromagnets in their relatively spaced apart Position fixed and on the other hand it causes due to the low magnetic Resistance of their ferromagnetic partial sleeve an increase the magnetic force acting on the armature over long armature travel lengths of the opening magnet.
  • the anchor has one in the middle tap into the armature attached to the opening magnet into a extend into the complementary recess of the opening magnet. Similar Like the ferromagnetic partial sleeve, this pin also works for large ones Armature stroke lengths reduce the effective in the magnetic circuit Air gap, which leads to a further increase in the magnetic force of the opening magnet leads.
  • the armature preferably has a cross section at least in a partial area with decreasing thickness towards anchor edge, the change the thickness is advantageously chosen such that the magnetic River normal areas within this sub-area almost the same are great. This leads to a reduction in the accelerated Mass, which leads to a further improvement in the actuator dynamics.
  • the Pole surfaces of the electromagnets are preferred in their geometric shape complementary to the respective anchor surfaces facing them executed so that the distance between the armature surface and the pole face of the respective electromagnets in contact with the respective electromagnet Anchor is negligible small.
  • the actuator has a gas exchange valve 5 in Force-acting plunger 4, one with the plunger 4 transverse to the longitudinal axis of the plunger, d.
  • H. Anchor 1 fastened transversely to the anchor stroke path, and also an as opening magnet 2 acting first electromagnet and as Closer magnet 3 acting second electromagnet.
  • the two Electromagnets 2, 3 are arranged at a distance from one another and have opposite pole faces 21, 31 between which the armature 1 by alternately energizing the excitation coils 20, 30 in the direction of Ram longitudinal axis is movable.
  • ferromagnetic Sub-sleeve 70 and a non-ferromagnetic sub-sleeve 71 assembled two-part connecting sleeve 7 connected to each other, which the space 90, 91 between the pole faces 21, 31 against contamination seals and the electromagnets 2, 3 in their from each other holds spaced position.
  • the ferromagnetic partial sleeve 70 is included on the opening magnet 2 and the non-ferromagnetic partial sleeve 71 on Closer magnet 3 attached.
  • the two partial sleeves 70, 71 are on their End faces 72, for example by means of a soldered or adhesive connection, with one another connected.
  • Two counteracting actuating springs 60, 63 which are between the opening magnet 3 and the gas exchange valve 5 are arranged and by means of two Spring plate 61, 62 on the actuator or cylinder head 8 of the internal combustion engine are fixed, cause the armature 1 in the de-energized state of the excitation coils 20, 30 in an intermediate position approximately in the middle between the Pole surfaces 21, 31 of the electromagnet 2, 3 is held.
  • To close of the gas exchange valve 5 becomes the excitation coil 30 of the closing magnet 3 energized so that the armature 1 due to the magnetic force then acting on it is moved in the direction of the pole face 31 of the closer magnet 3 and is held there until the flow of electricity is interrupted.
  • the armature 1 has in the middle of the opening magnet 2 facing Side on a pin 11, which is advantageously cylindrical with a recess for receiving the plunger 4 and which in the case of armature 1 resting on the opening magnet 2 into a pin 11 complementary recess 22 of the opening magnet 2 is inserted.
  • the height of the pin 11 is equal to the height of the protruding from the pole face 21 Part of the ferromagnetic sub-sleeve 70, i.e. H.
  • the armature 1 furthermore has a partial area with a direction toward the armature edge decreasing thickness, the change in thickness chosen in this way is that the surfaces normal to the magnetic flux within this Partial area are almost the same size.
  • the inner and outer surface areas 12, 13 are perpendicular to the armature stroke and are from the opening magnet 2 tightened anchor 1 at corresponding surface areas of the pole face 21 of the opening magnet 2 or are negligible of these via air gaps Size spaced.
  • An anchor is also conceivable, in which the partial area is also in the direction Anchor edge of decreasing thickness through appropriate three-dimensional Design of the armature surface facing the closer magnet 3 is formed.
  • the surface of the anchor on the Opener magnet 2 facing side in the surrounding the pin 11 Area just be executed.
  • the yokes of the electromagnet 2, 3 and the armature 1 are made of soft magnetic Made of materials with high magnetic permeability. You point in top view, d. H. in a projection plane perpendicular to the anchor stroke, a rectangular cross-section so that you get an optimal Utilization of space achieved when installing the actuator in the internal combustion engine.
  • the magnetic force-stroke characteristic curves of the two electromagnets 2, 3 differ in that the magnetic force F MO of the opening magnet 2 is greater than that of the same from a certain stroke d x , ie from a certain value of the armature stroke path length d 0 Value of the armature stroke length d S magnetic force F MS of the make magnet 3 acting on the armature 1.
  • the change in the magnetic energy along the armature travel d 0 or d S is decisive for the magnitude of the magnetic force F MO or F MS .
  • this change is essentially determined by the change in the magnetic resistance of the air gap 90 between the armature 1 and the pole face 31 of the closing magnet 3, ie by the armature travel d S.
  • the magnetic resistances of the armature 1 and the closing magnet 3 can be neglected for large armature travel lengths d S.
  • the magnetic force F MS of the closing magnet 3 acting on the armature 1 is inversely proportional to the square of the armature stroke path length d S and is only limited by the magnetic resistance of the armature 1 and the closing magnet 3 at very small armature stroke path lengths d S.
  • the change in magnetic energy is determined both by the armature travel d 0 and by the size of the air gap 92 between the ferromagnetic partial sleeve 70 and armature 1 and by the size of the air gap 93 between the side surfaces of the pin 11 and the depression 22. If the armature 1 is in a position within the ferromagnetic partial sleeve 70, due to its low magnetic resistance, this forms a magnetic secondary shot in the magnetic circuit of the opening magnet 2, so that a large part of the magnetic flux is conducted to the armature 1 via the ferromagnetic partial sleeve 70 .
  • the magnetic field lines of the magnetic flux running through the air gap 92 between ferromagnetic sleeve 70 and armature 1 have only small field components in the direction of the armature stroke path and therefore only make a small contribution to the magnetic force F MO of the opening magnet 2 oriented in the armature stroke path direction.
  • the change in magnetic energy is essentially caused by the change in the magnetic resistance of the air gap between the end face 72 of the ferromagnetic sleeve 70 and armature 1 and by the change in the magnetic resistance of the air gap between the edges of the pin 11 and the recess 22. Because of the small size of these air gaps, the magnetic force F MO of the opening magnet 2 acting on the armature 1 is greater for large armature travel lengths d 0 than the magnetic force F MS of the closing magnet 3 with the same length of armature travel d S.
  • the geometric dimensions of the armature 1, the ferromagnetic partial sleeve 70 and the pole face of the opening magnet 2 are chosen such that the magnetic force-stroke characteristic curve F MO of the opening magnet 2 has a local maximum at maximum armature stroke path length d 0 , which is sufficiently large to allow for the To at least partially compensate for pressure force which acts on the gas exchange valve 5 at the time the armature 1 is released from the closing magnet 3 due to the internal gas pressure in the combustion chamber.
  • the damping of the spring-mass system formed from the armature 1, the tappet 4, the gas exchange valve 5, the actuating springs 60, 63 and the spring plates 61, 62 is approximately the same in both directions of movement of the armature 1, so that the Times within which the armature 1 is moved from one pole face 21 or 31 to the other pole face 31 or 21 are essentially the same for both directions of movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
EP99100674A 1998-02-04 1999-01-15 Vérin électromagnétique Withdrawn EP0935054A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19804225A DE19804225C1 (de) 1998-02-04 1998-02-04 Elektromagnetischer Aktuator
DE19804225 1998-02-04

Publications (2)

Publication Number Publication Date
EP0935054A2 true EP0935054A2 (fr) 1999-08-11
EP0935054A3 EP0935054A3 (fr) 1999-08-18

Family

ID=7856523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100674A Withdrawn EP0935054A3 (fr) 1998-02-04 1999-01-15 Vérin électromagnétique

Country Status (3)

Country Link
US (1) US6037851A (fr)
EP (1) EP0935054A3 (fr)
DE (1) DE19804225C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10029292B4 (de) * 2000-06-14 2005-08-04 Daimlerchrysler Ag Brennkraftmaschine mit elektromagnetischer Ventilsteuerung

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792109B1 (fr) * 1999-04-12 2001-06-01 Schneider Electric Sa Electroaimant a circuit magnetique simplifie
DE19922424C2 (de) * 1999-05-14 2003-04-30 Siemens Ag Elektromagnetischer Stellantrieb
DE19953788A1 (de) 1999-11-09 2001-05-10 Bosch Gmbh Robert Elektromagnetischer Aktuator
US20050076866A1 (en) * 2003-10-14 2005-04-14 Hopper Mark L. Electromechanical valve actuator
US7255073B2 (en) * 2003-10-14 2007-08-14 Visteon Global Technologies, Inc. Electromechanical valve actuator beginning of stroke damper
WO2005043266A2 (fr) * 2003-10-31 2005-05-12 Massachusetts Institute Of Technology Systemes et procedes de positionnement rapide a reluctance variable
US7305942B2 (en) * 2005-02-23 2007-12-11 Visteon Global Technologies, Inc. Electromechanical valve actuator
US7270093B2 (en) * 2005-04-19 2007-09-18 Len Development Services Corp. Internal combustion engine with electronic valve actuators and control system therefor
US8037853B2 (en) * 2005-04-19 2011-10-18 Len Development Services Usa, Llc Internal combustion engine with electronic valve actuators and control system therefor
EP1901655B1 (fr) * 2005-07-13 2018-12-19 Roche Diabetes Care GmbH Dispositif a lancette
US20160327176A1 (en) * 2014-01-21 2016-11-10 Honda Motor Co., Ltd. Electromagnetic actuator and solenoid-valve device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29604946U1 (de) 1996-03-16 1997-07-17 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Elektromagnetischer Aktuator für ein Gaswechselventil mit Ventilspielausgleich

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US2901210A (en) * 1953-06-29 1959-08-25 Phillips Petroleum Co Electro-magnetic device
US4361309A (en) * 1980-06-23 1982-11-30 Niipondenso Co., Ltd. Electromagnetic actuator
DE3223557A1 (de) * 1982-06-24 1983-12-29 Robert Bosch Gmbh, 7000 Stuttgart Elektrischer stellmotor
DE3826975A1 (de) * 1988-08-09 1990-02-15 Meyer Hans Wilhelm Stelleinrichtung fuer ein gaswechselventil
DE3826977A1 (de) * 1988-08-09 1990-02-15 Meyer Hans Wilhelm Stelleinrichtung fuer ein gaswechselventil einer brennkraftmaschine
DE3905023A1 (de) * 1989-02-18 1990-08-30 Voith Gmbh J M Elektromagnet mit einem tauchanker
US5074259A (en) * 1990-05-09 1991-12-24 Pavo Pusic Electrically operated cylinder valve
JP3186462B2 (ja) * 1994-09-22 2001-07-11 トヨタ自動車株式会社 内燃機関の電磁式弁駆動装置
JPH09317419A (ja) * 1996-05-28 1997-12-09 Toyota Motor Corp 吸排気用電磁駆動弁の異常検出方法
US5730091A (en) * 1996-11-12 1998-03-24 Ford Global Technologies, Inc. Soft landing electromechanically actuated engine valve
DE29620741U1 (de) * 1996-11-29 1998-03-26 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Schmalbauender elektromagnetischer Aktuator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29604946U1 (de) 1996-03-16 1997-07-17 FEV Motorentechnik GmbH & Co. KG, 52078 Aachen Elektromagnetischer Aktuator für ein Gaswechselventil mit Ventilspielausgleich

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10029292B4 (de) * 2000-06-14 2005-08-04 Daimlerchrysler Ag Brennkraftmaschine mit elektromagnetischer Ventilsteuerung

Also Published As

Publication number Publication date
US6037851A (en) 2000-03-14
EP0935054A3 (fr) 1999-08-18
DE19804225C1 (de) 1999-05-06

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