EP0662697A1 - Verfahren zur Steuerung eines bistabilen elektromagnetischen Betätigers und Vorrichtung zur Durchfuhrung dieses Verfahrens - Google Patents

Verfahren zur Steuerung eines bistabilen elektromagnetischen Betätigers und Vorrichtung zur Durchfuhrung dieses Verfahrens Download PDF

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Publication number
EP0662697A1
EP0662697A1 EP94402896A EP94402896A EP0662697A1 EP 0662697 A1 EP0662697 A1 EP 0662697A1 EP 94402896 A EP94402896 A EP 94402896A EP 94402896 A EP94402896 A EP 94402896A EP 0662697 A1 EP0662697 A1 EP 0662697A1
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EP
European Patent Office
Prior art keywords
electromagnet
cut
armature
time
electromagnets
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
Application number
EP94402896A
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English (en)
French (fr)
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EP0662697B1 (de
Inventor
Nicolas Venuti
Jacques Beroff
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
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Automobiles Peugeot SA
Automobiles Citroen SA
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Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0662697A1 publication Critical patent/EP0662697A1/de
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Publication of EP0662697B1 publication Critical patent/EP0662697B1/de
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    • 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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • 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 a method for controlling a bistable electromagnetic actuator intended for example for controlling a valve of an internal combustion engine. It also relates to a control device and an actuator specially designed for the implementation of this method.
  • the actuators concerned are of the known type with two stable states respectively obtained by the excitation of the coil of two electromagnets (FIGS. 1 a to 1 c ) in the air gap of which a movable armature is arranged.
  • the time difference ⁇ T must be suitably chosen. If this time is too short, the energy accumulated by the movable armature can cause rebounds, if it is too large the capture may not take place.
  • the invention proposes to overcome the above drawbacks in a method for controlling an electromechanical actuator with two stable active positions and a rest position, actuator of the type comprising a movable armature linked to a member to be actuated, for example a valve of an internal combustion engine, this armature being arranged, in the air gap separating first and second identical electromagnets placed opposite, equidistant at rest from the two electro -magnets thanks to the opposite return forces of two identical springs, process in which the switching from one to the other active position is carried out by controlling the excitation of the second electromagnet when a time ⁇ T, predetermined for the normal operating conditions, has elapsed since the command to cut off the excitation current of the first electromagnet and vice versa.
  • the breaking of the excitation current of the second electromagnet is controlled during the passage of the movable armature by a reference position which advantageously corresponds to the rest position of the armature.
  • the duration of the cut is calculated as a function of the elapsed time T C - T P between the instant T C of the start of the cut and the instant T P of the normal end of the previous command.
  • the duration ⁇ T C of the cut-off is an increasing function of the elapsed time T C - T P.
  • a device for implementing the method according to the invention is of the type comprising an electromechanical actuator, with two stable active positions and a rest position, the movable armature of which is linked to a member to be actuated is disposed in the air gap of two identical electromagnets placed opposite one another in a housing and means for switching the control currents of the electromagnets, and is characterized in that it comprises means for generating and delivering to the switching means a signal during the passage of the movable frame to a predetermined position of its travel.
  • the means for generating and delivering the signal comprise a position sensor linked to the actuator housing which can advantageously be arranged, to detect the passage of the movable armature, equidistant from the two electromagnets.
  • FIGS. 1 a , 1 b and 1 c A known electromechanical actuator with two stable positions and a rest position is shown in FIGS. 1 a , 1 b and 1 c and designated by the general reference 1.
  • a movable frame 3 consisting of a plate made of magnetic sheet is placed in the air gap e comprised between the two electromagnets arranged opposite.
  • Two identical helical springs 31 and 32 are arranged along the axis XX of the actuator on either side of the plate 3 so as to keep it at rest, that is to say when none of the coils is excited, equidistant from the two electromagnets ( Figure 1a).
  • the rod 5 disposed axially and fixed to the center of the plate 3 is connected to the member to be controlled, not shown.
  • Figure 1b shows a first stable position obtained when the coil 21 of the electromagnet 11 is energized while the coil 22 of the electromagnet 12 is not.
  • the armature 3 is in this case bonded to the armature of the electromagnet 11.
  • FIG. 1 c shows the second stable position obtained when the coil 22 is energized while the coil 21 is not.
  • the armature 3 is in this case bonded to the armature of the electromagnet 12.
  • the method usually used for switching from the first stable position to the second stable position will now be described with reference to FIGS. 2 a to 2 d .
  • the first position of the armature 3 is represented from O to T1 by the ordinate P1 and the second position by the ordinate P2 reached at time T2 .
  • the current control signals in the coils 21 and 22 are designated respectively by A1 and A2 . At state 1 of these signals the corresponding coil is energized.
  • the current of the coil 21 is first cut by passing the sienal A1 from state 1 to state O.
  • a certain time ⁇ T after this cut-off the current I of the coil 22 is controlled by passing the signal A2 from state O to state 1 and the charge of the coil 22 changes as shown in FIG. 2 d .
  • the time difference ⁇ T must be suitably chosen to avoid non-sticking of the armature (FIG. 3 a ), if the magnetic energy is insufficient, or rebounds ( Figure 3b ), if there is excess energy.
  • the operating conditions linked to the vehicle cause variations in the inrush current shown in FIG. 2 d , for example during a start-up at cold and / or if the battery charge is not optimal.
  • the procedure is to remedy these drawbacks in the manner which will be explained below with reference to FIGS. 5 a to 5 e .
  • the origin of the abscissa represents the instant when the coil of the electromagnet corresponding to the stable state previously produced is de-energized by passage of the corresponding control signal from state 1 to state O to l 'instant T P.
  • the control of the excitation of the other electromagnet is advanced with respect to the predetermined time ⁇ t (FIG. 5 b ) for optimal operation under normal conditions, as already explained, at time T a (FIG. 5 c ) .
  • the excitation current of this electromagnet is then cut at an instant T c determined by the displacement of the movable armature 3, for example during its passage through a point P R intermediate of its stroke from P1 to P2 (figure 5 a ).
  • the excitation current is then restored after a cut-off duration calculated as a function of the movement of the armature 3, for example as a function of the time elapsed between the cut at T P and the passage of the armature 3 through the reference position. P R.
  • the reference position P R will preferably be chosen equidistant from the two electromagnets and more generally it will correspond to the rest position of the movable frame 3 ( Figure 1 a ).
  • the duration of the cutoff as a function of the speed of movement of the armature 3 is determined experimentally as a function of the operating characteristics of the member to be controlled.
  • ⁇ T C will be an increasing function of T c - T P.
  • the magnetic force is thus properly metered to avoid rebounds of the plate 3 while leaving a sufficient margin to compensate for disturbances in the movement of the plate.
  • I nit is the time which elapses between the end of the command of the previously excited coil and the moment when the plate 3 actually takes off from the magnetic circuit of this coil.
  • the device (FIG. 4) comprises an actuator 1 of the type described above and further comprising a position sensor 6 capable of emitting an electrical signal when the armature 3 passes to its rest position.
  • a control system 7 receives, in addition to the usual information for example from the control electronics of a motor to internal combustion, the actuator 1 of which controls a valve, the signal emitted by the sensor 6 when the frame 3 passes.
  • the system 7 produces the logic signals A1 and A2 controlling the coils 21 and 22 respectively, by means of a power stage 8.
  • the end of command A1 of the previously energized coil must first be identified, for example by carrying out edge detection.
  • the instant T P thus identified is chosen as the origin.
  • An up-down counter is then initialized to the value Init and then counted down, when the counter reaches zero, up to the time T C of passage of the plate 3 in front of the detector 6 is counted using a first clock.
  • T C - T P - Init at the output of the up-down counter.
  • the start of the dip is simultaneously triggered at time T C and a countdown is then made with a second clock.
  • the senor 6 is inserted into the outer wall of the housing 10 equidistant from the armatures of the coils 11 and 12.
  • a valve V and its seat S are shown in the intermediate position corresponding to the state of rest of the actuator.
  • the valve stem coincides with the rod 5 driven by the movable frame 3.
  • the equilibrium position P1 corresponds to the closed valve and the position P2 when it is fully open.
  • the springs 31 and 32 bear respectively, by their end opposite the plate 3, on the housing 10 and on the cylinder head C of the engine.
  • the actuator comprises, in the usual way, means for adjusting the closed position of the valve V resting on its seat S.
  • These means may include shims or washers 102 arranged under the flange 101 of the housing 10 before fixing to the cylinder head C by screws such as 103. It also usually comprises means for adjusting the zero position corresponding to the state of rest.
  • These means can be constituted by a screw 104 cooperating with a corresponding tapping of the housing 10 and on which the end of the spring 31 opposite the plate 3 bears. The axial displacement of the support formed by the screw 104 thus makes it possible to adjust the plate 3 rest position. After adjustment, the screw 104 is locked by a lock nut 105.
  • the senor 6 is centered in a bore of a cylindrical spacer 106 which determines the width of the air gap e between the armatures of the electromagnets 11,12, this air gap defining the total stroke of the plate 3 between its two extreme stable positions P1, P2 .

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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)
  • Magnetically Actuated Valves (AREA)
EP94402896A 1994-01-07 1994-12-15 Verfahren zur Steuerung eines bistabilen elektromagnetischen Stellgliedes und Vorrichtung zur Durchführung dieses Verfahrens Expired - Lifetime EP0662697B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400103A FR2714998B1 (fr) 1994-01-07 1994-01-07 Procédé de commande d'un actionneur électromagnétique bistable et dispositif pour sa mise en Óoeuvre.
FR9400103 1994-01-07

Publications (2)

Publication Number Publication Date
EP0662697A1 true EP0662697A1 (de) 1995-07-12
EP0662697B1 EP0662697B1 (de) 1998-04-08

Family

ID=9458825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402896A Expired - Lifetime EP0662697B1 (de) 1994-01-07 1994-12-15 Verfahren zur Steuerung eines bistabilen elektromagnetischen Stellgliedes und Vorrichtung zur Durchführung dieses Verfahrens

Country Status (3)

Country Link
EP (1) EP0662697B1 (de)
DE (1) DE69409485T2 (de)
FR (1) FR2714998B1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870905A1 (de) * 1997-04-08 1998-10-14 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Stromsteuerverfahren für ein elektromagnetisch betätigtes Hubventil
DE19741570A1 (de) * 1997-09-20 1999-03-25 Heinz Leiber Elektromagnetische Stelleinrichtung
EP0916814A3 (de) * 1997-11-12 1999-07-07 Fuji Jukogyo Kabushiki Kaisha Vorrichtung und Verfahren zur Steuerung eines elektromagnetischen Ventils
FR2778786A1 (fr) * 1998-05-14 1999-11-19 Daimler Chrysler Ag Procede et dispositif pour la commande electromagnetique d'une soupape
DE19832196A1 (de) * 1998-07-17 2000-01-20 Bayerische Motoren Werke Ag Verfahren zur Reduzierung der Auftreffgeschwindigkeit eines Ankers eines elektromagnetischen Aktuators
DE19832198A1 (de) * 1998-07-17 2000-01-20 Bayerische Motoren Werke Ag Regelungsverfahren für die Endphasen-Bewegung eines Ankers eines elektromagnetischen Aktuators
FR2799302A1 (fr) * 1999-10-04 2001-04-06 Peugeot Citroen Automobiles Sa Actionneur electrique notamment pour soupape de moteur de vehicule automobile
US6292345B1 (en) 1998-09-02 2001-09-18 Siemens Aktiengesellschaft Method for controlling an electromechanical actuator
EP1014395A3 (de) * 1998-12-24 2001-11-14 DaimlerChrysler AG Verfahren und Vorrichtung zum Vermindern der Geräuschentwicklung bei elektromagnetisch betätigten Vorrichtungen
EP1411212A3 (de) * 2002-10-17 2004-04-28 Bayerische Motoren Werke Aktiengesellschaft Elektromagnetische Ventiltriebvorrichtung mit verdrehgesicherter Neutrallagenverstellschraube
DE19836586B4 (de) * 1997-08-12 2010-07-15 Toyota Jidosha Kabushiki Kaisha, Toyota-shi Hydraulisches Bremssystem für ein Kraftfahrzeug, mit einem druckgesteuerten Sitzventil, dessen Aufsetzgeschwindigkeit zur Abschwächung des Aufpralls durch eine Steuer- bzw. Regeleinrichtung vermindert wird

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739840C2 (de) * 1997-09-11 2002-11-28 Daimler Chrysler Ag Verfahren zur Steuerung einer elektromagnetisch betätigbaren Stellvorrichtung, insbesondere eines Ventils für Brennkraftmaschinen
WO2000009867A1 (de) 1998-08-13 2000-02-24 Siemens Aktiengesellschaft Einrichtung zum steuern eines stellgeräts
FR2796752B1 (fr) 1999-07-23 2001-10-19 Peugeot Citroen Automobiles Sa Dispositif de controle et de limitation d'impact pour un actionneur electromecanique
FR2870563B1 (fr) 2004-05-19 2006-06-30 Peugeot Citroen Automobiles Sa Dispositif d'actionnement de soupapes
DE102012023052A1 (de) * 2012-11-26 2014-05-28 Volkswagen Aktiengesellschaft Aktor und Ventiltrieb für einen Verbrennungsmotor
DE102019104882A1 (de) * 2019-02-26 2020-08-27 Eto Magnetic Gmbh Aktorvorrichtung und Verfahren zum Betrieb einer Aktorvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307683C1 (de) * 1983-03-04 1984-07-26 Klöckner, Wolfgang, Dr., 8033 Krailling Verfahren zum Aktivieren einer elektromagnetisch arbeitenden Stelleinrichtung sowie Vorrichtung zum Durchfuehren des Verfahrens
US4547087A (en) * 1983-01-20 1985-10-15 Siemens Aktiengesellschaft Microprocessor-controlled printing mechanism having an opto-electronic sensor
EP0376716A1 (de) * 1988-12-28 1990-07-04 Isuzu Motors Limited Vorrichtung zur Steuerung eines elektromagnetisch angetriebenen Ventils
WO1992002712A1 (en) * 1990-07-27 1992-02-20 Keith Leslie Richards A valve control arrangement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547087A (en) * 1983-01-20 1985-10-15 Siemens Aktiengesellschaft Microprocessor-controlled printing mechanism having an opto-electronic sensor
DE3307683C1 (de) * 1983-03-04 1984-07-26 Klöckner, Wolfgang, Dr., 8033 Krailling Verfahren zum Aktivieren einer elektromagnetisch arbeitenden Stelleinrichtung sowie Vorrichtung zum Durchfuehren des Verfahrens
EP0376716A1 (de) * 1988-12-28 1990-07-04 Isuzu Motors Limited Vorrichtung zur Steuerung eines elektromagnetisch angetriebenen Ventils
WO1992002712A1 (en) * 1990-07-27 1992-02-20 Keith Leslie Richards A valve control arrangement

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870905A1 (de) * 1997-04-08 1998-10-14 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Stromsteuerverfahren für ein elektromagnetisch betätigtes Hubventil
DE19836586B4 (de) * 1997-08-12 2010-07-15 Toyota Jidosha Kabushiki Kaisha, Toyota-shi Hydraulisches Bremssystem für ein Kraftfahrzeug, mit einem druckgesteuerten Sitzventil, dessen Aufsetzgeschwindigkeit zur Abschwächung des Aufpralls durch eine Steuer- bzw. Regeleinrichtung vermindert wird
DE19741570A1 (de) * 1997-09-20 1999-03-25 Heinz Leiber Elektromagnetische Stelleinrichtung
EP0916814A3 (de) * 1997-11-12 1999-07-07 Fuji Jukogyo Kabushiki Kaisha Vorrichtung und Verfahren zur Steuerung eines elektromagnetischen Ventils
US6158715A (en) * 1998-05-14 2000-12-12 Daimlerchrysler Ag Method and arrangement for the electromagnetic control of a valve
FR2778786A1 (fr) * 1998-05-14 1999-11-19 Daimler Chrysler Ag Procede et dispositif pour la commande electromagnetique d'une soupape
DE19821548A1 (de) * 1998-05-14 1999-11-25 Daimler Chrysler Ag Verfahren und Vorrichtung zur elektromagnetischen Steuerung eines Ventils
DE19821548C2 (de) * 1998-05-14 2000-05-31 Daimler Chrysler Ag Verfahren und Vorrichtung zur Steuerung eines elektromagnetischen Ventils
DE19832198A1 (de) * 1998-07-17 2000-01-20 Bayerische Motoren Werke Ag Regelungsverfahren für die Endphasen-Bewegung eines Ankers eines elektromagnetischen Aktuators
DE19832196A1 (de) * 1998-07-17 2000-01-20 Bayerische Motoren Werke Ag Verfahren zur Reduzierung der Auftreffgeschwindigkeit eines Ankers eines elektromagnetischen Aktuators
US6292345B1 (en) 1998-09-02 2001-09-18 Siemens Aktiengesellschaft Method for controlling an electromechanical actuator
EP1014395A3 (de) * 1998-12-24 2001-11-14 DaimlerChrysler AG Verfahren und Vorrichtung zum Vermindern der Geräuschentwicklung bei elektromagnetisch betätigten Vorrichtungen
FR2799302A1 (fr) * 1999-10-04 2001-04-06 Peugeot Citroen Automobiles Sa Actionneur electrique notamment pour soupape de moteur de vehicule automobile
EP1091368A1 (de) * 1999-10-04 2001-04-11 Peugeot Citroen Automobiles SA Elektrische Betätigungsvorrichtung, insbesondere für ein Fahrzeugmotorventil
EP1411212A3 (de) * 2002-10-17 2004-04-28 Bayerische Motoren Werke Aktiengesellschaft Elektromagnetische Ventiltriebvorrichtung mit verdrehgesicherter Neutrallagenverstellschraube

Also Published As

Publication number Publication date
FR2714998A1 (fr) 1995-07-13
FR2714998B1 (fr) 1996-02-09
DE69409485T2 (de) 1998-09-17
EP0662697B1 (de) 1998-04-08
DE69409485D1 (de) 1998-05-14

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