EP0197356B1 - Elektromagnetisch arbeitende Stellvorrichtung - Google Patents

Elektromagnetisch arbeitende Stellvorrichtung Download PDF

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Publication number
EP0197356B1
EP0197356B1 EP86103468A EP86103468A EP0197356B1 EP 0197356 B1 EP0197356 B1 EP 0197356B1 EP 86103468 A EP86103468 A EP 86103468A EP 86103468 A EP86103468 A EP 86103468A EP 0197356 B1 EP0197356 B1 EP 0197356B1
Authority
EP
European Patent Office
Prior art keywords
valve
equilibrium
switching
coil
magnet
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
Application number
EP86103468A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0197356A2 (de
EP0197356A3 (en
Inventor
Andreas Fleck
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.)
Audi AG
Original Assignee
Andreas Fleck
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 Andreas Fleck filed Critical Andreas Fleck
Publication of EP0197356A2 publication Critical patent/EP0197356A2/de
Publication of EP0197356A3 publication Critical patent/EP0197356A3/de
Application granted granted Critical
Publication of EP0197356B1 publication Critical patent/EP0197356B1/de
Expired 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 actuating device according to the preamble of claim 1.
  • Such an actuator is known from DE-A-30 24 109.
  • the device described there relates to a gas exchange valve for an internal combustion engine, which is held in its open and closed positions by magnetic force, the magnets working against a spring system. Two opposite magnets each hold the gas exchange valve in a switching position, and when the magnets are not energized, the anchor plate of the gas exchange valve, on which the magnets act, is located centrally between the magnets.
  • the force of the magnets is not sufficient to move the control element against the spring force into one of the two switching positions with absolute reliability when it is switched on.
  • DE-A-30 24 109 therefore proposes that in addition to the two switching magnets that define the two switching positions, a clamping unit is provided, which in the embodiment shown there is also constructed as a magnet. If this control magnet is not energized, the armature plate of the switching element is not in the middle between the two magnets, but lies against the magnet that defines the closed position. When the actuating magnet is excited, an armature is drawn which defines a base point of the spring system, as a result of which the. Base point of the spring system and thus also the equilibrium position in the spring system is shifted.
  • This new equilibrium position by excitation of the actuating magnet is chosen so that the armature plate of the control element is located between the two switching magnets.
  • the actuating magnet is excited in order to shift the base point of the spring system, which defines the equilibrium position of the control element, so that the position of the When the switching magnet is de-energized, the armature plate is transferred from the system at which one switching magnet to the middle position between the two switching magnets.
  • FR-A-2 542 373 describes an actuating device for a gas exchange valve of an internal combustion engine which remains half open in the deenergized, de-energized state. It is expressly mentioned in this literature reference that separate shut-off elements must be provided for this reason. These shut-off elements are superfluous in the generic DE-A-30 24 109, since the non-energized tensioning device ensures a closed position of the gas exchange valve.
  • the spring system Since, at the same time, in order to achieve short control times, the spring system is of relatively rigid construction, the force to be applied in order to shift the base point of the spring system is relatively high. At the same time, the base must be shifted by at least half the stroke of the gas exchange valve. As a result, the space required for clamping devices is relatively high; when using an actuating magnet, it builds relatively large.
  • the object of the invention is to provide a generic device that is kept smaller in size.
  • the equilibrium position in the non-excited state does not correspond to one of the two switching positions, i. that is, in the equilibrium position in the non-excited state, the valve is not in its closed position.
  • the path of displacement which must be achieved by the clamping device, for example the adjusting magnet, is shorter than if the clamping device had to be adjusted from the closed position to the central position. Accordingly, the clamping device, for example the control magnet, since it does not have to cover such large distances, can be designed in smaller dimensions.
  • the switching magnet is first excited, which moves the valve into its one switching position, preferably into the closed position.
  • the valve is thus in a defined position, and the subsequent excitation of the actuating magnet transfers the point of equilibrium of the spring system from the eccentric position to the central position between the two. gene switching magnet, so that now a symmetrical movement of the valve between the two magnets can take place.
  • Subclaim 2 describes a preferred embodiment for the location of the equilibrium position of a gas exchange valve when the actuating magnet is not energized.
  • the single figure shows the detail from the engine block of an internal combustion engine, with the reference numeral 10 the cylinder head is designated.
  • An outlet channel 12 leads from the cylinder chamber 16, which can optionally be closed with an outlet valve 18, and an inlet channel 14 leads into the cylinder chamber 16, which can optionally be closed with an inlet valve 20.
  • the valves 18 and 20 are ge by an electromagnetic actuator controls, which is housed in a housing 22.
  • the unit housed in the housing 22 is identical for the inlet and outlet valves so that the variety of parts can be reduced.
  • a stem 24 leads out of the valve head 20 out of the cylinder head 10 and slides in a sleeve 26 in the cylinder head.
  • the end of the valve stem 24 is designated by the reference numeral 28, there it has a support on which a counter bearing 40 to be described later strikes.
  • a ring 30 is flanged circumferentially, which serves as an abutment for a spring system, which is composed of a large coil spring 32 and a small coil spring 34.
  • the two coil springs 32 and 34 run into one another coaxially, the opposite base 36 is a support in the cylinder head.
  • the valve stem 24 can be moved in the slide bearing 26 against the force of the spring system 32 and 34, the valve plate 20 then lifts from its seat and opens the outlet channel 14.
  • valve stem 24 The axial extension to the valve stem 24 forms a stem 38 of a control element, which has the counter bearing 40 at its lower end for contact with the valve stem 26.
  • annular anchor plate 46 which consists of ferromagnetic material, adjoins the shaft 38 of the control element.
  • a spring system consisting of a large coil spring 42 and a small coil spring 44 rests on the anchor plate, which likewise run coaxially with one another and coaxially with the shaft 38 of the control element.
  • This spring system 42 and 44 is formed by a support 48, which will be discussed later.
  • a magnetic core 68 which is U-shaped in cross section, is arranged in a ring, the axis of the ring coincides with the axis of the valve stem 24.
  • a coil 66 which is U-shaped in cross section, the magnetic core 68 in FIG Opened towards anchor plate 46.
  • the shaft 38 of the control element is surrounded by a similarly designed magnetic core 64 which carries a coil 62 in its interior.
  • the armature plate 46 moves, depending on the excitation of the magnet 62 or 66, from contact with the magnetic core 64 to contact with the magnetic core 68 and back.
  • an actuating magnet which consists of a magnetic core 58 and a coil 60.
  • a ferromagnetic element is attracted which is connected to a component 54.
  • This movement which is caused by the excitation of the coil 60 of the actuating magnet on the component 54, is transmitted via a mandrel 52, which is arranged in a closure cover 50, to the base point of the spring system, which is formed by the abutment 48, whereby the excitation of the Coil 60 of the solenoid of the base of the springs 42 and 44 is moved.
  • the effect of the actuating device is as follows: It is assumed that the entire system is de-energized and is at rest. This means that the coils 62 and 66 are not energized, and the coil 60 does not carry any current either.
  • the component 54 is thus in a position in which no force is exerted on the mandrel 50, the springs 42 and 44 are thus completely relaxed.
  • the counteracting springs 34 and 32 can also relax and the length of the springs is dimensioned such that the armature plate 46 is not located centrally between the magnetic cores 64 and 68.
  • the distance between the armature plate 46 and the magnetic core 64 is less than the distance between the armature plate 46 and the magnetic core 68. If the total travel of the armature plate 46 between the magnetic core 64 and the magnetic core 68 is approximately 7 mm, the distance between the magnetic core is in the relaxed position 64 and the anchor plate 46 approx. 2 mm.
  • the coil 62 is excited first and then the coil 60. Since the coil 62 is designed for faster switching times than the coil 60, both coils can also be excited at the same time.
  • the current flow through the coil 62 causes an attraction force to be exerted on the armature plate 46. Since the armature plate is approximately 2 mm away from the magnetic core 64, it is immediately moved by this attraction force against the force of the springs 42 and 44. Since the entire device is relaxed, the counterforce acting on the armature plate 46 by the springs 42 and 44 is not very strong in relation to the attractive force of the magnet 64.
  • the magnetic core 58 of the actuating magnet Due to the current flow through the coil 60, the magnetic core 58 of the actuating magnet is excited and attracts the armature 56, which transmits this movement in the direction of the open position of the valve 20 to the base point 48 of the spring system by transmission to the component 54 and via the mandrel 50. This also shifts the equilibrium point of the spring system in the direction of the open position of the valve 20, the path being chosen so that the equilibrium point of the spring system is now halfway between the armature plate 46 and the pole face of the magnetic core 64 for contact with the Magnetic core 68.
  • the actuating magnet 58 in a position to relatively large forces against the springs 42 and apply 44, however, since it has to produce only a static force during the working cycle, and no dynamic 'operations is subjected to not a very high current flow is then necessary .
  • the magnet builds relatively large. According to the invention, however, it is possible to limit the amount of force to be supplied by it, so that its size can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Magnetically Actuated Valves (AREA)
EP86103468A 1985-04-12 1986-03-14 Elektromagnetisch arbeitende Stellvorrichtung Expired EP0197356B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853513109 DE3513109A1 (de) 1985-04-12 1985-04-12 Elektromagnetisch arbeitende stellvorrichtung
DE3513109 1985-04-12

Publications (3)

Publication Number Publication Date
EP0197356A2 EP0197356A2 (de) 1986-10-15
EP0197356A3 EP0197356A3 (en) 1987-05-27
EP0197356B1 true EP0197356B1 (de) 1989-01-11

Family

ID=6267805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103468A Expired EP0197356B1 (de) 1985-04-12 1986-03-14 Elektromagnetisch arbeitende Stellvorrichtung

Country Status (6)

Country Link
US (1) US4715330A (es)
EP (1) EP0197356B1 (es)
JP (1) JPH0612052B2 (es)
CA (1) CA1275015A (es)
DE (2) DE3513109A1 (es)
ES (1) ES8703180A1 (es)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920976A1 (de) * 1989-06-27 1991-01-03 Fev Motorentech Gmbh & Co Kg Elektromagnetisch arbeitende stelleinrichtung
CA2087392C (en) * 1992-04-27 1998-10-27 Russell J. Vanrens Double solenoid valve actuator
US5354185A (en) * 1992-10-05 1994-10-11 Aura Systems, Inc. Electromagnetically actuated reciprocating compressor driver
US5352101A (en) * 1992-10-05 1994-10-04 Aura Systems, Inc. Electromagnetically actuated compressor valve
US6308690B1 (en) 1994-04-05 2001-10-30 Sturman Industries, Inc. Hydraulically controllable camless valve system adapted for an internal combustion engine
US5636601A (en) * 1994-06-15 1997-06-10 Honda Giken Kogyo Kabushiki Kaisha Energization control method, and electromagnetic control system in electromagnetic driving device
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
JP3106890B2 (ja) * 1995-01-11 2000-11-06 トヨタ自動車株式会社 内燃機関の弁駆動装置
US5638781A (en) 1995-05-17 1997-06-17 Sturman; Oded E. Hydraulic actuator for an internal combustion engine
DE19529152B4 (de) * 1995-08-08 2005-12-29 Fev Motorentechnik Gmbh Aus der Ruhelage selbstanziehender elektromagnetischer Aktuator
US5829396A (en) 1996-07-16 1998-11-03 Sturman Industries Hydraulically controlled intake/exhaust valve
US5645019A (en) * 1996-11-12 1997-07-08 Ford Global Technologies, Inc. Electromechanically actuated valve with soft landing and consistent seating force
US5730091A (en) * 1996-11-12 1998-03-24 Ford Global Technologies, Inc. Soft landing electromechanically actuated engine valve
US5692463A (en) * 1996-11-12 1997-12-02 Ford Global Technologies, Inc. Electromechanically actuated valve with multiple lifts
US5647311A (en) * 1996-11-12 1997-07-15 Ford Global Technologies, Inc. Electromechanically actuated valve with multiple lifts and soft landing
US5765513A (en) * 1996-11-12 1998-06-16 Ford Global Technologies, Inc. Electromechanically actuated valve
DE19733140A1 (de) * 1997-07-31 1999-02-04 Fev Motorentech Gmbh & Co Kg Verfahren zur Beeinflussung der Gemischbildung in Zylindern von Kolbenbrennkraftmaschinen durch Veränderung des Ventilhubs
DE19756095C2 (de) * 1997-12-17 2001-11-22 Telefunken Microelectron Vorrichtung zum Betrieb von Aktoren zur elektromagnetischen Ventilsteuerung bei Brennkraftmaschinen
DE19809175A1 (de) * 1998-03-04 1999-09-09 Schaeffler Waelzlager Ohg Brennkraftmaschine mit Magnetventileinrichtung
US6091314A (en) * 1998-06-05 2000-07-18 Siemens Automotive Corporation Piezoelectric booster for an electromagnetic actuator
JP3907835B2 (ja) * 1998-06-25 2007-04-18 日産自動車株式会社 車両用エンジンの動弁装置
US6009841A (en) * 1998-08-10 2000-01-04 Ford Global Technologies, Inc. Internal combustion engine having hybrid cylinder valve actuation system
EP1267568A1 (en) 2001-06-11 2002-12-18 STMicroelectronics Limited A method and circuitry for processing data
EP1271932A1 (en) 2001-06-11 2003-01-02 STMicroelectronics Limited A receiver
JP2003094987A (ja) * 2001-09-20 2003-04-03 Toyota Motor Corp エンジンおよび変速機の制御装置
US20080041467A1 (en) * 2006-08-16 2008-02-21 Eaton Corporation Digital control valve assembly for a hydraulic actuator
DE102016222280A1 (de) * 2016-11-14 2018-05-17 Man Diesel & Turbo Se Gaswechselventil für eine Brennkraftmaschine und Brennkraftmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3024109A1 (de) * 1980-06-27 1982-01-21 Pischinger, Franz, Prof. Dipl.-Ing. Dr.Techn., 5100 Aachen Elektromagnetisch arbeitende stelleinrichtung
JPS5738763A (en) * 1980-06-30 1982-03-03 Allied Chem Oxidation of primary amine to oxime by elementary oxygen
DE3307070C2 (de) * 1983-03-01 1985-11-28 FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen Stelleinrichtung für ein zwischen zwei Endstellungen verstellbares Schaltelement
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

Also Published As

Publication number Publication date
DE3513109C2 (es) 1989-03-30
DE3513109A1 (de) 1986-10-16
EP0197356A2 (de) 1986-10-15
ES553819A0 (es) 1987-02-16
US4715330A (en) 1987-12-29
DE3661755D1 (en) 1989-02-16
EP0197356A3 (en) 1987-05-27
CA1275015A (en) 1990-10-09
JPH0612052B2 (ja) 1994-02-16
JPS61237810A (ja) 1986-10-23
ES8703180A1 (es) 1987-02-16

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