EP0419352A1 - Elektromagnetventil mit Dauermagnet - Google Patents

Elektromagnetventil mit Dauermagnet Download PDF

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Publication number
EP0419352A1
EP0419352A1 EP90402585A EP90402585A EP0419352A1 EP 0419352 A1 EP0419352 A1 EP 0419352A1 EP 90402585 A EP90402585 A EP 90402585A EP 90402585 A EP90402585 A EP 90402585A EP 0419352 A1 EP0419352 A1 EP 0419352A1
Authority
EP
European Patent Office
Prior art keywords
permanent magnet
electromagnet
core
solenoid valve
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.)
Granted
Application number
EP90402585A
Other languages
English (en)
French (fr)
Other versions
EP0419352B1 (de
Inventor
Roger Labouesse
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.)
Solex SA
Original Assignee
Solex SA
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 Solex SA filed Critical Solex SA
Publication of EP0419352A1 publication Critical patent/EP0419352A1/de
Application granted granted Critical
Publication of EP0419352B1 publication Critical patent/EP0419352B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets

Definitions

  • the invention relates to solenoid valves, of the type comprising, on the one hand, a housing containing an electromagnet with control winding, in which a passage limited by a seat for receiving a shutter is provided, and, on the other hand, a moving element in the housing, comprising the shutter and a permanent magnet, movable between a first position towards which it is attracted by the magnet and another position towards which it is attracted by the electromagnet when the winding is supplied , one of the positions being defined by the support of the shutter on the seat.
  • solenoid valves of this type find an important, although not exclusive, application in the fuel supply installations of internal combustion engines.
  • the position in which the shutter releases the seat is defined by the support of the permanent magnet against the carcass or the soft iron core of the electromagnet.
  • the invention aims to provide a solenoid valve that better meets those previously known to the requirements of practice, in particular in that it makes it possible to give the force acting on the shutter a value which is certain to avoid leaks and, in advantageous embodiments, reduces the variation of the forces exerted on the crew, as a function of the position of the shutter, in comparison with the existing solenoid valves with magnetic return.
  • the invention also makes it possible to produce a solenoid valve in which the forces exerted on the movable assembly are maximum when the latter occupies one or the other of the extreme positions which it must take in normal operation.
  • the invention provides in particular a solenoid valve according to claim 1.
  • the spacer can be fixed to the core and the permanent magnet or simply have a stop connection with them, which facilitates the construction of the solenoid valve.
  • the solenoid valve shown in Figures 1 to 3 is of the type closed at rest, that is to say comprising a shutter resting on its seat when the solenoid valve is not supplied with electric current.
  • This solenoid valve comprises a housing 10 of generally cylindrical shape, made of non-magnetic material, the front part of which, of reduced diameter, is threaded to allow the housing to be fixed by screwing in a foundry body 12.
  • channels 16 and 18 which communicate via a passage defined by a seat 20 in the front part of the housing.
  • a seat 20 in the front part of the housing.
  • a groove for receiving an O-ring 22 intended to suppress communications between the channels 16 and 18 other than through the passage.
  • a space provided inside the housing contains a tubular support 23 of plastic material carrying the coil 24 of an electromagnet also comprising a fixed soft iron carcass 26, of annular shape.
  • the ends of the winding are connected to pins 28 and 30 for connection with a DC excitation circuit (not shown), placed at the rear of the housing 10.
  • a crew, mobile to and from the seat 20, comprises a shutter 32 movable between a rest position where it rests on the seat 20 (Figure 1) and an active position where it is moved away from it ( Figure 2).
  • the shutter is fixed, for example by fitting, on a soft iron core 34, which tends to pass from the rest position (shutter closed position) to the active position (shutter open position where it is shown in Figure 2) under the action of electromagnetic forces exerted by the electromagnet when the winding 24 is supplied regardless of the direction of current flow.
  • a permanent magnet 36 with axial magnetization, is placed at the rear of the electromagnet and mechanically coupled to the core 34 by a rod 38, constituting a spacer. The spacer rod slides in the central passage of the annular carcass of soft iron 26.
  • the spacer has a simple abutment support on the core 34 and the magnet 36. But it could be fixed to one and / or the other of these elements .
  • the length of the spacer 38 is such that, when the shutter is in abutment on its seat, an air gap e remains between the facing faces of the carcass 26 and of the permanent magnet 36, to avoid sticking d9 to l residual magnetization of the carcass.
  • a cover 40 placed at the rear of the housing limits the recoil of the magnet 36 so that an air gap still remains between the carcass 26 and the core 34, both made of soft iron, when the winding 24 is powered.
  • Air circulation clearances are provided in the housing so that the movements of the mobile assembly are not hampered by the variation in volume of the chambers delimited by fixed and mobile parts.
  • the permanent magnet 36 tends to be applied against the soft iron carcass 26 and maintains the shutter 32 on its seat 20, the force exerted by the magnet being transmitted by the spacer 38 and the core 34.
  • the electromagnetic force exerted on the core 34 can be maximum when the crew is in the fully open position, which reduces the risk of separation of the core, for example under the action of shocks or vibrations.
  • a solenoid valve according to the invention can also be constituted so as to be open, and not closed, at rest.
  • Figure 4 shows a solenoid valve with the same general constitution as that of Figure 1, except that the magnet 36 a is integral with the shutter 32 while the soft iron core 34 a is placed at the rear of the electromagnet.
  • the core 34 a and the spacer 38 have a length such that a gap e of a few tenths of a millimeter remains between the permanent magnet 36 a and the soft iron carcass 26 when the core 34 a is pressed against the cover 40 .
  • the DC power source for the winding 24 has a polarity such that at the end of the carcass 26 opposite the permanent magnet 36a, a pole of the same nature is formed as that which is opposite. For example, in the case illustrated in FIG. 4, where the permanent magnet 36 a has a south pole facing the carcass 26, the direction of the current in the coil 24 must be such that a south pole is formed opposite the permanent magnet 36 a .
  • the force exerted by the core 34 a is still maximum when the moving element reaches the position towards which the core drives it. To this force is added that due to the repulsion between poles of the same name of the carcass 26 and the permanent magnet 36 a . To a certain extent, the progressive increase in the force exerted by the core 34 a as the air gap is reduced compensates for the progressive reduction in the repulsive force which is exerted on the permanent magnet 36 a .
  • the invention is susceptible of numerous variant embodiments.
  • the soft iron core, or a ferromagnetic material having similar properties, and the permanent magnet could have different forms from those which have been represented and could in particular have the same form.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
EP19900402585 1989-09-22 1990-09-19 Elektromagnetventil mit Dauermagnet Expired - Lifetime EP0419352B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912487 1989-09-22
FR8912487A FR2652402B1 (fr) 1989-09-22 1989-09-22 Electrovanne a aimant permanent.

Publications (2)

Publication Number Publication Date
EP0419352A1 true EP0419352A1 (de) 1991-03-27
EP0419352B1 EP0419352B1 (de) 1994-03-30

Family

ID=9385773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900402585 Expired - Lifetime EP0419352B1 (de) 1989-09-22 1990-09-19 Elektromagnetventil mit Dauermagnet

Country Status (4)

Country Link
EP (1) EP0419352B1 (de)
BR (1) BR9004843A (de)
DE (1) DE69007725T2 (de)
FR (1) FR2652402B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762363A1 (fr) * 1997-04-17 1998-10-23 Daimler Benz Ag Soupape a commande electromagnetique
EP0955645A3 (de) * 1998-05-06 2000-08-16 O.M.T. Officine Meccaniche Torino S.p.A. Ultraschneller Elektromagnetantrieb ohne Feder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2140034C1 (ru) * 1998-07-22 1999-10-20 Собянин Виталий Григорьевич Электродинамический привод клапанов
CN108019553A (zh) * 2018-01-12 2018-05-11 西华大学 一种电磁空气阀

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1267924B (de) * 1966-11-05 1968-05-09 Erich Herion Elektromagnetisch durch einen Impuls betaetigbares Ventil
DE2826212A1 (de) * 1977-06-18 1979-03-22 Hart J C H Betaetigungsvorrichtung
EP0333452A2 (de) * 1988-03-16 1989-09-20 Eaton S.A.M. Zweistellungsventil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61144005A (ja) * 1984-12-17 1986-07-01 Shinichi Watanabe ストロ−ク調整出来る自己保持型両引きソレノイド

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1267924B (de) * 1966-11-05 1968-05-09 Erich Herion Elektromagnetisch durch einen Impuls betaetigbares Ventil
DE2826212A1 (de) * 1977-06-18 1979-03-22 Hart J C H Betaetigungsvorrichtung
EP0333452A2 (de) * 1988-03-16 1989-09-20 Eaton S.A.M. Zweistellungsventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 340 (E-455)(2396) 18 novembre 1986, & JP-A-61 144005 (SHINICHI WATANABE) 01 juillet 1986, *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762363A1 (fr) * 1997-04-17 1998-10-23 Daimler Benz Ag Soupape a commande electromagnetique
US6068236A (en) * 1997-04-17 2000-05-30 Daimlerchrysler Ag Electromagnetically operable valve
EP0955645A3 (de) * 1998-05-06 2000-08-16 O.M.T. Officine Meccaniche Torino S.p.A. Ultraschneller Elektromagnetantrieb ohne Feder

Also Published As

Publication number Publication date
FR2652402A1 (fr) 1991-03-29
EP0419352B1 (de) 1994-03-30
FR2652402B1 (fr) 1992-01-24
DE69007725D1 (de) 1994-05-05
BR9004843A (pt) 1991-09-10
DE69007725T2 (de) 1994-07-14

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