EP1450011A2 - Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator - Google Patents

Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator Download PDF

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Publication number
EP1450011A2
EP1450011A2 EP04300049A EP04300049A EP1450011A2 EP 1450011 A2 EP1450011 A2 EP 1450011A2 EP 04300049 A EP04300049 A EP 04300049A EP 04300049 A EP04300049 A EP 04300049A EP 1450011 A2 EP1450011 A2 EP 1450011A2
Authority
EP
European Patent Office
Prior art keywords
electromagnet
magnet
actuator
section
support
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
EP04300049A
Other languages
English (en)
French (fr)
Other versions
EP1450011A3 (de
EP1450011B1 (de
Inventor
Emmanuel Sedda
Christophe Fageon
Stéphane Guerin
Jean-Paul Yonnet
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles 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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1450011A2 publication Critical patent/EP1450011A2/de
Publication of EP1450011A3 publication Critical patent/EP1450011A3/de
Application granted granted Critical
Publication of EP1450011B1 publication Critical patent/EP1450011B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2132—Biasing means
    • F01L2009/2134—Helical springs
    • F01L2009/2136—Two opposed springs for intermediate resting position of the armature
    • 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
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2146—Latching means
    • F01L2009/2148—Latching means using permanent magnet
    • 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
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2151—Damping means

Definitions

  • the present invention relates to an actuator electromechanical valve control for combustion engine internal and to an internal combustion engine provided with such actuator.
  • An electromechanical actuator 100 (FIG. 1) of valve 110 includes mechanical means, such as springs 102 and 104, and electromagnetic means, such as electromagnets 106 and 108, to control the position of the valve 110 by means of electrical signals.
  • the tail of the valve 110 is applied against the rod 112 of a magnetic plate 114 located between the two electromagnets 106 and 108.
  • the simultaneous displacement of the rod 112 allows the spring 102 to place the valve 110 in the closed position, the head of the valve 110 coming against its seat 111 and preventing the gas exchanges between the inside and outside of the cylinder 117.
  • valve 110 alternates open positions or closed, called switched, with transient movements between these two positions. Thereafter, we will call “state switched” state of an open or closed valve.
  • the actuator 100 can be provided of magnets 118, located in the electromagnet 108, and 116, located in the electromagnet 106, intended to reduce energy necessary to maintain the tray 114 in a position switched.
  • each magnet is located between two sub-elements of the electromagnet with which it is associated so that its magnetic field, possibly combined with the field created by the electromagnet, strengthens the holding in the open or closed position of the valve. 110.
  • the magnet 116 is between two sub-elements 106 a and 106 b
  • electromagnet with polarized magnet or electromagnet requires significantly less of energy to control a valve, maintaining a valve in a switched position representing consumption significant energy for the actuator.
  • the present invention results from the observation that the actuator 100 has many drawbacks.
  • this actuator requires the use of two separate sub-elements 106a and 106b to form a electromagnet 106. Operations specific to manufacturing and storage of each of these sub-elements is therefore necessary, increasing the complexity and cost of manufacturing the actuator.
  • a new disadvantage lies in the difficulty of a possible replacement of a magnet 116 or 118. Indeed, it is necessary to disassemble the entire electromagnet 106 to replace a failed magnet 116.
  • the actuator 100 requires the use of a magnetic plate 114 of high mass due, in particular, to its large section Sp.
  • this section is generally equal to the section S e of the branches of the electromagnets to obtain optimal operation of the actuator, the branches of the support of the electromagnet and the plate forming a magnetic circuit of constant section.
  • actuator 100 requires springs high stiffness to move the large mass of the plate. Consequently, the sensitivity of the control exercised by the electromagnets on the plate by means of the current flowing in the coils is reduced, while the consumption required by the electromagnets to control the plate is increased.
  • springs of high stiffness causes, as a corollary, that these form, with the movable elements of the actuator 100, an oscillating device characterized by a switching delay substantially fixed by the stiffness k 102 and k 104 of the springs 102 and 104 and by the mass m d of the moving elements (plate 114, rod 112, movable mass of the springs 102 and 104, and valve 110).
  • the energy dissipated for example under the form of actuator operating noise due to impact of the plate on an electromagnet is generally increased by a increased mass of the plate. Now such an increase of energy dissipation causes energy efficiency weaker of the actuator.
  • the present invention remedies at least one of disadvantages mentioned above. It concerns an actuator electromechanical valve control for combustion engine internal including a magnet electromagnet and a plate mobile magnetic coming in the vicinity of the electromagnet, the magnet being located on a surface of the electromagnet opposite of the plate, characterized in that the electromagnet comprises an E-shaped magnetic circuit, and the magnet is located at the end of a branch of this E-shaped circuit
  • manufacture and assembly of a polarized electromagnet are easy since the magnet is fixed on the surface of this electromagnet while it is no longer necessary to use an electromagnet formed by several sub-elements, thus simplifying the manufacturing operations, logistics and assembly of the electromagnet.
  • this rod is external to the circuit at E.
  • different support branches are provided with a magnet.
  • At least one magnet is section above the branch section on which it is located.
  • the plate is of section lower than the section of the end branches of the support at E.
  • the section of a branch end of the support is less than half the cross section of the central branch of the support.
  • the section of the junction between an extreme branch of the support and the central branch of the support in E is less than half the section of the branch support center.
  • the invention also relates to a combustion engine internal including an electromechanical actuator for controlling valve fitted with a magnet electromagnet and a plate moving magnetic coming in the vicinity of the electromagnet.
  • the motor actuator conforms to one of the actuator embodiments described above.
  • FIG. 2 is shown an electromagnet 200 comprising three magnets 202, 204 and 206 located, in accordance with the invention, on the surface of the support 208 facing the actuator plate 210.
  • the magnets 202, 204 and 206 are located, respectively, on the central and extreme branches of the E-shaped support 208
  • the magnets are arranged according to their polarity so that their magnetic field strengthens the field magnetic created by the electromagnet 200 when the latter is active and attracts plateau 210.
  • the North Pole (N) of magnet 202 and the South poles (S) of magnets 204 and 206 are located towards the tray 210.
  • Such an electromagnet 200 therefore requires a support 208 E-shaped, conventionally used for actuators not polarized.
  • a magnet can be fixed to its support by gluing or overmolding.
  • the magnetization of the magnet can be realized after overmolding so as not to risk the demagnetization of the magnet during this overmolding.
  • the magnet can be in one piece ( Figure 9a) or formed by assembling small magnets 90 (FIG. 9b) juxtaposed.
  • Figure 9a when the magnet is conductive, which is the case with magnets rare earths, we reduce the intensity of the currents induced in the magnet during actuator operation, increasing thus the yield of the latter.
  • the magnet is composed of magnet powder and a binder. It then has a low resistivity which reduces the intensity of the currents induced during actuator operation.
  • FIG. 3 is shown a second electromagnet 300 such that a single magnet 302 is located at the surface of its support 304.
  • This support 304 can be machined so as to maintain a residual air gap between the magnet surface and the plate 310 when the latter comes into contact with the support, eliminating thus the shocks between the magnet 302 and the plate.
  • Such air gap, protecting the magnet, is all the more advantageous since the magnet is fragile, for example when it is made in earth rare.
  • the flux of the magnetic field generated by the electromagnet forms two symmetrical loops 306 joining in the central column 308.
  • the latter have a section S e equal to half of the section 2S c of the central column.
  • FIG. 4 is shown a third electromagnet 400, according to the invention, comprising a single central magnet 402 of section S a greater than the section S c of the magnetic circuit formed by the magnetic plate (not shown) and the branches of the support 404.
  • a third electromagnet 400 comprising a single central magnet 402 of section S a greater than the section S c of the magnetic circuit formed by the magnetic plate (not shown) and the branches of the support 404.
  • Such a magnet generates a stronger magnetic field than a smaller section magnet.
  • FIG. 5 is shown another variant of electromagnet 500 using a central magnet 502 of section S a greater than the section S c of the magnetic circuit.
  • This configuration makes it possible to increase the polarization flux created by the magnet, in particular in the plate (not shown) and in the end columns of the magnetic circuit.
  • low stiffness springs can be used to control a plateau of limited mass. Since then, electricity consumption is reduced.
  • control exerted on the plateau by the electromagnet by means of the field generated by a coil is increased since the control exerted by the springs is lowered in intensity.
  • Such an improvement in control allows, for example, to reduce the speed of impact of the plate on the electromagnet support.
  • the manufacturing cost of the tray is reduced while the size of the electromagnet is no longer imposed in height by the section of the magnet.
  • the magnetic plate has a section S p equal to this section S c of the magnetic circuit, as shown in FIG. 3.
  • the concentration of the flux makes it possible to obtain important magnetizations in the air gap with use magnets with weak remanent induction, for example ferrite or in composite materials.
  • the outer branch may have a cross section less than a third of the section of the central branch (or column).
  • a support 704 ensuring the maintenance of an air gap between the magnet 702 and the plate 710 when the latter comes into contact with the support.
  • the present invention is susceptible of numerous variants. In fact, it may be possible to saturate magnetically the plate, by reducing its section, if the action suffered by the plate is sufficient to ensure its maintenance against the electromagnet.
  • magnets 1001 and 1002 can be placed on a surface of the mobile controlled 1004 tray by the electromagnet 1006.
  • the use of the invention allows use an inlet valve actuator separate from a exhaust valve actuator.
  • an intake valve actuator conforming to the invention is more efficient for maintaining the valve cold than a conventional actuator thanks to the optimized action of the magnet on the set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP04300049A 2003-02-18 2004-01-27 Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator Expired - Lifetime EP1450011B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0301950A FR2851291B1 (fr) 2003-02-18 2003-02-18 Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
FR0301950 2003-02-18

Publications (3)

Publication Number Publication Date
EP1450011A2 true EP1450011A2 (de) 2004-08-25
EP1450011A3 EP1450011A3 (de) 2008-12-24
EP1450011B1 EP1450011B1 (de) 2010-05-26

Family

ID=32732017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300049A Expired - Lifetime EP1450011B1 (de) 2003-02-18 2004-01-27 Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator

Country Status (7)

Country Link
US (1) US7097150B2 (de)
EP (1) EP1450011B1 (de)
JP (1) JP4622261B2 (de)
AT (1) ATE469289T1 (de)
DE (1) DE602004027323D1 (de)
ES (1) ES2346436T3 (de)
FR (1) FR2851291B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4064934B2 (ja) * 2004-02-27 2008-03-19 三菱重工業株式会社 電磁弁装置
DE202004006156U1 (de) * 2004-04-19 2004-08-26 Bürkert Werke GmbH & Co. KG Magnetantrieb für ein Ventil
JP2006223081A (ja) * 2005-01-14 2006-08-24 Matsushita Electric Ind Co Ltd アクチュエータ構造およびそれを用いたアクチュエータブロック、ならびに電子機器
ATE382818T1 (de) * 2005-07-26 2008-01-15 Festo Ag & Co Elektromagnetventil
FR2894380B1 (fr) * 2005-12-02 2008-02-29 Valeo Sys Controle Moteur Sas Actionneur electromagnetique a aimants permanents disposes en v et a branche centrale en retrait.
US7900885B2 (en) * 2005-12-02 2011-03-08 Valeo Systemes De Controle Moteur Electromagnetic actuator with permanent magnets which are disposed in a V-shaped arrangement
FR2894377B1 (fr) * 2005-12-02 2008-05-16 Valeo Sys Controle Moteur Sas Actionneur electromagnetique avec deux electroaimants comportant des aimants de forces differentes, et procede de gestion d'une soupape de moteur a combustion interne faisant application.
US8066474B1 (en) 2006-06-16 2011-11-29 Jansen's Aircraft Systems Controls, Inc. Variable guide vane actuator
DE502007000822D1 (de) * 2006-10-23 2009-07-16 Pilz Auslandsbeteiligungen Gmb Zuhaltevorrichtung
DE102007050550A1 (de) * 2007-10-23 2009-04-30 Robert Bosch Gmbh Multipol-Magnetaktor
AT515114B1 (de) * 2014-09-23 2015-06-15 Seh Ltd Magnetvorrichtung umfassend Statoren und Translatoren
US10851907B2 (en) * 2015-11-09 2020-12-01 Husco Automotive Holdings Llc System and methods for an electromagnetic actuator
EP3220398A1 (de) 2016-03-17 2017-09-20 HUSCO Automotive Holdings LLC Systeme und verfahren für elektromagnetischen aktuator

Citations (1)

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EP1174595A1 (de) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Ventilaktuator in einer Brennkraftmaschine

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Also Published As

Publication number Publication date
DE602004027323D1 (de) 2010-07-08
ES2346436T3 (es) 2010-10-15
FR2851291B1 (fr) 2006-12-08
US20040217313A1 (en) 2004-11-04
JP2004286021A (ja) 2004-10-14
EP1450011A3 (de) 2008-12-24
JP4622261B2 (ja) 2011-02-02
EP1450011B1 (de) 2010-05-26
FR2851291A1 (fr) 2004-08-20
ATE469289T1 (de) 2010-06-15
US7097150B2 (en) 2006-08-29

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