EP1450011B1 - Actionneur électromécanique de commande de soupape pour moteur interne et moteur à combustion interne muni d'un tel actionneur - Google Patents

Actionneur électromécanique de commande de soupape pour moteur interne et moteur à combustion interne muni d'un tel actionneur Download PDF

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Publication number
EP1450011B1
EP1450011B1 EP04300049A EP04300049A EP1450011B1 EP 1450011 B1 EP1450011 B1 EP 1450011B1 EP 04300049 A EP04300049 A EP 04300049A EP 04300049 A EP04300049 A EP 04300049A EP 1450011 B1 EP1450011 B1 EP 1450011B1
Authority
EP
European Patent Office
Prior art keywords
electromagnet
magnet
actuator
section
plate
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 - Lifetime
Application number
EP04300049A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1450011A2 (fr
EP1450011A3 (fr
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/fr
Publication of EP1450011A3 publication Critical patent/EP1450011A3/fr
Application granted granted Critical
Publication of EP1450011B1 publication Critical patent/EP1450011B1/fr
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 electromechanical valve actuator for an internal combustion engine and to an internal combustion engine provided with such an actuator, as described in the document EP-1174595 for example.
  • An electromechanical actuator 100 ( figure 1 ) valve 110 includes mechanical means, such as springs 102 and 104, and electromagnetic means, such as electromagnets 106 and 108, for controlling 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 exchange of gas between the inside and the outside of the cylinder 117.
  • valve 110 alternates open or closed positions, said switched, with transient movements between these two positions. Thereafter, the term "switched state" the state of an open or closed valve.
  • the actuator 100 may be provided with magnets 118, located in the electromagnet 108, and 116, located in the electromagnet 106, for reducing the energy required to maintain the plate 114 in a switched position.
  • 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, reinforces the holding in the open or closed position of the valve 110.
  • the magnet 116 is located between two sub-elements 106 a and 106 b
  • magnet magnet or polarized electromagnet By virtue of the action of the magnet on the magnetic plate, such an electromagnet 106 or 108, referred to as magnet magnet or polarized electromagnet, requires substantially less energy to control a valve, maintaining a valve in a switched position representing a significant power consumption for the actuator.
  • the present invention results from the observation that the actuator 100 has many disadvantages.
  • this actuator requires the use of two separate sub-elements 106a and 106b to form an electromagnet 106. Operations specific to the manufacture and Storage of each of these sub-elements is therefore necessary, increasing the complexity and manufacturing cost of 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 defective magnet 116.
  • Another disadvantage is the large size that represents the actuator 100, in particular due to the fact that its height h is imposed by the section Sa of the magnets 116 and 118. In fact, this section Sa is important in order to obtain a magnetic flux raised from these magnets.
  • the actuator 100 requires the use of a magnetic tray 114 of high mass due, in particular, to its important section Sp.
  • this section is generally equal to the section S e of the branches of the electromagnets to obtain optimum operation of the actuator, the branches of the support of the electromagnet and the plate forming a magnetic circuit of constant section.
  • the actuator 100 requires high stiffness springs to move the large mass of the tray. Therefore, the sensitivity of the control exerted by the electromagnets on the plateau by means of the current flowing in the coils is reduced, while the consumption required by the electromagnets to control the plate is increased.
  • stiff springs causes, corollary, that they form, with the movable elements of the actuator 100, an oscillating device characterized by a switching time substantially fixed by the stiffness k 102 and 104 k springs 102 and 104 and the mass m d moving elements (plate 114, rod 112, movable mass of the springs 102 and 104, and valve 110).
  • the dissipated energy for example in the form of operating sound of the actuator, due to the impact of the plate on an electromagnet is generally increased by an increase in the mass of the plate.
  • an increase in the energy dissipation causes a lower energy efficiency of the actuator.
  • the present invention overcomes at least one of the disadvantages mentioned above. It relates to an electromechanical valve actuator for an internal combustion engine comprising a magnet electromagnet and a movable magnetic plate coming in the vicinity of the electromagnet, the magnet being situated on a surface of the electromagnet vis-à-vis 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.
  • the manufacture and assembly of a polarized electromagnet are easy since the magnet is attached to the surface of this electromagnet while it is no longer necessary to use an electromagnet formed by several sub-magnets. elements, thus simplifying the manufacturing, logistics and assembly operations of the electromagnet.
  • this rod is external to the circuit in E.
  • different support legs are provided with a magnet.
  • At least one magnet is of greater section than the section of the branch on which it is located.
  • the plate is of lower section than the section of the extreme branches of the support in E.
  • the section of an end branch of the support is less than half the section of the central branch of the support.
  • the section of the junction between an end branch of the support and the central branch of the support E is less than half the section of the central branch of the support.
  • the invention also relates to an internal combustion engine comprising an electromechanical valve actuator having a magnet electromagnet and a movable magnetic plate in the vicinity of the electromagnet.
  • the motor actuator is in accordance with one of the actuator embodiments described above.
  • an electromagnet 200 having three magnets 202, 204 and 206 located, according to the invention, on the surface of the support 208 vis-à-vis the plate 210 of the actuator.
  • the magnets 202, 204 and 206 are located, respectively, on the central and extreme branches of the support 208 in the shape of E.
  • the magnets are arranged according to their polarity so that their magnetic field strengthens the magnetic field created by the electromagnet 200 when the latter is active and attracts the plate 210.
  • the North Pole (N) of the magnet 202 and the South Poles (S) of the magnets 204 and 206 are located towards the plate 210.
  • Such an electromagnet 200 therefore requires an E-shaped support 208, conventionally used for non-polarized actuators.
  • a magnet can be fixed to its support by gluing or overmolding.
  • the magnetization of the magnet can be performed after overmoulding so as not to risk demagnetizing the magnet during overmolding.
  • the magnet can be in one piece ( figure 9a ) or formed by assembling small magnets 90 ( figure 9b ) juxtaposed.
  • the magnet when the magnet is conductive, which is the case with rare earth magnets, it reduces the intensity of the currents induced in the magnet during operation of the actuator, thereby increasing the efficiency of this magnet. latest.
  • 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 operation of the actuator.
  • FIG. 3 there is shown a second electromagnet 300 such that a single magnet 302 is located on the surface of its support 304.
  • This support 304 can be machined so as to maintain a residual gap e between the surface of the magnet and the plate 310 when the latter comes into contact with the support, thus eliminating shocks between the magnet 302 and the plate.
  • Such an air gap, protecting the magnet, is all the more advantageous as the magnet is fragile, for example when it is made of rare earths.
  • the flux of the magnetic field generated by the electromagnet forms two symmetrical 306 loops 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.
  • 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.
  • a magnet generates a larger magnetic field than a magnet of smaller section.
  • FIG. 5 Another variant of electromagnet 500 is shown using a central magnet 502 of section S which is larger 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 limited mass plateau. Therefore, we decrease the power consumption.
  • the control exerted on the plate 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 the control makes it possible, for example, to reduce the speed of impact of the plate on the support of the electromagnet.
  • the manufacturing cost of the plate 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. figure 3 .
  • the section of the extreme branches 606 of the support 602 can be reduced ( figure 6 ) an electromagnet 600 with magnet 604.
  • the concentration of the flux makes it possible to obtain significant magnetizations in the air gap with the use of low-remanent induction magnets, for example made of ferrite or composite materials.
  • the outer branch may have a section less than one third of the section of the central branch (or column).
  • the present invention is capable of many variants. In fact, it may be possible to saturate magnetically the tray, reducing its section, if the action undergone by the plate is sufficient to ensure its maintenance against the electromagnet.
  • magnets 1001 and 1002 may be arranged on a surface of the movable plate 1004 controlled by the electromagnet 1006.
  • the use of the invention makes it possible to use an inlet valve actuator separate from an exhaust valve actuator.
  • an intake valve actuator according to the invention is more efficient for maintaining the cold valve than a conventional actuator through the optimized action of the magnet on the plate.

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 Actionneur électromécanique de commande de soupape pour moteur interne et moteur à combustion interne muni d'un tel actionneur Expired - Lifetime EP1450011B1 (fr)

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 EP1450011A2 (fr) 2004-08-25
EP1450011A3 EP1450011A3 (fr) 2008-12-24
EP1450011B1 true EP1450011B1 (fr) 2010-05-26

Family

ID=32732017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300049A Expired - Lifetime EP1450011B1 (fr) 2003-02-18 2004-01-27 Actionneur électromécanique de commande de soupape pour moteur interne et moteur à combustion interne muni d'un tel actionneur

Country Status (7)

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

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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
DE502005002417D1 (de) * 2005-07-26 2008-02-14 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.
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.
JP5394068B2 (ja) * 2005-12-02 2014-01-22 ヴァレオ システム ドゥ コントロール モトゥール 永久磁石がｖ字形に配置された電磁アクチュエータ
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AT515114B1 (de) * 2014-09-23 2015-06-15 Seh Ltd Magnetvorrichtung umfassend Statoren und Translatoren
JP2017108612A (ja) * 2015-11-09 2017-06-15 フスコ オートモーティブ ホールディングス エル・エル・シーＨＵＳＣＯ Ａｕｔｏｍｏｔｉｖｅ Ｈｏｌｄｉｎｇｓ ＬＬＣ 電磁アクチュエータ用のシステムおよび方法
JP2017169433A (ja) 2016-03-17 2017-09-21 フスコ オートモーティブ ホールディングス エル・エル・シーＨＵＳＣＯ Ａｕｔｏｍｏｔｉｖｅ Ｈｏｌｄｉｎｇｓ ＬＬＣ 電磁アクチュエータのためのシステムおよび方法

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Also Published As

Publication number Publication date
ATE469289T1 (de) 2010-06-15
ES2346436T3 (es) 2010-10-15
JP2004286021A (ja) 2004-10-14
EP1450011A2 (fr) 2004-08-25
EP1450011A3 (fr) 2008-12-24
DE602004027323D1 (de) 2010-07-08
FR2851291A1 (fr) 2004-08-20
FR2851291B1 (fr) 2006-12-08
JP4622261B2 (ja) 2011-02-02
US7097150B2 (en) 2006-08-29
US20040217313A1 (en) 2004-11-04

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