EP1450012A1 - Elektromechanische Ventilbetätigungsvorrichtung für Brennkraftmaschine und Brennkraftmaschine mit dieser Ventilbetätigungsvorrichtung - Google Patents

Elektromechanische Ventilbetätigungsvorrichtung für Brennkraftmaschine und Brennkraftmaschine mit dieser Ventilbetätigungsvorrichtung Download PDF

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Publication number
EP1450012A1
EP1450012A1 EP04300050A EP04300050A EP1450012A1 EP 1450012 A1 EP1450012 A1 EP 1450012A1 EP 04300050 A EP04300050 A EP 04300050A EP 04300050 A EP04300050 A EP 04300050A EP 1450012 A1 EP1450012 A1 EP 1450012A1
Authority
EP
European Patent Office
Prior art keywords
electromagnet
plate
current
actuator
switching
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
EP04300050A
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English (en)
French (fr)
Other versions
EP1450012B1 (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 EP1450012A1 publication Critical patent/EP1450012A1/de
Application granted granted Critical
Publication of EP1450012B1 publication Critical patent/EP1450012B1/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
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism

Definitions

  • the present invention relates to an actuator electromechanical valve for internal combustion engine and to an internal combustion engine fitted with such an 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.
  • valve 110 When the electromechanical actuator 100 is operating correctly, the valve 110 alternates open positions or closed fixed, called switched, with displacements transients between these two positions. Then we will denote “switched state” the state of an open valve or closed.
  • the springs 102 and 104 form, with the elements actuator 100, a oscillating device characterized by a valve switching delay.
  • the switching delay is essentially a function of these stiffnesses k 102 and k 104 and of this mass m.
  • the switching delay ⁇ t c is substantially fixed by the square root of the ratio k / m.
  • the switching delay is short sensitive to variations in the current flowing in the coils 107 and 106 of the electromagnets.
  • the actuator 100 can be provided of magnets 118 (electromagnet 108) and 116 (electromagnet 106) intended to reduce the energy required to maintain the platform 114 in a switched position.
  • electromagnet 106 or 108 with magnet such a polarized electromagnet is called electromagnet 106 or 108 with magnet.
  • the present invention results from the observation that the optimal switching time for a valve varies depending on the engine operation.
  • the present invention also results from the observation that the use of a polarized actuator makes it possible to control a magnetic plate with increased sensitivity compared to a non-polarized actuator, as shown above using Figure 2.
  • the force F exercised by a non-polarized actuator is doubly non linear, i.e. proportional to the square of the intensity of current supplying the electromagnet and vice versa proportional to the square of the air gap.
  • the reduction in the force exerted by the polarized electromagnet, for a weak air gap decreases the intensity of the acceleration undergone by the plateau and therefore its impact speed against the plate, thereby reducing the noise generated by the latter.
  • control of the force exerted on the plate is easier with a polarized actuator than with an actuator not polarized.
  • the present invention relates to a electromechanical valve actuator for combustion engine internal with polarized electromagnet and plate movable magnetic switching between a first neighboring position of the electromagnet and a second position distant from the electromagnet, the switching times between these positions being determined according to the operating state of the engine, characterized in that it comprises means for supplying the electromagnet with a variable attraction current during from the plateau approach to the electromagnet.
  • the switching delay of a valve is modified and adapted to operating conditions of the motor by controlling the attraction current of the electromagnet. For example, when the engine is idling, the switching time is increased to decrease the speed impact of the magnetic plate and, consequently, the noise of engine operation.
  • this operating mode can be set implemented thanks to the increased sensitivity and reach of control of a polarized actuator, as detailed above.
  • the actuator comprises means to decrease the current of attraction as approaching the plateau, which reduces consumption of the actuator.
  • the motor comprises means to reverse the direction of the current supplying the electromagnet when the platter switches to the second position.
  • the actuator comprises means for controlling a current generating a magnetic field intensity less than or equal to the magnetic field generated by a magnet of the electromagnet when the current is reversed.
  • the actuator comprises means for simultaneously controlling power supplies for each electromagnet.
  • the actuator comprises a electromagnet with an E-shaped support, one magnet being located at the end of one of the branches of the support opposite relative to the plateau.
  • the variations of the current are relating to an amplitude and / or a supply duration.
  • the actuator comprises means to consider engine speed as a state parameter of this engine.
  • the present invention thus relates to a motor with internal combustion fitted with an actuator comprising a polarized electromagnet and a magnetic plate switching between a first position close to the electromagnet and a second position.
  • a motor is characterized in that the actuator conforms to one of the embodiments previously described.
  • Figure 3a is shown the position x (axis ordinates 300, in mm) of a magnetic plate located between a high electromagnet and a low magnet electromagnet.
  • the position x 0 corresponds to the equidistant position of the plate vis-à-vis the two electromagnets.
  • FIG. 3b are represented the currents i b and i h (ordinate axis 304, in amperes) supplying, respectively, the low electromagnet and the high electromagnet of the actuator considered, while in FIG. 3c the speed v (ordinate axis 306, in m / s) of the magnetic plate.
  • the maintenance of the plate in the low position is obtained by means of a current i b of maintenance of a value of the order of 3.5 amps.
  • an increasing current i h supplies the high electromagnet so as to attract the plate and keep it stabilized in contact with the high electromagnet.
  • the value of holding current used in the high solenoid can differ from the value of the holding current used in the low electromagnet, especially when the electromagnets are distinct.
  • the two currents of maintenance are zero so that no consumption is only required to maintain a valve.
  • valve switches according to a long delay as shown using FIGS. 3a, 3b, 3c, 4a, 4b and 4c, are called slowed-over commutations.
  • FIG. 5a is shown the position x of the valve control plate, previously used for describe slower switching. However, in this figure 5a, this valve is controlled by switching accelerated, switching time being reduced compared to long delay previously used.
  • This action allows the board to reach more quickly higher switching speed compared to the slowed-down switching described using FIGS. 3a, 3b and 3c.
  • the reverse magnetic field generated by the electromagnet has a defined intensity and duration.
  • variations in the switching times can be obtained by changing one or several parameters, such as amplitude or durations application, the supply current of a coil.
  • an electromagnet 700 (Figure 7) whose support 702, E-shaped, is provided with a magnet 704 at the end of one of its branches, in this example the central branch.
  • the magnet 704 being in facing relation to the plate 706 that it controls, the leaks are reduced and the action of the magnet on the plate 706 is increased.
  • the field of the magnet of the order of 1.2 tesla for a neodymium-iron-boron magnet, is weaker than the field necessary to saturate the tray 706 consisting of ferromagnetic material.
  • the invention is susceptible of numerous variants. So, when the plate is located between two electromagnets, these two electromagnets can include means for change the switchover time such as previously described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electromagnets (AREA)
  • Magnetically Actuated Valves (AREA)
EP04300050A 2003-02-18 2004-01-27 Elektromechanische Ventilbetätigungsvorrichtung für Brennkraftmaschine und Brennkraftmaschine mit dieser Ventilbetätigungsvorrichtung Expired - Lifetime EP1450012B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0301953 2003-02-18
FR0301953A FR2851292B1 (fr) 2003-02-18 2003-02-18 Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel ationneur

Publications (2)

Publication Number Publication Date
EP1450012A1 true EP1450012A1 (de) 2004-08-25
EP1450012B1 EP1450012B1 (de) 2008-03-12

Family

ID=32732018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300050A Expired - Lifetime EP1450012B1 (de) 2003-02-18 2004-01-27 Elektromechanische Ventilbetätigungsvorrichtung für Brennkraftmaschine und Brennkraftmaschine mit dieser Ventilbetätigungsvorrichtung

Country Status (7)

Country Link
US (1) US7182051B2 (de)
EP (1) EP1450012B1 (de)
JP (1) JP4581421B2 (de)
AT (1) ATE389098T1 (de)
DE (1) DE602004012342T2 (de)
ES (1) ES2299810T3 (de)
FR (1) FR2851292B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2896615A1 (fr) * 2006-01-20 2007-07-27 Areva T & D Sa Actionneur magnetique a aimant permanent a volume reduit
TWI354079B (en) * 2008-10-03 2011-12-11 Univ Nat Taipei Technology Bi-directional electromechanical valve
US8451080B2 (en) * 2011-02-16 2013-05-28 Toyota Motor Engineering & Manufacturing North America, Inc. Magnetic field focusing for actuator applications
US8736128B2 (en) 2011-08-10 2014-05-27 Toyota Motor Engineering & Manufacturing North America, Inc. Three dimensional magnetic field manipulation in electromagnetic devices
WO2013042566A1 (ja) * 2011-09-19 2013-03-28 三菱電機株式会社 電磁操作装置およびそれを用いた開閉装置
US8570128B1 (en) 2012-06-08 2013-10-29 Toyota Motor Engineering & Manufacturing North America, Inc. Magnetic field manipulation devices and actuators incorporating the same
US9231309B2 (en) 2012-07-27 2016-01-05 Toyota Motor Engineering & Manufacturing North America, Inc. Metamaterial magnetic field guide

Citations (9)

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Publication number Priority date Publication date Assignee Title
DE3500530A1 (de) * 1985-01-09 1986-07-10 Binder Magnete GmbH, 7730 Villingen-Schwenningen Vorrichtung zur elektromagnetischen steuerung von hubventilen
EP0422228A1 (de) * 1988-12-28 1991-04-17 Isuzu Ceramics Research Institute Co., Ltd. Elektromagnetischer ventilbetätiger
EP1010866A2 (de) * 1998-12-07 2000-06-21 Toyota Jidosha Kabushiki Kaisha Elektromagnetischer Ventilbetätiger
EP1174595A1 (de) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Ventilaktuator in einer Brennkraftmaschine
EP1174596A1 (de) * 2000-07-20 2002-01-23 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
JP2002130510A (ja) * 2000-10-18 2002-05-09 Toyota Motor Corp 電磁駆動弁
US6427651B1 (en) * 1999-05-27 2002-08-06 Fev Motorentechnik Gmbh Method for controlling the final position of a gas exchange valve actuated by an electromagnetic actuator in an internal combustion piston engine
EP1264969A2 (de) * 2001-06-08 2002-12-11 Toyota Jidosha Kabushiki Kaisha Einrichtung und Verfahren zur Detektion einer neutralen Ventilposition in einem elektromagnetischem Ventilsteurungssystem und Einrichtung und Verfahren zur Ventilsteuerung
EP1318279A1 (de) * 2001-12-04 2003-06-11 Ford Global Technologies, Inc. Elektromagnetischer Ventilaktuator mit Unterstützung durch Dauermagnet

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DE3513103A1 (de) 1985-04-12 1986-10-16 Fleck, Andreas, 2000 Hamburg Elektromagnetisch arbeitende stellvorrichtung
DE4108758C2 (de) 1991-03-18 2000-05-31 Deutz Ag Magnetventil für eine Kraftstoff-Einspritzvorrichtung
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3500530A1 (de) * 1985-01-09 1986-07-10 Binder Magnete GmbH, 7730 Villingen-Schwenningen Vorrichtung zur elektromagnetischen steuerung von hubventilen
EP0422228A1 (de) * 1988-12-28 1991-04-17 Isuzu Ceramics Research Institute Co., Ltd. Elektromagnetischer ventilbetätiger
EP1010866A2 (de) * 1998-12-07 2000-06-21 Toyota Jidosha Kabushiki Kaisha Elektromagnetischer Ventilbetätiger
US6427651B1 (en) * 1999-05-27 2002-08-06 Fev Motorentechnik Gmbh Method for controlling the final position of a gas exchange valve actuated by an electromagnetic actuator in an internal combustion piston engine
EP1174595A1 (de) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Ventilaktuator in einer Brennkraftmaschine
EP1174596A1 (de) * 2000-07-20 2002-01-23 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
JP2002130510A (ja) * 2000-10-18 2002-05-09 Toyota Motor Corp 電磁駆動弁
EP1264969A2 (de) * 2001-06-08 2002-12-11 Toyota Jidosha Kabushiki Kaisha Einrichtung und Verfahren zur Detektion einer neutralen Ventilposition in einem elektromagnetischem Ventilsteurungssystem und Einrichtung und Verfahren zur Ventilsteuerung
EP1318279A1 (de) * 2001-12-04 2003-06-11 Ford Global Technologies, Inc. Elektromagnetischer Ventilaktuator mit Unterstützung durch Dauermagnet

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Also Published As

Publication number Publication date
ES2299810T3 (es) 2008-06-01
FR2851292B1 (fr) 2007-02-23
DE602004012342D1 (de) 2008-04-24
JP2004278525A (ja) 2004-10-07
ATE389098T1 (de) 2008-03-15
DE602004012342T2 (de) 2009-04-02
JP4581421B2 (ja) 2010-11-17
EP1450012B1 (de) 2008-03-12
US7182051B2 (en) 2007-02-27
FR2851292A1 (fr) 2004-08-20
US20040206318A1 (en) 2004-10-21

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