EP1519012B1 - Ventilsteuerungseinrichtung in einem Brennkraftmaschine, und Brennkraftmaschine mit derselben - Google Patents

Ventilsteuerungseinrichtung in einem Brennkraftmaschine, und Brennkraftmaschine mit derselben Download PDF

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Publication number
EP1519012B1
EP1519012B1 EP04300611.3A EP04300611A EP1519012B1 EP 1519012 B1 EP1519012 B1 EP 1519012B1 EP 04300611 A EP04300611 A EP 04300611A EP 1519012 B1 EP1519012 B1 EP 1519012B1
Authority
EP
European Patent Office
Prior art keywords
valve
engine
current
magnet
defluxing
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
EP04300611.3A
Other languages
English (en)
French (fr)
Other versions
EP1519012A2 (de
EP1519012A3 (de
Inventor
Cédric Morin
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 EP1519012A2 publication Critical patent/EP1519012A2/de
Publication of EP1519012A3 publication Critical patent/EP1519012A3/de
Application granted granted Critical
Publication of EP1519012B1 publication Critical patent/EP1519012B1/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

Definitions

  • the present invention relates to a valve control device for an internal combustion engine and to an internal combustion engine comprising such a device, in particular for controlling a valve by means of an electromechanical actuator provided with a magnet, as described in EP 1 010 866 A2 .
  • a device 100 ( figure 1a ) provided with an electromechanical valve actuator 102 generally comprises springs 102 and 103 and electromagnets 106 and 108 for controlling the position of the valve 110 by means of electrical signals controlled by a processor 101.
  • these electrical signals include currents for generating magnetic fields for moving or holding the valve 110 in a given position.
  • the tail of the valve 110 is applied against the rod 112 of a magnetic plate 114 movable between the two electromagnets 106 and 108 so that, depending on the magnetic fields to which the plate is subjected, the latter moves or keep in a position such that the valve 110 is open ( figure 1a ), allowing gas admission in the cylinder 117, or closed ( figure 1b ), blocking the admission of gas into this cylinder 117.
  • moving the valve 110 to an open position is obtained by controlling a current I and attraction in the coil 107 of the electromagnet 106 which then attracts the plate 114 by means of a magnetic field H at , the shaft 112 of the plate moving the valve 110 in the open position.
  • the actuator 102 may be provided with magnets 118 (electromagnet 108) and 116 (electromagnet 106), the latter being represented on the figure 1b , intended to optimize the operation of the device, in particular by reducing the operating noise of the actuator and the energy required to attract and hold the plate 114 in a switched position.
  • each magnet is located on an electromagnet so that its magnetic field H ai maintains the movable plate against this electromagnet, as shown in FIG. figure 1a .
  • the magnetic field H ai of the magnet participates in the attraction of the plate and, subsequently, this magnetic field H ai makes it possible to hold the plate 114 against an electromagnet with a reduced or even zero holding current.
  • the current I die defluxing has an opposite direction in the coils of an electromagnet in the direction of the current I at attraction.
  • FIG. 2a represents the location (y-axis 200, in mm) of the magnetic plate 114 between the two electromagnets 106 and 108 as a function of time (abscissa axis 202, in ms), and with the aid of the figure 2b which represents the intensity and duration of the current I defluxing (ordinate 204) flowing in the coil 109 of the electromagnet 108 according to the same timing as that of the figure 2a (abscissa axis 202, in ms).
  • the energy required by the defluxing current influences the electrical consumption of the actuator (ordinate axis 304) so that an energy optimum 306 can be obtained for a switching delay ⁇ t1 ( figure 4 , the ordinate axis 400 representing switching times) greater than the delay ⁇ t o minimum switching, this delay ⁇ t o minimum requiring greater electrical energy.
  • the slowing of the valve to obtain a longer switching time than the optimal switching time ⁇ t1 also requires more energy.
  • the power consumption of the device at low engine speed is reduced while the lengthening of the switching time of the valve can correspond to the longer engine cycle of a low speed engine.
  • the present invention results from the observation that the control of the defluxing current as a function of the single engine speed has the disadvantage of not allowing a good optimization of the operation of an electromagnet actuator.
  • an electromagnet actuator makes it possible to control a valve according to many parameters other than the engine speed, such as, for example, the pressure of the gases at the inlet of a cylinder, the gas rate of recycled exhaust in the intake gas, the amount of gas to be admitted into the cylinder and / or the number of active valves.
  • the same opening time of a valve can be obtained with a large number of operating states of the engine if this state of the engine is only described by the engine speed and / or the engine load.
  • the invention results from the observation that, as detailed later, a variation in the speed of opening and / or closing of a valve has an even smaller influence than the duration during which the valve is open and / or closed is large.
  • the present invention relates to a control device of an internal combustion engine valve, this device comprising an electromechanical actuator provided with a magnet and a processor controlling a defluxing current generating a magnetic field opposite the magnetic field. of the magnet, characterized in that it comprises means for controlling the defluxing current as a function of the opening time of the valve and means for determining a speed of opening and / or closing of the valve to from its opening time, the controlled defluxing current ensuring the speed of opening and / or closure determined.
  • Such a device has the advantage of controlling the defluxing current of the actuator as a function of the duration opening of the valve without prejudging the manner in which it is determined, and not according to the state of the engine, described for example by the engine speed, as disclosed by the prior art, thus optimizing the operation of the engine. actuator.
  • the invention allows the application of different control strategies of a valve without necessarily having knowledge of the operation of the motor driven by the said valve.
  • the duration of opening of a valve is not descriptive of the state of the engine, including its speed.
  • the determination of a speed of opening and / or closing minimizes the energy consumption of the actuator while corresponding to the energy requirement of the engine.
  • the device comprises means for determining a speed of opening and / or closing of the valve from its opening time, the controlled defluxing current ensuring the speed of opening and / or closure determined .
  • the device comprises means for controlling the defluxing current by modifying its intensity and / or its duration.
  • the device comprises means for determining the opening time of the valve from engine parameters such as engine speed, the amount of air admitted into the cylinder concerned, the pressure of the gases at the intake. , the exhaust gas recirculation rate and the number of active intake valves per cylinder.
  • the magnet located on an electromagnet of the actuator, ensures the maintenance of the valve in an open or closed position without requiring a holding current.
  • the actuator comprises two electromagnets, each electromagnet being provided with a magnet, for example to maintain the valve in an open or closed position without requiring a holding current.
  • the invention also relates to an internal combustion engine provided with a valve control device, said device comprising an electromechanical actuator provided with a magnet and a processor controlling a defluxing current generating a magnetic field opposite to the magnetic field of the magnet, characterized in that it comprises means for controlling this defluxing current as a function of the opening time of the valve and means for determining a speed of opening and / or closing of the valve from its opening time, the controlled defluxing current ensuring the speed of opening and / or closure determined.
  • the motor comprises means for determining a speed of opening and / or closing of the valve from its opening time, the controlled deflowering current ensuring the speed of opening and / or closure determined .
  • the motor comprises means for controlling the defluxing current by modifying its intensity and / or duration.
  • the engine comprises means for determining the opening time of the valve from engine parameters such as engine speed, the amount of air admitted into the cylinder concerned, the pressure of the gases at the intake , the exhaust gas recirculation rate and the number of active intake valves per cylinder.
  • Device example 500 ( figure 5 ) according to the invention described below uses a processor 501 controlling the defluxing current flowing in the coil 507 of the electromagnet 506 of a valve actuator 502 510.
  • This processor 501 receives, from another processor (not shown) or internally, that is to say the same processor 501, an opening instruction of the valve 510 determining the time and duration of of this opening.
  • the processor 501 determines how quickly the opening and / or closing of a valve must be performed considering that, as detailed below using the Figures 6a and 6b , the speed required for the opening of a valve is a function of the duration dt of its opening.
  • the durations dt are represented by considering a first defluxing current Idé1 (dotted curve) and a second defluxing current Idé2 (continuous curve) of intensity and duration less than those of the first current Idé1.
  • the processor 501 comprises means for determining a minimum opening speed as a function of the opening time determined for the valve, this minimum opening speed to minimize the energy consumption of the valve. actuator while corresponding to the need for engine operation.
  • the processor 501 can determine the defluxing current required to obtain this speed of opening, for example by means of a mapping.
  • the present invention is capable of many variants. Thus, it is possible to implement the invention in different actuators comprising one or two electromagnets.
  • the invention can be applied to an actuator of which a single electromagnet is provided with a magnet, the magnet allowing, for example, the maintenance of the valve in the closed position.
  • the invention can be implemented by considering a magnet generating a sufficiently large magnetic field to maintain the valve in a fixed position, or switched, regardless of the number of electromagnets provided with or without magnet (s) .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (5)

  1. Vorrichtung (500) zum Steuern eines Ventils (510) einer Brennkraftmaschine, wobei diese Vorrichtung einen elektromechanischen Aktuator (502), der mit einem Magnet versehen ist, und einen Prozessor (501) umfasst, der einen Strom (Idé) zur Feldabschwächung steuert, der ein Magnetfeld erzeugt, das dem Magnetfeld des Magnets entgegengesetzt ist, dadurch gekennzeichnet, dass sie Mittel (501) zum Steuern dieses Stroms (Ide) zur Feldabschwächung in Abhängigkeit von der Öffnungsdauer (dt) des Ventils (510) und nicht in Abhängigkeit von dem Zustand der Maschine, der von der Motordrehzahl beschrieben wird, umfasst, sowie Mittel zum Bestimmen einer bestimmten Öffnungs- und/oder Schließschnelligkeit des Ventils (510) ausgehend von seiner Öffnungsdauer (dt), wobei der Strom (Idé) zur Feldabschwächung die bestimmte Öffnungs- und/oder Schließschnelligkeit sicherstellt, und dadurch, dass der Magnet, der sich auf einem Elektromagnet (506, 508) des Aktuators (502) befindet, das Halten des Ventils (510) in einer offenen oder geschlossenen Position ohne Heranziehen eines Haltestroms sicherstellt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie Mittel zum Steuern des Stroms (Ide) zur Feldabschwächung umfasst, indem seine Stärke und/oder seine Dauer geändert wird.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sie Mittel zum Bestimmen der Öffnungsdauer (dt) des Ventils ausgehend von Maschinenparametern, wie zum Beispiel der Drehzahl (R) der Maschine, der Luftmenge (Q), die in den betreffenden Zylinder angesaugt wird, dem Druck (P) der Gase an der Ansaugung, der Recyclingrate (T) der Abgase als Ansaugungsgas und der Anzahl (N) von aktiven Saugventilen pro Zylinder umfasst.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Aktuator (502) zwei Elektromagnete (506, 508) umfasst, wobei jeder Elektromagnet (506, 508) mit einem Magnet versehen ist, um zum Beispiel das Halten des Ventils (510) in einer geöffneten oder geschlossenen Position sicherzustellen, ohne einen Haltestrom heranzuziehen.
  5. Brennkraftmaschine, die mit einer Steuervorrichtung eines Ventils (510) nach einem der vorhergehenden Ansprüche versehen ist.
EP04300611.3A 2003-09-24 2004-09-17 Ventilsteuerungseinrichtung in einem Brennkraftmaschine, und Brennkraftmaschine mit derselben Expired - Lifetime EP1519012B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0350605A FR2860032B1 (fr) 2003-09-24 2003-09-24 Dispositif de commande de soupape pour moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif
FR0350605 2003-09-24

Publications (3)

Publication Number Publication Date
EP1519012A2 EP1519012A2 (de) 2005-03-30
EP1519012A3 EP1519012A3 (de) 2008-09-03
EP1519012B1 true EP1519012B1 (de) 2016-11-16

Family

ID=34179012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300611.3A Expired - Lifetime EP1519012B1 (de) 2003-09-24 2004-09-17 Ventilsteuerungseinrichtung in einem Brennkraftmaschine, und Brennkraftmaschine mit derselben

Country Status (3)

Country Link
US (1) US7069886B2 (de)
EP (1) EP1519012B1 (de)
FR (1) FR2860032B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875264A1 (fr) * 2004-09-14 2006-03-17 Yterium Entpr Unipersonnelle A Pilotage du courant de commande d'un actionneur de soupape avec aimant permanent pour moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif et pilote de telle facon
ITGE20080036A1 (it) * 2008-04-30 2009-11-01 Dott Ing Mario Cozzani Srl Metodo per il controllo della posizione di un attuatore elettromeccanico per valvole di compressori alternativi.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2707127B2 (ja) * 1988-12-28 1998-01-28 株式会社いすゞセラミックス研究所 電磁力バルブ駆動装置
DE3920931A1 (de) * 1989-06-27 1991-01-03 Fev Motorentech Gmbh & Co Kg Elektromagnetisch arbeitende stelleinrichtung
FR2784497B1 (fr) * 1998-10-07 2000-12-15 Sagem Actionneur electromagnetique a palette aimantee
JP3846070B2 (ja) * 1998-10-29 2006-11-15 トヨタ自動車株式会社 電磁駆動弁の制御装置
JP4126787B2 (ja) * 1998-12-07 2008-07-30 トヨタ自動車株式会社 電磁駆動装置
JP3508636B2 (ja) * 1999-08-19 2004-03-22 日産自動車株式会社 電磁駆動吸排気弁の制御装置
US6532919B2 (en) * 2000-12-08 2003-03-18 Ford Global Technologies, Inc. Permanent magnet enhanced electromagnetic valve actuator
JP2002364391A (ja) * 2001-06-08 2002-12-18 Toyota Motor Corp 電磁駆動弁の中立位置変化検出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Also Published As

Publication number Publication date
FR2860032A1 (fr) 2005-03-25
US7069886B2 (en) 2006-07-04
EP1519012A2 (de) 2005-03-30
US20050081806A1 (en) 2005-04-21
FR2860032B1 (fr) 2007-07-20
EP1519012A3 (de) 2008-09-03

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