EP1174595A1 - Ventilaktuator in einer Brennkraftmaschine - Google Patents

Ventilaktuator in einer Brennkraftmaschine Download PDF

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Publication number
EP1174595A1
EP1174595A1 EP01401914A EP01401914A EP1174595A1 EP 1174595 A1 EP1174595 A1 EP 1174595A1 EP 01401914 A EP01401914 A EP 01401914A EP 01401914 A EP01401914 A EP 01401914A EP 1174595 A1 EP1174595 A1 EP 1174595A1
Authority
EP
European Patent Office
Prior art keywords
electromagnet
permanent magnet
electromagnets
valve
magnetic
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
EP01401914A
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English (en)
French (fr)
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EP1174595B1 (de
Inventor
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 EP1174595A1 publication Critical patent/EP1174595A1/de
Application granted granted Critical
Publication of EP1174595B1 publication Critical patent/EP1174595B1/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 valve actuators of internal combustion engines.
  • a valve actuator of the aforementioned type generally comprises two electromagnets between which is provided an air gap.
  • a magnetic pallet linked to the valve actuated, movable by electromagnets against storage springs energy.
  • the arrangement thus formed forms a harmonic oscillator in which stores the energy required for rapid switching by the springs and the change of position is controlled using the electromagnets.
  • the valve position is checked by means of the two coils of electromagnets by application of current which generates a field magnetic producing a force F.
  • this force is proportional to the square of the current injected in the coils and inversely proportional to the square of the air gap.
  • the force exerted on the pallet is always positive due to its proportionality to the square of the coil supply current.
  • the actuator On admission, the actuator must be able to provide the necessary energy at switching. This is to compensate for friction losses which rise at about 0.2 J for an 8 mm stroke or lift of the valve, and by therefore from the range of electromagnets.
  • the energy provided by an electromagnet throughout the race above, is equal to the integral of the force.
  • the useful power would be 20 W, which is low compared to its mass, of the order of 1 kg and its large volume.
  • the energy to be supplied is around 1.4 J to fight against pressure in the cylinder chamber when opening the valve.
  • the current actuator has a low power density which limits its use for controlling intake valves of engines with a unit displacement greater than or equal to 500 cm 3 .
  • the efficiency of an actuator is the ratio between mechanical energy returned (useful) and the electrical energy consumed. It is around 30%, the losses being due mainly to induced currents and losses by effect Joule.
  • An engine revolution has a duration of 60 ms at 1000 rpm, while a valve transition takes approximately 3.5 ms. We can see that at low speed, the system statistically very often in a stable position, either open or closed.
  • the actuator lends itself well to this operation, since the force produced by the electromagnet is naturally raised to zero air gap.
  • the consumption of electric current weighs heavily in the calculation of the consumption of the vehicle which is done at an average speed of 1600 RPM approximately, representative of the actual use of vehicles which contains a lot driving at low engine speeds.
  • 100 W electrical requires approximately 200 W for the internal combustion engine, approximately 1.5% of fuel consumption per cycle.
  • the consumption of the current actuator is high and can be reduced.
  • the engine thus provides an additional parking brake that some users use as an additional brake to the handbrake, in particular in the ribs.
  • valves When using electromagnetic actuators, the valves are in an equilibrium position in the middle, so that all the engine chambers are at atmospheric pressure and there is no more additional braking possible.
  • the actuator itself is relatively inexpensive due to its simplicity, but the associated control electronics as well as the valve position, are complex and therefore expensive.
  • the invention aims to remedy the drawbacks of electromagnetic actuators of conventional valves by creating an actuator, which while being of a relatively low cost price, presents performances improved in all the areas mentioned above.
  • an electromagnetic valve actuator internal combustion engine comprising two electromagnets each comprising a supply coil, a magnetic pallet placed between the two electromagnets, linked to a valve drive member against the action of at least one switching energy storage spring of said valve, characterized in that in the magnetic body of at least one electromagnet is interposed a permanent magnet whose magnetization combines with field generated in said body by the supply coil.
  • the electromagnetic valve actuator shown in Figure 1 comprises two electromagnets 1,2 each comprising a body 3,4 made of magnetic sheet laminated film carrying a respective supply coil 5.6.
  • the faces electromagnets 1,2 turned towards each other, define an air gap between them 7 of a value corresponding to the lifting of a pallet 8 made of magnetic material attached to one end of a rod 9 for actuating a valve 10 of internal combustion engine.
  • the rod 9 passes through the body 4 of one of the electromagnets 2 between which and a housing 12 formed in the cylinder head wall C of an engine, are arranged two opposing springs 13,14 of energy storage surrounding the rod 9 and the tail 15 of the valve to be actuated.
  • the spring 13 bears on the one hand on the body 4 of the electromagnet 2 and on the other hand, on a connecting piece 16 of the rod 9 with the tail 15 of the valve 10.
  • the spring 14 bears between said connecting piece 16 and the bottom of the housing 12 formed in the wall of the cylinder head C.
  • the bodies 3 and 4 of the electromagnets 1 and 2 comprise each two pole pieces 18,19,20,21 between which are inserted respective permanent magnets 22.23.
  • the power coils 5,6 are wound around the branches pole pieces 18,19,20,21 between which the respective magnets are interposed 22.23.
  • the pole pieces 18 to 21 respectively have branches 24,25,26,27 which define two by two, the air gap 7 in which is movably mounted pallet 8 of the actuator.
  • the thickness of the magnet measured in the direction of its magnetization is in principle fairly reduced so that the coils 5 and 6 remain effective for the steering of the system.
  • a magnet is only placed in the most used closing solenoid.
  • FIG. 4 shows a graph of the force F 1 which it is possible to obtain as a function of the air gap e1 between an electromagnet and the movable pallet for a non-polarized electromagnet and a polarized electromagnet according to the invention .
  • the solid curve represents the variation of the force as a function of the air gap for a polarized electromagnet, that is to say provided with a permanent magnet while the dotted curve represents the variation of the force in function of the air gap for a non-polarized electromagnet.
  • the polarized actuator is less sensitive to saturation and therefore easier to control.
  • the sensitivity to the air gap is therefore very low.
  • the polarized actuator is much more easily controllable and must allow reach very low impact speeds much more easily.
  • the useful power of a polarized actuator compared to its volume can be multiplied by a factor equal to at least 2 with respect to that of an actuator not polarized.
  • actuator efficiency polarized is greatly improved compared to that of a non actuator polarized.
  • the polarized actuator has a footprint roughly close to that of an actuator without a permanent magnet in its magnetic circuit.
  • the actuator partially shown in FIG. 1a has two electromagnets such as the electromagnet 1a respectively having bodies such as 2a in magnetic sheet, turned towards each other each carrying a coil supply such as the coil 3a.
  • a magnetic pallet 8a is mounted movable between the magnetic sheet bodies of the electromagnets.
  • the supply coil such as the coil 3a is carried by a central branch 9a of the body 2a which further comprises two lateral branches 10a, 11a. In the central branch 9a is placed a permanent magnet 12a.
  • the second electromagnet of this actuator variant is similar to that described in reference to FIG. 1a and the rest of the actuator is similar to that of FIG. 1.
  • the electromagnetic actuator shown in FIG. 2 is of the type also comprising two electromagnets 30,31 whose respective bodies 32,33 made of magnetic material, for example laminated sheet, are each provided a supply coil 34.35.
  • the electromagnets 30,31 each mounted on holding pieces end 36,37 in non-magnetic material, define between them an air gap 38 whose value corresponds to the lifting of a pallet or magnetic plate 39 carried by a rod 40 for driving a valve 41.
  • the rod 40 passes through the body 32.33 of the electromagnets 30.31 as well as the end retaining parts 36.37 which each have a blind sleeve 42.43 externally threaded and containing a corresponding 44.45 energy storage spring.
  • Each spring 44.45 bears on the one hand, against the bottom of the sleeve blind 42.43 corresponding and on the other hand, on a disc 46.47 in contact by its face opposite the spring with a corresponding end of the rod 40 valve 41.
  • the valve 41 has a stem 49 which bears on the face of the disc 47 opposite the rod 40, which is surrounded by the spring 45 and which passes through the bottom of the blind sleeve 43, the head 50 of said valve cooperating with a valve seat of an engine cylinder head (not shown).
  • each of the bodies magnetic 32.33 electromagnets 30.31 has two pole pieces 51.52.53.54 respectively, between which are placed permanent magnets 55.56 whose function is similar to that of permanent magnets 22.23 of the embodiment of FIG. 1.
  • the electromagnetic actuator shown schematically in the figure 3 comprises two electromagnets 60, 61 of which the bodies made of magnetic material for example in laminated sheets, each carry a supply coil 63.64.
  • each electromagnet has two pole pieces 65.66 and 67.68 joined together by a respective permanent magnet 69.70 surrounded by the corresponding supply coil 63.64.
  • Each of the permanent magnets 69.70 is mounted in a branch corresponding central unit 71.72 formed by corresponding portions of the parts polar 65.66 and 67.68. It is placed in the central branch of its circuit inclined magnetic, so that its magnetization is inclined relative to to the electromagnetic field generated by the supply coil 63.64 corresponding and thus combines with the latter.
  • each permanent magnet 69.70 is advantageously chosen so that the end of its longitudinal side interior furthest away from side branches of pole pieces 65,66,67,68 is at a distance d from these branches equal to the width of these.
  • each permanent magnet 69.70 in the body of the corresponding electromagnet is produced by cutting the sheets of the pole pieces 65.66 and 67.68 so as to form between the pole pieces 65.66 on the one hand and 67.68 on the other hand, housings receiving the respective magnets 69.70.
  • the faces of the electromagnets 60,61 facing one another define between them an air gap 74 of a value corresponding to the lifting of a pallet 75 made of a magnetic material fixed to one end of an actuating rod 76 a valve 77 of the internal combustion engine.
  • the rod 76 passes through the body of the electromagnet 61 between which and a housing 78 formed in the wall of the cylinder head C of an engine, are arranged two springs 79.80 of energy storage surrounding the drive rod 76 and the stem 81 of the valve to operate.
  • tilting the magnets 69.70 relative to the direction fields generated by the power coils 63,64 reduces considerably the height of the magnetic circuits of the electromagnets 60,61.
  • the power consumption of holding the valve in position is none or very limited.
  • the polarized actuator is overall more powerful and therefore better suitable for use on exhaust valves or on an engine lower unit displacement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Magnetically Actuated Valves (AREA)
EP01401914A 2000-07-18 2001-07-17 Ventilaktuator in einer Brennkraftmaschine Expired - Lifetime EP1174595B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0009430 2000-07-18
FR0009430A FR2812024B1 (fr) 2000-07-18 2000-07-18 Actionneur de soupapes de moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1174595A1 true EP1174595A1 (de) 2002-01-23
EP1174595B1 EP1174595B1 (de) 2010-03-03

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Family Applications (1)

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EP01401914A Expired - Lifetime EP1174595B1 (de) 2000-07-18 2001-07-17 Ventilaktuator in einer Brennkraftmaschine

Country Status (5)

Country Link
EP (1) EP1174595B1 (de)
AT (1) ATE459788T1 (de)
DE (1) DE60141434D1 (de)
ES (1) ES2341315T3 (de)
FR (1) FR2812024B1 (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849101A1 (fr) * 2002-12-23 2004-06-25 Johnson Contr Automotive Elect Actionneur electromagnetique de soupape bibobine a aimant permanent
FR2849100A1 (fr) * 2002-12-23 2004-06-25 Johnson Controls Tech Co Actionneur electromagnetique monobobine a palette pivotante
FR2851292A1 (fr) * 2003-02-18 2004-08-20 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel ationneur
FR2851291A1 (fr) * 2003-02-18 2004-08-20 Peugeot Citroen Automobiles Sa Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
FR2851367A1 (fr) * 2003-02-18 2004-08-20 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
FR2865238A1 (fr) * 2004-01-15 2005-07-22 Peugeot Citroen Automobiles Sa Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
FR2865498A1 (fr) * 2004-01-27 2005-07-29 Peugeot Citroen Automobiles Sa Dispositif de commande a electroaimant pour une soupape de moteur a combustion interne
FR2865763A1 (fr) * 2004-02-03 2005-08-05 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape de moteur a combustion interne
FR2865764A1 (fr) * 2004-02-03 2005-08-05 Peugeot Citroen Automobiles Sa Perfectionnements apportes a un actionneur electromecanique de soupape de moteur a combustion interne
FR2870629A1 (fr) * 2004-05-19 2005-11-25 Johnson Controls Tech Co Actionneur electromagnetique avec un electroaimant a aimant comportant un noyau unitaire
FR2870631A1 (fr) * 2004-05-24 2005-11-25 Johnson Contr Automotive Elect Actionneur electromagnetique comportant un electroaimant a bobine solidaire d'un element additionnel, et procede d'assemblage d'un tel actionneur
US7111595B2 (en) 2003-02-18 2006-09-26 Peugeot Citroen Automobiles Sa Electromechanical valve control actuator for internal combustion engines
US7124720B2 (en) * 2004-03-25 2006-10-24 Ford Global Technologies, Llc Permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
US7185617B2 (en) * 2004-02-27 2007-03-06 Cnrs Centere National De La Recherche Scientifique Electromagnetic valve actuating device for an internal combustion engine
US7249579B2 (en) * 2004-03-25 2007-07-31 Ford Global Technologies, Llc Enhanced permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
US7426911B2 (en) 2004-06-21 2008-09-23 Ford Global Technologies, Llc Enhanced permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
EP1450010A3 (de) * 2003-02-18 2008-12-31 Peugeot Citroen Automobiles SA Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator
EP2111626A2 (de) * 2007-02-12 2009-10-28 Engineering Matters, Inc. Verfahren und system für einen linearen stellantrieb mit stationären vertikalen magneten und spulen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034955A1 (de) * 1980-02-20 1981-09-02 DUCELLIER & Cie Zündspule für Verbrennungsmotoren
DE3500530A1 (de) * 1985-01-09 1986-07-10 Binder Magnete GmbH, 7730 Villingen-Schwenningen Vorrichtung zur elektromagnetischen steuerung von hubventilen
US4829947A (en) * 1987-08-12 1989-05-16 General Motors Corporation Variable lift operation of bistable electromechanical poppet valve actuator
EP0932167A2 (de) * 1998-01-27 1999-07-28 Genesis Co., Ltd. Hybrid-Typ Magnet und diese enthaltende Schrittmotor
JPH11350929A (ja) * 1998-06-11 1999-12-21 Toyota Motor Corp 電磁駆動バルブ
EP1010866A2 (de) 1998-12-07 2000-06-21 Toyota Jidosha Kabushiki Kaisha Elektromagnetischer Ventilbetätiger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0034955A1 (de) * 1980-02-20 1981-09-02 DUCELLIER & Cie Zündspule für Verbrennungsmotoren
DE3500530A1 (de) * 1985-01-09 1986-07-10 Binder Magnete GmbH, 7730 Villingen-Schwenningen Vorrichtung zur elektromagnetischen steuerung von hubventilen
US4829947A (en) * 1987-08-12 1989-05-16 General Motors Corporation Variable lift operation of bistable electromechanical poppet valve actuator
EP0932167A2 (de) * 1998-01-27 1999-07-28 Genesis Co., Ltd. Hybrid-Typ Magnet und diese enthaltende Schrittmotor
JPH11350929A (ja) * 1998-06-11 1999-12-21 Toyota Motor Corp 電磁駆動バルブ
EP1010866A2 (de) 1998-12-07 2000-06-21 Toyota Jidosha Kabushiki Kaisha Elektromagnetischer Ventilbetätiger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 03 30 March 2000 (2000-03-30) *

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2849101A1 (fr) * 2002-12-23 2004-06-25 Johnson Contr Automotive Elect Actionneur electromagnetique de soupape bibobine a aimant permanent
FR2849100A1 (fr) * 2002-12-23 2004-06-25 Johnson Controls Tech Co Actionneur electromagnetique monobobine a palette pivotante
EP1450013A3 (de) * 2003-02-18 2005-03-30 Peugeot Citroen Automobiles S.A. Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator
US7487749B2 (en) 2003-02-18 2009-02-10 Peugeot Citroen Automobiles Sa Electromechanical valve actuator for internal combustion engines and internal combustion engine equipped with such an actuator
FR2851367A1 (fr) * 2003-02-18 2004-08-20 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
EP1450013A2 (de) * 2003-02-18 2004-08-25 Peugeot Citroen Automobiles S.A. Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator
EP1450012A1 (de) * 2003-02-18 2004-08-25 Peugeot Citroen Automobiles SA Elektromechanische Ventilbetätigungsvorrichtung für Brennkraftmaschine und Brennkraftmaschine mit dieser Ventilbetätigungsvorrichtung
EP1450011A2 (de) * 2003-02-18 2004-08-25 Peugeot Citroen Automobiles SA Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator
US7146943B2 (en) 2003-02-18 2006-12-12 Peugeot Citroen Automobiles Sa Electromechanical valve actuator for internal combustion engines and internal combustion engine equipped with such an actuator
US7182051B2 (en) 2003-02-18 2007-02-27 Peugeot Citroen Automobiles Sa Electromechanical valve actuator for internal combustion engines and internal combustion engine equipped with such an actuator
US7097150B2 (en) 2003-02-18 2006-08-29 Peugeot Citroen Automobiles Sa Electromechanical valve control actuator for internal combustion engines and internal combustion engine equipped with such an actuator
FR2851292A1 (fr) * 2003-02-18 2004-08-20 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel ationneur
FR2851291A1 (fr) * 2003-02-18 2004-08-20 Peugeot Citroen Automobiles Sa Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
EP1450010A3 (de) * 2003-02-18 2008-12-31 Peugeot Citroen Automobiles SA Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator
EP1450011A3 (de) * 2003-02-18 2008-12-24 Peugeot Citroen Automobiles SA Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator
US7111595B2 (en) 2003-02-18 2006-09-26 Peugeot Citroen Automobiles Sa Electromechanical valve control actuator for internal combustion engines
FR2865238A1 (fr) * 2004-01-15 2005-07-22 Peugeot Citroen Automobiles Sa Actionneur electromecanique de commande de soupape pour moteur a combustion interne et moteur a combustion interne muni d'un tel actionneur
US7156057B2 (en) 2004-01-15 2007-01-02 Cnrs Centre National De La Recherche Scientifique Electromagnetic actuator for controlling a valve of an internal combustion engine and internal combustion engine equipped with such an actuator
FR2865498A1 (fr) * 2004-01-27 2005-07-29 Peugeot Citroen Automobiles Sa Dispositif de commande a electroaimant pour une soupape de moteur a combustion interne
WO2005075796A1 (fr) * 2004-01-27 2005-08-18 Peugeot Citroën Automobiles SA Dispositif de commande à électroaimant pour une soupape de moteur à combustion interne
US7798110B2 (en) 2004-01-27 2010-09-21 Peugeot Citroen Automobiles Sa Electromagnet-equipped control device for an internal combustion engine valve
US7047919B2 (en) 2004-02-03 2006-05-23 Peugeot Citroen Automobiles Sa Made to an electromechanical valve actuator of an internal combustion engine
EP1561914A2 (de) * 2004-02-03 2005-08-10 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
FR2865763A1 (fr) * 2004-02-03 2005-08-05 Peugeot Citroen Automobiles Sa Actionneur electromecanique de soupape de moteur a combustion interne
FR2865764A1 (fr) * 2004-02-03 2005-08-05 Peugeot Citroen Automobiles Sa Perfectionnements apportes a un actionneur electromecanique de soupape de moteur a combustion interne
US7111596B2 (en) 2004-02-03 2006-09-26 Peugeot Citroen Automobiles Sa Electromechanical operator for a valve of an internal combustion engine
EP1561915A2 (de) * 2004-02-03 2005-08-10 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
EP1561915A3 (de) * 2004-02-03 2008-09-03 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
EP1561914A3 (de) * 2004-02-03 2008-09-03 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
US7185617B2 (en) * 2004-02-27 2007-03-06 Cnrs Centere National De La Recherche Scientifique Electromagnetic valve actuating device for an internal combustion engine
US7249579B2 (en) * 2004-03-25 2007-07-31 Ford Global Technologies, Llc Enhanced permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
US7124720B2 (en) * 2004-03-25 2006-10-24 Ford Global Technologies, Llc Permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
US7584727B2 (en) * 2004-03-25 2009-09-08 Ford Global Technologies, Llc Permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
FR2870629A1 (fr) * 2004-05-19 2005-11-25 Johnson Controls Tech Co Actionneur electromagnetique avec un electroaimant a aimant comportant un noyau unitaire
WO2005124798A1 (fr) * 2004-05-19 2005-12-29 Valeo Systemes De Controle Moteur Actionneur electromagnetique avec un electroaimant a aimant comportant un noyau unitaire
FR2870631A1 (fr) * 2004-05-24 2005-11-25 Johnson Contr Automotive Elect Actionneur electromagnetique comportant un electroaimant a bobine solidaire d'un element additionnel, et procede d'assemblage d'un tel actionneur
WO2006000674A1 (fr) * 2004-05-24 2006-01-05 Valeo Systemes De Controle Moteur Actionneur electromagnetique comportant un electroaimant a bobine solidaire d'un aimant permanent, et procede d'assemblage d'un tel actionneur
US7426911B2 (en) 2004-06-21 2008-09-23 Ford Global Technologies, Llc Enhanced permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine
EP2111626A2 (de) * 2007-02-12 2009-10-28 Engineering Matters, Inc. Verfahren und system für einen linearen stellantrieb mit stationären vertikalen magneten und spulen
EP2111626A4 (de) * 2007-02-12 2012-10-31 Engineering Matters Inc Verfahren und system für einen linearen stellantrieb mit stationären vertikalen magneten und spulen

Also Published As

Publication number Publication date
ATE459788T1 (de) 2010-03-15
FR2812024A1 (fr) 2002-01-25
DE60141434D1 (de) 2010-04-15
ES2341315T3 (es) 2010-06-18
FR2812024B1 (fr) 2003-04-04
EP1174595B1 (de) 2010-03-03

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