EP1450013A2 - 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

Info

Publication number: EP1450013A2
Authority: EP; European Patent Office
Prior art keywords: plate; electromagnet; actuator; valve; action
Prior art date: 2003-02-18
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

EP04300086A

Other languages

English (en)

French (fr)

Other versions

EP1450013A3 (de

EP1450013B1 (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.)

2003-02-18

Filing date

2004-02-17

Publication date

2004-08-25

2004-02-17 Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA

2004-08-25 Publication of EP1450013A2 publication Critical patent/EP1450013A2/de

2005-03-30 Publication of EP1450013A3 publication Critical patent/EP1450013A3/de

2007-07-11 Application granted granted Critical

2007-07-11 Publication of EP1450013B1 publication Critical patent/EP1450013B1/de

2024-02-17 Anticipated expiration legal-status Critical

Status 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
- F01L9/40—Methods of operation thereof; Control of valve actuation, e.g. duration or lift
- F01L2009/4086—Soft landing, e.g. applying braking current; Levitation of armature close to core surface

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.
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 and the plate 114 alternate fixed positions, called switched positions, with displacements transients between these two positions.
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, that is to say in contact against one of the electromagnets.
Such electromagnets are called the following electromagnets with magnet or electromagnets polarized.
the present invention remedies at least one of these disadvantages. It results from the observation that the action exercised on a plate by an electromagnet can be controlled more precisely, and with greater range, when this electromagnet is polarized, as explained below in using figure 2
the force exerted by an electromagnet not polarized is nonlinear, i.e. inversely proportional the square of the air gap and proportional to the square of the intensity of the current supplying the electromagnet.
the present invention also results from the observation that the force exerted by a polarized electromagnet on a magnetic plate can compensate for the mechanical restoring force to which the latter is subject even when this plateau is away from the electromagnet.
the force exerted by the electromagnet for different decreasing supply currents is determined (curves 202 2 , 202 3 and 202 4 ) as well as the mechanical force, exerted by springs, undergone by the plate (curve 210). depending on the distance or air gap separating the latter from the electromagnet.
the force exerted by this electromagnet equals the mechanical force for an air gap less than the value of the distribution clearance.
the invention results from the observation that the holding in the switched position of a valve requires a important food even when this maintenance is not necessary to operate the admission stages and / or exhaust gases vis-à-vis the cylinder.
the present invention relates to a electromechanical valve actuator for combustion engine internal equipped with a polarized electromagnet exerting an action magnetic on a magnetic plate subjected to an action mechanical return, this action being able to compensate for the action mechanical and keep the plate in a position distant from the electromagnet, characterized in that the actuator comprises means so that the displacements of the plate are only controlled by this electromagnet and the mechanical return action so that the stage goes back and forth to from the remote position
the contacts between the plate and the electromagnet are removed and the operation of the actuator causes a greatly reduced noise.
the actuator comprises means so that the distance position of the plate corresponds to a valve open position.
the actuator comprises means to move the remote plate away from the electromagnet by canceling or by reversing the direction of the current supplying the latter.
the plate is maintained at a distance such that the valve stem is one plate stem controlling this valve.
the plate is of section lower than the section of extreme branches and / or less than half the section of the central branch.
the electromagnet being shaped of E, a magnet is fixed, at the end of one of these branches, opposite the tray.
the mechanical return action is generated by at least one spring.
the invention also relates to a combustion engine internal fitted with an electromechanical valve actuator internal combustion engine comprising a polarized electromagnet and a mobile magnetic plate subjected to a mechanical action of reminder.
the actuator is according to one previous achievements.
an actuator 301 comprises an electromagnet 300, in shape of E, and a magnetic plate 302 movable in the vicinity of the electromagnet 300.
a magnetic circuit is formed, on the one hand, by the central branch 304, of section S c , and the end branches 306, of section S c / 2 , of the electromagnet 300 and, on the other hand, by tray 302, section S p .
the magnetic flux that it generates can be concentrated by reducing the section of its end branches 306 so that the central section S c of the electromagnet is greater than twice the cross-section S c of the ends.
Such a flux concentration makes it possible to obtain important inductions in the air gap with use magnets with weak remanent fields, such as magnets formed of ferrite or composite materials.
section Sp of the plate is equal to the section S c / 2 of the magnetic circuit so as to reduce the mass of the plate.
springs (not shown) of low stiffness can be used to control a mass plateau limited. Consequently, the required electrical consumption is reduced to move the tray.
Such an improvement in the control of the plate allows, for example, to control the approach speed of the platform opposite of the electromagnet or to modify the times of plate switching.
the size of the electromagnet is not more imposed in height by the section of the magnet.
a first operating mode known as switching with docking, is described using Figure 4a. Next what mode, the plate is located between two electromagnets successively activated in order to maintain this plateau at their contact.
the plate switches between a first minimum position x b and a second maximum position x h corresponding, respectively, to the position of the plate in contact with the low electromagnet and to the position of the plate in contact with the high electromagnet.
the speed v of the plate (axis 408) varies in accordance with this displacement so that, in contact with the electromagnet low or high solenoid, this speed is zero while maximum when the plateau is substantially equidistant of these two electromagnets.
each electromagnet is powered by a current im holding.
a second operating mode of the actuator is described using Figure 4b. According to this mode, the control of the previously described tray is carried out by means of activations successive electromagnets, as described by means of the Figure 4a, but the platform is kept away from electromagnets according to the invention. Subsequently, the plate kept distant by an electromagnet is said to be levitation.
the minimum position x ' b of the plate has a value greater than the value x b that the plate had when the latter came into contact with the low electromagnet.
the low electromagnet keeps the switched tray distant in levitation.
the high electromagnet keeps the plate distant from its vicinity so that the maximum position x ' h has a value less than the value x h of the plate when the latter comes into contact against the high electromagnet (figure 4a).
a third operating mode called ballistics with docking, is described using Figure 4c.
the displacements of the plate located between two electromagnets are only controlled by activating a single of these electromagnets as explained below.
the position x (axis 420, in mm) of the plate varies as a function of time (abscissa axis 422, in ms) from its first maximum position x h to a second minimum position x b corresponding, respectively, to the position of the plate in contact with the high electromagnet and at the position closest to the plate vis-à-vis the low electromagnet.
the plateau makes a round trip from of the high electromagnet so that its speed v (axis 424) increases when it tends towards the low electromagnet, then reverses when the plate moves away from this low electromagnet to return to the top electromagnet.
Such a ballistic control mode therefore allows, as shown along axis 426, to require only the supply of current ih of the high electromagnet to control the plate.
the ballistic control of the plate is combined with a levitation of the latter by the high electromagnet.
Such finesse of control can be used to reduce the impact between the plate rod and the rod valve as explained using FIGS. 5a and 5b, which represent the operation of an actuator 500 conforming to the invention, the plate 502 being kept away from electromagnets 504 and 506 in its high switched position ( Figure 5a) or low ( Figure 5b).
the clearance 509 between the rod 508 of the plate and valve stem 510 is kept at a low value by the high electromagnet 504 which keeps the plate in levitation. So when the platter switches to the low solenoid, the contact between the valve stem and the plateau rod occurs at a lower speed than if the plate came into contact with the electromagnet, which reduces the noise of this contact.
the present invention is susceptible of numerous variants. For example, it is possible to have a magnet on the board so that it generates a field now the remote plate of the electromagnet.
the use of the invention allows use an inlet valve actuator separate from a exhaust valve actuator.
a valve actuator intake can be sized to provide a power of standard hold since the cold hold of the valve is ensured by the removal of this maintenance.
the dimensions of the actuator intake can be reduced, thereby reducing mass and engine dimensions.

Landscapes

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

EP04300086A 2003-02-18 2004-02-17 Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator Expired - Lifetime EP1450013B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR0301944		2003-02-18
FR0301944A FR2851367B1 (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 actionneur

Publications (3)

Publication Number	Publication Date
EP1450013A2 true EP1450013A2 (de)	2004-08-25
EP1450013A3 EP1450013A3 (de)	2005-03-30
EP1450013B1 EP1450013B1 (de)	2007-07-11

Family

ID=32732012

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP04300086A Expired - Lifetime EP1450013B1 (de)	2003-02-18	2004-02-17	Elektromagnetischer Aktuator zur Betätigung eines Gaswechselventils an einer Kolbenbrennkraftmaschine und Brennkraftmaschine mit einem solchen Aktuator

Country Status (7)

Country	Link
US (1)	US7146943B2 (de)
EP (1)	EP1450013B1 (de)
JP (1)	JP5025889B2 (de)
AT (1)	ATE366865T1 (de)
DE (1)	DE602004007420T2 (de)
ES (1)	ES2286573T3 (de)
FR (1)	FR2851367B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US7165518B2 (en)	2005-02-01	2007-01-23	Ford Global Technologies, Llc	Adjusting valve lash for an engine with electrically actuated valves
US7204210B2 (en)	2005-02-01	2007-04-17	Ford Global Technologies, Llc	Reducing power consumption and noise of electrically actuated valves
US7458345B2 (en)	2005-04-15	2008-12-02	Ford Global Technologies, Llc	Adjusting ballistic valve timing
US7640899B2 (en)	2005-04-15	2010-01-05	Ford Global Technologies, Llc	Adjusting electrically actuated valve lift
DE102010045504A1 (de) *	2010-09-15	2012-03-15	Robert Bosch Gmbh	Verfahren zum Ansteuern einer ballistischen Bewegung eines Sperrkörpers eines Ventils
US8807463B1 (en) *	2013-03-14	2014-08-19	Mcalister Technologies, Llc	Fuel injector with kinetic energy transfer armature
DE102014114847A1 (de) *	2014-10-14	2016-04-14	Hilite Germany Gmbh	Elektromagnetischer Aktuator für einen Nockenwellenversteller
DE102015111561A1 (de) *	2015-07-16	2017-01-19	Rausch & Pausch Gmbh	Elektromagnetisch betätigtes schaltventil
CN109630741A (zh) *	2018-12-30	2019-04-16	珠海市广源信科技有限公司	一种电磁阀用消音器

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US6198370B1 (en) *	1996-12-13	2001-03-06	Fev Motorentechnik Gmbh & Co. Kg	Method and apparatus for operating a cylinder valve with an electromagnetic actuator without pole face contacting
EP1174595A1 (de) *	2000-07-18	2002-01-23	Peugeot Citroen Automobiles SA	Ventilaktuator in einer Brennkraftmaschine

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JP3134724B2 (ja)	1995-02-15	2001-02-13	トヨタ自動車株式会社	内燃機関の弁駆動装置
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JP2002115515A (ja) *	2000-10-06	2002-04-19	Nissan Motor Co Ltd	電磁駆動弁用アクチュエータ及び内燃機関の動弁装置、並びに弁体の電磁駆動方法
JP2002130510A (ja)	2000-10-18	2002-05-09	Toyota Motor Corp	電磁駆動弁
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2003
- 2003-02-18 FR FR0301944A patent/FR2851367B1/fr not_active Expired - Fee Related
2004
- 2004-02-17 AT AT04300086T patent/ATE366865T1/de not_active IP Right Cessation
- 2004-02-17 US US10/780,153 patent/US7146943B2/en active Active
- 2004-02-17 EP EP04300086A patent/EP1450013B1/de not_active Expired - Lifetime
- 2004-02-17 JP JP2004040035A patent/JP5025889B2/ja not_active Expired - Fee Related
- 2004-02-17 DE DE602004007420T patent/DE602004007420T2/de not_active Expired - Lifetime
- 2004-02-17 ES ES04300086T patent/ES2286573T3/es not_active Expired - Lifetime

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6198370B1 (en) *	1996-12-13	2001-03-06	Fev Motorentechnik Gmbh & Co. Kg	Method and apparatus for operating a cylinder valve with an electromagnetic actuator without pole face contacting
EP1174595A1 (de) *	2000-07-18	2002-01-23	Peugeot Citroen Automobiles SA	Ventilaktuator in einer Brennkraftmaschine

Also Published As

Publication number	Publication date
DE602004007420D1 (de)	2007-08-23
JP2005201231A (ja)	2005-07-28
FR2851367A1 (fr)	2004-08-20
ES2286573T3 (es)	2007-12-01
US20040206319A1 (en)	2004-10-21
EP1450013A3 (de)	2005-03-30
ATE366865T1 (de)	2007-08-15
DE602004007420T2 (de)	2007-10-31
FR2851367B1 (fr)	2008-02-29
EP1450013B1 (de)	2007-07-11
US7146943B2 (en)	2006-12-12
JP5025889B2 (ja)	2012-09-12

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