WO2000020731A1 - Actionneur electromagnetique de soupape - Google Patents
Actionneur electromagnetique de soupape Download PDFInfo
- Publication number
- WO2000020731A1 WO2000020731A1 PCT/FR1999/002356 FR9902356W WO0020731A1 WO 2000020731 A1 WO2000020731 A1 WO 2000020731A1 FR 9902356 W FR9902356 W FR 9902356W WO 0020731 A1 WO0020731 A1 WO 0020731A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pallet
- actuator according
- ferromagnetic
- valve
- coil
- Prior art date
Links
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 invention relates to electromagnetic actuators intended to move in translation a valve to bring it alternately into an open position and a closed position. It finds a particularly important application in the control of the valves of an internal combustion engine, with spark or compression ignition.
- the valves of most internal combustion engines are actuated by a camshaft driven by the engine.
- the opening and closing speeds of the valves controlled by the camshaft are low when the engine is at low speed, in particular at start-up, which is unfavorable for filling the combustion chambers.
- the valve-spring assembly constitutes an oscillating system excited by alternating periodic supplies of the electromagnets.
- the electromagnet acting on the pallet in the direction of the opening of the valve begins to be supplied as the vane approaches a location where it comes to stick on the core of the electromagnet.
- the invention aims in particular to provide an electromagnetic actuator which responds better than those previously known to the requirements of practice, in particular because it has a reduced overall dimensions and connections.
- the electromagnetic means comprise a single coil mounted on a ferromagnetic circuit of constitution such that it has, in combination with the pallet, two stable paths of magnetic flux, each corresponding to a low value (generally zero ) air gap.
- One configuration corresponds to full opening and the other to closing.
- the pallet In its initial state, in the middle position, the pallet will generally have an imbalance in position or magnetic circuit which means that the direction in which it will be attracted when the coil is first energized is predetermined. This imbalance can be deliberately caused.
- the elastic return means consist of two springs each placed on one side of the pallet, these two springs can be such that they give the pallet at rest a position in which the force resulting from the supply of the coil is exerted in a determined direction and that they present the same potential energy of compression in the closed and full opening positions.
- An advantageous way of unbalancing the magnetic forces exerted upwards and downwards is to dissymmetry the fluxes in the central part by playing on a sheet notch profile and / or on a pallet profile.
- the pallet may include an axial boss.
- Another way to create an asymmetry consists in giving the poles of the ferromagnetic circuit and the pallet a shape such that the surfaces in contact for the two stable paths are different.
- the single coil actuator is more compact than previous actuators. Its electrical circuit and its control are more simple and less expensive.
- FIG. 1 shows a valve actuator according to one embodiment, in section along a plane passing through the axis of the valve
- FIG. 4 and 5 show variants of Figures 1 to 3;
- FIG. 6 schematically shows the evolution of the oscillations of the pallet when the device is launched.
- the actuator 10 shown in Figures 1 to 3 consists of an assembly intended to be mounted on the cylinder head 12 of an engine. It comprises a housing made up of several pieces 14 and 16 stacked and assembled by means not shown, such as screws. These parts are made of non-ferromagnetic material, for example a light alloy.
- the housing can be fixed on the cylinder head 12 by means of a shim 20 also made of non-ferromagnetic material.
- the actuator comprises a pallet 22 made of ferromagnetic material, advantageously laminated to reduce the losses, fixed on a rod 24 for driving the valve 25.
- a pallet 22 made of ferromagnetic material, advantageously laminated to reduce the losses, fixed on a rod 24 for driving the valve 25.
- several valves are mounted side by side and there is only a small width for each actuator in the direction perpendicular to that of FIG. 1 This leads to giving the palette a rectangular shape.
- the pallet cannot rotate in the part 16.
- the rod 24 can be fixed to the pallet by welding and guided by another ring 26 fixed to an annular extension of the part 16.
- the stem of the valve 25 is separated from the rod 24. It is guided by a ring fixed to the cylinder head and can rotate in the latter.
- Two return springs 28a and 28b are provided to keep the valve at rest in a substantially middle position between the closed position and the fully open position.
- One of the springs 28a is compressed between a plate 30 fixed to the rod 24 and the extension of the part 16.
- the other spring 28b is compressed between a plate 31 fixed to the valve stem and the bottom of the valve well formed in the cylinder head.
- the distribution clearance between the lifted rod and the closed valve guarantees sealing.
- the actuator can just as easily be used with a single spring working in traction / compression and supplemented with an elastic damper ensuring the tightness when the valve is closed, as indicated in French patent No. 98 11 670.
- the rod can then be in one piece with the valve.
- the housing contains a ferromagnetic material core 36, advantageously laminated, delimiting a ferromagnetic circuit with the pallet, and a coil 38 placed in the core.
- the core shown can be in two complementary parts, pressing against each other in a plane 40 ( Figure 2) or in one piece.
- the sheets constituting each half of the core are E-shaped ( Figures 2 and 3).
- the upper branches 42 engage in the coil 36 which they support by through a mandrel 44.
- the two other branches of each half define a volume of movement of the pallet.
- the support of the pallet against the bottom 46 of the volume defines the position of full opening of the valve.
- the ceiling 48 of the volume is at a location relative to the valve seat such that the air gap is practically zero when the valve is closed.
- a central notch 49 corresponding to the rest position of the pallet 22, can be provided in the chamber, of length slightly greater than the thickness of the pallet. Above and below the notch, the volume wall leaves only the clearance necessary for the travel.
- the core may as well be in one piece and wound on an automatic machine, which avoids the presence of an air gap and guarantees the precision of the notches 49.
- the pallet 22, advantageously laminated or of material with high electrical resistivity has bevelled edges parallel to the poles of the core 36 ( Figure 4). In this arrangement, the armature is not magnetically saturated in its operating range and the flow closes, passing mainly through the armature, thanks to the shape of the pole pieces of the core.
- the asymmetry of the upper flow circuit relative to the lower flow circuit is accentuated by different inclinations of the upper 80 and lower 82 polar surfaces of the core, each surface of the pallet opposite a pole being parallel to it.
- the pallet 84 has a central boss in the form of a bar which increases the asymmetry of the magnetic circuit.
- this flux closes on its way through the boss 84, as indicated by the arrow f, which reduces the length of the air gaps.
- this boss is short-circuited and does not weaken the bonding forces. This arrangement significantly reduces the reluctance in the rest position and increases the ease of launching the device.
- the assembly constituted by the pallet, the valve and the spring constitutes an oscillating system having a natural frequency.
- the moving element constituted by the valve and the pallet is alternately drawn up and down, by applying to the coil of electric pulses at a frequency close to the natural frequency of the system.
- the coil 38 is initially supplied for a period corresponding to a fraction of the natural period, which causes a small amplitude displacement of the pallet. If the system has an asymmetry that can be caused:
- the current flowing through the coil 38 can be controlled by observing the position of the pallet 22 using a position sensor integrated in the device.
- the pulses of current in the coil are supplied at times such that, when the force is applied, the speed of the paddle has the same direction as the force applied.
- the initial force being of a given sign, as a result of the asymmetry, it suffices to apply an impulse only once per period.
- Figure 6 schematically shows a phase of the launch of the device.
- the pallet is in a position corresponding to line L, for which the forces exerted by the springs 28a and 28b are balanced. This position is offset from the position L 'for which the electromagnetic force exerted on the pallet 22 by the field created by the coil 38 is zero.
- the first current pulse in the coil 38 causes an elongation of the pallet, which then returns with its own period to a position which generally will be still above that indicated by the line L '.
- the amplitude of the oscillations increases.
- the monitoring of the position signal makes it possible to know at each instant the last duration T which separates two successive zero crossings.
- the process is continued until the range of motion is such that the paddle sticks against the cylinder head. From this moment, and in steady state, it will suffice to supply the coil at full power only during the time required to return the moving element to its extreme position and then to a lower holding current, until the moving element is moved in the other direction.
- the sensor 52 is connected to a computer 50 which controls the supply of the coil 38 by an amplifier 54. This sensor 52 can be carried by the housing 16 and protrude downwards, so as to detect the approximation of the plate 30, made for this purpose of magnetic material. From the output signal from the sensor 52, the computer 50, which can be the engine control computer, determines the position reached by the moving element.
- the sensor 52 also enables, by varying the signal it provides to determine the instant at which the amplitude of the oscillation of the moving element brings in 'the - extreme position.
- the order can be carried out by means of the kind described in patent application FR 98 12940 of the applicant. More generally, launching can be carried out in minimal time thanks to the combination of position measurement and a paddle movement algorithm which controls the current in the coil so as never to generate magnetic braking forces.
- the invention is susceptible of numerous variant embodiments.
- the springs 28a and 28b can be placed, for example, one inside the other to reduce the size of the housing.
- Each coil can consist of a number N of windings greater than 1 (two or three for example) supplied in parallel, which divides by N the resistance and increases the maximum total current and which divides by N the inductance.
- the electrical inertia is reduced.
- the dynamics of the engine system are improved.
- the cutting a winding wire does not disable the device.
- the dynamics are improved: the magnetic field can be varied more quickly, since the inductance / resistance ratio is unchanged while the resistance of each winding is a fraction of the resistance of a single coil: the maximum value of the current is higher and, since the inductance is lower, the dynamics are faster.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electromagnets (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/806,711 US6651954B1 (en) | 1998-10-06 | 1999-10-04 | Electromagnetic valve actuator |
KR1020017004397A KR20010080034A (ko) | 1998-10-06 | 1999-10-04 | 전자 밸브 액추에이터 |
JP2000574813A JP2004506826A (ja) | 1998-10-06 | 1999-10-04 | 電磁バルブアクチュエータ |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/12489 | 1998-10-06 | ||
FR9812489A FR2784222B1 (fr) | 1998-10-06 | 1998-10-06 | Actionneur electromagnetique de soupape |
FR98/12940 | 1998-10-15 | ||
FR9812940A FR2784712B1 (fr) | 1998-10-15 | 1998-10-15 | Procede et dispositif d'actionnement electromagnetique de soupape |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000020731A1 true WO2000020731A1 (fr) | 2000-04-13 |
WO2000020731A9 WO2000020731A9 (fr) | 2003-03-06 |
Family
ID=26234581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002356 WO2000020731A1 (fr) | 1998-10-06 | 1999-10-04 | Actionneur electromagnetique de soupape |
Country Status (6)
Country | Link |
---|---|
US (1) | US6651954B1 (fr) |
EP (1) | EP0992658B1 (fr) |
JP (1) | JP2004506826A (fr) |
KR (1) | KR20010080034A (fr) |
DE (1) | DE69908057T2 (fr) |
WO (1) | WO2000020731A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002062104A (ja) * | 2000-05-23 | 2002-02-28 | Soc Appl Gen Electr Mec <Sagem> | 軸方向に可動なロッドのための軸位置センサー、及びこれが備えられているバルブの電磁アクチュエータ |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2808375B1 (fr) * | 2000-04-27 | 2002-09-06 | Sagem | Actionneur electromagnetique de soupape, de type monobobine |
JP3707354B2 (ja) * | 2000-06-02 | 2005-10-19 | 日産自動車株式会社 | 電磁駆動弁の制御装置 |
JP3617414B2 (ja) * | 2000-06-06 | 2005-02-02 | 日産自動車株式会社 | 電磁駆動弁の制御装置 |
FR2812121B1 (fr) * | 2000-07-21 | 2002-11-08 | Renault | Actionneur lineaire electromagnetique de soupape comportant une seule bobine |
FR2818432B1 (fr) * | 2000-12-20 | 2003-02-14 | Sagem | Actionneur electromagnetique de soupape de moteur a combustion interne |
US6724606B2 (en) | 2002-03-08 | 2004-04-20 | Joseph B. Seale | Single-winding dual-latching valve actuation solenoid |
FR2849466B1 (fr) | 2002-12-27 | 2005-02-18 | Renault Sa | Ationneur lineaire de soupape comportant un aimant mobile dans un entrefer magnetique |
US8083206B2 (en) * | 2008-07-08 | 2011-12-27 | Caterpillar Inc. | Precision ground armature assembly for solenoid actuator and fuel injector using same |
US8947242B2 (en) | 2011-12-15 | 2015-02-03 | Honeywell International Inc. | Gas valve with valve leakage test |
US9846440B2 (en) | 2011-12-15 | 2017-12-19 | Honeywell International Inc. | Valve controller configured to estimate fuel comsumption |
US8905063B2 (en) | 2011-12-15 | 2014-12-09 | Honeywell International Inc. | Gas valve with fuel rate monitor |
US8839815B2 (en) | 2011-12-15 | 2014-09-23 | Honeywell International Inc. | Gas valve with electronic cycle counter |
US9074770B2 (en) | 2011-12-15 | 2015-07-07 | Honeywell International Inc. | Gas valve with electronic valve proving system |
US8899264B2 (en) | 2011-12-15 | 2014-12-02 | Honeywell International Inc. | Gas valve with electronic proof of closure system |
US9995486B2 (en) | 2011-12-15 | 2018-06-12 | Honeywell International Inc. | Gas valve with high/low gas pressure detection |
US9557059B2 (en) | 2011-12-15 | 2017-01-31 | Honeywell International Inc | Gas valve with communication link |
US9851103B2 (en) | 2011-12-15 | 2017-12-26 | Honeywell International Inc. | Gas valve with overpressure diagnostics |
US9835265B2 (en) | 2011-12-15 | 2017-12-05 | Honeywell International Inc. | Valve with actuator diagnostics |
US10422531B2 (en) | 2012-09-15 | 2019-09-24 | Honeywell International Inc. | System and approach for controlling a combustion chamber |
US9234661B2 (en) | 2012-09-15 | 2016-01-12 | Honeywell International Inc. | Burner control system |
EP2868970B1 (fr) | 2013-10-29 | 2020-04-22 | Honeywell Technologies Sarl | Dispositif de régulation |
US10024439B2 (en) | 2013-12-16 | 2018-07-17 | Honeywell International Inc. | Valve over-travel mechanism |
US9841122B2 (en) | 2014-09-09 | 2017-12-12 | Honeywell International Inc. | Gas valve with electronic valve proving system |
US9645584B2 (en) | 2014-09-17 | 2017-05-09 | Honeywell International Inc. | Gas valve with electronic health monitoring |
US9502167B1 (en) | 2015-11-18 | 2016-11-22 | Hamilton Sundstrand Corporation | High temperature electromagnetic actuator |
US10503181B2 (en) | 2016-01-13 | 2019-12-10 | Honeywell International Inc. | Pressure regulator |
US10564062B2 (en) | 2016-10-19 | 2020-02-18 | Honeywell International Inc. | Human-machine interface for gas valve |
US11073281B2 (en) | 2017-12-29 | 2021-07-27 | Honeywell International Inc. | Closed-loop programming and control of a combustion appliance |
US10697815B2 (en) | 2018-06-09 | 2020-06-30 | Honeywell International Inc. | System and methods for mitigating condensation in a sensor module |
CN112178213B (zh) * | 2020-09-30 | 2022-05-06 | 扬州苏油油成商贸实业有限公司 | 高温高压环境电磁阀 |
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DE19518056A1 (de) * | 1995-05-17 | 1996-11-21 | Fev Motorentech Gmbh & Co Kg | Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung |
DE19718038C1 (de) * | 1997-04-29 | 1998-05-07 | Daimler Benz Ag | Elektromagnetischer Aktuator für Gaswechselventile einer Brennkraftmaschine |
JPH10196328A (ja) * | 1997-01-10 | 1998-07-28 | Satoshi Yamada | 磁力で開閉するエンジンのバルブ |
DE19712064A1 (de) * | 1997-03-24 | 1998-10-01 | Braunewell Markus | Elektromagnetischer Antrieb |
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WO1993002905A1 (fr) * | 1991-07-30 | 1993-02-18 | Aura Systems, Inc. | Servomecanisme a gain variable |
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US5515818A (en) * | 1993-12-15 | 1996-05-14 | Machine Research Corporation Of Chicago | Electromechanical variable valve actuator |
US5636601A (en) * | 1994-06-15 | 1997-06-10 | Honda Giken Kogyo Kabushiki Kaisha | Energization control method, and electromagnetic control system in electromagnetic driving device |
JP3186462B2 (ja) * | 1994-09-22 | 2001-07-11 | トヨタ自動車株式会社 | 内燃機関の電磁式弁駆動装置 |
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US5961097A (en) * | 1996-12-17 | 1999-10-05 | Caterpillar Inc. | Electromagnetically actuated valve with thermal compensation |
DE29712502U1 (de) * | 1997-07-15 | 1997-09-18 | Fev Motorentech Gmbh & Co Kg | Elektromagnetischer Aktuator mit Gehäuse |
FR2784712B1 (fr) * | 1998-10-15 | 2001-09-14 | Sagem | Procede et dispositif d'actionnement electromagnetique de soupape |
FR2808375B1 (fr) * | 2000-04-27 | 2002-09-06 | Sagem | Actionneur electromagnetique de soupape, de type monobobine |
-
1999
- 1999-04-09 DE DE69908057T patent/DE69908057T2/de not_active Expired - Fee Related
- 1999-04-09 EP EP99400877A patent/EP0992658B1/fr not_active Expired - Lifetime
- 1999-10-04 KR KR1020017004397A patent/KR20010080034A/ko not_active Application Discontinuation
- 1999-10-04 WO PCT/FR1999/002356 patent/WO2000020731A1/fr not_active Application Discontinuation
- 1999-10-04 US US09/806,711 patent/US6651954B1/en not_active Expired - Fee Related
- 1999-10-04 JP JP2000574813A patent/JP2004506826A/ja not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19518056A1 (de) * | 1995-05-17 | 1996-11-21 | Fev Motorentech Gmbh & Co Kg | Einrichtung zur Steuerung der Ankerbewegung einer elektromagnetischen Schaltanordnung und Verfahren zur Ansteuerung |
JPH10196328A (ja) * | 1997-01-10 | 1998-07-28 | Satoshi Yamada | 磁力で開閉するエンジンのバルブ |
DE19712064A1 (de) * | 1997-03-24 | 1998-10-01 | Braunewell Markus | Elektromagnetischer Antrieb |
DE19718038C1 (de) * | 1997-04-29 | 1998-05-07 | Daimler Benz Ag | Elektromagnetischer Aktuator für Gaswechselventile einer Brennkraftmaschine |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 098, no. 012 31 October 1998 (1998-10-31) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002062104A (ja) * | 2000-05-23 | 2002-02-28 | Soc Appl Gen Electr Mec <Sagem> | 軸方向に可動なロッドのための軸位置センサー、及びこれが備えられているバルブの電磁アクチュエータ |
JP4683765B2 (ja) * | 2000-05-23 | 2011-05-18 | ジョンソン コントロールズ オートモーティブ エレクトロニクス | 軸方向に可動なロッドのための軸位置センサー、及びこれが備えられているバルブの電磁アクチュエータ |
Also Published As
Publication number | Publication date |
---|---|
JP2004506826A (ja) | 2004-03-04 |
US6651954B1 (en) | 2003-11-25 |
EP0992658B1 (fr) | 2003-05-21 |
KR20010080034A (ko) | 2001-08-22 |
WO2000020731A9 (fr) | 2003-03-06 |
DE69908057T2 (de) | 2004-03-18 |
EP0992658A1 (fr) | 2000-04-12 |
DE69908057D1 (de) | 2003-06-26 |
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