EP2220382B1 - Electropneumatic control device comprising a distributing regulator having a magnet section arranged inside a magnet coil - Google Patents

Electropneumatic control device comprising a distributing regulator having a magnet section arranged inside a magnet coil Download PDF

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Publication number
EP2220382B1
EP2220382B1 EP08862685A EP08862685A EP2220382B1 EP 2220382 B1 EP2220382 B1 EP 2220382B1 EP 08862685 A EP08862685 A EP 08862685A EP 08862685 A EP08862685 A EP 08862685A EP 2220382 B1 EP2220382 B1 EP 2220382B1
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EP
European Patent Office
Prior art keywords
control device
magnet
damping
coil
electropneumatic
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EP08862685A
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German (de)
French (fr)
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EP2220382A1 (en
Inventor
Michael Baeuerle
Dirk Hoeffken
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Definitions

  • the invention relates to an electropneumatic control device with an actuator which is connected to a diaphragm, by means of which a pressure chamber for a deviating from ambient pressure working pressure is formed, wherein the actuator is surrounded by a spool for closing or opening of fluid line openings in the actuator and a magnetic coil.
  • the first membrane rod part is further connected to a membrane.
  • the membrane divides a pressure chamber into two different areas.
  • the first region of the two regions is connected via a bore in the first membrane rod part to a ventilation channel.
  • the ventilation channel protrudes through the first membrane rod part into the interior of a control slide.
  • the spool not only surrounds the first diaphragm rod member, but also the second diaphragm rod member. Via overflow openings and a channel in which a first valve is arranged, the ventilation channel is brought into contact with the second region.
  • the second membrane rod part has a venting channel, on the one hand with a negative pressure side in conjunction stands and on the other hand via a further channel, which is closable via a second valve, and is connected via the already known overflow openings with the second region, is in communication.
  • Electro-pneumatic control devices known from the prior art often have the disadvantage that no efficient vibration-technical calming of the spreader slide is achieved.
  • no unacceptably high oscillation amplitude may occur at the control slide in the excitation-relevant frequency range. This is necessary even when vibration acceleration of up to 20 g is expected.
  • the Vibration amplitude is limited even to a few tenths of a millimeter, on the one hand to minimize the air consumption by constantly venting, to reduce the vibration wear and not to stimulate the actuator unnecessarily.
  • a diaphragm rod is used in the prior art.
  • the spool has a magnetic portion for directly damping the movement of the spool and indirectly dampening the movement of the actuator and / or determining the position of the control member, wherein the magnetic portion is disposed within the magnetic coil, a reduction in manufacturing costs is achieved in that at Movement of the spool, and thus also of the magnet portion, specifically eddy currents are induced in the solenoid, which brake the movement of the spool. This also reduces the air consumption. By braking the magnet portion thus also the spool is braked, which causes unwanted vibrations are damped.
  • a closing resistor is arranged parallel to the magnetic coil in a damping and / or position determining circuit.
  • the closing resistor By means of the closing resistor, the induced eddy currents can dissipate very lossy. The spool is thereby efficiently braked.
  • the damping and position determining circuit with appropriate reading, not only can achieve the damping of unwanted vibrations, but also the position of the magnetic portion of the spool with respect to the solenoid learn, which is useful for accurate control of the controlled by the electro-pneumatic control device Machine component is.
  • the magnet portion is formed as a permanent magnet, which is connected via a web to the spool.
  • the magnet section is also not necessary to magnetize the magnet section repeatedly during operation. Any sliding contact points can thus be avoided. A simple construction is the result.
  • the damping and position determining circuit can be further simplified.
  • a primary coil for moving the spool is arranged in the immediate vicinity of the spool. If the primary coil is arranged adjacently to the secondary coil in a further circuit, the electropneumatic control device can be realized in a space-saving manner.
  • the primary coil is formed separately from the secondary coil and is arranged in a circuit separate from the damping and position-determining circuit. This avoids that different fail-out activating means are incorporated in a damping and attitude determination circuit. The reliability in such an embodiment is thus increased.
  • the closing resistance in terms of value in dependence of the inductance and the field strength of the permanent magnet to limit the movement of the spool in the range of preferably 0.1 mm to 0th , 2 mm is set.
  • the transistor output stage is arranged in an engine control unit, an efficient vibration damping can be achieved in a particularly frequent field of application.
  • FIG. 1 an electro-pneumatic control device 1 is shown.
  • the control device has an actuator 2.
  • the actuator 2 is indirectly attached to a membrane 3.
  • the membrane 3 may be formed as a rolling diaphragm and attached by means of a connecting piston 4 to the actuator 2.
  • a control rod 7 is attached on the actuator 2.
  • a pressure different or different from the ambient pressure prevails. The pressure is occasionally lower.
  • a first region in which ambient pressure acts is formed by a protective hood 9 resting against the housing 8 and the membrane 3.
  • the working space is formed by, inter alia, the membrane 3 and the housing 8 and is separated by the membrane 3 and the housing 8 from the first area.
  • the connecting piston 4 is fixed by means of retaining rings 10 on the actuator 2.
  • the actuator 2 is mounted relative to the housing 8 and the protective hood 9 mounted on two plain bearings 11, movable. Between the actuator 2 and the connecting piston 4 seals 12 are provided.
  • the guard 9 is connected to a flange 13 with the housing 8. At this point, one end of the membrane 3 is attached.
  • the provision of the connecting piston 4 and the membrane 3 is achieved via a working spring 14.
  • the working spring 14 is located between the connecting piston 4 and a support ring 15, which is in communication with a connected to the housing 8 magnetic body 16.
  • a spool 17 is slidably disposed.
  • fluid lines 18 are arranged. The fluid lines 18 terminate in fluid line openings 19.
  • At a first end 20 of the actuator 2 there is a ventilation opening 21.
  • the ventilation opening 21 is in contact with an air filter / silencer 22.
  • the actuator 2 also has a first end 20 opposite the second end 23. At this second end 23 there is a vacuum connection, via which the fluid line 18 is connected to a negative pressure region.
  • the fluid line 18 is interrupted by a plug 24.
  • On both sides of the plug 24 are two fluid line openings 19.
  • the spool 17 is arranged to be movable and has two passage openings 25. Alternately, in each case one passage opening can be moved in alignment via one of the fluid line openings located on both sides of the stopper 24. This is achieved by excitation by means of a magnetic coil 26.
  • the solenoid 26 is disposed within the housing 8 and between the magnetic body 16 and a magnetic yoke 27.
  • the spool 17 is movable between two stops 28.
  • a seal by means of an O-ring 30 is realized on the side of a vacuum connection, as seen from the right slide bearing 11.
  • the spool moves on the actuator 2 either to the left or right, resulting in a ventilation or venting of the fluid lines 18 through the overlapable fluid line openings 19 and through holes 25 is achieved.
  • a part of the spool 17 is made magnetized. This slightly magnetically configured section is used as the magnet section 31 in FIG. 1 characterized. It is also possible that the magnet portion 31 includes the entire spool 17. This is in FIG. 2 shown.
  • the solenoid 26 is disposed in a damping and attitude determining circuit 32. Parallel to the magnetic coil 26 while a closing resistor 33 is arranged. Due to the magnetic configuration of the magnet portion 31 of the spool 17, eddy currents in the Dämpfungsund Positioning circuit 32 caused. This is due to the use of the magnetic coil 26. In order that the specifically induced eddy currents, dampen movement of the spool 17, the closing resistance 33 is introduced into the damping and position determining circuit 32. The faster the spool 17 is immersed in the solenoid 26, the higher the voltage produced in the damping and position determining circuit 32.
  • the determination of the position of the magnet portion 31 allows conclusions about the position of the spool 17.
  • the targeted reduction of the eddy currents makes it possible to achieve a damping of vibrations which act on the control slides 17.
  • a second embodiment is in FIG. 3 illustrated and differs mainly in that the magnetic coil 26 is formed as a primary coil 34.
  • the primary coil 34 is responsible for causing the movement of the spool 17.
  • the spool 17 has a web 35 which ensures the connection to the permanent magnet 36 formed as magnetic portion 31.
  • the permanent magnet 36 and the web 35 are integral parts of the spool 17.
  • these three elements are made individually and connected together in a conventional manner. It offers clamping, screw and adhesive connections.
  • the section located below the primary coil 34 and the magnet section 31 arranged within a secondary coil are made of ferromagnetic material, whereas the bridge 35 is formed of light metal.
  • a permanent magnet 36 is understood a conventional permanent magnet.
  • the secondary coil 37 is incorporated in a damping and position determining circuit 32. In this damping and position determining circuit 32 and the closing resistor 33 is connected in parallel to the secondary coil 37.

Abstract

The invention relates to an electropneumatic control device comprising an actuator connected to a membrane by which means a pressure chamber is formed for a working pressure deviating from an environmental pressure, the actuator being surrounded by a distributing regulator for closing fluid line openings in the actuator, and a magnet coil. The distributing regulator comprises a magnet section for damping the movement of the actuator and determining the position of same, said magnet section being arranged inside the magnet coil.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine elektropneumatische Steuervorrichtung mit einem Stellglied, das mit einer Membran verbunden ist, mittels der ein Druckraum für einen vom Umgebungsdruck abweichenden Arbeitsdruck ausgebildet ist, wobei das Stellglied von einem Steuerschieber zum Verschließen oder Öffnen von Fluidleitungsöffnungen im Stellglied und einer Magnetspule umgeben ist.The invention relates to an electropneumatic control device with an actuator which is connected to a diaphragm, by means of which a pressure chamber for a deviating from ambient pressure working pressure is formed, wherein the actuator is surrounded by a spool for closing or opening of fluid line openings in the actuator and a magnetic coil.

Aus dem Stand der Technik, etwa der noch nicht veröffentlichten deutschen Patentanmeldung DE 10 2006 028 015.6 mit Anmeldetag vom 19.06.2006 sind pneumatische Stellantriebe mit integrierter elektropneumatischer Positionsregelung bekannt. Die noch nicht veröffentlichte deutsche Patentanmeldung offenbart einen elektropneumatischen Steller, der ein zweiteiliges Stellglied aufweist. Das Stellglied umfasst ein erstes Membranstangenteil und ein zweites Membranstangenteil. Die beiden Membranstangenteile sind mit einem zweiteiligen Regelschieber verbunden. Der Regelschieber ist von einer Magnetspule umgeben.From the prior art, such as the not yet published German patent application DE 10 2006 028 015.6 with filing date of 19.06.2006 are known pneumatic actuators with integrated electro-pneumatic position control. The not yet published German patent application discloses an electropneumatic actuator having a two-part actuator. The actuator comprises a first diaphragm rod member and a second diaphragm rod member. The two diaphragm rod parts are connected to a two-part control slide. The control slide is surrounded by a magnetic coil.

Das erste Membranstangenteil ist ferner mit einer Membran verbunden. Die Membran teilt einen Druckraum in zwei unterschiedliche Bereiche. Dabei steht der erste Bereich der zwei Bereiche über einer Bohrung im ersten Membranstangenteil mit einem Belüftungskanal in Verbindung. Der Belüftungskanal ragt durch das erste Membranstangenteil bis in das Innere eines Steuerschiebers. Der Steuerschieber umgibt nicht nur das erste Membranstangenteil, sondern auch das zweite Membranstangenteil. Über Überströmöffnungen und einen Kanal, in dem ein erstes Ventil angeordnet ist, ist der Belüftungskanal in Kontakt bringbar mit dem zweiten Bereich. Das zweite Membranstangenteil weist einen Entlüftungskanal auf, der einerseits mit einer Unterdruckseite in Verbindung steht und andererseits über einen weiteren Kanal, der über ein zweites Ventil verschließbar ist, und über die bereits bekannten Überströmöffnungen mit dem zweiten Bereich verbunden ist, in Verbindung steht.The first membrane rod part is further connected to a membrane. The membrane divides a pressure chamber into two different areas. In this case, the first region of the two regions is connected via a bore in the first membrane rod part to a ventilation channel. The ventilation channel protrudes through the first membrane rod part into the interior of a control slide. The spool not only surrounds the first diaphragm rod member, but also the second diaphragm rod member. Via overflow openings and a channel in which a first valve is arranged, the ventilation channel is brought into contact with the second region. The second membrane rod part has a venting channel, on the one hand with a negative pressure side in conjunction stands and on the other hand via a further channel, which is closable via a second valve, and is connected via the already known overflow openings with the second region, is in communication.

Die noch nicht veröffentlichte deutsche Patentanmeldung offenbart somit ein schwingfähiges Feder-Massesystem. Durch äußere oder innere Anregung, z. B. durch Schwingbeschleunigung entstehen erhebliche Schwingungsamplituden der zwei Membranstangenteile, die die Funktion erheblich stören können oder gar zum Versagen führen können. Um dies zu vermeiden, wird im Stand der Technik entweder die Eigenfrequenz möglichst weit aus dem Anregungsspektrum herausgelegt oder es werden Dämpfungsmaßnahmen realisiert. Es wird dabei eine möglichst hohe Eigenfrequenz angestrebt, indem die Massen, welche bewegt werden, möglichst gering gehalten werden. Es wird dann die Federsteifigkeit besonders hoch gewählt.The not yet published German patent application thus discloses an oscillatory spring mass system. By external or internal excitation, z. B. by vibrational acceleration arise significant vibration amplitudes of the two diaphragm rod parts that can significantly disrupt the function or even lead to failure. In order to avoid this, in the prior art either the natural frequency is set as far as possible from the excitation spectrum or damping measures are implemented. The aim is to achieve the highest possible natural frequency by keeping the masses which are moved as low as possible. It is then chosen the spring stiffness particularly high.

Die aus dem Stand der Technik bekannte und noch nicht veröffentlichte Patentanmeldung versucht allerdings eine Dämpfung über eine pneumatische Regelung zu erreichen.However, the known from the prior art and not yet published patent application attempts to achieve a damping via a pneumatic control.

Beide Lösungsmöglichkeiten weisen bisher jedoch diverse Nachteile auf.However, both solutions have so far various disadvantages.

Die Erhöhung der Federsteifigkeit wird mit dem Nachteil begleitet, dass die Betätigungskräfte dann höher werden, was ungewünscht ist. Auch hat das Reduzieren der Massen geometrische Grenzen und findet in der Materialauswahl physikalische Restriktionen. Bekannt ist, dass bei einem elektromagnetischen Steuerschieber, welcher im Kräftegleichgewicht zwischen der Kraft einer Steuerfeder und der Magnetkraft einer Spule zu stehen hat, in Folge der zwingend notwendigen magnetischen Eigenschaft, kein Leichtmetall möglich ist, weswegen die Masse des Feder-Massesystems nicht willkürlich über einen gewissen Wert hinaus reduziert werden kann.The increase of the spring stiffness is accompanied with the disadvantage that the actuating forces are then higher, which is undesirable. Reducing the masses also has geometric limits and finds physical restrictions in the material selection. It is known that in an electromagnetic spool, which has to stand in the balance of power between the force of a control spring and the magnetic force of a coil, due to the mandatory magnetic property, no light metal is possible, which is why the mass of the spring mass system is not arbitrary on a certain value can be reduced.

Aus dem Stand der Technik bekannte elektropneumatische Steuervorrichtungen weisen oft den Nachteil auf, dass keine effiziente schwingungstechnische Beruhigung des Streuerschiebers erreicht wird. Für eine optimale Regelung mittels einer elektropneumatischen Steuervorrichtung darf im anregungsrelevanten Frequenzbereich keine unzulässig hohe Schwingungsamplitude am Steuerschieber auftreten. Dies ist selbst dann notwendig, wenn Schwingungsbeschleunigungen von bis zu 20 g erwartet werden. Die Schwingungsamplitude ist selbst dann auf wenige zehntel Millimeter limitiert, um einerseits den Luftverbrauch durch ständiges Be- und Entlüften zu minimieren, den Schwingungsverschleiß zu reduzieren und das Stellglied nicht unnötig anzuregen. Als typisches Stellglied wird im Stand der Technik eine Membranstange verwendet.Electro-pneumatic control devices known from the prior art often have the disadvantage that no efficient vibration-technical calming of the spreader slide is achieved. For optimum control by means of an electropneumatic control device, no unacceptably high oscillation amplitude may occur at the control slide in the excitation-relevant frequency range. This is necessary even when vibration acceleration of up to 20 g is expected. The Vibration amplitude is limited even to a few tenths of a millimeter, on the one hand to minimize the air consumption by constantly venting, to reduce the vibration wear and not to stimulate the actuator unnecessarily. As a typical actuator, a diaphragm rod is used in the prior art.

Offenbarung der ErfindungDisclosure of the invention

Es ist die Aufgabe der vorliegenden Erfindung, die Nachteile aus dem Stand der Technik zu vermeiden und der Allgemeinheit eine effiziente elektropneumatische Steuervorrichtung zur Verfügung zu stellen.It is the object of the present invention to avoid the disadvantages of the prior art and to provide the general public with an efficient electropneumatic control device.

Diese Aufgabe wird erfindungsgemäß mit einer elektropneumatischen Steuervorrichtung nach Anspruch 1 erreicht. Dadurch, dass der Steuerschieber einen Magnetabschnitt zum direkten Dämpfen der Bewegung des Steuerschiebers und indirektem Dämpfen der Bewegung des Stellgliedes und/oder Bestimmen der Lage des Steuergliedes aufweist, wobei der Magnetabschnitt innerhalb der Magnetspule angeordnet ist, wird eine Verringerung der Herstellkosten dadurch erreicht, dass bei Bewegung des Steuerschiebers, und damit auch des Magnetabschnittes, gezielt Wirbelströme in der Magnetspule induziert werden, welche die Bewegung des Steuerschiebers bremsen. Auch wird dadurch der Luftverbrauch vermindert. Durch Bremsung des Magnetabschnittes wird somit auch der Steuerschieber gebremst, was dazu führt, dass unerwünschte Schwingungen gedämpft werden. Durch Registrierung des Effektes der magnetischen Induktion, wenn der Magnetabschnitt innerhalb der Magnetspule befindlich ist, lässt sich auch eine dezidierte Lagerückmeldung erhalten. Auf diese Weise wird ein Dämpfen unerwünschter Schwingungen in der elektropneumatischen Steuervorrichtung wirkungsvoll erreicht. Als Nebeneffekt stellt sich vorteilhaft heraus, dass keine Erhöhung der Steifigkeit einer Steuerfeder notwendig ist, was eine Erhöhung der Magnetkraft nach sich ziehen würde. Dadurch müsste eine größere Spule mit höherer Windungszahl und dickerem Kupferquerschnitt verwendet werden, was jedoch die Packaging-Kosten erheblich in die Höhe treiben würde. Dies wird in der vorliegenden Erfindung vermieden.This object is achieved according to the invention with an electropneumatic control device according to claim 1. Characterized in that the spool has a magnetic portion for directly damping the movement of the spool and indirectly dampening the movement of the actuator and / or determining the position of the control member, wherein the magnetic portion is disposed within the magnetic coil, a reduction in manufacturing costs is achieved in that at Movement of the spool, and thus also of the magnet portion, specifically eddy currents are induced in the solenoid, which brake the movement of the spool. This also reduces the air consumption. By braking the magnet portion thus also the spool is braked, which causes unwanted vibrations are damped. By registering the effect of the magnetic induction when the magnet portion is located inside the solenoid, a dedicated bearing feedback can also be obtained. In this way, damping of undesired vibrations in the electro-pneumatic control device is effectively achieved. As a side effect, it turns out advantageous that no increase in the stiffness of a control spring is necessary, which would entail an increase in the magnetic force. This would require the use of a larger coil with a higher number of turns and a thicker copper section, which would, however, significantly increase the packaging costs. This is avoided in the present invention.

Im Folgenden werden vorteilhafte Ausführungsformen näher beschrieben, die in den Unteransprüchen auch beansprucht sind.In the following, advantageous embodiments are described in more detail, which are also claimed in the subclaims.

Es ist bspw. von besonderem Vorteil, wenn ein Schließwiderstand parallel zu der Magnetspule in einem Dämpfungs- und/oder Lagebestimmungsschaltkreis angeordnet ist. Mittels des Schließwiderstandes lassen sich die induzierten Wirbelströme stark verlustbehaftet abführen. Der Steuerschieber wird dadurch effizient gebremst. Ferner lässt sich über den Dämpfungs- und Lagebestimmungsschaltkreis, bei entsprechender Auslesung, nicht nur das Dämpfen unerwünschter Schwingungen erreichen, sondern auch die Lage des Magnetabschnittes des Steuerschiebers bzgl. der Magnetspule in Erfahrung bringen, was nützlich für eine genaue Regelung des durch die elektropneumatische Steuervorrichtung gesteuerten Maschinenbauteils ist.It is, for example, particularly advantageous if a closing resistor is arranged parallel to the magnetic coil in a damping and / or position determining circuit. By means of the closing resistor, the induced eddy currents can dissipate very lossy. The spool is thereby efficiently braked. Further, the damping and position determining circuit, with appropriate reading, not only can achieve the damping of unwanted vibrations, but also the position of the magnetic portion of the spool with respect to the solenoid learn, which is useful for accurate control of the controlled by the electro-pneumatic control device Machine component is.

Um eine besonders kostengünstige und robuste Realisierung der Anbindung des Magnetabschnittes an den Steuerschieber zu erreichen, ist es von Vorteil, wenn der Magnetabschnitt als Dauermagnet ausgebildet ist, der über einen Steg mit dem Steuerschieber verbunden ist. Durch Ausbildung des Magnetabschnittes als Dauermagnet, ist es auch nicht notwendig, den Magnetabschnitt während des Betriebes immer wieder zu magnetisieren. Etwaige Schleifkontaktstellen können somit vermieden werden. Eine einfache Bauweise ist die Folge.In order to achieve a particularly cost-effective and robust realization of the connection of the magnet portion to the spool, it is advantageous if the magnet portion is formed as a permanent magnet, which is connected via a web to the spool. By forming the magnet section as a permanent magnet, it is also not necessary to magnetize the magnet section repeatedly during operation. Any sliding contact points can thus be avoided. A simple construction is the result.

Wenn der Schließwiderstand als Teil der den Steuerschieber umgebenden Magnetspule ausgebildet ist, so lässt sich der Dämpfungs- und Lagebestimmungsschaltkreis weiter vereinfachen.If the closing resistance is formed as part of the magnetic coil surrounding the spool, then the damping and position determining circuit can be further simplified.

Zum Ermöglichen einer elektrischen Betätigung des Stellgliedes ist es von Vorteil, wenn zusätzlich zu der den Steuerschieber umgebenden Magnetspule, die als Sekundärspule ausgebildet ist, eine Primärspule zum Bewegen des Steuerschiebers in unmittelbarer Nähe des Steuerschiebers angeordnet ist. Wird die Primärspule angrenzend an die Sekundärspule in einer weiteren Schaltung angeordnet, so lässt sich bauraumeffizient die elektropneumatische Steuervorrichtung realisieren.To enable an electrical actuation of the actuator, it is advantageous if, in addition to the solenoid surrounding the spool, which is designed as a secondary coil, a primary coil for moving the spool is arranged in the immediate vicinity of the spool. If the primary coil is arranged adjacently to the secondary coil in a further circuit, the electropneumatic control device can be realized in a space-saving manner.

So ist es von besonderem Vorteil, wenn die Primärspule separat von der Sekundärspule ausgebildet ist und in einer von dem Dämpfungs- und Lagebestimmungsschaltkreis getrennten Schaltung angeordnet ist. Dadurch wird vermieden, dass in einem Dämpfungsund Lagebestimmungsschaltkreis unterschiedliche ausfallmögliche Aktivierungsmittel eingebaut werden. Die Ausfallsicherheit in einem solchen Ausführungsbeispiel wird somit erhöht. Um den Widerstand dabei so zu dimensionieren, dass gerade eine ausreichende Dämpfung erreicht wird, ohne dass die Verstellzeit zu sehr leidet, ist es in einem weiteren Ausführungsbeispiel von Vorteil, wenn der Schließwiderstand wertmäßig in Abhängigkeit der Induktivität und der Feldstärke des Dauermagneten zur Beschränkung der Bewegung des Steuerschiebers im Bereich von vorzugsweise 0,1 mm bis 0,2 mm festgelegt ist.Thus, it is of particular advantage if the primary coil is formed separately from the secondary coil and is arranged in a circuit separate from the damping and position-determining circuit. This avoids that different fail-out activating means are incorporated in a damping and attitude determination circuit. The reliability in such an embodiment is thus increased. To dimension the resistance so that just a sufficient Damping is achieved without the Verstellzeit suffers too much, it is in another embodiment advantageous if the closing resistance in terms of value in dependence of the inductance and the field strength of the permanent magnet to limit the movement of the spool in the range of preferably 0.1 mm to 0th , 2 mm is set.

Um den Schließwiderstand auf elektronischem Weg in einem Steuergerät, wie etwa einem Motorsteuergerät, variabel nachzubilden, so dass eine betriebspunktabhängige Dämpfung ermöglicht wird, ist es in einem weiteren Ausführungsbeispiel von Vorteil, wenn eine Transistor-Endstufe enthalten ist, die eine betriebspunktabhängige Dämpfung des Steuerschiebers hervorruft. Dadurch kann während einer Sollwertänderung die Dämpfung praktisch komplett entfallen und während einer Stationärphase die Dämpfung zugeschaltet werden. Dies ist etwa beim Anfahren eines Turboladers von großem Vorteil. Auch lässt sich somit eine stufenlos variable Dämpfung als Funktion eines Sollwertgradienten mit besonders wenig Aufwand realisieren.In order to variably emulate the closing resistance electronically in a control device, such as a motor control device, so that an operating-point-dependent damping is made possible, it is advantageous in another embodiment to include a transistor output stage which produces an operating point-dependent damping of the control slide , As a result, the damping can be virtually eliminated during a setpoint change and the damping is switched on during a stationary phase. This is for example when starting a turbocharger of great advantage. Thus, a continuously variable damping as a function of a setpoint gradient can be realized with particularly little effort.

Wenn die Transistor-Endstufe in einem Motor-Steuergerät angeordnet ist, so lässt sich in einem besonders häufig vorkommenden Anwendungsbereich eine effiziente Schwingungsdämpfung erreichen.If the transistor output stage is arranged in an engine control unit, an efficient vibration damping can be achieved in a particularly frequent field of application.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Anhand der Zeichnung wird die Erfindung nachstehend eingehender beschrieben. Es zeigt:

Figur 1
eine schematische Darstellung einer ersten Ausführungsvariante einer elektro- pneumatischen Steuervorrichtung, bei der ein Teil des Steuerschiebers magne- tisch ausgebildet ist und einen Magnetabschnitt bildet,
Figur 2
eine schematische Detaildarstellung des Bereichs des Steuerschiebers inner- halb eines Magnetabschnittes, wobei der Magnetabschnitt in einem Dämpfungs- und Lagebestimmungsschaltkreis eingebunden ist und ein Schließwiderstand parallel zur Magnetspule geschalten ist, und
Figur 3
eine schematische Detaildarstellung einer zweiten Ausführungsvariante, in der neben einer Primärspule, die für den Hub des Steuerschiebers zuständig ist, eine Sekundärspule zuständig ist und der Magnetabschnitt mittels eines Steges an den Steuerschieber angebunden ist und in Wechselbeziehung mit der Se- kundärspule steht.
With reference to the drawing, the invention will be described below in more detail. It shows:
FIG. 1
1 is a schematic representation of a first embodiment of an electro-pneumatic control device, in which a part of the control slide is magnetically formed and forms a magnet section,
FIG. 2
a schematic detail of the portion of the spool within a magnet portion, wherein the magnetic portion is incorporated in a damping and position determining circuit and a closing resistor is connected in parallel to the solenoid, and
FIG. 3
a schematic detail of a second embodiment, in addition to a primary coil, which is responsible for the stroke of the spool, a secondary coil is responsible and the magnet portion is connected by means of a web to the spool and is in correlation with the secondary kundärspule.

Ausführungsformen der ErfindungEmbodiments of the invention

In Figur 1 ist eine elektropneumatische Steuervorrichtung 1 dargestellt. Die Steuervorrichtung weist ein Stellglied 2 auf. Das Stellglied 2 ist mittelbar an einer Membran 3 angebracht. Die Membran 3 kann als Roll-Membran ausgebildet sein und mittels eines Verbindungskolbens 4 an dem Stellglied 2 angebracht sein. An dem Stellglied 2 ist eine Steuerstange 7 angebracht. In einem Arbeitsraum liegt ein vom Umgebungsdruck unterschiedlicher oder gleicher Druck vor. Dabei ist der Druck fallweise auch niedriger.In FIG. 1 an electro-pneumatic control device 1 is shown. The control device has an actuator 2. The actuator 2 is indirectly attached to a membrane 3. The membrane 3 may be formed as a rolling diaphragm and attached by means of a connecting piston 4 to the actuator 2. On the actuator 2, a control rod 7 is attached. In a working room, a pressure different or different from the ambient pressure prevails. The pressure is occasionally lower.

Ein erster Bereich in dem Umgebungsdruck wirkt, wird durch eine am Gehäuse 8 anliegende Schutzhaube 9 und die Membran 3 gebildet. Der Arbeitsraum wird durch unter anderem die Membran 3 und das Gehäuse 8 gebildet und ist durch die Membran 3 und das Gehäuse 8 von dem ersten Bereich getrennt.A first region in which ambient pressure acts is formed by a protective hood 9 resting against the housing 8 and the membrane 3. The working space is formed by, inter alia, the membrane 3 and the housing 8 and is separated by the membrane 3 and the housing 8 from the first area.

Der Verbindungskolben 4 ist mittels Sicherungsringen 10 auf dem Stellglied 2 festgelegt. Das Stellglied 2 ist relativ zu dem Gehäuse 8 und der Schutzhaube 9 auf zwei Gleitlagern 11 gelagert, bewegbar. Zwischen dem Stellglied 2 und dem Verbindungskolben 4 sind Dichtungen 12 vorgesehen.The connecting piston 4 is fixed by means of retaining rings 10 on the actuator 2. The actuator 2 is mounted relative to the housing 8 and the protective hood 9 mounted on two plain bearings 11, movable. Between the actuator 2 and the connecting piston 4 seals 12 are provided.

Die Schutzhaube 9 ist an einer Bördelung 13 mit dem Gehäuse 8 verbunden. An dieser Stelle ist auch ein Ende der Membran 3 befestigt. Die Rückstellung des Verbindungskolbens 4 und der Membran 3 wird über eine Arbeitsfeder 14 erreicht. Dabei befindet sich die Arbeitsfeder 14 zwischen dem Verbindungskolben 4 und einem Stützring 15, der in einem mit dem Gehäuse 8 verbundenen Magnetkörper 16 in Verbindung steht. Auf dem Stellglied 2 ist ein Steuerschieber 17 verschiebbar angeordnet. Im Stellglied 2 sind Fluidleitungen 18 angeordnet. Die Fluidleitungen 18 enden in Fluidleitungsöffnungen 19. An einem ersten Ende 20 des Stellgliedes 2 befindet sich eine Belüftungsöffnung 21. Die Belüftungsöffnung 21 steht mit einem Luftfilter/Schalldämpfer 22 in Kontakt.The guard 9 is connected to a flange 13 with the housing 8. At this point, one end of the membrane 3 is attached. The provision of the connecting piston 4 and the membrane 3 is achieved via a working spring 14. In this case, the working spring 14 is located between the connecting piston 4 and a support ring 15, which is in communication with a connected to the housing 8 magnetic body 16. On the actuator 2, a spool 17 is slidably disposed. In the actuator 2 fluid lines 18 are arranged. The fluid lines 18 terminate in fluid line openings 19. At a first end 20 of the actuator 2 there is a ventilation opening 21. The ventilation opening 21 is in contact with an air filter / silencer 22.

Das Stellglied 2 weist auch ein dem ersten Ende 20 gegenüberliegendes zweites Ende 23 auf. An diesem zweiten Ende 23 liegt ein Unterdruckanschluss vor, über den die Fluidleitung 18 mit einem Unterdruckbereich verbunden ist. Die Fluidleitung 18 ist durch einen Stopfen 24 unterbrochen. Beidseitig des Stopfens 24 befinden sich zwei Fluidleitungsöffnungen 19. Im Bereich dieser beiden Fluidleitungsöffnungen 19 ist der Steuerschieber 17 bewegbar angeordnet und weist zwei Durchgangsöffnungen 25 auf. Abwechselnd ist jeweils eine Durchgangsöffnung fluchtend über eine der beidseitig des Stopfens 24 befindlichen Fluidleitungsöffnungen bewegbar. Dies wird durch Anregung mittels einer Magnetspule 26 erreicht.The actuator 2 also has a first end 20 opposite the second end 23. At this second end 23 there is a vacuum connection, via which the fluid line 18 is connected to a negative pressure region. The fluid line 18 is interrupted by a plug 24. On both sides of the plug 24 are two fluid line openings 19. In the area of these two fluid line openings 19, the spool 17 is arranged to be movable and has two passage openings 25. Alternately, in each case one passage opening can be moved in alignment via one of the fluid line openings located on both sides of the stopper 24. This is achieved by excitation by means of a magnetic coil 26.

Die Magnetspule 26 ist innerhalb des Gehäuses 8 und zwischen dem Magnetkörper 16 und einem Magnetjoch 27 angeordnet. Der Steuerschieber 17 ist dabei zwischen zwei Anschlägen 28 bewegbar. Auf einer Seite des Steuerschiebers 17 ist eine Steuerfeder 29 angeordnet. Aus Dichtigkeitsgründen ist auf der Seite eines Unterdruckanschlusses, relativ vom rechten Gleitlager 11 aus gesehen, eine Dichtung mittels eines O-Rings 30 realisiert.The solenoid 26 is disposed within the housing 8 and between the magnetic body 16 and a magnetic yoke 27. The spool 17 is movable between two stops 28. On one side of the spool 17, a control spring 29 is arranged. For reasons of tightness, a seal by means of an O-ring 30 is realized on the side of a vacuum connection, as seen from the right slide bearing 11.

Bei entsprechender Bestromung der Magnetspule 26 bewegt sich der Steuerschieber auf dem Stellglied 2 entweder nach links oder rechts, was zu einer Belüftung oder Entlüftung der Fluidleitungen 18 durch die in Überlappung bringbaren Fluidleitungsöffnungen 19 und Durchgangsöffnungen 25 erreicht wird.With appropriate energization of the solenoid 26, the spool moves on the actuator 2 either to the left or right, resulting in a ventilation or venting of the fluid lines 18 through the overlapable fluid line openings 19 and through holes 25 is achieved.

In der vorliegenden Erfindung ist ein Teil des Steuerschiebers 17 magnetisiert ausgestaltet. Dieser leicht magnetisch ausgestaltete Abschnitt wird als Magnetabschnitt 31 in Figur 1 gekennzeichnet. Es ist auch möglich, dass der Magnetabschnitt 31 den gesamten Steuerschieber 17 umfasst. Dies ist in Figur 2 dargestellt.In the present invention, a part of the spool 17 is made magnetized. This slightly magnetically configured section is used as the magnet section 31 in FIG FIG. 1 characterized. It is also possible that the magnet portion 31 includes the entire spool 17. This is in FIG. 2 shown.

In den Figuren 2 und 3 werden für die selben Elemente die selben Bezugszeichen verwendet.In the Figures 2 and 3 the same reference numbers are used for the same elements.

Aus Figur 2 ist gut erkennbar, dass die Magnetspule 26 in einem Dämpfungs- und Lagebestimmungsschaltkreis 32 angeordnet ist. Parallel zu der Magnetspule 26 ist dabei ein Schließwiderstand 33 angeordnet. Durch die magnetische Ausgestaltung des Magnetabschnittes 31 des Steuerschiebers 17, werden Wirbelströme in dem Dämpfungsund Lagebestimmungsschaltkreis 32 hervorgerufen. Dies erfolgt aufgrund der Verwendung der Magnetspule 26. Damit die gezielt hervorgerufenen Wirbelströme, eine Bewegung des Steuerschiebers 17 dämpfend abbauen, wird der Schließwiderstand 33 in den Dämpfungs- und Lagebestimmungsschaltkreis 32 eingebracht. Je schneller der Steuerschieber 17 in die Magnetspule 26 eintaucht, desto höher ist die hervorgerufene Spannung im Dämpfungs- und Lagebestimmungsschaltkreis 32. Je tiefer der Magnetabschnitt 31 in die Magnetspule 36 eintaucht, desto mehr verändert sich die Induktivität, wodurch die Lage bestimmt wird. Die Festlegung der Lage des Magnetabschnittes 31 lässt Rückschlüsse auf die Lage des Steuerschiebers 17 zu. Durch den gezielten Abbau der Wirbelströme lässt sich ein Dämpfen von Schwingungen, die auf die Steuerschieber 17 wirken, erreichen.Out FIG. 2 It will be appreciated that the solenoid 26 is disposed in a damping and attitude determining circuit 32. Parallel to the magnetic coil 26 while a closing resistor 33 is arranged. Due to the magnetic configuration of the magnet portion 31 of the spool 17, eddy currents in the Dämpfungsund Positioning circuit 32 caused. This is due to the use of the magnetic coil 26. In order that the specifically induced eddy currents, dampen movement of the spool 17, the closing resistance 33 is introduced into the damping and position determining circuit 32. The faster the spool 17 is immersed in the solenoid 26, the higher the voltage produced in the damping and position determining circuit 32. The deeper the magnetic portion 31 dips into the solenoid 36, the more the inductance changes, thereby determining the position. The determination of the position of the magnet portion 31 allows conclusions about the position of the spool 17. The targeted reduction of the eddy currents makes it possible to achieve a damping of vibrations which act on the control slides 17.

Eine zweite Ausführungsform ist in Figur 3 dargestellt und unterscheidet sich vor allem darin, dass die Magnetspule 26 als Primärspule 34 ausgebildet ist. Die Primärspule 34 ist zuständig für das Hervorrufen der Bewegung des Steuerschiebers 17. Der Steuerschieber 17 weist einen Steg 35 auf, der die Verbindung zu dem als Dauermagnet 36 ausgebildeten Magnetabschnitt 31 sicherstellt. Der Dauermagnet 36 und der Steg 35 sind integrale Bestandteile des Steuerschiebers 17. Es ist jedoch auch möglich, dass diese drei Elemente einzeln hergesellt sind und miteinander auf herkömmliche Weise verbunden werden. Dabei bieten sich Klemm-, Schraub- und Klebeverbindungen an.A second embodiment is in FIG. 3 illustrated and differs mainly in that the magnetic coil 26 is formed as a primary coil 34. The primary coil 34 is responsible for causing the movement of the spool 17. The spool 17 has a web 35 which ensures the connection to the permanent magnet 36 formed as magnetic portion 31. The permanent magnet 36 and the web 35 are integral parts of the spool 17. However, it is also possible that these three elements are made individually and connected together in a conventional manner. It offers clamping, screw and adhesive connections.

Es ist auch möglich, dass der unterhalb der Primärspule 34 befindliche Abschnitt und der innerhalb einer Sekundärspule angeordnete Magnetabschnitt 31 aus ferromagnetischem Material hergestellt ist, wohingegen der Steg 35 aus Leichtmetall geformt ist. Als Dauermagnet 36 wird ein herkömmlicher Permanentmagnet verstanden. Die Sekundärspule 37 ist in einen Dämpfungs- und Lagebestimmungsschaltkreis 32 eingebunden. In diesem Dämpfungs- und Lagebestimmungsschaltkreis 32 ist auch der Schließwiderstand 33 parallel zu der Sekundärspule 37 geschalten.It is also possible that the section located below the primary coil 34 and the magnet section 31 arranged within a secondary coil are made of ferromagnetic material, whereas the bridge 35 is formed of light metal. As a permanent magnet 36 is understood a conventional permanent magnet. The secondary coil 37 is incorporated in a damping and position determining circuit 32. In this damping and position determining circuit 32 and the closing resistor 33 is connected in parallel to the secondary coil 37.

Claims (9)

  1. Electropneumatic control device (1) having an actuating element (2) which is connected to a diaphragm (3) which serves to form a pressure chamber for a working pressure which differs from the ambient pressure, the actuating element (2) being surrounded by a control slide (17) for closing or opening fluid line openings (19) in the actuating element (2), and by a magnet coil (26), characterized in that the control slide (17) has a magnet section (31) for directly damping the movement of the control slide (17) and for indirectly damping the movement of the actuating element (2) and/or for determining the position of the actuating element (2), the magnet section (31) being arranged within the magnet coil (26).
  2. Electropneumatic control device (1) according to Claim 1, a closing resistor (33) being arranged parallel to the magnet coil (26) in a damping and/or position determining circuit (32).
  3. Electropneumatic control device (1) according to Claim 1 or 2, the magnet section (31) being designed as a permanent magnet (36) which is connected to the control slide (17) via a web (35).
  4. Electropneumatic control device (1) according to one of Claims 1 to 3, the closing resistor (33) being formed as part of the magnet coil (26) which surrounds the control slide (17).
  5. Electropneumatic control device (1) according to one of Claims 1 to 4, wherein in addition to the magnet coil (26) which surrounds the control slide (17) and which is designed as a secondary coil (37), a primary coil (34) for moving the control slide (17) is arranged in the direct vicinity of the control slide (17).
  6. Electropneumatic control device (1) according to Claim 5, the primary coil (34) being formed separately from the secondary coil (37) and being arranged in a separate circuit from the damping and position determining circuit (32).
  7. Electropneumatic control device (1) according to one of Claims 3 to 6, the closing resistor (33) being configured in terms of value as a function of the inductivity and the field strength of the permanent magnet so as to restrict the movement of the control slide (17) in the range from preferably 0.1 mm to 0.2 mm.
  8. Electropneumatic control device (1) according to Claim 1, comprising a transistor output stage which generates operating-point-dependent damping of the control slide (17).
  9. Electropneumatic control device (1) according to Claim 8, the transistor output stage being arranged in an engine control unit.
EP08862685A 2007-12-14 2008-11-26 Electropneumatic control device comprising a distributing regulator having a magnet section arranged inside a magnet coil Not-in-force EP2220382B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060225A DE102007060225A1 (en) 2007-12-14 2007-12-14 An electropneumatic control device comprising a spool having a magnet portion disposed within a solenoid
PCT/EP2008/066221 WO2009077298A1 (en) 2007-12-14 2008-11-26 Electropneumatic control device comprising a distributing regulator having a magnet section arranged inside a magnet coil

Publications (2)

Publication Number Publication Date
EP2220382A1 EP2220382A1 (en) 2010-08-25
EP2220382B1 true EP2220382B1 (en) 2011-10-12

Family

ID=40659221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08862685A Not-in-force EP2220382B1 (en) 2007-12-14 2008-11-26 Electropneumatic control device comprising a distributing regulator having a magnet section arranged inside a magnet coil

Country Status (5)

Country Link
EP (1) EP2220382B1 (en)
CN (1) CN101903664B (en)
AT (1) ATE528515T1 (en)
DE (1) DE102007060225A1 (en)
WO (1) WO2009077298A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6277180B2 (en) * 2012-05-03 2018-02-07 ボーグワーナー インコーポレーテッド Exhaust gas turbocharger
KR101933530B1 (en) * 2017-09-05 2018-12-31 하이드로텍(주) Hydraulic central block having variable control damper

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319733A (en) * 1965-07-16 1967-05-16 Gen Motors Corp Vehicle speed responsive control system
US3727517A (en) * 1971-03-03 1973-04-17 Bendix Corp Automatic speed control
JPS5716225A (en) * 1980-07-04 1982-01-27 Hitachi Ltd Internal combustion engine with supercharger
US5755101A (en) * 1996-03-28 1998-05-26 Cummins Engine Company, Inc. Electronic turbocharger wastegate controller
DE102006028015A1 (en) 2006-06-19 2007-12-20 Robert Bosch Gmbh Pneumatic actuator with integrated electro-pneumatic position control

Also Published As

Publication number Publication date
DE102007060225A1 (en) 2009-06-25
WO2009077298A1 (en) 2009-06-25
ATE528515T1 (en) 2011-10-15
EP2220382A1 (en) 2010-08-25
CN101903664B (en) 2014-03-12
CN101903664A (en) 2010-12-01

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