EP1491754A1 - Pneumatic actuator - Google Patents

Pneumatic actuator Download PDF

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Publication number
EP1491754A1
EP1491754A1 EP03013473A EP03013473A EP1491754A1 EP 1491754 A1 EP1491754 A1 EP 1491754A1 EP 03013473 A EP03013473 A EP 03013473A EP 03013473 A EP03013473 A EP 03013473A EP 1491754 A1 EP1491754 A1 EP 1491754A1
Authority
EP
European Patent Office
Prior art keywords
pressure
control
pressure chamber
control box
membrane
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.)
Withdrawn
Application number
EP03013473A
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German (de)
French (fr)
Inventor
Helmut Rodenhauser
Jürgen Tschirschke
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.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Priority to EP03013473A priority Critical patent/EP1491754A1/en
Priority to JP2004082133A priority patent/JP2005016715A/en
Priority to US10/870,835 priority patent/US6968742B2/en
Publication of EP1491754A1 publication Critical patent/EP1491754A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/58—Constructional details of the actuator; Mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/08—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the pneumatic type

Definitions

  • the present invention relates to a control box according to the preamble of claim 1.
  • Control boxes of this type are typically used in the automotive field to translate a control signal into a mechanical movement and to feed it to the part to be controlled.
  • control boxes are used in turbochargers, where, for example, they open and close the valve flap of the exhaust gas bypass in the turbine housing in accordance with the requirements of the driving situation.
  • an overpressure control box consists of an upper chamber 4 and a lower chamber 6, which are separated from one another in a gas-tight manner by a membrane 12.
  • the upper chamber 4 has a control line 10, by means of which either a pressure corresponding to the atmospheric pressure At or an overpressure up to a maximum pressure P max can be set in the upper chamber.
  • the currently set pressure can therefore vary from At to P max .
  • a coil spring 3 is arranged in the lower chamber 6 in such a way that it pushes the membrane upwards.
  • the membrane 12 is connected to a rod 14 in such a way that the rod 14 is pulled or pushed axially in the same direction when the membrane deflects in one or the other direction (up or down).
  • this movement of the rod 14 causes a valve flap 18 to be lowered onto its valve seat 19, thus closing the valve.
  • the force of the spring 3 is chosen to be relatively large, since when using such an overpressure control box to close the bypass valve, a relatively large force has to be applied, since the bypass is relatively low is high pressure, which is formed by the exhaust gas expelled from the cylinders of an internal combustion engine.
  • FIG. 2 A typical known vacuum box is shown in Fig. 2.
  • the vacuum box in Fig. 2 also has an upper chamber 4a and a lower chamber 6a, which are separated from each other by a gas-tight 12a.
  • a control line 10a can be connected to a vacuum source, not shown.
  • the lower chamber is open and is constantly at atmospheric pressure.
  • the spring is arranged in the upper chamber, so that at atmospheric pressure on both sides of the membrane 12a, the spring 3a presses the membrane and with it the rod 14a downward, the valve 18, 19 being opened.
  • Fig. 3 shows such a bi-pressure control box in principle.
  • Upper chamber 4b and lower chamber 6b are also separated from one another in a gas-tight manner by a membrane 12b.
  • the upper chamber has a control line 10b for applying a negative pressure in the upper chamber and the lower chamber has a control line 20 for applying a positive pressure in the lower chamber.
  • the lower chamber 6b is closed by a seal 22, which, however, allows the rod 14b to move axially.
  • the bi-pressure control box according to FIG. 3 combines the advantage of the control box according to FIG. 1 (large closing pressure due to a strong spring) with the advantage of the control box according to FIG. 2 (use of negative pressure), but loses this latter advantage through the additional use of overpressure.
  • FIG. 4 shows the principle of a control box of the invention.
  • control box is separated in a gas-tight manner by means of a membrane 3c into an upper 4c and a lower chamber 6c.
  • the lower chamber has a spring 3c and the upper and the lower chamber have connecting lines 10c, 22c to a vacuum source, not shown.
  • the upper chamber can either be set to atmospheric pressure At, or can be set to negative pressure, and the lower chamber likewise.
  • This spring force can be relatively large, as is desired, but is still supported by the negative pressure in the upper chamber and is not weakened, as in FIG. 1, by the atmospheric pressure set as the minimum pressure for valve closing.
  • control socket of the invention offers the advantage of not requiring overpressure, as the control sockets according to FIGS. 1 and 3 do, and that they are compared to the control socket of FIG 2 has the advantage of using the spring force in the direction of valve closing so that they use a strong spring 1 as in the control box according to FIG. 1, while the control box according to FIG. 2 receives its closing force from the negative pressure alone, and even minus the spring force.
  • FIG. 5 shows a real embodiment of a control box according to the invention in a sectional view, the control box being formed from an upper housing 30 and a lower housing 31.
  • the upper and lower housings are connected to one another by flanging and the edges of the two housings clamp a membrane 38 between them, so that the membrane divides the control box into an upper pressure chamber 32 and a lower pressure chamber 33.
  • the upper pressure chamber 32 can be set to any value between normal pressure and maximum negative pressure by means of a suction line 34 and the lower pressure chamber 33 by means of a suction line 35.
  • the diaphragm 38 is held exactly radially by two plate elements 39 and 40, and if the existing pressure is changed in one of the chambers, the diaphragm yields in one direction or the other in accordance with the new pressure conditions and pulls or pushes the control rod 36 along with it itself, so that a targeted pressure change in one or both of the pressure chambers produces a targeted movement of the control rod.
  • a spiral spring 37 is arranged such that it prestresses the membrane in the direction of a reduction in the size of the upper pressure chamber.
  • the lower housing has an inverted conical pot 41 which serves on the one hand to seat the spiral spring 37 and on the other hand to accommodate a sealing arrangement.
  • the sealing arrangement consists of two bearing elements 42 and 43, which tightly enclose one end of a flexible conical seal 45 between them in the region of a recess 44, while the other end of this seal 45 sealingly engages in a circumferential groove 48 of the control rod under internal stress.
  • the lower bearing element 43 has a recess 46 in which an O-ring seal 47 is arranged, as a result of which the lower pressure chamber is sealed off from the outside, as is by the seal 45.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Supercharger (AREA)
  • Actuator (AREA)

Abstract

A pneumatic servo for operating a switching valve (18, 19), e.g. for a turbocharger in an IC engine, has a sealed housing divided by a flexible membrane into an upper chamber (4c) and a lower chamber (6c). A thrust rod (14c) is attached to the membrane and passes out of the lower chamber via a sliding seal (22a). A spring (3c) in the lower chamber holds the thrust rod in the raised position. The thrust rod is drive by varying the pressures either side of the membrane between atmosphere and a negative value. This provides a fast response valve action with a positive switching mode.

Description

Die vorliegende Erfindung betrifft eine Steuerdose nach dem Oberbegriff des Anspruchs 1.The present invention relates to a control box according to the preamble of claim 1.

Steuerdosen dieser Art werden typischerweise im Automobilbereich eingesetzt um ein Steuersignal in eine mechanische Bewegung zu übersetzen und diese dem zu steuernden Teil zuzuführen.Control boxes of this type are typically used in the automotive field to translate a control signal into a mechanical movement and to feed it to the part to be controlled.

Beispielsweise finden derartige Steuerdosen bei Turboladern Einsatz, wo sie beispielsweise die Ventilklappe des Abgasbypasses im Turbinengehäuse entsprechend den Erfordernissen der Fahrsituation öffnen und schliessen.For example, such control boxes are used in turbochargers, where, for example, they open and close the valve flap of the exhaust gas bypass in the turbine housing in accordance with the requirements of the driving situation.

In diesem Einsatzbereich haben sich die Erfordernisse nach bestimmten Charakteristiken mit der Zeit entsprechend dem Fortschritt der Automobiltechnologie geändert.In this area of application, the requirements for certain characteristics have changed over time in line with the progress of automotive technology.

Man kann diese Evolution etwa wie folgt beschreiben.This evolution can be described as follows.

Zu Beginn der Turboladertechnik wurden sogenannte Überdruck Dosen verwendet. Das Prinzip einer derartigen Überdruckdose ist in Fig. 1 dargestellt.At the beginning of turbocharger technology, so-called positive pressure cans were used. The principle of such an overpressure can is shown in Fig. 1.

Eine Überdrucksteuerdose besteht, wie in Fig. 1 gezeigt, aus einer oberen Kammer 4 und einer unteren Kammer 6, welche durch eine Membran 12 voneinander gasdicht getrennt sind.As shown in FIG. 1, an overpressure control box consists of an upper chamber 4 and a lower chamber 6, which are separated from one another in a gas-tight manner by a membrane 12.

Die obere Kammer 4 weist eine Steuerleitung 10 auf, mittels der in der oberen Kammer entweder ein Druck entsprechend dem atmosphärischen Druck At oder ein Überdruck bis zu einem maximalen Druck Pmax eingestellt werden kann.The upper chamber 4 has a control line 10, by means of which either a pressure corresponding to the atmospheric pressure At or an overpressure up to a maximum pressure P max can be set in the upper chamber.

Der augenblicklich eingestellte Druck kann daher von At bis Pmax variieren.The currently set pressure can therefore vary from At to P max .

In der unteren Kammer 6, die bei 8 offen ist, herrscht konstant atmosphärischer Druck At.In the lower chamber 6, which is open at 8, there is constant atmospheric pressure At.

Eine Spiralfeder 3 ist derart in der unteren Kammer 6 angeordnet, dass sie die Membran nach oben drückt.A coil spring 3 is arranged in the lower chamber 6 in such a way that it pushes the membrane upwards.

Die Membran 12 ist mit einer Stange 14 derart verbunden, dass die Stange 14 bei Ausweichen der Membran in die eine oder andere Richtung (nach oben oder unten), in die gleiche Richtung axial mitgezogen oder -geschoben wird.The membrane 12 is connected to a rod 14 in such a way that the rod 14 is pulled or pushed axially in the same direction when the membrane deflects in one or the other direction (up or down).

Wenn in der oberen Kammer atmosphärischer Druck At herrscht, so herrscht auf beiden Seiten der Membran der gleich Druck, also drückt die Feder 3 die Membran nach oben und die Stange 14 wird mit nach oben gezogen.If there is atmospheric pressure At in the upper chamber, the pressure is the same on both sides of the membrane, so the spring 3 pushes the membrane upwards and the rod 14 is pulled upwards.

Wie ferner schematisch dargestellt ist, bewirkt diese Bewegung der Stange 14 ein Absenken einer Ventilklappe 18 auf seinen Ventilsitz 19, womit das Ventil geschlossen wird.As is also shown schematically, this movement of the rod 14 causes a valve flap 18 to be lowered onto its valve seat 19, thus closing the valve.

Die Kraft der Feder 3 ist hierbei relativ gross gewählt, da beim Einsatz einer derartigen Überdrucksteuerdose zum Verschliessen des Bypassventils eine relativ grosse Kraft aufgewendet werden muss, da der Bypass unter relativ hohem Druck steht, der von den aus den Zylindern eines Verbrennungsmotors ausgestossenen Abgases gebildet wird.The force of the spring 3 is chosen to be relatively large, since when using such an overpressure control box to close the bypass valve, a relatively large force has to be applied, since the bypass is relatively low is high pressure, which is formed by the exhaust gas expelled from the cylinders of an internal combustion engine.

In einer derartigen Überdrucksteuerdose ist es nachteilig, dass Überdruck verwendet werden muss, wobei der Überdruck bei Bedarf erst erzeugt werden muss, und daher ein Zeitverlust entsteht.In such an overpressure control box, it is disadvantageous that overpressure has to be used, the overpressure first having to be generated if necessary, and therefore there is a loss of time.

Man ist daher allgemein in der Automobiltechnik mehr zu Unterdrucksteuerdosen übergegangen, da Unterdruck im Motor von anderen Fahrzeugkomponenten her zur Verfügung steht.In general, therefore, in automotive technology, more has been done to vacuum control sockets, since vacuum in the engine is available from other vehicle components.

Eine typische bekannte Unterdruckdose ist in Fig. 2 dargestellt.A typical known vacuum box is shown in Fig. 2.

Die Unterdruckdose in Fig. 2 weist ebenfalls eine obere Kammer 4a und eine untere Kammer 6a auf, die durch eine 12a gasdicht voneinander getrennt sind.The vacuum box in Fig. 2 also has an upper chamber 4a and a lower chamber 6a, which are separated from each other by a gas-tight 12a.

Eine Steuerleitung 10a ist an eine nicht dargestellte Unterdruckquelle anschliessbar. Die untere Kammer ist offen und steht konstant auf atmosphärischen Druck.A control line 10a can be connected to a vacuum source, not shown. The lower chamber is open and is constantly at atmospheric pressure.

In dieser Steuerdose ist die Feder in der oberen Kammer angeordnet, sodass bei atmosphärischem Druck auf beiden Seiten der Membran 12a die Feder 3a die Membran, und mit ihr die Stange 14a nach unten drückt, wobei das Ventil 18, 19 geöffnet wird.In this control box, the spring is arranged in the upper chamber, so that at atmospheric pressure on both sides of the membrane 12a, the spring 3a presses the membrane and with it the rod 14a downward, the valve 18, 19 being opened.

Wird in der oberen Kammer Unterdruck angelegt, so drückt der atmosphärische Druck in der unteren Kammer die Membran gegen die Kraft der Feder nach oben und schliesst so das Ventil 18, 19. Die Kraft, die zum Ventilschliessen zur Verfügung steht wird dabei durch den Unterdruck in der oberen Kammer erzeugt und die zu überwindende Federkraft muss noch hiervon abgezogen werden.If negative pressure is applied in the upper chamber, the atmospheric pressure in the lower chamber pushes the membrane upwards against the force of the spring and thus closes the valve 18, 19. The force that is available for closing the valve is thereby determined by the negative pressure in the upper chamber generated and the spring force to be overcome must be subtracted from this.

Dies bedingt, dass bei grösseren Drücken die Fläche der Membran relativ gross sein muss um die relativ kleine Druckdifferenz zwischen maximal erreichbarem Unterdruck und Atmosphärendruck auf eine grosse Fläche wirken zu lassen um hiermit eine ausreichend grosse Kraft zu erzeugen.This means that at higher pressures the area of the membrane must be relatively large in order to allow the relatively small pressure difference between the maximum achievable vacuum and atmospheric pressure to act on a large area in order to generate a sufficiently large force.

Eine grosse Membranfläche erfordert jedoch eine Vergrösserung der Steuerdose, was aus einsichtlichen Gründen ein Nachteil ist.However, a large membrane area requires the control box to be enlarged, which is a disadvantage for obvious reasons.

Zur Ausräumung dieses Nachteils ist man daher auf ein anderes System übergegangen, und hat die sogenannte Bi-Druck Steuerdose entwickelt.To overcome this disadvantage, a different system has therefore been adopted and the so-called bi-pressure control box has been developed.

Die Fig. 3 zeigt eine derartige Bi-Druck Steuerdose im Prinzip. Obere Kammer 4b und untere Kammer 6b sind ebenfalls durch eine Membran 12b voneinander gasdicht getrennt. Die obere Kammer hat eine Steuerleitung 10b zum Anlegen eines Unterdrucks in der oberen Kammer und die untere Kammer hat eine Steuerleitung 20 zum Anlegen eines Überdrucks in der unteren Kammer.Fig. 3 shows such a bi-pressure control box in principle. Upper chamber 4b and lower chamber 6b are also separated from one another in a gas-tight manner by a membrane 12b. The upper chamber has a control line 10b for applying a negative pressure in the upper chamber and the lower chamber has a control line 20 for applying a positive pressure in the lower chamber.

Die untere Kammer 6b ist durch eine Dichtung 22 verschlossen, welche jedoch eine axiale Bewegung der Stange 14b zulässt. Diese Steuerdose wirkt vorerst wie die Steuerdose nach Fig. 2, besitzt aber zusätzlich die Möglichkeit, durch Anlegen eines Überdrucks in der unteren, abgedichteten Kammer, die Schliesskraft der Stange 14b zu erhöhen, da nun die Kraft der Stange das Produkt aus Membrangrösse und der Druckdifferenz von theoretisch maximal Pmax - V (V =Vakuum) , minus Federkraft ist. Durch den zusätzlichen Überdruckanschluss der Steuerdose der Fig. 3 im Vergleich zur Steuerdose der Fig. 2 wird also die Druckkomponente des Kammerdruckunterschieds vergrössert.The lower chamber 6b is closed by a seal 22, which, however, allows the rod 14b to move axially. This control box initially acts like the control box according to FIG. 2, but additionally has the possibility of increasing the closing force of the rod 14b by applying an overpressure in the lower, sealed chamber, since the force of the rod now produces the product of the membrane size and the pressure difference of theoretically maximum Pmax - V (V = vacuum), minus spring force. Due to the additional pressure connection of the control box of FIG. 3 in comparison to the control box of 2, the pressure component of the chamber pressure difference is thus increased.

Die Bi-Druck Steuerdose nach Fig. 3 vereinigt den Vorteil der Steuerdose nach Fig. 1 (grosser Schliessdruck durch starke Feder) mit dem Vorteil der Steuerdose nach Fig.2, (Verwendung von Unterdruck), verliert diesen letzteren Vorteil aber durch die zusätzliche Verwendung von Überdruck.The bi-pressure control box according to FIG. 3 combines the advantage of the control box according to FIG. 1 (large closing pressure due to a strong spring) with the advantage of the control box according to FIG. 2 (use of negative pressure), but loses this latter advantage through the additional use of overpressure.

Es ist daher Aufgabe der vorliegenden Erfindung eine Steuerdose zu entwerfen, bei der alle Teilvorteile des Standes der Technik vereinigt werden, ohne die Baugrösse zu erhöhen, wobei nur mit Unterdruck gearbeitet wird und wobei dennoch eine grosse Schliesskraft der Stange 14 erreicht wird.It is therefore an object of the present invention to design a control box in which all the partial advantages of the prior art are combined without increasing the size, with only vacuum being used and nevertheless a high closing force of the rod 14 being achieved.

Diese Aufgabe wird durch eine Steuerdose nach dem kennzeichnenden Teil des Anspruchs 1 erfüllt.This object is achieved by a control box according to the characterizing part of claim 1.

Kurze FigurenbeschreibungBrief description of the figures

Die Erfindung wird nun an Hand der Zeichnungen näher erläutert, wobei:

  • Fig.1 bis Fig. 3 Steuerdosen des Standes der Technik in Prinzipdarstellung,
  • Fig. 4 eine Prinzipdarstellung einer Steuerdose nach der vorliegenden Erfindung, und
  • Fig. 5 eine Ansicht einer reellen Steuerdose nach der vorliegenden Erfindung zeigen.
The invention will now be explained in more detail with reference to the drawings, in which:
  • 1 to 3 control sockets of the prior art in a basic illustration,
  • Fig. 4 is a schematic diagram of a control box according to the present invention, and
  • 5 shows a view of a real control socket according to the present invention.

Detaillierte BeschreibungDetailed description

Ausgehend vom in den Fig. 1-3 beschriebenen Stand der Technik zeigt die Fig. 4 das Prinzip einer Steuerdose der Erfindung.Starting from the prior art described in FIGS. 1-3, FIG. 4 shows the principle of a control box of the invention.

Wiederum ist die Steuerdose mittels einer Membran 3c in eine obere 4c und eine untere Kammer 6c gasdicht getrennt. Die untere Kammer weist eine Feder 3c auf und die obere sowie die untere Kammer weisen Anschlussleitungen 10c, 22c zu einer nicht dargestellten Unterdruckquelle auf.Again, the control box is separated in a gas-tight manner by means of a membrane 3c into an upper 4c and a lower chamber 6c. The lower chamber has a spring 3c and the upper and the lower chamber have connecting lines 10c, 22c to a vacuum source, not shown.

Die obere Kammer kann entweder auf Atmosphärendruck At eingestellt, oder auf Unterdruck gesetzt werden und die untere Kammer desgleichen.The upper chamber can either be set to atmospheric pressure At, or can be set to negative pressure, and the lower chamber likewise.

Will man das Ventil 18, 19 unter grosser Kraft schliessen, so muss man eine grosse Federkraft der Feder 3c vorsehen. Diese Federkraft kann relativ gross sein, wie es ja erwünscht ist, sie wird jedoch durch den Unterdruck in der oberen Kammer noch unterstützt und nicht wie in Fig. 1 durch den zum Ventilschliessen als Minimaldruck eingestellten Atmosphärendruck geschwächt.If you want to close the valve 18, 19 with great force, you have to provide a great spring force of the spring 3c. This spring force can be relatively large, as is desired, but is still supported by the negative pressure in the upper chamber and is not weakened, as in FIG. 1, by the atmospheric pressure set as the minimum pressure for valve closing.

Anderseits zum Ventilöffnen muss die Stange 14c nach unten gedrückt werden wobei der in der unteren Kammer einstellbare Unterduck ausreichen muss um die Federkraft um einen kleinen Betrag zu übersteigen, da die Ventile 18, 19 eines Turboladerbypasses wegen des Drucks im Bypass leicht zu öffnen sind.On the other hand, to open the valve, the rod 14c has to be pressed down, the underpressure which can be set in the lower chamber being sufficient to exceed the spring force by a small amount, since the valves 18, 19 of a turbocharger bypass are easy to open because of the pressure in the bypass.

Im Vergleich mit den Steuerdosen des Standes der Technik kann man also sagen, dass die Steuerdose der Erfindung den Vorteil bietet, keinen Überdruck zu benötigen, wie dies die Steuerdosen nach Fig. 1 und Fig. 3 tun, und dass sie gegenüber der Steuerdose der Fig. 2 den Vorteil bietet die Federkraft in Richtung Ventilschliessen einzusetzen, sodass sie eine starke Feder verwenden kann wie in der Steuerdose nach Fig. 1, während die Steuerdose nach Fig. 2 ihre Schliesskraft vom Unterdruck allein, und sogar minus der Federkraft, erhält.In comparison with the control sockets of the prior art, it can thus be said that the control socket of the invention offers the advantage of not requiring overpressure, as the control sockets according to FIGS. 1 and 3 do, and that they are compared to the control socket of FIG 2 has the advantage of using the spring force in the direction of valve closing so that they use a strong spring 1 as in the control box according to FIG. 1, while the control box according to FIG. 2 receives its closing force from the negative pressure alone, and even minus the spring force.

In der Fig.5 ist eine reelle Ausführungsform einer erfindungsgemässen Steuerdose in Schnittansicht dargestellt, wobei die Steuerdose aus einem oberen Gehäuse 30 und einem unteren Gehäuse 31 gebildet wird.5 shows a real embodiment of a control box according to the invention in a sectional view, the control box being formed from an upper housing 30 and a lower housing 31.

Das obere und das untere Gehäuse sind durch Bördeln miteinander verbunden uns die Ränder der beiden Gehäuse klemmen zwischen einander eine Membran 38 ein, sodass die Membran die Steuerdose in eine obere Druckkammer 32 und eine untere Druckkammer 33 unterteilt.The upper and lower housings are connected to one another by flanging and the edges of the two housings clamp a membrane 38 between them, so that the membrane divides the control box into an upper pressure chamber 32 and a lower pressure chamber 33.

Wie prinzipiell unter Fig. 4 erläutert wurde, können die obere Druckkammer 32 mittels einer Saugleitung 34 und die untere Druckkammer 33 mittels einer Saugleitung 35 auf jeden beliebigen Wert zwischen Normaldruck und maximalen Unterdruck eingestellt werden.As was explained in principle under FIG. 4, the upper pressure chamber 32 can be set to any value between normal pressure and maximum negative pressure by means of a suction line 34 and the lower pressure chamber 33 by means of a suction line 35.

Die Membran 38 wird durch zwei Tellerelemente 39 und 40 exakt radial gehalten, und wenn in einer der Kammern der bestehende Druck verändert wird, so weicht die Membran entsprechend den neuen Druckverhältnissen in die eine oder andere Richtung nach und zieht oder schiebt dabei die Steuerstange 36 mit sich, sodass eine gezielte Druckveränderung in einer der beiden oder in beiden Druckkammern eine gezielte Bewegung der Steuerstange produziert.The diaphragm 38 is held exactly radially by two plate elements 39 and 40, and if the existing pressure is changed in one of the chambers, the diaphragm yields in one direction or the other in accordance with the new pressure conditions and pulls or pushes the control rod 36 along with it itself, so that a targeted pressure change in one or both of the pressure chambers produces a targeted movement of the control rod.

Eine Spiralfeder 37 ist derart angeordnet, dass sie die Membran in Richtung auf eine Verkleinerung der oberen Druckkammer vorspannt.A spiral spring 37 is arranged such that it prestresses the membrane in the direction of a reduction in the size of the upper pressure chamber.

Am unteren Ende der unteren Druckkammer besitzt das untere Gehäuse einen umgestülpten konischen Topf 41, der einerseits dem Sitz der Spiralfeder 37 und anderseits der Aufnahme einer Dichtungsanordnung dient.At the lower end of the lower pressure chamber, the lower housing has an inverted conical pot 41 which serves on the one hand to seat the spiral spring 37 and on the other hand to accommodate a sealing arrangement.

Die Dichtungsanordnung besteht aus zwei Lagerelementen 42 und 43, welche zwischen sich im Bereich einer Ausnehmung 44 das eine Ende einer flexiblen konischen Dichtung 45 dicht einschliessen, während das andere Ende dieser Dichtung 45 unter Eigenspannung dichtend in eine Umfangsnut 48 der Steuerstange eingreift.The sealing arrangement consists of two bearing elements 42 and 43, which tightly enclose one end of a flexible conical seal 45 between them in the region of a recess 44, while the other end of this seal 45 sealingly engages in a circumferential groove 48 of the control rod under internal stress.

Ferner weist das untere Lagerelement 43 eine Ausnehmung 46 auf, in dem eine O-Ringdichtung 47 angeordnet ist, wodurch untere Druckraum ebenso wie durch die Dichtung 45 gegen aussen hin abgedichtet wird.Furthermore, the lower bearing element 43 has a recess 46 in which an O-ring seal 47 is arranged, as a result of which the lower pressure chamber is sealed off from the outside, as is by the seal 45.

Die Anordnung der beiden unterschiedlichen Dichtungen ergibt eine sichere Abdichtung des unteren Druckraums 33 bei beweglicher Steuerstange.The arrangement of the two different seals results in a secure sealing of the lower pressure chamber 33 with a movable control rod.

Die Erfindung wurde an Hand einer Steuerdose für ein spezielles Anwendungsbeispiel im Detail beschrieben, es sei jedoch erwähnt, dass Modifikationen zum Anpassen der Steuerdose an andere Erfordernisse aber unter Beibehalt des Erfindungsprinzips durchaus im Bereich der Erfindung liegen.The invention has been described in detail with the aid of a control box for a specific example of use, but it should be mentioned that modifications to adapt the control box to other requirements while maintaining the principle of the invention are entirely within the scope of the invention.

Claims (6)

Steuerdose zum Einsatz für das Übersetzen eines Steuersignals in eine mechanische Bewegung und Zuführung dieser mechanischen Bewegung an eine zu steuernde Komponente, mit einer ersten Druckkammer (4) einer zweiten Druckkammer (6) sowie mit einer Membrane (12) durch welche die erste Druckkammer von der zweiten Druckkammer gasdicht getrennt werden kann, einer Feder, welche die Membrane in einer ersten Richtung beaufschlägt, sowie mit einer Regelstange, welche durch die Bewegung der Membran (12) zu Steuerbewegungen veranlassbar ist, wobei zumindest eine der beiden Druckkammern (4, 6) über Druckleitungen (10, 22) einer, eine Steuerbewegung der Regelstange (14) hervorrufenden Druckänderung veranlassbar ist, dadurch gekennzeichnet, dass die erste Druckkammer (4) und die zweite Druckkammer (6) mittels der Druckleitungen (10c, 22c) mit einer oder mehreren Unterdruckquellen verbindbar sind, und dass die Feder 3c in der zweiten Druckkammer (6) angeordnet ist.Control box for use in translating a control signal into a mechanical movement and supplying this mechanical movement to a component to be controlled, with a first pressure chamber (4), a second pressure chamber (6) and with a membrane (12) through which the first pressure chamber from the second pressure chamber can be separated in a gas-tight manner, a spring which acts on the membrane in a first direction, and with a control rod which can be caused to perform control movements by the movement of the membrane (12), at least one of the two pressure chambers (4, 6) being over Pressure lines (10, 22) of a pressure change causing a control movement of the control rod (14) can be caused, characterized in that the first pressure chamber (4) and the second pressure chamber (6) by means of the pressure lines (10c, 22c) with one or more vacuum sources are connectable, and that the spring 3c is arranged in the second pressure chamber (6). Steuerdose nach Anspruch 1, dadurch gekennzeichnet, dass die Regelstange (14) zur Ausführung von zwei, axial gegenläufigen Steuerbewegungen ausgebildet ist.Control box according to claim 1, characterized in that the control rod (14) is designed to carry out two axially opposite control movements. Steuerdose nach Anspruch 2, dadurch gekennzeichnet, dass die erste Steuerbewegung unter grösserer Kraftbereitstellung durchführbar ist als die zweite, axial gegenläufige Steuerbewegung.Control box according to claim 2, characterized in that the first control movement can be carried out with greater force than the second, axially opposite control movement. Steuerdose nach Anspruch 2, dadurch gekennzeichnet, dass die der Regelstange (14)bereitgestellte Kraft zur Durchführung der ersten Steuerbewegung grössere Kraft, der Kraft der Feder (3c) zuzüglich der auf die Membranfläche wirkenden Druckdifferenz von Minimaldruck im ersten Druckraum und atmosphärischem Druck im zweiten Druckraum entspricht.Control box according to claim 2, characterized in that the force provided to the control rod (14) for carrying out the first control movement is greater, the force of the spring (3c) plus the corresponds to the pressure difference acting on the membrane surface of the minimum pressure in the first pressure chamber and atmospheric pressure in the second pressure chamber. Steuerdose nach Anspruch 2, dadurch gekennzeichnet, dass die der Regelstange (14) bereitgestellte Kraft zur Durchführung der zweiten Steuerbewegung kleinerer Kraft, der auf die Membrane (12) wirkenden Druckdifferenz zwischen atmosphärischem Druck im ersten Druckraum und Minimaldruck im zweiten Druckraum, abzüglich der Kraft der Feder (3c), entspricht.Control box according to claim 2, characterized in that the force provided to the control rod (14) for carrying out the second control movement of smaller force, the pressure difference acting on the diaphragm (12) between atmospheric pressure in the first pressure chamber and minimum pressure in the second pressure chamber, minus the force of the Spring (3c). Steuerdose nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Regelstange (14) aus dem zweiten Druckraum (6) der Steuerdose herausgeführt ist, und wobei die hierzu nötige Öffnung (8) des zweiten Druckraums durch eine Dichtung (22) derart abgedichtet ist, dass eine axial Bewegung de Regelstange (14) bei gleichzeitig dichter zweiten Druckkammer ermöglicht wird.Control box according to one of Claims 1 to 5, characterized in that the control rod (14) is led out of the second pressure chamber (6) of the control box, and the opening (8) of the second pressure chamber required for this is sealed in this way by a seal (22) is that an axial movement of the control rod (14) is made possible with a tight second pressure chamber.
EP03013473A 2003-06-25 2003-06-25 Pneumatic actuator Withdrawn EP1491754A1 (en)

Priority Applications (3)

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EP03013473A EP1491754A1 (en) 2003-06-25 2003-06-25 Pneumatic actuator
JP2004082133A JP2005016715A (en) 2003-06-25 2004-03-22 Control box
US10/870,835 US6968742B2 (en) 2003-06-25 2004-06-17 Control box

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EP (1) EP1491754A1 (en)
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DE102005046126A1 (en) * 2005-09-27 2007-04-05 Volkswagen Ag Actuator for actuating an adjusting element of a bypass flap of a bypass valve of a turbocharger of an engine comprises a pressure chamber connected to ambient pressure via non-return valves
DE102008010992A1 (en) 2007-03-09 2008-09-11 Volkswagen Ag Exhaust gas turbocharger, for an internal combustion motor, has a second pressure chamber connected to the motor air intake path through a valve and a timing valve
DE102008030352A1 (en) 2007-06-29 2009-01-02 Borgwarner Inc., Auburn Hills Valve e.g. turbocharger-exhaust-bypass valve, control device, has electromagnet device brought in operative connection with control shaft in break point, and control rod controlling position of locking element of valve
DE102008030503A1 (en) 2007-06-29 2009-01-02 Borgwarner Inc., Auburn Hills Control device i.e. actuator, for e.g. exhaust gas rear driving valve, has magnet spring device with magnets that are brought in contact with spring in shutting position of valve by tension of spring
DE102007039218A1 (en) 2007-08-20 2009-02-26 Volkswagen Ag Actuator i.e. controlling socket, for waste gate of turbine, has pressure chambers connected with pressure source using pressure lines, and electrically and pneumatically controlled valve systems arranged in respective pressure lines
DE102009022614A1 (en) 2008-06-11 2009-12-17 Borgwarner Inc., Auburn Hills Control device for controlling valve i.e. exhaust-bypass valve, utilized in turbocharger, has control rod that is sealed opposite to housing by sealing mechanism, where sealing mechanism pushes away at support device
DE102009048125A1 (en) * 2009-10-02 2011-04-14 Continental Automotive Gmbh Wastegate arrangement for a turbine, turbine for an exhaust gas turbocharger, exhaust gas turbocharger, motor vehicle and method for operating an exhaust gas turbocharger
DE102010010093A1 (en) 2010-03-04 2011-09-08 Bayerische Motoren Werke Aktiengesellschaft Pneumatic positioning element for controlling bypass flap of exhaust gas recirculation radiator in turbo supercharger, has spring element provided between fluid-transmissive intermediate plate and cabinet bottom
DE102010020579A1 (en) 2010-05-14 2011-11-17 Bayerische Motoren Werke Aktiengesellschaft Pneumatic control element has housing, whose inner volume is divided in two chambers by membrane, where chambers are impinged with same or different pressure
DE112011102288T5 (en) 2010-07-07 2013-05-16 Borgwarner Inc. Valve control device
DE202013010503U1 (en) 2013-11-20 2014-02-20 Borgwarner Inc. control capsule
DE102015218752A1 (en) 2014-12-05 2016-06-23 Borgwarner Inc. control capsule

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US9435630B2 (en) 2010-12-08 2016-09-06 Cts Corporation Actuator and linear position sensor assembly
WO2019198135A1 (en) * 2018-04-09 2019-10-17 三菱重工エンジン＆ターボチャージャ株式会社 Waste gate valve device and turbocharger provided with said waste gate valve device

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046126B4 (en) * 2005-09-27 2016-05-25 Volkswagen Ag Actuator for an actuator
DE102005046126A1 (en) * 2005-09-27 2007-04-05 Volkswagen Ag Actuator for actuating an adjusting element of a bypass flap of a bypass valve of a turbocharger of an engine comprises a pressure chamber connected to ambient pressure via non-return valves
DE102008010992A1 (en) 2007-03-09 2008-09-11 Volkswagen Ag Exhaust gas turbocharger, for an internal combustion motor, has a second pressure chamber connected to the motor air intake path through a valve and a timing valve
DE102008030352A1 (en) 2007-06-29 2009-01-02 Borgwarner Inc., Auburn Hills Valve e.g. turbocharger-exhaust-bypass valve, control device, has electromagnet device brought in operative connection with control shaft in break point, and control rod controlling position of locking element of valve
DE102008030503A1 (en) 2007-06-29 2009-01-02 Borgwarner Inc., Auburn Hills Control device i.e. actuator, for e.g. exhaust gas rear driving valve, has magnet spring device with magnets that are brought in contact with spring in shutting position of valve by tension of spring
DE102008030352B4 (en) * 2007-06-29 2020-10-08 Borgwarner Inc. Valve control device
DE102008030503B4 (en) 2007-06-29 2019-07-11 Borgwarner Inc. Valve control device and method of assembly
DE102007039218A1 (en) 2007-08-20 2009-02-26 Volkswagen Ag Actuator i.e. controlling socket, for waste gate of turbine, has pressure chambers connected with pressure source using pressure lines, and electrically and pneumatically controlled valve systems arranged in respective pressure lines
DE102007039218B4 (en) * 2007-08-20 2017-06-01 Volkswagen Ag Actuator for a wastegate
DE102009022614B4 (en) 2008-06-11 2019-08-01 Borgwarner Inc. Valve control device
DE102009022614A1 (en) 2008-06-11 2009-12-17 Borgwarner Inc., Auburn Hills Control device for controlling valve i.e. exhaust-bypass valve, utilized in turbocharger, has control rod that is sealed opposite to housing by sealing mechanism, where sealing mechanism pushes away at support device
DE102009048125B4 (en) * 2009-10-02 2013-11-07 Continental Automotive Gmbh Wastegate arrangement for a turbine, turbine for an exhaust gas turbocharger, exhaust gas turbocharger for a motor vehicle and method for operating an exhaust gas turbocharger
DE102009048125A1 (en) * 2009-10-02 2011-04-14 Continental Automotive Gmbh Wastegate arrangement for a turbine, turbine for an exhaust gas turbocharger, exhaust gas turbocharger, motor vehicle and method for operating an exhaust gas turbocharger
DE102010010093A1 (en) 2010-03-04 2011-09-08 Bayerische Motoren Werke Aktiengesellschaft Pneumatic positioning element for controlling bypass flap of exhaust gas recirculation radiator in turbo supercharger, has spring element provided between fluid-transmissive intermediate plate and cabinet bottom
DE102010020579A1 (en) 2010-05-14 2011-11-17 Bayerische Motoren Werke Aktiengesellschaft Pneumatic control element has housing, whose inner volume is divided in two chambers by membrane, where chambers are impinged with same or different pressure
DE112011102288T5 (en) 2010-07-07 2013-05-16 Borgwarner Inc. Valve control device
DE202013010503U1 (en) 2013-11-20 2014-02-20 Borgwarner Inc. control capsule
DE102015218752A1 (en) 2014-12-05 2016-06-23 Borgwarner Inc. control capsule

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US20050011269A1 (en) 2005-01-20
US6968742B2 (en) 2005-11-29

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