EP0133445B1 - Valve arrangement - Google Patents

Valve arrangement Download PDF

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Publication number
EP0133445B1
EP0133445B1 EP19840103882 EP84103882A EP0133445B1 EP 0133445 B1 EP0133445 B1 EP 0133445B1 EP 19840103882 EP19840103882 EP 19840103882 EP 84103882 A EP84103882 A EP 84103882A EP 0133445 B1 EP0133445 B1 EP 0133445B1
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EP
European Patent Office
Prior art keywords
valve arrangement
valve
arrangement according
chamber
closure element
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.)
Expired
Application number
EP19840103882
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German (de)
French (fr)
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EP0133445A2 (en
EP0133445A3 (en
Inventor
Stephan Wietschorke
Gerhard Ruschek
Andreas Sausner
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Mannesmann VDO AG
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Mannesmann VDO AG
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Publication of EP0133445A2 publication Critical patent/EP0133445A2/en
Publication of EP0133445A3 publication Critical patent/EP0133445A3/en
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Publication of EP0133445B1 publication Critical patent/EP0133445B1/en
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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
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
    • F02M3/075—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed the valve altering the fuel conduit cross-section being a slidable valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87523—Rotary valve
    • Y10T137/87531—Butterfly valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87539—Having guide or restrictor

Definitions

  • the invention relates to a valve arrangement for regulating the idling speed of internal combustion engines by controlling the amount of air on the intake side of an intake line leading to the internal combustion engine, with an electromechanical actuator which has a lifting magnet, by means of which a closing element can be moved in the opening direction against the force of a return spring, against the force of a return spring , wherein the closing member is acted upon in the opening direction by the pressure of the inlet side and the inlet side is connected to a chamber which has a movable wall which is connected to the rear side of the closing member at least during its opening stroke.
  • Such valve arrangements serve to keep the idle speed of the engine as low as possible, but at the same time to regulate it so that with additional loads, such as. B. by auxiliary units, the idle speed does not decrease until the engine stalls.
  • a linear current is applied to the solenoid, which among other things. is formed as a function of the actual speed and which causes such an adjustment of the closing element that the actual speed reaches a predetermined target speed largely independently of disturbance variables.
  • the actuator When the solenoid is de-energized, the actuator, and with it the closing element, is moved by the return spring either to the fully open or to the fully closed position. This is the case if no current is applied to the solenoid outside of the driving mode. This can also occur due to a defect in which the power supply to the solenoid is interrupted.
  • a valve arrangement for regulating the idling speed of internal combustion engines which has an electromagnetic actuator arranged in a bypass that bypasses the throttle valve in the outlet connection with a pull magnet, by means of which a closing member can be moved in the closing direction against the force of a return spring is.
  • a valve arrangement for regulating the idle speed is known, which is arranged in a bypass bypassing a throttle valve in the intake manifold.
  • the closing element of the valve arrangement is a movable wall dividing a chamber, which can be acted upon on both sides by the pressure of the inlet side. Furthermore, the closing member is spring-loaded in the opening direction.
  • the side of the closing element which can be acted upon in the closing direction can be connected to the suction side via a normally open solenoid valve, so that the bypass is completely open in the event of failure of the solenoid valve, which leads to a maximum speed of the motor.
  • the object of the invention is therefore to provide a valve arrangement according to the preamble, which ensures the lowest possible idling speed with a simple structure in the event of failure of the lifting magnet, but always sufficiently high to prevent the engine from stopping.
  • the chamber is connected to the suction side via a valve which is open when the solenoid is de-energized and is closed during a control process when the solenoid is activated.
  • the valve is preferably a solenoid valve, it being particularly favorable if the solenoid valve can be energized by the actuating current of the lifting magnet. This automatically closes the solenoid valve when the solenoid is energized during a control process.
  • actuating element is a lifting rod connected to the movable core of the lifting magnet.
  • the movable wall can be formed by the closing member.
  • the movable wall is a membrane arranged between the closing member and the wall of the chamber.
  • a throttle valve 2 is rotatably arranged in an intake line 1 leading to an internal combustion engine (not shown).
  • the area in front of the throttle valve is via a by-pass 3. 2 connectable to the area behind the throttle valve 2.
  • the passage of the by-pass 3 can be more or less blocked by a valve arrangement in that a closing member 4 can be moved towards a valve seat 5.
  • the closing member 4 is axially displaceable between a rest position and a working position and is connected to the lifting rod 6 which carries a core 9 of a lifting magnet 7 and which is loaded in the closing direction by a return spring 8. When energized, the lifting rod 6 is moved more or less against the force of the return spring 8 in the opening direction.
  • a chamber 10 On the side of the closing member 4 facing away from the valve seat 5, a chamber 10 is arranged, the wall of which facing the valve seat 5 is a movable wall designed as a membrane 11. This membrane 11 is connected with its central region to the closing member 4, so that the pressure prevailing in the chamber 10 also acts on the closing member 4.
  • the active side of the closing element 4 on the inlet side and the active surface of the membrane 11 are approximately the same size.
  • the inlet side of the closing element 4 is connected to the chamber 10 via channels 12 formed in the closing element 4.
  • the mouths of the channels 12 on the inlet side are protected by a mushroom-like cover 13 against direct axial inflow of air into the channels 12. As a result, these openings of the channels 12 are only open in the radial direction.
  • the chamber 10 is connected via a connection 14 to the suction side of the suction line 1, which connection 14 can be shut off by a solenoid valve 15.
  • the solenoid valve 15, which is open when deenergized, is energized by the actuating current for energizing the solenoid 7 such that the solenoid valve 15 is closed when the solenoid 7 is energized.
  • the cross sections of the channels 12 are in such a size ratio to the cross section of the connection 14 that the force counteracting the inlet pressure causes the closing member 4 to open with a defined air flow rate.
  • the degree of opening changes according to the respective inlet pressure, but the air flow remains constant.
  • the solenoid 7 When idling, the solenoid 7 is acted upon by a control current generated by a controller, so that the core 9 and with it the lifting rod 6 and the closing member 4 are moved away from the valve seat 5 against the force of the return spring 8.
  • the solenoid valve 15 Since the solenoid valve 15 is also energized and closes when the solenoid 7 is energized, the magnetic force of the solenoid 7 is also counteracted by the pressure building up in the chamber 10. This pressure corresponds to the inlet-side pressure on the closing element 4, so that the closing element is formed by the equally large opposite active surfaces of the closing element 4 and the membrane 11. 4 can be moved independently of pressurization.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

Die Erfindung betrifft eine Ventilanordnung zur Regelung der Leerlaufdrehzahl von Verbrennungsmotoren durch Steuerung der Luftmenge auf der Ansaugseite einer zum Verbrennungsmotor führenden Ansaugleitung, mit einem elektromechanischen Stellglied, das einen Hubmagneten aufweist, durch den ein Schließglied über ein Stellelement entgegen der Kraft einer Rückstellfeder in Öffnungsrichtung bewegbar ist, wobei das Schließglied in Öffnungsrichtung vom Druck der Einlaßseite beaufschlagt ist und die Einlaßseite mit einer Kammer verbunden ist, die eine mit der Rückseite des Schließglieds zumindest bei dessen Öffnungshub in Verbindung stehende bewegliche Wand aufweist.The invention relates to a valve arrangement for regulating the idling speed of internal combustion engines by controlling the amount of air on the intake side of an intake line leading to the internal combustion engine, with an electromechanical actuator which has a lifting magnet, by means of which a closing element can be moved in the opening direction against the force of a return spring, against the force of a return spring , wherein the closing member is acted upon in the opening direction by the pressure of the inlet side and the inlet side is connected to a chamber which has a movable wall which is connected to the rear side of the closing member at least during its opening stroke.

Derartige Ventilanordnungen (vrgl. GB-A-2 066 930) dienen dazu, die Leerlaufdrehzahl des Motors möglichst niedrig zu halten, gleichzeitig aber so zu regeln, daß bei zusätzlichen Belastungen, wie z. B. durch Hilfsaggregate die Leerlaufdrehzahl nicht bis zum Absterben des Motors sinkt. Dazu wird der Hubmagnet mit einem Stellstrom beaufschlagt, der u.a. in Abhängigkeit von der Istdrehzahl gebildet wird und der eine solche Verstellung des Schließglieds bewirkt, daß die Istdrehzahl eine vorgegebene Solldrehzahl weitgehend unabhängig von Störgrößen erreicht.Such valve arrangements (see GB-A-2 066 930) serve to keep the idle speed of the engine as low as possible, but at the same time to regulate it so that with additional loads, such as. B. by auxiliary units, the idle speed does not decrease until the engine stalls. For this purpose, a linear current is applied to the solenoid, which among other things. is formed as a function of the actual speed and which causes such an adjustment of the closing element that the actual speed reaches a predetermined target speed largely independently of disturbance variables.

Bei stromlosem Hubmagnet wird das Stellglied und mit ihm das Schließglied durch die Rückstellfeder entweder in die völlig offene oder in die völlig geschlossene Stellung bewegt. Dies ist der Fall, wenn außerhalb des Fahrbetriebs keine Strombeaufschlagung des Hubmagneten erfolgt. Dies kann aber auch durch einen Defekt eintreten, bei dem die Stromversorgung des Hubmagneten unterbrochen wird.When the solenoid is de-energized, the actuator, and with it the closing element, is moved by the return spring either to the fully open or to the fully closed position. This is the case if no current is applied to the solenoid outside of the driving mode. This can also occur due to a defect in which the power supply to the solenoid is interrupted.

Bei den herkömmlichen Ventilanordnungen führt dies dazu, daß der Motor entweder mit einer maximalen Leerlaufdrehzahl oder aber mit einer minimalen Leerlaufdrehzahl mit der Gefahr des Absterbens läuft.In the conventional valve arrangements, this leads to the engine running either at a maximum idling speed or at a minimum idling speed with the risk of stalling.

Aus der OE-A-30 28 898 ist eine Ventilanordnung zur Regelung der Leerlaufdrehzahl von Verbrennungsmotoren bekannt, die ein in einem die Drosselklappe im Ausgangsstutzen umgehenden Bypass angeordnetes elektromagnetisches Stellglied mit einem Zugmagneten aufweist, durch den ein Schließglied entgegen der Kraft einer Rückstellfeder in Schließrichtung bewegbar ist.From OE-A-30 28 898 a valve arrangement for regulating the idling speed of internal combustion engines is known, which has an electromagnetic actuator arranged in a bypass that bypasses the throttle valve in the outlet connection with a pull magnet, by means of which a closing member can be moved in the closing direction against the force of a return spring is.

Dadurch befindet sich bei Ausfall des Zugmagneten das Schließglied in völlig geöffneter Stellung. Dies führt in diesem Zustand zu einer maximalen Drehzahl des Motors.As a result, if the pull magnet fails, the closing element is in the fully open position. In this state, this leads to a maximum speed of the motor.

Weiterhin ist aus der GB-A-20 96 239 eine Ventilanordnung zur Regelung der Leerlaufdrehzahl bekannt, die in einem eine Drosselklappe im Ansaugstutzen umgehenden Bypass angeordnet ist.Furthermore, from GB-A-20 96 239 a valve arrangement for regulating the idle speed is known, which is arranged in a bypass bypassing a throttle valve in the intake manifold.

Das Schließglied der Ventilanordnung ist eine eine Kammer unterteilende bewegliche Wand, die auf beiden Seiten vom Druck der Einlaßseite beaufschlagbar sind. Weiterhin ist das Schließglied in Öffnungsrichtung federbeaufschlagt. Über ein stromlos geöffnetes Magnetventil ist die in Schließrichtung wirksam beaufschlagbare Seite des Schließgliedes mit der Ansaugseite verbindbar, so daß bei Ausfall des Magnetventiles der Bypass völlig offen ist, was zu einer maximalen Drehzahl des Motors führt.The closing element of the valve arrangement is a movable wall dividing a chamber, which can be acted upon on both sides by the pressure of the inlet side. Furthermore, the closing member is spring-loaded in the opening direction. The side of the closing element which can be acted upon in the closing direction can be connected to the suction side via a normally open solenoid valve, so that the bypass is completely open in the event of failure of the solenoid valve, which leads to a maximum speed of the motor.

Aufgabe der Erfindung ist es daher, eine Ventilanordnung nach dem Oberbegriff zu schaffen, die mit einfachem Aufbau bei Ausfall des Hubmagneten eine möglichst niedrige, aber gegen ein Absterben des Motors immer ausreichend hohe Leerlaufdrehzahl sicherstellt.The object of the invention is therefore to provide a valve arrangement according to the preamble, which ensures the lowest possible idling speed with a simple structure in the event of failure of the lifting magnet, but always sufficiently high to prevent the engine from stopping.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Kammer über ein Ventil mit der Ansaugseite verbunden ist, das bei stromlosem Hubmagneten offen ist und während eines Regelvorgangs bei der Aktivierung des Hubmagneten geschlossen wird. Durch diese Ausgestaltung erfolgt während eines Regelvorganges ein Druckausgleich in der Kammer entsprechend dem Druck auf der Einlaßseite, so daß das Maß der Öffnung des Schließglieds nur durch den Ansteuerstrom des Hubmagneten und die ihm entgegenwirkende Federkraft der Rückstellfeder bestimmt ist. Erfolgt kein Regelvorgang, so ist die Kammer mit der einen niedrigeren Druck als die Einlaßseite aufweisenden Ansaugseite verbunden. Dies führt zu einer Aufhebung des Druckausgleichs am Schließglied in dem Sinn, daß der höhere Druck der Einlaßseite das Schließglied entgegen der Kraft der Rückstellfeder so weit in Öffnungsrichtung bewegt, bis die an dem Schließglied angreifenden Kräfte im Gleichgewicht sind. Der Querschnitt dieser Öffnungssteiiung ist so groß, daß eine derart ausreichend hohe Leerlaufdrehzahl sichergestellt ist, daß ein Absterben des Motors vermieden wird.This object is achieved in that the chamber is connected to the suction side via a valve which is open when the solenoid is de-energized and is closed during a control process when the solenoid is activated. With this configuration, a pressure equalization takes place in the chamber in accordance with the pressure on the inlet side during a control process, so that the degree of opening of the closing member is determined only by the actuating current of the lifting magnet and the spring force of the return spring counteracting it. If there is no control process, the chamber is connected to the suction side having a lower pressure than the inlet side. This leads to a cancellation of the pressure compensation on the closing element in the sense that the higher pressure on the inlet side moves the closing element against the force of the return spring in the opening direction until the forces acting on the closing element are balanced. The cross-section of this opening is so large that a sufficiently high idling speed is ensured that the engine will not die.

Dabei ist es unerheblich aus welchem Grund kein Regelvorgang erfolgt. Dies kann z. B. durch Abschalten des Ansteuerstromes aber auch durch einen Defekt des Steuerkreises für den Ansteuerstrom erfolgen.It is irrelevant why there is no control process. This can e.g. B. by switching off the drive current but also due to a defect in the control circuit for the drive current.

Vorzugsweise ist das Ventil ein Magnetventil, wobei es besonders günstig ist, wenn das Magnetventil vom Stellstrom des Hubmagneten bestrombar ist. Dadurch wird automatisch mit der Bestromung des Hubmagneten während eines Regelvorganges auch das Magnetventil geschlossen.The valve is preferably a solenoid valve, it being particularly favorable if the solenoid valve can be energized by the actuating current of the lifting magnet. This automatically closes the solenoid valve when the solenoid is energized during a control process.

Eine einfache Ausbildung wird erreicht, wenn das Stellelement eine mit dem bewegbaren Kern des Hubmagneten verbundene Hubstange ist.A simple design is achieved if the actuating element is a lifting rod connected to the movable core of the lifting magnet.

Die bewegliche Wand kann vom Schließglied gebildet sein.The movable wall can be formed by the closing member.

Eine andere Ausbildung besteht darin, daß die bewegliche Wand eine zwischen dem Schließglied und der Wand der Kammer angeordnete Membran ist.Another embodiment is that the movable wall is a membrane arranged between the closing member and the wall of the chamber.

Auf im Gehäuse der Ventilanordnung schwierig herstellbare Kanäle kann verzichtet werden, wenn die Verbindung der Einlaßseite mit der Kammer aus einem axial im Schließglied ausgebildeten Kanal besteht.Difficult in the valve assembly housing Channels that can be produced can be dispensed with if the connection of the inlet side to the chamber consists of a channel formed axially in the closing member.

Dabei werden durch die Luftströmung hervorgerufene Verfälschungen der Druckverhältnisse auf beiden Seiten des Schließglieds vermieden, wenn die einlaßseitige Mündung des Kanals radial gerichtet ist.Falsifications of the pressure conditions on both sides of the closing element caused by the air flow are avoided if the inlet-side mouth of the channel is directed radially.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Die einzige Figur der Zeichnung zeigt eine erfindungsgemäße Ventilanordnung im Querschnitt.An embodiment of the invention is shown in the drawing and will be described in more detail below. The single figure of the drawing shows a valve arrangement according to the invention in cross section.

In einer zu einem nicht dargestellten Verbrennungsmotor führenden Ansaugleitung 1 ist eine Drosselklappe 2 drehbar angeordnet. Über einen By-pass 3 ist der Bereich vor der Drosselklappe. 2 mit dem Bereich hinter der Drosselklappe 2 verbindbar.A throttle valve 2 is rotatably arranged in an intake line 1 leading to an internal combustion engine (not shown). The area in front of the throttle valve is via a by-pass 3. 2 connectable to the area behind the throttle valve 2.

Der Durchgang des By-passes 3 ist durch eine Ventilanordnung mehr oder weniger dadurch absperrbar, daß ein Schließglied 4 auf einen Ventilsitz 5 zu bewegbar ist.The passage of the by-pass 3 can be more or less blocked by a valve arrangement in that a closing member 4 can be moved towards a valve seat 5.

Beim Aufsitzen des Schließgliedes 4 kann keine Luft über den By-pass 3 direkt von der Atmosphärenseite zur Ansaugseite der Ansaugleitung 1 strömen.When the closing member 4 is seated, no air can flow via the bypass 3 directly from the atmosphere side to the suction side of the suction line 1.

Das Schließglied 4 ist zwischen einer Ruhestellung und einer Arbeitsstellung axial verschiebbar und mit der einen Kern 9 eines Hubmagneten 7 tragenden Hubstange 6 verbunden, die durch eine Rückstellfeder 8 in Schließrichtung belastet ist. Bei Bestromung wird die Hubstange 6 mehr oder weniger entgegen der Kraft der Rückstellfeder 8 in Öffnungsrichtung bewegt.The closing member 4 is axially displaceable between a rest position and a working position and is connected to the lifting rod 6 which carries a core 9 of a lifting magnet 7 and which is loaded in the closing direction by a return spring 8. When energized, the lifting rod 6 is moved more or less against the force of the return spring 8 in the opening direction.

Auf der dem Ventilsitz 5 abgewandten Seite des Schließgliedes 4 ist eine Kammer 10 angeordnet, deren dem Ventilsitz 5 zugewandte Wand eine als Membran 11 ausgebildete bewegliche Wand ist. Diese Membran 11 ist mit ihrem zentrischen Bereich mit dem Schließglied 4 verbunden, so daß der in der Kammer 10 herrschende Druck auch auf das Schließglied 4 wirkt. Die einlaßseitige Wirkfläche des Schließgliedes 4 und die Wirkfläche der Membran 11 sind dabei etwa gleichgroß.On the side of the closing member 4 facing away from the valve seat 5, a chamber 10 is arranged, the wall of which facing the valve seat 5 is a movable wall designed as a membrane 11. This membrane 11 is connected with its central region to the closing member 4, so that the pressure prevailing in the chamber 10 also acts on the closing member 4. The active side of the closing element 4 on the inlet side and the active surface of the membrane 11 are approximately the same size.

Über im Schließglied 4 ausgebildete Kanäle 12 ist die Einlaßseite des Schließgliedes 4 mit der Kammer 10 verbunden. Dabei sind die einlaßseitigen Mündungen der Kanäle 12 durch eine pilzartige Abdeckung 13 gegen direktes axiales Einströmen von Luft in die Kanäle 12 geschützt. Dadurch sind diese Mündungen der Kanäle 12 nur nach radialer Richtung offen.The inlet side of the closing element 4 is connected to the chamber 10 via channels 12 formed in the closing element 4. The mouths of the channels 12 on the inlet side are protected by a mushroom-like cover 13 against direct axial inflow of air into the channels 12. As a result, these openings of the channels 12 are only open in the radial direction.

Die Kammer 10 ist über eine Verbindung 14 mit der Ansaugseite der Ansaugleitung 1 verbunden, wobei diese Verbindung 14 durch ein Magnetventil 15 absperrbar ist.The chamber 10 is connected via a connection 14 to the suction side of the suction line 1, which connection 14 can be shut off by a solenoid valve 15.

Das in unbestromten Zustand offene Magnetventil 15 ist durch den Stellstrom zur Bestromung des Hubmagneten 7.derart bestromt, daß grundsätzlich bei Bestromung des Hubmagneten 7 das Magnetventil 15 geschlossen ist.The solenoid valve 15, which is open when deenergized, is energized by the actuating current for energizing the solenoid 7 such that the solenoid valve 15 is closed when the solenoid 7 is energized.

Die Querschnitte der Kanäle 12 stehen in einem solchen Größenverhältnis zum Querschnitt der Verbindung 14, daß die dem Einlaßdruck entgegenwirkende Kraft eine Öffnung des Schließgliedes 4 mit einem fest definierten Luftdurchsatz bewirkt. Entsprechend dem jeweiligen Einlaßdruck ändert sich somit zwar der Öffnungsgrad, der Luftdurchsatz bleibt aber konstant.The cross sections of the channels 12 are in such a size ratio to the cross section of the connection 14 that the force counteracting the inlet pressure causes the closing member 4 to open with a defined air flow rate. The degree of opening changes according to the respective inlet pressure, but the air flow remains constant.

Bei Leerlaufbetrieb wird der Hubmagnet 7 mit einem von einem Regler erzeugten Stellstrom beaufschlagt, so daß der Kern 9 und mit ihm die Hubstange 6 und das Schließglied 4 entgegen der Kraft der Rückstellfeder 8 vom Ventilsitz 5 wegbewegt werden.When idling, the solenoid 7 is acted upon by a control current generated by a controller, so that the core 9 and with it the lifting rod 6 and the closing member 4 are moved away from the valve seat 5 against the force of the return spring 8.

Da gleichzeitig mit der Bestromung des Hubmagneten 7 auch das Magnetventil 15 bestromt wird und schließt, wirkt der Magnetkraft des Hubmagneten 7 auch der in der Kammer 10 sich aufbauende Druck entgegen. Dieser Druck entspricht dem einlaßseitigen Druck am Schließglied 4, so daß durch die gleichgroßen entgegengesetzten Wirkflächen von Schließglied 4 und Membrane 11 das Schließglied. 4 von Druckbeaufschlagungen unabhängig bewegbar ist.Since the solenoid valve 15 is also energized and closes when the solenoid 7 is energized, the magnetic force of the solenoid 7 is also counteracted by the pressure building up in the chamber 10. This pressure corresponds to the inlet-side pressure on the closing element 4, so that the closing element is formed by the equally large opposite active surfaces of the closing element 4 and the membrane 11. 4 can be moved independently of pressurization.

Claims (8)

1. Valve arrangement for controlling the idling speed of internal combustion engines by controlling the quantity of air at the suction side of an induction conduit leading to the internal combustion engine, with an electromechanical regulating element which comprises a lifting magnet (7) whereby a closure element (4) is movable in the opening direction by means of an adjusting element in opposition to the force of a restoring spring (8), the closure element (4) being acted upon in the opening direction by the inlet side pressure, and the inlet side communicating with a chamber (10) which has a movable wall connected to the rear side of the closure element (4) at least when the latter makes an opening movement, characterised in that the chamber (10) is connected to the suction side through a valve which is open when the lifting magnet (7) is not energised and closed during a control operation when the lifting magnet (7) is actuated.
2. Valve arrangement according to claim 1, characterised in that the valve is a magnetically operated valve (15).
3. Valve arrangement according to claim 2, characterised in that the magnetically operated valve (15) is energisable by the regulating current of the lifting magnet (7).
4. Valve arrangement according to one of the preceding claims, characterised in that the adjusting element is a connecting rod (6) connected to the movable core (9) of the lifting magnet (7).
5. Valve arrangement according to one of the preceding claims, characterised in that the movable wall is formed by the closure element.
6. Valve arrangement according to one of claims 1 to 4, characterised in that the movable wall is a diaphragm (11) situated between the closure element and the wall of the chamber (10).
7. Valve arrangement according to one of the preceding claims, characterised in that the connection between the inlet side and the chamber (10) consists of a duct (12) formed axially in the closure element (4).
8. Valve arrangement according to claim 7, characterised in that the inlet-side mouth of the duct (12) is directed radially.
EP19840103882 1983-08-11 1984-04-07 Valve arrangement Expired EP0133445B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3328950 1983-08-11
DE19833328950 DE3328950A1 (en) 1983-08-11 1983-08-11 VALVE ARRANGEMENT

Publications (3)

Publication Number Publication Date
EP0133445A2 EP0133445A2 (en) 1985-02-27
EP0133445A3 EP0133445A3 (en) 1985-09-18
EP0133445B1 true EP0133445B1 (en) 1987-10-14

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Family Applications (1)

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EP19840103882 Expired EP0133445B1 (en) 1983-08-11 1984-04-07 Valve arrangement

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US (1) US4573441A (en)
EP (1) EP0133445B1 (en)
DE (2) DE3328950A1 (en)

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KR870006308A (en) * 1985-12-10 1987-07-10 미타 가쓰시게 Car idle control device
US4925155A (en) * 1988-07-14 1990-05-15 Crane Electronics, Inc. Control valve and method of controlling material flow through a conduit
US4873954A (en) * 1988-07-27 1989-10-17 Colt Industries Inc. Fail-safe idle bypass system
US4873955A (en) * 1988-09-19 1989-10-17 Colt Industries Inc. Idle air flow shutoff valve
JPH0713504B2 (en) * 1988-09-26 1995-02-15 株式会社日立製作所 Method for improving valve characteristics of engine idle speed control valve
JPH0389959U (en) * 1989-12-29 1991-09-12
US5042448A (en) * 1990-01-10 1991-08-27 Siemens Automotive Limited Idle air bypass
US7778088B2 (en) 2006-12-19 2010-08-17 Spansion Llc Erasing flash memory using adaptive drain and/or gate bias
US7967509B2 (en) 2007-06-15 2011-06-28 S.C. Johnson & Son, Inc. Pouch with a valve

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GB2066930A (en) * 1979-12-12 1981-07-15 Vdo Schindling Apparatus for controlling the idling speed of an internal combustion engine

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Also Published As

Publication number Publication date
EP0133445A2 (en) 1985-02-27
DE3328950A1 (en) 1985-02-28
US4573441A (en) 1986-03-04
EP0133445A3 (en) 1985-09-18
DE3466793D1 (en) 1987-11-19

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