EP0134310B1 - Valve arrangement for controlling the idling speed of internal-combustion engines - Google Patents

Valve arrangement for controlling the idling speed of internal-combustion engines Download PDF

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Publication number
EP0134310B1
EP0134310B1 EP83112877A EP83112877A EP0134310B1 EP 0134310 B1 EP0134310 B1 EP 0134310B1 EP 83112877 A EP83112877 A EP 83112877A EP 83112877 A EP83112877 A EP 83112877A EP 0134310 B1 EP0134310 B1 EP 0134310B1
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EP
European Patent Office
Prior art keywords
valve arrangement
closing
arrangement according
lifting rod
spring
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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
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EP83112877A
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German (de)
French (fr)
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EP0134310A3 (en
EP0134310A2 (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 date
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Publication of EP0134310A2 publication Critical patent/EP0134310A2/en
Publication of EP0134310A3 publication Critical patent/EP0134310A3/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

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 steep element which has a lifting magnet through which a closing element can be moved against the force of a return spring via an actuating element.
  • Valve arrangements of this type serve to keep the idling speed of the engine as low as possible, but at the same time to regulate it in such a way that with additional loads such as e.g. the idle speed does not drop due to auxiliary units 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 (GB-A-2 066 930, DE-A-1 601 993) .
  • 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.
  • the object of the invention is therefore to provide a valve arrangement not in the preamble which, with a simple structure in the event of failure of the lifting magnet, ensures the lowest possible idling speed, but always sufficiently high against the engine stopping.
  • the closing member between a rest position and a working position is movable relative to the actuator and is in the rest position in a defined partial opening position of the valve passage. If the power supply to the solenoid fails, the components of the valve arrangement automatically move from a working position to their rest position. Since in the rest position the closing element is in a defined partial opening position of the valve passage, which is as small as possible, but is sufficient to ensure that the engine runs smoothly even with additional loads from additional units, a satisfactory idling operation is ensured.
  • the adjusting element is a lifting rod connected to the movable core of the lifting magnet.
  • the relative movement of the closing member to the actuator can be achieved in that the closing member is slidably arranged on the lifting rod. Special guides for the closing element are therefore not necessary.
  • the return spring is preferably acted upon by the return spring in the closing direction.
  • the closing element In order to hold the closing element in a defined position on the lifting rod when the lifting magnet is in a current supply, the closing element can be held in the working position against a stop arranged on the lifting rod.
  • the stroke of movement of the lifting rod can be limited in the closing direction by a stop.
  • the closing member can be acted upon in the closing direction by a compression spring and, in the partial opening position, can be in contact with a stop preventing a further closing movement.
  • the lifting magnet when the lifting magnet is de-energized, the lifting rod is displaced in the closing direction by the return spring until the closing member bears against this stop.
  • the return spring which has a greater force than the compression spring, does not move the lifting rod but the closing member further in the closing direction until the lifting rod also comes to rest against its stop.
  • the stop for the closing member is preferably the one lever arm of a two-armed lever pivotable about a pivot axis, the second lever arm of which can be acted upon by the lifting rod. This has the advantage that when the solenoid is de-energized, the closing movement of the closing member is only possible up to the partially open position. If the current supply is intact, the closing member can move without hindrance until it rests on the valve seat of the valve arrangement.
  • the closing member can be held in the rest position against a stop arranged on the lifting rod and can thus be in the correct partial opening position.
  • the locking element can be connected to the stop via a snap spring and by the snap spring on one side of the snap point of the snap spring against the stop of the idle position and on the other side of the snap point against the Be assigned to the division of labor.
  • An automatic movement of the closing member from the working position in the rest position is achieved in a simple manner in that the closing member can be struck on the valve seat of the valve arrangement and the lifting rod can be moved so far in the closing direction that the snap-in point of the snap-in lever can be overcome and the closing member can be stopped at the rest position is movable.
  • the force of the return spring loading in the closing direction is greater than the force of the snap spring.
  • An automatic movement of the closing member from the rest position into the working position can be achieved in that the closing member can be moved out of the partial opening position against a spring force in the opening direction, which is greater than the application force of the closing member at the connection of the rest position. If the working position is to be taken from the rest position after energizing the solenoid, the solenoid pulls the lifting rod in the opening direction until the snap point is passed. Due to its high spring force, the closing element can only take part in the movement in the opening direction when it is in contact with the working position, since the actuating force of the lifting magnet is then greater than the spring loading of the closing element in the closing direction.
  • an intake line 1 leading to a properly illustrated internal combustion engine is shown, in which a throttle valve 2 is rotatably arranged.
  • the area in front of throttle valve 2 can be connected to the area behind throttle valve 2 via a bypass 3.
  • the passage of the by-pass 3 is more or less shut off by a valve arrangement in that a closing member 4 or 4 'can be moved towards a valve seat 5.
  • the closing member 4 or 4 ' is axially displaceable between a rest position and a working position on the lifting rod 6 carrying a core 9 of a lifting magnet 7 and is loaded by a return spring 8 in the closing direction.
  • the solenoid 7 When the solenoid 7 is energized, the lifting rod 6 is moved more or less against the force of the return spring 8 in the opening direction.
  • the closing member 4 or 4 ' In the working position, which is assumed when the solenoid 7 is energized, the closing member 4 or 4 'is displaced towards the valve seat and is held in contact with a stop 10 of the lifting rod.
  • a lever arm 13 of a two-armed lever pivotable about a pivot axis 14 can be acted upon by the free end 12 of the lifting rod 6.
  • the other lever arm 15 of this lever is provided with a stop 16 against which the closing member 4 can come to rest.
  • the lever with its lever arms 13 and 15 and the stop 16 and the free end 12 of the lifting rod 6 are arranged with respect to one another such that when the solenoid 7 is energized and the closing member 4 is in contact with the stop 10, the end 12 of the lifting rod 6 does not comes to rest on lever arm 13.
  • the closing member 4 can thus come close to resting on the valve seat 5.
  • the free end 12 of the lifting rod 6 acts on the lever arm 13 so that it pivots in the closing direction.
  • the other lever arm 15 pivots in the opening direction and, via its stop 16, keeps the closing member 4 from the valve seat 5 in a partially open position. Since the force of the return spring 8 is greater than the force of the compression spring 11, this position is stably maintained when the solenoid 7 is de-energized.
  • a firmly supported compression spring 20 of higher force than the snap spring 19 is in the closing direction on the closing member 4 '.
  • the compression spring 20 is without tension.
  • the compression spring 20 and the return spring 8 first move together and then only the return spring 8 moves the closing member 4 'in the closing direction until the closing member 4' rests on the valve seat 5.
  • the return spring 8 causes the lifting rod 6 to move further until its end 12 comes to rest against the stop 17. Before this, however, the snap-over point of the snap spring 19 is passed over, so that it acts on the closing member 4 'against the stop 18.

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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)

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 Steilglied, das einen Hubmagneten aufweist, durch den ein Schließglied über ein Stellelement entgegen der Kraft einer Rückstellfeder bewegbar ist.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 steep element which has a lifting magnet through which a closing element can be moved against the force of a return spring via an actuating element.

Derartige Ventilanordnungen 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 Ist-Drehzahl gebildet wird und der eine solche Verstellung des Schließglieds bewirkt, daß die Ist-Drehzahl eine vorgegebene Soll-Drehzahl weitgehend unabhängig von Störgrößen erreicht (GB-A-2 066 930, DE-A-1 601 993).Valve arrangements of this type serve to keep the idling speed of the engine as low as possible, but at the same time to regulate it in such a way that with additional loads such as e.g. the idle speed does not drop due to auxiliary units 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 (GB-A-2 066 930, DE-A-1 601 993) .

Bei stromlosem Hubmagnet wird das Stellglied und mit ihm dss 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.

Aufgabe der Erfindung ist es daher, eine Ventilanordnung nich 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 not in the preamble which, with a simple structure in the event of failure of the lifting magnet, ensures the lowest possible idling speed, but always sufficiently high against the engine stopping.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Schließglied zwischen einer Ruhestellung und einer Arbeitsstellung relativ zum Stellelement bewegbar ist und sich in der Ruhestellung in einer definierten Teilöffnungsstellung des Ventildurchgangs befindet. Bei Ausfall der Bestromung des Hubmagnets bewegen sich die Bauteile der Ventilanordnung automatisch aus einer Arbeitsstellung in ihre Ruhestellung. Da in der Ruhestellung sich das Schließglied in einer definierten Teilöffnungsstellung des Ventildurchgangs befindet, die so gering wie möglich ist, aber ausreicht auch bei zusätzlichen Belestungen durch Zusatzaggregate immer einen einwendfreien Lauf des Motors zu gewährleisten, ist ein befriedigender Leerlaufbetrieb sichergestellt.This object is achieved in that the closing member between a rest position and a working position is movable relative to the actuator and is in the rest position in a defined partial opening position of the valve passage. If the power supply to the solenoid fails, the components of the valve arrangement automatically move from a working position to their rest position. Since in the rest position the closing element is in a defined partial opening position of the valve passage, which is as small as possible, but is sufficient to ensure that the engine runs smoothly even with additional loads from additional units, a satisfactory idling operation is ensured.

In einer einfachen Ausbildung ist das Stellelement eine mit dem bewegbaren Kern des Hubmagneten verbundene Hubstange. Dabei kann die Relativbewegbarkeit des Schließglieds zum Stellglied dadurch erreicht werden, daß das Schließglied verschiebbar auf der Hubstange angeordnet ist. Spezielle Führungen für das Schließglied sind somit nicht nötig.In a simple embodiment, the adjusting element is a lifting rod connected to the movable core of the lifting magnet. The relative movement of the closing member to the actuator can be achieved in that the closing member is slidably arranged on the lifting rod. Special guides for the closing element are therefore not necessary.

Vorzugsweise ist die Hubstange von der Rückstellfeder in Schließrichtung beaufschlagt.The return spring is preferably acted upon by the return spring in the closing direction.

Um das Schließglied bei intakter Bestrombarkeit des Hubmagneten in einer definierten Position an der Hubstange zu halten, kann das Schließglied in der Arbeitsstellung an einem an der Hubstange angeordneten Anschlag in Anlage gehalten sein.In order to hold the closing element in a defined position on the lifting rod when the lifting magnet is in a current supply, the closing element can be held in the working position against a stop arranged on the lifting rod.

Der Bewegungshub der Hubstange kann in Schließrichtung durch einen Anschlag begrenzt sein.The stroke of movement of the lifting rod can be limited in the closing direction by a stop.

In einer einfachen Ausführung kann das Schließglied durch eine Druckfeder in Schließrichtung beaufschlagbar und in der Teilöffnungstellung an einem eine weitere Schließbewegung verhindernden Anschlag in Anlage sein. Damit wird bei stromlosem Hubmagnet die Hubstange durch die Rückstellfeder bis zur Anlage des Schließglieds en diesem Anschlag in Schließrichtung verschoben. Die eine größere Kraft als die Druckfeder aufweisende Rückstellfeder bewegt dann zwar noch die Hubstange nicht aber das Schließglied weiter in Schließrichtung bis auch die Hubstange an ihrem Anschlag zur Anlage kommt.In a simple embodiment, the closing member can be acted upon in the closing direction by a compression spring and, in the partial opening position, can be in contact with a stop preventing a further closing movement. Thus, when the lifting magnet is de-energized, the lifting rod is displaced in the closing direction by the return spring until the closing member bears against this stop. The return spring, which has a greater force than the compression spring, does not move the lifting rod but the closing member further in the closing direction until the lifting rod also comes to rest against its stop.

Der Anschlag für das Schließglied ist vorzugsweise der eine Hebelarm eines um eine Schwenkachse schwenkbaren zweiarmigen Hebels, dessen zweiter Hebelarm von der Hubstange beaufschlagbar ist. Dies hat den Vorteil, daß bei stromlosem Hubmagneten zwar die Schließbewegung des Schließglieds nur bis zur Teilöffnungsstellung möglich ist. Bei intakter Bestromung kann das Schließglied sich aber ohne Behinderung bis zur Auflage auf dem Ventilsitz der Ventilanordnung bewegen.The stop for the closing member is preferably the one lever arm of a two-armed lever pivotable about a pivot axis, the second lever arm of which can be acted upon by the lifting rod. This has the advantage that when the solenoid is de-energized, the closing movement of the closing member is only possible up to the partially open position. If the current supply is intact, the closing member can move without hindrance until it rests on the valve seat of the valve arrangement.

In einer anderen Ausführungsform kann das Schließglied in der Ruhestellung an einem an der Hubstange angeordneten Anschlag in Anlage gehalten sein und so sich in der korrekten Teilöffnungsstellung befinden.In another embodiment, the closing member can be held in the rest position against a stop arranged on the lifting rod and can thus be in the correct partial opening position.

Um das Schließglied entweder in seiner Arbeitsstellung oder seiner Ruhestellung sicher zu halten, kann das Schließglied über eine Schnappfeder mit dem Anschlag verbunden und durch die Schnappfeder auf der einen Seite des Umschnappunktes der Schnappfeder gegen den Anschlag der Ruhestellung und auf der anderen Seite des Umschnappunktes gegen den Anschlag der Arbeitsteilung beaufschlagber sein.In order to hold the locking element securely either in its working position or in its rest position, the locking element can be connected to the stop via a snap spring and by the snap spring on one side of the snap point of the snap spring against the stop of the idle position and on the other side of the snap point against the Be assigned to the division of labor.

Eine selbsttätige Bewegberkeit des Schließglieds aus der Arbeitsstellung in Ruhestellung wird auf einfache Weise dadurch erreicht, daß das Schließglied an dem Ventilsitz der Ventilanordnung anschlagbar und die Hubstange so weit in Schließrichtung bewegbar ist, daß der Umschnappunkt der Schnappfeber überwindbar und das Schließglied an den Anschlag der Ruhestellung bewegbar ist. DabeiAn automatic movement of the closing member from the working position in the rest position is achieved in a simple manner in that the closing member can be struck on the valve seat of the valve arrangement and the lifting rod can be moved so far in the closing direction that the snap-in point of the snap-in lever can be overcome and the closing member can be stopped at the rest position is movable. Here

ist die Kraft der in Schließrichtung belastenden Rückstellfeder größer als die Kraft der Schnappfeder.the force of the return spring loading in the closing direction is greater than the force of the snap spring.

Eine selbsttätige Bewegung des Schließglieds aus der Ruhestellung in die Arbeitsstellung ist dadurch erreichbar, daß das Schließglied aus der Teilöffnungsstellung heraus entgegen einer Federkraft in Öffnungsrichtung bewegbar ist, die größer ist als die Anlegekraft des Schließglieds am Anschlsg der Ruhestellung. Soll aus der Ruhestellung nach Bestromung des Hubmagneten die Arbeitsstellung eingenommen werden, zieht der Hubmagnet die Hubstange solange in Öffnungsrichtung bis der Umschnappunkt überfahren wird. Das Schließglied kann aufgrund seiner hohen Federkraftbelastung die Bewegung in Öffnungsrichtung erst mitmachen, wenn es am Anschlag der Arbeitsstellung anliegt, da dann die Ansteuerkraft des Hubmagneten größer ist als die Federbelastung des Schließglieds in Schließrichtung.An automatic movement of the closing member from the rest position into the working position can be achieved in that the closing member can be moved out of the partial opening position against a spring force in the opening direction, which is greater than the application force of the closing member at the connection of the rest position. If the working position is to be taken from the rest position after energizing the solenoid, the solenoid pulls the lifting rod in the opening direction until the snap point is passed. Due to its high spring force, the closing element can only take part in the movement in the opening direction when it is in contact with the working position, since the actuating force of the lifting magnet is then greater than the spring loading of the closing element in the closing direction.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen

  • Figur 1 ein erstes Ausführungsbeispiel einer erfindungsgemäßen Ventilanordnung
  • Figur 2 ein zweites Ausführungsbeispiel einer erfindungsgemäßen Ventilanordnung
Embodiments of the invention are shown in the drawing and are described in more detail below. Show it
  • Figure 1 shows a first embodiment of a valve assembly according to the invention
  • Figure 2 shows a second embodiment of a valve assembly according to the invention

In den beiden Figuren ist eine zu einem richt dargestellen Verbrennungsmotor führende Ansaugleitung 1 darstellt, in der eine Drosselklappe 2 drehbar angeordnet ist. Über einen By-pass 3 ist der Bereich vor der Drosselklappe 2 mit dem Bereich hinter der Drosselklappe 2 verbindbar.In the two figures, an intake line 1 leading to a properly illustrated internal combustion engine is shown, in which a throttle valve 2 is rotatably arranged. The area in front of throttle valve 2 can be connected to the area behind throttle valve 2 via a bypass 3.

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

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

Das Schließglied 4 bzw. 4' ist zwischen einer Ruhestellung und einer Arbeitsstellung axial verschiebbar auf der einen Kern 9 eines Hubmagneten 7 tragenden Hubstange 6 angeordnet und durch eine Rückstellfeder 8 in Schließrichtung belastet. Bei Bestromung des Hubmagneten 7 wird die Hubstange 6 mehr oder weniger entgegen der Kraft der Rückstellfeder 8 in Öffnungsrichtung bewegt. In der Arbeitsstellung, die bei bestromtem Hubmagneten 7 eingenommen wird, ist das Schließglied 4 bzw. 4' zum Ventilsitz hin verschoben und an einem Anschlag 10 der Hubstange in Anlage gehalten.The closing member 4 or 4 'is axially displaceable between a rest position and a working position on the lifting rod 6 carrying a core 9 of a lifting magnet 7 and is loaded by a return spring 8 in the closing direction. When the solenoid 7 is energized, the lifting rod 6 is moved more or less against the force of the return spring 8 in the opening direction. In the working position, which is assumed when the solenoid 7 is energized, the closing member 4 or 4 'is displaced towards the valve seat and is held in contact with a stop 10 of the lifting rod.

In Figur 1 erfolgt dies durch eine an der Hubstange 6 abgestützte Druckfeder 11.In FIG. 1, this is done by a compression spring 11 supported on the lifting rod 6.

Von dem freien Ende 12 der Hubstange 6 ist ein Hebelarm 13 eines um eine Schwenkachse 14 schwenkbaren zweiarmigen Hebels beaufschlagbar. Der andere Hebelarm 15 dieses Hebels ist mit einem Anschlag 16 versehen, gegen den das Schließglied 4 zur Anlage kommen kann.A lever arm 13 of a two-armed lever pivotable about a pivot axis 14 can be acted upon by the free end 12 of the lifting rod 6. The other lever arm 15 of this lever is provided with a stop 16 against which the closing member 4 can come to rest.

Der Hebel mit seinen Hebelarmen 13 und 15 und dem Anschlag 16 sowie das freie Ende 12 der Hubstange 6 sind derart zueinander angeordnet, daß bei bestromtem intaktem Hubmagneten 7, wenn das Schließglied 4 am Anschlag 10 in Anlage ist, das Ende 12 der Hubstange 6 nicht zur Auflage am Hebelarm 13 kommt. Das Schließglied 4 kann so bis nahe zur Auflage auf dem Ventilsitz 5 gelangen. Bei einer weiteren Bewegung der Hubstange 6 in Schließrichtung wie es durch die Rückstellfeder 8 bei stromlosem Hubmagneten 7 der Fall ist, beaufschlagt des freie Ende 12 der Hubstange 6 den Hebelarm 13 so, daß er in Schließrichtung verschwenkt. Gleichzeitig schwenkt der andere Hebelarm 15 in Öffnungsrichtung und hält über seinen Anschlag 16 das Schließglied 4 in einer Teilöffnungsstellung von dem Ventilsitz 5 ab. Da die Kraft der Rückstellfeder 8 größer ist als die Kraft der Druckfeder 11, wird diese Stellung bei stromlosem Hubmagnet 7 stabil beibehalten.The lever with its lever arms 13 and 15 and the stop 16 and the free end 12 of the lifting rod 6 are arranged with respect to one another such that when the solenoid 7 is energized and the closing member 4 is in contact with the stop 10, the end 12 of the lifting rod 6 does not comes to rest on lever arm 13. The closing member 4 can thus come close to resting on the valve seat 5. With a further movement of the lifting rod 6 in the closing direction, as is the case with the return spring 8 when the lifting magnet 7 is without current, the free end 12 of the lifting rod 6 acts on the lever arm 13 so that it pivots in the closing direction. At the same time, the other lever arm 15 pivots in the opening direction and, via its stop 16, keeps the closing member 4 from the valve seat 5 in a partially open position. Since the force of the return spring 8 is greater than the force of the compression spring 11, this position is stably maintained when the solenoid 7 is de-energized.

Um diese Stellung der Hubstange 6 zu definieren besitzt sie einen weiteren Anschlag 17 mit dem ihre Bewegung in Schließrichtung begrenzt ist.In order to define this position of the lifting rod 6, it has a further stop 17 with which its movement in the closing direction is limited.

In Figur 2 ist das Schließglied 4' zwischen dem Anschlag 10 und einem weiteren auf der Hubstange 6 engeordneten Anschlag 18 auf der Hubstange 6 verschiebbar. Eine zwischen dem Anschlag 18 und dem Schließglied 4' angeordnete Schnappfeder 19 beaufschlagt des Schließglied 4' entweder gegen den Anschlag 10 oder gegen den Anschlag 18.In Figure 2, the closing member 4 'between the stop 10 and another on the lifting rod 6 stop 18 on the lifting rod 6 is displaceable. A snap spring 19 arranged between the stop 18 and the closing member 4 'acts on the closing member 4' either against the stop 10 or against the stop 18.

Weiterhin liegt eine fest abgestützte Druckfeder 20 höherer Kraft als der Schnappfeder 19 in Schließrichtung am Schließglied 4' an. In der dargestellten einer Teilöffnung entsprechenden Ruhestellung des Schließglied 4' ist die Druckfeder 20 ohne Spannung.Furthermore, a firmly supported compression spring 20 of higher force than the snap spring 19 is in the closing direction on the closing member 4 '. In the shown rest position of the closing member 4 'corresponding to a partial opening, the compression spring 20 is without tension.

In dieser Teilöffnungsstellung, die bei stromlosem Magneten 7 eingenommen ist, ist die Hubstange 6 durch die Rücketellfeder 8 soweit in Schließrichtung verschoben, bis sie mit ihrem freien Ende 12 an einem Anschlag 17 in Anlage ist. Durch die Schnappfeder 19 wird des Schließglied 4' gegen den Anschlag 18 gehalten.In this partial opening position, which is assumed when the magnet 7 is de-energized, the lifting rod 6 is displaced in the closing direction by the return spring 8 until its free end 12 is in contact with a stop 17. The locking member 4 'is held against the stop 18 by the snap spring 19.

Wird nun der Hubmagnet 7 bestromt, so bewegt sich die Hubstange 6 in Öffnungsrichtung. Durch die Druckfeder 20, die als Anschlag wirkt, wird das Schließglied 4' in seiner Teilöffnungsstellung gehalten bis der Anschlag 18 soweit vom Schließglied 4' wegbewegt ist, daß die Schnappfeder 10 umschnappt und das Schließglied 4' nun gegen den Anschlag 10 in seiner Arbeitsstellung beaufschlagt wird.If the solenoid 7 is now energized, the lifting rod 6 moves in the opening direction. By the compression spring 20, which acts as a stop, the closing member 4 'is held in its partially open position until the stop 18 is moved so far away from the closing member 4' that the snap spring 10 snaps and the closing member 4 'now acts against the stop 10 in its working position becomes.

Eine weitere Bewegung des Schließglieds 4 in Öffnungsstellung entgegen der Kraft der Druckfeder 20 zur normalen Leerlaufregelung ist nun problemlos möglich da die Kraft des Hubmagneten 7 größer ist als die Kräfte von Druckfeder 20 und Rückstellfeder 8.A further movement of the closing member 4 in the open position against the force of the compression spring 20 for normal idle control is now possible without any problems since the force of the lifting magnet 7 is greater than the forces of the compression spring 20 and the return spring 8.

Wird der Hubmagnet 7 wieder stromlos, so bewegen Druckfeder 20 und Rückstellfeder 8 zuerst gemeinsam und anschließend nur noch die Rückstellfeder 8 allein das Schließglied 4' in Schließrichtung bis das Schließglied 4' auf dem Ventilsitz 5 aufliegt. Durch die Rückstellfeder 8 erfolgt noch eine Weiterbewegung der Hubstange 6 bis diese mit ihrem Ende 12 am Anschlag 17 zur Anlage kommt. Vorher wird aber der Umschnappunkt der Schnappfeder 19 überfahren, so daß diese das Schließglied 4' gegen den Anschlag 18 beaufschlagt.If the solenoid 7 is de-energized again, the compression spring 20 and the return spring 8 first move together and then only the return spring 8 moves the closing member 4 'in the closing direction until the closing member 4' rests on the valve seat 5. The return spring 8 causes the lifting rod 6 to move further until its end 12 comes to rest against the stop 17. Before this, however, the snap-over point of the snap spring 19 is passed over, so that it acts on the closing member 4 'against the stop 18.

In dieser Teilöffnungsstellung wie auch in der Teilöffnungsstellung in Figur 1 ist ein Luftdurchsatz durch den By-pass gewährleistet, der so gering wie möglich ist, aber trotzdem auch bei Belastungen des Motors durch Zusatzaggregate einen Leerlaufbetrieb sicherstellt.In this partial opening position as well as in the partial opening position in FIG. 1, an air throughput is ensured by the by-pass which is as low as possible, but nevertheless ensures idling operation even when the engine is loaded by additional units.

Claims (12)

1. Valve arrangement for controlling the idling speed of internal combustion engines by regulating the quantity of air at the suction side of a suction duct leading to the internal combustion engine, with an electromechanical regulating device which comprises a lifting magnet whereby a closing element (4, 4') is movable by means of a regulating element (6) in opposition to the force of a restoring spring, characterised in that the closing element (4, 4') is movable between a position of rest and a working position relatively to the regulating element (6), and in the position of rest is in a well-defined partial opening position for the valve passage.
2. Valve arrangement according to claim I, characterised in that the regulating element is a lifting rod (6) connected to the movable core (9) of the lifting magnet (7).
3. Valve arrangement according to claim 2, characterised in that the closing element (4, 4') is arranged displaceably on the lifting rod (6).
4. Valve arrangement according to one of the preceding claims, characterised in that the lifting rod (6) is acted upon in the closing direction by the restoring spring (8).
5. Valve arrangement according to one of the preceding claims, characterised in that the closing element (4,4') in the working position is held in abutment on an abutment element (10) arranged on the lifting rod (6).
6. Valve arrangement according to one of the preceding claims, characterised in that the movement stroke of the lifting rod (6) in the closing direction is limited by an abutment element (17).
7. Valve arrangement according to one of the preceding claims, characterised in that the closing element (4) is adapted to be acted upon in the closing direction by a compression spring (11), and in the partial opening position is in abutment on an abutment element (16) preventing a further closing movement.
8. Valve arrangement according to claim 7, characterised in that the abutment element (16) is one arm (15) of a two-arm lever which is rockable about a pivot (14) and whose second lever arm (13) is adapted to be acted upon by the lifting rod (6).
9. Valve arrangement according to one of claims 1 to 6, characterised in that the closing element (4') in the position of rest is held abutting against an abutment element (18) which is arranged on the lifting rod (6).
10. Valve arrangement according to claim 9, characterised in that the closing element (4') is connected to the abutment element (18) by means of a snap spring (19) and is adapted to be applied by the snap spring (19) at one side of the snap-over point of the snap spring (19) against the rest position abutment element (18) and at the other side of the snap-over point against the working position abutment element (10).
11. Valve arrangement according to claim 10, characterised in that the closing element (4') is adapted to abut against the valve seat (5) of the valve arrangement, and the lifting rod (6) is movable so far in the closing direction that the snap-over point of the snap spring (19) can be overcome, and the closing element (4') is movable against the abutment element (18) of the rest position.
12. Valve arrangement according to claim 10, characterised in that the closing element (4') is movable in the opening direction from the partial opening position in opposition to a spring force (spring 20) which is greater than the application force (spring 19) of the closing element (4') against the rest position abutment element (18).
EP83112877A 1983-08-11 1983-12-21 Valve arrangement for controlling the idling speed of internal-combustion engines Expired EP0134310B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3328949 1983-08-11
DE19833328949 DE3328949A1 (en) 1983-08-11 1983-08-11 VALVE ARRANGEMENT

Publications (3)

Publication Number Publication Date
EP0134310A2 EP0134310A2 (en) 1985-03-20
EP0134310A3 EP0134310A3 (en) 1985-06-26
EP0134310B1 true EP0134310B1 (en) 1986-09-03

Family

ID=6206271

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Application Number Title Priority Date Filing Date
EP83112877A Expired EP0134310B1 (en) 1983-08-11 1983-12-21 Valve arrangement for controlling the idling speed of internal-combustion engines

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US (2) US4662334A (en)
EP (1) EP0134310B1 (en)
DE (2) DE3328949A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873954A (en) * 1988-07-27 1989-10-17 Colt Industries Inc. Fail-safe idle bypass system
US5018495A (en) * 1988-08-17 1991-05-28 Colt Industries, Inc. Automatic idle speed circuitry
US4873955A (en) * 1988-09-19 1989-10-17 Colt Industries Inc. Idle air flow shutoff valve
DE3909396A1 (en) * 1989-03-22 1990-10-04 Bayerische Motoren Werke Ag DEVICE FOR MEASURING THE IDLE AIR OF INTERNAL COMBUSTION ENGINES
US5121724A (en) * 1989-11-16 1992-06-16 Nissan Motor Company, Ltd. Multi-cylinder internal combustion engine with individual port throttles upstream of intake valves
KR0158139B1 (en) * 1993-12-07 1998-12-15 전성원 Idle speed compensating device and method under electric load state
AU756938B1 (en) 2002-04-04 2003-01-30 Hyundai Motor Company Engine idle speed control device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1601993C3 (en) * 1967-04-06 1974-02-28 Societe Industrielle De Brevets Et D'etudes S.I.B.E., Neuilly-Sur-Seine (Frankreich) Carburetors for internal combustion engines
DE2949884C2 (en) * 1979-12-12 1985-05-30 Vdo Adolf Schindling Ag, 6000 Frankfurt Valve arrangement for regulating the idle speed of Otto engines
JPS56118529A (en) * 1980-02-22 1981-09-17 Nippon Denso Co Ltd Rotational speed controlling method for engine
US4412517A (en) * 1980-10-06 1983-11-01 Toyota Jidosha Kogyo Kabushiki Kaisha Idling speed control device of an internal combustion engine
IT1146472B (en) * 1981-07-10 1986-11-12 Weber Spa CARBURETOR FOR INTERNAL COMBUSTION ENGINES WITH ELECTROMAGNETICALLY OPERATED PARTS SUITABLE FOR PLACING THE BUTTERFLY VALVE IN TWO SMALL OPENING POSITIONS
US4438049A (en) * 1982-09-07 1984-03-20 Ford Motor Company Carburetor engine idle speed air bypass
DE3234468A1 (en) * 1982-09-17 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart METHOD AND DEVICE FOR CONTROLLING AT LEAST ONE THROTTLE CROSS-SECTION IN A CONTROL LINE

Also Published As

Publication number Publication date
US4662334A (en) 1987-05-05
EP0134310A3 (en) 1985-06-26
DE3365919D1 (en) 1986-10-09
US4708110A (en) 1987-11-24
EP0134310A2 (en) 1985-03-20
DE3328949A1 (en) 1985-02-28

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