EP0390961A1 - Positioning device for a throttle valve - Google Patents

Positioning device for a throttle valve Download PDF

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Publication number
EP0390961A1
EP0390961A1 EP89109680A EP89109680A EP0390961A1 EP 0390961 A1 EP0390961 A1 EP 0390961A1 EP 89109680 A EP89109680 A EP 89109680A EP 89109680 A EP89109680 A EP 89109680A EP 0390961 A1 EP0390961 A1 EP 0390961A1
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EP
European Patent Office
Prior art keywords
throttle valve
lever
servomotor
actuator
actuating
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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.)
Granted
Application number
EP89109680A
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German (de)
French (fr)
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EP0390961B1 (en
Inventor
Jürgen Luft
Erwin Schneider
Wolfgang Göcking
Rolf Anschicks
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Mannesmann VDO AG
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Mannesmann VDO AG
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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
    • 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

Definitions

  • the invention relates to a throttle valve actuating device which has a throttle valve actuating lever which is connected to an accelerator pedal and which actuates a throttle valve in a rotationally fixed manner on a throttle valve shaft, and a servomotor which operates exclusively in the opening direction of the throttle valve against the force of a return spring to enable idle control.
  • throttle valve actuators are provided in today's motor vehicles and are therefore known.
  • the internal combustion engine In current motor vehicles, the internal combustion engine must generate different torques even when idling.
  • the power requirement increases, for example, when the air conditioning system of a motor vehicle has to work at idle.
  • a cold internal combustion engine requires more energy to keep it running than a warm internal combustion engine.
  • idling control In order to keep the idling speed as low as possible under such different conditions, idling control is being used more and more frequently.
  • the throttle can be adjusted by means of the servomotor flap can be opened more or less in a defined work area without the driver having to press the accelerator pedal.
  • a disadvantage of the known idle control systems is their behavior in the event of a failure of the energy actuating their servomotor.
  • the idle speed control is designed so that the throttle valve is then pivoted by means of an adjusting spring into a position in which the idle speed reaches the upper value of the working range available for the idle speed control. In practice, idling speeds are so high that there would be an engagement in an automatic transmission. If the idle control is designed so that the throttle valve reaches its largely closed end position in the event of a failure of the external energy, then the internal combustion engine mostly dies in idle, which is annoying and disadvantageous for traffic safety.
  • the invention is based on the object of designing a throttle valve actuating device of the type mentioned in such a way that an average idle speed results automatically in the event of failure of the energy of the servomotor when idling.
  • a motor actuating lever mechanically connected to an actuator of the servomotor with a travel-reversing movement reversing device is provided such that when the actuator is displaced from its position resulting from the return spring, the throttle valve initially slightly in the closing direction and then pivots in the opposite direction with further displacement of the actuator.
  • the actuator in the event of a power failure of the servomotor, the actuator is pulled by an actuating spring into an emergency running position, in which the throttle valve assumes a medium open position.
  • the movement reverser means that when the servomotor is energized, when the actuator is shifted, it initially pivots the throttle valve in one direction so that it closes further and then moves in the opposite direction until the throttle valve reaches its maximum opening angle for idle control has reached.
  • the servo motor only works in one direction, thanks to the invention, the throttle valve can initially be further closed with the servo motor only by moving its actuator in only one direction and then opened again in the same direction when the actuator is moved further. This enables an optimal idle control without causing an undesirably high engine speed or the engine to die if the power of the servomotor fails.
  • the adjustment of the throttle valve for the purpose of idling control must be superimposed on the throttle valve adjustment by the accelerator pedal.
  • the movement reversing device can be formed very simply by mechanical components, in that, according to an advantageous embodiment of the invention, the movement reversing device has an intermediate lever articulated on the motor control lever with a toggle joint and on the actuator of the motor, which in the end position resulting from the actuating motor being deenergized by an actuating spring against an actuator housing-fixed stop is held between the linkage on the motor control lever and the actuator and in that the motor control lever on the opposite side of the stop has a driver against which the intermediate lever can be moved after a slight pivoting in the direction of adjustment of the servomotor.
  • the force of the actuating spring is as small as possible. This can be achieved in that the motor control lever and the intermediate lever are pretensioned in the buckling position by a leg spring which is arranged on the toggle joint and is weaker than the positioning spring. With this design, the force of the leg spring no longer increases, despite the increasing actuation stroke of the servomotor, as soon as the intermediate lever bears against the driver of the motor actuating lever.
  • Another very simple embodiment of the movement reversing device is that it has an angle lever, against the one lever arm of which the motor control lever forms a tilt axis and against the other lever arm of which the actuator of the servomotor is held by an actuating spring and that at the end of the actuator a after a short Stroke in the direction resulting from the energization of the servomotor against the motor actuating lever provided see is.
  • Another, particularly simple design of the throttle valve actuating device results if the movement reversing device is formed by a lifting curve on the engine control lever against which the throttle valve actuating lever bears.
  • the stroke curve enables the dependency between the stroke of the servomotor and the throttle valve angle to be designed as desired.
  • Such an actuating device is designed in a particularly simple manner with a stroke curve if the motor control lever is designed as a two-armed lever which can be pivoted about an axis, on one lever arm of which the actuator of the servomotor is articulated and the other lever arm of which has the stroke curve.
  • the optimal throttle valve opening angle is plotted over the travel path of a servomotor. It can be seen that when the servomotor is actuated, the throttle valve opening angle initially decreases from approximately 5 degrees to almost 0 degrees and then increases to approximately 25 degrees. The area from close to 0 degrees to 25 degrees is the working range in which the idle control works. If the energy of the servomotor fails, a return spring can move the actuator of the servomotor into an emergency running position in which the throttle valve is open by approximately 5 degrees.
  • the optimal characteristic curve shown in FIG. 1 can be achieved with the two throttle valve actuators, which are shown in the following figures.
  • FIG. 2 shows a throttle valve connector 1, in which a throttle valve 3 is arranged non-rotatably on a rotatably mounted throttle valve shaft 2. Furthermore, a two-armed driver lever 4 is arranged non-rotatably on the throttle valve shaft 2, which is biased clockwise by a return spring 5 and thus in the closing direction of the throttle valve 3.
  • a linkage 8 engages, which can be displaced by the accelerator pedal 9 between an idle position LL and a full load position VL. If the accelerator pedal 9 moves from the idling position LL shown in the direction of the full-load position VL, the throttle valve actuating lever 6 pivots counterclockwise. His driver 7 pivots the driver lever 4 in the same direction of rotation, so that the throttle valve 3 opens increasingly.
  • an engine control lever 10 leads into the throttle valve connector 1.
  • This engine control lever 10 is also rotatably mounted on the throttle valve shaft 2 and has a driver 11 which bears from above against the left lever arm of the driver lever 4.
  • a pneumatic servomotor 12 which has an actuator 13, which can be moved to the left as seen in the drawing by applying negative pressure to the servomotor 12 against the force of an actuating spring 14.
  • a path-dependent reversing movement reversing device 15 which connects the end of the actuator 13 to the motor control lever 10 and by which means that when the actuator 13 is moved to the left, the motor control lever 10 pivots first clockwise and then counterclockwise.
  • the movement reversing device has an intermediate lever 16 articulated at the end of the actuator, which is connected to the motor actuating lever 10 by means of a toggle joint 17.
  • the intermediate lever 16 bears against an upwardly facing driver 18 of the motor control lever 10.
  • a leg spring 19 arranged on the toggle joint 17 biases the intermediate lever 16 and the motor control lever 10 in such a way that these two levers want to pivot out of their mutually extended position.
  • the intermediate lever 16 bears on the side facing away from the driver 18 between the toggle joint 17 and the actuator 13 against a stop 20 fixed to the housing.
  • FIG. 3 shows the position of the above-described components which results in the end position when the servomotor 12 is energized, that is to say in the position in which the throttle valve 3 is maximally open in the idle control.
  • Actuator 13 is maximally moved into servomotor 12, so that intermediate lever 16 correspondingly counteracts the force the actuating spring 14 has been pivoted to the left as far as possible. Since the intermediate lever 16 bears against the driver 18, the motor control lever 19 was simultaneously pivoted counterclockwise with it.
  • the driver lever 10 presses with its driver 11 on the driver lever 4 and has thereby pivoted this counterclockwise against the force of the return spring 5, so that the throttle valve 3 has been opened accordingly.
  • FIG. 4 shows an emergency running position which results when the power of the servomotor 12 fails.
  • the actuating spring 14 has seen the actuator 13 in FIG. 4 pulled so far to the right that the intermediate lever 16 has been pivoted slightly clockwise around the stop 20, resulting in a buckling of the toggle joint 17 and thus a pivoting of the motor actuating lever 10 clockwise.
  • the motor control lever 10 with the driver 11 could pivot the driver lever 4 slightly counterclockwise, so that the throttle valve 3 is in a slightly more open position compared to FIG.
  • the movement reversing device 15 has an angle lever 21 which is pivotably mounted on the throttle valve connector 1 and, with the end of a lever arm 22, bears against the engine control lever 10 led out of the throttle valve connector 1 in this embodiment.
  • the actuator 13 of the servomotor 12 has a driver 23 at its end and is held by the actuating spring 14 against a lever arm 25 of the angle lever 21 when the servomotor 12 is not pressurized, so that it bears against a stop 24 fixed to the housing.
  • the actuator 13 begins to shift to the left. Characterized the angle lever 21 pivots counterclockwise because the motor control lever 10 presses against the lever arm 22 under the action of the return spring 5. The motor control lever 10 thus follows the receding lever arm 22 to the right. This causes the throttle valve 3 to move in the closing direction. Has the actuator 13 moved so far to the left that the driver 23 comes against the engine control lever 10, then he takes the engine control lever 10 to the left. As a result, the driving lever 4 is pivoted counterclockwise, which leads to the throttle valve 3 being opened.
  • the motor control lever 10 is designed as a two-armed lever which can be pivoted about an axis 26 designed as an adjustment eccentric.
  • the actuator 13 of the servomotor 12 is articulated on the lower lever arm of the motor actuating lever 10, as seen in FIG.
  • the other lever arm has at its free end a stroke curve 27 which is shaped such that the motor control lever 10 has the overall shape of a boot, the running surface of which is formed by the stroke curve 27.
  • the throttle valve actuating lever 6 bears against this lifting curve 27, which lever is firmly connected to the throttle valve shaft 2 that actuates the throttle valve 3 in the throttle valve neck 1.
  • the servomotor 12 must be energized.
  • the actuator 13 is increasingly drawn into the servomotor 12.
  • the position resulting at maximum current supply, in which the throttle valve 3 is opened to the maximum, is shown in FIG. 7.
  • the motor control lever 10 has pivoted so far clockwise that it has pivoted the throttle valve control lever 6 counterclockwise with its stroke curve 27 and now bears against the throttle valve control lever 6 with a left region of the stroke curve 27.

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

Abstract

A positioning device for a throttle valve has an engine control lever (10) adjusting a throttle valve (3) for the idling adjustment, which lever is connected via a displacement-dependently controlled movement-reversing device (15) to an actuating mechanism (13) of a servomotor (12). This design means that when power is applied to the servomotor (12) the control lever (10) at first swivels slightly in one direction and then in the other direction until the full load position of the throttle valve (3) is reached. <IMAGE>

Description

Die Erfindung betrifft eine Drosselklappen-Stelleinrich­tung, welche einen mit einem Fahrpedal verbundenen, eine auf einer Drosselklappenwelle drehfest angeordneten Drosselklappe betätigenden Drosselklappenstellhebel und einen ausschließlich in Öffnungsrichtung der Drossel­klappe gegen die Kraft einer Rückstellfeder arbeitenden Stellmotor zur Ermöglichung einer Leerlaufregelung auf­weist. Solche Drosselklappen-Stelleinrichtungen sind in heutigen Kraftfahrzeugen vorgesehen und deshalb bekannt.The invention relates to a throttle valve actuating device which has a throttle valve actuating lever which is connected to an accelerator pedal and which actuates a throttle valve in a rotationally fixed manner on a throttle valve shaft, and a servomotor which operates exclusively in the opening direction of the throttle valve against the force of a return spring to enable idle control. Such throttle valve actuators are provided in today's motor vehicles and are therefore known.

In derzeitigen Kraftfahrzeugen muß die Brennkraftma­schine auch im Leerlauf unterschiedliche Drehmomente erzeugen. Der Kraftbedarf steigt beispielsweise an, wenn im Leerlauf die Klimaanlage eines Kraftfahrzeugs arbei­ten muß. Bei kalter Brennkraftmaschine wird mehr Energie benötigt, um diese am Laufen zu halten, als bei warmer Brennkraftmaschine. Um bei solchen unterschiedlichen Be­dingungen die Leerlaufdrehzahl möglichst niedrig halten zu können, wird immer häufiger eine Leerlaufregelung ein­gesetzt. Dabei kann mittels des Stellmotors die Drossel­ klappe in einem festgelegten Arbeitsbereich mehr oder weniger geöffnet werden, ohne daß der Fahrer hierzu das Fahrpedal betätigen muß.In current motor vehicles, the internal combustion engine must generate different torques even when idling. The power requirement increases, for example, when the air conditioning system of a motor vehicle has to work at idle. A cold internal combustion engine requires more energy to keep it running than a warm internal combustion engine. In order to keep the idling speed as low as possible under such different conditions, idling control is being used more and more frequently. The throttle can be adjusted by means of the servomotor flap can be opened more or less in a defined work area without the driver having to press the accelerator pedal.

Nachteilig bei den bekannten Leerlaufregelungen ist ihr Verhalten bei Ausfall der ihren Stellmotor betätigenden Energie. Üblicherweise ist die Leerlaufregelung so aus­gelegt, daß die Drosselklappe dann mittels einer Stell­feder in eine solche Stellung geschwenkt wird, in der die Leerlaufdrehzahl den oberen Wert des für die Leer­laufregelung zur Verfügung stehenden Arbeitsbereiches erreicht. In der Praxis ergeben sich dann so hohe Leer­laufdrehzahlen, daß es bei einem automatischen Getriebe zu einem Einkuppeln käme. Gestaltet man die Leerlauf­regelung so, daß die Drosselklappe bei einem Ausfall der Fremdenergie ihre weitgehend geschlossene Endstellung erreicht, dann stirbt die Brennkraftmaschine im Leerlauf meist ab, was lästig und für die Verkehrssicherheit nach­teilig ist.A disadvantage of the known idle control systems is their behavior in the event of a failure of the energy actuating their servomotor. Normally, the idle speed control is designed so that the throttle valve is then pivoted by means of an adjusting spring into a position in which the idle speed reaches the upper value of the working range available for the idle speed control. In practice, idling speeds are so high that there would be an engagement in an automatic transmission. If the idle control is designed so that the throttle valve reaches its largely closed end position in the event of a failure of the external energy, then the internal combustion engine mostly dies in idle, which is annoying and disadvantageous for traffic safety.

Der Erfindung liegt die Aufgabe zugrunde, eine Drossel­klappen-Stelleinrichtung der eingangs genannten Art so auszubilden, daß sich bei Ausfall der Energie des Stell­motors im Leerlauf selbsttätig eine mittlere Leerlauf­drehzahl ergibt.The invention is based on the object of designing a throttle valve actuating device of the type mentioned in such a way that an average idle speed results automatically in the event of failure of the energy of the servomotor when idling.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zur Betätigung der Drosselklappe durch den Stellmotor ein mit einer wegabhängig umsteuernden Bewegungsumkehr­einrichtung mechanisch derart mit einem Stellglied des Stellmotors verbundener Motorstellhebel vorgesehen ist, daß bei einer Verschiebung des Stellgliedes aus seiner durch die Rückstellfeder sich ergebenden Stellung die Drosselklappe zunächst geringfügig in Schließrichtung und dann bei weiterer Verschiebung des Stellgliedes in umgekehrter Richtung schwenkt.This object is achieved in that, for actuating the throttle valve by the servomotor, a motor actuating lever mechanically connected to an actuator of the servomotor with a travel-reversing movement reversing device is provided such that when the actuator is displaced from its position resulting from the return spring, the throttle valve initially slightly in the closing direction and then pivots in the opposite direction with further displacement of the actuator.

Durch diese Gestaltung kann man erreichen, daß bei einem Ausfall der Energie des Stellmotors das Stellglied von einer Stellfeder in eine Notlaufstellung gezogen wird, in der die Drosselklappe eine mittlere Leerlaufoffen­stellung einnimmt. Durch die Bewegungsumkehreinrichtung ergibt es sich bei einer Energiebeaufschlagung des Stell­motors, daß bei einer Verschiebung des Stellgliedes der die Drosselklappe zunächst in eine Richtung schwenkt, so sie sich weiter schließt und sich dann in umgekehrter Richtung bewegt, bis daß die Drosselklappe ihren für die Leerlaufregelung maximalen Öffnungwinkel erreicht hat. Obwohl der Stellmotor nur in einer Richtung arbeitet, läßt sich dank der Erfindung mit dem Stellmotor allein durch Verschieben seines Stellgliedes in nur eine Rich­tung die Drosselklappe zunächst weiter schließen und dann bei weiterer Verschiebung des Stellgliedes in gleicher Richtung wieder weiter öffnen. Dadurch ist eine optimale Leerlaufregelung möglich, ohne daß es bei Aus­fall der Energie des Stellmotors zu einer unerwünscht hohen Motordrehzahl oder zu einem Absterben des Motors kommt.With this design, it can be achieved that in the event of a power failure of the servomotor, the actuator is pulled by an actuating spring into an emergency running position, in which the throttle valve assumes a medium open position. The movement reverser means that when the servomotor is energized, when the actuator is shifted, it initially pivots the throttle valve in one direction so that it closes further and then moves in the opposite direction until the throttle valve reaches its maximum opening angle for idle control has reached. Although the servo motor only works in one direction, thanks to the invention, the throttle valve can initially be further closed with the servo motor only by moving its actuator in only one direction and then opened again in the same direction when the actuator is moved further. This enables an optimal idle control without causing an undesirably high engine speed or the engine to die if the power of the servomotor fails.

Die Verstellung der Drosselklappe zum Zwecke der Leer­laufregelung muß der Drosselklappenverstellung durch das Fahrpedal überlagert werden. Das kann auf einfache Weise dadurch geschehen, daß ein drehfest mit der Drosselklap­penwelle verbundener, von der Rückstellfeder in Schließ­richtung der Drosselklappe vorgespannter, zweiarmiger Mitnehmerhebel vorgesehen ist, gegen den von einer Seite her der Drosselklappenstellhebel mit einem Mitnehmer an einem Hebelarm des Mitnehmerhebels anliegt und gegen den von der anderen Seite her der Motorstellhebel mit einem Mitnehmer an dem anderen Hebelarm anliegt.The adjustment of the throttle valve for the purpose of idling control must be superimposed on the throttle valve adjustment by the accelerator pedal. This can be done in a simple manner in that a two-armed driver lever, which is non-rotatably connected to the throttle valve shaft and is biased by the return spring in the closing direction of the throttle valve, is provided against which the throttle valve actuating lever rests with a driver on a lever arm of the driver lever and against the from the other side the motor control lever rests with a driver on the other lever arm.

Die Bewegungsumkehreinrichtung kann sehr einfach durch mechanische Bauteile ausgebildet sein, indem gemäß einer vorteihaften Ausgestaltung der Erfindung die Bewegungsum­kehreinrichtung einen am Motorstellhebel mit einem Knie­hebelgelenk und am Stellglied des Motors angelenkten Zwischenhebel aufweist, welcher in der sich ohne Energie­beaufschlagung des Stellmotors ergebenden Endstellung durch eine Stellfeder gegen einen gehäusefesten Anschlag zwischen der Anlenkung am Motorstellhebel und dem Stell­glied gehalten ist und indem der Motorstellhebel auf der dem Anschlag gegenüberliegenden Seite einen Mitnehmer aufweist, gegen den der Zwischenhebel nach einer gering­fügigen Verschwenkung in Stellrichtung des Stellmotors bewegbar ist.The movement reversing device can be formed very simply by mechanical components, in that, according to an advantageous embodiment of the invention, the movement reversing device has an intermediate lever articulated on the motor control lever with a toggle joint and on the actuator of the motor, which in the end position resulting from the actuating motor being deenergized by an actuating spring against an actuator housing-fixed stop is held between the linkage on the motor control lever and the actuator and in that the motor control lever on the opposite side of the stop has a driver against which the intermediate lever can be moved after a slight pivoting in the direction of adjustment of the servomotor.

Da der Stellmotor zum Verstellen der Drosselklappe zwecks Leerlaufregelung gegen die Rückstellfeder und die Stellfeder arbeiten muß, ist es wünschenswert, daß die Kraft der Stellfeder möglichst gering ist. Das kann er­reicht werden, indem der Motorstellhebel und der Zwi­schenhebel durch eine am Kniehebelgelenk angeordnete, schwächer als die Stellfeder ausgebildete Schenkelfeder in Einknickstellung vorgespannt ist. Durch diese Gestal­tung nimmt die Kraft der Schenkelfeder trotz zunehmendem Betätigungshub des Stellmotors nicht mehr zu, sobald der Zwischenhebel gegen den Mitnehmer des Motorstellhebels anliegt.Since the servomotor has to work against the return spring and the actuating spring to adjust the throttle valve in order to regulate the idling speed, it is desirable that the force of the actuating spring is as small as possible. This can be achieved in that the motor control lever and the intermediate lever are pretensioned in the buckling position by a leg spring which is arranged on the toggle joint and is weaker than the positioning spring. With this design, the force of the leg spring no longer increases, despite the increasing actuation stroke of the servomotor, as soon as the intermediate lever bears against the driver of the motor actuating lever.

Eine ebenfalls sehr einfache Ausführungsform der Bewe­gungsumkehreinrichtung besteht darin, daß sie einen Winkelhebel aufweist, gegen dessen einen Hebelarm der Motorstellhebel unter Bildung einer Kippachse und gegen dessen anderen Hebelarm das Stellglied des Stellmotors durch eine Stellfeder gehalten ist und daß am Ende des Stellgliedes ein nach einem kurzen Hub in die sich durch Energiebeaufschlagung des Stellmotors ergebende Richtung gegen den Motorstellhebel gelangender Mitnehmer vorge­ sehen ist.Another very simple embodiment of the movement reversing device is that it has an angle lever, against the one lever arm of which the motor control lever forms a tilt axis and against the other lever arm of which the actuator of the servomotor is held by an actuating spring and that at the end of the actuator a after a short Stroke in the direction resulting from the energization of the servomotor against the motor actuating lever provided see is.

Eine andere, besonders einfache Ausbildung der Drossel­klappen-Stelleinrichtung ergibt sich, wenn die Bewegungs­umkehreinrichtung durch eine Hubkurve am Motorstellhebel gebildet ist, gegen die der Drosselklappenstellhebel an­liegt. Die Hubkurve ermöglicht es, die Abhängigkeit zwi­schen dem Hub des Stellmotors und dem Drosselklappenwin­kel beliebig zu gestalten.Another, particularly simple design of the throttle valve actuating device results if the movement reversing device is formed by a lifting curve on the engine control lever against which the throttle valve actuating lever bears. The stroke curve enables the dependency between the stroke of the servomotor and the throttle valve angle to be designed as desired.

Ganz besonders einfach ist eine solche Stelleinrichtung mit einer Hubkurve gestaltet, wenn der Motorstellhebel als um eine Achse schwenkbarer, zweiarmiger Hebel ausge­bildet ist, an dessen einem Hebelarm das Stellglied des Stellmotors angelenkt ist und dessen anderer Hebelarm die Hubkurve aufweist.Such an actuating device is designed in a particularly simple manner with a stroke curve if the motor control lever is designed as a two-armed lever which can be pivoted about an axis, on one lever arm of which the actuator of the servomotor is articulated and the other lever arm of which has the stroke curve.

Eine genaue Justage der Drosselklappen-Stelleinrichtung ist mit einem sehr einfachen Bauteil zu erreichen, wenn die Achse des Motorstellhebels als eine Verstellung des Motorstellhebels ermöglichender Einstellexzenter ausge­bildet ist.Accurate adjustment of the throttle valve actuating device can be achieved with a very simple component if the axis of the engine control lever is designed as an adjustment eccentric that enables adjustment of the engine control lever.

Die Erfindung läßt zahlreiche Ausführungsmöglichkeiten zu. Zur weiteren Erläuterung ihres Grundprinzips sind drei davon in der Zeichnung dargestellt und werden nach­folgend beschrieben. In ihr zeigen die

  • Fig. 1 die angestrebte Abhängigkeit des Drossel­klappenwinkels vom Stellweg des Stellmotors,
  • Fig. 2 eine Prinzipskizze der erfindungsgemäßen Drosselklappen-Stelleinrichtung in derjenigen Stellung, die sich bei minimaler Leerlauf­öffnung der Drosselklappe ergibt,
  • Fig. 3 eine Prinzipskizze der erfindungsgemäßen Drosselklappen-Stelleinrichtung in derjenigen Stellung, die sich bei maximaler Leerlauföff­nung der Drosselklappe ergibt,
  • Fig. 4 eine Prinzipskizze der erfindungsgemäßen Drosselklappen-Stelleinrichtung in derjenigen Stellung, die sich bei nicht beaufschlagtem Stellmotor ergibt,
  • Fig. 5 eine Prinzipskizze einer zweiten Ausführungs­form einer Drosselklappen-Stelleinrichtung in derjenigen Stellung, die sich bei nicht be­aufschlagtem Stellmotor ergibt,
  • Fig. 6 eine Prinzipskizze einer dritten Ausführungs­form der erfindungsgemäßen Drosselklappen-­Stelleinrichtung in derjenigen Stellung, die sich bei minimaler Leerlauf-Öffnung der Drosselklappe ergibt,
  • Fig. 7 eine Prinzipskizze der Drosseklappen-Stell­einrichtung nach Figur 6 in derjenigen Stel­lung, die sich bei maximaler Leerlauf-Öffnung der Drosselklappe ergibt,
  • Fig. 8 eine Prinzipskizze der Drosselklappen-Stell­einrichtung nach den Figuren 6 und 7 in der­jenigen Stellung, die sich bei nicht beauf­schlagtem Stellmotor ergibt.
The invention allows numerous design options. To further explain its basic principle, three of them are shown in the drawing and are described below. They show in her
  • 1 shows the desired dependency of the throttle valve angle on the travel of the servomotor,
  • 2 is a schematic diagram of the throttle valve actuating device according to the invention in the position which results when the throttle valve is at a minimum idle opening,
  • 3 is a schematic diagram of the throttle valve actuating device according to the invention in the position that results when the throttle valve is at maximum idle opening,
  • 4 shows a schematic diagram of the throttle valve actuating device according to the invention in the position which results when the servomotor is not acted on,
  • 5 shows a schematic diagram of a second embodiment of a throttle valve actuating device in the position which results when the servomotor is not acted on,
  • 6 shows a schematic diagram of a third embodiment of the throttle valve actuating device according to the invention in the position which results when the throttle valve opens at a minimal idle speed,
  • 7 shows a schematic diagram of the throttle valve actuating device according to FIG. 6 in the position which results when the throttle valve is at maximum idle opening,
  • 8 is a schematic diagram of the throttle valve actuating device according to FIGS. 6 and 7 in the position which results when the servomotor is not acted on.

In dem Diagramm gemäß Figur 1 ist der optimale Drossel­klappenöffnungswinkel über dem Stellweg eines Stell­motors aufgetragen. Zu erkennen ist, daß der Drossel­klappenöffnungswinkel bei einer Betätigung des Stellmo­tors von etwa 5 Grad zunächst auf nahezu 0 Grad abnimmt und dann bis etwa 25 Grad ansteigt. Der Bereich von nahe­ zu 0 Grad bis 25 Grad ist der Arbeitsbereich, in dem die Leerlaufregelung arbeitet. Fällt die Energie des Stell­motors aus, dann kann eine Rückstellfeder das Stellglied des Stellmotors in eine Notlaufstellung bewegen, in der die Drosselklappe um etwa 5 Grad geöffnet ist. Der in Figur 1 gezeigte, optimale Kennlinienverlauf läßt sich mit den beiden Drosselklappen-Stelleinrichtungen errei­chen, welche in den nachfolgenden Figuren gezeigt sind.In the diagram according to FIG. 1, the optimal throttle valve opening angle is plotted over the travel path of a servomotor. It can be seen that when the servomotor is actuated, the throttle valve opening angle initially decreases from approximately 5 degrees to almost 0 degrees and then increases to approximately 25 degrees. The area from close to 0 degrees to 25 degrees is the working range in which the idle control works. If the energy of the servomotor fails, a return spring can move the actuator of the servomotor into an emergency running position in which the throttle valve is open by approximately 5 degrees. The optimal characteristic curve shown in FIG. 1 can be achieved with the two throttle valve actuators, which are shown in the following figures.

In Figur 2 ist ein Drosselklappenstutzen 1 gezeigt, in dem unverdrehbar auf einer drehbar gelagerten Drossel­klappenwelle 2 eine Drosselklappe 3 angeordnet ist. Wei­terhin ist unverdrehbar auf der Drosselklappenwelle 2 ein zweiarmiger Mitnehmerhebel 4 angeordnet, welcher von einer Rückstellfeder 5 im Uhrzeigersinn und damit in Schließrichtung der Drosselklappe 3 vorgespannt ist.FIG. 2 shows a throttle valve connector 1, in which a throttle valve 3 is arranged non-rotatably on a rotatably mounted throttle valve shaft 2. Furthermore, a two-armed driver lever 4 is arranged non-rotatably on the throttle valve shaft 2, which is biased clockwise by a return spring 5 and thus in the closing direction of the throttle valve 3.

Unterhalb des Mitnehmerhebels 4 ist ein verdrehbar auf der Drosselklappenwelle 2 gelagerter Drosselklappenstell­hebel 6 angeordnet, welcher mit einem Mitnehmer 7 von unten her gegen den rechten Hebelarm des Mitnehmerhebels 4 anliegt. Am unteren Ende des Drosselklappenstellhebels 6 greift ein Gestänge 8 an, welches vom Fahrpedal 9 zwi­schen einer Leerlaufstellung LL und einer Vollaststel­lung VL verschiebbar ist. Bewegt sich das Fahrpedal 9 aus der dargestellten Leerlaufstellung LL in Richtung der Vollaststellung VL, dann schwenkt der Drosselklappen­stellhebel 6 entgegen dem Uhrzeigersinn. Sein Mitnehmer 7 verschwenkt dabei den Mitnehmerhebel 4 im gleichen Drehsinn, so daß die Drosselklappe 3 zunehmend öffnet.A throttle valve actuating lever 6, which is rotatably mounted on the throttle valve shaft 2 and which bears against the right lever arm of the driving lever 4 from below with a driver 7, is arranged below the driving lever 4. At the lower end of the throttle valve control lever 6, a linkage 8 engages, which can be displaced by the accelerator pedal 9 between an idle position LL and a full load position VL. If the accelerator pedal 9 moves from the idling position LL shown in the direction of the full-load position VL, the throttle valve actuating lever 6 pivots counterclockwise. His driver 7 pivots the driver lever 4 in the same direction of rotation, so that the throttle valve 3 opens increasingly.

Von oben her führt ein Motorstellhebel 10 in den Drossel­klappenstutzen 1 hinein. Dieser Motorstellhebel 10 ist ebenfalls drehbar auf der Drosselklappenwelle 2 gelagert und hat einen Mitnehmer 11, der von oben her gegen den linken Hebelarm des Mitnehmerhebels 4 anliegt. Zur moto­rischen Verstellung der Drosselklappe 3 zwecks Leerlauf­ regelung dient ein pneumatischer Stellmotor 12, welcher ein Stellglied 13 hat, das durch Unterdruckbeaufschla­gung des Stellmotors 12 gegen die Kraft einer Stellfeder 14 in der Zeichnung gesehen nach links verfahrbar ist. Wichtig für die Erfindung ist eine wegabhängig umsteuern­de Bewegungsumkehreinrichtung 15, welche das Ende des Stellgliedes 13 mit dem Motorstellhebel 10 verbindet und durch die erreicht wird, daß bei einem Verfahren des Stellgliedes 13 nach links der Motorstellhebel 10 zu­nächst im Uhrzeigersinn und dann entgegen dem Uhrzeiger­sinn schwenkt.From above, an engine control lever 10 leads into the throttle valve connector 1. This engine control lever 10 is also rotatably mounted on the throttle valve shaft 2 and has a driver 11 which bears from above against the left lever arm of the driver lever 4. For motorized adjustment of the throttle valve 3 for idling regulation serves a pneumatic servomotor 12, which has an actuator 13, which can be moved to the left as seen in the drawing by applying negative pressure to the servomotor 12 against the force of an actuating spring 14. Important for the invention is a path-dependent reversing movement reversing device 15, which connects the end of the actuator 13 to the motor control lever 10 and by which means that when the actuator 13 is moved to the left, the motor control lever 10 pivots first clockwise and then counterclockwise.

Bei der in Figur 2 gezeigten Ausführungsform hat die Be­wegungsumkehreinrichtung einen am Ende des Stellgliedes angelenkten Zwischenhebel 16, welcher mittels eines Knie­hebelgelenkes 17 mit dem Motorstellhebel 10 verbunden ist. In der in Figur 2 gezeigten, gestreckten Stellung liegt der Zwischenhebel 16 gegen einen nach oben weisen­den Mitnehmer 18 des Motorstellhebels 10 an. Eine auf dem Kniehebelgelenk 17 angeordnete Schenkelfeder 19 spannt den Zwischenhebel 16 und den Motorstellhebel 10 derart vor, daß diese beiden Hebel aus ihrer zueinander gestreckten Stellung herausschwenken wollen.In the embodiment shown in FIG. 2, the movement reversing device has an intermediate lever 16 articulated at the end of the actuator, which is connected to the motor actuating lever 10 by means of a toggle joint 17. In the extended position shown in FIG. 2, the intermediate lever 16 bears against an upwardly facing driver 18 of the motor control lever 10. A leg spring 19 arranged on the toggle joint 17 biases the intermediate lever 16 and the motor control lever 10 in such a way that these two levers want to pivot out of their mutually extended position.

Für die Funktion der Bewegungsumkehreinrichtung ist des­weiteren wichtig, daß der Zwischenhebel 16 auf der dem Mitnehmer 18 abgewandten Seite zwischen dem Kniehebelge­lenk 17 und dem Stellglied 13 gegen einen gehäusefesten Anschlag 20 anliegt.For the function of the movement reversing device it is further important that the intermediate lever 16 bears on the side facing away from the driver 18 between the toggle joint 17 and the actuator 13 against a stop 20 fixed to the housing.

Die Figur 3 zeigt diejenige Position der vorbeschriebe­nen Bauteile, die sich bei energiebeaufschlagtem Stell­motor 12 in der Endstellung ergibt, also in derjenigen Stellung, in der bei der Leerlaufregelung die Drossel­klappe 3 maximal geöffnet ist. Das Stellglied 13 ist hierbei maximal in den Stellmotor 12 hineingefahren, so daß der Zwischenhebel 16 entsprechend gegen die Kraft der Stellfeder 14 maximal nach links verschwenkt wurde. Da der Zwischenhebel 16 gegen den Mitnehmer 18 anliegt, wurde mit ihm gleichzeitig der Motorstellhebel 19 ent­gegen dem Uhrzeigersinn verschwenkt. Der Mitnehmerhebel 10 drückt mit seinem Mitnehmer 11 auf den Mitnehmerhebel 4 und hat dadurch auch diesen entgegen dem Uhrzeigersinn gegen die Kraft der Rückstellfeder 5 verschwenkt, so daß die Drosselklappe 3 entsprechend geöffnet wurde.FIG. 3 shows the position of the above-described components which results in the end position when the servomotor 12 is energized, that is to say in the position in which the throttle valve 3 is maximally open in the idle control. Actuator 13 is maximally moved into servomotor 12, so that intermediate lever 16 correspondingly counteracts the force the actuating spring 14 has been pivoted to the left as far as possible. Since the intermediate lever 16 bears against the driver 18, the motor control lever 19 was simultaneously pivoted counterclockwise with it. The driver lever 10 presses with its driver 11 on the driver lever 4 and has thereby pivoted this counterclockwise against the force of the return spring 5, so that the throttle valve 3 has been opened accordingly.

Bei der Leerlaufregelung bewegen sich die gezeigten Bau­teile zwischen den in den Figuren 2 und 3 gezeigten End­stellungen. Die Figur 4 zeigt eine Notlaufstellung, die sich bei Ausfall der Energie des Stellmotors 12 ergibt. In dieser Stellung hat die Stellfeder 14 das Stellglied 13 in Figur 4 gesehen so weit nach rechts gezogen, daß der Zwischenhebel 16 im Uhrzeigersinn um den Anschlag 20 geringfügig verschwenkt wurde, was zu einem Einknicken des Kniehebelgelenkes 17 und damit zu einem Verschwenken des Motorstellhebels 10 entgegen dem Uhrzeigersinn führte. Hierdurch konnte der Motorstellhebel 10 mit dem Mitnehmer 11 den Mitnehmerhebel 4 geringfügig entgegen dem Uhrzeigersinn verschwenken, so daß die Drosselklappe 3 sich in einer gegenüber Figur 2 etwas mehr geöffneten Stellung befindet.In the idle control, the components shown move between the end positions shown in FIGS. 2 and 3. FIG. 4 shows an emergency running position which results when the power of the servomotor 12 fails. In this position, the actuating spring 14 has seen the actuator 13 in FIG. 4 pulled so far to the right that the intermediate lever 16 has been pivoted slightly clockwise around the stop 20, resulting in a buckling of the toggle joint 17 and thus a pivoting of the motor actuating lever 10 clockwise. As a result, the motor control lever 10 with the driver 11 could pivot the driver lever 4 slightly counterclockwise, so that the throttle valve 3 is in a slightly more open position compared to FIG.

Bei der Ausführungsform nach Figur 5 weist die Bewegungs­umkehreinrichtung 15 einen Winkelhebel 21 auf, der schwenkbar am Drosselklappenstutzen 1 gelagert ist und mit dem Ende eines Hebelarmes 22 gegen den bei dieser Ausführungsform aus dem Drosselklappenstutzen 1 heraus­geführten Motorstellhebel 10 anliegt. Das Stellglied 13 des Stellmotors 12 hat an seinem Ende einen Mitnehmer 23 und wird bei nicht druckbeaufschlagtem Stellmotor 12 von der Stellfeder 14 gegen einen Hebelarm 25 des Winkelhe­bels 21 gehalten, so daß dieser gegen einen gehäuse­festen Anschlag 24 anliegt.In the embodiment according to FIG. 5, the movement reversing device 15 has an angle lever 21 which is pivotably mounted on the throttle valve connector 1 and, with the end of a lever arm 22, bears against the engine control lever 10 led out of the throttle valve connector 1 in this embodiment. The actuator 13 of the servomotor 12 has a driver 23 at its end and is held by the actuating spring 14 against a lever arm 25 of the angle lever 21 when the servomotor 12 is not pressurized, so that it bears against a stop 24 fixed to the housing.

Wird der Stellmotor 12 mit Unterdruck beaufschlagt, so beginnt sich das Stellglied 13 nach links zu verschie­ben. Dadurch verschwenkt sich der Winkelhebel 21 ent­gegen dem Uhrzeigersinn, weil der Motorstellhebel 10 unter der Wirkung der Rückstellfeder 5 gegen den Hebel­arm 22 drückt. Der Motorstellhebel 10 folgt somit dem zurückweichenden Hebelarm 22 nach rechts. Es kommt da­durch zu einer Bewegung der Drosselklappe 3 in Schließ­richtung. Hat sich das Stellglied 13 so weit nach links verschoben, daß der Mitnehmer 23 gegen den Motorstell­hebel 10 gelangt, so nimmt er anschließend den Motor­stellhebel 10 mit nach links. Dadurch wird der Mitnehmer­hebel 4 entgegen dem Uhrzeigersinn verschwenkt, was zu einem Öffnen der Drosselklappe 3 führt.If the servomotor 12 is subjected to negative pressure, the actuator 13 begins to shift to the left. Characterized the angle lever 21 pivots counterclockwise because the motor control lever 10 presses against the lever arm 22 under the action of the return spring 5. The motor control lever 10 thus follows the receding lever arm 22 to the right. This causes the throttle valve 3 to move in the closing direction. Has the actuator 13 moved so far to the left that the driver 23 comes against the engine control lever 10, then he takes the engine control lever 10 to the left. As a result, the driving lever 4 is pivoted counterclockwise, which leads to the throttle valve 3 being opened.

Bei der in Figur 6 gezeigten Ausführungsform der Erfin­dung ist der Motorstellhebel 10 als zweiarmiger Hebel ausgebildet, welcher um eine als Einstellexzenter aus­gebildete Achse 26 schwenkbar ist. Am in Figur 6 gesehen unteren Hebelarm des Motorstellhebels 10 ist das Stell­glied 13 des Stellmotors 12 angelenkt. Der andere Hebel­arm weist an seinem freien Ende eine Hubkurve 27 auf, die so geformt ist, daß der Motorstellhebel 10 insgesamt die Form eines Stiefels hat, dessen Lauffläche von der Hubkurve 27 gebildet ist. Gegen diese Hubkurve 27 liegt der Drosselklappenstellhebel 6 an, welcher fest mit der die Drosselklappe 3 im Drosselklappenstutzen 1 betätigen­den Drosselklappenwelle 2 verbunden ist. Eine Stellfeder 28, welche auf dem Stellglied 13 angeordnet ist, spannt den Motorstellhebel 10 in einem dem Uhrzeigersinn ent­gegengerichteten Drehsinn vor. In der in Figur 6 gezeig­ten Stellung der Bauteile ist die Drosselklappe 3 ge­schlossen. Der Stellmotor 12 muß hierbei bestromt sein.In the embodiment of the invention shown in FIG. 6, the motor control lever 10 is designed as a two-armed lever which can be pivoted about an axis 26 designed as an adjustment eccentric. The actuator 13 of the servomotor 12 is articulated on the lower lever arm of the motor actuating lever 10, as seen in FIG. The other lever arm has at its free end a stroke curve 27 which is shaped such that the motor control lever 10 has the overall shape of a boot, the running surface of which is formed by the stroke curve 27. The throttle valve actuating lever 6 bears against this lifting curve 27, which lever is firmly connected to the throttle valve shaft 2 that actuates the throttle valve 3 in the throttle valve neck 1. An adjusting spring 28, which is arranged on the actuator 13, biases the motor control lever 10 in a counterclockwise direction of rotation. In the position of the components shown in FIG. 6, the throttle valve 3 is closed. The servomotor 12 must be energized.

Wird der Stellmotor 12 stärker bestromt als in Figur 6, so wird das Stellglied 13 zunehmend in den Stellmotor 12 hineingezogen. Die sich bei maximaler Bestromung ergeben­de Stellung, bei der die Drosselklappe 3 maximal geöff­net ist, ist in Figur 7 gezeigt. Der Motorstellhebel 10 hat sich hierbei so weit im Uhrzeigersinn verschwenkt, daß er mit seiner Hubkurve 27 den Drosselklappenstell­hebel 6 entgegen dem Uhrzeigersinn entsprechend ver­schwenkt hat und nunmehr mit einem linken Bereich der Hubkurve 27 gegen den Drosselklappenstellhebel 6 an­liegt.If the servomotor 12 is supplied with more current than in FIG. 6, the actuator 13 is increasingly drawn into the servomotor 12. The position resulting at maximum current supply, in which the throttle valve 3 is opened to the maximum, is shown in FIG. 7. The motor control lever 10 has pivoted so far clockwise that it has pivoted the throttle valve control lever 6 counterclockwise with its stroke curve 27 and now bears against the throttle valve control lever 6 with a left region of the stroke curve 27.

Fällt die elektrische Energie des Stellmotors 12 aus, dann bewegt sich das Stellglied 13 infolge der Wirkung der Stellfeder 28 maximal aus dem Stellmotor 12 heraus und der Motorstellhebel 10 wird entgegen dem Uhrzeiger­sinn um seine Achse 10 verschwenkt. Die sich dabei er­gebende Stellung der Bauteile ist in Figur 8 gezeigt. Die Hubkurve 27 drückt dann mit einem die Form eines Absatzes bildenden Bereich gegen den Drosselklappenstell­hebel 6. Die Drosselklappe 2 ist in dieser Notlaufstel­lung geringfügig geöffnet. Es ergibt sich somit bei der Ausführungsform nach den Figuren 6 die gleiche Abhängig­keit zwischen dem Drosselklappenwinkel und dem Stellweg des Stellgliedes 13.If the electrical energy of the servomotor 12 fails, the actuator 13 moves out of the servomotor 12 as a result of the action of the actuating spring 28 and the motor actuating lever 10 is pivoted counterclockwise about its axis 10. The resulting position of the components is shown in Figure 8. The stroke curve 27 then presses with an area forming the shape of a shoulder against the throttle valve actuating lever 6. The throttle valve 2 is slightly open in this emergency running position. In the embodiment according to FIGS. 6, this results in the same dependency between the throttle valve angle and the travel of the actuator 13.

Claims (8)

1. Drosselklappen-Stelleinrichtung, welche einen mit einem Fahrpedal verbundenen, eine auf einer Drosselklap­penwelle drehfest angeordnete Drosselklappe betätigenden Drosselklappenstellhebel und einen ausschließlich in Öffnungsrichtung der Drosselklappe gegen die Kraft einer Rückstellfeder arbeitenden Stellmotor zur Ermöglichung einer Leerlaufregelung aufweist, dadurch gekennzeichnet, daß zur Betätigung der Drosselklappe (3) durch den Stell­motor (12) ein mit einer wegabhängig umsteuernden Bewe­gungsumkehreinrichtung (15) mechanisch derart mit einem Stellglied (13) des Stellmotors (12) verbundener Motor­stellhebel (10) vorgesehen ist, daß bei einer Verschie­bung des Stellgliedes (13) aus seiner durch die Rück­stellfeder (5) sich ergebenden Stellung die Drossel­klappe (3) zunächst geringfügig in Schließrichtung und dann bei weiterer Verschiebung des Stellgliedes (13) in umgekehrter Richtung schwenkt.1.Throttle valve actuating device which has a throttle valve actuating lever which is connected to an accelerator pedal and which actuates a throttle valve in a rotationally fixed manner on a throttle valve shaft and a servomotor which operates exclusively in the opening direction of the throttle valve against the force of a return spring to enable an idle control, characterized in that for actuating the throttle valve (3) by the servomotor (12) with a path-dependent reversing movement reversing device (15) mechanically connected to an actuator (13) of the servomotor (12) motor control lever (10) is provided that upon displacement of the actuator (13) from it by the return spring (5) resulting position, the throttle valve (3) initially pivots slightly in the closing direction and then in the opposite direction upon further displacement of the actuator (13). 2. Drosselklappen-Stelleinrichtung nach Anspruch 1, da­durch gekennzeichnet, daß ein drehfest mit der Drossel­klappenwelle (2) verbundener, von der Rückstellfeder (5) in Schließrichtung der Drosselklappe (3) vorgespannter, zweiarmiger Mitnehmerhebel (4) vorgesehen ist, gegen den von einer Seite her der Drosselklappenstellhebel (6) mit einem Mitnehmer (7) an einem Hebelarm des Mitnehmer­hebels (4) anliegt und gegen den von der anderen Seite her der Motorstellhebel (10) mit einem Mitnehmer (11) an dem anderen Hebelarm anliegt.2. Throttle valve actuating device according to claim 1, characterized in that a rotatably connected to the throttle valve shaft (2), from the return spring (5) in the closing direction of the throttle valve (3) biased, two-armed driver lever (4) is provided, against that of one On the side, the throttle valve control lever (6) with a driver (7) rests on a lever arm of the driver lever (4) and against which, from the other side, the engine control lever (10) with a driver (11) rests on the other lever arm. 3. Drosselklappen-Stelleinrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Bewegungsumkehr­einrichtung (15) einen am Motorstellhebel (10) mit einem Kniehebelgelenk (17) und am Stellglied (13) des Stell­motors (12) angelenkten Zwischenhebel (16) aufweist, welcher in der sich ohne Energiebeaufschlagung des Stell­motors (12) ergebenden Endstellung durch eine Stellfeder (14) gegen einen gehäusefesten Anschlag (20) zwischen der Anlenkung am Motorstellhebel (10) und dem Stellglied (13) gehalten ist und daß der Motorstellhebel (10) auf der dem Anschlag (20) gegenüberliegenden Seite einen Mit­nehmer (18) aufweist, gegen den der Zwischenhebel (16) nach einer geringfügigen Verschwenkung in Stellrichtung des Stellmotors (12) bewegbar ist.3. Throttle valve actuating device according to claims 1 or 2, characterized in that the movement reversing device (15) has an intermediate lever (16) articulated on the motor actuating lever (10) with a toggle lever joint (17) and on the actuator (13) of the servomotor (12) which is held in the end position resulting from the actuating motor (12) not being energized by an actuating spring (14) against a stop (20) fixed to the housing between the linkage on the motor actuating lever (10) and the actuator (13) and that the motor actuating lever (10) on the side opposite the stop (20) has a driver (18) against which the intermediate lever (16) can be moved after a slight pivoting in the direction of adjustment of the servomotor (12). 4. Drosselklappen-Stelleinrichtung nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Motorstellhebel (10) und der Zwischenhebel (16) durch eine am Kniehebelgelenk (17) angeordnete, schwä­cher als die Stellfeder (14) ausgebildete Schenkelfeder (19) in Einknickstellung vorgespannt sind.4. Throttle valve actuating device according to at least one of the preceding claims, characterized in that the motor control lever (10) and the intermediate lever (16) by a toggle lever joint (17) arranged, weaker than the actuating spring (14) formed leg spring (19) in the folded position are biased. 5. Drosselklappen-Stelleinrichtung nach zumindest einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Bewegungsumkehreinrichtung (15) einen Winkelhebel (21) aufweist, gegen dessen einen Hebelarm (22) der Motorstellhebel (10) unter Bildung einer Kippachse und gegen dessen anderen Hebelarm (25) das Stellglied (13) des Stellmotors (12) durch eine Stellfeder (14) gehalten ist und daß am Ende des Stellgliedes (13) ein nach einem kurzen Hub in die sich durch Energiebeaufschlagung des Stellmotors (12) ergebende Richtung gegen den Motorstell­hebel (10) gelangender Mitnehmer (23) vorgesehen ist.5. Throttle valve actuating device according to at least one of the preceding claims, characterized in that the movement reversing device (15) has an angle lever (21) against whose one lever arm (22) the motor control lever (10) forming a tilt axis and against its other lever arm ( 25) the actuator (13) of the servomotor (12) is held by an adjusting spring (14) and that at the end of the actuator (13) after a short stroke in the direction resulting from the energization of the servomotor (12) against the motor control lever ( 10) arriving driver (23) is provided. 6. Drosselklappen-Stelleinrichtung nach Anspruch 1, da­durch gekennzeichnet, daß die Bewegungsumkehreinrichtung (15) durch eine Hubkurve (27) am Motorstellhebel (10) gebildet ist, gegen die der Drosselklappenstellhebel (6) anliegt6. Throttle valve actuating device according to claim 1, characterized in that the movement reversing device (15) is formed by a lifting curve (27) on the engine control lever (10) against which the throttle valve control lever (6) abuts 7. Drosselklappen-Stelleinrichtung nach Anspruch 6, da­durch gekennzeichnet, daß der Motorstellhebel (10) als um eine Achse (26) schwenkbarer, zweiarmiger Hebel ausge­bildet ist, an dessen einem Hebelarm das Stellglied (13) des Stellmotors (12) angelenkt ist und dessen anderer Hebelarm die Hubkurve (27) aufweist.7. Throttle valve actuating device according to claim 6, characterized in that the motor control lever (10) is designed as a pivotable about an axis (26), two-armed lever, on one lever arm of which the actuator (13) of the servomotor (12) is articulated and the latter another lever arm has the stroke curve (27). 8. Drosselklappen-Stelleinrichtung nach Anspruch 7, da­durch gekennzeichnet, daß die Achse (26) des Motorstell­hebels (10) als eine Verstellung des Motorstellhebels (10) ermöglichender Einstellexzenter ausgebildet ist.8. Throttle valve actuating device according to claim 7, characterized in that the axis (26) of the engine control lever (10) is designed as an adjustment of the engine control lever (10) enabling adjustment eccentric.
EP89109680A 1989-04-05 1989-05-30 Positioning device for a throttle valve Expired - Lifetime EP0390961B1 (en)

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DE3910948 1989-04-05
DE3910948 1989-04-05
DE3916296 1989-05-19
DE3916296A DE3916296A1 (en) 1989-04-05 1989-05-19 THROTTLE ADJUSTER

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EP0390961A1 true EP0390961A1 (en) 1990-10-10
EP0390961B1 EP0390961B1 (en) 1992-05-13

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DE58901427D1 (en) 1992-06-17
DE3916296A1 (en) 1990-10-11
EP0390961B1 (en) 1992-05-13

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