EP0388505A2 - Load control apparatus - Google Patents

Load control apparatus Download PDF

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Publication number
EP0388505A2
EP0388505A2 EP89110065A EP89110065A EP0388505A2 EP 0388505 A2 EP0388505 A2 EP 0388505A2 EP 89110065 A EP89110065 A EP 89110065A EP 89110065 A EP89110065 A EP 89110065A EP 0388505 A2 EP0388505 A2 EP 0388505A2
Authority
EP
European Patent Office
Prior art keywords
adjustment device
load adjustment
actuating
throttle valve
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89110065A
Other languages
German (de)
French (fr)
Other versions
EP0388505B1 (en
EP0388505A3 (en
Inventor
Arnold Mann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann VDO AG
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Mannesmann VDO AG
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Filing date
Publication date
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0388505A2 publication Critical patent/EP0388505A2/en
Publication of EP0388505A3 publication Critical patent/EP0388505A3/en
Application granted granted Critical
Publication of EP0388505B1 publication Critical patent/EP0388505B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87096—Valves with separate, correlated, actuators
    • Y10T137/87113—Interlocked
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87096—Valves with separate, correlated, actuators
    • Y10T137/87121—Coaxial stems
    • Y10T137/87129—Rotary

Definitions

  • the invention relates to a load adjustment device with a throttle valve arranged in an intake duct, the actuating shaft of which is driven by an actuating motor.
  • Load adjustment devices of the type mentioned have recently been installed frequently in place of mechanical load adjustment devices in which the accelerator pedal is connected to the throttle valve via a linkage or a cable pull.
  • the electrical transmission of the accelerator pedal movement to the throttle valve has a number of advantages over the mechanical one; in particular, the laying of electrical transmission lines is considerably less complex than the arrangement of a mechanical transmission device.
  • a mechanical transmission device is usually not completely dispensed with, but instead carries a so-called emergency actuation device with play, so that if the electrics fail after this play has been overcome, a mechanical throttle valve actuation is possible.
  • This additional mechanical emergency actuation device which is provided for reasons of redundancy, increases the Effort for such a load adjustment device is of course considerable.
  • the object of the invention is to design a load adjustment device of the type mentioned at the outset with as little effort as possible so that actuation is still possible even if important components fail.
  • a second intake duct with a further throttle valve is provided in parallel to the intake duct, the actuating shaft of the second throttle valve also being driven by an actuator and both throttle valves in the intake duct being arranged so as to be completely pivotable and in that the two actuating shafts are actuated by one Carrier connection having play are connected to one another.
  • a particularly advantageous embodiment of the invention is that the servomotors are designed as a stepper motor.
  • the arrangement of stepper motors has the advantage that there is no need for complex feedback potentiometers for the throttle valves and thus also for the complex laying of feedback lines. It is sufficient if a simple switch generates a signal when the throttle valve is closed, so that the zero position can be determined when the accelerator pedal is actuated.
  • Another advantage of the stepper motors is that they do not have a collector, so that the problem due to carbon brushes lifting off does not occur.
  • the load adjustment device is particularly compact if, according to another embodiment of the invention, the servomotors are arranged in mirror image to one another above or below the two intake ducts and are connected to the respective actuating shaft via a gear arranged laterally of the respective intake duct.
  • Another, very advantageous embodiment of the invention is that the play with the throttle valves aligned in the same way is approximately 90 degrees on both sides and the two slip clutches are designed such that they form a positive connection after a relative rotation of 90 degrees.
  • the play By setting the play to 90 degrees, a full actuation of the still intact throttle valve is possible without the frictional force of a slip clutch counteracting it.
  • the idle power of the load adjustment device can be regulated particularly sensitively if the load adjustment device has a control device for actuating only one servo motor for idle control and for synchronously actuating both throttle valves in load operation.
  • a failure of a throttle valve drive can be determined in a simple manner if both actuating shafts are assigned a safety contact for monitoring the rotary movement of the respective actuating shaft.
  • the load adjustment device is designed to be particularly simple in terms of construction if, according to another embodiment of the invention, the driver connection is formed by a sector-shaped projection of the one control shaft and a sector-shaped projection of the other control shaft arranged above it.
  • the slipping clutches are designed to be particularly simple if each slipping clutch has a pin guided radially through the respective adjusting shaft and two stop segments on the respective gearwheel to limit the maximum possible relative movement.
  • the interposition of a gearbox between the respective servomotor and the respective actuating shaft can be dispensed with if the servomotors are arranged directly on the actuating shafts of the throttle valves without the interposition of a gearbox.
  • the actuating shafts can run in alignment with one another so that the driver connection already explained can be used.
  • the actuating shafts run parallel to one another and that in order to form the driver connection, an actuating segment with a circular elongated hole is arranged on each actuating shaft in radial alignment, in which a coupling rod connecting the actuating segments engages.
  • the slip clutches are unnecessary.
  • the driver connection is very simple.
  • FIG. 1 shows a throttle valve connector 1, which has two parallel intake ducts 2, 3, each with a throttle valve 4, 5.
  • the two throttle valves 4, 5 are each arranged on a horizontally arranged actuating shaft 6, 7, both of which are in alignment with one another and are coupled to one another by a driver connection 8 having play.
  • Both actuating shafts 6, 7 are led out laterally from the throttle valve connector 1 and are each connected to a gear 11, 12 there by means of a slip clutch 9, 10.
  • Each gear 11, 12 consists of three intermeshing gear wheels 13, 14, 15, the gear wheel 15 on an output shaft 16 of a servomotor 17 designed as a stepping motor is rotatably arranged.
  • a second servomotor 18, also designed as a stepper motor, is arranged in mirror image of the first servomotor 17 on the upper side of the throttle valve connector 1 and drives the actuating shaft 7 in the same way via the gear 12.
  • each actuating shaft 6, 7 is assigned a safety contact 19, 20 which, when the actuating motor 17, 18 is energized but the actuating shaft 6, 7 is not rotating, controls a warning device 21, 22.
  • FIGS. 2 and 3 show the design of the driver connection 8 more precisely.
  • the mutually facing end faces of the two adjusting shafts 6, 7 each have a sector-shaped projection 23, 24. These projections each have an angle of 90 degrees, so that an angle of 90 degrees also remains between them, as shown in FIG. If the throttle valves 4, 5 move synchronously, the projections 23, 24 lie opposite one another. If, for example, the throttle valve 4 is at a standstill as a result of a defect, the right throttle valve 5 can pivot freely up to 90 degrees. In such a case, the normal operation of the right throttle valve 5 would in no way be hindered by the failed left throttle valve 4.
  • the right throttle valve 5 can be pivoted motor-wise through an angle of 90 degrees, the driver connection 8 taking the left throttle valve 4 with it after a pivoting angle of 90 degrees, so that it can be closed. This results in a relative movement in the slip clutch 9. After the load adjustment device has been repaired, this rotation in the slip clutch must of course be reset.
  • FIG. 4 and 5 illustrate the design of the slip clutch 12. It can be seen that the gear 13b is frictionally connected to the actuating shaft 7 via a plate spring 28. A pin 25 extends radially through the adjusting shaft 7, against which the gear 13b can turn with the stop segments 26, 27 shown in FIG. 5, so that the adjusting shaft 7 is carried in a form-fitting manner. If the gear 13b rotates counterclockwise and the actuating shaft 7 is sufficiently stiff, then there is a relative movement between the gear 13b and the actuating shaft 7 until the other side of the stop segments 26, 27 comes against the pin 25 and then the actuating shaft 7 carries along. Since both gearboxes 11, 12 have such a slip clutch 9, 10, if a gearbox 11, 12 is blocked via the other gearbox, the throttle valve, which is no longer functional, can be moved into the closed position due to a slipping clutch.
  • actuating shafts 6, 7 do not run in alignment, but parallel to one another.
  • Each control shaft 6, 7 is driven directly by a servomotor 17, 18.
  • the driver connection 8 is in turn designed so that both throttle valves 4, 5 can pivot independently of each other up to a maximum of about 90 degrees. In the event of a further pivoting, the other throttle valve 4 or 5 is taken along by the driver connection 8.
  • the structure of the driver connection 8 can be seen in FIG. 7. It has an actuating segment 29, 30 on each actuating shaft 6, 7, each with an arc-shaped elongated hole 31, 32.
  • the ends of a coupling rod 33 each engage in one of the elongated holes 31, 32.
  • closed position of the throttle valves 4 and 5 the coupling rod 33 each against a left boundary of the respective elongated hole 31, 32.
  • the right throttle valve 5 can no longer be actuated by the associated servomotor 18, then the right throttle valve 5 is carried along by the coupling rod 33 after pivoting the left throttle valve 4 by 90 degrees, so that it can be moved into the closed position.

Abstract

Two intake ducts (2, 3), each with a throttle valve (4, 5), are provided next to one another in a throttle valve housing (1). The two throttle valves (4, 5) are each driven by a servomotor (17, 18). The control shafts (6, 7) of the throttle valves (4, 5) are connected to one another by a driver connection (8) having some play. Friction clutches (9, 10) permit rotation of each throttle valve (6, 7) in the idling direction even with the transmission (11, 12) or servomotor (17, 18) jammed. <IMAGE>

Description

Die Erfindung betrifft eine Lastverstelleinrichtung mit einer in einem Ansaugkanal angeordneten Drosselklappe, deren Stellwelle von einem Stellmotor angetrieben ist.The invention relates to a load adjustment device with a throttle valve arranged in an intake duct, the actuating shaft of which is driven by an actuating motor.

Lastverstelleinrichtungen der genannten Art werden in neuerer Zeit vielfach an Stelle mechanischer Lastver­stelleinrichtungen, bei denen das Fahrpedal über ein Gestänge oder einen Seilzug mit der Drosselklappe verbun­den ist, eingebaut. Die elektrische Übertragung der Fahr­pedalbewegung auf die Drosselklappe weist gegenüber der mechanischen eine Reihe von Vorzügen auf, insbesondere ist die Verlegung elektrischer Übertragungsleitungen wesentlich weniger aufwendig als die Anordnung einer mechanischen Übertragungseinrichtung. Aus Sicherheits­gründen verzichtet man jedoch meist nicht völlig auf eine mechanische Übertragungseinrichtung, sondern führt eine sogenannte Notbetätigungseinrichtung mit Spiel mit, so daß bei Ausfall der Elektrik nach Überwindung dieses Spiels eine mechanische Drosselklappenbetätigung möglich ist. Diese aus Gründen der Redundanz vorgesehene, zusätz­liche mechanische Notbetätigungseinrichtung erhöht den Aufwand für eine solche Lastverstelleinrichtung natür­lich erheblich.Load adjustment devices of the type mentioned have recently been installed frequently in place of mechanical load adjustment devices in which the accelerator pedal is connected to the throttle valve via a linkage or a cable pull. The electrical transmission of the accelerator pedal movement to the throttle valve has a number of advantages over the mechanical one; in particular, the laying of electrical transmission lines is considerably less complex than the arrangement of a mechanical transmission device. For safety reasons, however, a mechanical transmission device is usually not completely dispensed with, but instead carries a so-called emergency actuation device with play, so that if the electrics fail after this play has been overcome, a mechanical throttle valve actuation is possible. This additional mechanical emergency actuation device, which is provided for reasons of redundancy, increases the Effort for such a load adjustment device is of course considerable.

Der Erfindung liegt die Aufgabe zugrunde, eine Lastver­stelleinrichtung der eingangs genannten Art mit mög­lichst geringem Aufwand so auszubilden, daß auch bei Ausfall wichtiger Bauteile noch eine Betätigung möglich ist.The object of the invention is to design a load adjustment device of the type mentioned at the outset with as little effort as possible so that actuation is still possible even if important components fail.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß parallel zu dem Ansaugkanal ein zweiter Ansaugkanal mit einer weiteren Drosselklappe vorgesehen ist, wobei die Stellwelle der zweiten Drosselklappe ebenfalls von einem Stellmotor angetrieben ist und beide Drosselklappen im Ansaugkanal vollständig verschwenkbar angeordnet sind und daß die beiden Stellwellen durch eine Spiel auf­weisende Mitnehmerverbindung miteinander verbunden sind.This object is achieved in that a second intake duct with a further throttle valve is provided in parallel to the intake duct, the actuating shaft of the second throttle valve also being driven by an actuator and both throttle valves in the intake duct being arranged so as to be completely pivotable and in that the two actuating shafts are actuated by one Carrier connection having play are connected to one another.

Durch diese Aufteilung des Luftstromes auf zwei Ansaug­kanäle mit jeweils einer Drosselklappe und durch die Anordnung von insgesamt zwei Stellmotoren erreicht man mit sehr geringem Aufwand eine hohe Redundanz. Da insge­samt zwei Stellmotoren vorgesehen sind, kann bei Ausfall eines Stellmotors der andere noch die dem ausgefallenen Stellmotor zugeordnete Drosselklappe in Schließstellung bewegen, indem man die noch funktionstüchtige Drossel­klappe über das Spiel der Mitnehmerverbindung hinaus ver­schwenkt, also durchtauchen läßt und dadurch die andere Drosselklappe mitführt. Da die Mitnehmerverbindung Spiel aufweist, ist nach dem Zurückstellen der Drosselklappe mit defektem Antrieb eine normale Betätigung der anderen Drosselklappe mit normalen Stellkräften möglich. Mit nur einer funktionstüchtigen Drosselklappe läßt sich ein Kraftfahrzeug im Teillastbereich mit allen der Anlage aufgegebenen Regelfunktionen normal betreiben. Lediglich der obere Vollastbereich ist nicht mehr erreichbar.By dividing the air flow into two intake ducts, each with a throttle valve, and by arranging a total of two servomotors, high redundancy can be achieved with very little effort. Since a total of two servomotors are provided, if one servomotor fails, the other can still move the throttle valve assigned to the failed servomotor in the closed position by pivoting the still functional throttle valve beyond the play of the driver connection, i.e. allowing it to dive through and thereby carrying the other throttle valve with it. Since the driver connection has play, a normal actuation of the other throttle valve with normal actuating forces is possible after resetting the throttle valve with a defective drive. With only one functional throttle valve, a motor vehicle can be operated normally in the partial-load range with all the control functions given to the system. Only the upper full load range can no longer be reached.

Dank der Erfindung sind für die Lastverstelleinrichtung keine Rückstellfedern und keine Entkoppelungsfedern er­forderlich, so daß die Gegenkräfte am Fahrpedal geringer und besser festlegbar sind. Ein weiterer Vorteil der Spiel aufweisenden Mitnehmerverbindung besteht darin, daß jede Drosselklappe über ihren Stellbereich unabhän­gig von der anderen verstellt werden kann und daß erst nach Überwindung dieses Spiels eine Kopplung mit der anderen Drosselklappe eintritt.Thanks to the invention, no return springs and no decoupling springs are required for the load adjustment device, so that the opposing forces on the accelerator pedal are lower and can be better determined. A further advantage of the driver connection having play is that each throttle valve can be adjusted independently of the other over its adjustment range and that a coupling with the other throttle valve occurs only after this game has been overcome.

Eine besonders vorteilhafte Ausgestaltung der Erfindung besteht darin, daß die Stellmotoren als Schrittmotor ausgebildet sind. Die Anordnung von Schrittmotoren hat den Vorteil, daß auf aufwendige Rückmeldepotentiometer für die Drosselklappen und damit auch auf die aufwendige Verlegung von Rückmeldeleitungen verzichtet werden kann. Es genügt, wenn ein einfacher Schalter bei geschlossener Drosselklappe ein Signal erzeugt, so daß beim Betätigen des Fahrpedals die Nullstellung festgestellt werden kann. Ein weiterer Vorteil der Schrittmotoren liegt darin, daß diese keinen Kollektor haben, so daß das Problem infolge von Schwingungen abhebender Kohlebürsten nicht auftritt.A particularly advantageous embodiment of the invention is that the servomotors are designed as a stepper motor. The arrangement of stepper motors has the advantage that there is no need for complex feedback potentiometers for the throttle valves and thus also for the complex laying of feedback lines. It is sufficient if a simple switch generates a signal when the throttle valve is closed, so that the zero position can be determined when the accelerator pedal is actuated. Another advantage of the stepper motors is that they do not have a collector, so that the problem due to carbon brushes lifting off does not occur.

Die Lastverstelleinrichtung baut besonders kompakt, wenn gemäß einer anderen Ausgestaltung der Erfindung die Stellmotoren spiegelbildlich zueinander oberhalb oder unterhalb der beiden Ansaugkanäle angeordnet sind und über jeweils ein seitlich des jeweiligen Ansaugkanals angeordnetes Getriebe mit der jeweiligen Stellwelle verbunden sind.The load adjustment device is particularly compact if, according to another embodiment of the invention, the servomotors are arranged in mirror image to one another above or below the two intake ducts and are connected to the respective actuating shaft via a gear arranged laterally of the respective intake duct.

Vorteilhaft ist es, wenn jeweils zwischen dem Getriebe und der zugeordneten Stellwelle eine eine begrenzte Drehbewegung zulassende Rutschkupplung vorgesehen ist. Hierdurch ist eine Notbetätigung auch dann möglich, wenn das Getriebe infolge eines Defektes blockiert. Die Be­ grenzung der maximal möglichen Relativbewegungen beider Rutschkupplungen ist erforderlich, damit über die Rutsch­kupplung der jeweils treibenden Seite die Stellwelle der anderen Seite durch Durchdrehen der anderen Rutschkupp­lung so weit verdreht werden kann, daß die entsprechende Drosselklappe in Schließstellung gelangt. Bei der erfin­dungsgemäßen Lastverstelleinrichtung wird die defekte Drosselklappe gegen die Kraft der ihr zugeordneten Rutschkupplung zurückgestellt, dann jedoch aufgrund des Spiels der Mitnehmerverbindung ohne entgegenwirkende Reibkraft die funktionstüchtige Drosselklappe geregelt.It is advantageous if a slipping clutch that allows a limited rotational movement is provided between the gearbox and the associated actuating shaft. As a result, emergency operation is also possible if the transmission is blocked due to a defect. Thieves Limitation of the maximum possible relative movements of both slip clutches is necessary so that the adjusting shaft of the other side can be rotated by turning the other slip clutch so far that the corresponding throttle valve reaches the closed position via the slip clutch of the driving side. In the load adjustment device according to the invention, the defective throttle valve is reset against the force of the slip clutch assigned to it, but then the functional throttle valve is regulated due to the play of the driver connection without counteracting frictional force.

Eine andere, sehr vorteilhafte Ausgestaltung der Erfin­dung besteht darin, daß das Spiel bei gleich ausgerich­teten Drosselklappen nach beiden Seiten hin jeweils etwa 90 Grad beträgt und die beiden Rutschkupplungen so aus­gelegt sind, daß sie nach einer Relativverdrehung von 90 Grad einen Formschluß bilden. Durch diese Festlegung des Spiels auf 90 Grad ist eine vollständige Betätigung der noch intakten Drosselklappe möglich, ohne daß dabei die Reibkraft einer Rutschkupplung entgegenwirkt.Another, very advantageous embodiment of the invention is that the play with the throttle valves aligned in the same way is approximately 90 degrees on both sides and the two slip clutches are designed such that they form a positive connection after a relative rotation of 90 degrees. By setting the play to 90 degrees, a full actuation of the still intact throttle valve is possible without the frictional force of a slip clutch counteracting it.

Die Leerlaufleistung der Lastverstelleinrichtung ist besonders feinfühlig regelbar, wenn die Lastverstellein­richtung eine Steuereinrichtung zum Betätigen nur eines Stellmotors zwecks Leerlaufregelung und zum synchronen Betätigen beider Drosselklappen im Lastbetrieb hat.The idle power of the load adjustment device can be regulated particularly sensitively if the load adjustment device has a control device for actuating only one servo motor for idle control and for synchronously actuating both throttle valves in load operation.

Ein Ausfall eines Drosselklappenantriebs ist auf ein­fache Weise feststellbar, wenn beiden Stellwellen ein Sicherheitskontakt zur Überwachung der Drehbewegung der jeweiligen Stellwelle zugeordnet ist.A failure of a throttle valve drive can be determined in a simple manner if both actuating shafts are assigned a safety contact for monitoring the rotary movement of the respective actuating shaft.

Konstruktiv besonders einfach ist die Lastverstellein­richtung gestaltet, wenn gemäß einer anderen Ausgestal­tung der Erfindung die Mitnehmerverbindung durch einen sektorförmigen Vorsprung der einen Stellwelle und einen darüber angeordneten, sektorförmigen Vorsprung der ande­ren Stellwelle gebildet ist.The load adjustment device is designed to be particularly simple in terms of construction if, according to another embodiment of the invention, the driver connection is formed by a sector-shaped projection of the one control shaft and a sector-shaped projection of the other control shaft arranged above it.

Die Rutschkupplungen sind besonders einfach gestaltet, wenn jede Rutschkupplung zur Begrenzung der maximal mög­lichen Relativbewegung einen radial durch die jeweilige Stellwelle geführten Stift und zwei Anschlagsegmente am jeweiligen Zahnrad aufweist.The slipping clutches are designed to be particularly simple if each slipping clutch has a pin guided radially through the respective adjusting shaft and two stop segments on the respective gearwheel to limit the maximum possible relative movement.

Auf die Zwischenschaltung jeweils eines Getriebes zwi­schen dem jeweiligen Stellmotor und der jeweiligen Stell­welle kann man verzichten, wenn die Stellmotoren ohne Zwischenschaltung eines Getriebes unmittelbar auf den Stellwellen der Drosselklappen angeordnet sind. Die Stellwellen können dabei fluchtend zueinander verlaufen, so daß die bereits erläuterte Mitnehmerverbindung An­wendung finden kann.The interposition of a gearbox between the respective servomotor and the respective actuating shaft can be dispensed with if the servomotors are arranged directly on the actuating shafts of the throttle valves without the interposition of a gearbox. The actuating shafts can run in alignment with one another so that the driver connection already explained can be used.

Möglich ist es jedoch auch, daß die Stellwellen parallel zueinander verlaufen und daß zur Bildung der Mitnehmer­verbindung auf jeder Stellwelle in radialer Ausrichtung ein Stellsegment mit einem kreisbogenförmigen Langloch angeordnet ist, in welches eine die Stellsegmente mit­einander verbindende Koppelstange eingreift. Bei einer solchen Ausführungsform erübrigen sich die Rutschkupp­lungen. Die Mitnehmerverbindung ihrerseits ist sehr ein­fach ausgebildet.However, it is also possible that the actuating shafts run parallel to one another and that in order to form the driver connection, an actuating segment with a circular elongated hole is arranged on each actuating shaft in radial alignment, in which a coupling rod connecting the actuating segments engages. In such an embodiment, the slip clutches are unnecessary. The driver connection is very simple.

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

  • Fig. 1 einen Querschnitt durch die erfindungsgemäße Lastverstelleinrichtung,
  • Fig. 2 eine gegenüber Figur 1 vergrößerte Dar­stellung einer in Figur 1 mit II gekennzeich­neten Einzelheit,
  • Fig. 3 einen Schnitt durch die Einzelheit entlang der Linie III - III in Figur 2,
  • Fig. 4 eine gegenüber Figur 1 vergrößerte Darstel­lung des Bereiches eines Zahnrades mit der Rutschkupplung,
  • Fig. 5 einen Schnitt durch die Rutschkupplung nach Figur 4,
  • Fig. 6 einen schematischen Querschnitt durch eine zweite Ausführungsform der erfindungsgemäßen Lastverstelleinrichtung,
  • Fig. 7 eine Vorderansicht der Lastverstelleinrich­tung nach Figur 6.
The invention allows numerous embodiments. To further clarify its basic principle, two of them are shown in the drawing and are described below. They show in her
  • 1 shows a cross section through the load adjustment device according to the invention,
  • 2 is an enlarged view of a detail marked II in FIG. 1,
  • 3 shows a section through the detail along the line III-III in FIG. 2,
  • 4 shows an enlarged representation of the area of a gearwheel with the slip clutch,
  • 5 shows a section through the slip clutch according to FIG. 4,
  • 6 shows a schematic cross section through a second embodiment of the load adjustment device according to the invention,
  • 7 shows a front view of the load adjustment device according to FIG. 6.

Die Figur 1 zeigt einen Drosselklappenstutzen 1, welcher zwei parallellaufende Ansaugkanäle 2, 3 mit jeweils einer Drosselklappe 4, 5 hat. Die beiden Drosselklappen 4, 5 sind jeweils auf einer horizontal angeordneten Stellwelle 6, 7 angeordnet, die beide miteinander fluch­ten und durch eine Spiel aufweisende Mitnehmerverbindung 8 miteinander gekoppelt sind. Beide Stellwellen 6, 7 sind seitlich aus dem Drosselklappenstutzen 1 herausge­führt und dort jeweils mittels einer Rutschkupplung 9, 10 mit einem Getriebe 11, 12 verbunden. Jedes Getriebe 11, 12 besteht aus drei ineinander kämmenden Zahnrädern 13, 14, 15, wobei das Zahnrad 15 auf einer Abtriebswelle 16 eines als Schrittmotors ausgebildeten Stellmotors 17 drehfest angeordnet ist. Ein zweiter ebenfalls als Schrittmotor ausgebildeter Stellmotor 18 ist spiegelbild­lich zum ersten Stellmotor 17 auf der Oberseite des Dros­selklappenstutzens 1 angeordnet und treibt auf gleiche Weise über das Getriebe 12 die Stellwelle 7 an.FIG. 1 shows a throttle valve connector 1, which has two parallel intake ducts 2, 3, each with a throttle valve 4, 5. The two throttle valves 4, 5 are each arranged on a horizontally arranged actuating shaft 6, 7, both of which are in alignment with one another and are coupled to one another by a driver connection 8 having play. Both actuating shafts 6, 7 are led out laterally from the throttle valve connector 1 and are each connected to a gear 11, 12 there by means of a slip clutch 9, 10. Each gear 11, 12 consists of three intermeshing gear wheels 13, 14, 15, the gear wheel 15 on an output shaft 16 of a servomotor 17 designed as a stepping motor is rotatably arranged. A second servomotor 18, also designed as a stepper motor, is arranged in mirror image of the first servomotor 17 on the upper side of the throttle valve connector 1 and drives the actuating shaft 7 in the same way via the gear 12.

Wie die Figur 1 ebenfalls zeigt, ist jeder Stellwelle 6, 7 ein Sicherheitskontakt 19, 20 zugeordnet, der bei be­stromtem Stellmotor 17, 18, jedoch sich nicht drehender Stellwelle 6, 7, eine Warneinrichtung 21, 22 ansteuert.As FIG. 1 also shows, each actuating shaft 6, 7 is assigned a safety contact 19, 20 which, when the actuating motor 17, 18 is energized but the actuating shaft 6, 7 is not rotating, controls a warning device 21, 22.

Die Figuren 2 und 3 lassen die Gestaltung der Mitnehmer­verbindung 8 genauer erkennen. Die einander zugewandten Stirnflächen der beiden Stellwellen 6, 7 weisen jeweils einen sektorförmigen Vorsprung 23, 24 auf. Diese Vor­sprünge umfassen jeweils einen Winkel von 90 Grad, so daß zwischen ihnen ebenfalls ein Winkel von 90 Grad ver­bleibt, was die Figur 3 zeigt. Bewegen sich die Drossel­klappen 4, 5 synchron, dann liegen die Vorsprünge 23, 24 einander gegenüber. Steht beispielsweise die Drossel­klappe 4 infolge eines Defektes still, dann kann sich die rechte Drosselklappe 5 ungehindert bis zu 90 Grad verschwenken. Die normale Betätigung der rechten Drossel­klappe 5 würde in einem solchen Falle von der ausgefal­lenen, linken Drosselklappe 4 in keiner Weise behindert. Ist die linke Drosselklappe 4 in Offenstellung ausge­fallen, dann kann man die rechte Drosselklappe 5 moto­risch über einen Winkel von 90 Grad hinaus verschwenken, wobei nach einem Schwenkwinkel von 90 Grad die Mitnehmer­verbindung 8 die linke Drosselklappe 4 mitnimmt, so daß diese geschlossen werden kann. Dabei kommt es zu einer Relativbewegung in der Rutschkupplung 9. Nach einer Reparatur der Lastverstelleinrichtung muß diese Ver­drehung in der Rutschkupplung natürlich wieder zurück­gestellt werden.Figures 2 and 3 show the design of the driver connection 8 more precisely. The mutually facing end faces of the two adjusting shafts 6, 7 each have a sector-shaped projection 23, 24. These projections each have an angle of 90 degrees, so that an angle of 90 degrees also remains between them, as shown in FIG. If the throttle valves 4, 5 move synchronously, the projections 23, 24 lie opposite one another. If, for example, the throttle valve 4 is at a standstill as a result of a defect, the right throttle valve 5 can pivot freely up to 90 degrees. In such a case, the normal operation of the right throttle valve 5 would in no way be hindered by the failed left throttle valve 4. If the left throttle valve 4 has failed in the open position, then the right throttle valve 5 can be pivoted motor-wise through an angle of 90 degrees, the driver connection 8 taking the left throttle valve 4 with it after a pivoting angle of 90 degrees, so that it can be closed. This results in a relative movement in the slip clutch 9. After the load adjustment device has been repaired, this rotation in the slip clutch must of course be reset.

Die Figuren 4 und 5 verdeutlichen die Gestaltung der Rutschkupplung 12. Zu sehen ist, daß das Zahnrad 13b über eine Tellerfeder 28 reibschlüssig mit der Stell­welle 7 verbunden ist. Durch die Stellwelle 7 führt ein Stift 25 radial hindurch, gegen den das Zahnrad 13b bei einer Drehung im Uhrzeigersinn mit in Figur 5 gezeigten Anschlagsegmenten 26, 27 zu gelangen vermag, so daß die Stellwelle 7 formschlüssig mitgeführt wird. Dreht sich das Zahnrad 13b entgegen dem Uhrzeigersinn und ist die Stellwelle 7 ausreichend schwergängig, dann kommt es zu einer Relativbewegung zwischen dem Zahnrad 13b und der Stellwelle 7, bis die jeweils andere Seite der Anschlag­segmente 26, 27 gegen den Stift 25 gelangt und dann die Stellwelle 7 mitführt. Da beide Getriebe 11, 12 eine solche Rutschkupplung 9, 10 aufweisen, kann bei Blockie­ren eines Getriebes 11, 12 über das andere Getriebe auf­grund einer durchrutschenden Rutschkupplung die jeweils nicht mehr funktionstüchtige Drosselklappe in Schließ­stellung bewegt werden.Figures 4 and 5 illustrate the design of the slip clutch 12. It can be seen that the gear 13b is frictionally connected to the actuating shaft 7 via a plate spring 28. A pin 25 extends radially through the adjusting shaft 7, against which the gear 13b can turn with the stop segments 26, 27 shown in FIG. 5, so that the adjusting shaft 7 is carried in a form-fitting manner. If the gear 13b rotates counterclockwise and the actuating shaft 7 is sufficiently stiff, then there is a relative movement between the gear 13b and the actuating shaft 7 until the other side of the stop segments 26, 27 comes against the pin 25 and then the actuating shaft 7 carries along. Since both gearboxes 11, 12 have such a slip clutch 9, 10, if a gearbox 11, 12 is blocked via the other gearbox, the throttle valve, which is no longer functional, can be moved into the closed position due to a slipping clutch.

Bei der Ausführungsform nach den Figuren 6 und 7 wurden mit der nach den vorangehenden Figuren funktionell gleichartige Teile mit gleichen Positionszahlen ver­sehen. Bei dieser Ausführungsform verlaufen die Stellwel­len 6, 7 nicht fluchtend, sondern parallel zueinander. Jede Stellwelle 6, 7 wird jeweils unmittelbar von einem Stellmotor 17, 18 angetrieben. Die Mitnehmerverbindung 8 ist wiederum so gestaltet, daß beide Drosselklappen 4, 5 unabhängig voneinander bis maximal etwa 90 Grad schwen­ken können. Bei einer weiteren Verschwenkung wird durch die Mitnehmerverbindung 8 die jeweils andere Drossel­klappe 4 oder 5 mitgenommen.In the embodiment according to FIGS. 6 and 7, parts that are functionally similar have been provided with the same item numbers with the parts according to the preceding figures. In this embodiment, the actuating shafts 6, 7 do not run in alignment, but parallel to one another. Each control shaft 6, 7 is driven directly by a servomotor 17, 18. The driver connection 8 is in turn designed so that both throttle valves 4, 5 can pivot independently of each other up to a maximum of about 90 degrees. In the event of a further pivoting, the other throttle valve 4 or 5 is taken along by the driver connection 8.

Der Aufbau der Mitnehmerverbindung 8 ist der Figur 7 zu entnehmen. Sie hat auf jeder Stellwelle 6, 7 ein Stell­segment 29, 30 mit jeweils einem kreisbogenförmigen Lang­loch 31, 32. Eine Koppelstange 33 greift mit ihren Enden jeweils in eines der Langlöcher 31, 32. In der darge­stellten, geschlossenen Stellung der Drosselklappen 4 und 5 liegt die Koppelstange 33 jeweils gegen eine linke Begrenzung des jeweiligen Langloches 31, 32 an. Kann beispielsweise die rechte Drosselklappe 5 nicht mehr vom zugeordneten Stellmotor 18 betätigt werden, dann wird die rechte Drosselklappe 5 nach einem Verschwenken der linken Drosselklappe 4 um 90 Grad von der Koppelstange 33 mitgenommen, so daß sie in Schließstellung bewegt werden kann.The structure of the driver connection 8 can be seen in FIG. 7. It has an actuating segment 29, 30 on each actuating shaft 6, 7, each with an arc-shaped elongated hole 31, 32. The ends of a coupling rod 33 each engage in one of the elongated holes 31, 32. In the illustrated, closed position of the throttle valves 4 and 5 the coupling rod 33 each against a left boundary of the respective elongated hole 31, 32. For example, if the right throttle valve 5 can no longer be actuated by the associated servomotor 18, then the right throttle valve 5 is carried along by the coupling rod 33 after pivoting the left throttle valve 4 by 90 degrees, so that it can be moved into the closed position.

Claims (11)

1. Lastverstelleinrichtung mit einer in einem Ansaug­kanal angeordneten Drosselklappe, deren Stellwelle von einem Stellmotor angetrieben ist, dadurch gekennzeich­net, daß parallel zu dem Ansaugkanal (2) ein zweiter An­saugkanal (3) mit einer weiteren Drosselklappe (5) vor­gesehen ist, wobei die Stellwelle der zweiten Drossel­klappe (5) ebenfalls von einem Stellmotor (18) angetrie­ben ist, daß beide Drosselklappen (4, 5) im Ansaugkanal (2, 3) vollständig verschwenkbar angeordnet sind und daß die beiden Stellwellen (6, 7) durch eine Spiel aufwei­sende Mitnehmerverbindung (8) miteinander verbunden sind.1. Load adjustment device with a throttle valve arranged in an intake duct, the actuating shaft of which is driven by a servomotor, characterized in that a second intake duct (3) with a further throttle valve (5) is provided parallel to the intake duct (2), the actuating shaft of the second throttle valve (5) is also driven by an actuator (18), that both throttle valves (4, 5) in the intake duct (2, 3) are arranged so that they can pivot completely and that the two actuating shafts (6, 7) are provided with a play connection ( 8) are interconnected. 2. Lastverstelleinrichtung nach Anspruch 1, dadurch ge­kennzeichnet, daß die Stellmotoren (17, 18) als Schritt­motor ausgebildet sind.2. Load adjustment device according to claim 1, characterized in that the servomotors (17, 18) are designed as a stepper motor. 3. Lastverstelleinrichtung nach den Ansprüchen 1 und 2, dadurch gekennnzeichnet, daß die Stellmotoren (17, 18) spiegelbildlich zueinander oberhalb oder unterhalb der beiden Ansaugkanäle (2, 3) angeordnet sind und über je­weils ein seitlich des jeweiligen Ansaugkanals (2, 3) angeordnetes Getriebe (11, 12) mit der jeweiligen Stell­ welle (6, 7) verbunden sind.3. Load adjustment device according to claims 1 and 2, characterized in that the servomotors (17, 18) are arranged in mirror image to one another above or below the two intake ducts (2, 3) and via a respective side of the respective intake duct (2, 3) Gear (11, 12) with the respective position shaft (6, 7) are connected. 4. Lastverstelleinrichtung nach Anspruch 3, dadurch ge­kennzeichnet, daß jeweils zwischen dem Getriebe (11, 12) und der zugeordneten Stellwelle (6) eine eine begrenzte Drehbewegung zulassende Rutschkupplung (9, 10) vorge­sehen ist.4. Load adjusting device according to claim 3, characterized in that between the gear (11, 12) and the associated actuating shaft (6) a limited rotational movement allowing slip clutch (9, 10) is provided. 5. Lastverstelleinrichtung nach zumindest einem der vor­angehenden Ansprüche, dadurch gekennzeichnet, daß das Spiel der Mitnehmerverbindung (8) bei gleich ausgerich­teten Drosselklappen (4, 5) nach beiden Seiten hin jeweils etwa 90 Grad beträgt und die beiden Rutschkupp­lungen (10, 11) so ausgelegt sind, daß sie nach einer Relativverdrehung von 90 Grad einen Formschluß bilden.5. Load adjustment device according to at least one of the preceding claims, characterized in that the play of the driver connection (8) with identically aligned throttle valves (4, 5) is approximately 90 degrees on both sides and the two slip clutches (10, 11) are designed in this way are that they form a positive connection after a relative rotation of 90 degrees. 6. Lastverstelleinrichtung nach Anspruch 5, gekennzeich­net durch eine Steuereinrichtung zum Betätigen nur eines Stellmotors (17 oder 18) zwecks Leerlaufregelung und zum synchronen Betätigen beider Drosselklappen (17, 18) im Lastbetrieb.6. Load adjustment device according to claim 5, characterized by a control device for actuating only one servomotor (17 or 18) for idle control and for synchronously actuating both throttle valves (17, 18) in load operation. 7. Lastverstelleinrichtung nach zumindest einem der vor­angehenden Ansprüche, dadurch gekennzeichnet, daß beiden Stellwellen (6, 7) ein Sicherheitskontakt (19, 20) zur Überwachung der Drehbewegung der jeweiligen Stellwelle (6, 7) zugeordnet ist.7. Load adjustment device according to at least one of the preceding claims, characterized in that the two control shafts (6, 7) a safety contact (19, 20) for monitoring the rotational movement of the respective control shaft (6, 7) is assigned. 8. Lastverstelleinrichtung nach zumindest einem der vor­angehenden Ansprüche, dadurch gekennzeichnet, daß die Mitnehmerverbindung (8) durch einen sektorförmigen Vor­sprung (24) in der Stirnfläche der einen Stellwelle (7) und einen darüber angeordneten, sektorförmigen Vorsprung (23) in der zugewandten Stirnfläche der anderen Stell­welle (7) gebildet ist.8. Load adjustment device according to at least one of the preceding claims, characterized in that the driver connection (8) by a sector-shaped projection (24) in the end face of an actuating shaft (7) and an arranged sector-shaped projection (23) in the facing end face of the another control shaft (7) is formed. 9. Lastverstelleinrichtung nach zumindest einem der vor­angehenden Ansprüche, dadurch gekennzeichnet, daß jede Rutschkupplung zur Begrenzung der maximal möglichen Rela­tivbewegung einen radial durch die jeweilige Stellwelle geführten Stift (25) und zwei Anschlagsegmente (26, 27) am jeweiligen Zahnrad (13b) aufweist.9. Load adjustment device according to at least one of the preceding claims, characterized in that each slip clutch to limit the maximum possible relative movement has a radially guided by the respective control shaft pin (25) and two stop segments (26, 27) on the respective gear (13b). 10. Lastverstelleinrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Stellmotoren (17, 18) ohne Zwischenschaltung eines Getriebes unmittelbar auf den Stellwellen (6, 7) der Drosselklappen (4, 5) angeordnet sind.10. Load adjustment device according to claims 1 or 2, characterized in that the servomotors (17, 18) are arranged directly on the actuating shafts (6, 7) of the throttle valves (4, 5) without the interposition of a gear. 11. Lastverstelleinrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die Stellwellen (6, 7) parallel zueinander verlaufen und daß zur Bildung der Mitnehmer­verbindung (8) auf jeder Stellwelle (6, 7) in radialer Ausrichtung ein Stellsegment (29, 30) mit einem kreis­bogenförmigen Langloch (31, 32) angeordnet ist, in welches eine die Stellsegmente (29, 30) miteinander ver­bindende Koppelstange (33) eingreift.11. Load adjustment device according to claim 10, characterized in that the adjusting shafts (6, 7) run parallel to one another and that to form the driver connection (8) on each adjusting shaft (6, 7) in radial alignment, an adjusting segment (29, 30) with a An arcuate elongated hole (31, 32) is arranged, in which a coupling rod (33) which connects the adjusting segments (29, 30) engages.
EP89110065A 1989-03-23 1989-06-03 Load control apparatus Expired - Lifetime EP0388505B1 (en)

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DE3909570 1989-03-23
DE3909570A DE3909570A1 (en) 1989-03-23 1989-03-23 LOAD ADJUSTMENT DEVICE

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EP0388505A2 true EP0388505A2 (en) 1990-09-26
EP0388505A3 EP0388505A3 (en) 1990-10-24
EP0388505B1 EP0388505B1 (en) 1993-11-03

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FR2900455A1 (en) * 2006-04-26 2007-11-02 Valeo Sys Controle Moteur Sas TWO BUTTERFLY VALVE ACTUATED BY A COMMON ENGINE
WO2007125204A1 (en) * 2006-04-26 2007-11-08 Valeo Systemes De Controle Moteur Air intake device for a heat engine with a cooled main circulation system and a bypass system equipped with a heating mechanism
WO2007125205A1 (en) * 2006-04-26 2007-11-08 Valeo Systemes De Controle Moteur Dual butterfly valve driven by a common drive motor
WO2007129172A2 (en) * 2006-04-26 2007-11-15 Valeo Systemes De Controle Moteur A two-shutter valve
WO2007129172A3 (en) * 2006-04-26 2008-12-04 Valeo Sys Controle Moteur Sas A two-shutter valve
US7992589B2 (en) 2006-04-26 2011-08-09 Valeo Systemes De Controle Moteur Dual butterfly valve driven by a common drive motor
US8074628B2 (en) 2006-04-26 2011-12-13 Valeo Systemes De Controle Moteur Air intake device for a heat engine with a cooled main circulation system and a bypass system equipped with a heating mechanism
CN101432509B (en) * 2006-04-26 2012-06-06 法雷奥电机控制系统公司 Valve of air intake device for a heat engine
US8684033B2 (en) 2006-04-26 2014-04-01 Valeo Systemes De Controle Moteur Two-shutter valve

Also Published As

Publication number Publication date
US5036816A (en) 1991-08-06
DE3909570A1 (en) 1990-09-27
EP0388505B1 (en) 1993-11-03
JPH02259247A (en) 1990-10-22
EP0388505A3 (en) 1990-10-24
DE58906114D1 (en) 1993-12-09

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