EP0389649B1 - Throttle valve - Google Patents

Throttle valve Download PDF

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Publication number
EP0389649B1
EP0389649B1 EP89105378A EP89105378A EP0389649B1 EP 0389649 B1 EP0389649 B1 EP 0389649B1 EP 89105378 A EP89105378 A EP 89105378A EP 89105378 A EP89105378 A EP 89105378A EP 0389649 B1 EP0389649 B1 EP 0389649B1
Authority
EP
European Patent Office
Prior art keywords
throttle valve
servomotor
stop point
closure
stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89105378A
Other languages
German (de)
French (fr)
Other versions
EP0389649A1 (en
Inventor
Josef Büchl
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.)
Audi AG
Original Assignee
Audi AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Priority to DE58907650T priority Critical patent/DE58907650D1/en
Priority to EP89105378A priority patent/EP0389649B1/en
Priority to ES89105378T priority patent/ES2051912T3/en
Priority to JP2054777A priority patent/JP2781048B2/en
Priority to US07/498,341 priority patent/US5018496A/en
Publication of EP0389649A1 publication Critical patent/EP0389649A1/en
Application granted granted Critical
Publication of EP0389649B1 publication Critical patent/EP0389649B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • 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
    • 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
    • F02D2011/101—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 characterised by the means for actuating the throttles
    • F02D2011/103—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 characterised by the means for actuating the throttles at least one throttle being alternatively mechanically linked to the pedal or moved by an electric actuator

Definitions

  • the invention relates to a throttle valve for an internal combustion engine.
  • a known throttle valve is described in DE-A 37 11 779.
  • This known throttle valve is controlled by an actuator between the fully closed position (0 ° position) and the maximum open position, which is specified by a mechanical encoder.
  • the mechanical transmitter specifies the full closed position of the throttle valve, so the safety of a mechanical accelerator pedal is achieved when the possibilities of regulating an electronic accelerator pedal are recognized.
  • a generic throttle valve is known from DE-A 38 10 270, in which the maximum position of a throttle valve controlled by an electric motor is predetermined by the position of the accelerator pedal or by an encoder which is connected to the cruise control system.
  • the motor adjusts the position of the throttle valve directly and positively coupled, it cannot be moved beyond its mechanically predetermined stop into its open position.
  • the object of the invention is to develop such throttle valves so that an idle charge control via the servomotor is possible and operational reliability is ensured even in the event of a failure of the electric motor and an operationally appropriate emergency setting of the idle speed is possible.
  • a stop actuator is provided which, even when the accelerator pedal is not actuated and the corresponding setpoint value is provided, ensures that the stop point of the throttle valve does not completely close the throttle valve, but rather leaves an angular range of approximately 10 ° available in which the position of the servomotor can be obtained Throttle valve can be regulated.
  • the single figure shows the principle of actuating a throttle valve according to the invention.
  • the reference numeral 10 denotes a throttle valve which is installed in an intake manifold of an internal combustion engine, which in the illustration provided here should run vertically.
  • the throttle valve is shown in the open state, it can be pivoted about a shaft 12, wherein a pivoting in the direction of arrow 100 would bring the throttle valve 10 into its open position.
  • the shaft 12 is bent at one end at an angle to a radial extension 16, which is positively connected in terms of movement to the throttle valve 10, in the continuation of its axis 14 the shaft of an actuating element 18 is provided coaxially, which has a drive lever 22 and an output lever 28.
  • the pivoting of the steep part 18 is set via the drive lever 22, the output lever 28 transmits this pivoting in a manner to be described to the extension 16 which is positively connected in terms of movement to the throttle valve 10.
  • the drive lever 22 or, as shown here, the output lever 28 continues to engage a return spring 24, the other end of which is articulated at point 26 on the motor side, this return spring 24, which is designed as a double spring for safety reasons, acts on the throttle valve 10 in its closed position.
  • the output lever 28 has a driving pin 30 which runs parallel to the axis 14 and is in contact with the extension 16.
  • a stop spring 32 biases the throttle valve 10 into its open position and thus the extension 16 into its contact position with the driver pin 30 of the actuator 18. It is essential that the spring 32 has a smaller spring force characteristic than the return spring 24, that is, it is softer.
  • the spring 32 can connect the extension 16 directly to the output lever, but it can also, as shown in the drawing, exert a torque on the axis 12 with one end and be firmly articulated on the motor side with its other end 80.
  • An extension 50 of the output lever 28 of the actuator 18 has at its end 58 an adjustable stop screw 82 which comes into contact with a stop actuator bolt 56 of a stop actuator 54 and thus limits the pivoting of the actuator 18 in the closed position of the throttle valve 10.
  • the stop actuator 54 can be designed as an electric motor or as a pressure cell.
  • the adjusting lever 18 is rotated in the direction of the open position of the throttle valve 10, that is to say in the direction of rotation of the arrow 100, by a pivoting part 60 which can be pivoted by actuating a cable 20 which is connected to an accelerator pedal, not shown.
  • the shaft 12 of the throttle valve 10 the axis of rotation of the actuating part 18 and the axis of rotation of the pivoting part 60 are aligned coaxially with one another.
  • a counter arm which is designed as an actuating lever 64, can be pivoted about this axis with the aid of a cable lever 62 which is engaged by the cable 20.
  • the actuating lever 64 has a driver 66 which on the one Side of the drive lever 22 of the actuator 18 presses and this actuator 18 thus moves in the direction of the open position.
  • a return spring 70 is provided which ensures that when the accelerator pedal is not actuated and thus when the cable 20 is loose, the pivoting part 60 is moved into its zero position.
  • a setpoint generator 72 which, as a sensor, emits an electrical signal which is representative of the load request as generated by the driver when the accelerator pedal is actuated.
  • the servomotor 42 is controlled by electronics. This can be a slip control, for example.
  • the control electronics also take consumption-optimized characteristics into account, according to which the electric motor can be controlled to open or close the throttle valve. Measures for damping the load change shock when the throttle valve suddenly opens can also be taken into account here.
  • the throttle valve In order to counteract sudden slippage, a load change or also excessive consumption, the throttle valve should be acted on in the direction of its closed position.
  • the electric motor 42 is controlled and it actuates a shaft 40 which rotates in the opposite direction to the arrow 100.
  • a driver 38 comes into abutment with a radial pin 36 and also rotates the shaft 12 in the direction of arrow 100.
  • the extension 16 at the stop point 90 disengages from the driver pin 30 of the actuating element 18, which stresses the spring 32 against its direction of action and the throttle valve around by the electronic Logic predetermined amount closed.
  • An actual value transmitter 68 which determines the actual degree of closure of the throttle valve 10, is assigned to either the shaft 12 or the shaft 40 and provides a value for the actual degree of throttle valve opening.
  • the return spring 24 holds the drive lever 22 and its extension 50 in contact with the point 52, provided that no further resistances prevent this.
  • the pivotal movement of the actuator 18 is transmitted via the driver pin 30 of the actuator 18 to the extension 16 which is connected to the shaft 12 of the throttle valve 10, since the spring 32 presses the extension 16 into contact with the driver pin 30 as long as no further forces Influence throttle valve 10.
  • the maximum opening angle of the throttle valve 10 is predetermined, whereas the throttle valve 10 can close against the arrow direction 100 as long as the closing force overcomes the spring constant of the spring 32.
  • the closing of the throttle valve between the maximum opening degree, which is predetermined by the position of the gas cable 20 and the completely closed position is set by the servomotor 42.
  • the parameters for controlling the motor 42 are determined by correspondingly predetermined parameters stored in memories as well as by vehicle operating parameters (speed, speed, accelerator pedal characteristics and the like) and the values which the transmitters 68 and 72 deliver, namely 68 for the actual position of the throttle valve 10 and 72 for the target position of the throttle valve 10, as is specified via the load request, which is determined by the accelerator pedal.
  • An essential feature of the present invention is the stop actuator 54, which prevents the throttle valve from closing completely due to the mechanical specification. Even if the pivoting part 60 is turned into its full closed position by an accelerator pedal that is not actuated, the abutment screw 82 against the stop actuator bolt 56 prevents the pivoting lever 18 from being reset to 0 ° by the return spring 24; the stop actuator 54 holds the adjusting lever 18 typically in a position that corresponds to an opening angle of approximately 10 ° of the throttle valve 10.
  • the throttle valve is set between 0 and 10 ° solely via the servo motor 42, which is controlled by an idle charge control and thus ensures a constant idle speed.
  • the setpoint generator 72 is not held, but can also assume values between 0 and 10 ° as a typical load requirement, in this area, however, the swivel part 60 does not actuate the control part 18, but the power control of the internal combustion engine takes place solely the setpoint generator 72 and the servomotor 42 instead.
  • the lower value for the opening angle set via the stop plate 54 is selected such that the necessary one There is scope for the idle charge control.
  • the power output of the internal combustion engine can be kept within limits via a further position, whereby on the one hand an emergency operation is possible but on the other hand a dangerous operating state such as sudden uncontrolled acceleration cannot occur.
  • An important area for the application of the invention is the damping of the so-called load change shock. If the accelerator pedal is suddenly depressed, the swivel part 16 and the actuating part 18 are suddenly rotated and the maximum opening angle is thus adjusted upwards, but the servomotor 42 adjusts the actual opening of the throttle valve 10 with a time delay in order to achieve a softer response behavior, which is not noticeable Performance loss increases acceleration comfort.
  • a speed control system can advantageously be connected to the stop actuator 54.
  • the control part 18 is actuated by the cruise control system and specifies the maximum opening angle of the throttle valve 10. Due to the fact that the stop 52 only acts on one side on the drive lever 22, while the drive lever 22 is freely movable to the other side, the pivoting lever 60 is not moved as a result of the pivoting of the actuating part 18 and, accordingly, the accelerator pedal is not pulled. The speed is then set via the servomotor 42.

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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)
  • Feeding And Controlling Fuel (AREA)

Description

Die Erfindung betrifft eine Drosselklappe für eine Brennkraftmaschine.The invention relates to a throttle valve for an internal combustion engine.

Eine bekannte Drosselklappe ist in der DE-A 37 11 779 beschrieben. Diese bekannte Drosselklappe wird über einen Stellmotor zwischen der vollkommen geschlossenen Stellung (0°-Stellung) und der maximalen Öffnungsstellung, die durch einen mechanischen Geber vorgegeben wird, gesteuert. Bei nicht betätigtem Gaspedal gibt der mechanische Geber die vollständige Schließstellung der Drosselklappe vor, es wird also die Sicherheit eines mechanischen Gaspedals bei Wahrnehmung der Möglichkeiten der Regelung eines elektronischen Gaspedals erreicht.A known throttle valve is described in DE-A 37 11 779. This known throttle valve is controlled by an actuator between the fully closed position (0 ° position) and the maximum open position, which is specified by a mechanical encoder. When the accelerator pedal is not actuated, the mechanical transmitter specifies the full closed position of the throttle valve, so the safety of a mechanical accelerator pedal is achieved when the possibilities of regulating an electronic accelerator pedal are recognized.

Weiterhin ist aus der DE-A 38 10 270 eine gattungsgemäße Drosselklappe bekannt, bei der die Maximalstellung einer von einem Elektromotor angesteuerten Drosselklappe vorgegeben wird durch die Stellung des Gaspedals oder durch einen Geber, der mit der Geschwindigkeits-Regelanlage verbunden ist. Bei dieser bekannten Einrichtung stellt der Motor direkt und zwangsgekoppelt die Stellung der Drosselklappe ein, er kann lediglich über den mechanisch vorgegebenen Anschlag nicht hinaus in seine Offenstellung weiterbewegt werden.Furthermore, a generic throttle valve is known from DE-A 38 10 270, in which the maximum position of a throttle valve controlled by an electric motor is predetermined by the position of the accelerator pedal or by an encoder which is connected to the cruise control system. In this known device, the motor adjusts the position of the throttle valve directly and positively coupled, it cannot be moved beyond its mechanically predetermined stop into its open position.

Aufgabe der Erfindung ist es, derartige Drosselklappen weiterzubilden, so daß eine Leerlauf-Füllungsregelung über den Stellmotor möglich wird und auch bei Ausfall des Elektromotors die Betriebssicherheit gewährleistet bleibt und eine betriebsgerechte Notlaufeinstellung des Leerlaufs möglich ist.The object of the invention is to develop such throttle valves so that an idle charge control via the servomotor is possible and operational reliability is ensured even in the event of a failure of the electric motor and an operationally appropriate emergency setting of the idle speed is possible.

Die Aufgabe wird gelöst durch den Hauptanspruch.The task is solved by the main claim.

Erfindungsgemäß ist eine Anschlagsteller vorgesehen, der auch bei nicht betätigtem Gaspedal und entsprechender Sollwertvorgabe Sorge dafür trägt, daß der Anschlagpunkt der Drosselklappe die Drosselklappe nicht vollständig schließt, sondern einen Winkelbereich von etwa 10° zur Verfügung läßt, in dem mit Hilfe des Stellmotors die Stellung der Drosselklappe geregelt werden kann.According to the invention, a stop actuator is provided which, even when the accelerator pedal is not actuated and the corresponding setpoint value is provided, ensures that the stop point of the throttle valve does not completely close the throttle valve, but rather leaves an angular range of approximately 10 ° available in which the position of the servomotor can be obtained Throttle valve can be regulated.

Dadurch wird erreicht, daß über den Stellmotor die Feineinstellung des Leerlaufs vorgenommen werden kann. Darüber hinaus gewährleistet eine derartige Öffnung, daß das Fahrzeug bewegungsfähig bleibt.This ensures that the idle can be fine-tuned using the servomotor. In addition, such an opening ensures that the vehicle remains mobile.

Bevorzugte Ausführungsformen sind in den Unteransprüchen beschrieben.Preferred embodiments are described in the subclaims.

Im folgenden wird die Erfindung anhand der Figur im Detail dargestellt.The invention is illustrated in detail below with reference to the figure.

Die einzige Figur zeigt das Prinzip der Betätigung einer Drosselklappe gemäß der Erfindung.The single figure shows the principle of actuating a throttle valve according to the invention.

In der Figur ist mit dem Bezugszeichen 10 eine Drosselklappe bezeichnet, die in ein Saugrohr einer Brennkraftmaschine eingebaut wird, das in der hier vorgesehenen Darstellung senkrecht verlaufen müßte. Die Drosselklappe ist im geöffneten Zustand dargestellt, sie ist um eine Welle 12 schwenkbar, wobei ein Schwenk in Pfeilrichtung 100 die Drosselklappe 10 in ihre Öffnungsstellung bringen würde.In the figure, the reference numeral 10 denotes a throttle valve which is installed in an intake manifold of an internal combustion engine, which in the illustration provided here should run vertically. The throttle valve is shown in the open state, it can be pivoted about a shaft 12, wherein a pivoting in the direction of arrow 100 would bring the throttle valve 10 into its open position.

Die Welle 12 ist an ihrem einen Ende winkelig zu einem radialen, bewegungsmäßig mit der Drosselklappe 10 zwangsverbundenen Fortsatz 16 abgebogen, in der Fortsetzung ihrer Achse 14 ist die Welle eines Stellteiles 18 koaxial angeordnet vorgesehen, das einen Antriebshebel 22 sowie einen Abtriebshebel 28 aufweist. Über den Antriebshebel 22 wird die Verschwenkung des Steilteiles 18 eingestellt, der Abtriebshebel 28 überträgt diese Verschwenkung in einer noch zu beschreibenden Weise auf den bewegungsmäßig mit der Drosselklappe 10 zwangsverbundenen Fortsatz 16. Am Antriebshebel 22 oder, wie hier dargestellt, am Abtriebshebel 28, greift weiterhin eine Rückholfeder 24 an, deren anderes Ende am Punkt 26 motorseitig angelenkt ist, diese Rückholfeder 24, die aus Sicherheitsgründen als Doppelfeder ausgeführt ist, beaufschlagt die Drosselklappe 10 in ihre Schließstellung.The shaft 12 is bent at one end at an angle to a radial extension 16, which is positively connected in terms of movement to the throttle valve 10, in the continuation of its axis 14 the shaft of an actuating element 18 is provided coaxially, which has a drive lever 22 and an output lever 28. The pivoting of the steep part 18 is set via the drive lever 22, the output lever 28 transmits this pivoting in a manner to be described to the extension 16 which is positively connected in terms of movement to the throttle valve 10. The drive lever 22 or, as shown here, the output lever 28 continues to engage a return spring 24, the other end of which is articulated at point 26 on the motor side, this return spring 24, which is designed as a double spring for safety reasons, acts on the throttle valve 10 in its closed position.

Der Abtriebshebel 28 weist einen parallel zur Achse 14 verlaufenden Mitnehmerstift 30 auf, der mit dem Fortsatz 16 in Berührung steht. Eine Anschlagfeder 32 beaufschlagt unter Vorspannung die Drosselklappe 10 in ihre Öffnungsstellung und somit den Fortsatz 16 in seine Berührungsstellung mit dem Mitnehmerstift 30 des Stellteiles 18. Wesentlich dabei ist, daß die Feder 32 eine kleinere Federkraftkennlinie als die Rückstellfeder 24 besitzt, also weicher ist. Die Feder 32 kann den Fortsatz 16 direkt mit dem Abtriebshebel verbinden, sie kann aber auch, wie zeichnerisch dargestellt, mit ihrem einen Ende ein Drehmoment auf die Achse 12 ausüben und mit ihrem anderen Ende 80 motorseitig fest angelenkt sein.The output lever 28 has a driving pin 30 which runs parallel to the axis 14 and is in contact with the extension 16. A stop spring 32 biases the throttle valve 10 into its open position and thus the extension 16 into its contact position with the driver pin 30 of the actuator 18. It is essential that the spring 32 has a smaller spring force characteristic than the return spring 24, that is, it is softer. The spring 32 can connect the extension 16 directly to the output lever, but it can also, as shown in the drawing, exert a torque on the axis 12 with one end and be firmly articulated on the motor side with its other end 80.

Eine Verlängerung 50 des Abtriebshebels 28 des Stellteils 18 besitzt an ihrem Ende 58 eine verstellbare Anschlagschraube 82, die in Anlage an einen Anschlagstellerbolzen 56 eines Anschlagstellers 54 kommt und somit die Verschwenkung des Stellteiles 18 in Schließstellung der Drosselklappe 10 begrenzt. Der Anschlagsteller 54 kann als Elektromotor oder als Druckdose ausgeführt sein.An extension 50 of the output lever 28 of the actuator 18 has at its end 58 an adjustable stop screw 82 which comes into contact with a stop actuator bolt 56 of a stop actuator 54 and thus limits the pivoting of the actuator 18 in the closed position of the throttle valve 10. The stop actuator 54 can be designed as an electric motor or as a pressure cell.

Der Stellhebel 18 wird in Richtung Öffnungsstellung der Drosselklappe 10, also in der Drehrichtung des Pfeiles 100, durch ein Schwenkteil 60 verdreht, das sich durch Betätigung eines Seilzuges 20, der mit einem nicht dargestellten Gaspedal verbunden ist, verschwenken läßt.The adjusting lever 18 is rotated in the direction of the open position of the throttle valve 10, that is to say in the direction of rotation of the arrow 100, by a pivoting part 60 which can be pivoted by actuating a cable 20 which is connected to an accelerator pedal, not shown.

In der Figur sind die Welle 12 der Drosselklappe 10, die Drehachse des Stellteiles 18 sowie die Drehachse des Schwenkteiles 60 koaxial zueinander ausgerichtet.In the figure, the shaft 12 of the throttle valve 10, the axis of rotation of the actuating part 18 and the axis of rotation of the pivoting part 60 are aligned coaxially with one another.

Um diese Achse läßt sich mit Hilfe eines Seilhebels 62, an dem der Seilzug 20 angreift, ein Gegenarm, der als Stellhebel 64 ausgebildet ist, verschwenken. Der Stellhebel 64 besitzt einen Mitnehmer 66, der auf die eine Seite des Antriebshebels 22 des Stellteiles 18 drückt und dieses Stellteil 18 somit in Richtung Öffnungsstellung bewegt.A counter arm, which is designed as an actuating lever 64, can be pivoted about this axis with the aid of a cable lever 62 which is engaged by the cable 20. The actuating lever 64 has a driver 66 which on the one Side of the drive lever 22 of the actuator 18 presses and this actuator 18 thus moves in the direction of the open position.

Eine Rückholfeder 70 ist vorgesehen, die dafür Sorge trägt, daß bei nicht betätigtem Gaspedal und somit bei lockerem Seilzug 20 das Schwenkteil 60 in seine Nullage bewegt wird.A return spring 70 is provided which ensures that when the accelerator pedal is not actuated and thus when the cable 20 is loose, the pivoting part 60 is moved into its zero position.

Zugeordnet zu dem Schwenkteil 60 ist ein Sollwertgeber 72, der als Sensor auf elektrischem Wege ein Signal abgibt, das repräsentativ ist für die Lastanforderung, wie sie aufgrund der Betätigung des Gaspedales vom Fahrer erzeugt wird.Associated with the swivel part 60 is a setpoint generator 72 which, as a sensor, emits an electrical signal which is representative of the load request as generated by the driver when the accelerator pedal is actuated.

Ein weiterer Eingriff in die Stellung der Drosselklappe 10 ist über den Stellmotor 42 möglich. Der Stellmotor 42 wird angesteuert von einer Elektronik. Dabei kann es sich beispielsweise um eine Schlupfregelung handeln. Die ansteuernde Elektronik berücksichtigt weiterhin verbrauchsoptimierte Kennlinien, gemäß denen der Elektromotor zum Öffnen oder Schließen der Drosselklappe gesteuert werden kann. Auch Maßnahmen zur Dämpfung des Lastwechselschlages beim plötzlichen Öffnen der Drosselklappe können hier berücksichtigt werden.A further intervention in the position of the throttle valve 10 is possible via the servomotor 42. The servomotor 42 is controlled by electronics. This can be a slip control, for example. The control electronics also take consumption-optimized characteristics into account, according to which the electric motor can be controlled to open or close the throttle valve. Measures for damping the load change shock when the throttle valve suddenly opens can also be taken into account here.

Um plötzlichem Schlupf, einem Lastwechselschlag oder auch einem zu hohen Verbrauch entgegenzuwirken, soll die Drosselklappe in Richtung ihrer Schließstellung beaufschlagt werden. Dazu wird der Elektromotor 42 angesteuert und er betätigt eine Welle 40, die sich, entgegen der Richtung des Pfeiles 100, dreht. Somit kommt ein Mitnehmer 38 mit einem radial Zapfen 36 in Anschlag und dreht die Welle 12 ebenfalls in Richtung des Pfeiles 100. Damit kommt der Fortsatz 16 im Anschlagpunkt 90 mit dem Mitnehmerstift 30 des Stellteiles 18 außer Eingriff, die Feder 32 entgegen ihrer Beaufschlagungsrichtung beansprucht und die Drosselklappe um den durch die elektronische Logik vorgegebenen Betrag geschlossen.In order to counteract sudden slippage, a load change or also excessive consumption, the throttle valve should be acted on in the direction of its closed position. For this purpose, the electric motor 42 is controlled and it actuates a shaft 40 which rotates in the opposite direction to the arrow 100. Thus, a driver 38 comes into abutment with a radial pin 36 and also rotates the shaft 12 in the direction of arrow 100. Thus, the extension 16 at the stop point 90 disengages from the driver pin 30 of the actuating element 18, which stresses the spring 32 against its direction of action and the throttle valve around by the electronic Logic predetermined amount closed.

Ein Istwertgeber 68, der den tatsächlichen Schließgrad der Drosselklappe 10 feststellt, ist entweder der Welle 12 oder der Welle 40 zugeordnet und liefert einen Wert für den tatsächlichen Drosselklappenöffnungsgrad.An actual value transmitter 68, which determines the actual degree of closure of the throttle valve 10, is assigned to either the shaft 12 or the shaft 40 and provides a value for the actual degree of throttle valve opening.

Die Funktion der dargestellten Anordnung ist wie folgt:
Durch Zug an dem Gaspedal 20 wird das Schwenkteil 60 um seine Achse gedreht und drückt über den Mitnehmer 66 im Anschlag 52 auf den Antriebshebel 22 des Stellteils 18. Dadurch wird das Stellteil 18 auf der Zeichnung im Uhrzeigersinn verschwenkt, wobei ein Schwenken über das Maß, das durch die Verschwenkung des Schwenkteiles 60 vorbestimmt wird, hinaus durchaus möglich ist, in diesem Falle käme der Antriebshebel 22 im Punkt 52 nicht mehr in Anlage an den Mitnehmer 66 des Schwenkteiles 60.The function of the arrangement shown is as follows:
By pulling the accelerator pedal 20, the swivel part 60 is rotated about its axis and presses via the driver 66 in the stop 52 onto the drive lever 22 of the actuating part 18. As a result, the actuating part 18 is pivoted clockwise in the drawing, with swiveling over the dimension, which is predetermined by the pivoting of the pivoting part 60, is also quite possible, in this case the drive lever 22 would no longer come into contact with the driver 66 of the pivoting part 60 at point 52.

Die Rückstellfeder 24 hält jedoch den Antriebshebel 22 und dessen Verlängerung 50 in Anlage an dem Punkt 52, sofern keine weiteren Widerstände dieses verhindern.The return spring 24, however, holds the drive lever 22 and its extension 50 in contact with the point 52, provided that no further resistances prevent this.

Die Schwenkbewegung des Stellteiles 18 überträgt sich über den Mitnehmerstift 30 des Stellteils 18 auf den Fortsatz 16, der mit der Welle 12 der Drosselklappe 10 verbunden ist, da die Feder 32 den Fortsatz 16 in Anlage an den Mitnehmerstift 30 drückt, solange keine weiteren Kräfte die Drosselklappe 10 beeinflussen. Auf diese Weise wird der maximale Öffnungswinkel der Drosselklappe 10 vorgegeben, wohingegen die Drosselklappe 10 ungehindert sich entgegen der Pfeilrichtung 100 schließen kann, solange die Schließkraft die Federkonstante der Feder 32 überwindet.The pivotal movement of the actuator 18 is transmitted via the driver pin 30 of the actuator 18 to the extension 16 which is connected to the shaft 12 of the throttle valve 10, since the spring 32 presses the extension 16 into contact with the driver pin 30 as long as no further forces Influence throttle valve 10. In this way, the maximum opening angle of the throttle valve 10 is predetermined, whereas the throttle valve 10 can close against the arrow direction 100 as long as the closing force overcomes the spring constant of the spring 32.

Das Schließen der Drosselklappe zwischen dem maximalen Öffnungsgrad, der durch die Stellung des Gasseilzuges 20 vorgegeben wird und der vollkommen geschlossenen Stellung wird eingestellt durch den Stellmotor 42.The closing of the throttle valve between the maximum opening degree, which is predetermined by the position of the gas cable 20 and the completely closed position is set by the servomotor 42.

Die Parameter zur Ansteuerung des Motors 42 werden ermittelt durch entsprechend vorgegebene und in Speichern abgelegte Parameter sowie durch Fahrzeugbetriebsparameter (Geschwindigkeit, Drehzahl, Fahrpedalkennlinien und ähnliches) und die Werte, die die Geber 68 und 72 liefern, und zwar 68 zur Ist-Stellung der Drosselklappe 10 und 72 zur Soll-Stellung der Drosselklappe 10, wie es über die Lastanforderung, die durch das Gaspedal bestimmt wird, vorgegeben ist.The parameters for controlling the motor 42 are determined by correspondingly predetermined parameters stored in memories as well as by vehicle operating parameters (speed, speed, accelerator pedal characteristics and the like) and the values which the transmitters 68 and 72 deliver, namely 68 for the actual position of the throttle valve 10 and 72 for the target position of the throttle valve 10, as is specified via the load request, which is determined by the accelerator pedal.

Ein wesentliches Merkmal der vorliegenden Erfindung ist der Anschlagsteller 54, der ein vollständiges Schließen der Drosselklappe aufgrund der mechanischen Vorgabe verhindert. Auch wenn das Schwenkteil 60 durch ein nicht betätigtes Gaspedal in seine volle Schließstellung gedreht wird, wird durch die Anlage der Anschlagschraube 82 an den Anschlagstellerbolzen 56 ein Zurückstellen des Schwenkhebels 18 durch die Rückstellfeder 24 bis auf 0° verhindert, der Anschlagsteller 54 hält den Stellhebel 18 typischerweise in einer Stellung, die einem Öffnungswinkel von etwa 10° der Drosselklappe 10 entspricht. Die Einstellung der Drosselklappe zwischen 0 und 10° geschieht allein über den Stellmotor 42, der dazu von einer Leerlauffüllungsregelung angesteuert wird und somit für eine konstante Leerlaufdrehzahl sorgt.An essential feature of the present invention is the stop actuator 54, which prevents the throttle valve from closing completely due to the mechanical specification. Even if the pivoting part 60 is turned into its full closed position by an accelerator pedal that is not actuated, the abutment screw 82 against the stop actuator bolt 56 prevents the pivoting lever 18 from being reset to 0 ° by the return spring 24; the stop actuator 54 holds the adjusting lever 18 typically in a position that corresponds to an opening angle of approximately 10 ° of the throttle valve 10. The throttle valve is set between 0 and 10 ° solely via the servo motor 42, which is controlled by an idle charge control and thus ensures a constant idle speed.

Durch die Anordnung mit dem Stellhebel 18 wird andererseits der Sollwertgeber 72 nicht festgehalten, sondern kann auch Werte zwischen 0 und 10° als typische Lastanforderung einnehmen, in diesem Bereich jedoch betätigt das Schwenkteil 60 nicht das Stellteil 18, sondern die Leistungsregelung der Brennkraftmaschine findet allein über den Sollwertgeber 72 und den Stellmotor 42 statt.Due to the arrangement with the control lever 18, on the other hand, the setpoint generator 72 is not held, but can also assume values between 0 and 10 ° as a typical load requirement, in this area, however, the swivel part 60 does not actuate the control part 18, but the power control of the internal combustion engine takes place solely the setpoint generator 72 and the servomotor 42 instead.

Der über den Anschlagsteller 54 eingestellte untere Wert für den Öffnungswinkel ist so gewählt, daß der notwendige Spielraum für die Leerlauffüllungsregelung zur Verfügung steht. Bei einem Defekt kann über eine weitere Stellung die Leistungsabgabe der Brennkraftmaschine in Grenzen gehalten wird, wodurch einerseits zwar ein Notlauf möglich ist, andererseits jedoch ein gefährlicher Betriebszustand, wie plötzliche unkontrollierte Beschleunigung nicht auftreten kann.The lower value for the opening angle set via the stop plate 54 is selected such that the necessary one There is scope for the idle charge control. In the event of a defect, the power output of the internal combustion engine can be kept within limits via a further position, whereby on the one hand an emergency operation is possible but on the other hand a dangerous operating state such as sudden uncontrolled acceleration cannot occur.

Ein wichtiger Bereich für die Anwendung der Erfindung ist die Dämpfung des sogenannten Lastwechselschlages. Bei plötzlichem Niedertreten des Gaspedales wird zwar schlagartig das Schwenkteil 16 und das Stellteil 18 verdreht und somit der maximale Öffnungswinkel nach oben verstellt, der Stellmotor 42 regelt jedoch die tatsächliche Öffnung der Drosselklappe 10 zeitversetzt nach, um somit ein weicheres Ansprechverhalten zu erreichen, das ohne merkbare Leistungseinbuße den Beschleunigungskomfort erhöht.An important area for the application of the invention is the damping of the so-called load change shock. If the accelerator pedal is suddenly depressed, the swivel part 16 and the actuating part 18 are suddenly rotated and the maximum opening angle is thus adjusted upwards, but the servomotor 42 adjusts the actual opening of the throttle valve 10 with a time delay in order to achieve a softer response behavior, which is not noticeable Performance loss increases acceleration comfort.

Umgekehrt kann bei einem plötzlichen Loslassen des Gaspedales die Drosselklappe 10 nicht vollständig geschlossen werden, sondern durch den Anschlagsteller 54 bleibt eine Mindestöffnung von 11° (als Beispielswert) garantiert, so daß auch hier kein abrupter Lastwechselschlag durch vollständiges Wegnehmen der Last auftritt.Conversely, if the accelerator pedal is suddenly released, the throttle valve 10 cannot be closed completely, but the stop actuator 54 guarantees a minimum opening of 11 ° (as an example value), so that here too there is no abrupt load change by completely removing the load.

In vorteilhafter Weise kann eine Geschwindigkeitsregelanlage mit dem Anschlagsteller 54 verbunden werden. In diesem Falle wird das Stellteil 18 durch die Geschwindigkeitsregelanlage betätigt und gibt den maximalen Öffnungswinkel der Drosselklappe 10 vor. Aufgrund der Tatsache, daß der Anschlag 52 nur einseitig auf den Antriebshebel 22 wirkt, während der Antriebshebel 22 nach der anderen Seite frei beweglich ist, wird durch das Verschwenken des Stellteiles 18 der Schwenkhebel 60 nicht mitbewegt und dementsprechend das Gaspedal nicht mitgezogen. Die Einstellung der Geschwindigkeit erfolgt dann über den Stellmotor 42.A speed control system can advantageously be connected to the stop actuator 54. In this case, the control part 18 is actuated by the cruise control system and specifies the maximum opening angle of the throttle valve 10. Due to the fact that the stop 52 only acts on one side on the drive lever 22, while the drive lever 22 is freely movable to the other side, the pivoting lever 60 is not moved as a result of the pivoting of the actuating part 18 and, accordingly, the accelerator pedal is not pulled. The speed is then set via the servomotor 42.

Claims (9)

  1. Throttle valve (10) for an internal combustion engine, having
    a) a shaft (12) on which the throttle valve (10) is mounted, the shaft (12) being connected to a sensor (68) giving the actual position of the throttle valve (10),
    b) a stop point (30) which limits the opening movement of the throttle valve (10) in the direction of opening,
    c) a device for shifting the stop point (30) in the direction of opening in response to the actuation of a mechanical cable (20) via the accelerator pedal, the device incorporating a swivelling part (60) adapted to be actuated by the cable (20) and which adjusts the stop point (30) via a servo part (18),
    d) a sensor (72) activated by the swivelling part (60) to give the nominal value for the position of the throttle valve,
    e) a return device (70, 24) which causes the stop point (30) to move in the direction of closure of the throttle valve (10) when the mechanical cable (20) is slack,
    f) a servomotor (42) which sets the degree of opening of the throttle valve (10) between the closed position and the maximum open position defined by the stop point (30), the servomotor (42) using a driving dog (38) to entrain a pin (36) rigidly coupled to the shaft (12) against the spring force (32) and thus only forcing the throttle valve (10) to move in the direction of closure, and the throttle valve (10) being acted upon by the spring force (32) when the movement of the servomotor (42) is reversed,
    g) a spring force (32) acts upon the throttle valve (10) in the direction of the stop point (30),
    characterised in that
    h) a stop adjuster (54) operates on the servo part (18) and thus sets the minimum position of the stop point (30) in the direction of closure of the throttle valve (10),
    i) free operation is maintained between the stop point (30) in its minimum position in the direction of closure of the throttle valve (10) and the swivelling part (60) in its minimum position in the direction of closure of the throttle valve (10), in order to allow idle filling control by the servomotor (42).
  2. Throttle valve according to claim 1, characterised in that the stop point (30) is a continuation of an output lever (28) of the servo part (18), which specifies the maximum setting of the throttle valve, the continuation (30) pushing on a component (16) forced to move with the throttle valve (10) during closure.
  3. Throttle valve according to claim 1 or 2, characterised in that the stop adjuster is a barometric cell (54) or a servomotor which limits the movement of the servo part (18) in the direction of closure of the throttle valve.
  4. Throttle valve according to any of the preceding claims, characterised in that the servo part (18) can be adjusted by a speed regulator unit.
  5. Throttle valve according to claim 4, characterised in that the speed regulator unit sets the stop adjuster (54).
  6. Throttle valve according to any of the preceding claims, characterised in that the swivelling part (60) can be adjusted to settings between 0° and 90°, the swivelling part (18) to settings between at least 4° and 90°, and the servomotor (42) sets the throttle valve between 0° and the maximum opening position.
  7. Throttle valve according to any of the preceding claims, characterised in that the servomotor (42) is an electric motor which receives signals from an idle filling controller.
  8. Throttle valve according to claim 7, characterised in that the electric motor (42) is controlled by a computer which is programmed to adjust the throttle valve setting angle to take account of the values from the nominal value sensor (72) and the actual value sensor (68).
  9. Throttle valve according to any of the preceding claims, characterised in that the shaft (12) of the throttle valve (10), the axis of the servo part (18) and the rotational axis of the swivelling part (60) are arranged coaxially with one another.
EP89105378A 1989-03-25 1989-03-25 Throttle valve Expired - Lifetime EP0389649B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE58907650T DE58907650D1 (en) 1989-03-25 1989-03-25 Throttle.
EP89105378A EP0389649B1 (en) 1989-03-25 1989-03-25 Throttle valve
ES89105378T ES2051912T3 (en) 1989-03-25 1989-03-25 GAS BUTTERFLY.
JP2054777A JP2781048B2 (en) 1989-03-25 1990-03-06 Throttle valve device
US07/498,341 US5018496A (en) 1989-03-25 1990-03-23 Method and apparatus for throttle valve control in internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89105378A EP0389649B1 (en) 1989-03-25 1989-03-25 Throttle valve

Publications (2)

Publication Number Publication Date
EP0389649A1 EP0389649A1 (en) 1990-10-03
EP0389649B1 true EP0389649B1 (en) 1994-05-11

Family

ID=8201139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105378A Expired - Lifetime EP0389649B1 (en) 1989-03-25 1989-03-25 Throttle valve

Country Status (5)

Country Link
US (1) US5018496A (en)
EP (1) EP0389649B1 (en)
JP (1) JP2781048B2 (en)
DE (1) DE58907650D1 (en)
ES (1) ES2051912T3 (en)

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Also Published As

Publication number Publication date
EP0389649A1 (en) 1990-10-03
ES2051912T3 (en) 1994-07-01
DE58907650D1 (en) 1994-06-16
JPH02275031A (en) 1990-11-09
JP2781048B2 (en) 1998-07-30
US5018496A (en) 1991-05-28

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