EP0338329A2 - Throttle valve positioning device for a mixture preparing device for internal combustion engine - Google Patents

Throttle valve positioning device for a mixture preparing device for internal combustion engine Download PDF

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Publication number
EP0338329A2
EP0338329A2 EP89106020A EP89106020A EP0338329A2 EP 0338329 A2 EP0338329 A2 EP 0338329A2 EP 89106020 A EP89106020 A EP 89106020A EP 89106020 A EP89106020 A EP 89106020A EP 0338329 A2 EP0338329 A2 EP 0338329A2
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EP
European Patent Office
Prior art keywords
rod
throttle valve
internal combustion
end part
membrane
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Application number
EP89106020A
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German (de)
French (fr)
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EP0338329B1 (en
EP0338329A3 (en
Inventor
Günter Härtel
Walter Schauer
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Pierburg GmbH
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Pierburg GmbH
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    • 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
    • F02D11/08—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 pneumatic type

Definitions

  • the invention relates to an adjusting device for the throttle valve of a mixture formation device for internal combustion engines.
  • Throttle valve actuations by means of throttle cable devices are known which act directly on a throttle lever.
  • the accelerator pedal act on a potentiometer, the resistance value of which is evaluated as a measure of a desired throttle position.
  • Devices are known in which an adjustment of the throttle valve is brought about by appropriate pressurization of a vacuum box.
  • the object of the invention is to equip the device formed from the known prior art with a safety device which at least permits the throttle valve to be closed in the event of a malfunction.
  • the drawing shows an adjusting device 1 according to the invention, formed from a housing 3 which can be fastened to the internal combustion engine or to a throttle valve part 2 and which is divided by two membranes 4, 5 into three mutually sealed chambers 6, 7, 8, the outer chambers 6, 8 are ventilated from the atmosphere and the inner chamber 7 can be acted upon via a connecting line 9 and a 2/3 directional valve 1o with the pressure of a vacuum accumulator 11, which is emptied by the intake pressure of the internal combustion engine.
  • the throttle valve part 2 has an intake duct 12 and a throttle valve 14 which can be pivoted by a lever 13.
  • the lever 13 is connected to the membrane 4 via a first membrane rod 15.
  • a throttle cable 16 arranged outside the housing 3 is connected via a shaft 17 mounted in the housing 3 to a pivotable lever 18 in the chamber 8, to which a second rod 19 is attached, which on the other hand, like the other rod 15, is connected to the by means of diaphragm plate 2o Membrane 5 is connected.
  • the membrane rod 19 has a rod part 21 which projects into the chamber 7 and is guided with an end part 22 in an axial recess 23 of the membrane rod 15 connected to the other membrane 4 and the lever 13 of the throttle valve part 2, the axial recess 23 being one less adjustment movement of the end part 22 or the first membrane rod 15 than that of the second membrane rod 19 permits.
  • the end part 22 guided in the recess 23 is designed as a spherical piece and the contact surfaces 24, 25 of the membrane plates 2o existing within the chamber 7 are dome-shaped in order to compensate for the center misalignment of the membrane rods 15, 19.
  • the shaft 17 connected to the throttle cable 16 is connected to a potentiometer 26 which is connected to an electronic control unit via electrical lines (not shown).
  • the resistance value of the potentiometer 26 is evaluated as a measure for a desired throttle valve position, which can be determined as an actual value in accordance with a resistance value of a potentiometer 27 connected to the throttle valve.
  • the throttle cable 16 is connected by a gas cable 28 to an accelerator pedal, not shown.
  • the engine operator actuates the accelerator pedal, as a result of which the throttle cable 16 is placed via the accelerator cable 28 in a position in which the potentiometer 26 has assumed a characteristic resistance value and the diaphragm rod 19 is in a position in which the contact surfaces 24 , 25 the membrane plate 2o is a distance.
  • the resistance value is processed in the control unit to a control signal for the 2/3 way valve, whereby the low pressure existing in the vacuum accumulator 11 can penetrate into the chamber 7 with more or less atmospheric ventilation.
  • the diaphragm rod 15, which is connected to the throttle valve 14 in terms of movement, is hereby adjusted in the direction of the second diaphragm rod 19 until the resistance value of the throttle valve potentiometer 27 corresponds to a desired value formed in the control unit, whereby, if necessary, the contact surfaces 24, 25 of the diaphragm plate 2o can come into contact.
  • the throttle valve 14 closes in that the contact surface 24 of the diaphragm rod 19 connected to the throttle cable 16 comes into contact with the contact surface 25 of the diaphragm rod 15 connected to the throttle valve 14, so that this is also moved in the closing direction of the throttle valve 14.
  • the adjustment takes place without overcoming one of the membrane forces, these cancel each other out.
  • the throttle valve 14 is partially opened by the fact that the end part 22 of the diaphragm rod 19 does not move in the recess 23 can follow more and thereby the membrane rod 15 is carried. This has made it possible for the internal combustion engine to be operated in a partial load range.

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

Abstract

Im Zuge elektronischer Steuerung bzw. Regelung von Brennkraftmaschinen ist es bekannt, die direkte Verstellung der Drosselklappe (14) durch eine indirekte Verstellung zu ersetzen, wobei hierfür Unterdruckdosen bekannt sind.In the course of electronic control or regulation of internal combustion engines, it is known to replace the direct adjustment of the throttle valve (14) by an indirect adjustment, vacuum boxes being known for this.

Hier tritt jedoch der Nachteil auf, daß die Verstellung der Drossel­klappe bei einem Notfall, z.B. bei Ausfall der Elektronik, direkt nicht mehr möglich ist. Hierfür weist die neue Verstelleinrichtung die Merk­male auf, daß die Gaszugscheibe (16) über eine zweite Stange (19) mit einer zweiten Membrane (15) der Unterdruckdose verbunden ist, daß die erste bzw. zweite Stange mit einem Stangenteil (21) in die zwischen den Membranen bestehende Kammer ragt und mit einem Endteil (22) in einer axialen Ausnehmung (23) der zweiten bzw. ersten Stange (15) geführt ist und daß die Ausnehmung in bezug auf axiale Verschieblichkeit des Endteils eine geringere Verstellbewegung des Endteils als die der zweiten Stange zuläßt.Here, however, there is the disadvantage that the throttle valve is adjusted in an emergency, e.g. if the electronics fail, directly is no longer possible. For this purpose, the new adjustment device has the features that the throttle cable (16) is connected via a second rod (19) to a second membrane (15) of the vacuum box, that the first or second rod with a rod part (21) in between the existing membrane protrudes and is guided with an end part (22) in an axial recess (23) of the second or first rod (15) and that the recess with respect to the axial displacement of the end part has a smaller adjustment movement of the end part than that of the second Rod allows.

Bei Ausfall oder Fehlfunktion elektronischer, elektrischer oder mechanischer Bauteile ist eine Vollschließung der Drosselklappe sichergestellt. Bei Einsatz der Brennkraftmaschine in einem Fahrzeug ermöglicht der Notlauf der Brennkraftmaschine in einem Teillastbereich das Weiterfahren zu einer Werkstatt.

Figure imgaf001
In the event of failure or malfunction of electronic, electrical or mechanical components, the throttle valve is fully closed. When the internal combustion engine is used in a vehicle, the emergency operation of the internal combustion engine in a partial load range enables it to continue to a workshop.
Figure imgaf001

Description

Die Erfindung betrifft eine Verstelleinrichtung der Drosselklappe einer Gemischbildungseinrichtung für Brennkraftmaschinen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an adjusting device for the throttle valve of a mixture formation device for internal combustion engines.

Es sind Drosselklappenbetätigungen mittels Gaszugeinrichtungen bekannt, die direkt auf einen Drosselhebel einwirken.
Bei elektronischer Steuerung bzw. Regelung von Brennkraftmaschinen ist es bekannt, das Gaspedal auf ein Potentiometer einwirken zu lassen, dessen Widerstandswert als Maß für eine gewünschte Drosselstellung gewertet wird. Es sind Einrichtungen bekannt, bei denen eine Einstellung der Drosselklappe durch eine entsprechende Druckbeaufschlagung einer Unterdruckdose bewirkt wird.Throttle valve actuations by means of throttle cable devices are known which act directly on a throttle lever.
In electronic control or regulation of internal combustion engines, it is known to have the accelerator pedal act on a potentiometer, the resistance value of which is evaluated as a measure of a desired throttle position. Devices are known in which an adjustment of the throttle valve is brought about by appropriate pressurization of a vacuum box.

Es liegt daher nahe, eine Verstelleinrichtung gemäß Oberbegriff des Patent­anspruchs zu schaffen. Hierbei tritt jedoch der Nachteil auf, daß die Ver­stellung der Drosselklappe nicht direkt mehr kontrolliert werden kann, für den Fall eines Ausfalls der Elektronik.It therefore makes sense to create an adjusting device according to the preamble of the patent claim. However, this has the disadvantage that the adjustment of the throttle valve can no longer be controlled directly in the event of a failure of the electronics.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, die aus dem bekannten Stand der Technik gebildete Einrichtung mit einer Sicherheits­vorrichtung auszustatten, die im Störfall wenigstens die Schließung der Drosselklappe zuläßt.Proceeding from this, the object of the invention is to equip the device formed from the known prior art with a safety device which at least permits the throttle valve to be closed in the event of a malfunction.

Diese Aufgabe ist durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale gelöst, wobei weiterbildende Merkmale in den Unteransprüchen ange­geben sind.This object is achieved by the features specified in the characterizing part of patent claim 1, further-developing features being specified in the subclaims.

Mit der Erfindung erreichbare Vorteile werden anhand der nachfolgenden Be­schreibung eines in der Zeichnung dargestellten Ausführungsbeispiels auf­gezählt.Advantages achievable with the invention are enumerated on the basis of the following description of an exemplary embodiment shown in the drawing.

Die Zeichnung zeigt eine erfindungsgemäße Verstelleinrichtung 1, gebildet aus einem an der Brennkraftmaschine bzw. an einem Drosselklappenteil 2 befestigbaren Gehäuse 3, das durch zwei Membranen 4,5 in drei gegeneinander abgedichtete Kammern 6, 7, 8 aufgeteilt ist, wobei die äußeren Kammern 6, 8 atmosphärisch belüftet sind und die innere Kammer 7 über eine Anschluß­leitung 9 und ein 2/3 Wegeventil 1o mit dem Druck eines Vakuumspeichers 11 beaufschlagbar ist, der durch den Ansaugdruck der Brennkraftmaschine ent­leert wird. Das Drosselklappenteil 2 weist einen Ansaugkanal 12 und eine durch einen Hebel 13 schwenkbare Drosselklappe 14 auf. Der Hebel 13 ist über eine erste Membranstange 15 mit der Membrane 4 verbunden. Eine außerhalb des Gehäuses 3 angeordnete Gaszugscheibe 16 ist über eine im Gehäuse 3 gelagerte Welle 17 mit einem in der Kammer 8 schwenkbaren Hebel 18 verbunden, an den eine zweite Stange 19 angehängt ist, die anderer­seits ebenso wie die andere Stange 15 mittels Membranteller 2o mit der Mem­brane 5 verbunden ist. Die Membranstange 19 weist ein Stangenteil 21 auf, das in die Kammer 7 ragt und mit einem Endteil 22 in einer axialen Aus­nehmung 23 der mit der anderen Membrane 4 und dem Hebel 13 des Drosselklap­penteils 2 verbundenen Membranstange 15 geführt ist, wobei die axiale Aus­nehmung 23 eine geringere Verstellbewegung des Endteils 22 bzw. der ersten Membranstange 15 als die der zweiten Membranstange 19 zuläßt.The drawing shows an adjusting device 1 according to the invention, formed from a housing 3 which can be fastened to the internal combustion engine or to a throttle valve part 2 and which is divided by two membranes 4, 5 into three mutually sealed chambers 6, 7, 8, the outer chambers 6, 8 are ventilated from the atmosphere and the inner chamber 7 can be acted upon via a connecting line 9 and a 2/3 directional valve 1o with the pressure of a vacuum accumulator 11, which is emptied by the intake pressure of the internal combustion engine. The throttle valve part 2 has an intake duct 12 and a throttle valve 14 which can be pivoted by a lever 13. The lever 13 is connected to the membrane 4 via a first membrane rod 15. A throttle cable 16 arranged outside the housing 3 is connected via a shaft 17 mounted in the housing 3 to a pivotable lever 18 in the chamber 8, to which a second rod 19 is attached, which on the other hand, like the other rod 15, is connected to the by means of diaphragm plate 2o Membrane 5 is connected. The membrane rod 19 has a rod part 21 which projects into the chamber 7 and is guided with an end part 22 in an axial recess 23 of the membrane rod 15 connected to the other membrane 4 and the lever 13 of the throttle valve part 2, the axial recess 23 being one less adjustment movement of the end part 22 or the first membrane rod 15 than that of the second membrane rod 19 permits.

Das in der Ausnehmung 23 geführte Endteil 22 ist als Kugelstück ausgeführt und die innerhalb der Kammer 7 bestehenden Kontaktflächen 24,25 der Membran­teller 2o sind kalottenförmig ausgebildet, um Mittenversatz der Membran­stangen 15,19 auszugleichen.The end part 22 guided in the recess 23 is designed as a spherical piece and the contact surfaces 24, 25 of the membrane plates 2o existing within the chamber 7 are dome-shaped in order to compensate for the center misalignment of the membrane rods 15, 19.

Die mit der Gaszugscheibe 16 verbundene Welle 17 ist mit einem Potentiometer 26 verbunden, der über nicht dargestellte elektrische Leitungen mit einem elektronischen Steuergerät verbunden ist. Der Widerstandswert des Potentio­meters 26 wird als Maß für eine gewünschte Drosselklappenstellung gewertet, die entsprechend eines Widerstandswertes eines mit der Drosselklappe ver­bundenen Potentiometers 27 als Istwert festgestellt werden kann. Die Gaszugscheibe 16 ist durch einen Gaszug 28 mit einem nicht dargestellten Gaspedal verbunden.The shaft 17 connected to the throttle cable 16 is connected to a potentiometer 26 which is connected to an electronic control unit via electrical lines (not shown). The resistance value of the potentiometer 26 is evaluated as a measure for a desired throttle valve position, which can be determined as an actual value in accordance with a resistance value of a potentiometer 27 connected to the throttle valve. The throttle cable 16 is connected by a gas cable 28 to an accelerator pedal, not shown.

Funktionfunction

Zur Einstellung einer bestimmten Motorlast betätigt der Motorbetreiber das Gaspedal, wodurch die Gaszugscheibe 16 über den Gaszug 28 in eine Position gestellt ist, bei der das Potentiometer 26 einen charakteri­stischen Widerstandswert eingenommen hat und die Membranstange 19 in einer Position steht, bei der zwischen den Kontaktflächen 24, 25 der Membranteller 2o ein Abstand besteht.To set a specific engine load, the engine operator actuates the accelerator pedal, as a result of which the throttle cable 16 is placed via the accelerator cable 28 in a position in which the potentiometer 26 has assumed a characteristic resistance value and the diaphragm rod 19 is in a position in which the contact surfaces 24 , 25 the membrane plate 2o is a distance.

Der Widerstandswert wird in dem Steuergerät zu einem Steuersignal für das 2/3-Wegeventil verarbeitet, wodurch der im Vakuumspeicher 11 be­stehende niedrige Druck mehr oder weniger atmosphärisch belüftet in die Kammer 7 durchschlagen kann. Die mit der Drosselklappe 14 bewegungs­mäßig verbundene Membranstange 15 wird hierdurch in Richtung auf die zweite Membranstange 19 verstellt, bis der Widerstandswert des Drossel­klappenpotentiometers 27 einem im Steuergerät gebildeten Sollwert ent­spricht, wobei ggfs. auch die Kontaktflächen 24, 25 der Membranteller 2o in Kontakt kommen können.The resistance value is processed in the control unit to a control signal for the 2/3 way valve, whereby the low pressure existing in the vacuum accumulator 11 can penetrate into the chamber 7 with more or less atmospheric ventilation. The diaphragm rod 15, which is connected to the throttle valve 14 in terms of movement, is hereby adjusted in the direction of the second diaphragm rod 19 until the resistance value of the throttle valve potentiometer 27 corresponds to a desired value formed in the control unit, whereby, if necessary, the contact surfaces 24, 25 of the diaphragm plate 2o can come into contact.

Für den Fall einer Störung in der Signalbildung oder mechanischer Bauteile, erfolgt eine Schließung der Drosselklappe 14 dadurch, daß die Kontaktfläche 24 der mit der Gaszugscheibe 16 verbundenen Membranstange 19 gegen die Kontaktfläche 25 der mit der Drosselklappe 14 verbundenen Membranstange 15 in Kontakt gelangt, so daß diese ebenfalls in Schließrichtung der Drossel­klappe 14 bewegt wird. Die Verstellung erfolgt ohne Überwindung einer der Membrankräfte, diese heben sich gegenseitig auf.In the event of a malfunction in the signal formation or mechanical components, the throttle valve 14 closes in that the contact surface 24 of the diaphragm rod 19 connected to the throttle cable 16 comes into contact with the contact surface 25 of the diaphragm rod 15 connected to the throttle valve 14, so that this is also moved in the closing direction of the throttle valve 14. The adjustment takes place without overcoming one of the membrane forces, these cancel each other out.

Sofern in der Kammer 7 ein niedriger Druck durch Ausfall des 2/3-Wegeven­tils 1o oder Undichtheit der Membranen 4,5 nicht mehr erreichbar ist, er­folgt eine Teilöffnung der Drosselklappe 14 dadurch, daß das Endteil 22 der Membranstange 19 in der Ausnehmung 23 bewegungsmäßig nicht mehr folgen kann und dadurch die Membranstange 15 mitgeführt wird. Hierdurch ist es möglich geworden, daß die Brennkraftmaschine in einem Teillastbereich be­trieben werden kann.If a low pressure can no longer be reached in chamber 7 due to failure of the 2/3 directional valve 10 or leakage of the diaphragms 4, 5, the throttle valve 14 is partially opened by the fact that the end part 22 of the diaphragm rod 19 does not move in the recess 23 can follow more and thereby the membrane rod 15 is carried. This has made it possible for the internal combustion engine to be operated in a partial load range.

Mit der Erfindung ist eine indirekte Verstellung der Drosselklappe durch Gaspedal - Sollwertvorgabe und Auswertung des Potentiometer - Widerstands­wertes zur Bildung von Steuersignalen zur Druckbeaufschlagung der Arbeits­kammer mit dem Ansaugdruck der Brennkraftmaschine oder gespeichertem nie­drigerem Druck als atmosphärisch möglich geworden.With the invention, an indirect adjustment of the throttle valve by accelerator pedal setpoint specification and evaluation of the potentiometer resistance value to form control signals for pressurizing the working chamber with the intake pressure of the internal combustion engine or stored lower pressure than atmospheric has become possible.

Bei Ausfall oder Fehlfunktion elektronischer, elektrischer oder mechanischer Bauteile ist eine Vollschließung der Drosselklappe 14 sichergestellt. Bei Einsatz der Brennkraftmaschine in einem Fahrzeug ermöglicht der Notlauf der Brennkraftmaschine in einem Teillastbereich das Weiterfahren zu einer Werk­statt.In the event of failure or malfunction of electronic, electrical or mechanical components, full closure of the throttle valve 14 is ensured. When the internal combustion engine is used in a vehicle, the emergency operation of the internal combustion engine in a partial load range enables it to continue to a workshop.

Claims (5)

1. Verstelleinrichtung der Drosselklappe einer Gemischbildungseinrichtung für Brennkraftmaschinen, bestehend aus einer Gaszugeinrichtung, deren Gaszugscheibe mit einem Potentiometer verbunden ist, dessen Widerstands­wert als Maß einer gewünschten Drosselklappenstellung gewertet wird und eine entsprechende Druckbeaufschlagung einer Unterdruckdose bewirkt, deren mit einer Membrane verbundene erste Stange an einen Drosselklappen­hebel angreift, dadurch gekennzeichnet, daß die Gaszugscheibe (16) über eine zweite Stange (19) mit einer zweiten Membrane (5) der Unterdruckdose verbunden ist,
daß die erste bzw. zweite Stange (15 bzw. 19) mit einem Stangenteil (21) in die zwischen den Membranen (4,5) bestehende Kammer (7) ragt und mit einem Endteil (22) in einer axialen Ausnehmung (23) der zweiten bzw. ersten Stange (19 bzw. 15) geführt ist und daß die Ausnehmung (23) in bezug auf axiale Verschieblichkeit des Endteils (22) eine geringere Verstellbewegung des Endteils (22) als die der zweiten Stange (19) zuläßt.1.Adjustment device of the throttle valve of a mixture formation device for internal combustion engines, consisting of a throttle cable device, the throttle cable of which is connected to a potentiometer, the resistance value of which is evaluated as a measure of a desired throttle valve position and brings about a corresponding pressurization of a vacuum socket, the first rod of which is connected to a diaphragm and connected to a throttle valve lever attacks, characterized in that the throttle cable (16) is connected via a second rod (19) to a second membrane (5) of the vacuum box,
that the first or second rod (15 or 19) with a rod part (21) into the existing between the membranes (4,5) existing chamber (7) and with an end part (22) in an axial recess (23) second or first rod (19 or 15) and that the recess (23) with respect to the axial displacement of the end part (22) allows a smaller adjustment movement of the end part (22) than that of the second rod (19). 2. Verstelleinrichtung nach Anspruch 1 dadurch gekennzeichnet, daß die Anschlag­flächen (24,25) der beiden Stangen (15,19) bzw. der mit diesen verbundenen Membranteller (2o) ein kalottenförmiges Taumellager bilden.2. Adjusting device according to claim 1, characterized in that the stop surfaces (24, 25) of the two rods (15, 19) or the membrane plate (2o) connected to them form a spherical swash bearing. 3. Verstelleinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Endteil (22) des Stangenteils (21) der ersten bzw. zweiten Membranstange (15,19) als Kugelstück ausgeführt ist.3. Adjusting device according to claim 1 or 2, characterized in that the end part (22) of the rod part (21) of the first or second membrane rod (15,19) is designed as a ball piece. 4. Verstelleinrichtung nach einem der vorstehenden Ansprüche, dadurch ge­kennzeichnet, daß die außerhalb eines die Unterdruckdose bildenden Gehäuses (3) angeordnete Gaszugscheibe (16) über eine im Gehäuse ge­lagerte Welle (17) mit einem Hebel (18) verbunden ist, an den die erste Membranstange (15) angehängt ist.4. Adjusting device according to one of the preceding claims, characterized in that the gas draw disc (16) arranged outside a housing forming the vacuum box (3) is connected via a shaft (17) mounted in the housing to a lever (18) to which the first Membrane rod (15) is attached. 5. Verstelleinrichtung nach einem der vorstehenden Ansprüche, dadurch ge­kennzeichnet, daß die zwischen den Membranen (4,5) gebildete Arbeits­kammer (7) nach Maßgabe von Steuersignalen eines elektronischen Steuer­geräts über ein 2/3 Wegeventil (1o) mit dem niedrigen Ansaugdruck der Brennkraftmaschine bzw. eines mit diesem beaufschlagten Vakuumspeichers (11) oder mit Atmosphärendruck beaufschlagt wird.5. Adjusting device according to one of the preceding claims, characterized in that the working chamber (7) formed between the membranes (4,5) in accordance with control signals from an electronic control unit via a 2/3 way valve (1o) with the low intake pressure of the internal combustion engine or a vacuum accumulator (11) loaded with this or with atmospheric pressure.
EP89106020A 1988-04-22 1989-04-06 Throttle valve positioning device for a mixture preparing device for internal combustion engine Expired - Lifetime EP0338329B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813530A DE3813530A1 (en) 1988-04-22 1988-04-22 ADJUSTING DEVICE OF THE THROTTLE VALVE OF A MIXING FORMING DEVICE FOR INTERNAL COMBUSTION ENGINES
DE3813530 1988-04-22

Publications (3)

Publication Number Publication Date
EP0338329A2 true EP0338329A2 (en) 1989-10-25
EP0338329A3 EP0338329A3 (en) 1990-05-02
EP0338329B1 EP0338329B1 (en) 1992-01-08

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EP89106020A Expired - Lifetime EP0338329B1 (en) 1988-04-22 1989-04-06 Throttle valve positioning device for a mixture preparing device for internal combustion engine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008063604A1 (en) * 2008-12-18 2010-06-24 Mahle International Gmbh Valve device and internal combustion engine system

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JPS57206739A (en) * 1981-06-12 1982-12-18 Mikuni Kogyo Co Ltd Driving method of throttle valve in ignition internal combustion engine

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DE58900683D1 (en) 1992-02-20
EP0338329B1 (en) 1992-01-08
DE3813530A1 (en) 1989-11-09
EP0338329A3 (en) 1990-05-02

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