EP0370908A1 - Control device of a throttle valve in the fuel supply installation of an internal-combustion engine - Google Patents

Control device of a throttle valve in the fuel supply installation of an internal-combustion engine Download PDF

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Publication number
EP0370908A1
EP0370908A1 EP89403232A EP89403232A EP0370908A1 EP 0370908 A1 EP0370908 A1 EP 0370908A1 EP 89403232 A EP89403232 A EP 89403232A EP 89403232 A EP89403232 A EP 89403232A EP 0370908 A1 EP0370908 A1 EP 0370908A1
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EP
European Patent Office
Prior art keywords
throttle
actuator
actuated
driver
throttle member
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
EP89403232A
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German (de)
French (fr)
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EP0370908B1 (en
Inventor
Philippe Wallerand
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Solex SA
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Solex SA
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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
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F02D31/004—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle stop
    • 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

Definitions

  • the invention relates to fuel supply installations for internal combustion engines and, more particularly, to a device for controlling the throttle member of the intake duct for such an installation, with carburetion or especially with injection.
  • the tendency is to replace the control devices with mechanical connection between the throttling member (or throttle valve) and the control pedal by an electrical connection.
  • Devices of the type are known in particular comprising: a first electrical sensor (generally a potentiometer) for copying the position of a member actuated by the driver, an electrical actuator and a second electrical sensor linked to the throttling member; and an electric actuator supply circuit, receiving the output signals from the sensors and designed to give the throttle member a position which is a function of that of the member actuated by the conductor.
  • the replacement of a direct mechanical link with an electrical circuit has the advantage of authorizing corrections in a simple manner which depend on various operating parameters of the engine, for example its speed and / or its temperature.
  • the invention aims to provide a control device of the above defined type which better meets those previously known than the requirements of practice, in particular in that it eliminates the above defect while requiring only the implementation. simple means.
  • the device comprises a movable stop for limiting the movement of the throttle member in the direction of opening, connected to the member actuated by the driver by mechanical means.
  • the unidirectional link thus formed prevents the throttle valve from opening substantially beyond the position fixed by the driver and transmitted by the first sensor.
  • GB-A-2 072 753 a throttle control device for carburetor which incorporates a movable stop.
  • this stop is not intended to limit the movement of the throttling member in the direction of opening, but to limit this movement in the direction of closing.
  • the throttle body is not controlled by an actuator connected to sensors by an electrical circuit.
  • the device according to patent GB-A-2 072 753 is not intended to achieve the result sought by the invention and mentioned above and would not allow this result to be achieved.
  • the electric actuator can move the throttle member only within a limited range, chosen to correspond to the clearance necessary for regulating the idle speed as a function of the engine load, and to forced partial opening during start-up and cold running when the device has no other circuits involved in these situations.
  • the movable stop of the device according to the invention allows the complete opening of the throttle member.
  • FIG. 1 shows an intake duct 10 formed in a body 12 which may be the body of a carburetor.
  • a throttling member 14 constituted by a butterfly fixed on an axis 16 which passes through the duct.
  • this axis is driven by an actuator 18, shown in FIG. 2 in the form of a rotary actuator, not visible in FIG. 1, and it drives the cursor 20 of a position sensor.
  • the position of the throttle member 14 is controlled by displacement of an accelerator pedal 23, which drives the movable member of an electrical position sensor.
  • this sensor is constituted by a potentiometer 24.
  • the cursor 26 of this potentiometer is secured to a finger 28 mounted so as to be able to rotate around the axis 16, driven by the pedal 23 by a cable linkage 30 of conventional type.
  • the potentiometer could however be in another location, for example directly on the axis of rotation of the pedal 23.
  • Elastic return means tend to bring the accelerator pedal 23 to a rest position reached when the pedal is not subjected to the action of the driver.
  • These elastic means comprise, in the illustrated embodiment, at least one spring 31 stretched between the finger 28 and a fixed anchor point whose action is represented by the arrow F1 in Figure 2. It is preferable to provide two springs placed in parallel, to prevent a spring break resulting in the coming of the accelerator pedal in a position causing the opening from the throttle 14
  • an adjustable stop 32 formed in Figure 1 by a support screw, can be provided.
  • the screw 32 shown is mounted in a projection of the tube and cooperates with a lug 34 belonging to a finger 36 secured to the axis 16 and having another role which will appear later.
  • the output signal from the potentiometer 24 for copying the position of the accelerator pedal 23, the action of which is represented in FIG. 2 by the arrow F0, provides a control signal to a calculation circuit 38 which develops, at from this signal (and, possibly, from temperature ⁇ and speed n signals), as well as from a feedback signal from the servo loop supplied by the potentiometer 22, an electrical command applied to the actuator 18.
  • a unidirectional connection is provided between the accelerator pedal 23 and the throttle member 14, in the form of an abutment connection between the fingers 28 and 36.
  • the finger 28 carries a tenon 40 cooperating with a bearing surface 42 provided on the finger 36.
  • the limits of the travel of the finger 28, and therefore of the accelerator pedal 23, are fixed by abutment members. They are constituted, in the case illustrated in Figure 1, by screws 44 and 46 which respectively limit the movement of the finger 28 in the direction of closing and in the direction of opening.
  • the actuator 18 is provided to move the butterfly 14 in the closing direction.
  • the butterfly is biased in the direction of opening by a return spring constituted, in the illustrated embodiment, by a spiral spring 48 interposed between the axis 16 and an anchoring projection 50 on the body 12.
  • the moment exerted by the spring 48 must remain much less than the moment exerted by the spring (s) 31 so that the system moves in the closing direction in the absence of action on the accelerator pedal 23, even if one of the springs 31 is broken.
  • the position of the stops 32 and 44 is such that the electric actuator 18 can slightly vary the position of the throttle member 14, when the accelerator pedal 23 is released, either to adjust the idle speed, in particular by depending on the engine load (for example when an air conditioner is started), or to allow departures in very cold weather (for example down to -40 ° C) which require forced opening of the throttle 14.
  • the abutment pin 40 moves and releases the throttle member 14 which can open under the opposing actions of the actuator 18 and the spring of recall 48 until possibly coming again into contact with the stop lug 40.
  • This opening can be carried out more slowly than in a conventional device using a mechanical linkage, by following a strategy memorized in the computer 38, which may be of a type known per se.
  • the release of the accelerator pedal 23 mechanically forces the throttle valve to return to a low opening position.
  • the simply adjustable stop 32 with minimum opening of the throttle member 14 can be replaced by a movable stop, displaceable by a member sensitive to the temperature of the engine (such as a wax capsule), at speed engine or other parameters.
  • the idle speed regulation function can be ensured, not by the actuator 18, but by a second actuator acting on an air circuit bypassing the throttle valve, shown diagrammatically in FIG. 1 by a channel 52.
  • the additional air necessary for the cold start of the engine can also be supplied by such a channel.
  • the stop 44 fixing the minimum open position of the accelerator pedal 23 can, in some of these cases, be eliminated.
  • the sensors 22 and 24 as well as the actuator 18 can be of different types from those which have been shown and, in particular, be of rectilinear displacement rather than circular.

Abstract

Le dispositif, utilisable notamment pour les moteurs à injection, comprend un premier capteur électrique (24) de recopie de la position d'un organe (23) actionné par le conducteur ; un actionneur électrique (18) et un second capteur électrique (22) liés à l'organe d'étranglement (14) ; et un circuit électrique (38) d'alimentation de l'actionneur, recevant les signaux de sortie des capteurs (24, 22) et réalisé pour donner à l'organe d'étranglement une position qui est fonction de celle de l'organe actionné par le conducteur. Une butée mobile (40) de limitation du mouvement de l'organe d'étranglement dans le sens de l'ouverture est reliée à l'organe (23) actionné par le conducteur par des moyens mécaniques.The device, usable in particular for injection engines, comprises a first electrical sensor (24) for copying the position of a member (23) actuated by the driver; an electric actuator (18) and a second electric sensor (22) connected to the throttle member (14); and an electrical circuit (38) for supplying the actuator, receiving the output signals from the sensors (24, 22) and designed to give the throttle member a position which is a function of that of the actuated member by the driver. A movable stop (40) for limiting the movement of the throttle member in the opening direction is connected to the member (23) actuated by the conductor by mechanical means.

Description

L'invention concerne les installations d'ali­mentation en combustible pour moteurs à combustion interne et, plus particulièrement, un dispositif de commande de l'organe d'étranglement du conduit d'admission pour une telle installation, à carburation ou surtout à injection.The invention relates to fuel supply installations for internal combustion engines and, more particularly, to a device for controlling the throttle member of the intake duct for such an installation, with carburetion or especially with injection.

A l'heure actuelle, la tendance est de remplacer les dispositifs de commande à liaison mécanique entre l'organe d'étranglement (ou papillon des gaz) et la pédale de commande par une liaison électrique. On connaît notamment des dispositifs du type comprenant : un premier capteur électrique (généralement un potentio­mètre) de recopie de la position d'un organe actionné par le conducteur, un actionneur électrique et un second capteur électrique liés à l'organe d'étranglement ; et un circuit électrique d'alimentation de l'actionneur, recevant les signaux de sortie des capteurs et réalisé pour donner à l'organe d'étranglement une position qui est fonction de celle de l'organe actionné par le conducteur.At present, the tendency is to replace the control devices with mechanical connection between the throttling member (or throttle valve) and the control pedal by an electrical connection. Devices of the type are known in particular comprising: a first electrical sensor (generally a potentiometer) for copying the position of a member actuated by the driver, an electrical actuator and a second electrical sensor linked to the throttling member; and an electric actuator supply circuit, receiving the output signals from the sensors and designed to give the throttle member a position which is a function of that of the member actuated by the conductor.

Le remplacement d'une liaison mécanique directe par un circuit électrique a l'avantage d'autoriser de façon simple des corrections qui dépendent de divers paramètres de fonctionnement du moteur, par exemple sa vitesse et/ou sa température. En particulier, il est possible de réguler la position de l'organe d'étrangle­ment lors du fonctionnement au ralenti et d'absorber les à-coups de déplacement de l'organe actionné par le conducteur.The replacement of a direct mechanical link with an electrical circuit has the advantage of authorizing corrections in a simple manner which depend on various operating parameters of the engine, for example its speed and / or its temperature. In particular, it is possible to regulate the position of the throttle member during idling and to absorb the jolts of movement of the member actuated by the driver.

Mais la plupart des dispositifs existants ont un grave défaut : en cas de défaillance de l'actionneur, l'organe d'étranglement risque de rester ouvert alors que la pédale d'accélérateur est relachée.However, most of the existing devices have a serious defect: in the event of an actuator failure, the throttle member may remain open then the accelerator pedal is released.

L'invention vise à fournir un dispositif de commande du type ci-dessus défini répondant mieux que ceux antérieurement connus aux exigences de la pratique, notamment en ce qu'il écarte le défaut ci-dessus tout en n'exigeant que la mise en oeuvre de moyens simples.The invention aims to provide a control device of the above defined type which better meets those previously known than the requirements of practice, in particular in that it eliminates the above defect while requiring only the implementation. simple means.

Pour cela, le dispositif comprend une butée mobile de limitation du mouvement de l'organe d'étran­glement dans le sens de l'ouverture, reliée à l'organe actionné par le conducteur par des moyens mécaniques.For this, the device comprises a movable stop for limiting the movement of the throttle member in the direction of opening, connected to the member actuated by the driver by mechanical means.

La liaison unidirectionnelle ainsi constituée interdit au papillon de s'ouvrir sensiblement au-delà de la position fixée par le conducteur et transmise par le premier capteur.The unidirectional link thus formed prevents the throttle valve from opening substantially beyond the position fixed by the driver and transmitted by the first sensor.

Il faut remarquer qu'on connait déjà (GB-A-­2 072 753) un dispositif de commande d'organe d'étran­glement pour carburateur qui incorpore une butée mobile. Mais cette butée n'est pas prévue pour limiter le mouvement de l'organe d'étranglement dans le sens de l'ouverture, mais pour limiter ce mouvement dans le sens de la fermeture. L'organe d'étranglement n'est pas commandé par un actionneur relié à des capteurs par un circuit électrique. Le dispositif suivant le brevet GB-A-2 072 753 n'est pas prévu pour atteindre le résultat recherché par l'invention et rappelé plus haut et ne permettrait pas d'atteindre ce résultat.Note that there is already known (GB-A-2 072 753) a throttle control device for carburetor which incorporates a movable stop. However, this stop is not intended to limit the movement of the throttling member in the direction of opening, but to limit this movement in the direction of closing. The throttle body is not controlled by an actuator connected to sensors by an electrical circuit. The device according to patent GB-A-2 072 753 is not intended to achieve the result sought by the invention and mentioned above and would not allow this result to be achieved.

Du fait de la sécurité ainsi fournie, il est possible de prévoir un actionneur agissant dans le sens de la fermeture de l'organe d'étranglement contre l'effort d'un ressort antagoniste qui tend à ouvrir le papillon et à l'amener en contact avec la butée mobile. Le moment exercé par ce ressort antagoniste sur le papillon, doit rester toujours inférieur à celui des moyens élastiques de rappel de l'organe actionné par le conducteur vers la position d'ouverture minimum de l'organe d'étranglement. L'effet de l'organe actionné par le conducteur est en conséquence toujours priori­taire dans le sens de la fermeture, ce qui est un élément de sécurité.Due to the security thus provided, it is possible to provide an actuator acting in the direction of closing the throttle member against the force of an opposing spring which tends to open the throttle valve and bring it into contact with the movable stop. The moment exerted by this opposing spring on the butterfly, must always remain less than that of the elastic return means of the member actuated by the driver towards the minimum open position of the throttle member. The effect of the actuated organ by the driver is therefore always a priority in the direction of closing, which is an element of security.

Le choix de ces sens d'action apporte des avantages.
- en cas de panne se traduisant par la dispa­rition du signal électrique de commande de l'actionneur, l'organe d'étranglement n'en suit pas moins la position de la pédale d'accélérateur, permettant ainsi au conducteur de rejoindre une station de dépannage ;
- si une surtension est appliquée à l'actionneur pour une raison quelconque, l'organe d'étranglement se trouve simplement plaqué sur la butée fixant l'ouverture minimale.The choice of these directions of action brings advantages.
- in the event of a breakdown resulting in the disappearance of the electric actuator control signal, the throttle body nevertheless follows the position of the accelerator pedal, thus allowing the driver to reach a troubleshooting;
- if an overvoltage is applied to the actuator for any reason, the throttle member is simply pressed against the stop fixing the minimum opening.

Lorsque l'organe actionné par le conducteur est relâché, l'actionneur électrique ne peut déplacer l'organe d'étranglement que dans une plage restreinte, choisie pour correspondre au débattement nécessaire à la régulation du ralenti en fonction de la charge du mo­teur, et à l'ouverture partielle forcée lors du démarrage et de la marche à froid lorsque le dispositif est démuni d'autres circuits intervenant dans ces situations. Lorsque, au contraire, l'organe actionné par le conducteur est enfoncé complètement, la butée mobile du dispositif suivant l'invention autorise l'ouverture complète de l'organe d'étranglement.When the member actuated by the driver is released, the electric actuator can move the throttle member only within a limited range, chosen to correspond to the clearance necessary for regulating the idle speed as a function of the engine load, and to forced partial opening during start-up and cold running when the device has no other circuits involved in these situations. When, on the contrary, the member actuated by the driver is fully depressed, the movable stop of the device according to the invention allows the complete opening of the throttle member.

L'invention sera mieux comprise à la lecture de la description qui suit d'un mode particulier de réalisation, donné à titre d'exemple non limitatif. La description se réfère aux dessins qui l'accompagnent, dans lesquels :

  • - la Figure 1 est un schéma en élévation et en coupe partielle d'une fraction du conduit d'admission d'un moteur et du dispositif de commande ;
  • - la Figure 2 est un schéma en perspective destiné à montrer la répartition des composants du dispositif, ceux des composants qui sont solidaires de l'organe d'étranglement étant représentés en traits épais.
The invention will be better understood on reading the following description of a particular embodiment, given by way of non-limiting example. The description refers to the accompanying drawings, in which:
  • - Figure 1 is a diagram in elevation and in partial section of a fraction of the intake duct of an engine and the control device;
  • - Figure 2 is a perspective diagram intended to show the distribution of the components of the device, those of the components which are integral with the throttling member being shown in thick lines.

La Figure 1 montre un conduit d'admission 10 ménagé dans un corps 12 qui peut être le corps d'un carburateur. Dans ce conduit d'admission est disposé un organe d'étranglement 14 constitué par un papillon fixé sur un axe 16 qui traverse le conduit. De façon en elle-même connue, cet axe est entraîné par un actionneur 18, représenté sur la Figure 2 sous forme d'un action­neur rotatif, non visible sur la Figure 1, et il entraîne le curseur 20 d'un capteur de position de l'organe d'étranglement 14, représenté sous forme d'un potentiomètre rotatif 22.Figure 1 shows an intake duct 10 formed in a body 12 which may be the body of a carburetor. In this intake duct is arranged a throttling member 14 constituted by a butterfly fixed on an axis 16 which passes through the duct. In a manner known per se, this axis is driven by an actuator 18, shown in FIG. 2 in the form of a rotary actuator, not visible in FIG. 1, and it drives the cursor 20 of a position sensor. the throttling member 14, represented in the form of a rotary potentiometer 22.

La position de l'organe d'étranglement 14 est commandée par déplacement d'une pédale 23 d'accéléra­teur, qui entraîne l'organe mobile d'un capteur électrique de position. Sur les Figures 1 et 2, ce capteur est constitué par un potentiomètre 24. Dans le cas illustré, le curseur 26 de ce potentiomètre est solidaire d'un doigt 28 monté de façon à pouvoir tourner autour de l'axe 16, entraîné par la pédale 23 par une tringlerie à câble 30 de type classique. Le poten­tiomètre pourrait cependant être à un autre emplacement, par exemple directement sur l'axe de rotation de la pédale 23.The position of the throttle member 14 is controlled by displacement of an accelerator pedal 23, which drives the movable member of an electrical position sensor. In FIGS. 1 and 2, this sensor is constituted by a potentiometer 24. In the illustrated case, the cursor 26 of this potentiometer is secured to a finger 28 mounted so as to be able to rotate around the axis 16, driven by the pedal 23 by a cable linkage 30 of conventional type. The potentiometer could however be in another location, for example directly on the axis of rotation of the pedal 23.

Des moyens de rappel élastiques tendent à ramener la pédale d'accélérateur 23 vers une position de repos atteinte lorsque la pédale n'est pas soumise à l'action du conducteur. Ces moyens élastiques compor­tent, dans le mode de réalisation illustré, au moins un ressort 31 tendu entre le doigt 28 et un point d'ancrage fixe dont l'action est représentée par la flèche F1 sur la Figure 2. Il est préférable de prévoir deux ressorts placés en parallèle, pour éviter qu'une rupture de ressort ne se traduise par la venue de la pédale d'accélérateur dans une position provoquant l'ouverture de l'organe d'étranglement 14Elastic return means tend to bring the accelerator pedal 23 to a rest position reached when the pedal is not subjected to the action of the driver. These elastic means comprise, in the illustrated embodiment, at least one spring 31 stretched between the finger 28 and a fixed anchor point whose action is represented by the arrow F1 in Figure 2. It is preferable to provide two springs placed in parallel, to prevent a spring break resulting in the coming of the accelerator pedal in a position causing the opening from the throttle 14

Pour éviter le coincement de l'organe d'étran­glement 14 en position de pleine fermeture, une butée réglable 32, constituée sur la Figure 1 par une vis d'appui, peut être prévue. La vis 32 représentée est montée dans une saillie de la tubulure et coopère avec un ergot 34 appartenant à un doigt 36 solidaire de l'axe 16 et ayant un autre rôle qui apparaîtra plus loin.To avoid jamming of the throttle member 14 in the fully closed position, an adjustable stop 32, formed in Figure 1 by a support screw, can be provided. The screw 32 shown is mounted in a projection of the tube and cooperates with a lug 34 belonging to a finger 36 secured to the axis 16 and having another role which will appear later.

Le signal de sortie du potentiomètre 24 de recopie de la position de la pédale d'accélérateur 23, dont l'action est représentée sur la Figure 2 par la flèche F0, fournit un signal de commande à un circuit de calcul 38 qui élabore, à partir de ce signal (et, éven­tuellement, de signaux de température ϑ et de vitesse n), ainsi que d'un signal de retour de boucle d'asser­vissement fourni par le potentiomètre 22, une commande électrique appliquée à l'actionneur 18.The output signal from the potentiometer 24 for copying the position of the accelerator pedal 23, the action of which is represented in FIG. 2 by the arrow F0, provides a control signal to a calculation circuit 38 which develops, at from this signal (and, possibly, from temperature ϑ and speed n signals), as well as from a feedback signal from the servo loop supplied by the potentiometer 22, an electrical command applied to the actuator 18.

Dans le mode de réalisation de l'invention montré en Figures 1 et 2, une liaison unidirectionnelle est prévue entre la pédale d'accélérateur 23 et l'organe d'étranglement 14, sous forme d'une liaison de butée entre les doigts 28 et 36. Dans ce but, le doigt 28 porte un tenon 40 coopérant avec une surface d'appui 42 prévue sur le doigt 36.In the embodiment of the invention shown in Figures 1 and 2, a unidirectional connection is provided between the accelerator pedal 23 and the throttle member 14, in the form of an abutment connection between the fingers 28 and 36. For this purpose, the finger 28 carries a tenon 40 cooperating with a bearing surface 42 provided on the finger 36.

Les limites du débattement du doigt 28, et donc de la pédale d'accélérateur 23, sont fixées par des organes de butée. Ils sont constitués, dans le cas illustré sur la Figure 1, par des vis 44 et 46 qui limitent respectivement le débattement du doigt 28 dans le sens de la fermeture et dans le sens de l'ouverture.The limits of the travel of the finger 28, and therefore of the accelerator pedal 23, are fixed by abutment members. They are constituted, in the case illustrated in Figure 1, by screws 44 and 46 which respectively limit the movement of the finger 28 in the direction of closing and in the direction of opening.

L'actionneur 18 est prévu pour déplacer le papillon 14 dans le sens de la fermeture. Le papillon est sollicité dans le sens de l'ouverture par un ressort de rappel constitué, dans le mode de réalisation illustré, par un ressort spirale 48 interposé entre l'axe 16 et une saillie d'ancrage 50 sur le corps 12. Le moment exercé par le ressort 48 doit rester largement inférieur au moment exercé par le (ou les) ressort 31 afin que le système se déplace dans le sens de la fermeture en l'absence d'action sur la pédale d'accélérateur 23, même si l'un des ressorts 31 est cassé. La position des butées 32 et 44 est telle que l'actionneur électrique 18 puisse faire varier légère­ment la position de l'organe d'étranglement 14, lorsque la pédale d'accélérateur 23 est relâchée, soit pour régler le régime de ralenti, notamment en fonction de la charge du moteur (par exemple lorsqu'un climatiseur est mis en route), soit pour permettre les départs par grand froid (par exemple jusqu'à -40°C) qui exigent une ouverture forcée de l'organe d'étranglement 14.The actuator 18 is provided to move the butterfly 14 in the closing direction. The butterfly is biased in the direction of opening by a return spring constituted, in the illustrated embodiment, by a spiral spring 48 interposed between the axis 16 and an anchoring projection 50 on the body 12. The moment exerted by the spring 48 must remain much less than the moment exerted by the spring (s) 31 so that the system moves in the closing direction in the absence of action on the accelerator pedal 23, even if one of the springs 31 is broken. The position of the stops 32 and 44 is such that the electric actuator 18 can slightly vary the position of the throttle member 14, when the accelerator pedal 23 is released, either to adjust the idle speed, in particular by depending on the engine load (for example when an air conditioner is started), or to allow departures in very cold weather (for example down to -40 ° C) which require forced opening of the throttle 14.

Lorsqu'on actionne la pédale d'accélérateur 23 légèrement à partir du repos, le tenon de butée 40 se déplace et libère l'organe d'étranglement 14 qui peut s'ouvrir sous les actions antagonistes de l'actionneur 18 et du ressort de rappel 48 jusqu'à venir, éventuel­lement, de nouveau en contact avec l'ergot de butée 40. Cette ouverture peut s'effectuer plus lentement que dans un dispositif classique utilisant une tringlerie méca­nique, en suivant une stratégie mémorisée dans le calculateur 38, qui peut être de type connu en lui-même.When the accelerator pedal 23 is actuated slightly from rest, the abutment pin 40 moves and releases the throttle member 14 which can open under the opposing actions of the actuator 18 and the spring of recall 48 until possibly coming again into contact with the stop lug 40. This opening can be carried out more slowly than in a conventional device using a mechanical linkage, by following a strategy memorized in the computer 38, which may be of a type known per se.

Lors d'une décélération, et notamment lorsque le conducteur souhaite faire agir le moteur en frein, le fait de relâcher la pédale d'accélérateur 23 contraint mécaniquement le papillon à revenir vers une position d'ouverture faible.During deceleration, and in particular when the driver wishes to apply the engine to the brake, the release of the accelerator pedal 23 mechanically forces the throttle valve to return to a low opening position.

L'invention ne se limite pas au mode particulier de réalisation qui vient d'être décrit. De nombreuses variantes sont possibles. Par exemple, la butée simple­ment ajustable 32 d'ouverture minimale de l'organe d'étranglement 14 peut être remplacée par une butée mobile, déplaçable par un organe sensible à la tempé­rature du moteur (tel qu'une capsule à cire), au régime du moteur ou d'autres paramètres. La fonction de régulation du régime de ralenti peut être assurée, non pas par l'actionneur 18, mais par un second actionneur agissant sur un circuit d'air contournant le papillon, schématisé sur la Figure 1 par un canal 52. L'air additionnel nécessaire au départ à froid du moteur peut être lui aussi fourni par un tel canal. La butée 44 fixant la position d'ouverture minimale de la pédale d'accélérateur 23 peut, dans certains de ces cas, être supprimée. Enfin, les capteurs 22 et 24 ainsi que l'actionneur 18 peuvent être de types différents de ceux qui ont été représentés et, en particulier, être à déplacement rectiligne plutot que circulaire.The invention is not limited to the particular embodiment which has just been described. Many variations are possible. For example, the simply adjustable stop 32 with minimum opening of the throttle member 14 can be replaced by a movable stop, displaceable by a member sensitive to the temperature of the engine (such as a wax capsule), at speed engine or other parameters. The idle speed regulation function can be ensured, not by the actuator 18, but by a second actuator acting on an air circuit bypassing the throttle valve, shown diagrammatically in FIG. 1 by a channel 52. The additional air necessary for the cold start of the engine can also be supplied by such a channel. The stop 44 fixing the minimum open position of the accelerator pedal 23 can, in some of these cases, be eliminated. Finally, the sensors 22 and 24 as well as the actuator 18 can be of different types from those which have been shown and, in particular, be of rectilinear displacement rather than circular.

Il doit être entendu que la portée du présent brevet s'étend à de telles variantes, ainsi plus généralement qu'à toutes autres restant dans le cadre des équivalences.It should be understood that the scope of this patent extends to such variants, and more generally than to all others remaining within the framework of equivalences.

Claims (6)

1. Dispositif de commande de l'organe d'étran­glement du conduit d'admission pour installation d'ali­mentation en combustible de moteur à combustion interne, comprenant : un premier capteur électrique (24) de recopie de la position d'un organe (23) actionné par le conducteur ; un actionneur électrique (18) et un second capteur électrique (22) liés à l'organe d'étranglement (14) ; et un circuit électrique (38) d'alimentation de l'actionneur, recevant les signaux de sortie des capteurs (24, 22) et réalisé pour donner à l'organe d'étranglement une position qui est fonction de celle de l'organe actionné par le conducteur, caractérisé par une butée mobile (40) de limitation du mouvement de l'organe d'étranglement dans le sens de l'ouverture, reliée à l'organe (23) actionné par le conducteur par des moyens mécaniques.1. A device for controlling the throttle member of the intake duct for an internal combustion engine fuel supply installation, comprising: a first electrical sensor (24) for copying the position of a member (23 ) operated by the driver; an electric actuator (18) and a second electric sensor (22) connected to the throttle member (14); and an electrical circuit (38) for supplying the actuator, receiving the output signals from the sensors (24, 22) and designed to give the throttle member a position which is a function of that of the actuated member by the conductor, characterized by a movable stop (40) for limiting the movement of the throttle member in the opening direction, connected to the member (23) actuated by the conductor by mechanical means. 2. Dispositif selon la revendication 1, caractérisé en ce que l'actionneur (18) agit dans le sens de la fermeture dudit organe d'étranglement, contre l'effort d'un ressort antagoniste (48) qui tend à ouvrir l'organe d'étranglement et à l'amener en contact avec la butée mobile (40).2. Device according to claim 1, characterized in that the actuator (18) acts in the direction of closing of said throttling member, against the force of an opposing spring (48) which tends to open the member throttle and bring it into contact with the movable stop (40). 3. Dispositif selon la revendication 2, caractérisé en ce que le moment d'ouverture exercé par le ressort antagoniste (48) est toujours inférieur à celui de moyens élastiques (31) de rappel de l'organe actionné par le conducteur vers une position d'ouverture minimum de l'organe d'étranglement (14).3. Device according to claim 2, characterized in that the opening moment exerted by the opposing spring (48) is always less than that of elastic means (31) for returning the member actuated by the driver to a position d minimum opening of the throttle member (14). 4. Dispositif selon la revendication 3, carac­térisé en ce que lesdits moyens élastiques sont reliés à un ensemble rotatif autour de l'axe d'un papillon constituant l'organe d'étranglement et comprenant un doigt (28) portant un tenon (40) constituant la butée mobile et un organe de commande du premier capteur (24).4. Device according to claim 3, characterized in that said elastic means are connected to a rotary assembly around the axis of a butterfly constituting the throttling member and comprising a finger (28) carrying a tenon (40) constituting the movable stop and a control member of the first sensor (24). 5. Dispositif selon l'une quelconque des reven­dications précédentes, caractérisé en ce que les cap­teurs (22, 24) sont constitués par des potentiomètres.5. Device according to any one of the preceding claims, characterized in that the sensors (22, 24) are constituted by potentiometers. 6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la position de repos dudit organe actionné par le conducteur est telle qu'elle laisse à l'actionneur la possibilité de déplacer l'organe d'étranglement dans une plage restreinte, choisie pour correspondre au débatte­ment nécessaire à la régulation du ralenti en fonction de la charge du moteur et à l'ouverture partielle forcée lors du démarrage et de la marche à froid.6. Device according to any one of the preceding claims, characterized in that the rest position of said member actuated by the driver is such that it leaves the actuator the possibility of moving the throttle member within a restricted range , chosen to correspond to the travel required to regulate the idling speed as a function of the engine load and the forced partial opening during starting and cold running.
EP89403232A 1988-11-25 1989-11-22 Control device of a throttle valve in the fuel supply installation of an internal-combustion engine Expired - Lifetime EP0370908B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815446A FR2639679B1 (en) 1988-11-25 1988-11-25 THREAD BODY CONTROL DEVICE FOR FUEL SUPPLY SYSTEM OF INTERNAL COMBUSTION ENGINE
FR8815446 1988-11-25

Publications (2)

Publication Number Publication Date
EP0370908A1 true EP0370908A1 (en) 1990-05-30
EP0370908B1 EP0370908B1 (en) 1994-03-30

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ID=9372266

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Application Number Title Priority Date Filing Date
EP89403232A Expired - Lifetime EP0370908B1 (en) 1988-11-25 1989-11-22 Control device of a throttle valve in the fuel supply installation of an internal-combustion engine

Country Status (7)

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US (1) US4989566A (en)
EP (1) EP0370908B1 (en)
JP (1) JPH02181038A (en)
BR (1) BR8906169A (en)
DE (1) DE68914259T2 (en)
ES (1) ES2051382T3 (en)
FR (1) FR2639679B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1331380A3 (en) * 2002-01-26 2007-05-16 Bayerische Motoren Werke Aktiengesellschaft Positioning device for a throttle valve
NL2006481A (en) * 2010-03-30 2011-10-03 Kwang Yang Motor Co Motorcycle provided with a fuel injection type engine.

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146887A (en) * 1990-07-12 1992-09-15 General Motors Corporation Valve assembly
DE19711408A1 (en) 1997-03-19 1998-10-01 Mannesmann Vdo Ag Load adjustment device
EP0911506A3 (en) * 1997-10-21 2000-12-27 Hitachi, Ltd. Electronically controlled throttle apparatus for an engine
DE10357129A1 (en) * 2003-12-06 2005-01-20 Pierburg Gmbh Flap valve arrangement for length variable air induction passage system has torsion spring installed around shaft of flap to load flap assembly with force acting in opening direction
US7753800B2 (en) * 2004-09-16 2010-07-13 Jtekt Corporation Expandable shaft
US9587565B2 (en) 2011-06-17 2017-03-07 Caterpillar Inc. Valve stop for engine with exhaust gas recirculation
DE102017209458A1 (en) * 2017-06-05 2018-12-06 Siemens Schweiz Ag Actuator with a return spring acting independently of the actuating operation on a control connection
US11486319B2 (en) * 2018-11-27 2022-11-01 Kohler Co. Engine with remote throttle control and manual throttle control

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2072753A (en) * 1980-03-17 1981-10-07 Sibe Electrical control of carburettor throttle stop pneumatic actuators
US4383506A (en) * 1979-12-28 1983-05-17 Hitachi, Ltd. Engine rotation speed control system
US4449499A (en) * 1982-01-21 1984-05-22 Aisan Kogyo Kabushiki Kaisha Fuel injection system
EP0208222A2 (en) * 1985-07-12 1987-01-14 VDO Adolf Schindling AG Idle speed control device for a spark ignition engine, especially for a motor vehicle
EP0250220A2 (en) * 1986-06-20 1987-12-23 LUCAS INDUSTRIES public limited company Throttle body control arrangement
WO1988002064A1 (en) * 1986-09-13 1988-03-24 Robert Bosch Gmbh System for regulated dosing of combustion air into an internal combustion engine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210237A (en) * 1985-03-15 1986-09-18 Nissan Motor Co Ltd Accel control device for internal-combustion engine for vehicle
JPS61279743A (en) * 1985-06-04 1986-12-10 Nissan Motor Co Ltd Accelerator control device for vehicles
JPS623193A (en) * 1985-06-28 1987-01-09 Hitachi Ltd Rotary compressor
JP2606824B2 (en) * 1986-06-06 1997-05-07 本田技研工業株式会社 Throttle valve control system for vehicle internal combustion engine
JPH0762450B2 (en) * 1986-06-26 1995-07-05 トヨタ自動車株式会社 Slot valve control device for internal combustion engine
JPS6314032A (en) * 1986-07-02 1988-01-21 Mitsubishi Electric Corp Control device for air conditioner
JPS63113738U (en) * 1987-01-19 1988-07-22
JPH086611B2 (en) * 1987-03-26 1996-01-29 日産自動車株式会社 In-vehicle engine control device
KR920002454B1 (en) * 1987-07-22 1992-03-24 미쯔비시 덴끼 가부시끼가이샤 Throttle valve control apparatus
US4831985A (en) * 1988-02-17 1989-05-23 Mabee Brian D Throttle control system
JPH01237330A (en) * 1988-03-14 1989-09-21 Honda Motor Co Ltd Throttle valve driving device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383506A (en) * 1979-12-28 1983-05-17 Hitachi, Ltd. Engine rotation speed control system
US4455978A (en) * 1979-12-28 1984-06-26 Hitachi, Ltd. Engine rotation speed control system
GB2072753A (en) * 1980-03-17 1981-10-07 Sibe Electrical control of carburettor throttle stop pneumatic actuators
US4449499A (en) * 1982-01-21 1984-05-22 Aisan Kogyo Kabushiki Kaisha Fuel injection system
EP0208222A2 (en) * 1985-07-12 1987-01-14 VDO Adolf Schindling AG Idle speed control device for a spark ignition engine, especially for a motor vehicle
EP0250220A2 (en) * 1986-06-20 1987-12-23 LUCAS INDUSTRIES public limited company Throttle body control arrangement
WO1988002064A1 (en) * 1986-09-13 1988-03-24 Robert Bosch Gmbh System for regulated dosing of combustion air into an internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1331380A3 (en) * 2002-01-26 2007-05-16 Bayerische Motoren Werke Aktiengesellschaft Positioning device for a throttle valve
NL2006481A (en) * 2010-03-30 2011-10-03 Kwang Yang Motor Co Motorcycle provided with a fuel injection type engine.

Also Published As

Publication number Publication date
DE68914259D1 (en) 1994-05-05
JPH02181038A (en) 1990-07-13
US4989566A (en) 1991-02-05
EP0370908B1 (en) 1994-03-30
ES2051382T3 (en) 1994-06-16
FR2639679A1 (en) 1990-06-01
FR2639679B1 (en) 1994-02-11
BR8906169A (en) 1990-06-26
DE68914259T2 (en) 1994-08-25

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