EP0031261B1 - Device for automatically controlling the closing of a decompression valve of an internal-combustion engine - Google Patents

Device for automatically controlling the closing of a decompression valve of an internal-combustion engine Download PDF

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Publication number
EP0031261B1
EP0031261B1 EP80401640A EP80401640A EP0031261B1 EP 0031261 B1 EP0031261 B1 EP 0031261B1 EP 80401640 A EP80401640 A EP 80401640A EP 80401640 A EP80401640 A EP 80401640A EP 0031261 B1 EP0031261 B1 EP 0031261B1
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EP
European Patent Office
Prior art keywords
valve
closing
shaft
spring
decompression
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Expired
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EP80401640A
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German (de)
French (fr)
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EP0031261A1 (en
Inventor
Marc Perrin
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Peugeot Cycles SA
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Peugeot Cycles SA
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Publication date
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Priority to AT80401640T priority Critical patent/ATE5345T1/en
Publication of EP0031261A1 publication Critical patent/EP0031261A1/en
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Publication of EP0031261B1 publication Critical patent/EP0031261B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio

Definitions

  • DE-B-1 069932 describes a decompression device intended to facilitate this starting maneuver.
  • This device comprises a cam blocking the valve control, which is immobilized by a pivoting lever driven laterally during the rotation of the engine and released after a determined stroke of this lever. An appropriate adjustment of the valve closure is thus obtained, which takes place only after starting.
  • Such a device is however difficult to adapt to two-wheeled vehicles, or the like, due in particular to its complexity and its relative fragility.
  • the present invention therefore aims to provide an automatic control ensuring the closure of the decompression valve, after a determined number of engine rotation turns, which is simpler and more robust while being extremely precise.
  • the object of this invention is in fact an automatic control device for closing the decompression valve, characterized in that it comprises a finger which, at rest, covers the end of a shaft integral in rotation with the engine and provided of a peripheral helical groove, and is free to tilt laterally under the opposite actions of the decompression control and the closing spring of the decompression valve, and which is also articulated relative to its tilting plane and constantly elastically spread from this plane towards the shaft, so that when the decompression command is requested, it rocks and is applied laterally by the closing spring against the helical groove of the shaft which prevents the closing action of the spring, then is moved axially by the rotation of the helical groove until it returns to the end of the shaft, which allows it to tilt, releases the spring and triggers the closing of the valve.
  • the device for controlling the decompression valve of an internal combustion engine mounted on a moped, or the like comprises a lever 1 which controls a cable 2 and is articulated on the handlebar 4 of the vehicle, near a control handle 5.
  • the valve or more precisely the spring which returns it to the closed position, is connected to a control cable 6.
  • the cylinder head 8 of the engine is pierced with a bore 10 which communicates on the one hand with the combustion chamber 12 and, on the other hand, with a duct 14 for venting.
  • the communication between the bore 10 and the combustion chamber 12 is controlled by a valve 16 secured to a rod 18, which slides in a guide 20 secured to the cylinder head 8.
  • a hairpin spring 22 is mounted between the guide 20 and a lever 24 which is fixed, on the one hand to the end of the rod 18, and on the other hand to the end of the cable 6. As shown in FIG. 1, the spring 22 thus constantly recalls the valve 16 in its closed position.
  • the two control cables 2 and 6 are fixed at the two ends 25 and 27 respectively, of a plate 26 capable of tilting parallel to itself around an axis 28 placed at equal distance from the two points 25 and 27.
  • the plate 26 On one of its faces, the plate 26 carries a yoke crossed by an axis 31, around which a finger 32 is articulated (fig. 2). A spring 24 bears, on the one hand on the plate 26 and, on the other hand, on the finger 32 and tends to separate these two members from one another.
  • this shaft 35 is constituted by an extension of the crankshaft 36 of the engine.
  • This shaft 35 is carried by a fixed bearing 38 and comprises, between this bearing 38 and its end, a helical groove 40 which can for example constitute a screw thread.
  • the pilot presses on the lever 1 and thus pulls the cable 2, it causes a lateral tilting of the plate 26 around the axis 28.
  • the finger 32 is driven in this tilting movement and also pivots around the axis 28. Consequently, the tip 33 of this finger 32 which covered the end of the shaft 35 emerges laterally from this shaft and, as a result, is pushed back by the spring 34 until it contacts the bearing 38, that is to say in fact up to the end of the helical groove 40.
  • the tilting of the plate 26 exerted traction on the cable 6 and thus caused the spring branches 22, c '' i.e. the opening of the valve 16 (fig. 5).
  • the motor automatically performed a determined number of revolutions before the valve 16 closed.
  • An appropriate choice of the number of turns the groove 40 allows the engine to perform, before closing the valve 16, a sufficient number of revolutions for its launch, so that it can then easily start.
  • the clevis 30 for supporting the finger 32 is situated at an intermediate point between the axis 28 of the plate 26 and the point 25 for fixing the cable 2.
  • the tip 33 of finger 32 comes into contact with groove 40 at a point which is also on the same side as point 25 with respect to the plane passing through pivot axis 28 and through axis of shaft 35. All tilting of the plate 26 in the direction of the cable 6 is thus completely prohibited as long as the engine has not performed the desired number of revolutions.
  • the pilot is absolutely sure that the decompression valve will be closed exactly when necessary and he has no particular maneuver to perform, the only command of the lever 1 automatically and successively causing the opening and closing of this valve.
  • control device thus produced is extremely simple while being perfectly safe, which makes it particularly suitable for mopeds or other two-wheeled vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The device comprises a conventional arrangement for opening the decompression valve comprising a manual actuating lever connected to the valve and operative to open the valve in opposition to the action of a return spring which biases the valve to the closing position. A delay device is provided for delaying the return of the valve to the closing position when the actuating lever has been released. The delay device comprises a control member connected to the connection between the actuating lever and the valve and movable substantially in a plane between a first position for opening the valve and a second position for closing the valve. A finger member pivotally mounted on the control member is positioned to engage a helical groove on a shaft rotated by the engine when starting up and is blocked by the shaft until the finger member has travelled to the end of the helical groove and reached the outer extremity of the shaft whereupon it suddenly ceases to be blocked by the shaft and the control member can move to its second position and suddenly close the valve.

Description

Le démarrage des petits moteurs à explosion utilisés par exemple sur les véhicules à deux roues, tels que les cyclomoteurs, est le plus souvent obtenu par l'intermédiaire du pédalier dont est généralement équipé le véhicule. Par suite, c'est la puissance musculaire du pilote qui assure le lancement du moteur. Or, très souvent, et tout particulièrement lorsque le pilote est une femme ou un enfant, cette force n'est pas suffisante pour provoquer 1 9 rotation du moteur.The starting of small internal combustion engines used for example on two-wheeled vehicles, such as mopeds, is most often obtained by means of the pedals with which the vehicle is generally fitted. Consequently, it is the muscular power of the pilot which ensures the launching of the engine. But very often, especially when the driver is a woman or a child, this force is not sufficient to cause September 1 motor rotation.

On a donc équipé la , lupart des moteurs de ce type d'une soupape de décompression qui permet de mettre en communication la chambre de combustion du moteur avec l'atmosphère. On évite ainsi la compression des gaz et les premiers tours de rotation du moteur se font sans difficulté. Il est toutefois nécessaire que cette soupape se referme brusquement dès que la vitesse de rotation est suffisante pour que le moteur puisse démarrer normalement. Or l'ouverture et la fermeture de la soupape de décompression sont commandées par le pilote, en général au moyen d'un levier de commande monté sur le guidon. Il faut donc que le pilote agisse avec beaucoup de dextérité et en parfait synchronisme avec la mise en rotation du moteur, par exemple par le pédalier.Most engines of this type have therefore been fitted with a pressure relief valve which allows the combustion chamber of the engine to be placed in communication with the atmosphere. This prevents gas compression and the first turns of the engine are done without difficulty. However, it is necessary that this valve closes suddenly as soon as the rotation speed is sufficient for the engine to start normally. However, the opening and closing of the decompression valve are controlled by the pilot, generally by means of a control lever mounted on the handlebar. It is therefore necessary that the pilot acts with great dexterity and in perfect synchronism with the setting in rotation of the engine, for example by the pedals.

Le DE-B-1 069932 décrit un dispositif de décompression destiné à faciliter cette manœu- vre de démarrage. Ce dispositif comporte une came de blocage de la commande des soupapes, qui est immobilisée par un levier pivotant entraîné latéralement lors de la rotation du moteur et libérée après une course déterminée de ce levier. On obtient ainsi un réglage approprié de la fermeture de la soupape, qui n'intervient qu'après le démarrage.DE-B-1 069932 describes a decompression device intended to facilitate this starting maneuver. This device comprises a cam blocking the valve control, which is immobilized by a pivoting lever driven laterally during the rotation of the engine and released after a determined stroke of this lever. An appropriate adjustment of the valve closure is thus obtained, which takes place only after starting.

Un tel dispositif est toutefois difficilement adaptable sur des véhicules à deux roues, ou analogue, en raison notamment de sa complexité et de sa relative fragilité.Such a device is however difficult to adapt to two-wheeled vehicles, or the like, due in particular to its complexity and its relative fragility.

La présente invention a donc pour but de fournir une commande automatique assurant la fermeture de la soupape de décompression, après un nombre déterminé de tours de rotation du moteur, qui soit plus simple et plus robuste tout en étant extrêmement précise.The present invention therefore aims to provide an automatic control ensuring the closure of the decompression valve, after a determined number of engine rotation turns, which is simpler and more robust while being extremely precise.

Cette invention a en effet pour objet un dispositif de commande automatique de la fermeture de la soupape de décompression, caractérisé en ce qu'il comporte un doigt qui, au repos, recouvre l'extrémité d'un arbre solidaire en rotation du moteur et muni d'une gorge hélicoïdale périphérique, et est libre de basculer latéralement sous les actions opposées de la commande de décompression et du ressort de fermeture de la soupape de décompression, et qui est en outre articulé par rapport à son plan de basculement et constamment écarté élastiquement de ce plan en direction de l'arbre, de sorte que lorsque la commande de décompression est sollicitée, il bascule et est appliqué latéralement par le ressort de fermeture contre la gorge hélicoïdale de l'arbre qui empêche l'action de fermeture du ressort, puis est déplacé axialement par la rotation de la gorge hélicoïdale jusqu'à son retour sur l'extrémité de l'arbre, ce qui permet son basculement, libère le ressort et déclenche la fermeture de la soupape.The object of this invention is in fact an automatic control device for closing the decompression valve, characterized in that it comprises a finger which, at rest, covers the end of a shaft integral in rotation with the engine and provided of a peripheral helical groove, and is free to tilt laterally under the opposite actions of the decompression control and the closing spring of the decompression valve, and which is also articulated relative to its tilting plane and constantly elastically spread from this plane towards the shaft, so that when the decompression command is requested, it rocks and is applied laterally by the closing spring against the helical groove of the shaft which prevents the closing action of the spring, then is moved axially by the rotation of the helical groove until it returns to the end of the shaft, which allows it to tilt, releases the spring and triggers the closing of the valve.

Ainsi, c'est l'arbre lui-même qui interdit tout basculement au doigt, c'est-à-dire la fermeture de la soupape tant que le doigt est dans la gorge hélicoïdale. Ce n'est que lorsqu'il a parcouru la totalité de cette gorge et est parvenu à l'extrémité de l'arbre qu'il peut basculer brusquement en sens inverse et retrouver sa position de repos, ce qui provoque la fermeture de la soupape.Thus, it is the shaft itself which prohibits any tilting of the finger, that is to say the closing of the valve as long as the finger is in the helical groove. It is only when it has traversed the whole of this groove and has reached the end of the shaft that it can suddenly tilt in the opposite direction and return to its rest position, which causes the valve to close. .

La description ci-dessous d'un mode de réalisation donné à titre d'exemple non limitatif, et représenté aux dessins annexés, fera mieux apparaître les caractéristiques et avantages de l'invention.The description below of an embodiment given by way of nonlimiting example, and represented in the appended drawings, will better show the characteristics and advantages of the invention.

Sur ces dessins :

  • la figure 1 est une vue schématique d'un dispositif de commande selon l'invention, en position de fermeture de la soupape, la culasse du moteur étant représentée en coupe axiale ;
  • la figure 2 est une vue de côté, avec arrachement partiel, du système basculant dans la position de fermeture de la soupape ;
  • les figures 3 et 4 sont des vues, respectivement de côté avec arrachement partiel, et de face du système basculant en position d'ouverture de la soupape ;
  • la figure 5 est une vue partielle, en coupe longitudinale, de la culasse du moteur montrant la soupape de décompression en position ouverte.
In these drawings:
  • Figure 1 is a schematic view of a control device according to the invention, in the closed position of the valve, the cylinder head of the engine being shown in axial section;
  • Figure 2 is a side view, partially broken away, of the system tilting in the closed position of the valve;
  • Figures 3 and 4 are views, respectively from the side with partial cutaway, and from the front of the tilting system in the valve open position;
  • Figure 5 is a partial view, in longitudinal section, of the cylinder head of the engine showing the pressure relief valve in the open position.

Comme le montre la figure 1, le dispositif de commande de la soupape de décompression d'un moteur à explosion monté sur un cyclomoteur, ou analogue, comporte un levier 1 qui commande un câble 2 et est articulé sur le guidon 4 du véhicule, à proximité d'une poignée de commande 5. De la même manière, la soupape, ou plus exactement le ressort qui la rappelle en position de fermeture, est reliée à un câble de commande 6.As shown in FIG. 1, the device for controlling the decompression valve of an internal combustion engine mounted on a moped, or the like, comprises a lever 1 which controls a cable 2 and is articulated on the handlebar 4 of the vehicle, near a control handle 5. In the same way, the valve, or more precisely the spring which returns it to the closed position, is connected to a control cable 6.

En effet, la culasse 8 du moteur est percée d'un alésage 10 qui communique d'une part avec la chambre de combustion 12 et, d'autre part, avec un conduit 14 de mise à l'atmosphère. La communication entre l'alésage 10 et la chambre de combustion 12 est commandée par une soupape 16 solidaire d'une tige 18, qui coulisse dans un guide 20 solidaire de la culasse 8. Un ressort en épingle à cheveux 22 est monté entre le guide 20 et un levier 24 qui est fixé, d'une part à l'extrémité de la tige 18, et d'autre part à l'extrémité du câble 6. Comme le montre la figure 1 le ressort 22 rappelle ainsi constamment la soupape 16 dans sa position de fermeture.Indeed, the cylinder head 8 of the engine is pierced with a bore 10 which communicates on the one hand with the combustion chamber 12 and, on the other hand, with a duct 14 for venting. The communication between the bore 10 and the combustion chamber 12 is controlled by a valve 16 secured to a rod 18, which slides in a guide 20 secured to the cylinder head 8. A hairpin spring 22 is mounted between the guide 20 and a lever 24 which is fixed, on the one hand to the end of the rod 18, and on the other hand to the end of the cable 6. As shown in FIG. 1, the spring 22 thus constantly recalls the valve 16 in its closed position.

Les deux câbles de commande 2 et 6 sont fixés aux deux extrémités 25 et 27 respectivement, d'une plaque 26 susceptible de basculer parallèlement à elle-même autour d'un axe 28 placé à égale distance des deux points 25 et 27.The two control cables 2 and 6 are fixed at the two ends 25 and 27 respectively, of a plate 26 capable of tilting parallel to itself around an axis 28 placed at equal distance from the two points 25 and 27.

Sur l'une de ses faces la plaque 26 porte une chape traversée par un axe 31, autour duquel est articulé un doigt 32 (fig. 2). Un ressort 24 appuie, d'une part sur la plaque 26 et, d'autre part, sur le doigt 32 et tend à écarter ces deux organes l'un de l'autre.On one of its faces, the plate 26 carries a yoke crossed by an axis 31, around which a finger 32 is articulated (fig. 2). A spring 24 bears, on the one hand on the plate 26 and, on the other hand, on the finger 32 and tends to separate these two members from one another.

En position de repos, c'est-à-dire en position de fermeture de la soupape de décompression 16, le doigt 32 est en appui sur l'extrémité d'un arbre 35 qui est solidaire en rotation du moteur. Par exemple dans le mode de réalisation représenté, cet arbre 35 est constitué par un prolongement du vilebrequin 36 du moteur. Cet arbre 35 est porté par un palier fixe 38 et comporte, entre ce palier 38 et son extrémité, une gorge hélicoïdale 40 qui peut par exemple constituer un filet de vis.In the rest position, that is to say in the closed position of the decompression valve 16, the finger 32 is in abutment on the end of a shaft 35 which is integral in rotation with the engine. For example in the embodiment shown, this shaft 35 is constituted by an extension of the crankshaft 36 of the engine. This shaft 35 is carried by a fixed bearing 38 and comprises, between this bearing 38 and its end, a helical groove 40 which can for example constitute a screw thread.

Lorsque, lors du démarrage, le pilote appuie sur le levier 1 et tire ainsi le câble 2, il provoque un basculement latéral de la plaque 26 autour de l'axe 28. Le doigt 32 est entraîné dans ce mouvement de basculement et pivote lui aussi autour de l'axe 28. En conséquence, le bout 33 de ce doigt 32 qui recouvrait l'extrémité de l'arbre 35 se dégage latéralement de cet arbre et, par suite, se trouve repoussé par le ressort 34 jusqu'au contact du palier 38, c'est-à-dire en fait jusqu'à l'extrémité de la gorge hélicoïdale 40. Le basculement de la plaque 26 a exercé une traction sur le câble 6 et provoqué ainsi le rapprochement des branches de ressort 22, c'est-à-dire l'ouverture de la soupape 16 (fig.5).When, during start-up, the pilot presses on the lever 1 and thus pulls the cable 2, it causes a lateral tilting of the plate 26 around the axis 28. The finger 32 is driven in this tilting movement and also pivots around the axis 28. Consequently, the tip 33 of this finger 32 which covered the end of the shaft 35 emerges laterally from this shaft and, as a result, is pushed back by the spring 34 until it contacts the bearing 38, that is to say in fact up to the end of the helical groove 40. The tilting of the plate 26 exerted traction on the cable 6 and thus caused the spring branches 22, c '' i.e. the opening of the valve 16 (fig. 5).

A tout moment cependant les branches du ressort 22 tendent à s'écarter c'est-à-dire à refermer la soupape 16 et à tirer sur le câble 6 pour faire basculer la plaque 26 dans le sens des aiguilles d'une montre, en regardant les figures 1 à 4. Ce pivotement est toutefois rendu impossible par le contact du bout 33 du doigt 32 avec l'arbre 35, ou plus exactement la gorge 40. Même si le levier 1 est relâché par le pilote, la plaque 26 ne risque pas de pivoter.At any time, however, the branches of the spring 22 tend to move apart, that is to say to close the valve 16 and pull on the cable 6 to cause the plate 26 to tilt clockwise, in looking at Figures 1 to 4. This pivoting is however made impossible by the contact of the tip 33 of the finger 32 with the shaft 35, or more exactly the groove 40. Even if the lever 1 is released by the pilot, the plate 26 does not risk of pivoting.

Par contre, lorsque le pilote actionne le pédalier et provoque ainsi la rotation du moteur, cette rotation est facilitée par l'ouverture de la soupape de décompression. En outre l'arbre 35 étant solidaire en rotation du moteur, en étant par exemple comme représenté sur les figures 2 et 3 solidaire du vilebrequin 36, est entraîné en rotation par l'action sur le pédalier. La gorge hélicoïdale 40 se met également à tourner et provoque le déplacement du bout 33 du doigt 32 qui parcourt successivement les spires de cette gorge.On the other hand, when the pilot actuates the pedals and thus causes the rotation of the motor, this rotation is facilitated by the opening of the decompression valve. In addition the shaft 35 being integral in rotation with the engine, for example as shown in Figures 2 and 3 secured to the crankshaft 36, is rotated by the action on the pedal. The helical groove 40 also starts to rotate and causes the displacement of the tip 33 of the finger 32 which successively traverses the turns of this groove.

A la fin de son parcours le bout 33 arrive à l'extrémité de l'arbre 35 et brusquement se trouve libre. Plus rien alors ne s'oppose à l'effort exercé sur le câble 6 par le ressort 22, de sorte que la plaque 26 bascule latéralement et que la soupape 16 se trouve soudain fermée.At the end of its course, the tip 33 arrives at the end of the tree 35 and suddenly becomes free. Nothing more then opposes the force exerted on the cable 6 by the spring 22, so that the plate 26 rocks laterally and the valve 16 is suddenly closed.

Etant donné qu'avant de permettre cette fermeture brusque le doigt 32 a dû parcourir toutes les spires de la gorge 40, le moteur a automatiquement effectué un nombre de tours déterminé avant la fermeture de la soupape 16. Un choix approprié du nombre de spires de la gorge 40 permet au moteur d'effectuer, avant la fermeture de la soupape 16, un nombre de tours suffisant pour son lancement, de sorte qu'il peut ensuite facilement démarrer.Since before allowing this abrupt closure the finger 32 had to travel through all the turns of the groove 40, the motor automatically performed a determined number of revolutions before the valve 16 closed. An appropriate choice of the number of turns the groove 40 allows the engine to perform, before closing the valve 16, a sufficient number of revolutions for its launch, so that it can then easily start.

De préférence, comme le montrent notamment les figures 1 et 4, la chape 30 de support du doigt 32 est située en un point intermédiaire entre l'axe 28 de la plaque 26 et le point 25 de fixation du câble 2. De cette manière le bout 33 du doigt 32 vient au contact de la gorge 40 en un point qui se trouve également du même côté que le point 25 par rapport au plan passant par l'axe de pivotement 28 et par l'axe de l'arbre 35. Tout basculement de la plaque 26 en direction du câble 6 est ainsi totalement interdit tant que le moteur n'a pas effectué le nombre de tours voulu.Preferably, as shown in particular in FIGS. 1 and 4, the clevis 30 for supporting the finger 32 is situated at an intermediate point between the axis 28 of the plate 26 and the point 25 for fixing the cable 2. In this way the tip 33 of finger 32 comes into contact with groove 40 at a point which is also on the same side as point 25 with respect to the plane passing through pivot axis 28 and through axis of shaft 35. All tilting of the plate 26 in the direction of the cable 6 is thus completely prohibited as long as the engine has not performed the desired number of revolutions.

Grâce à un tel dispositif le pilote est absolument sûr que la soupape de décompression sera fermée exactement au moment nécessaire et il n'a aucune manoeuvre particulière à effectuer, la seule commande du levier 1 provoquant automatiquement et successivement l'ouverture puis la fermeture de cette soupape.Thanks to such a device, the pilot is absolutely sure that the decompression valve will be closed exactly when necessary and he has no particular maneuver to perform, the only command of the lever 1 automatically and successively causing the opening and closing of this valve.

On constate par ailleurs que le dispositif de commande ainsi réalisé est extrêmement simple tout en étant parfaitement sûr, ce qui le rend tout particulièrement adapté aux cyclomoteurs ou autres véhicules à deux roues.We also note that the control device thus produced is extremely simple while being perfectly safe, which makes it particularly suitable for mopeds or other two-wheeled vehicles.

Claims (5)

1. A device for automatically controlling the closure of the decompression valve (16) of an internal combusion engine, comprising means (1) for controlling the decompression and a return spring (22) for returning the valve to the closing position, characterised in that it comprises a finger member (32) which, at rest, overlaps the end of a shaft (35), connected to rotate with the engine and provided with a peripheral helical groove (40), and is free to swing laterally under the opposed actions of the decompression control and the spring (22) closing the decompression valve (16), and which is moreover pivotal relative to its swinging plane and constantly and elastically moved away from this plane in the direction of the shaft, so that, when the decompression control is actuated, it swings and is laterally applied by the closing spring (22) against the helical groove (40) of the shaft (35) which prevents the closing action of the spring (22), and is then axially displaced by the rotation of the helical groove (40) until it returns to the end of the shaft, which permits the swinging thereof, releases the spring (22) and causes the closure of the valve.
2. A device according to claim 1, characterised in that it comprises a plate which is capable of swinging laterally in its plane and is connected on each side of its pivot axis respectively to the valve closing spring and to the decompression control, the finger member (32) being pivotally mounted on the side of this plate which is in confronting relation to the helical groove.
3. A device according to claim 2, wherein the finger member (32) is pivotally mounted on the plate (26) between the pivot axis of the latter and its connection to the decompression control.
4. A device according to one of the claims 1-3, characterised in that the helical groove is a screwthread.
5. A device according to one of the claims 1-4, characterised in that the swinging means is connected, on one hand, to the valve closing spring and, on the other hand, to the decompression control by cables.
EP80401640A 1979-12-14 1980-11-17 Device for automatically controlling the closing of a decompression valve of an internal-combustion engine Expired EP0031261B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401640T ATE5345T1 (en) 1979-12-14 1980-11-17 DEVICE FOR AUTOMATICALLY CONTROLLING THE CLOSING OF A DECOMPRESSION VALVE OF AN INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7930752 1979-12-14
FR7930752A FR2471475A1 (en) 1979-12-14 1979-12-14 DEVICE FOR AUTOMATICALLY CONTROLLING THE CLOSURE OF THE DECOMPRESSION VALVE OF AN EXPLOSION ENGINE

Publications (2)

Publication Number Publication Date
EP0031261A1 EP0031261A1 (en) 1981-07-01
EP0031261B1 true EP0031261B1 (en) 1983-11-16

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EP80401640A Expired EP0031261B1 (en) 1979-12-14 1980-11-17 Device for automatically controlling the closing of a decompression valve of an internal-combustion engine

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US (1) US4369741A (en)
EP (1) EP0031261B1 (en)
JP (1) JPS5698537A (en)
AT (1) ATE5345T1 (en)
DE (1) DE3065635D1 (en)
ES (1) ES255329Y (en)
FR (1) FR2471475A1 (en)

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Publication number Priority date Publication date Assignee Title
SE455008B (en) * 1983-05-16 1988-06-13 Yanmar Diesel Engine Co FOR FUEL QUANTITY CONTROL DEVICE FOR DIESEL ENGINE WITH VERTICAL VEHICLE AXLE
JPS6014252U (en) * 1983-07-08 1985-01-30 本田技研工業株式会社 Internal combustion engine decompression device
US6000370A (en) * 1997-11-20 1999-12-14 Ryobi North America, Inc. Compression release mechanism for an internal combustion engine
US6415747B1 (en) * 1998-06-19 2002-07-09 Yamaha Hatsudoki Kabushiki Kaisha Two stroke, multiple cylinder engine for small vehicle
US6547021B1 (en) * 2000-11-22 2003-04-15 Yamaha Hatsudoki Kabushiki Kaisha Decompression arrangement for land vehicle
JP2002303110A (en) 2001-04-05 2002-10-18 Yamaha Motor Co Ltd Decompression device for engine
CN103362590B (en) * 2013-05-08 2015-05-13 浙江日晟农林科技有限公司 Engine starting pressure relief mechanism

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DE1069932B (en) * 1959-11-26 Motoren-Werke Mannheim A.G. vorm. Benz Abt. Stat. Motorenbau, Mannheim Decompression direction
US1749152A (en) * 1921-03-25 1930-03-04 Muller Friedrich Starting mechanism for internal-combustion engines
GB347553A (en) * 1929-11-07 1931-04-30 Hannoversche Maschb Ag Improvements in or relating to starting devices for internal combustion engines
US2016846A (en) * 1931-03-30 1935-10-08 Eclipse Aviat Corp Internal combustion engine
FR865039A (en) * 1939-04-27 1941-05-12 Suisse Construction Locomotive Pressure relief device for internal combustion engines
US2947300A (en) * 1957-05-31 1960-08-02 Outboard Marine Corp Starter-controlled engine compression relief
FR1187191A (en) * 1957-11-15 1959-09-08 Peugeot Cycles Ignition engine with decompression starter
JPS5335829A (en) * 1976-09-14 1978-04-03 Honda Motor Co Ltd Decompressing device to be used for motor bicycle and the like
JPS5443213Y2 (en) * 1976-12-13 1979-12-14

Also Published As

Publication number Publication date
ES255329U (en) 1981-09-16
US4369741A (en) 1983-01-25
EP0031261A1 (en) 1981-07-01
JPS5698537A (en) 1981-08-08
ATE5345T1 (en) 1983-12-15
ES255329Y (en) 1982-03-01
FR2471475B1 (en) 1983-02-25
FR2471475A1 (en) 1981-06-19
DE3065635D1 (en) 1983-12-22

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