FR2704020A1 - Rotary four-stroke three-piston combustion engine - Google Patents

Rotary four-stroke three-piston combustion engine Download PDF

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Publication number
FR2704020A1
FR2704020A1 FR9304663A FR9304663A FR2704020A1 FR 2704020 A1 FR2704020 A1 FR 2704020A1 FR 9304663 A FR9304663 A FR 9304663A FR 9304663 A FR9304663 A FR 9304663A FR 2704020 A1 FR2704020 A1 FR 2704020A1
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France
Prior art keywords
rotor
stator
pistons
piston
concave curve
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Granted
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FR9304663A
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French (fr)
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FR2704020B1 (en
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Bourhis Pierre
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Individual
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Individual
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Priority to FR9304663A priority Critical patent/FR2704020B1/en
Priority to ITTO940304A priority patent/IT1274262B/en
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Publication of FR2704020B1 publication Critical patent/FR2704020B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B13/00Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion
    • F01B13/04Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion with more than one cylinder
    • F01B13/06Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion with more than one cylinder in star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B53/00Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/22Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/02Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Rotary four-stroke three-piston combustion engine including a stator (2) in which there rotates a rotor (1) driving a transmission shaft. The rotor (1) includes radially, spaced by 120 DEG , three cylinders (10) which emerge at the periphery of the said rotor (1) and in each of which there can move a piston (3) in a reciprocating motion, connecting rods (31) secured so they can pivot to the pistons (3) crossing one another at the centre of the said rotor (1), their opposite ends from those by which they are attached to the said pistons (3) including, on either side, two rolling-contact bearings (34) in free rotation running in runway tracks (41, 51) which are similar and located opposite each other and each made in one of the internal flanks (40, 50) of the crank case (4) and of the end plate (5) of the stator (2), the said runway tracks (41, 51) having an approximate kidney bean shape and including two lobes (42, 43) with different radii, eccentric to the rotor (1).

Description

La présente invention a pour objet un moteur thermique rotatif à quatre temps et à trois pistons. The present invention relates to a rotary four-stroke thermal engine with three pistons.

On connaît déjà des moteurs rotatifs à pistons à deux ou quatre temps, comportant des pistons, généralement deux, qui se déplacent radialement dans un rotor tournant dans un stator, les extrémités des axes desdits pistons roulant sur une piste de roulement solidaire du stator, ladite piste de roulement étant excentrique ou à plusieurs lobes, selon le nombre ae pistons
Les moteurs rotatifs à pistons présentent de nombreux avantages par rapport aux moteurs classiques en ligne, notamment en ce qui concerne le rendement et le nombre très réduit de pièces, et ils sont de plus d'un encombrement réduit à puissance égale.
Rotary two or four-stroke piston engines are already known, comprising pistons, generally two, which move radially in a rotor rotating in a stator, the ends of the axes of said pistons rolling on a rolling track integral with the stator, said raceway being eccentric or with several lobes, depending on the number of pistons
Rotary piston engines have many advantages compared to conventional in-line engines, in particular with regard to the efficiency and the very reduced number of parts, and they are more of a reduced bulk for equal power.

Toutefois les moteurs rotatifs à pistons existants, comme par exemple ceux décrits dans les documents FR-A2.572.459 et FR-A-2.188,683, présentent des inconvénients de puissance, de souplesse et d'irrégularité de rotation. However, existing rotary piston engines, such as those described in documents FR-A2.572.459 and FR-A-2.188.683, have drawbacks of power, flexibility and irregularity in rotation.

La présente invention v' se à proposer un moteur rotation à pistons d'un type nouveau, de conception simple et de rotation continue, sans à-coups. The present invention v 'to provide a piston rotation engine of a new type, simple design and continuous rotation, smoothly.

Le moteur rotatif à pistons objet de la présente invention comprend un stator, fermé latéralement par des flasques, dans lequel peut tourner un rotor qui comporte radialement trois cylindres débouchant en périphérie dudit rotor, dans chacun desquels peut se déplacer un piston dans un mouvement de va et vient. Les bielles des pistons se croisent au centre du rotor, et leur extrémité opposée à celle de solidarisation audit piston comporte de part et d'autre deux roulements en libre rotation, d'axe parallèle à l'axe du rotor, roulant dans deux pistes de roulement semblables et disposées en regard pratiquées chacune dans l'un des flasques du stator.Les pistes de roulement sont approximativement en forme de haricot et comportent deux lobes de rayons différents, excentriques au rotor, l'un des raccordements de ces deux lobes étant réalisé selon une courbe continue convexe, l'autre selon une courbe concave de petit rayon. Le sens de rotation du rotor est celu permettant aux roulements de la bielle d'un piston de rouler dans le lobe de plus petit rayon après le passage de la courbe concave. The rotary piston engine object of the present invention comprises a stator, closed laterally by flanges, in which can rotate a rotor which comprises radially three cylinders opening at the periphery of said rotor, in each of which can move a piston in a reciprocating movement. and come. The connecting rods of the pistons cross at the center of the rotor, and their opposite end to that of securing to said piston comprises on either side two bearings in free rotation, of axis parallel to the axis of the rotor, rolling in two tracks of similar bearings and arranged opposite, each made in one of the flanges of the stator. The running tracks are approximately in the shape of a bean and have two lobes of different radii, eccentric to the rotor, one of the connections of these two lobes being produced. according to a continuous convex curve, the other according to a concave curve of small radius. The direction of rotation of the rotor is that allowing the bearings of the rod of a piston to roll in the lobe of smaller radius after the passage of the concave curve.

Trois lumières sont pratiquées à 120 en périphérie dans le stator, l'une d'elles, celle diamétralement opposée au raccordement concave des deux lobes de la piste de roulement, étant équipée d'une bougie d'al,umage, les deux autres servant à l'admission et à l'échappement. Three lights are formed at 120 at the periphery in the stator, one of them, the one diametrically opposite to the concave connection of the two lobes of the raceway, being fitted with a spark plug, the other two serving intake and exhaust.

La forme des pistes de roulement permet à chacun des pistons, en se rapprochant de l'axe du rotor ou en s'en éloignant, de réaliser, lors dune rotation complète du rotor, deux aller et retour, créant ainsi les quatre temps du moteur1 les trois pistons permettant trois explosions par tour. The shape of the raceways allows each of the pistons, by approaching or moving away from the axis of the rotor, to realize, during a complete rotation of the rotor, two round trips, thus creating the four times of the engine1 the three pistons allowing three explosions per turn.

Le lobe de grand rayon permet l'admission et la compression, le temps moteur étant réalisé lorsque le galet du piston en phase de combustion franchit la courbe concave pour entrer dans le lobe de petit rayon. The large radius lobe allows admission and compression, the engine time being achieved when the roller of the piston in combustion phase crosses the concave curve to enter the small radius lobe.

Il est à noter que la piste de roulement peut avoir un tracé différent, notamment la partie du lobe de petit rayon permettant le déplacement des galets de l'intérieur vers i' extérieur du rotor peut être rectiligne avec une certaine pente. It should be noted that the raceway can have a different layout, in particular the part of the lobe of small radius allowing the movement of the rollers from the inside to the outside of the rotor can be rectilinear with a certain slope.

Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non iimitatT.  The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.

Dans le dessin annexé
- la figure 1 représente une vue schématique en plan d'un moteur rotatif à pistons selon l'invention.
In the attached drawing
- Figure 1 shows a schematic plan view of a rotary piston engine according to the invention.

- la figure 2 représente une vue en coupe transversale du stator du même moteur. - Figure 2 shows a cross-sectional view of the stator of the same motor.

- la figure 3 représente une vue en coupe selon l'axe
XX' de la figure 2.
- Figure 3 shows a sectional view along the axis
XX 'of figure 2.

- la figure 4 représente une vue en coupe transversale du rotor du même moteur. - Figure 4 shows a cross-sectional view of the rotor of the same motor.

- la figure 5 représente une vue en coupe selon l'axe
YY' de la figure 4.
- Figure 5 shows a sectional view along the axis
YY 'of figure 4.

- la figure 6 représente une vue schématique du même moteur, montrant différentes positions d'un piston lors d'une rotation sur un tour. - Figure 6 shows a schematic view of the same engine, showing different positions of a piston during rotation on a revolution.

Si on se réfère à la figure 1 on peut voir qu'un moteur rotatif à pistons selon I'invention comporte un rotor 1 pouvant tourner dans un stator 2 et entrainant un arbre de transmission non représenté. Referring to FIG. 1, it can be seen that a rotary piston engine according to the invention comprises a rotor 1 which can rotate in a stator 2 and driving a not shown transmission shaft.

Si on se réfère également aux figures 4 et 5 on peut voir que le rotor b comporte radialement, espacés de 120 trois cylindres 10 renfermant chacun un piston 3 et prolongés chacun de facon diamétrale par une cavité 11, les trois cavités 11 se croisant au coeur du rotor 1. If we also refer to Figures 4 and 5 we can see that the rotor b has radially, spaced 120 three cylinders 10 each containing a piston 3 and each extended diametrically by a cavity 11, the three cavities 11 intersecting at the heart rotor 1.

Les pistons 3 comportent intérieurement, de manière connue en soi, un axe transversal 30, parallèle à l'axe de rotation du rotor " sur lequel peut pivoter par une de ses extrémités une bielle 31, dont l'autre extrémité est traversée par un axe 32, également parallèle à l'axe de rotation du rotor 1, sur lequel sont montés d'une part, de part et d'autre de la bielle 31, deux excentriques 33 logés dans des cavités circulaires 12 pratiquées dans les flancs du rotor 1, et d'autre part1 à chacune des extrémités de l'axe 32, un roulement à aiguilles 34. The pistons 3 internally comprise, in a manner known per se, a transverse axis 30, parallel to the axis of rotation of the rotor "on which a connecting rod 31 can pivot by one of its ends, the other end of which is crossed by an axis 32, also parallel to the axis of rotation of the rotor 1, on which are mounted on the one hand, on either side of the connecting rod 31, two eccentrics 33 housed in circular cavities 12 formed in the sides of the rotor 1 , and on the other hand1 at each end of the axis 32, a needle bearing 34.

Il est à noter que les bielles 31 ont une forme appropriée permettant leur cro-sent au centre du rotor 1. It should be noted that the connecting rods 31 have an appropriate shape allowing their growth in the center of the rotor 1.

Si on se réfère maintenant aux figures 2 et 3 on peut voir que le stator 2, qui est constitué de deux parties, un carter 4 et un flasque x, assemblées par des moyens appropriés du type vis, non représents, comporte une chambre cylindrique 20 destinée à abriter le rotor 1 et essentiellement réalisée dans le carter 4. Referring now to Figures 2 and 3 we can see that the stator 2, which consists of two parts, a housing 4 and a flange x, assembled by suitable means of the screw type, not shown, has a cylindrical chamber 20 intended to house the rotor 1 and essentially produced in the casing 4.

Chacun des flancs intérieurs 40 et 50, respectivement du carter 4 et du flasque 5 du stator 2, comporte une gorge 41, respectivement 51, les deux gorges 41 et 51 étant semblables et disposées en regard lorsque le flasque 5 est assemblé au carter 4
La gorge 41, seule visible sur la figure 2, a la forme approximative d'un haricot, et elle est divisée en plusieurs zones se rapprochant ou s'éloignant du centre du rotor 1, à savoir d'une part un lobe 42 excentrique à l'axe de rotation, de grand rayon, et 'sutre part un lobe 43, également excentrique à l'axe de rotation, de plus petit rayon.Les raccordements des lobes 42 et 43, qui correspondent au;t points les plus proches du centre du rotor 1, sont réalisés d'une part selon une courbe 44 assurant la continuité des deux lobes 42 et 43, et d'autre part selon une courbe concave 45 de très petit rayon.
Each of the inner flanks 40 and 50, respectively of the casing 4 and of the flange 5 of the stator 2, has a groove 41, respectively 51, the two grooves 41 and 51 being similar and arranged opposite when the flange 5 is assembled to the casing 4
The groove 41, the only one visible in FIG. 2, has the approximate shape of a bean, and it is divided into several zones approaching or moving away from the center of the rotor 1, namely on the one hand an eccentric lobe 42 with the axis of rotation, of large radius, and on the other hand a lobe 43, also eccentric to the axis of rotation, of smaller radius. The connections of lobes 42 and 43, which correspond to the t points closest to the center of the rotor 1, are produced on the one hand along a curve 44 ensuring the continuity of the two lobes 42 and 43, and on the other hand according to a concave curve 45 of very small radius.

Les bords extérieurs 11' et 51' des gorges 41 et 51 constituent des pistes de roulement pour les roulements 34 des bielles 31 dans lesquelles ceux-c sont engagés. The outer edges 11 'and 51' of the grooves 41 and 51 constitute rolling tracks for the bearings 34 of the connecting rods 31 in which these are engaged.

On peut voir égal'ment que la paroi périphérique interne 46 du carter 4 est percée de lumières 47, 48 et 49, la lumière 47 comportant une bougie d'allumage 6. It can also be seen that the internal peripheral wall 46 of the casing 4 is pierced with lights 47, 48 and 49, the light 47 comprising a spark plug 6.

Les emplacements des lumières 47, 48 et 49 sont étroitement liés au tracé des gorges 41 et 51 : la lumière 47 comportant la bougie 6 est sensiblement diamétralement opposée à la courbe concave 45, la lumière 18 est sensiblement diamétralement opposite au point de la courbe 44 le plus proche du centre du rotor 1 et la lumière 49 est sensiblement opposée au point du lobe 42 le plus excentre. The locations of the lights 47, 48 and 49 are closely linked to the layout of the grooves 41 and 51: the light 47 comprising the candle 6 is substantially diametrically opposite the concave curve 45, the light 18 is substantially diametrically opposite the point of the curve 44 closest to the center of the rotor 1 and the lumen 49 is substantially opposite the most eccentric point of the lobe 42.

Si on se réfère maintenant à la figure ô on peut voir qu'au cours d'une rotation d'un tour du rotor 1 dans le stator 2, dans le sens de la flèche R, un piston 3, du fait de sa liaison mecanique aux gorges 41 et 51, décrit deux mouvements alternatifs de va et vivent dans son cylindre 10, et irversemPnt le mouvement de va et vivent d'un piston 3 dans son cylindre 10 entrane la rotation du rotor 1 dans le stator 2. If we now refer to Figure ô we can see that during a rotation of one revolution of the rotor 1 in the stator 2, in the direction of the arrow R, a piston 3, due to its mechanical connection in grooves 41 and 51, describes two reciprocating movements of going and living in its cylinder 10, and irversemPnt the going and living movement of a piston 3 in its cylinder 10 causes the rotation of the rotor 1 in the stator 2.

Lors du déplacement des galets 34 dans les gorges 41 et 51, les excentriques 33 tournent librement dans leurs cavités circulaires respectives 12 dans le sens de la flèche
R', de même direction que la flèche R, conférant ainsi aux bielles 31 une certaine liberté de déplacement angulaire autour de leur axe 30. Il est à ncter que pour permettre la rotation des excentriques 33 dans les cavités 12, l'axe 32 est excentré d'une valeur égale à la moitié du déplacement d'un piston 3 dans un cylindre 10.
When the rollers 34 move in the grooves 41 and 51, the eccentrics 33 rotate freely in their respective circular cavities 12 in the direction of the arrow
R ', in the same direction as the arrow R, thus giving the connecting rods 31 a certain freedom of angular movement around their axis 30. It is necessary to ncter only to allow the rotation of the eccentrics 33 in the cavities 12, the axis 32 is offset by a value equal to half the displacement of a piston 3 in a cylinder 10.

La lumière 49 est reliée à un dispcsitif d'admission d'un mélange 60 d'air et d'essence, non représenté, ce mélange 60 étant aspiré dans le cylindre 10 par le piston 3 qui se déplace de l'extérieur vers l'intérieur du rotor 1 du fait de l'entrée des galets 34 de la bielle 31 correspondante dans le lobe 42. Afin que l'aspiration soit continue au cours du déplacement du piston 3, la paroi périphérique interne 46 du carter A est creusée d'une gorge 4S' disposée en avant de la lumière 49, le mélange 60 se répandant dans cette gorge 49'. The light 49 is connected to a device for admitting a mixture 60 of air and gasoline, not shown, this mixture 60 being sucked into the cylinder 10 by the piston 3 which moves from the outside towards the inside of the rotor 1 due to the entry of the rollers 34 of the corresponding rod 31 into the lobe 42. In order for the suction to be continuous during the displacement of the piston 3, the internal peripheral wall 46 of the casing A is hollowed out with a groove 4S 'disposed in front of the lumen 49, the mixture 60 spreading in this groove 49'.

Après le passage du cylindre 10 en regard de la lumière 49, 7e piston 3, dont les galets 34 amorcent la sortie du lobe 42, se déplace de l'intérieur vers l'extérieur du rotor 1, ce qui a pour effet de comprimer le mélange 60 contre la paroi périphérique interne 46 du carter 4, la compression maximum, real isée lorsque les galets 34 sont dans la courbe concave 45, intervenant en regard de la lumière 47 contenant la bougie 6. After the passage of the cylinder 10 opposite the light 49, the 7th piston 3, the rollers 34 of which initiate the exit of the lobe 42, moves from the inside towards the outside of the rotor 1, which has the effect of compressing the mixture 60 against the internal peripheral wall 46 of the casing 4, the maximum compression, real ized when the rollers 34 are in the concave curve 45, acting opposite the light 47 containing the spark plug 6.

L'étincelle produite par la bougie 6, commandée par un allumage électronique de type connu, non représenté, provoque la combustion du mélange comprime 61, ce qui à pour effet de repousser le piston 2 dans son cylindre 10, les galets oi4 s'engageant dans le lobe 43 réalisant ainsi le temps moteur. The spark produced by the spark plug 6, controlled by an electronic ignition of known type, not shown, causes the combustion of the compressed mixture 61, which has the effect of pushing the piston 2 back into its cylinder 10, the rollers oi4 engaging in lobe 43 thus realizing the motor time.

Lorsque les galets 3 amorcent leur sortie du lobe 43 et leur entrée dans la courbe 44 le piston se déplace dans le cylindre 10 de l'intérieur vers l'extérieur du rotor 1, et expulse les gaz brûlés 62 par la lumière 48, qui est prolongée en avant par une gorge 48' pratiquée dans la paroi périphérique interne 46 du carter 4. When the rollers 3 initiate their exit from the lobe 43 and their entry into the curve 44 the piston moves in the cylinder 10 from the inside towards the outside of the rotor 1, and expels the burnt gases 62 by the light 48, which is extended forward by a groove 48 'formed in the internal peripheral wall 46 of the casing 4.

Les trois pistons 3 autorisent ainsi une parfaite continuité de roulement en permettant trois explosions par tour, la phase d'aspiration de l'un et la phase de compression d'un autre étant permises par le temps moteur du troisième. The three pistons 3 thus allow perfect rolling continuity by allowing three explosions per revolution, the suction phase of one and the compression phase of another being allowed by the engine time of the third.

Le refroidissement du moteur selon l'invention est réalisé par eau circulant dans le flasque 5 et le carter 4 du stator 2, et la lubrtficat,on par circulation d'huile entre le stator 2 et le rotor 1. The cooling of the motor according to the invention is carried out by water circulating in the flange 5 and the casing 4 of the stator 2, and the lubrtficat, by the circulation of oil between the stator 2 and the rotor 1.

1-1 va de soi que la présente invention ne saurait être limitée à la description qui précède d'un de ses modes de reallsat on, susceptible de subir un certain nombre de modfications sans pour autant sortir du cadre de l'invention.  1-1 goes without saying that the present invention cannot be limited to the preceding description of one of its modes of reallsat on, capable of undergoing a certain number of modifications without thereby departing from the scope of the invention.

Claims (4)

REVENDICATIOt4S 1) Moteur thermique rotatif à quatre temps et à trois pistons comportant un stator (9) dans lequel tourne un rotor (1) entraînant un arbre de transmission, caractérisé en ce que1) Four-stroke rotary engine with three pistons comprising a stator (9) in which a rotor (1) rotates driving a drive shaft, characterized in that - le rotor (1) comporte radialement, espacés de 120 , trois cylindres (10) qui débouchent en périphérie dudit rotor (1) et dans chacun desquels peut se déplacer un piston (3) dans un mouvement de va et vient, des bielles (31) solidarisées de façon pivotante aux pistons (3) se croisant au centre dudit rotor (1), leurs extrémités opposées à celles de solidarisation auxdits pistons (3) comportant de part et d'autre deux roulements (34) en libre rotation roulant dans deux pistes de roulement (41, 51) semblables et disposées en regard, pratiquées chacune dans l'un des flancs intérieurs (4G, 50) du carter (4) et du flasque (5) du stator (2), lesdites pistes de roulement (41, 51) ayant une forme approximative de haricot et comportant deux lobes (42, 43) de rayons différents, excentriques au rotor (1), l'un des raccordements de ces deux lobes (42, 43) étant réalisé selon une courbe continue convexe (44) de grand rayon, l'autre selon une courbe concave (45) de petit rayon, le sens de rotation (R) du rotor (1) étant celui permettant aux roulements (34) de rouler dans le lobe (434 de plus petit rayon après le passage de la courbe concave (45) - the rotor (1) comprises radially, spaced 120, three cylinders (10) which open at the periphery of said rotor (1) and in each of which a piston (3) can move in a reciprocating movement, connecting rods ( 31) pivotally joined to the pistons (3) crossing at the center of said rotor (1), their ends opposite to those for joining to said pistons (3) comprising on both sides two bearings (34) in free rotation rolling in two similar running tracks (41, 51) arranged opposite, each made in one of the inner sides (4G, 50) of the casing (4) and of the flange (5) of the stator (2), said running tracks (41, 51) having an approximate bean shape and comprising two lobes (42, 43) of different radii, eccentric to the rotor (1), one of the connections of these two lobes (42, 43) being produced according to a curve continuous convex (44) of large radius, the other along a concave curve (45) of small radius, the direction of rotation (R) of the rotor (1) being that allowing the bearings (34) to roll in the lobe (434 of smaller radius after the passage of the concave curve (45) - le stator (2) comporte trois lumières (47, 48, 49) espacées de t20 , l'une d'elles, (47), diamétralement opposée à la courbe concave (45) des pistes (41, 51), étant pourvue d'une bougie d'allumage (6), les deux autres (49, 48) servant à l'admission et à l'échappement. - The stator (2) comprises three lights (47, 48, 49) spaced from t20, one of them (47), diametrically opposite to the concave curve (45) of the tracks (41, 51), being provided a spark plug (6), the other two (49, 48) used for intake and exhaust. 2) Moteur thermique selon la revendication 1 caractérisé en ce que les axes (32) traversant les bielles (31) et portant en extrémités les roulements (34) traversent des excentriques (33) tournant librement dans des cavités circulaires (12) pratiquées dans les flancs du rotor (1),2) A heat engine according to claim 1 characterized in that the axes (32) passing through the connecting rods (31) and carrying the bearings (34) at the ends pass through eccentrics (33) rotating freely in circular cavities (12) formed in the rotor sides (1), 3) Moteur thermique selon la revendication 1 ou la revendication 2 caractérisé en ce que la paroi interne périphérique (46) du stator (2) est creusée de gorges (48', 49') en avant des lumières (48, 49) d'échappement et d7admission. 3) A heat engine according to claim 1 or claim 2 characterized in that the peripheral internal wall (46) of the stator (2) is hollowed out of grooves (48 ', 49') in front of the lights (48, 49) of exhaust and intake. 4) Moteur thermique selon l'une quelconque des revendications précédentes caractérisé en ce que l'amorce du lobe (43) des pistes de roulement (41, 51), après la courbe concave (45), est rectiligne avec une certaine pente. 4) A heat engine according to any one of the preceding claims characterized in that the start of the lobe (43) of the raceways (41, 51), after the concave curve (45), is rectilinear with a certain slope.
FR9304663A 1993-04-16 1993-04-16 Four-stroke rotary engine with three pistons. Expired - Fee Related FR2704020B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9304663A FR2704020B1 (en) 1993-04-16 1993-04-16 Four-stroke rotary engine with three pistons.
ITTO940304A IT1274262B (en) 1993-04-16 1994-04-18 FOUR STROKE THREE-PISTOL ROTARY THERMAL ENGINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9304663A FR2704020B1 (en) 1993-04-16 1993-04-16 Four-stroke rotary engine with three pistons.

Publications (2)

Publication Number Publication Date
FR2704020A1 true FR2704020A1 (en) 1994-10-21
FR2704020B1 FR2704020B1 (en) 1995-10-13

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FR9304663A Expired - Fee Related FR2704020B1 (en) 1993-04-16 1993-04-16 Four-stroke rotary engine with three pistons.

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FR (1) FR2704020B1 (en)
IT (1) IT1274262B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002100A1 (en) * 2008-05-23 2009-11-26 Vonderlind, Manfred Motor with a cam
WO2014036626A1 (en) * 2012-09-10 2014-03-13 Beltrao Francisco Elisio Simoes Alternating rotary engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1568684A (en) * 1923-10-27 1926-01-05 Michel Hermann Engine, and particularly internal-combustion engine
US1765237A (en) * 1928-02-17 1930-06-17 Fred H King Triple-cam-drive gasoline engine
BE701842A (en) * 1967-07-26 1968-01-02
US3680444A (en) * 1970-09-29 1972-08-01 Leonard R Casey Rotary kinetic device with coplaner tandem pistons
FR2300218A1 (en) * 1975-02-10 1976-09-03 Uchikoba Sayoko Radial piston IC engine - cylinders are contained in rotor turning at one third of crankshaft speed (NL120876)
US4023536A (en) * 1972-09-05 1977-05-17 Townsend Engineering Company Method of controlling the timing of ignition in an internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1568684A (en) * 1923-10-27 1926-01-05 Michel Hermann Engine, and particularly internal-combustion engine
US1765237A (en) * 1928-02-17 1930-06-17 Fred H King Triple-cam-drive gasoline engine
BE701842A (en) * 1967-07-26 1968-01-02
US3680444A (en) * 1970-09-29 1972-08-01 Leonard R Casey Rotary kinetic device with coplaner tandem pistons
US4023536A (en) * 1972-09-05 1977-05-17 Townsend Engineering Company Method of controlling the timing of ignition in an internal combustion engine
FR2300218A1 (en) * 1975-02-10 1976-09-03 Uchikoba Sayoko Radial piston IC engine - cylinders are contained in rotor turning at one third of crankshaft speed (NL120876)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002100A1 (en) * 2008-05-23 2009-11-26 Vonderlind, Manfred Motor with a cam
WO2014036626A1 (en) * 2012-09-10 2014-03-13 Beltrao Francisco Elisio Simoes Alternating rotary engine

Also Published As

Publication number Publication date
ITTO940304A0 (en) 1994-04-18
ITTO940304A1 (en) 1995-10-18
IT1274262B (en) 1997-07-17
FR2704020B1 (en) 1995-10-13

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