EP0551504B1 - Rotary throttle valve and utilisation of said throttle valve for the transfer of a fluid to a combustion chamber of an internal combustion angine - Google Patents
Rotary throttle valve and utilisation of said throttle valve for the transfer of a fluid to a combustion chamber of an internal combustion angine Download PDFInfo
- Publication number
- EP0551504B1 EP0551504B1 EP92917739A EP92917739A EP0551504B1 EP 0551504 B1 EP0551504 B1 EP 0551504B1 EP 92917739 A EP92917739 A EP 92917739A EP 92917739 A EP92917739 A EP 92917739A EP 0551504 B1 EP0551504 B1 EP 0551504B1
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- EP
- European Patent Office
- Prior art keywords
- engine
- valve
- axis
- plug
- passage
- 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.)
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Classifications
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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
- F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
- F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
- F01L7/021—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with one rotary valve
- F01L7/025—Cylindrical valves comprising radial inlet and side outlet or side inlet and radial outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
Definitions
- the present invention relates to an engine comprising a rotary valve for transferring a fluid between a source of fluid and a combustion chamber of an internal combustion engine; said plug comprising at least one substantially cylindrical surface and a lateral flank.
- the prior art includes the document FR 2 559 208.
- the present invention relates more particularly to an engine comprising at least one rotary plug for controlling the admission of gas, in particular of an air-fuel mixture into a combustion chamber of an engine, comprising an intrinsic sealing system.
- the present invention applies to two-stroke or four-stroke internal combustion engines having one or more cylinders supplied by a gas, in particular an air-fuel mixture.
- the distribution of a fuel mixture in the combustion chamber can be carried out by parts moving in a reciprocating movement such as valves.
- the Applicant has protected, in patent application EP-A-0 435 730, a system of this type.
- the performance of the engine may be limited by the injection systems with valves, in particular with regard to the control of the start and the end of the injection and the cross section of the carburetted air (oscillation problems). .
- the bushels thus disclosed have an axis of rotation situated in a plane perpendicular to the axis of the cylinder, are pierced with a transverse channel for bringing the connecting channel and the combustion chamber into communication and are connected to means of drive allowing them to rotate as a function of the rotation speed of the engine crankshaft.
- Sealing devices are sometimes provided for this purpose, either upstream or downstream of each plug, or in both places.
- Patent application FR 2 559 208 relates to a plug for controlling the exhaust and / or the admission of gas from and / or to a combustion chamber to which one or more sealing members is applied.
- the improvement envisaged in this patent consists of lubrication and refrigeration of the contact surface between the sealing member (s) and the plug.
- the present invention provides an engine comprising a rotary valve of simple design, which does not require an additional and independent sealing member at the intake.
- the invention relates to an engine comprising a rotary plug according to claim 1.
- the face of the channel furthest from the longitudinal axis of the plug moves away from said axis from the inlet orifice.
- At least one of said plug flow channels may include a fuel trapping means.
- said fuel trapping means consists of an elbow formed by said channel and capable of retaining said fuel under the effect of the centrifugal force created by the rotation of the plug.
- the rotary valve is intended to control the admission of an air-fuel mixture into the combustion chamber of an internal combustion engine.
- the plug further comprises, from a certain distance from its end opposite to the combustion chamber, two channels arranged symmetrically with respect to a longitudinal plane.
- the plug may include an axial channel intended for its cooling.
- the plug can be mounted in a single-cylinder engine, placed at the entrance to the combustion chamber;
- several bushels can be mounted, each in the cylinder head of a combustion chamber of a multi-cylinder engine.
- a single axial cooling channel then preferably passes through all of the bushels.
- one or more bushels according to the invention can be fitted to an outboard motor, their longitudinal axis (s) then being able to be vertical.
- Figure 1 illustrates the arrangement of plugs in the case of a multi-cylinder engine.
- the cylinders 1 (three in number in this example) each capped by a cylinder head 2 whose hemispherical bottom defines the upper part of the combustion chamber 4 which is further delimited by the walls of the cylinder 1 and by the upper part of the piston 5.
- At each cylinder at least one injection orifice 3 provides communication between the combustion chamber 4 and at least one rotary plug 6 according to the invention.
- the plug 6 is rotatably mounted in the cylinder head 2 and controls the distribution of a mixture compressed air and fuel in the combustion chamber 4 since it is placed between the injection orifice 3 and a conduit (not referenced) for supplying compressed air.
- a fuel injection device 7 is preferably placed on the compressed air duct, at the inlet of the plug 6.
- each bushel of generally cylindrical shape, comprises at least one longitudinal shaft 8 which protrudes at least on one side and comes to bear on a bearing 9.
- the shafts 8 of the various bushels can be brought to an end at the end.
- each shaft 8 is hollow, which allows a coolant to pass through, for example, intended to cool the interior of said plug. This function is important given the rotation speeds of the plugs.
- a single cylindrical shaft 8 can cross all the bushels, or shaft sections can be mounted on either side of a cylindrical bushel.
- FIG. 2 shows in more detail a plug 6 according to the invention.
- the general shape of the plug can be cylindrical, with a longitudinal axis of rotation 10. As has been said, an axial channel 11, coincident with the axis 10 of rotation of the plug allows for example to circulate a coolant to the inside the bushel.
- a channel 12 intended for the flow of an air mixture under pressure-fuel for example, is provided inside the plug.
- the channel 12 is not straight, is preferably of variable section and has a first orifice or outlet orifice 121 cooperating with the combustion chamber 4 and a second orifice or inlet orifice 122, through which the mixture is introduced.
- the inlet orifice 122 belongs to the lateral surface of the plug and is placed at a non-zero distance from the axis 10 of rotation of the plug while the outlet orifice 121 belongs to the cylindrical surface of the plug while being offset radially with respect to the inlet 122.
- the outlet 121 is in any case placed farther from the axis 10 of rotation than the inlet 122.
- the neutral axis or fiber 123 of the channel 12 can be substantially parallel to the axis of rotation 10 of the plug 6.
- the fuel injector 7 opens near the inlet, inside the plug. More precisely, the injector 7 is oriented so that the axis of the jet that it generates is substantially contained in the same plane as the face 124 of the channel 12 closest to the axis 10 of the plug.
- the wall 125 of the channel 12 furthest from the axis 10 is inclined so that it moves away from the axis 10 from the end 122 of the plug.
- Figures 3 and 4 help to better understand the geometry of the plug at the inlet 122.
- two channels 12 A and 12 B arranged symmetrically with respect to a longitudinal plane of the plug.
- a larger number of channels can be provided without departing from the scope of the invention.
- Each channel 12 and each associated injector 7 must preferably be arranged as indicated above.
- Figure 3 which illustrates the zone into which the injector 7 enters shows the annular injection sector while in Figure 4 appears the partitioning of this sector into two zones 12 A, 12 B at the origin of the two channels. If two channels are provided, the plug will then rotate twice as fast as the engine in the case of an application to a two-stroke engine.
- a fuel trapping means can be provided, according to the invention, downstream of the inlet 122.
- This means can consist of a double deflection of the channel 12 which moves away then approaches the axis 10 of the plug, thus forming a "pocket” 126 that the centrifugal force contributes to filling.
- FIGS. 5, 6 and 7 illustrate the path of the channel 12 or more precisely of the two channels 12 A and 12 B provided according to this embodiment, downstream of the inlet 122.
- the trapping means is intended to complete and improve the seal produced at the level of the inlet 122 of the plug.
- the end 121 of the channel 12 allows an arrival of the mixture in the axis of the orifice 3, which is known per se.
- the rotary drive of the bushel can be achieved by any means known per se (belt, chain, sprockets, ...) so that it is controlled by the speed of the motor or a sub-multiple of this speed, depending the number of channels planned.
- the plug is capable of entraining the fuel particles towards the interior of the channel 12.
- the seal is completed by means of trapping the heaviest particles of the mixture.
- This means is advantageously capable of trapping the particles before the admission phase. This means makes it possible to retain the trapped fuel and prevent it from going out to one or the other of the ends of the plug as long as the intake is closed.
- the pressure variation allows said particles to be immediately reintroduced into the mixture and sprayed to the combustion chamber.
- the plugs according to the invention can be aligned as shown in Figure 1 thus providing a long axial channel 11 preferably intended for the passage of a cooling fluid.
- a single rotary drive is necessary for all of the plugs thus mounted.
- Figures 2 to 7 show the case of a plug crossed by two channels 12, it can be envisaged without departing from the scope of the invention that the two channels meet near the end 121 opening towards the combustion chamber .
- the plug (s) then have the same speed of rotation as the motor.
- these can also have the shape of a convergent-divergent along their length.
- plugs according to the invention can be made for example of aluminum, by molding.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
La présente invention concerne un moteur comprenant un boisseau rotatif de transfert d'un fluide entre une source de fluide et une chambre de combustion d'un moteur à combustion interne ; ledit boisseau comportant au moins une surface sensiblement cylindrique eet un flanc latéral.The present invention relates to an engine comprising a rotary valve for transferring a fluid between a source of fluid and a combustion chamber of an internal combustion engine; said plug comprising at least one substantially cylindrical surface and a lateral flank.
Dans le domaine, l'art antérieur comprend le document FR 2 559 208.In the field, the prior art includes the
La présente invention concerne plus particulièrement un moteur comprenant au moins un boisseau rotatif de contrôle de l'admission de gaz notamment d'un mélange air-carburant dans une chambre de combustion d'un moteur, comportant un système d'étanchéité intrinsèque.The present invention relates more particularly to an engine comprising at least one rotary plug for controlling the admission of gas, in particular of an air-fuel mixture into a combustion chamber of an engine, comprising an intrinsic sealing system.
La présente invention s'applique aux moteurs à combustion interne deux temps ou quatre temps ayant un ou plusieurs cylindres alimentés par un gaz notamment un mélange air-carburant.The present invention applies to two-stroke or four-stroke internal combustion engines having one or more cylinders supplied by a gas, in particular an air-fuel mixture.
La distribution d'un mélange carburé dans la chambre de combustion peut être réalisée par des pièces animées d'un mouvement alternatif telles que des soupapes. La Demanderesse a protégé, dans la demande de brevet EP-A-0 435 730 un système de ce type.The distribution of a fuel mixture in the combustion chamber can be carried out by parts moving in a reciprocating movement such as valves. The Applicant has protected, in patent application EP-A-0 435 730, a system of this type.
Cependant les performances du moteur peuvent être limitées par les systèmes d'injection à soupapes, notamment en ce qui concerne le contrôle du début et de la fin de l'injection et la section de passage de l'air carburé (problèmes d'oscillation).However, the performance of the engine may be limited by the injection systems with valves, in particular with regard to the control of the start and the end of the injection and the cross section of the carburetted air (oscillation problems). .
De plus ces systèmes doivent être montés dans des culasses de taille relativement importante. Une amélioration consiste à utiliser des boisseaux rotatifs pour le contrôle et la distribution d'un mélange carburé.In addition these systems must be mounted in cylinder heads relatively large in size. An improvement consists in using rotary plugs for the control and the distribution of a fuel mixture.
Ainsi il est connu d'utiliser des boisseaux rotatifs pour la commande de l'injection pneumatique de carburant dans un moteur deux temps.Thus it is known to use rotary plugs for controlling the pneumatic fuel injection in a two-stroke engine.
Les boisseaux ainsi divulgués ont un axe de rotation situé dans un plan perpendiculaire à l'axe du cylindre, sont percés d'un canal transversal de mise en communication du canal de liaison et de la chambre de combustion et sont reliés à des moyens d'entrainement permettant de les faire tourner en fonction de la vitesse de rotation du vilebrequin du moteur.The bushels thus disclosed have an axis of rotation situated in a plane perpendicular to the axis of the cylinder, are pierced with a transverse channel for bringing the connecting channel and the combustion chamber into communication and are connected to means of drive allowing them to rotate as a function of the rotation speed of the engine crankshaft.
Vis-à-vis des soupapes, de tels boisseaux peuvent donc fonctionner à plus haut régime et permettent une plus grande souplesse dans le réglage de l'injection.Vis-à-vis the valves, such plugs can therefore operate at higher speed and allow greater flexibility in adjusting the injection.
Cependant il subsiste des problèmes d'étanchéité notamment à l'entrée du boisseau.However, there are still sealing problems, especially at the inlet of the plug.
Des dispositifs d'étanchéité sont parfois prévus à cet effet, soit en amont soit en aval de chaque boisseau, soit aux deux endroits.Sealing devices are sometimes provided for this purpose, either upstream or downstream of each plug, or in both places.
La demande de brevet FR 2 559 208 concerne un boisseau de contrôle de l'échappement et/ou de l'admission de gaz de et/ou vers une chambre de combustion sur lequel est appliqué un ou plusieurs organes d'étanchéité. L'amélioration envisagée dans ce brevet consiste en une lubrification et en une réfrigération de la surface de contact entre le ou les organe(s) d'étanchéité et le boisseau.
De par sa sophistication il n'est pas sûr que ce système soit parfaitement fiable notamment au plan de l'étanchéité.Due to its sophistication, it is not certain that this system is perfectly reliable, particularly in terms of sealing.
La présente invention propose un moteur comprenant un boisseau rotatif de conception simple, qui ne nécéssite pas d'organe d'étanchéité supplémentaire et indépendant au niveau de l'admission.The present invention provides an engine comprising a rotary valve of simple design, which does not require an additional and independent sealing member at the intake.
L'étanchéité à l'admission est assurée selon l'invention par la forme et la disposition même du boisseau.The admission tightness is ensured according to the invention by the shape and the very arrangement of the plug.
Ainsi, l'invention concerne un moteur comprenant un boisseau rotatif selon la revendication 1.Thus, the invention relates to an engine comprising a rotary plug according to claim 1.
Préférentiellement, pour chaque canal coopérant ainsi avec un injecteur, la face du canal la plus éloignée de l'axe longitudinal du boisseau s'éloigne dudit axe à partir de l'orifice d'entrée.Preferably, for each channel thus cooperating with an injector, the face of the channel furthest from the longitudinal axis of the plug moves away from said axis from the inlet orifice.
En outre l'un au moins desdits canaux d'écoulement du boisseau peut comporter un moyen de piégeage de carburant.In addition, at least one of said plug flow channels may include a fuel trapping means.
Plus particulièrement ledit moyen de piégeage du carburant consiste en un coude formé par ledit canal et susceptible de retenir ledit carburant sous l'effet de la force centrifuge créée par la rotation du boisseau.More particularly, said fuel trapping means consists of an elbow formed by said channel and capable of retaining said fuel under the effect of the centrifugal force created by the rotation of the plug.
Selon un mode de réalisation de l'invention le boisseau rotatif est destiné à contrôler l'admission d'un mélange air-carburant dans la chambre de combustion d'un moteur à combustion interne.According to one embodiment of the invention, the rotary valve is intended to control the admission of an air-fuel mixture into the combustion chamber of an internal combustion engine.
Selon encore un mode de réalisation de l'invention, le boisseau comporte en outre, à partir d'un certaine distance de son extrémité opposée à la chambre de combustion, deux canaux disposés symétriquement vis-à-vis d'un plan longitudinal.According to yet another embodiment of the invention, the plug further comprises, from a certain distance from its end opposite to the combustion chamber, two channels arranged symmetrically with respect to a longitudinal plane.
De façon particulière, le boisseau peut comporter un canal axial destiné à son refroidissement.In particular, the plug may include an axial channel intended for its cooling.
Comme il a déjà été dit, le boisseau peut être monté dans un moteur monocylindre, placé à l'entrée de la chambre de combustion; Sans sortir du cadre de l'invention plusieurs boisseaux peuvent être montés, chacun dans la culasse d'une chambre de combustion d'un moteur multicylindre. Un unique canal axial de refroidissement traverse alors préférentiellement tous les boisseaux.As already mentioned, the plug can be mounted in a single-cylinder engine, placed at the entrance to the combustion chamber; Without departing from the scope of the invention, several bushels can be mounted, each in the cylinder head of a combustion chamber of a multi-cylinder engine. A single axial cooling channel then preferably passes through all of the bushels.
De plus, un ou plusieurs boisseaux selon l'invention peuvent équiper un moteur de hors bord, leur(s) axe(s) longitudinal pouvant alors être vertical.In addition, one or more bushels according to the invention can be fitted to an outboard motor, their longitudinal axis (s) then being able to be vertical.
D'autres avantages et particularités de l'invention apparaitront mieux à la lecture de la description qui va suivre, faite à titre illustratif et nullement limitatif, en référence aux dessins annexés sur lesquels :
- la figure 1 montre en coupe verticale longitudinale partielle un moteur multi-cylindre équipé de boisseaux selon l'invention;
- la figure 2 montre en coupe longitudinale un mode de réalisation d'un boisseau rotatif selon l'invention;
- la figure 3 est une coupe selon la ligne A-A de la figure 2;
- la figure 4 est une coupe selon la ligne I-I de la figure 2;
- la figure 5 est une coupe selon la ligne II-II de la figure 2;
- la figure 6 est une coupe selon la ligne III-III de la figure 2;
- la figure 7 est une coupe selon la ligne IV-IV de la figure 2 montrant en outre la liaison avec la chambre de combustion.
- Figure 1 shows in partial longitudinal vertical section a multi-cylinder engine fitted with plugs according to the invention;
- Figure 2 shows in longitudinal section an embodiment of a rotary valve according to the invention;
- Figure 3 is a section along the line AA in Figure 2;
- Figure 4 is a section along line II of Figure 2;
- Figure 5 is a section along the line II-II of Figure 2;
- Figure 6 is a section along line III-III of Figure 2;
- Figure 7 is a section along line IV-IV of Figure 2 further showing the connection with the combustion chamber.
La figure 1 permet d'illustrer l'arrangement des boisseaux dans le cas d'un moteur multicylindre. On reconnaît, de façon connue, les cylindres 1 (au nombre de trois dans cet exemple) coiffés chacun par une culasse 2 dont le fond hémisphérique définit la partie supérieure de la chambre de combustion 4 qui est en outre délimitée par les parois du cylindre 1 et par la partie supérieure du piston 5.Figure 1 illustrates the arrangement of plugs in the case of a multi-cylinder engine. We recognize, in known manner, the cylinders 1 (three in number in this example) each capped by a
Au niveau de chaque cylindre au moins un orifice d'injection 3 réalise la communication entre la chambre de combustion 4 et au moins un boisseau rotatif 6 selon l'invention.At each cylinder at least one
Selon cet exemple de réalisation, le boisseau 6 est monté rotatif dans la culasse 2 et commande la distribution d'un mélange d'air comprimé et de carburant dans la chambre de combustion 4 puisqu'il est placé entre l'orifice d'injection 3 et un conduit (non-référencé) d'alimentation en air comprimé.According to this exemplary embodiment, the
Un dispositif d'injection de carburant 7 est préférentiellement placé sur le conduit d'air comprimé, à l'entrée du boisseau 6.A
Selon ce mode de réalisation de l'invention chaque boisseau, de forme générale cylindrique comporte au moins un arbre longitudinal 8 qui dépasse d'un côté au moins et vient en appui sur un roulement 9. Les arbres 8 des différents boisseaux peuvent être mis bout à bout.According to this embodiment of the invention, each bushel, of generally cylindrical shape, comprises at least one
De préférence, chaque arbre 8 est creux ce qui permet d'y faire passer un fluide réfrigérant par exemple, destiné à refroidir l'intérieur dudit boisseau. Cette fonction est importante vu les vitesses de rotation des boisseaux.Preferably, each
Plusieurs boisseaux ainsi mis bout à bout permettent donc de former un canal axial de refroidissement continu d'une extrémité à l'autre des boisseaux.Several bushels thus placed end to end therefore make it possible to form an axial continuous cooling channel from one end to the other of the bushels.
Sans sortir du cadre de l'invention un unique arbre cylindrique 8 peut traverser tous les boisseaux, ou encore des sections d'arbre peuvent être montés de part et d'autre d'un boisseau cylindrique.Without departing from the scope of the invention, a single
La figure 2 montre de façon plus détaillée un boisseau 6 selon l'invention.Figure 2 shows in more detail a
La forme générale du boisseau peut être cylindrique, d'axe longitudinal de rotation 10. Comme il a été dit, un canal axial 11, confondu avec l'axe 10 de rotation du boisseau permet par exemple de faire circuler un liquide de refroidissement à l'intérieur même du boisseau.The general shape of the plug can be cylindrical, with a longitudinal axis of
En outre un canal 12 destiné à l'écoulement d'un mélange air sous pression-carburant par exemple, est prévu à l'intérieur du boisseau.In addition, a
Le canal 12 n'est pas droit, est de préférence de section variable et présente un premièr orifice ou orifice de sortie 121 coopérant avec la chambre de combustion 4 et un deuxième orifice ou orifice d'entrée 122, par lequel est introduit le mélange.L'orifice d'entrée 122 appartient à la surface latérale du boisseau et est placé à une distance non nulle de l'axe 10 de rotation du boisseau tandis que l'orifice de sortie 121 appartient à la surface cylindrique du boisseau tout en étant déporté radialement par rapport à l'orifice d'entrée 122. L'orifice de sortie 121 est de toute façon placé plus loin de l'axe 10 de rotation que l'orifice d'entrée 122.The
Au niveau de l'orifice d'entrée l'axe ou la fibre neutre 123 du canal 12 peut être sensiblement parallèle à l'axe de rotation 10 du boisseau 6.At the level of the inlet orifice, the neutral axis or
De plus, l'injecteur de carburant 7 débouche à proximité de l'orifice d'entrée, à l'intérieur du boisseau. Plus précisément l'injecteur 7 est orienté de telle sorte que l'axe du jet qu'il génère est sensiblement contenu dans le même plan que la face 124 du canal 12 la plus proche de l'axe 10 du boisseau.In addition, the
En outre, la paroi 125 du canal 12 la plus éloignée de l'axe 10 est inclinée de telle sorte qu'elle s'éloigne de l'axe 10 à partir de l'extrémité 122 du boisseau.In addition, the
Les dispositions qui viennent d'être décrites concernent uniquement la zone du canal 12 coopérant directement avec un injecteur 7 et permettent de réaliser une étanchéité interne au boisseau, sans pièce additionelle. En effet les orientations précitées de la paroi et de l'injecteur 7 permettent aux gouttelettes de carburant de frapper la paroi 124 avec un angle faible, donc de les empècher de ressortir du canal 12. En outre la paroi, vu son orientation, permet d'entrainer les gouttelettes plus profondément dans le canal 12. Un film de carburant peut ainsi se former dans cette zone.The arrangements which have just been described relate only to the zone of the
Les figures 3 et 4 aident à mieux appréhender la géométrie du boisseau au niveau de l'orifice d'entrée 122. Sur ces figures on peut voir deux canaux 12 A et 12 B disposés symétriquement par rapport à un plan longitudinal du boisseau. Un nombre plus grand de canaux peut être prévu sans sortir du cadre de l'invention. Chaque canal 12 et chaque injecteur associé 7 devant être préférentiellement disposés comme indiqué ci-dessus. La figure 3 qui illustre la zone dans laquelle pénètre l'injecteur 7 montre le secteur annulaire d'injection tandis que sur la figure 4 apparait le cloisonnement de ce secteur en deux zones 12 A, 12 B à l'origine des deux canaux. Si deux canaux sont prévus , le boisseau tournera alors deux fois moins vite que le moteur dans le cas d'une application à un moteur deux temps.Figures 3 and 4 help to better understand the geometry of the plug at the
En outre, un moyen de piègeage du carburant peut être prévu, selon l'invention, en aval de l'entrée 122.In addition, a fuel trapping means can be provided, according to the invention, downstream of the
Ce moyen peut consister en une double déviation du canal 12 qui s'éloigne puis se rapproche de l'axe 10 du boisseau, formant ainsi une "poche" 126 que la force centrifuge contribue à remplir.This means can consist of a double deflection of the
Les figures 5, 6 et 7 permettent d'illuster le cheminement du canal 12 ou plus précisément des deux canaux 12 A et 12 B prévus selon ce mode de réalisation, en aval de l'entrée 122.FIGS. 5, 6 and 7 illustrate the path of the
Le moyen de piègeage est destiné à compléter et à améliorer l'étanchéité réalisée au niveau de l'entrée 122 du boisseau.The trapping means is intended to complete and improve the seal produced at the level of the
L' extrémité 121 du canal 12 permet une arrivée du mélange dans l'axe de l'orifice 3, ce qui est connu en soi.The
L'entrainement en rotation du boisseau peut être réalisé par tout moyen connu en soi (courroie, chaine, pignons,...) afin que celui-ci soit asservi à la vitesse du moteur où à un sous-multiple de cette vitesse, selon le nombre de canaux prévus.The rotary drive of the bushel can be achieved by any means known per se (belt, chain, sprockets, ...) so that it is controlled by the speed of the motor or a sub-multiple of this speed, depending the number of channels planned.
Il ressort de ce qui précède qu'aucun système d'étanchéité à l'admission indépendant du boisseau n'est nécessaire selon l'invention puisque l'étanchéité est réalisée à l'intérieur même du boisseau, d'où une simplification et une fiabilité accrues.It emerges from the above that no sealing system at the inlet independent of the bushel is necessary according to the invention since the sealing is carried out inside the bushel itself, hence a simplification and a reliability. increased.
En outre, à tout autre moment du cycle que l'admission, le boisseau est capable d'entrainer les particules de carburant vers l'intérieur du canal 12.In addition, at any time during the cycle other than intake, the plug is capable of entraining the fuel particles towards the interior of the
Ainsi les particules de carburant ou d'autre composant lourd du mélange ne peuvent s'accumuler inopinément à l'entrée du boisseau.Thus particles of fuel or other heavy component of the mixture cannot accumulate unexpectedly at the inlet of the plug.
De plus, l'étanchéité est complétée par le moyen de piégeage des particules les plus lourdes du mélange. Ce moyen est avantageusement capable de pièger les particules avant la phase d'admission. Ce moyen permet en effet de retenir le carburant piégé et de l'empècher de sortir vers l'une ou l'autre des extrémités du boisseau tant que l'admission est fermée.In addition, the seal is completed by means of trapping the heaviest particles of the mixture. This means is advantageously capable of trapping the particles before the admission phase. This means makes it possible to retain the trapped fuel and prevent it from going out to one or the other of the ends of the plug as long as the intake is closed.
En revanche, dès que l'extrémité 121 entre en communication avec la chambre de combustion, c'est-à-dire dés le début de l'admission, la variation de pression permet auxdites particules d'être immédiatement réintroduites dans le mélange et pulvérisées vers la chambre de combustion.On the other hand, as soon as the
Dans le cas de moteurs multicylindres, les boisseaux selon l'invention peuvent être alignés comme montré sur la figure 1 ménageant ainsi un long canal axial 11 destiné de préférence au passage d'un fluide de refroidissement. Un seul dispositif d'entraînement en rotation est nécessaire pour tous les boisseaux ainsi montés.In the case of multi-cylinder engines, the plugs according to the invention can be aligned as shown in Figure 1 thus providing a long
Bien que les figures 2 à 7 montrent le cas d'un boisseau traversé par deux canaux 12, il peut être envisagé sans sortir du cadre de l'invention que les deux canaux se rejoignent près de l'extrémité 121 débouchant vers la chambre de combustion. Le ou les boisseaux ont alors la même vitesse de rotation que le moteur.Although Figures 2 to 7 show the case of a plug crossed by two
Comme il a déjà été dit, plus de deux canaux peuvent traverser le boisseau, les vitesses du moteur et du boisseau étant alors mutuellement adaptées.As already mentioned, more than two channels can pass through the plug, the motor and plug speeds being then mutually adapted.
Afin d'améliorer la vitesse du mélange traversant le ou les canaux 12, ceux-ci peuvent en outre présenter la forme d'un convergent-divergent sur leur longueur.In order to improve the speed of the mixture passing through the channel or
Enfin les boisseaux selon l'invention peuvent être réalisés par exemple en aluminium, par moulage.Finally the plugs according to the invention can be made for example of aluminum, by molding.
Claims (11)
- Engine having at least one rotary valve for transferring a fluid between a fluid source and a combustion chamber and at least one injector, the said valve having at least one substantially cylindrical surface, a side wall and at least one flow passage (12) for the said fluid with an inlet orifice (122) and an outlet orifice (121), characterised in that the inlet orifice (122) is arranged in the said side surface of the valve and is located at a distance from the axis (10) of rotation of the valve that is not zero, in that the outlet orifice (121) arranged in the cylindrical surface of the said valve is radially offset from the inlet orifice (1220 and in that at least one injector (7) opens in the vicinity of the said inlet orifice (122) into the interior of the said valve, the said injector being positioned so that the orientation of its axis is close to that of the face (124) of the passage closest to the axis (10) of rotation of the valve.
- Engine as claimed in claim 1, characterised in that for each passage (12) co-operating with an injector (7), the face (125) of the passage farthest away from the axis (10) of rotation of the valve bears further away from the said axis starting from the inlet orifice (122).
- Engine as claimed in any one of claims 1 or 2, characterised in that at least one of the said flow passages (12) of the said valve intrinsically incorporates a means for trapping fuel.
- Engine as claimed in claim 3, characterised in that the said fuel trapping means consists of an elbow (126) formed by the said passage and conducive to retaining the said fuel under the effect of the centrifugal force created by the rotation of the valve.
- Engine as claimed in any one of the previous claims, characterised in that at least one of the said valves also has an axial passage (11) designed for the purpose of the cooling thereof.
- Engine as claimed in any one of the previous claims, characterised in that, starting at a certain distance from its inlet orifice (122), at least one of the said valves has two passages (12 A, 12 B) arranged symmetrically relative to a longitudinal plane.
- Engine as claimed in any one of the previous claims having a pneumatic fuel injection.
- Engine as claimed in any one of the previous claims having a single cylinder.
- Engine as claimed in any one of claims 1 to 7, having several cylinders and having a rotary valve at the inlet of each cylinder.
- Engine as claimed in claim 9, characterised in that a single axial passage (11) crosses through all the rotary valves.
- Engine as claimed in any one of the previous claims of the out-board type.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9109917A FR2679960A1 (en) | 1991-08-02 | 1991-08-02 | Rotary plug and use of the said plug for transferring a fluid to a combustion chamber of an internal combustion engine |
FR9109917 | 1991-08-02 | ||
PCT/FR1992/000757 WO1993003260A1 (en) | 1991-08-02 | 1992-07-31 | Rotary throttle valve and utilisation of said throttle valve for the transfer of a fluid to a combustion chamber of an internal combustion angine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0551504A1 EP0551504A1 (en) | 1993-07-21 |
EP0551504B1 true EP0551504B1 (en) | 1996-10-02 |
Family
ID=9415916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92917739A Expired - Lifetime EP0551504B1 (en) | 1991-08-02 | 1992-07-31 | Rotary throttle valve and utilisation of said throttle valve for the transfer of a fluid to a combustion chamber of an internal combustion angine |
Country Status (7)
Country | Link |
---|---|
US (1) | US5377635A (en) |
EP (1) | EP0551504B1 (en) |
JP (1) | JPH06502708A (en) |
DE (1) | DE69214267T2 (en) |
ES (1) | ES2094926T3 (en) |
FR (1) | FR2679960A1 (en) |
WO (1) | WO1993003260A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2705402B1 (en) * | 1993-05-21 | 1995-07-13 | Inst Francais Du Petrole | Improved rotary valve. |
US5579734A (en) * | 1995-02-13 | 1996-12-03 | Muth; Barry A. | Rotary valve internal combustion engine |
US5816203A (en) * | 1995-02-13 | 1998-10-06 | Muth; Barry A. | Rotary valve internal combustion engine |
US5967108A (en) * | 1996-09-11 | 1999-10-19 | Kutlucinar; Iskender | Rotary valve system |
GB9827394D0 (en) * | 1998-12-11 | 1999-02-03 | Norton Cyril A | Engines |
US6513475B2 (en) | 2001-04-18 | 2003-02-04 | Barry Muth | Rotary valve internal combustion engine |
EP2261470A1 (en) | 2009-06-08 | 2010-12-15 | Léon Crosset | Internal combustion engine with spherical rotary valve |
JP6385407B2 (en) * | 2016-09-22 | 2018-09-05 | 本田技研工業株式会社 | Rotary throttle device for internal combustion engine |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB293650A (en) * | 1928-01-17 | 1928-07-12 | Arthur Lionel Reeves | Improvements in rotary valves for internal-combustion engines |
US2158386A (en) * | 1937-05-28 | 1939-05-16 | Sykes Walter David | Rotary valve for internal combustion engines |
CH334777A (en) * | 1956-01-25 | 1958-12-15 | Monn Walter | Spool distributor device of a four-stroke internal combustion engine cylinder |
US3871340A (en) * | 1972-10-03 | 1975-03-18 | Tetrahedron Associates Inc | Rotary valve internal combustion engine |
US4007725A (en) * | 1975-03-05 | 1977-02-15 | Weaver Robert R | Rotary valving unit for an internal combustion engine |
US4075986A (en) * | 1976-07-12 | 1978-02-28 | Mark Keck | Rotary-poppet valve internal combustion engine |
US4546743A (en) * | 1977-06-20 | 1985-10-15 | Karl Eickmann | Arrangements to rotary valves for engines compressors, motors or pumps |
AU8732582A (en) * | 1981-08-01 | 1983-02-22 | Kinnersly, R.F. | Improvements relating to internal combustion engines and rotary valve members therefor |
US5081966A (en) * | 1984-11-15 | 1992-01-21 | Hansen Engine Corporation | Internal combustion engine with rotary valve assembly |
IT1217060B (en) * | 1987-04-30 | 1990-03-14 | Montagni Alviero | DISTRIBUTION DEVICE FOR ALTERNATIVE VOLUMETRIC MACHINES, SUCH AS ENDOTHERMAL ALTERNATIVE MOTORS WITH ROTATING SOLID-SHAPED VALVE IN SPHERICAL SPECIES. |
CA1292702C (en) * | 1989-06-23 | 1991-12-03 | George Ristin | Rotary valve with facility for stratified combustion in the internal combustionengine |
FR2662214B1 (en) * | 1990-05-21 | 1994-07-22 | Inst Francais Du Petrole | TWO-STROKE ENGINE WITH PNEUMATIC FUEL INJECTION AND WITH INJECTION CONTROL BY A ROTATING BEVERAGE. |
GB9013788D0 (en) * | 1990-06-20 | 1990-08-08 | Lotus Group Plc | Internal combustion engine and an improved rotary inlet valve for use therewith |
US5052349A (en) * | 1990-07-30 | 1991-10-01 | Terry Buelna | Rotary valve for internal combustion engine |
-
1991
- 1991-08-02 FR FR9109917A patent/FR2679960A1/en active Granted
-
1992
- 1992-07-31 WO PCT/FR1992/000757 patent/WO1993003260A1/en active IP Right Grant
- 1992-07-31 EP EP92917739A patent/EP0551504B1/en not_active Expired - Lifetime
- 1992-07-31 US US08/039,116 patent/US5377635A/en not_active Expired - Fee Related
- 1992-07-31 ES ES92917739T patent/ES2094926T3/en not_active Expired - Lifetime
- 1992-07-31 DE DE69214267T patent/DE69214267T2/en not_active Expired - Fee Related
- 1992-07-31 JP JP5503336A patent/JPH06502708A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US5377635A (en) | 1995-01-03 |
EP0551504A1 (en) | 1993-07-21 |
WO1993003260A1 (en) | 1993-02-18 |
FR2679960B1 (en) | 1995-04-28 |
FR2679960A1 (en) | 1993-02-05 |
ES2094926T3 (en) | 1997-02-01 |
DE69214267T2 (en) | 1997-02-20 |
JPH06502708A (en) | 1994-03-24 |
DE69214267D1 (en) | 1996-11-07 |
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