EP1977093A1 - Oil spray lubrication and cooling device for a variable compression ratio engine - Google Patents

Oil spray lubrication and cooling device for a variable compression ratio engine

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Publication number
EP1977093A1
EP1977093A1 EP07730864A EP07730864A EP1977093A1 EP 1977093 A1 EP1977093 A1 EP 1977093A1 EP 07730864 A EP07730864 A EP 07730864A EP 07730864 A EP07730864 A EP 07730864A EP 1977093 A1 EP1977093 A1 EP 1977093A1
Authority
EP
European Patent Office
Prior art keywords
piston
oil
cooling
engine
engine block
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.)
Pending
Application number
EP07730864A
Other languages
German (de)
French (fr)
Inventor
Vianney Rabhi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1977093A1 publication Critical patent/EP1977093A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/047—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft with rack and pinion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through pistons
    • 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
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • 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
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/048—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable crank stroke length

Definitions

  • the present invention relates to a device for cooling the piston and lubricating the gear system of a variable volumetric ratio engine.
  • the mechanical transmission device for a variable volumetric ratio engine comprises at least one cylinder in which a piston moves which is secured in its lower part, a transmission member cooperating on the one hand by means of a small-sized rack with a rolling guide device, and on the other hand by means of another large-sized rack with a toothed wheel integral with a connecting rod, this making it possible to transmit the movement between said piston and said connecting rod.
  • Said mechanical transmission device for a variable volumetric ratio engine also comprises at least one control rack cooperating with the toothed wheel, means for fixing the piston on the transmission member which provide a clamping preload, connection means which enable to stiffen the teeth of the racks, and means for strengthening and lightening the structure of the toothed wheel.
  • the piston of the variable compression ratio engine has a particular shape which differs from that of the pistons of conventional engines.
  • variable compression ratio engines regardless of the mechanical principle, are intended to be supercharged by a turbo compressor or by any other supercharging means in a number of applications. .
  • variable volumetric ratio engine described by the aforementioned patents is also of interest when coupled to a supercharging device: this allows it to deliver a high specific torque and power and to replace an atmospheric conventional engine of higher displacement. This strategy reduces vehicle consumption without reducing performance.
  • One of the problems posed by supercharged engines is the control of the temperature of the pistons which receive a quantity of heat all the higher as the supercharging pressure is high. To remedy this problem, the pistons of supercharged conventional engines are generally cooled by oil injectors which project oil under the cap of said pistons.
  • variable compression ratio engine comprises a gear system for transmitting the power and ensuring its guidance which does not exist in conventional engines.
  • Said gear system consists of the integral transmission member of the engine piston which comprises a rack of large size and which cooperates with the gear wheel, said wheel also cooperating with the control rack.
  • said gear system also consists of small racks which cooperate with small gear wheels fitted to . each of the ends of a synchronized roller, said small racks, said small gears and said synchronized roller forming part of the rolling guide device of the variable volumetric ratio engine.
  • the gear system is for the most part lubricated by the oil mist present in the engine block of the variable volumetric ratio engine when the latter is in operation, said fog being produced in particular by the oil projected in said block. motor by the hydrodynamic bearings of said engine.
  • said oil mist may be insufficient to guarantee the gear system sufficient lubrication, in which case the surfaces of the teeth of said system may use prematurely or be destroyed.
  • the temperature (s) of the piston (s) of the volumetric ratio engine is controlled and always remains below the threshold beyond which a sustainable operation of said piston or pistons is no longer ensured; • The lubrication of the gear system of the volumetric ratio engine is improved so that the durability of the contact surfaces of the different teeth of said system is ensured in accordance with the desired service life for said engine.
  • variable volumetric ratio engine oil cooling and lubricating device comprises at least one injector which is placed in the engine block of said variable volumetric ratio engine so as to project oil onto the engine.
  • least one of the moving components of said motor said movable components being constituted by at least one integral piston in its lower part of a transmission member cooperating on the one hand with a rolling guide device and on the other hand with a toothed wheel, said toothed wheel cooperating on the one hand with a connecting rod connected to a crankshaft and on the other hand opposite the transmission member with another rack called control rack whose vertical position relative to the engine block is controlled by a control device.
  • the cooling and lubricating device comprises at least one injector placed in the engine block which projects oil from the pressure lubrication circuit of the engine.
  • the cooling and lubricating device comprises at least one injector which is placed in the engine block so as to project oil under the cap of at least one piston that comprises the engine with variable volumetric ratio in order to to ensure the cooling of said piston.
  • the cooling and lubricating device comprises at least one injector which is placed in the engine block so as to project oil onto the lower external surface of a bowl arranged in the upper part of the piston crown. to ensure cooling of said bowl.
  • the cooling and lubricating device comprises a piston whose lower outer surface of the bowl arranged in the upper part of the cap comprises at least one oil retaining dam which is constituted by the rim of at least one bucket to retain the oil in contact with the underside of the cap of said piston during accelerations and decelerations made by said piston near its top dead center.
  • the cooling and lubricating device comprises at least one injector which is placed in the engine block so as to project oil into a scoop fitted under the piston of the engine, said scoop forcing said oil to go into an engine. cavity arranged in the central part of said piston.
  • the cooling and lubricating device comprises a piston whose cavity arranged in the central part of said piston has in its upper end a bowl for retaining oil in contact with the underside of the cap of said piston during accelerations and decelerations effected by said piston in the vicinity of its top dead center.
  • the cooling and lubricating device according to the present invention comprises a piston whose cavity arranged in the central part of said piston has in its upper part a distribution chamber which comprises at least one opening opening between the retaining fins of the cap of said piston .
  • the cooling and lubricating device comprises at least one injector placed in the engine block which projects oil into the inlet orifice of at least one gallery arranged in the mass of the piston, said gallery being located in the peripheral portion of said piston and under the cap of said piston.
  • the cooling and lubricating device comprises at least one injector which is placed in the engine block so as to project oil onto at least one transmission member integrally mounted on the lower part of the or each piston of the engine.
  • variable volumetric ratio engine in order to lubricate the rack of large size on the one hand, and to lubricate the teeth of the toothed wheel with which said rack cooperates on the other hand.
  • the cooling and lubricating device comprises at least one injector which is placed in the engine block so as to project oil on at least one control rack of the variable compression ratio engine in order to lubricate the engine. rack of large size on the one hand, and to lubricate the teeth of the toothed wheel with which said rack cooperates on the other hand.
  • the cooling and lubricating device comprises at least one injector which is placed in the engine block so as to project oil onto at least one rolling guiding device that comprises the variable volumetric ratio engine in order to lubricating said rolling guiding device.
  • Figure 1 is a sectional view illustrating a particular embodiment of the cooling and lubricating device according to the present invention.
  • Figures 2 to 4 are views showing a piston for variable volumetric ratio engine provided to cooperate with at least one oil injector which provides cooling of said piston.
  • FIG. 1 shows a nonlimiting exemplary embodiment of the positioning and orientation of at least one injector 701 of the cooling and lubricating device 700 which is placed in the engine block 100 of a variable volumetric ratio engine. to project oil on at least one of the mobile components of said engine, said components being, for some, provided for receiving said oil
  • the engine with variable volumetric ratio comprises for each cylinder 110 made in the engine block 100 a mechanical transmission device 1 comprising moving components which consist of a piston 2 secured in its lower part to a cooperating transmission member 3, on the one hand with a rolling guide device 4, and on the other hand with a gear wheel 5.
  • the toothed wheel 5 cooperates with a connecting rod 6 connected to a crankshaft 9 in order to carry out the transmission of the movement between the piston 2 and said crankshaft 9.
  • the toothed wheel 5 cooperates opposite the transmission member 3 with a toothed rack. 7 whose vertical position relative to the engine block 100 is controlled by a control device 12 comprising a control cylinder 8, the piston cylinder 13 is guided in a cylinder cylinder 112 arranged in the engine block 100.
  • the cylinder cylinder 112 is closed in its upper part by a cylinder head 113 which can be screwed on the engine block 100.
  • the transmission member 3 integral with the piston 2 is provided on one of its faces with a first rack of large dimension 35 whose teeth 34 cooperate with those 51 of the toothed wheel 5.
  • the transmission member 3 comprises, opposite the first rack 35, another rack 37 whose teeth 38 of small dimension cooperate with those of a roller 40 of the rolling guide device 4.
  • the engine block 100 is secured to a support 41 comprising racks 46 ensuring the synchronization of the displacement of the roll 40 with that of the piston 2.
  • the control rack 7 has teeth 74 which cooperate with those 52 of the toothed wheel 5.
  • the cooling and lubricating device 700 comprises at least one injector 701, 712, 713 which is placed in the engine block 100 and which projects oil from the pressure lubrication circuit of the variable volumetric ratio engine.
  • the injector 701 is placed in the engine block 100 so as to project oil under a cap 702 of at least one piston 2 that includes the variable compression ratio engine to ensure the cooling of said piston.
  • the injector can be placed in the engine block 100 so as to project oil on a lower external surface of a bowl 703 arranged in the upper part of the cap 702 of the piston 2 in order to cooling said bowl.
  • the lower outer surface of the bowl 703 arranged in the upper part of the cap 702 of the piston 2 comprises at least one oil retaining dam 704 which is constituted by the rim of at least one trough 705 in order to retain the oil at contact with the underside of the cap 702 of the piston 2 during accelerations and decelerations effected by said piston in the vicinity of its top dead center.
  • the injector 701 is placed in the engine block 100 so as to project oil into at least one scoop 706 arranged under the piston 2 of the engine, said scoop forcing the oil to go into a cavity 707 arranged in the central portion said piston.
  • the cavity 707 formed in the central portion of the piston 2 has in its upper end a bowl 708 for retaining oil in contact with the underside of the cap 702 of said piston during the accelerations and decelerations effected by said piston in the vicinity of its top dead center.
  • the cavity 707 arranged in the central portion of the piston 2 comprises in its upper part a distribution chamber 709 which comprises at least one orifice 710 opening between retaining fins 711 of the cap 702 of said piston.
  • the injector can be placed in the engine block 100 so as to project oil into an inlet orifice 714 of at least one gallery 715 formed in the mass of the piston. 2, said gallery being located in the peripheral portion of said piston and under the cap 702 of said piston.
  • the oil flow of the injector 701 may be subject to the operating conditions of said engine.
  • an injector 713 can be placed in the engine block 100 so as to project oil onto at least one transmission member 3 integrally mounted on the lower part of the or each piston 2 of the volumetric ratio engine. variable, in order to lubricate the teeth 34 of the first rack of large size 35 on the one hand, and to lubricate the teeth 51 of the toothed wheel 5 with which said rack cooperates on the other hand.
  • 100 may be provided for spraying oil on at least one control rack 7 to lubricate the teeth 74 on the one hand, and to lubricate the teeth 52 of the toothed wheel 5 with which cooperates the control rack 7 on the other hand.
  • An oil injector may also be placed in the engine block 100 so as to project oil onto at least one rolling guide device 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention relates to an oil spray lubrication and cooling device for a variable compression ratio engine, including at least one injector (701, 712, 713) which is placed in the engine block (100) of the variable compression ratio engine such as to spray oil onto at least one of the moving components of the engine. The aforementioned moving components include at least one piston (2), the lower part of which is solidly connected to a transmission element (3) that co-operates with a rolling guide device (4) and a toothed wheel (5) which co-operates with (i) a connecting rod (6) which is connected to a crankshaft (9) and (ii) a control rack (7) opposite the transmission element (3). The vertical position of the control rack in relation to the engine block (100) is controlled by a control device (12).

Description

DISPOSITIF DE REFROIDISSEMENT COOLING DEVICE
ET DE LUBRIFICATION PAR PROJECTION D'HUILEAND LUBRICATION BY OIL PROJECTION
POUR MOTEUR A RAPPORT VOLUMETRIQUE VARIABLEFOR MOTOR WITH VARIABLE VOLUMETRIC RATIO
La présente invention a pour objet un dispositif qui permet de refroidir le piston et de lubrifier le système d'engrenage d'un moteur à rapport volumétrique variable.The present invention relates to a device for cooling the piston and lubricating the gear system of a variable volumetric ratio engine.
On connaît, d'après les brevets internationaux WO98/51911 , WO00/31377, WO03/008783 appartenant au demandeur, différents dispositifs mécaniques pour moteur à rapport volumétrique variable.It is known from international patents WO98 / 51911, WO00 / 31377, WO03 / 008783 belonging to the applicant, various mechanical devices for variable volumetric ratio engine.
On remarque que le brevet international WO98/51911 au nom du demandeur décrit un dispositif servant à améliorer le rendement global des moteurs à combustion interne à pistons utilisés à charge et régime variables par adaptation en marche de leur cylindrée effective et/ou de leur rapport volumétrique.Note that the international patent WO98 / 51911 in the name of the applicant describes a device for improving the overall efficiency of piston internal combustion engines used at variable load and speed by adaptation in operation of their effective displacement and / or their volumetric ratio .
On constate que selon les brevets internationaux WO00/31377 et WO03/008783 au nom du demandeur le dispositif de transmission mécanique pour moteur à rapport volumétrique variable comprend au moins un cylindre dans lequel se déplace un piston qui est solidaire, dans sa partie inférieure, d'un organe de transmission coopérant d'une part au moyen d'une crémaillère de faible dimension avec un dispositif de guidage à roulement, et d'autre part au moyen d'une autre crémaillère de forte dimension avec une roue dentée solidaire d'une bielle, ceci permettant de réaliser la transmission du mouvement entre ledit piston et ladite bielle.It can be seen that, according to the international patents WO00 / 31377 and WO03 / 008783 in the name of the applicant, the mechanical transmission device for a variable volumetric ratio engine comprises at least one cylinder in which a piston moves which is secured in its lower part, a transmission member cooperating on the one hand by means of a small-sized rack with a rolling guide device, and on the other hand by means of another large-sized rack with a toothed wheel integral with a connecting rod, this making it possible to transmit the movement between said piston and said connecting rod.
Ledit dispositif de transmission mécanique pour moteur à rapport volumétrique variable comprend également au moins une crémaillère de commande coopérant avec la roue dentée, des moyens de fixation du piston sur l'organe de transmission qui offrent une précontrainte de serrage, des moyens de liaison qui permettent de rigidifier les dents des crémaillères, et des moyens de renforcement et d'allégement de la structure de la roue dentée. On note que le piston du moteur à rapport volumétrique variable possède une forme particulière qui diffère de celle des pistons des moteurs conventionnels.Said mechanical transmission device for a variable volumetric ratio engine also comprises at least one control rack cooperating with the toothed wheel, means for fixing the piston on the transmission member which provide a clamping preload, connection means which enable to stiffen the teeth of the racks, and means for strengthening and lightening the structure of the toothed wheel. It should be noted that the piston of the variable compression ratio engine has a particular shape which differs from that of the pistons of conventional engines.
Il est connu de l'homme de l'art que les moteurs à rapport volumétrique variable, quel qu'en soit le principe mécanique, sont destinés à être suralimentés par un turbo compresseur ou par tout autre moyen de suralimentation dans bon nombre d'applications.It is known to those skilled in the art that variable compression ratio engines, regardless of the mechanical principle, are intended to be supercharged by a turbo compressor or by any other supercharging means in a number of applications. .
Le moteur à rapport volumétrique variable décrit par les brevets précités trouve également tout son intérêt lorsqu'il est couplé à un dispositif de suralimentation : cela lui permet de délivrer un couple et une puissance spécifiques élevés et de remplacer un moteur conventionnel atmosphérique de cylindrée supérieure. Cette stratégie permet de réduire la consommation des véhicules sans en réduire les performances. L'un des problèmes posés par les moteurs suralimentés est la maîtrise de la température des pistons qui reçoivent une quantité de chaleur d'autant plus élevée que la pression de suralimentation est élevée. Pour remédier à ce problème, les pistons des moteurs conventionnels suralimentés sont en général refroidis par des injecteurs d'huile qui projettent de l'huile sous la calotte desdits pistons.The variable volumetric ratio engine described by the aforementioned patents is also of interest when coupled to a supercharging device: this allows it to deliver a high specific torque and power and to replace an atmospheric conventional engine of higher displacement. This strategy reduces vehicle consumption without reducing performance. One of the problems posed by supercharged engines is the control of the temperature of the pistons which receive a quantity of heat all the higher as the supercharging pressure is high. To remedy this problem, the pistons of supercharged conventional engines are generally cooled by oil injectors which project oil under the cap of said pistons.
On note qu'aucun des brevets appartenant au demandeur ne fait état d'un dispositif destiné à refroidir le ou les piston(s) du moteur à rapport volumétrique variable, pourtant, en l'absence d'un tel dispositif, ledit ou lesdits piston(s) dudit moteur encour(en)t le risque d'atteindre une température de fonctionnement trop élevée pouvant conduire à leur destruction.It is noted that none of the patents belonging to the applicant discloses a device for cooling the piston (s) of the variable volumetric ratio engine, however, in the absence of such a device, said piston or piston (s) said engine is (en) t the risk of reaching an operating temperature too high that can lead to their destruction.
On observe également que le moteur à rapport volumétrique variable comporte un système d'engrenage pour transmettre la puissance et assurer son guidage qui n'existe pas dans les moteurs conventionnels. Ledit système d'engrenage est constitué de l'organe de transmission solidaire du piston du moteur qui comporte une crémaillère de forte dimension et qui coopère avec la roue dentée, ladite roue coopérant également avec la crémaillère de commande.It is also observed that the variable compression ratio engine comprises a gear system for transmitting the power and ensuring its guidance which does not exist in conventional engines. Said gear system consists of the integral transmission member of the engine piston which comprises a rack of large size and which cooperates with the gear wheel, said wheel also cooperating with the control rack.
On note aussi que ledit système d'engrenage est également constitué de crémaillères de petite dimension qui coopèrent avec des petites roues dentées aménagées à. chacune des extrémités d'un rouleau synchronisé, lesdites crémaillères de petite dimension, lesdites petites roues dentées et ledit rouleau synchronisé faisant partie du dispositif de guidage à roulement du moteur à rapport volumétrique variable.It is also noted that said gear system also consists of small racks which cooperate with small gear wheels fitted to . each of the ends of a synchronized roller, said small racks, said small gears and said synchronized roller forming part of the rolling guide device of the variable volumetric ratio engine.
On constate que le système d'engrenage est en majeure partie lubrifiée par le brouillard d'huile présent dans le bloc moteur du moteur à rapport volumétrique variable lorsque ce dernier est en fonctionnement, ledit brouillard étant produit notamment par l'huile projetée dans ledit bloc moteur par les paliers hydrodynamiques dudit moteur.It can be seen that the gear system is for the most part lubricated by the oil mist present in the engine block of the variable volumetric ratio engine when the latter is in operation, said fog being produced in particular by the oil projected in said block. motor by the hydrodynamic bearings of said engine.
Cependant, selon la configuration géométrique du bloc moteur du moteur à rapport volumétrique variable, ledit brouillard d'huile peut s'avérer insuffisant pour garantir au système d'engrenage une lubrification suffisante, en ce cas, les surfaces des dents dudit système peuvent s'user prématurément ou être détruites.However, depending on the geometric configuration of the engine block of the variable compression ratio engine, said oil mist may be insufficient to guarantee the gear system sufficient lubrication, in which case the surfaces of the teeth of said system may use prematurely or be destroyed.
C'est pour maîtriser la température du ou des piston(s) du moteur à rapport volumétrique variable et éviter la destruction desdits pistons d'une part, et pour garantir au système d'engrenage dudit moteur une lubrification appropriée d'autre part, que le dispositif de refroidissement et de lubrification par projection d'huile pour moteur à rapport volumétrique variable suivant l'invention se distingue de l'art antérieur en ce que, selon un mode particulier de réalisation :This is to control the temperature of the piston (s) of the variable compression ratio engine and prevent the destruction of said pistons on the one hand, and to guarantee the gear system of said engine proper lubrication on the other hand, that the device for cooling and lubricating by projection of oil for variable volumetric ratio engine according to the invention differs from the prior art in that, according to a particular embodiment:
• La température du ou des piston(s) du moteur à rapport volumétrique est maîtrisée et reste toujours en deçà du seuil au-delà duquel un fonctionnement durable dudit ou desdits pistons n'est plus assuré ; • La lubrification du système d'engrenage du moteur à rapport volumétrique est améliorée de sorte que la pérennité des surfaces de contact des différentes dents dudit système soit assurée conformément à la durée de vie recherchée pour ledit moteur.• The temperature (s) of the piston (s) of the volumetric ratio engine is controlled and always remains below the threshold beyond which a sustainable operation of said piston or pistons is no longer ensured; • The lubrication of the gear system of the volumetric ratio engine is improved so that the durability of the contact surfaces of the different teeth of said system is ensured in accordance with the desired service life for said engine.
Le dispositif de refroidissement et de lubrification par projection d'huile pour moteur à rapport volumétrique variable suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur dudit moteur à rapport volumétrique variable de manière à projeter de l'huile sur au moins un des composants mobiles dudit moteur, lesdits composants mobiles étant constitués au moins d'un piston solidaire dans sa partie inférieure d'un organe de transmission coopérant, d'une part avec un dispositif de guidage à roulement, et d'autre part avec une roue dentée, ladite la roue dentée coopérant d'une part avec une bielle reliée à un vilebrequin et d'autre part à l'opposé de l'organe de transmission avec une autre crémaillère dite crémaillère de commande dont la position verticale par rapport au bloc moteur est pilotée par un dispositif de contrôle.The variable volumetric ratio engine oil cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block of said variable volumetric ratio engine so as to project oil onto the engine. least one of the moving components of said motor, said movable components being constituted by at least one integral piston in its lower part of a transmission member cooperating on the one hand with a rolling guide device and on the other hand with a toothed wheel, said toothed wheel cooperating on the one hand with a connecting rod connected to a crankshaft and on the other hand opposite the transmission member with another rack called control rack whose vertical position relative to the engine block is controlled by a control device.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur placé dans le bloc moteur qui projette de l'huile provenant du circuit de lubrification sous pression du moteur.The cooling and lubricating device according to the present invention comprises at least one injector placed in the engine block which projects oil from the pressure lubrication circuit of the engine.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur de manière à projeter de l'huile sous la calotte d'au moins un piston que comporte le moteur à rapport volumétrique variable afin d'assurer le refroidissement dudit piston.The cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block so as to project oil under the cap of at least one piston that comprises the engine with variable volumetric ratio in order to to ensure the cooling of said piston.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur de manière à projeter de l'huile sur la surface externe inférieure d'un bol aménagé dans la partie supérieure de la calotte du piston afin d'assurer le refroidissement dudit bol.The cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block so as to project oil onto the lower external surface of a bowl arranged in the upper part of the piston crown. to ensure cooling of said bowl.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend un piston dont la surface externe inférieure du bol aménagé dans la partie supérieure de la calotte comporte au moins un barrage de retenue d'huile qui est constitué par le rebord d'au moins un auget afin de retenir l'huile au contact avec le dessous de la calotte dudit piston lors des accélérations et décélérations qu'effectue ledit piston au voisinage de son point mort haut.The cooling and lubricating device according to the present invention comprises a piston whose lower outer surface of the bowl arranged in the upper part of the cap comprises at least one oil retaining dam which is constituted by the rim of at least one bucket to retain the oil in contact with the underside of the cap of said piston during accelerations and decelerations made by said piston near its top dead center.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur de manière à projeter de l'huile dans une écope aménagée sous le piston du moteur, ladite écope forçant ladite huile à aller dans une cavité aménagée dans la partie centrale dudit piston. Le dispositif de refroidissement et de lubrification suivant la présente invention comprend un piston dont la cavité aménagée dans la partie centrale dudit piston comporte dans son extrémité supérieure une cuvette afin de retenir de l'huile en contact avec le dessous de la calotte dudit piston lors des accélérations et décélérations qu'effectue ledit piston au voisinage de son point mort haut. Le dispositif de refroidissement et de lubrification suivant la présente invention comprend un piston dont la cavité aménagée dans la partie centrale dudit piston comporte dans sa partie supérieure une chambre de répartition qui comprend au moins un orifice débouchant entre les ailettes de soutènement de la calotte dudit piston.The cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block so as to project oil into a scoop fitted under the piston of the engine, said scoop forcing said oil to go into an engine. cavity arranged in the central part of said piston. The cooling and lubricating device according to the present invention comprises a piston whose cavity arranged in the central part of said piston has in its upper end a bowl for retaining oil in contact with the underside of the cap of said piston during accelerations and decelerations effected by said piston in the vicinity of its top dead center. The cooling and lubricating device according to the present invention comprises a piston whose cavity arranged in the central part of said piston has in its upper part a distribution chamber which comprises at least one opening opening between the retaining fins of the cap of said piston .
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur placé dans le bloc moteur qui projette de l'huile dans l'orifice d'entrée d'au moins une galerie aménagée dans la masse du piston, ladite galerie étant située dans la partie périphérique dudit piston et sous la calotte dudit piston.The cooling and lubricating device according to the present invention comprises at least one injector placed in the engine block which projects oil into the inlet orifice of at least one gallery arranged in the mass of the piston, said gallery being located in the peripheral portion of said piston and under the cap of said piston.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur de manière à projeter de l'huile sur au moins un organe de transmission monté solidairement de la partie inférieure du ou de chaque piston du moteur à rapport volumétrique variable, afin d'en lubrifier la crémaillère de forte dimension d'une part, et afin de lubrifier les dents de la roue dentée avec laquelle coopère ladite crémaillère d'autre part.The cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block so as to project oil onto at least one transmission member integrally mounted on the lower part of the or each piston of the engine. variable volumetric ratio engine, in order to lubricate the rack of large size on the one hand, and to lubricate the teeth of the toothed wheel with which said rack cooperates on the other hand.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur de manière à projeter de l'huile sur au moins une crémaillère de commande du moteur à rapport volumétrique variable afin d'en lubrifier la crémaillère de forte dimension d'une part, et afin de lubrifier les dents de la roue dentée avec laquelle coopère ladite crémaillère d'autre part.The cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block so as to project oil on at least one control rack of the variable compression ratio engine in order to lubricate the engine. rack of large size on the one hand, and to lubricate the teeth of the toothed wheel with which said rack cooperates on the other hand.
Le dispositif de refroidissement et de lubrification suivant la présente invention comprend au moins un injecteur qui est placé dans le bloc moteur de manière à projeter de l'huile sur au moins un dispositif de guidage à roulement que comporte le moteur à rapport volumétrique variable afin de lubrifier ledit dispositif de guidage à roulement.The cooling and lubricating device according to the present invention comprises at least one injector which is placed in the engine block so as to project oil onto at least one rolling guiding device that comprises the variable volumetric ratio engine in order to lubricating said rolling guiding device.
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :The following description with reference to the accompanying drawings, given by way of non-limiting examples, will provide a better understanding of the invention, the characteristics it has and the advantages that it is likely to provide:
Figure 1 est une vue en coupe illustrant un mode particulier de réalisation du dispositif de refroidissement et de lubrification suivant la présente invention.Figure 1 is a sectional view illustrating a particular embodiment of the cooling and lubricating device according to the present invention.
Figures 2 à 4 sont des vues montrant un piston pour moteur à rapport volumétrique variable prévu pour coopérer avec au moins un injecteur d'huile qui assure le refroidissement dudit piston.Figures 2 to 4 are views showing a piston for variable volumetric ratio engine provided to cooperate with at least one oil injector which provides cooling of said piston.
On a montré en figure 1 un exemple de réalisation non limitatif du positionnement et de l'orientation d'au moins un injecteur 701 du dispositif de refroidissement et de lubrification 700 qui est placé dans le bloc moteur 100 d'un moteur à rapport volumétrique variable de manière à projeter de l'huile sur au moins un des composants mobiles dudit moteur, lesdits composants étant, pour certains, prévus pour recevoir ladite huileFIG. 1 shows a nonlimiting exemplary embodiment of the positioning and orientation of at least one injector 701 of the cooling and lubricating device 700 which is placed in the engine block 100 of a variable volumetric ratio engine. to project oil on at least one of the mobile components of said engine, said components being, for some, provided for receiving said oil
Le moteur à rapport volumétrique variable comporte pour chaque cylindre 110 réalisé dans le bloc moteur 100 un dispositif de transmission mécanique 1 comportant des composants mobiles qui sont constitués d'un piston 2 solidaire dans sa partie inférieure d'un organe de transmission 3 coopérant, d'une part avec un dispositif de guidage à roulement 4, et d'autre part avec une roue dentée 5.The engine with variable volumetric ratio comprises for each cylinder 110 made in the engine block 100 a mechanical transmission device 1 comprising moving components which consist of a piston 2 secured in its lower part to a cooperating transmission member 3, on the one hand with a rolling guide device 4, and on the other hand with a gear wheel 5.
La roue dentée 5 coopère avec une bielle 6 reliée à un vilebrequin 9 afin de réaliser la transmission du mouvement entre le piston 2 et ledit vilebrequin 9. La roue dentée 5 coopère à l'opposé de l'organe de transmission 3 avec une crémaillère de commande 7 dont la position verticale par rapport au bloc moteur 100 est pilotée par un dispositif de contrôle 12 comportant un vérin de commande 8, dont le piston de vérin 13 est guidé dans un cylindre de vérin 112 aménagé dans le bloc moteur 100. Le cylindre de vérin 112 est fermé dans sa partie supérieure par une culasse de vérin 113 qui peut être vissée sur le bloc moteur 100.The toothed wheel 5 cooperates with a connecting rod 6 connected to a crankshaft 9 in order to carry out the transmission of the movement between the piston 2 and said crankshaft 9. The toothed wheel 5 cooperates opposite the transmission member 3 with a toothed rack. 7 whose vertical position relative to the engine block 100 is controlled by a control device 12 comprising a control cylinder 8, the piston cylinder 13 is guided in a cylinder cylinder 112 arranged in the engine block 100. The cylinder cylinder 112 is closed in its upper part by a cylinder head 113 which can be screwed on the engine block 100.
L'organe de transmission 3 solidaire du piston 2 est pourvu sur l'une de ses faces d'une première crémaillère de forte dimension 35 dont les dents 34 coopèrent avec celles 51 de la roue dentée 5. L'organe de transmission 3 comporte, à l'opposé de la première crémaillère 35, une autre crémaillère 37 dont les dents 38 de faible dimension coopèrent avec celles d'un rouleau 40 du dispositif de guidage à roulement 4.The transmission member 3 integral with the piston 2 is provided on one of its faces with a first rack of large dimension 35 whose teeth 34 cooperate with those 51 of the toothed wheel 5. The transmission member 3 comprises, opposite the first rack 35, another rack 37 whose teeth 38 of small dimension cooperate with those of a roller 40 of the rolling guide device 4.
Le bloc moteur 100 est solidaire d'un support 41 comportant des crémaillères 46 assurant la synchronisation du déplacement du rouleau 40 avec celui du piston 2.The engine block 100 is secured to a support 41 comprising racks 46 ensuring the synchronization of the displacement of the roll 40 with that of the piston 2.
La crémaillère de commande 7, dont la position verticale par rapport au bloc moteur 100, est pilotée par un dispositif de contrôle 12 comportant un vérin de commande 8 qui est constitué d'une tige supérieure de vérin 10, d'une tige inférieure de vérin 16, d'un piston de vérin 13 et d'une tige de contrôle 20.The control rack 7, whose vertical position relative to the engine block 100, is controlled by a control device 12 comprising a control cylinder 8 which consists of an upper cylinder rod 10, a lower cylinder rod 16, a piston cylinder 13 and a control rod 20.
La crémaillère de commande 7 comporte des dents 74 qui coopèrent avec celles 52 de la roue dentée 5.The control rack 7 has teeth 74 which cooperate with those 52 of the toothed wheel 5.
Le dispositif de refroidissement et de lubrification 700 comprend au moins un injecteur 701 , 712, 713 qui est placé dans le bloc moteur 100 et qui projette de l'huile provenant du circuit de lubrification sous pression du moteur à rapport volumétrique variable.The cooling and lubricating device 700 comprises at least one injector 701, 712, 713 which is placed in the engine block 100 and which projects oil from the pressure lubrication circuit of the variable volumetric ratio engine.
L'injecteur 701 est placé dans le bloc moteur 100 de manière à projeter de l'huile sous une calotte 702 d'au moins un piston 2 que comporte le moteur à rapport volumétrique variable afin d'assurer le refroidissement dudit piston. Selon un autre mode de réalisation l'injecteur peut être placé dans le bloc moteur 100 de manière à projeter de l'huile sur une surface externe inférieure d'un bol 703 aménagé dans la partie supérieure de la calotte 702 du piston 2 afin d'assurer le refroidissement dudit bol.The injector 701 is placed in the engine block 100 so as to project oil under a cap 702 of at least one piston 2 that includes the variable compression ratio engine to ensure the cooling of said piston. According to another embodiment the injector can be placed in the engine block 100 so as to project oil on a lower external surface of a bowl 703 arranged in the upper part of the cap 702 of the piston 2 in order to cooling said bowl.
La surface externe inférieure du bol 703 aménagé dans la partie supérieure de la calotte 702 du piston 2 comporte au moins un barrage de retenue d'huile 704 qui est constitué par le rebord d'au moins un auget 705 afin de retenir l'huile au contact avec le dessous de la calotte 702 du piston 2 lors des accélérations et décélérations qu'effectue ledit piston au voisinage de son point mort haut.The lower outer surface of the bowl 703 arranged in the upper part of the cap 702 of the piston 2 comprises at least one oil retaining dam 704 which is constituted by the rim of at least one trough 705 in order to retain the oil at contact with the underside of the cap 702 of the piston 2 during accelerations and decelerations effected by said piston in the vicinity of its top dead center.
L'injecteur 701 est placé dans le bloc moteur 100 de manière à projeter de l'huile dans au moins une écope 706 aménagée sous le piston 2 du moteur, ladite écope forçant l'huile à aller dans une cavité 707 aménagée dans la partie centrale dudit piston.The injector 701 is placed in the engine block 100 so as to project oil into at least one scoop 706 arranged under the piston 2 of the engine, said scoop forcing the oil to go into a cavity 707 arranged in the central portion said piston.
La cavité 707 aménagée dans la partie centrale du piston 2 comporte dans son extrémité supérieure une cuvette 708 afin de retenir de l'huile en contact avec le dessous de la calotte 702 dudit piston lors des accélérations et décélérations qu'effectue ledit piston au voisinage de son point mort haut.The cavity 707 formed in the central portion of the piston 2 has in its upper end a bowl 708 for retaining oil in contact with the underside of the cap 702 of said piston during the accelerations and decelerations effected by said piston in the vicinity of its top dead center.
La cavité 707 aménagée dans la partie centrale du piston 2 comporte dans sa partie supérieure une chambre de répartition 709 qui comprend au moins un orifice 710 débouchant entre des ailettes de soutènement 711 de la calotte 702 dudit piston.The cavity 707 arranged in the central portion of the piston 2 comprises in its upper part a distribution chamber 709 which comprises at least one orifice 710 opening between retaining fins 711 of the cap 702 of said piston.
Selon un autre mode de réalisation illustré en figure 4, l'injecteur peut être placé dans le bloc moteur 100 de manière à projeter de l'huile dans un orifice d'entrée 714 d'au moins une galerie 715 aménagée dans la masse du piston 2, ladite galerie étant située dans la partie périphérique dudit piston et sous la calotte 702 dudit piston.According to another embodiment illustrated in FIG. 4, the injector can be placed in the engine block 100 so as to project oil into an inlet orifice 714 of at least one gallery 715 formed in the mass of the piston. 2, said gallery being located in the peripheral portion of said piston and under the cap 702 of said piston.
On note qu'après avoir refroidi le piston 2, une partie de l'huile projetée sous ledit piston 2 par l'injecteur 701 vient ensuite, lorsqu'elle redescend par gravité dans le carter d'huile de lubrification du moteur, lubrifier le dispositif de transmission mécanique 1 et plus particulièrement les composants mobiles constitués par l'organe de transmission 3, le dispositif de guidage à roulement 4, et la roue dentée 5. Selon un mode particulier de réalisation, le débit d'huile de l'injecteur 701 peut être asservi aux conditions de fonctionnement dudit moteur.It is noted that after cooling the piston 2, a part of the oil projected under said piston 2 by the injector 701 then comes, when it falls down by gravity into the engine lubricating oil sump, lubricate the device mechanical transmission 1 and more particularly the mobile components constituted by the transmission member 3, the rolling guide device 4, and the toothed wheel 5. According to a particular embodiment, the oil flow of the injector 701 may be subject to the operating conditions of said engine.
Selon un autre mode de réalisation un injecteur 713 peut être placé dans le bloc moteur 100 de sorte à projeter de l'huile sur au moins un organe de transmission 3 monté solidairement de la partie inférieure du ou de chaque piston 2 du moteur à rapport volumétrique variable, afin d'en lubrifier les dents 34 de la première crémaillère de forte dimension 35 d'une part, et afin de lubrifier les dents 51 de Ia roue dentée 5 avec laquelle coopère ladite crémaillère d'autre part.According to another embodiment, an injector 713 can be placed in the engine block 100 so as to project oil onto at least one transmission member 3 integrally mounted on the lower part of the or each piston 2 of the volumetric ratio engine. variable, in order to lubricate the teeth 34 of the first rack of large size 35 on the one hand, and to lubricate the teeth 51 of the toothed wheel 5 with which said rack cooperates on the other hand.
Selon un autre mode de réalisation un injecteur 712 placé dans le bloc moteurAccording to another embodiment an injector 712 placed in the engine block
100 peut être prévu pour projeter de l'huile sur au moins une crémaillère de commande 7 afin d'en lubrifier les dents 74 d'une part, et afin de lubrifier les dents 52 de la roue dentée 5 avec laquelle coopère la crémaillère de commande 7 d'autre part.100 may be provided for spraying oil on at least one control rack 7 to lubricate the teeth 74 on the one hand, and to lubricate the teeth 52 of the toothed wheel 5 with which cooperates the control rack 7 on the other hand.
Un injecteur d'huile peut aussi être placé dans le bloc moteur 100 de manière à projeter de l'huile sur au moins un dispositif de guidage à roulement 4.An oil injector may also be placed in the engine block 100 so as to project oil onto at least one rolling guide device 4.
Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tout autre équivalent. It must also be understood that the foregoing description has been given by way of example only and that it in no way limits the scope of the invention which could not be overcome by replacing the execution details described. by any other equivalent.

Claims

REVENDICATIONS
1. Dispositif de refroidissement et de lubrification par projection d'huile pour moteur à rapport volumétrique variable, caractérisé en ce qu'il comprend au moins un injecteur d'huile (701 , 712, 713) qui est placé dans le bloc moteur (100) dudit moteur à rapport volumétrique variable de manière à projeter de l'huile sur au moins un des composants mobiles dudit moteur, lesdits composants mobiles étant constitués au moins d'un piston (2) solidaire dans sa partie inférieure d'un organe de transmission (3) coopérant avec un dispositif de guidage à roulement (4) et une roue dentée (5), ladite la roue dentée (5) coopérant d'une part avec une bielle (6) reliée à un vilebrequin (9) et d'autre part à l'opposé de l'organe de transmission (3) avec une crémaillère de commande (7) dont la position verticale par rapport au bloc moteur (100) est pilotée par un dispositif de contrôle (12).A device for cooling and lubricating by oil spraying for a variable volumetric ratio engine, characterized in that it comprises at least one oil injector (701, 712, 713) which is placed in the engine block (100 ) of said variable volumetric ratio engine so as to project oil on at least one of the moving components of said engine, said movable components being constituted by at least one piston (2) integral in its lower part with a transmission member (3) cooperating with a rolling guide device (4) and a toothed wheel (5), said gear wheel (5) cooperating on the one hand with a connecting rod (6) connected to a crankshaft (9) and on the other hand opposite the transmission member (3) with a control rack (7) whose vertical position relative to the engine block (100) is controlled by a control device (12).
2. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce qu'il comprend au moins un injecteur d'huile (701 ) qui est placé dans le bloc moteur (100) et qui projette de l'huile provenant du circuit de lubrification sous pression du moteur.2. Cooling and lubricating device according to claim 1, characterized in that it comprises at least one oil injector (701) which is placed in the engine block (100) and which projects oil from the circuit lubrication under pressure of the engine.
3. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce que l'injecteur d'huile est placé dans le bloc moteur (100) de manière à projeter de l'huile sous une calotte (702) d'au moins un piston (2) que comporte le moteur à rapport volumétrique variable afin d'assurer le refroidissement dudit piston.Cooling and lubricating device according to Claim 1, characterized in that the oil injector is placed in the engine block (100) so as to project oil under a cap (702) of at least a piston (2) that includes the variable volumetric ratio engine for cooling said piston.
4. Dispositif de refroidissement et de lubrification suivant la revendication 3, caractérisé en ce que l'injecteur d'huile est placé dans le bloc moteur (100) de manière à projeter de l'huile sur la surface externe inférieure d'un bol (703) aménagé dans la partie supérieure de la calotte (702) du piston (2) afin d'assurer le refroidissement dudit bol.Cooling and lubricating device according to Claim 3, characterized in that the oil injector is placed in the engine block (100) so as to spray oil onto the lower outer surface of a bowl ( 703) arranged in the upper part of the cap (702) of the piston (2) for cooling said bowl.
5. Dispositif de refroidissement et de lubrification suivant les revendications 1 et 4, caractérisé en ce que la surface externe inférieure du bol (703) aménagé, dans la partie supérieure de la calotte (702) du piston (2), comporte au moins un barrage de retenue d'huile (704) qui est constitué par le rebord d'au moins un auget (705) qui retient de l'huile au contact avec le dessous de la calotte (702) dudit piston lors des accélérations et décélérations qu'effectue ledit piston au voisinage de son point mort haut.5. A cooling and lubricating device according to claims 1 and 4, characterized in that the lower outer surface of the bowl (703) arranged in the upper part of the cap (702) of the piston (2) comprises at least one oil retaining dam (704) which is constituted by the rim of at least one bucket (705) which retains oil in contact with the underside of the cap (702) of said piston during accelerations and decelerations that performs said piston in the vicinity of its top dead center.
6. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce que l'injecteur d'huile (701 ) est placé dans le bloc moteur (100) de manière à projeter de l'huile dans au moins une écope (706) aménagée sous le piston (2) du moteur, ladite écope forçant ladite huile à aller dans une cavité (707) aménagée dans la partie centrale dudit piston. Cooling and lubricating device according to Claim 1, characterized in that the oil injector (701) is placed in the engine block (100) so as to project oil into at least one scoop (706). ) arranged under the piston (2) of the engine, said scoop forcing said oil to go into a cavity (707) arranged in the central portion of said piston.
7. Dispositif de refroidissement et de lubrification suivant la revendication 6, caractérisé en ce que la cavité (707) aménagée dans la partie centrale du piston (2) comporte, dans son extrémité supérieure, une cuvette (708) afin de retenir de l'huile en contact avec le dessous de la calotte (702) dudit piston lors des accélérations et décélérations qu'effectue ledit piston au voisinage de son point mort haut.Cooling and lubricating device according to claim 6, characterized in that the cavity (707) arranged in the central portion of the piston (2) comprises, in its upper end, a bowl (708) for retaining the oil in contact with the underside of the cap (702) of said piston during accelerations and decelerations effected by said piston in the vicinity of its top dead center.
8. Dispositif de refroidissement et de lubrification suivant la revendication 6, caractérisé en ce que la cavité (707) aménagée dans la partie centrale du piston (2) comporte, dans sa partie supérieure, une chambre de répartition8. Cooling and lubricating device according to claim 6, characterized in that the cavity (707) arranged in the central portion of the piston (2) comprises, in its upper part, a distribution chamber
(709) qui comprend au moins un orifice (710) débouchant entre les ailettes de soutènement (711 ) de la calotte (702) dudit piston.(709) which comprises at least one orifice (710) opening between the retaining fins (711) of the cap (702) of said piston.
9. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce que i'injecteur d'huile est placé dans le bloc moteur (100) de manière à projeter de l'huile dans l'orifice d'entrée (714) d'au moins une galerie (715) aménagée dans la masse du piston (2), ladite galerie étant située dans la partie périphérique dudit piston et sous la calotte (702) dudit piston. 9. Cooling and lubricating device according to claim 1, characterized in that the oil injector is placed in the engine block (100) so as to project oil into the inlet port (714). at least one gallery (715) arranged in the mass of the piston (2), said gallery being located in the peripheral portion of said piston and under the cap (702) of said piston.
10. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce que I'injecteur d'huile (713) est placé dans le bloc moteur (100) de manière à projeter de l'huile sur au moins un organe de transmission (3) monté solidairement de la partie inférieure du ou de chaque piston (2) du moteur à rapport volumétrique variable, afin d'en lubrifier la crémaillère de forte dimension (35) d'une part, et afin de lubrifier les dents (51) de la roue dentéeCooling and lubricating device according to Claim 1, characterized in that the oil injector (713) is placed in the engine block (100) so as to spray oil onto at least one transmission member. (3) integrally mounted to the lower portion of the or each piston (2) of the variable volumetric ratio engine, for lubricating the rack of large size (35) on the one hand, and for lubricating the teeth (51); ) of the toothed wheel
(5) avec laquelle coopère ladite crémaillère d'autre part.(5) with which said rack cooperates on the other hand.
11. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce que I'injecteur d'huile (712) est placé dans le bloc moteur (100) de manière à projeter de l'huile sur au moins une crémaillère de commande (7) du moteur à rapport volumétrique variable afin d'en lubrifier les dents (74) d'une part, et afin de lubrifier les dents (52) de la roue dentée (5) avec laquelle coopère ladite crémaillère d'autre part. Cooling and lubricating device according to Claim 1, characterized in that the oil injector (712) is placed in the engine block (100) so as to spray oil onto at least one control rack (7) of the variable compression ratio engine to lubricate the teeth (74) on the one hand, and to lubricate the teeth (52) of the toothed wheel (5) with which said rack cooperates on the other hand.
12. Dispositif de refroidissement et de lubrification suivant la revendication 1 , caractérisé en ce que i'injecteur d'huile est placé dans le bloc moteur (100) de manière à projeter de l'huile sur au moins un dispositif de guidage à roulement (4). Cooling and lubricating device according to Claim 1, characterized in that the oil injector is placed in the engine block (100) so as to spray oil onto at least one rolling guide device ( 4).
EP07730864A 2006-01-26 2007-01-26 Oil spray lubrication and cooling device for a variable compression ratio engine Pending EP1977093A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0600713A FR2896535B1 (en) 2006-01-26 2006-01-26 OIL PROJECTION COOLING AND LUBRICATION DEVICE FOR VARIABLE VOLUMETRIC RATIO ENGINE
US76286906P 2006-01-30 2006-01-30
PCT/FR2007/000146 WO2007085736A1 (en) 2006-01-26 2007-01-26 Oil spray lubrication and cooling device for a variable compression ratio engine

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EP1977093A1 true EP1977093A1 (en) 2008-10-08

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EP07730864A Pending EP1977093A1 (en) 2006-01-26 2007-01-26 Oil spray lubrication and cooling device for a variable compression ratio engine

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US (1) US20100224143A1 (en)
EP (1) EP1977093A1 (en)
JP (1) JP2009524766A (en)
KR (1) KR20080090465A (en)
CN (1) CN101375033A (en)
AU (1) AU2007209221A1 (en)
CA (1) CA2640841A1 (en)
FR (1) FR2896535B1 (en)
WO (1) WO2007085736A1 (en)

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FR3051838B1 (en) * 2016-05-24 2018-09-07 MCE 5 Development DEVICE FOR GUIDING A PISTON OF A COMBUSTION PISTON FOR A VARIABLE COMPRESSION RATE MOTOR
FR3063307B1 (en) * 2017-02-28 2019-03-29 MCE 5 Development PRESS DEVICE FOR EXERCISING A HOLDING EFFORT ON A TRANSMISSION DEVICE AND MOTOR PROVIDED WITH SUCH A DEVICE.
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FR2896535A1 (en) 2007-07-27
WO2007085736A1 (en) 2007-08-02
FR2896535B1 (en) 2008-05-02
US20100224143A1 (en) 2010-09-09
AU2007209221A1 (en) 2007-08-02
CN101375033A (en) 2009-02-25
KR20080090465A (en) 2008-10-08
CA2640841A1 (en) 2007-08-02
JP2009524766A (en) 2009-07-02

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