EP2329120B1 - Cooling circuit for the thermal regulation of an engine independent from other consumers - Google Patents

Cooling circuit for the thermal regulation of an engine independent from other consumers Download PDF

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Publication number
EP2329120B1
EP2329120B1 EP09752431.8A EP09752431A EP2329120B1 EP 2329120 B1 EP2329120 B1 EP 2329120B1 EP 09752431 A EP09752431 A EP 09752431A EP 2329120 B1 EP2329120 B1 EP 2329120B1
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EP
European Patent Office
Prior art keywords
cooling
engine
loop
consumer
cooling circuit
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EP09752431.8A
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German (de)
French (fr)
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EP2329120A2 (en
Inventor
Frederic Benet
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Renault SAS
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Renault SAS
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    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • 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
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/02—Intercooler
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater

Definitions

  • the present invention relates to the field of engine thermal control systems and more particularly to the field of control systems for the distribution of the coolant of an engine.
  • the reduction of pollutant emissions of the engine consumption during the rise in temperature can be considered by regulating the temperature of the engine.
  • the transitional phase during the temperature rise of the engine, it appears an overconsumption of fuel due to the high viscosity of the engine lubricating oil and an incomplete combustion phenomenon with significant emissions of fuel. hydrocarbons and monoxides, especially carbon and nitrogen, due to the low temperature of the walls of the combustion chamber.
  • the heat engine In order to reduce the consumption and the polluting emissions during the rise in temperature, the heat engine is not cooled.
  • the metal masses and the lubricating oil have temperatures that increase more rapidly than in the case where a circulation of coolant exists within the engine. The flow of coolant within the engine is then cut during the temperature rise phase.
  • the exhaust gases are recirculated from the exhaust to the intake of the engine, causing them to undergo a step cooling, thanks to an Exhaust Gas Recirculation (EGR) device.
  • EGR Exhaust Gas Recirculation
  • the bearing of the turbocharger it is necessary to use a cooled housing in which the coolant flows to collect heat from the metal mass and the oil of the turbocharger.
  • thermal regulation involves a wax thermostat integrated in the cooling circuit of the engine. It is important that the new regulations are implemented with a limited additional cost compared to existing control systems.
  • a known cooling fluid circulation control system consists in positioning a three-way valve at the inlet of the engine, downstream of the water pump, this three-way valve supplying a conduit allowing the circulation of the coolant between the pump and the engine. water downstream of the engine and an output of the engine that powers the consumers.
  • a system has the disadvantage of not being able to meet the implementation constraints, especially as the installation of a valve between the water pump and the crankcase of the engine remains complex to achieve.
  • Another known regulation system is shown in FR 2 908 458 A1 .
  • the present invention aims to propose a solution which makes it possible to overcome at least one disadvantage of the prior art and in particular to propose a thermal regulation system which manages the circulation of the coolant of a heat engine and its consumers without it being necessary for a stitching to be implanted at the interface between the water pump and the crankcase. engine cylinder.
  • a thermal regulation device for a cooling system of at least one internal combustion engine comprising a pump positioned upstream of a cooling chamber of the crankcase block and / or of the engine cylinder head and at least one consumer requiring permanent cooling
  • the device comprising at least one main duct allowing the circulation of the cooling liquid through the engine cooling chamber and a secondary duct which bypasses the engine cooling chamber, characterized in that a two-way valve is positioned on the main duct, at the outlet of the engine cooling chamber, and in that the secondary duct comprises a tapping on the main duct, downstream of the pump and upstream of the engine; portion of the main duct that participates in the cooling of the engine, so that the flow is kept constant and permanent for food the cooling of at least one consumer.
  • the cooling device for a cooling system of at least one internal combustion engine is characterized in that, the main duct comprising, at its end in connection with the pump, a distributor bar which runs along the crankcase block. -cylinders and / or the cylinder head and which distributes the coolant in several accessory ducts which leave the distributor strip and intended for cooling the engine, the bar not participating in a heat exchange with the engine, the sewing of the secondary duct on the main duct is made on the dispenser bar.
  • the cooling device for a cooling system of at least one engine with Internal combustion is characterized in that the stitching of the secondary duct on the dispenser bar is positioned to provide a balanced distribution of coolant flow rates between the secondary duct and the various accessory ducts.
  • Another objective of the invention is to propose a system that makes it possible to integrate the device of the invention.
  • a cooling circuit for the thermal regulation of an engine and at least one consumer comprising a supply pump for the displacement of a coolant
  • the cooling circuit comprises a thermal regulation device according to the invention, the regulating device supplying on the one hand, through its main duct at the motor outlet, a first loop which comprises at least one accessory to be cooled, and on the other hand by its secondary duct a second loop which comprises at least one consumer requiring permanent cooling and / or continuous during operation of the engine, the second loop opening at its end downstream in the first loop of the cooling circuit.
  • the cooling circuit for the thermal regulation of an engine and of at least one consumer by displacement of a cooling liquid according to the invention is characterized in that at the engine outlet, the duct main feeds a third loop that cools at least one accessory, the third loop joining the first loop upstream of the pump, and the third loop comprising a two-way thermostatic valve.
  • the cooling circuit for the thermal regulation of an engine and of at least one consumer by displacement of a cooling liquid according to the invention is characterized in that the junction of the third loop with the first loop takes place via a double-acting thermostatic valve fed by a pipe which makes a stitch downstream of the two-way valve of the first loop, the double acting thermostatic valve for regulating the temperature of the coolant while maintaining a flow of coolant with a constant flow in the engine .
  • the cooling circuit for the thermal regulation of an engine and of at least one consumer by displacement of a cooling liquid according to the invention is characterized in that the consumer requiring permanent cooling and / or continuous is formed by at least one turbocharger and / or an exhaust gas recirculation device and / or in that the first loop participates in the supply of at least one heater and / or in that the third loop participates in the supply of at least one radiator.
  • Another object of the invention is to provide at least one method for enabling the operation of the cooling circuit of the invention.
  • a method of operating a cooling circuit characterized in that the method comprises at least one step of closing the two-way valve mounted on the first loop of the cooling circuit for partly to suspend the engine cooling and secondly to maintain constant cooling of at least one consumer.
  • the method of operating a cooling circuit according to the invention is characterized in that the method comprises at least one step of opening the two-way valve mounted on the first loop of the cooling circuit for on the one hand to allow the cooling of the engine and on the other hand to maintain a constant cooling of at least one consumer.
  • the method of operating a cooling circuit according to the invention is characterized in that the method comprises at least one step of opening the thermostatic two-way valve mounted on the third loop of the cooling circuit for firstly allow cooling of the engine and secondly allow the cooling of at least one accessory of the third loop, while maintaining a constant cooling of at least one consumer with the second circuit loop cooling.
  • upstream and downstream borrowed to position different elements relative to each other, are used in reference to the direction of the flow of coolant in the circuit or circuits to which they relate.
  • the thermal regulation device of the cooling system of the invention is intended to be positioned in the periphery of an engine (1) and in particular at the level of the chamber which participates in the cooling of the crankcase block and / or the cylinder head of the engine.
  • This device comprises a main duct (2) which circulates the cooling liquid in the enclosure of the crankcase block and / or the cylinder head of the engine (1).
  • a secondary duct (3) which recovers a portion of the flow of the main duct (2) to divert it out of the engine cooling chamber (1).
  • the branching of the secondary duct (3) on the main duct (2) is effected upstream of the engine inlet of the coolant and downstream of a supply pump (5) so that the two ducts (2, 3) are fed by the same pump (5) while allowing a supply of the secondary conduit (3) with coolant which has not yet achieved heat exchange with an element to be cooled.
  • the main duct (2) comprises a two-way valve (4) which reversibly suspends the flow of cooling liquid in the main duct (2). The positioning of this valve (4) avoids the positioning of a component at the interface between the pump (5) and the motor (1) to be cooled.
  • closing the valve (4) makes it possible to stop the flow of the cooling liquid in the main duct (2). ) while maintaining a continuous flow in the secondary conduit (3).
  • the main duct (2) may comprise, at its end arranged directly downstream of the pump (5), a distribution bar (2a) which runs along at least a portion of the casing. cylinders and / or cylinder head of the engine. From this bar of distribution (2a), leave several accessory ducts (2b) which participate directly in cooling the engine (1) by feeding different areas of the cooling chamber.
  • the distribution strip (2a) does not participate directly in the cooling of the motor (1), so that the cooling liquid which passes through it leaves directly from the pump (5) and has not yet carried out an exchange. caloric with the motor (1).
  • the heat exchange capacities of the coolant recovered by the secondary duct (3) are then optimal. Stitching of the secondary conduit (3) can then be carried out directly along the length of the distribution bar (2a).
  • the stitching of the secondary duct (3) on the distribution bar (2a) is performed so that the distribution is balanced between the secondary duct (3) and the various accessory ducts (2b).
  • the thermal control device of the invention aims to be integrated in a cooling circuit of a motor (1) but also of one or more consumers (6) and / or accessories (11, 12, 13). , 15, 16).
  • These consumers (6) are generally the turbocharger (6a) and the exhaust gas recirculation device (6b) which require permanent cooling by the cooling circuit, independently of the thermal regulation which is carried out at the crankcase. and the engine cylinder head (1).
  • the cooling circuit which integrates the device of the invention has a first cooling loop (7) which notably comprises the pump (5) and the main duct (2) which contributes to the cooling of the engine (1) and at least an accessory, for example a heater (11), cooled by the circuit of the first cooling loop (7).
  • the only constraint in the positioning of the heater is to be placed on the main loop (7).
  • the latter must, in fact, be fed with coolant having passed through the engine when the thermostat (4) is open.
  • the flow of coolant flow in the first cooling loop (7) is dependent on the opening and the closing of the two-way valve (4) which makes it possible to stop the cooling of the engine (1) while stagnating the cooling liquid in the chamber of the crankcase block and / or the cylinder head.
  • a second loop (8) which bypasses the first loop (7) bypassing the cooling of the engine via the secondary conduit (3) of the device of the invention.
  • This second loop (8) also comprises the pump (5) and optionally one or more accessories to be cooled, such as the heater (11).
  • this second loop (8) has at the level of the secondary duct (3) which bypasses the main duct (2), and therefore the engine cooling (1), one or more of the consumers (6) which require cooling maintained.
  • These consumers (6) can be arranged in series or in parallel depending on the desired cooling mode. Downstream of these consumers (6), the secondary duct (3) joins the circuit of the first loop (7) upstream or downstream of one or more of the accessories (11) cooled by the first loop (7).
  • this second loop (8) comprises no valve on its path to stop the flow of coolant.
  • the cooling of the consumers (6) by this second loop (8) is then permanent and independent of the opening and closing of the valve (4) of the main duct (2) and therefore the cooling of the crankcase and / or the engine cylinder head (1).
  • a third loop (9) can be added to the cooling circuit.
  • This loop (9) comprises, as for the first loop (7), the pump (5) supply and the main conduit (2) which participates in cooling the motor (1).
  • the circuit of the third loop (9) is detached to participate in the cooling of one or more accessories, such as for example a radiator (12), a gearbox (13), a jar (15) or a water-oil exchanger (16), positioned in series or in parallel on the cooling loop (9).
  • the third cooling loop (9) joins the first loop (7) upstream of the supply pump (5).
  • the flow of the coolant in this third loop (9) can be controlled by the valve (4) of the first loop (7).
  • the stitching is performed at the motor output (1) and upstream of the valve (4) of the first loop (7), while a thermostatic two-way valve (10) is positioned on the circuit of the third cooling loop (9).
  • this valve (10) is positioned on the loop (9) at the motor output downstream of the stitching of the third loop (9) on the first loop (7), so as to be positioned upstream of the accessories (12, 13, 15, 16) which it controls the power supply.
  • this valve (10) is positioned on the loop (9) downstream of the accessories (12, 13, 15, 16) of the loop (9) and upstream of the junction of the third loop (9) with the first loop, this junction being realized upstream of the pump (5) supply.
  • the thermostatic two-way valve (10) makes it possible to manage the circulation in the third loop (9) of the circuit as a function of the temperature of the circulating coolant.
  • the thermostatic valve may, for example, incorporate a wax mixture which gradually becomes liquid when the temperature of the liquid, at which the thermostatic valve is immersed, increases. By liquefying, the wax mixture gradually expands to occupy a larger volume which then causes the movement of a valve or piston of the valve.
  • the junction of the third loop (9) with the first loop (7) which is performed at the loop return, upstream of the supply pump (5) is the positioning point of the a double-acting thermostatic valve (14).
  • This double-acting valve (14) makes it possible to regulate the temperature of the coolant, in the same way as a single-acting thermostatic valve, while maintaining a flow of coolant with a constant flow, whatever the position. , open, closed or regulation, of the thermostatic valve (14).
  • the thermostatic valve (14) is fed by a duct (14a) which makes a stitching on the first loop, downstream of the two-way valve (4) of the main duct (2).
  • the loops borrowed in the circuit will be a function of the opening of the different valves (4, 10, 14).
  • the coolant has a flow rate that is kept constant in the second loop (8) of the circuit, that is to say in particular in the secondary conduit (3), to allow the cooling of certain consumers (6), such as, for example, the turbocharger (6a) and / or the exhaust gas recirculation device (6b), while preventing engine cooling (1) with zero flow in the main duct (2) of the device.
  • the circulation of the cooling liquid is kept constant thanks to the supply pump (5) and the short-circuiting of the cooling of the motor (1) by the secondary conduit (3).

Description

La présente invention se rapporte au domaine des systèmes de régulation thermique des moteurs et plus particulièrement au domaine des systèmes de régulation de la distribution du liquide de refroidissement d'un moteur.The present invention relates to the field of engine thermal control systems and more particularly to the field of control systems for the distribution of the coolant of an engine.

La diminution des émissions polluantes de la consommation du moteur lors de la montée en température peut être envisagée grâce à la régulation de la température du moteur thermique. Au cours de la phase transitoire, lors de la montée en température du moteur thermique, il apparaît une surconsommation de carburant du fait de la grande viscosité de l'huile de lubrification du moteur et d'un phénomène de combustion incomplet avec des émissions importantes d'hydrocarbures et de monoxydes, notamment de carbone et d'azote, en raison de la faible température des parois de la chambre de combustion.The reduction of pollutant emissions of the engine consumption during the rise in temperature can be considered by regulating the temperature of the engine. During the transitional phase, during the temperature rise of the engine, it appears an overconsumption of fuel due to the high viscosity of the engine lubricating oil and an incomplete combustion phenomenon with significant emissions of fuel. hydrocarbons and monoxides, especially carbon and nitrogen, due to the low temperature of the walls of the combustion chamber.

Afin de diminuer la consommation et les émissions polluantes lors de la montée en température, le moteur thermique n'est pas refroidi. Les masses métalliques et l'huile de lubrification ont des températures qui augmentent plus rapidement que dans le cas où une circulation du liquide de refroidissement existe au sein du moteur. Le débit de liquide de refroidissement au sein du moteur est alors coupé lors de la phase de montée en température.In order to reduce the consumption and the polluting emissions during the rise in temperature, the heat engine is not cooled. The metal masses and the lubricating oil have temperatures that increase more rapidly than in the case where a circulation of coolant exists within the engine. The flow of coolant within the engine is then cut during the temperature rise phase.

Dans le même temps, pour restreindre la quantité d'émission de monoxydes, par exemple d'azote, les gaz d'échappement sont remis en circulation depuis l'échappement jusqu'à l'admission du moteur thermique, en leur faisant subir une étape de refroidissement, grâce à un dispositif E.G.R. (Exhaust Gaz Recirculation). De même, afin de refroidir le palier du turbocompresseur, il convient d'utiliser un carter refroidi dans lequel le liquide de refroidissement circule afin de prélever de la chaleur de la masse métallique et de l'huile du turbocompresseur.At the same time, to restrict the amount of emission of monoxides, for example nitrogen, the exhaust gases are recirculated from the exhaust to the intake of the engine, causing them to undergo a step cooling, thanks to an Exhaust Gas Recirculation (EGR) device. Similarly, to cool the bearing of the turbocharger, it is necessary to use a cooled housing in which the coolant flows to collect heat from the metal mass and the oil of the turbocharger.

Ces différentes régulations thermiques du moteur d'une part et des consommateurs que sont le turbocompresseur et le dispositif E.G.R. de recirculation des gaz d'autre part, doivent être réalisées simultanément. En effet, au cours de la phase de montée en température, il est important que le turbocompresseur et le dispositif de recyclage des gaz d'échappement soient toujours refroidis.These different thermal regulations of the engine on the one hand and consumers that are the turbocharger and E.G.R. recirculation of gases on the other hand, must be performed simultaneously. Indeed, during the temperature rise phase, it is important that the turbocharger and the exhaust gas recycling device are always cooled.

Actuellement, la régulation thermique fait intervenir un thermostat à cire intégré au sein du circuit de refroidissement du moteur thermique. Il est important que les nouvelles régulations soient réalisées avec un surcoût limité par rapport aux systèmes de régulation déjà existants.Currently, thermal regulation involves a wax thermostat integrated in the cooling circuit of the engine. It is important that the new regulations are implemented with a limited additional cost compared to existing control systems.

Pour répondre aux problèmes des différentes régulations thermiques avec la circulation du liquide de refroidissement lors de la régulation thermique d'un moteur, différents dispositifs ont été proposés.To answer the problems of the different thermal regulations with the circulation of the coolant during the thermal regulation of an engine, various devices have been proposed.

Un système de régulation de la circulation du liquide de refroidissement connu consiste à positionner une vanne trois voies en entrée du moteur, en aval de la pompe à eau, cette vanne trois voies alimentant un conduit permettant la circulation du liquide de refroidissement entre la pompe à eau en aval du moteur et une sortie du moteur qui alimente les consommateurs. Cependant un tel système présente l'inconvénient de ne pas pouvoir répondre aux contraintes d'implantation d'autant que l'implantation d'une vanne entre la pompe à eau et le carter-cylindre du moteur demeure complexe à réaliser. Un autre système de régulation connu est montré dans FR 2 908 458 A1 .A known cooling fluid circulation control system consists in positioning a three-way valve at the inlet of the engine, downstream of the water pump, this three-way valve supplying a conduit allowing the circulation of the coolant between the pump and the engine. water downstream of the engine and an output of the engine that powers the consumers. However, such a system has the disadvantage of not being able to meet the implementation constraints, especially as the installation of a valve between the water pump and the crankcase of the engine remains complex to achieve. Another known regulation system is shown in FR 2 908 458 A1 .

Une variante de ce système de régulation de la circulation du liquide de refroidissement consiste à positionner la vanne trois voies en sortie du moteur, cette vanne alimentant le conduit qui court-circuite la circulation du liquide de refroidissement dans le moteur. Toutefois, cette solution ne permet pas de résoudre la difficulté d'implantation d'un piquage entre la pompe à eau et le carter-cylindre du moteur.An alternative to this coolant flow control system is to position the three-way valve at the output of the engine, this valve supplying the conduit which bypasses the flow of coolant in the engine. However, this solution does not solve the difficulty of implementing a tapping between the water pump and the crankcase of the engine.

La présente invention a pour objectif de proposer une solution qui permet de s'affranchir d'au moins un inconvénient de l'art antérieur et notamment de proposer un système de régulation thermique qui gère la circulation du liquide de refroidissement d'un moteur thermique et de ses consommateurs sans qu'il soit nécessaire qu'un piquage soit implanté à l'interface entre la pompe à eau et le carter-cylindre du moteur.The present invention aims to propose a solution which makes it possible to overcome at least one disadvantage of the prior art and in particular to propose a thermal regulation system which manages the circulation of the coolant of a heat engine and its consumers without it being necessary for a stitching to be implanted at the interface between the water pump and the crankcase. engine cylinder.

Cet objectif est atteint grâce à un dispositif de régulation thermique pour un système de refroidissement d'au moins un moteur à combustion interne comprenant une pompe positionnée en amont d'une enceinte de refroidissement du bloc carter-cylindres et/ou de la culasse du moteur et au moins un consommateur nécessitant un refroidissement permanent, le dispositif comprenant au moins un conduit principal permettant la circulation du liquide de refroidissement à travers l'enceinte de refroidissement du moteur et un conduit secondaire qui contourne l'enceinte de refroidissement du moteur, caractérisé en ce qu'une vanne deux voies est positionnée sur le conduit principal, en sortie de l'enceinte de refroidissement du moteur, et en ce que le conduit secondaire comprend un piquage sur le conduit principal, en aval de la pompe et en amont de la portion du conduit principal qui participe au refroidissement du moteur, de sorte que le débit est maintenu constant et permanent pour alimenter le refroidissement d'au moins un consommateur.This objective is achieved by means of a thermal regulation device for a cooling system of at least one internal combustion engine comprising a pump positioned upstream of a cooling chamber of the crankcase block and / or of the engine cylinder head and at least one consumer requiring permanent cooling, the device comprising at least one main duct allowing the circulation of the cooling liquid through the engine cooling chamber and a secondary duct which bypasses the engine cooling chamber, characterized in that a two-way valve is positioned on the main duct, at the outlet of the engine cooling chamber, and in that the secondary duct comprises a tapping on the main duct, downstream of the pump and upstream of the engine; portion of the main duct that participates in the cooling of the engine, so that the flow is kept constant and permanent for food the cooling of at least one consumer.

Le dispositif de refroidissement pour un système de refroidissement d'au moins un moteur à combustion interne selon l'invention est caractérisé en ce que, le conduit principal comprenant, à son extrémité en relation avec la pompe, une barrette distributrice qui longe le bloc carter-cylindres et/ou la culasse et qui répartit le liquide de refroidissement dans plusieurs conduits accessoires qui partent de la barrette distributrice et destinés au refroidissement du moteur, la barrette ne participant pas à un échange calorique avec le moteur, le piquage du conduit secondaire sur le conduit principal s'effectue sur la barrette distributrice.The cooling device for a cooling system of at least one internal combustion engine according to the invention is characterized in that, the main duct comprising, at its end in connection with the pump, a distributor bar which runs along the crankcase block. -cylinders and / or the cylinder head and which distributes the coolant in several accessory ducts which leave the distributor strip and intended for cooling the engine, the bar not participating in a heat exchange with the engine, the sewing of the secondary duct on the main duct is made on the dispenser bar.

Selon une autre variante de réalisation, le dispositif de refroidissement pour un système de refroidissement d'au moins un moteur à combustion interne selon l'invention est caractérisé en ce que le piquage du conduit secondaire sur la barrette distributrice est positionné de façon à fournir une distribution équilibrée des débits de liquide de refroidissement entre le conduit secondaire et les différents conduits accessoires.According to another variant embodiment, the cooling device for a cooling system of at least one engine with Internal combustion according to the invention is characterized in that the stitching of the secondary duct on the dispenser bar is positioned to provide a balanced distribution of coolant flow rates between the secondary duct and the various accessory ducts.

Un autre objectif de l'invention est de proposer un système qui permette d'intégrer le dispositif de l'invention.Another objective of the invention is to propose a system that makes it possible to integrate the device of the invention.

Cet objectif est atteint grâce à un circuit de refroidissement pour la régulation thermique d'un moteur et d'au moins un consommateur comprenant un pompe d'alimentation pour le déplacement d'un liquide de refroidissement, caractérisé en ce que le circuit de refroidissement comprend un dispositif de régulation thermique selon l'invention, le dispositif de régulation alimentant d'une part par son conduit principal en sortie de moteur une première boucle qui comprend au moins un accessoire à refroidir, et d'autre part par son conduit secondaire une seconde boucle qui comprend au moins un consommateur nécessitant un refroidissement permanent et/ou continu au cours du fonctionnement du moteur, la seconde boucle débouchant à son extrémité située en aval, dans la première boucle du circuit de refroidissement.This objective is achieved by means of a cooling circuit for the thermal regulation of an engine and at least one consumer comprising a supply pump for the displacement of a coolant, characterized in that the cooling circuit comprises a thermal regulation device according to the invention, the regulating device supplying on the one hand, through its main duct at the motor outlet, a first loop which comprises at least one accessory to be cooled, and on the other hand by its secondary duct a second loop which comprises at least one consumer requiring permanent cooling and / or continuous during operation of the engine, the second loop opening at its end downstream in the first loop of the cooling circuit.

Selon une variante de réalisation, le circuit de refroidissement pour la régulation thermique d'un moteur et d'au moins un consommateur par déplacement d'un liquide de refroidissement selon l'invention est caractérisé en ce qu'en sortie de moteur, le conduit principal alimente une troisième boucle qui refroidit au moins un accessoire, cette troisième boucle rejoignant la première boucle en amont de la pompe, et cette troisième boucle comprenant une vanne thermostatique deux voies.According to an alternative embodiment, the cooling circuit for the thermal regulation of an engine and of at least one consumer by displacement of a cooling liquid according to the invention is characterized in that at the engine outlet, the duct main feeds a third loop that cools at least one accessory, the third loop joining the first loop upstream of the pump, and the third loop comprising a two-way thermostatic valve.

Selon une autre variante de réalisation, le circuit de refroidissement pour la régulation thermique d'un moteur et d'au moins un consommateur par déplacement d'un liquide de refroidissement selon l'invention est caractérisé en ce que la jonction de la troisième boucle avec la première boucle s'effectue par l'intermédiaire d'une vanne thermostatique double effet alimentée par un conduit qui réalise un piquage en aval de la vanne deux voies de la première boucle, la vanne thermostatique double effet permettant de réguler la température du liquide de refroidissement tout en maintenant un flux de liquide de refroidissement avec un débit constant dans le moteur.According to another variant embodiment, the cooling circuit for the thermal regulation of an engine and of at least one consumer by displacement of a cooling liquid according to the invention is characterized in that the junction of the third loop with the first loop takes place via a double-acting thermostatic valve fed by a pipe which makes a stitch downstream of the two-way valve of the first loop, the double acting thermostatic valve for regulating the temperature of the coolant while maintaining a flow of coolant with a constant flow in the engine .

Selon une autre variante de réalisation, le circuit de refroidissement pour la régulation thermique d'un moteur et d'au moins un consommateur par déplacement d'un liquide de refroidissement selon l'invention est caractérisé en ce que le consommateur nécessitant un refroidissement permanent et/ou continu est formé par au moins un turbocompresseur et/ou un dispositif de recirculation des gaz d'échappement et/ou en ce que la première boucle participe à l'alimentation d'au moins un aérotherme et/ou en ce que la troisième boucle participe à l'alimentation d'au moins un radiateur.According to another variant embodiment, the cooling circuit for the thermal regulation of an engine and of at least one consumer by displacement of a cooling liquid according to the invention is characterized in that the consumer requiring permanent cooling and / or continuous is formed by at least one turbocharger and / or an exhaust gas recirculation device and / or in that the first loop participates in the supply of at least one heater and / or in that the third loop participates in the supply of at least one radiator.

Un autre objectif de l'invention est de proposer au moins un procédé pour permettre le fonctionnement du circuit de refroidissement de l'invention.Another object of the invention is to provide at least one method for enabling the operation of the cooling circuit of the invention.

Cet objectif est atteint grâce à un procédé de fonctionnement d'un circuit de refroidissement selon l'invention caractérisé en ce que le procédé comprend au moins une étape de fermeture de la vanne deux voies montée sur la première boucle du circuit de refroidissement pour d'une part suspendre le refroidissement du moteur et d'autre part maintenir un refroidissement constant d'au moins un consommateur.This objective is achieved by a method of operating a cooling circuit according to the invention characterized in that the method comprises at least one step of closing the two-way valve mounted on the first loop of the cooling circuit for partly to suspend the engine cooling and secondly to maintain constant cooling of at least one consumer.

Selon une variante de réalisation, le procédé de fonctionnement d'un circuit de refroidissement selon l'invention est caractérisé en ce que le procédé comprend au moins une étape d'ouverture de la vanne deux voies montée sur la première boucle du circuit de refroidissement pour d'une part permettre le refroidissement du moteur et d'autre part maintenir un refroidissement constant d'au moins un consommateur.According to an alternative embodiment, the method of operating a cooling circuit according to the invention is characterized in that the method comprises at least one step of opening the two-way valve mounted on the first loop of the cooling circuit for on the one hand to allow the cooling of the engine and on the other hand to maintain a constant cooling of at least one consumer.

Selon une autre variante de réalisation, le procédé de fonctionnement d'un circuit de refroidissement selon l'invention est caractérisé en ce que le procédé comprend au moins une étape d'ouverture de la vanne deux voies thermostatique montée sur la troisième boucle du circuit de refroidissement pour d'une part permettre le refroidissement du moteur et d'autre part permettre le refroidissement d'au moins un accessoire de la troisième boucle, tout en maintenant un refroidissement constant d'au moins un consommateur avec la seconde boucle du circuit de refroidissement.According to another variant embodiment, the method of operating a cooling circuit according to the invention is characterized in that the method comprises at least one step of opening the thermostatic two-way valve mounted on the third loop of the cooling circuit for firstly allow cooling of the engine and secondly allow the cooling of at least one accessory of the third loop, while maintaining a constant cooling of at least one consumer with the second circuit loop cooling.

L'invention, avec ses caractéristiques et avantages, ressortira plus clairement à la lecture de la description faite en référence aux dessins annexés dans lesquels :

  • la figure 1 représente un schéma de réalisation d'un dispositif de régulation thermique au niveau d'un moteur selon l'art antérieur,
  • la figure 2 représente un schéma de réalisation d'un dispositif de régulation thermique au niveau d'un moteur selon l'invention,
  • la figure 3 représente un exemple de réalisation d'un dispositif de régulation thermique au niveau d'un moteur susceptible d'être adapté pour correspondre au dispositif de l'invention,
  • la figure 4 représente un exemple de réalisation d'un dispositif de régulation thermique au niveau d'un moteur selon l'invention
  • la figure 5 représente schématiquement un exemple de circuit de refroidissement intégrant le dispositif de l'invention et fonctionnant avec toutes les vannes fermées,
  • la figure 6 représente schématiquement un exemple de circuit de refroidissement intégrant le dispositif de l'invention et fonctionnant avec uniquement la vanne du conduit principal qui est ouverte,
  • la figure 7 représente schématiquement un exemple de circuit de refroidissement intégrant le dispositif de l'invention et fonctionnant avec toutes les vannes du circuit ouvertes,
  • la figure 8 représente schématiquement une variante de réalisation du schéma de la figure 7,
  • la figure 9 représente schématiquement une variante de réalisation du schéma de la figure 7 incluant une vanne thermostatique double effet.
The invention, with its features and advantages, will emerge more clearly on reading the description given with reference to the appended drawings in which:
  • the figure 1 represents an embodiment diagram of a thermal control device at the level of an engine according to the prior art,
  • the figure 2 represents a diagram of embodiment of a thermal regulation device at the level of an engine according to the invention,
  • the figure 3 represents an exemplary embodiment of a thermal control device at a motor that can be adapted to correspond to the device of the invention,
  • the figure 4 represents an exemplary embodiment of a thermal control device at an engine according to the invention
  • the figure 5 schematically represents an example of a cooling circuit integrating the device of the invention and operating with all the closed valves,
  • the figure 6 schematically represents an example of a cooling circuit incorporating the device of the invention and operating with only the valve of the main duct which is open,
  • the figure 7 schematically represents an example of a cooling circuit integrating the device of the invention and operating with all the valves of the open circuit,
  • the figure 8 schematically represents a variant embodiment of the diagram of the figure 7 ,
  • the figure 9 schematically represents a variant embodiment of the diagram of the figure 7 including a double-acting thermostatic valve.

Il convient de remarquer que dans le présent document, les termes « amont » et « aval » empruntés pour positionner différents éléments les uns par rapport aux autres, sont utilisés en référence au sens du flux de liquide de refroidissement dans le ou les circuits auxquels ils se rapportent.It should be noted that in this document, the terms "upstream" and "downstream" borrowed to position different elements relative to each other, are used in reference to the direction of the flow of coolant in the circuit or circuits to which they relate.

Le dispositif de régulation thermique du système de refroidissement de l'invention est destiné à être positionné dans la périphérie d'un moteur (1) et notamment au niveau de l'enceinte qui participe au refroidissement du bloc carter-cylindres et/ou de la culasse du moteur. Ce dispositif comprend un conduit principal (2) qui assure la circulation du liquide de refroidissement dans l'enceinte du bloc carter-cylindres et/ou de la culasse du moteur (1). A ce conduit principal (2) est associé un conduit secondaire (3) qui récupère une partie du débit du conduit principal (2) pour le détourner hors de l'enceinte de refroidissement du moteur (1). Le piquage du conduit secondaire (3) sur le conduit principal (2) est effectué en amont de l'entrée moteur du liquide de refroidissement et en aval d'une pompe (5) d'alimentation de sorte que les deux conduits (2, 3) sont alimentés par la même pompe (5) tout en permettant une alimentation du conduit secondaire (3) avec du liquide de refroidissement qui n'a pas encore réalisé d'échange calorique avec un élément à refroidir. En sortie moteur, le conduit principal (2) comprend une vanne (4) deux voies qui permet de suspendre de façon réversible le débit de liquide de refroidissement dans le conduit principal (2). Le positionnement de cette vanne (4) permet d'éviter le positionnement d'un composant à l'interface entre la pompe (5) et le moteur (1) à refroidir. De plus, grâce au piquage du conduit secondaire (3) sur le conduit principal (2) en amont de l'entrée moteur, la fermeture de la vanne (4) permet de stopper le débit du liquide de refroidissement dans le conduit principal (2) tout en maintenant un flux continu dans le conduit secondaire (3).The thermal regulation device of the cooling system of the invention is intended to be positioned in the periphery of an engine (1) and in particular at the level of the chamber which participates in the cooling of the crankcase block and / or the cylinder head of the engine. This device comprises a main duct (2) which circulates the cooling liquid in the enclosure of the crankcase block and / or the cylinder head of the engine (1). To this main duct (2) is associated a secondary duct (3) which recovers a portion of the flow of the main duct (2) to divert it out of the engine cooling chamber (1). The branching of the secondary duct (3) on the main duct (2) is effected upstream of the engine inlet of the coolant and downstream of a supply pump (5) so that the two ducts (2, 3) are fed by the same pump (5) while allowing a supply of the secondary conduit (3) with coolant which has not yet achieved heat exchange with an element to be cooled. At the motor output, the main duct (2) comprises a two-way valve (4) which reversibly suspends the flow of cooling liquid in the main duct (2). The positioning of this valve (4) avoids the positioning of a component at the interface between the pump (5) and the motor (1) to be cooled. In addition, by tapping the secondary duct (3) on the main duct (2) upstream of the motor inlet, closing the valve (4) makes it possible to stop the flow of the cooling liquid in the main duct (2). ) while maintaining a continuous flow in the secondary conduit (3).

Au niveau de l'enceinte de refroidissement, le conduit principal (2) peut comprendre, au niveau de son extrémité disposée directement en aval de la pompe (5), une barrette de distribution (2a) qui longe au moins une partie du carter-cylindres et/ou de la culasse du moteur. De cette barrette de distribution (2a), partent plusieurs conduits accessoires (2b) qui participent directement au refroidissement du moteur (1) en alimentant différentes zones de l'enceinte de refroidissement. La barrette de distribution (2a), elle, ne participe pas directement au refroidissement du moteur (1), de sorte que le liquide de refroidissement qui la traverse sort directement de la pompe (5) et n'a pas encore effectué d'échange calorique avec le moteur (1). Les capacités d'échanges caloriques du liquide de refroidissement récupéré par le conduit secondaire (3) sont alors optimales. Le piquage du conduit secondaire (3) peut alors se réaliser directement sur la longueur de la barrette de distribution (2a). Selon un mode de réalisation préféré, le piquage du conduit secondaire (3) sur la barrette de distribution (2a) est effectué de sorte que la distribution est équilibrée entre le conduit secondaire (3) et les différents conduits accessoires (2b).At the level of the cooling chamber, the main duct (2) may comprise, at its end arranged directly downstream of the pump (5), a distribution bar (2a) which runs along at least a portion of the casing. cylinders and / or cylinder head of the engine. From this bar of distribution (2a), leave several accessory ducts (2b) which participate directly in cooling the engine (1) by feeding different areas of the cooling chamber. The distribution strip (2a) does not participate directly in the cooling of the motor (1), so that the cooling liquid which passes through it leaves directly from the pump (5) and has not yet carried out an exchange. caloric with the motor (1). The heat exchange capacities of the coolant recovered by the secondary duct (3) are then optimal. Stitching of the secondary conduit (3) can then be carried out directly along the length of the distribution bar (2a). According to a preferred embodiment, the stitching of the secondary duct (3) on the distribution bar (2a) is performed so that the distribution is balanced between the secondary duct (3) and the various accessory ducts (2b).

Le dispositif de régulation thermique de l'invention a pour objectif d'être intégré dans un circuit de refroidissement d'un moteur (1) mais également d'un ou de plusieurs consommateurs (6) et/ou accessoires (11, 12, 13, 15, 16). Ces consommateurs (6) sont généralement le turbocompresseur (6a) et le dispositif de recirculation des gaz d'échappement (6b) qui nécessitent un refroidissement permanent par le circuit de refroidissement, indépendamment de la régulation thermique qui est réalisé au niveau du carter-cylindres et de la culasse du moteur (1).The thermal control device of the invention aims to be integrated in a cooling circuit of a motor (1) but also of one or more consumers (6) and / or accessories (11, 12, 13). , 15, 16). These consumers (6) are generally the turbocharger (6a) and the exhaust gas recirculation device (6b) which require permanent cooling by the cooling circuit, independently of the thermal regulation which is carried out at the crankcase. and the engine cylinder head (1).

Le circuit de refroidissement qui intègre le dispositif de l'invention présente une première boucle (7) de refroidissement qui comprend notamment la pompe (5) et le conduit principal (2) qui participe au refroidissement du moteur (1) ainsi qu'au moins un accessoire, par exemple un aérotherme (11), refroidit par le circuit de la première boucle (7) de refroidissement. La seule contrainte dans le positionnement de l'aérotherme est d'être placé sur la boucle principale (7). Ce dernier doit, en effet, être alimenté par du liquide de refroidissement ayant traversé le moteur lorsque le thermostat (4) est ouvert. La circulation du flux de liquide de refroidissement dans la première boucle (7) de refroidissement est tributaire de l'ouverture et de la fermeture de la vanne (4) deux voies qui permet de stopper le refroidissement du moteur (1) en laissant stagner le liquide de refroidissement dans l'enceinte du bloc carter-cylindres et/ou de la culasse.The cooling circuit which integrates the device of the invention has a first cooling loop (7) which notably comprises the pump (5) and the main duct (2) which contributes to the cooling of the engine (1) and at least an accessory, for example a heater (11), cooled by the circuit of the first cooling loop (7). The only constraint in the positioning of the heater is to be placed on the main loop (7). The latter must, in fact, be fed with coolant having passed through the engine when the thermostat (4) is open. The flow of coolant flow in the first cooling loop (7) is dependent on the opening and the closing of the two-way valve (4) which makes it possible to stop the cooling of the engine (1) while stagnating the cooling liquid in the chamber of the crankcase block and / or the cylinder head.

A la première boucle (7) de refroidissement du circuit se rajoute une seconde boucle (8) qui court-circuite la première boucle (7) en contournant le refroidissement du moteur par l'intermédiaire du conduit secondaire (3) du dispositif de l'invention. Cette seconde boucle (8) comprend également la pompe (5) et éventuellement un ou plusieurs accessoires à refroidir, comme par exemple l'aérotherme (11). En revanche, cette seconde boucle (8) présente au niveau du conduit secondaire (3) qui court-circuite le conduit principal (2), et donc le refroidissement moteur (1), un ou plusieurs des consommateurs (6) qui nécessitent un refroidissement maintenu. Ces consommateurs (6) peuvent être disposés en série ou en parallèle selon le mode de refroidissement souhaité. En aval de ces consommateurs (6), le conduit secondaire (3) rejoint le circuit de la première boucle (7) en amont ou en aval d'un ou de plusieurs des accessoires (11) refroidis par la première boucle (7). Toutefois, la jonction du conduit secondaire (3) avec le circuit de la première boucle (7) se réalise en aval de la vanne (4) deux voies qui régule le débit de liquide de refroidissement dans l'enceinte du moteur (1). Ainsi, contrairement à la première boucle (7) du circuit de refroidissement, cette seconde boucle (8) ne comprend aucune vanne sur son parcours pour stopper le flux du liquide de refroidissement. Le refroidissement des consommateurs (6) par cette seconde boucle (8) est alors permanent et indépendant de l'ouverture et de la fermeture de la vanne (4) du conduit principal (2) et donc du refroidissement du carter-cylindres et/ou de la culasse du moteur (1).At the first cooling loop (7) of the circuit is added a second loop (8) which bypasses the first loop (7) bypassing the cooling of the engine via the secondary conduit (3) of the device of the invention. This second loop (8) also comprises the pump (5) and optionally one or more accessories to be cooled, such as the heater (11). On the other hand, this second loop (8) has at the level of the secondary duct (3) which bypasses the main duct (2), and therefore the engine cooling (1), one or more of the consumers (6) which require cooling maintained. These consumers (6) can be arranged in series or in parallel depending on the desired cooling mode. Downstream of these consumers (6), the secondary duct (3) joins the circuit of the first loop (7) upstream or downstream of one or more of the accessories (11) cooled by the first loop (7). However, the junction of the secondary duct (3) with the circuit of the first loop (7) is performed downstream of the two-way valve (4) which regulates the flow of coolant in the enclosure of the engine (1). Thus, unlike the first loop (7) of the cooling circuit, this second loop (8) comprises no valve on its path to stop the flow of coolant. The cooling of the consumers (6) by this second loop (8) is then permanent and independent of the opening and closing of the valve (4) of the main duct (2) and therefore the cooling of the crankcase and / or the engine cylinder head (1).

A ces deux premières boucles (7, 8), une troisième boucle (9) peut se rajouter au circuit de refroidissement. Cette boucle (9) comprend, comme pour la première boucle (7), la pompe (5) d'alimentation et le conduit principal (2) qui participe au refroidissement du moteur (1). En revanche, en aval ou en amont de la vanne (4) deux voies de la première boucle (7), selon le mode de réalisation, le circuit de la troisième boucle (9) se détache pour participer au refroidissement d'un ou de plusieurs accessoires, comme par exemple un radiateur (12), une boîte de vitesses (13), un bocal (15) ou un échangeur eau-huile (16), positionnés en série ou en parallèle sur la boucle (9) de refroidissement. La troisième boucle (9) de refroidissement rejoint la première boucle (7) en amont de la pompe (5) d'alimentation. Selon que le piquage de la troisième boucle (9) est réalisé en amont ou en aval de la vanne (4) de la première boucle (7), le flux du liquide de refroidissement dans cette troisième boucle (9) peut être contrôlé par la vanne (4) de la première boucle (7). Toutefois, selon un mode de réalisation préféré, le piquage est réalisé en sortie moteur (1) et en amont de la vanne (4) de la première boucle (7), tandis qu'une vanne deux voies thermostatique (10) est positionnée sur le circuit de la troisième boucle (9) de refroidissement. Selon le mode de réalisation, cette vanne (10) est positionnée sur la boucle (9) en sortie moteur en aval du piquage de la troisième boucle (9) sur la première boucle (7), de façon à être positionné en amont des accessoires (12, 13, 15, 16) dont elle contrôle l'alimentation. Selon une variante de réalisation du circuit de refroidissement, cette vanne (10) est positionnée sur la boucle (9) en aval des accessoires (12, 13, 15, 16) de la boucle (9) et en amont de la jonction de la troisième boucle (9) avec la première boucle, cette jonction se réalisant en amont de la pompe (5) d'alimentation.At these first two loops (7, 8), a third loop (9) can be added to the cooling circuit. This loop (9) comprises, as for the first loop (7), the pump (5) supply and the main conduit (2) which participates in cooling the motor (1). On the other hand, downstream or upstream of the valve (4) two channels of the first loop (7), according to the embodiment, the circuit of the third loop (9) is detached to participate in the cooling of one or more accessories, such as for example a radiator (12), a gearbox (13), a jar (15) or a water-oil exchanger (16), positioned in series or in parallel on the cooling loop (9). The third cooling loop (9) joins the first loop (7) upstream of the supply pump (5). Depending on whether the stitching of the third loop (9) is performed upstream or downstream of the valve (4) of the first loop (7), the flow of the coolant in this third loop (9) can be controlled by the valve (4) of the first loop (7). However, according to a preferred embodiment, the stitching is performed at the motor output (1) and upstream of the valve (4) of the first loop (7), while a thermostatic two-way valve (10) is positioned on the circuit of the third cooling loop (9). According to the embodiment, this valve (10) is positioned on the loop (9) at the motor output downstream of the stitching of the third loop (9) on the first loop (7), so as to be positioned upstream of the accessories (12, 13, 15, 16) which it controls the power supply. According to an alternative embodiment of the cooling circuit, this valve (10) is positioned on the loop (9) downstream of the accessories (12, 13, 15, 16) of the loop (9) and upstream of the junction of the third loop (9) with the first loop, this junction being realized upstream of the pump (5) supply.

La vanne deux voies thermostatique (10) permet de gérer la circulation dans la troisième boucle (9) du circuit en fonction de la température du liquide de refroidissement en circulation. Selon un mode de réalisation particulier, la vanne thermostatique peut, par exemple, intégrer un mélange de cire qui devient progressivement liquide lorsque la température du liquide, au niveau duquel la vanne thermostatique est plongée, augmente. En se liquéfiant, le mélange de cire se dilate progressivement pour occuper un volume plus important qui entraine alors le déplacement d'un clapet ou d'un piston de la vanne.The thermostatic two-way valve (10) makes it possible to manage the circulation in the third loop (9) of the circuit as a function of the temperature of the circulating coolant. According to a particular embodiment, the thermostatic valve may, for example, incorporate a wax mixture which gradually becomes liquid when the temperature of the liquid, at which the thermostatic valve is immersed, increases. By liquefying, the wax mixture gradually expands to occupy a larger volume which then causes the movement of a valve or piston of the valve.

Selon une variante de réalisation, la jonction de la troisième boucle (9) avec la première boucle (7) qui est effectuée au niveau du retour des boucles, en amont de la pompe (5) d'alimentation, est le point de positionnement d'une vanne thermostatique double effet (14). Cette vanne double effet (14) permet d'assurer la régulation de la température du liquide de refroidissement, au même titre qu'une vanne thermostatique simple effet, tout en maintenant un flux de liquide de refroidissement avec un débit constant, quelque soit la position, ouverte, fermée ou régulation, de la vanne (14) thermostatique. Pour permettre le maintien d'un débit constant, la vanne thermostatique (14) est alimentée par un conduit (14a) qui réalise un piquage sur la première boucle, en aval de la vanne deux voies (4) du conduit principal (2).According to an alternative embodiment, the junction of the third loop (9) with the first loop (7) which is performed at the loop return, upstream of the supply pump (5), is the positioning point of the a double-acting thermostatic valve (14). This double-acting valve (14) makes it possible to regulate the temperature of the coolant, in the same way as a single-acting thermostatic valve, while maintaining a flow of coolant with a constant flow, whatever the position. , open, closed or regulation, of the thermostatic valve (14). In order to maintain a constant flow, the thermostatic valve (14) is fed by a duct (14a) which makes a stitching on the first loop, downstream of the two-way valve (4) of the main duct (2).

Lors de l'utilisation du dispositif de régulation de l'invention dans un circuit de refroidissement, les boucles empruntées dans le circuit sera fonction de l'ouverture des différentes vannes (4, 10, 14). Lorsque toutes les vannes sont fermées, le liquide de refroidissement présente un débit qui est maintenu constant dans la seconde boucle (8) du circuit, c'est-à-dire notamment dans le conduit secondaire (3), pour permettre le refroidissement de certains consommateurs (6), comme par exemple le turbocompresseur (6a) et/ou le dispositif de recirculation des gaz d'échappement (6b), tout en empêchant le refroidissement du moteur (1) avec un débit nul dans le conduit principal (2) du dispositif. La circulation du liquide de refroidissement est maintenue constante grâce à la pompe (5) d'alimentation et le court-circuitage du refroidissement du moteur (1) par le conduit secondaire (3).When using the regulating device of the invention in a cooling circuit, the loops borrowed in the circuit will be a function of the opening of the different valves (4, 10, 14). When all the valves are closed, the coolant has a flow rate that is kept constant in the second loop (8) of the circuit, that is to say in particular in the secondary conduit (3), to allow the cooling of certain consumers (6), such as, for example, the turbocharger (6a) and / or the exhaust gas recirculation device (6b), while preventing engine cooling (1) with zero flow in the main duct (2) of the device. The circulation of the cooling liquid is kept constant thanks to the supply pump (5) and the short-circuiting of the cooling of the motor (1) by the secondary conduit (3).

Lorsque la vanne (4) deux voies est ouverte, la circulation du liquide de refroidissement s'effectue dans la première boucle (7) et la seconde boucle (8). Le conduit principal (2) du dispositif se trouve alors alimenté et le moteur (1) est refroidi par le liquide de refroidissement en déplacement.When the two-way valve (4) is open, the circulation of the coolant takes place in the first loop (7) and the second loop (8). The main pipe (2) of the device is then fed and the motor (1) is cooled by the cooling liquid in displacement.

Lorsque la vanne deux voies thermique (10) de la troisième boucle (9) du circuit est ouverte, la circulation du liquide de refroidissement est alors également autorisée dans le conduit principal (2) pour permettre le refroidissement du moteur (1), concomitamment au déplacement dans l'ensemble de la troisième boucle (9) pour permettre le refroidissement d'un ou de plusieurs accessoires (12, 13, 15, 16).When the thermal two-way valve (10) of the third loop (9) of the circuit is opened, the circulation of the coolant is then also allowed in the main conduit (2) to allow the cooling the motor (1), concomitantly with the movement throughout the third loop (9) to allow cooling of one or more accessories (12, 13, 15, 16).

Il doit être évident pour les personnes versées dans l'art que la présente invention permet des modes de réalisation sous de nombreuses autres formes spécifiques sans l'éloigner du domaine d'application de l'invention comme revendiqué. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration mais peuvent être modifiés dans le domaine défini par la portée des revendications jointes.It should be obvious to those skilled in the art that the present invention allows embodiments in many other specific forms without departing from the scope of the invention as claimed. Therefore, the present embodiments should be considered by way of illustration but may be modified in the field defined by the scope of the appended claims.

Claims (9)

  1. Thermal regulation device for a cooling system for cooling at least one internal combustion engine (1), comprising a pump (5) positioned upstream of a cooling chamber of the crankcase/cylinder block and/or the cylinder head of the engine (1) and at least one consumer (6) requiring permanent cooling, the device comprising at least one main pipe (2) allowing the liquid coolant to circulate through the cooling chamber of the engine (1) and a secondary pipe (3) which bypasses the cooling chamber of the engine (1), characterized in that a two-way valve (4) is positioned on the main pipe (2), at the outlet from the cooling chamber of the engine (1), with the main pipe (2) at the level of its end arranged directly downstream of the pump (5) comprising a distributing gallery (2a) which runs alongside at least a part of the crankcase/cylinder block and/or of the cylinder head of the engine, and which distributes the liquid coolant into several accessory pipes (2b) which lead from the distributing gallery (2a) and which are intended for cooling the engine (1), the gallery (2) does not contribute to an exchange of heat with the engine (1), the liquid coolant which passes through the gallery for distribution (2a) directly exits the pump (5) without performing exchange of heat with the engine (1), and in that the secondary pipe (3) comprises a tapping off the main pipe (2), downstream of the pump (5) and upstream of that portion of the main pipe (2) which contributes to the cooling of the engine (1), so that the flow rate is kept constant and permanent to supply the cooling of at least one consumer (6), the tapping of the secondary pipe (3) is carried out directly on the length of the distributing gallery (2a).
  2. Cooling device for a system for cooling at least one internal combustion engine (1) according to Claim 1, characterized in that the tapping of the secondary pipe (3) off the distribution gallery (2a) is positioned in such a way as to provide an even distribution of flow rates of liquid coolant between the secondary pipe (3) and the various accessory pipes (2b).
  3. Cooling circuit for the thermal regulation of an engine (1) and of at least one consumer (6), comprising a feed pump (5) for displacing a liquid coolant, characterized in that the cooling circuit comprises a thermal regulation device according to Claim 1 or 2, the regulation device on the one hand via its main pipe (2) at the outlet of the engine (1) supplying a first loop (7) which comprises at least one accessory (11) that has to be cooled, and on the other hand via its secondary pipe (3) supplying a second loop (8) which comprises at least one consumer (6) that requires permanent and/or continuous cooling while the engine (1) is running, the second loop (8) opening at its downstream end into the first loop (7) of the cooling circuit.
  4. Cooling circuit for the thermal regulation of an engine (1) and of at least one consumer (6) through the displacement of a liquid coolant according to Claim 3, characterized in that at the outlet from the engine (1), the main pipe (2) supplies a third loop (9) which cools at least one accessory (12, 13, 15, 16), this third loop (9) meeting the first loop (7) upstream of the pump (5), and this third loop (9) comprising a two-way thermostatic valve (10).
  5. Cooling circuit for the thermal regulation of an engine (1) and of at least one consumer (6) through the displacement of a liquid coolant according to Claim 4, characterized in that the third loop (9) meets the first loop (7) via a double-acting thermostatic valve (14) supplied by a pipe (14a) which makes a tapping downstream of the two-way valve (4) of the first loop (7), the double-acting thermostatic valve (14) making it possible to regulate the temperature of the liquid coolant while at the same time maintaining a flow of liquid coolant with a constant flow rate through the engine (1).
  6. Cooling circuit for the thermal regulation of an engine (1) and of at least one consumer (6) through the displacement of a liquid coolant according to one of Claims 3 to 5, characterized in that the consumer (6) requiring permanent and/or continuous cooling is formed of at least one turbocompressor (6a) and/or an exhaust gas recirculation device (6b) and/or in that the first loop (7) contributes to supplying at least one unit heater (11) and/or in that the third loop (9) contributes to supplying at least one radiator (12).
  7. Method of operating a cooling circuit according to one of Claims 3 to 6, characterized in that the method comprises at least one step of closing the two-way valve (4) mounted on the first loop (7) of the cooling circuit in order, on the one hand, to suspend the cooling of the engine (1) and, on the other hand, to maintain constant cooling of at least one consumer (6).
  8. Method of operating a cooling circuit according to one of Claims 3 to 6, characterized in that the method comprises at least one step of opening the two-way valve (4) mounted on the first loop (7) of the cooling circuit in order, on the one hand, to allow the cooling of the engine (1) and, on the other hand, to maintain constant cooling of at least one consumer (6).
  9. Method of operating a cooling circuit according to one of Claims 4 to 6, characterized in that the method comprises at least one step of opening the thermostatic two-way valve (10) mounted on the third loop (9) of the cooling circuit in order, on the one hand, to allow the cooling of the engine (1) and, on the other hand, to allow the cooling of at least one accessory (12, 13) of the third loop (9), while at the same time maintaining constant cooling of at least one consumer (6) using the second loop (8) of the cooling circuit.
EP09752431.8A 2008-09-30 2009-09-30 Cooling circuit for the thermal regulation of an engine independent from other consumers Active EP2329120B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0805384A FR2936566B1 (en) 2008-09-30 2008-09-30 COOLING CIRCUIT FOR THE THERMAL CONTROL OF THE ENGINE INDEPENDENTLY OF OTHER CONSUMERS
PCT/FR2009/051857 WO2010037970A2 (en) 2008-09-30 2009-09-30 Cooling circuit for the thermal regulation of an engine independent from other consumers

Publications (2)

Publication Number Publication Date
EP2329120A2 EP2329120A2 (en) 2011-06-08
EP2329120B1 true EP2329120B1 (en) 2018-12-26

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EP09752431.8A Active EP2329120B1 (en) 2008-09-30 2009-09-30 Cooling circuit for the thermal regulation of an engine independent from other consumers

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US (1) US9689304B2 (en)
EP (1) EP2329120B1 (en)
JP (1) JP5600108B2 (en)
CN (1) CN102197205A (en)
FR (1) FR2936566B1 (en)
WO (1) WO2010037970A2 (en)

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Also Published As

Publication number Publication date
FR2936566B1 (en) 2010-10-15
WO2010037970A3 (en) 2010-06-24
US20110232590A1 (en) 2011-09-29
WO2010037970A2 (en) 2010-04-08
JP2012504205A (en) 2012-02-16
EP2329120A2 (en) 2011-06-08
CN102197205A (en) 2011-09-21
FR2936566A1 (en) 2010-04-02
US9689304B2 (en) 2017-06-27
JP5600108B2 (en) 2014-10-01

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