EP1362169B1 - Device and method for cooling a heat engine control element - Google Patents

Device and method for cooling a heat engine control element Download PDF

Info

Publication number
EP1362169B1
EP1362169B1 EP02704825A EP02704825A EP1362169B1 EP 1362169 B1 EP1362169 B1 EP 1362169B1 EP 02704825 A EP02704825 A EP 02704825A EP 02704825 A EP02704825 A EP 02704825A EP 1362169 B1 EP1362169 B1 EP 1362169B1
Authority
EP
European Patent Office
Prior art keywords
cooling
circuit
valve
engine
radiator
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.)
Expired - Lifetime
Application number
EP02704825A
Other languages
German (de)
French (fr)
Other versions
EP1362169A1 (en
Inventor
Olivier Hibon
René Pannier
Denis Reverseau
Régis GOSSUIN
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1362169A1 publication Critical patent/EP1362169A1/en
Application granted granted Critical
Publication of EP1362169B1 publication Critical patent/EP1362169B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • 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
    • 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
    • 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
    • F01P2007/143—Controlling of coolant flow the coolant being liquid using restrictions
    • 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
    • F01P2050/00—Applications
    • F01P2050/30—Circuit boards
    • 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
    • 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
    • F01P2060/18—Heater
    • F01P2060/185—Heater for alternators or generators

Definitions

  • the present invention relates to a cooling device for a control member of a motor vehicle engine, and to a method for permanently supplying a cooling fluid to a heat exchanger for cooling such an organ. control.
  • the motor vehicle drive motor can be cooled by circulating a coolant, in practice water, which passes through the main parts of the engine to be cooled.
  • the cooling circuit essentially includes a circulation pump driven by the engine and a radiator consisting of a water / air heat exchanger capable of cooling the water circulated by the pump.
  • a thermostatic valve is also generally provided to isolate the portion of the main cooling circuit that contains the radiator during the cold start period where excessive engine cooling is not desired. The thermostatic valve opens gradually according to the temperature of the circulating water, warmed by the engine after the start-up period.
  • the operation of the internal combustion engines requires a fuel supply in the engine cylinders and an exhaust of the burnt gases, these operations being performed by means of valves whose movement is generally controlled by a distribution system adapted to the operating regime of the motor.
  • valves whose movement is generally controlled by a distribution system adapted to the operating regime of the motor.
  • it is planned to control the movement of the various valves by means of an electrohydraulic system called “camless”, in which the movements of the various valves are controlled according to a distribution diagram, the engine load being further controlled by the opening time of the intake valves.
  • valves have a number of disadvantages. In particular, it must be possible to cool the control device properly.
  • the cooling can for example be obtained by a circulation of the cooling water flowing in the main cooling circuit of the engine.
  • the addition, without particular precautions, of a heat exchanger in the main cooling circuit of the engine has the disadvantage that the cooling is not suitably done in a constant manner during the starting phases of the engine when the Thermostatic valve is closed and during normal operating phases when the thermostatic valve is open.
  • Another solution of using an independent cooling circuit also requires an additional electric water pump and at least one solenoid valve, which complicates the overall structure and increases the cost and the risk of breakdowns.
  • the present invention aims to eliminate these difficulties and to ensure the cooling of a control member of a motor vehicle combustion engine, for example the valve control system, which allows constant and permanent cooling whatever the state of the thermostatic valve.
  • the invention also aims to continuously supply a heat exchanger coolant from the main cooling circuit of the engine, regardless of the position of the thermostatic valve.
  • the cooling device of the invention is intended to cooperate with a control member of a motor vehicle combustion engine.
  • the device comprises a main flow circuit of a coolant passing through the engine and including a circulation pump, a thermostatic valve and a radiator.
  • a heat exchanger capable of cooling the control member is mounted in a secondary circuit, downstream of the radiator, between said radiator and the circulation pump.
  • a restriction is mounted in the main circuit in parallel with the exchanger. In this way, a branch of the secondary circuit connecting the exchanger to the restriction, is the coolant flows in one direction or the other, depending on whether the theostatic valve is open or closed.
  • an air-source heat exchanger for heating the passenger compartment of the vehicle is further mounted in the main circuit downstream of the thermostatic valve, with its return pipe connected upstream of the restriction.
  • control member is adapted to act on the engine valves.
  • the invention also relates, in a more general manner, to a process for the permanent supply of cooling liquid to a heat exchanger mounted in a secondary circuit which is bypassed by a main flow circuit, a portion of which can be isolated by a closing valve.
  • a process for the permanent supply of cooling liquid to a heat exchanger mounted in a secondary circuit which is bypassed by a main flow circuit, a portion of which can be isolated by a closing valve.
  • an inversion of the direction of flow in a branch of the secondary circuit is automatically operated as a function of the position of the closure valve, by means of a pressure drop generated in a portion of the main circuit.
  • the valve closes when the temperature of the coolant reaches a predetermined value.
  • the method of the invention is particularly advantageous when the heat exchanger is used to cool a control member of the valves of a heat engine, especially in a motor vehicle.
  • the cooling device of the invention is used in combination with a heat engine shown schematically by the broken frame 1.
  • the heat engine 1 is cooled by a circulation of water flowing in a main flow circuit 2 which includes a circulation pump 3, a thermostatic valve 4 and a radiator 5 placed outside the engine 1.
  • the circuit 2 can be more or less filled with water of cooling through the existence of a filling jar 6 acting as an expansion vessel and mounted in bypass ducts 7 and 8 on the air / water heat exchanger which constitutes the radiator 5.
  • the cooling water conveyed by the pipe 9 passes through the thermostatic valve 4, the opening and closing of which are controlled by an expansion element 4a on which the temperature of the water passing through the thermo valve acts. static 4.
  • the passenger compartment of the motor vehicle which is equipped with the engine 1 comprises a heating device including a heater 10 in the form of an air / water heat exchanger which is supplied with water cooling circuit of the main circuit 2 directly from the thermostatic valve 4 through the pipe 11.
  • the output of the heater 10 is connected by the pipe 11 a to a secondary circuit 13, in which is mounted a heat exchanger 14 capable of cooling the control system of the different valves of the engine 1, this system not being shown in the figure.
  • the outlet pipe 11a from the heater 10 opens at point 12 in a branch 15 of the secondary circuit 13, the branch 15 containing a restriction 16, capable of creating a pressure drop in the flow.
  • the water flowing in the pipe 11a at the outlet of the heater 10 separates at the point 12 in two flows, the first by the branch 15, and the second by a branch 17 of the secondary circuit 13.
  • the heat exchanger 14 receives cooling water through line 18 which is connected to point 19 at branch 17. At the outlet of the exchanger 14, the water returns via the pipe 20 downstream of the restriction 16 to the point 21.
  • the outlet pipe 22 of the restriction 16 returns to the intake of the circulation pump 3 by passing through the motor 1 so to cool the appropriate parts.
  • the circulation of the cooling water in the radiator 5 is done through the supply line 26 whose input is more or less closed by the thermostatic valve 4 depending on the temperature of the cooling water passing through the valve 4.
  • the cooling water passed through the radiator 5 returns via the pipe 27 to the branch 17 of the secondary circuit 13 at point 19.
  • the cooling water does not enter the pipe 26 and therefore does not cross the radiator 5. It is this is shown in fine lines in Figure 2.
  • the cooling water circulated by the pump 3 flows through the pipe 9 through the valve 4, and then through the pipe 11 through the heater 10, the pipes in which the cooling water circulates having been shown in Figure 2 in lines of greater width.
  • the water coming from the pipe 11a separates into two flows.
  • the first branch 15 passes through the restriction 16 which creates a pressure drop, then returns through line 22 on the circulation pump 3.
  • the second flow also returns to the circulation pump 3, this time through the branch 17 then by the heat exchanger 14 through the secondary circuit 13. This second flow avoids the pressure drop due to the restriction 16.
  • the alternator 23 is supplied by the pipe 24 in cooling water from the heater 10.
  • FIG 3 illustrates the different flows in the device of the invention when the thermostatic valve 4 is fully open.
  • all of the cooling water from the heater 10 through line 11a is directed by branch 15 through restriction 16 to return via line 22 to the circulation pump 3.
  • the valve thermostatic 4 being open, the cooling water also flows into the pipe 26, passes through the radiator 5 and back through the pipe 27 to point 19 where the flow separates into two parts.
  • the first part passes through the heat exchanger 14 through the secondary circuit 13 before returning to the circulation pump 3 via the pipe 22.
  • the second part flows through the branch 17, passes through the restriction 16 before return via line 22 to the circulation pump 3.
  • the circulation of the water in the branch 17 has therefore been reversed compared to that which existed when the thermostatic valve 4 was closed, as illustrated in FIG. 2.
  • the flow rate in the radiator 5 is here maximum, as in the exchanger 14.
  • the exchanger 14 is traversed by water which has been cooled by the radiator 5, which improves the cooling of the valve control system.
  • the device of the invention thus makes it possible to obtain an automatic flip-flop of the direction of flow in the branch 17 of the secondary circuit 13, the supply of cooling water for the heat exchanger 14 being done either by the water cooling from the heater 10 or the main cooling circuit in the case where no heater is provided, or by the cooling water from the radiator 5 when the thermostatic valve 4 is open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Air-Conditioning For Vehicles (AREA)

Description

La présente invention est relative à un dispositif de refroidissement pour un organe de commande d'un moteur thermique de véhicule automobile, ainsi qu'à un procédé d'alimentation permanente en liquide de refroidissement d'un échangeur de chaleur destiné à refroidir un tel organe de commande.The present invention relates to a cooling device for a control member of a motor vehicle engine, and to a method for permanently supplying a cooling fluid to a heat exchanger for cooling such an organ. control.

Le moteur d'entraînement des véhicules automobiles peut être refroidi par la mise en circulation d'un liquide de refroidissement, en pratique de l'eau, qui traverse les principales parties du moteur qu'il convient de refroidir. Le circuit de refroidissement inclut essentiellement une pompe de circulation entraînée par le moteur et un radiateur constitué d'un échangeur de chaleur eau/air capable de refroidir l'eau mise en circulation par la pompe. Une vanne thermostatique est également prévue en général, de façon à isoler la partie du circuit principal de refroidissement qui contient le radiateur, pendant la durée du démarrage à froid où un refroidissement excessif du moteur n'est pas souhaité. La vanne thermostatique s'ouvre progressivement en fonction de la température de l'eau mise en circulation, réchauffée par le moteur après la période de démarrage.The motor vehicle drive motor can be cooled by circulating a coolant, in practice water, which passes through the main parts of the engine to be cooled. The cooling circuit essentially includes a circulation pump driven by the engine and a radiator consisting of a water / air heat exchanger capable of cooling the water circulated by the pump. A thermostatic valve is also generally provided to isolate the portion of the main cooling circuit that contains the radiator during the cold start period where excessive engine cooling is not desired. The thermostatic valve opens gradually according to the temperature of the circulating water, warmed by the engine after the start-up period.

Le fonctionnement des moteurs à combustion interne nécessite une alimentation en carburant dans les cylindres du moteur ainsi qu'un échappement des gaz brûlés, ces opérations étant réalisées au moyen de soupapes dont le mouvement est généralement commandé par un système de distribution adapté au régime de fonctionnement du moteur. Dans certains moteurs à combustion, il est prévu de commander le mouvement des différentes soupapes au moyen d'un système électrohydraulique dit "camless", dans lequel les mouvements des différentes soupapes sont pilotés en fonction d'un diagramme de distribution, la charge du moteur étant en outre contrôlée par le temps d'ouverture des soupapes d'admission.The operation of the internal combustion engines requires a fuel supply in the engine cylinders and an exhaust of the burnt gases, these operations being performed by means of valves whose movement is generally controlled by a distribution system adapted to the operating regime of the motor. In certain combustion engines, it is planned to control the movement of the various valves by means of an electrohydraulic system called "camless", in which the movements of the various valves are controlled according to a distribution diagram, the engine load being further controlled by the opening time of the intake valves.

La puissance consommée par un tel système de commande des soupapes entraîne cependant un certain nombre d'inconvénients. Il convient en particulier de pouvoir refroidir convenablement le dispositif de commande.The power consumed by such a control system of However, the valves have a number of disadvantages. In particular, it must be possible to cool the control device properly.

Le refroidissement peut par exemple être obtenu par une circulation de l'eau de refroidissement s'écoulant dans le circuit principal de refroidissement du moteur. L'adjonction, sans précautions particulières, d'un échangeur de chaleur dans le circuit principal de refroidissement du moteur, présente cependant l'inconvénient que le refroidissement ne se fait pas convenablement d'une manière constante pendant les phases de démarrage du moteur lorsque la vanne thermostatique est fermée et pendant les phases de fonctionnement normal où la vanne thermostatique est ouverte. Une autre solution consistant à utiliser un circuit de refroidissement indépendant, nécessite par ailleurs une pompe à eau électrique supplémentaire et au moins une électrovanne, ce qui complique la structure d'ensemble et en augmente le coût ainsi que les risques de pannes.The cooling can for example be obtained by a circulation of the cooling water flowing in the main cooling circuit of the engine. The addition, without particular precautions, of a heat exchanger in the main cooling circuit of the engine, however, has the disadvantage that the cooling is not suitably done in a constant manner during the starting phases of the engine when the Thermostatic valve is closed and during normal operating phases when the thermostatic valve is open. Another solution of using an independent cooling circuit also requires an additional electric water pump and at least one solenoid valve, which complicates the overall structure and increases the cost and the risk of breakdowns.

La présente invention a pour objet de supprimer ces difficultés et d'assurer le refroidissement d'un organe de commande d'un moteur à combustion de véhicule automobile, par exemple du système de pilotage des soupapes, qui permette le refroidissement constant et permanent quel que soit l'état de la vanne thermostatique.The present invention aims to eliminate these difficulties and to ensure the cooling of a control member of a motor vehicle combustion engine, for example the valve control system, which allows constant and permanent cooling whatever the state of the thermostatic valve.

L'invention a également pour objet d'alimenter en permanence un échangeur de chaleur en liquide de refroidissement provenant du circuit principal de refroidissement du moteur, et ce quelle que soit la position de la vanne thermostatique.The invention also aims to continuously supply a heat exchanger coolant from the main cooling circuit of the engine, regardless of the position of the thermostatic valve.

Le dispositif de refroidissement de l'invention est destiné à coopérer avec un organe de commande d'un moteur à combustion de véhicule automobile. Le dispositif comprend un circuit principal d'écoulement d'un liquide de refroidissement traversant le moteur et incluant une pompe de circulation, une vanne thermostatique et un radiateur. Un échangeur de chaleur capable de refroidir l'organe de comande est monté dans un circuit secondaire, en aval du radiateur, entre ledit radiateur et la pompe de circulation. Une restriction est montée dans le circuit principal en parallèle de l'échangeur. De cette manière, une branche du circuit secondaire reliant l'échangeur à la restriction, est traversée par le liquide de refroidissement dans un sens ou dans l'autre selon que la vanne theimostatique est ouverte ou fermée.The cooling device of the invention is intended to cooperate with a control member of a motor vehicle combustion engine. The device comprises a main flow circuit of a coolant passing through the engine and including a circulation pump, a thermostatic valve and a radiator. A heat exchanger capable of cooling the control member is mounted in a secondary circuit, downstream of the radiator, between said radiator and the circulation pump. A restriction is mounted in the main circuit in parallel with the exchanger. In this way, a branch of the secondary circuit connecting the exchanger to the restriction, is the coolant flows in one direction or the other, depending on whether the theostatic valve is open or closed.

On obtient ainsi de façon simple un basculement automatique de l'alimentation de l'échangeur en liquide de refroidissement. De plus, l'échangeur est alimenté en liquide de refroidissement à température inférieure lorsque la vanne thermostatique est ouverte, ce qui est le cas le plus fréquent.This provides a simple way to automatically switch the supply of the exchanger coolant. In addition, the exchanger is supplied with coolant at lower temperature when the thermostatic valve is open, which is the most common case.

Dans un mode de réalisation préféré, un échangeur aérothermique destiné au réchauffement de l'habitacle du véhicule est en outre monté dans le circuit principal en aval de la vanne thermostatique, avec sa canalisation de retour reliée en amont de la restriction.In a preferred embodiment, an air-source heat exchanger for heating the passenger compartment of the vehicle is further mounted in the main circuit downstream of the thermostatic valve, with its return pipe connected upstream of the restriction.

Dans une utilisation préférée de l'invention, l'organe de commande est conçu pour agir sur les soupapes du moteur.In a preferred use of the invention, the control member is adapted to act on the engine valves.

L'invention concerne également, de manière plus générale, un procédé d'alimentation permanente en liquide de refroidissement d'un échangeur de chaleur monté dans un circuit secondaire en dérivation d' un circuit principal d'écoulement dont une partie peut être isolée par une vanne de fermeture. Selon ce procédé, une inversion du sens de l'écoulement dans une branche du circuit secondaire, est automatiquement opérée en fonction de la position de la vanne de fermeture, au moyen d'une perte de charge générée dans une portion du circuit principal.The invention also relates, in a more general manner, to a process for the permanent supply of cooling liquid to a heat exchanger mounted in a secondary circuit which is bypassed by a main flow circuit, a portion of which can be isolated by a closing valve. According to this method, an inversion of the direction of flow in a branch of the secondary circuit is automatically operated as a function of the position of the closure valve, by means of a pressure drop generated in a portion of the main circuit.

Dans un mode d'utilisation préféré, la vanne se ferme lorsque la température du liquide de refroidissement atteint une valeur déterminée.In a preferred mode of use, the valve closes when the temperature of the coolant reaches a predetermined value.

Le procédé de l'invention est particulièrement avantageux lorsque l'échangeur de chaleur est utilisé pour refroidir un organe de commande des soupapes d'un moteur thermique, notamment dans un véhicule automobile.The method of the invention is particularly advantageous when the heat exchanger is used to cool a control member of the valves of a heat engine, especially in a motor vehicle.

L'invention sera mieux comprise à l'étude d'un mode de réalisation particulier pris à titre d'exemple nullement limitatif et illustré par les dessins annexés, sur lesquels :

  • la figure 1 représente schématiquement un dispositif de refroidissement selon l'invention;
  • la figure 2 illustre la circulation du liquide de refroidissement dans le dispositif illustré sur la figure 1, lorsque la vanne thermostatique est fermée; et
  • la figure 3 illustre schématiquement la circulation du liquide de refroidissement dans le dispositif illustré sur la figure 1, lorsque la vanne thermostatique est ouverte.
The invention will be better understood by studying a particular embodiment taken by way of nonlimiting example and illustrated by the appended drawings, in which:
  • Figure 1 schematically shows a cooling device according to the invention;
  • FIG. 2 illustrates the circulation of the coolant in the device illustrated in FIG. 1, when the thermostatic valve is closed; and
  • Figure 3 schematically illustrates the circulation of the coolant in the device shown in Figure 1, when the thermostatic valve is open.

Tel qu'il est représenté sur la figure 1, de manière schématique, le dispositif de refroidissement de l'invention est utilisé en association avec un moteur thermique schématisé par le cadre en tirets 1. Le moteur thermique 1 est refroidi par une circulation d'eau s'écoulant dans un circuit principal d'écoulement 2 qui inclut une pompe de circulation 3, une vanne thermostatique 4 et un radiateur 5 placé à l'extérieur du moteur 1. Le circuit 2 peut être plus ou moins rempli d'eau de refroidissement grâce à l'existence d'un bocal de remplissage 6 jouant le rôle de vase d'expansion et monté en dérivation par les conduits 7 et 8 sur l'échangeur de chaleur air/eau qui constitue le radiateur 5. A la sortie de la pompe de circulation 3, l'eau de refroidissement véhiculée par la conduite 9, traverse la vanne thermostatique 4 dont l'ouverture et la fermeture sont commandées par un élément à dilatation 4a sur lequel agit la température de l'eau traversant la vanne thermostatique 4.As shown in Figure 1, schematically, the cooling device of the invention is used in combination with a heat engine shown schematically by the broken frame 1. The heat engine 1 is cooled by a circulation of water flowing in a main flow circuit 2 which includes a circulation pump 3, a thermostatic valve 4 and a radiator 5 placed outside the engine 1. The circuit 2 can be more or less filled with water of cooling through the existence of a filling jar 6 acting as an expansion vessel and mounted in bypass ducts 7 and 8 on the air / water heat exchanger which constitutes the radiator 5. At the exit of the circulation pump 3, the cooling water conveyed by the pipe 9, passes through the thermostatic valve 4, the opening and closing of which are controlled by an expansion element 4a on which the temperature of the water passing through the thermo valve acts. static 4.

Dans l'exemple illustré sur la figure 1, l'habitacle du véhicule automobile qui est équipé du moteur 1 comprend un dispositif de chauffage incluant un aérotherme 10 sous la forme d'un échangeur de chaleur air/eau qui est alimenté par l'eau de refroidissement du circuit principal 2 provenant directement de la vanne thermostatique 4 par la conduite 11. La sortie de l'aérotherme 10 est reliée par la conduite 11 a à un circuit secondaire 13, dans lequel est monté un échangeur de chaleur 14 capable de refroidir le système de pilotage des différentes soupapes du moteur 1, ce système n'étant pas représenté sur la figure. La conduite de sortie 11a provenant de l'aérotherme 10 débouche au point 12 dans une branche 15 du circuit secondaire 13, la branche 15 contenant une restriction 16, capable de créer une perte de charge dans l'écoulement. L'eau s'écoulant dans la conduite 11a à la sortie de l'aérotherme 10 se sépare au point 12 en deux flux, le premier par la branche 15, et le deuxième par une branche 17 du circuit secondaire 13.In the example illustrated in FIG. 1, the passenger compartment of the motor vehicle which is equipped with the engine 1 comprises a heating device including a heater 10 in the form of an air / water heat exchanger which is supplied with water cooling circuit of the main circuit 2 directly from the thermostatic valve 4 through the pipe 11. The output of the heater 10 is connected by the pipe 11 a to a secondary circuit 13, in which is mounted a heat exchanger 14 capable of cooling the control system of the different valves of the engine 1, this system not being shown in the figure. The outlet pipe 11a from the heater 10 opens at point 12 in a branch 15 of the secondary circuit 13, the branch 15 containing a restriction 16, capable of creating a pressure drop in the flow. The water flowing in the pipe 11a at the outlet of the heater 10 separates at the point 12 in two flows, the first by the branch 15, and the second by a branch 17 of the secondary circuit 13.

L'échangeur de chaleur 14 reçoit de l'eau de refroidissement par la conduite 18 qui est reliée au point 19 à la branche 17. En sortie de l'échangeur 14, l'eau revient par la conduite 20 en aval de la restriction 16 au point 21. La conduite de sortie 22 de la restriction 16 revient sur l'admission de la pompe de circulation 3 en traversant le moteur 1 de façon à en refroidir les parties appropriées.The heat exchanger 14 receives cooling water through line 18 which is connected to point 19 at branch 17. At the outlet of the exchanger 14, the water returns via the pipe 20 downstream of the restriction 16 to the point 21. The outlet pipe 22 of the restriction 16 returns to the intake of the circulation pump 3 by passing through the motor 1 so to cool the appropriate parts.

Dans le mode de réalisation illustré sur la figure 1, on a également représenté un alternateur 23 refroidi par circulation d'eau et alimenté par la conduite 24 branchée sur la conduite 11a en sortie de l'aérotherme 10, l'eau de refroidissement revenant par la conduite 25 après avoir traversé l'alternateur 23 sur la conduite 22 en amont de l'admission de la pompe de circulation 3.In the embodiment illustrated in Figure 1, there is also shown an alternator 23 cooled by water circulation and supplied by the pipe 24 connected to the pipe 11a at the outlet of the heater 10, the cooling water returning through the pipe 25 after passing through the alternator 23 on the pipe 22 upstream of the inlet of the circulation pump 3.

La circulation de l'eau de refroidissement dans le radiateur 5 se fait grâce à la conduite d'alimentation 26 dont l'entrée est plus ou moins obturée par la vanne thermostatique 4 en fonction de la température de l'eau de refroidissement traversant la vanne 4. L'eau de refroidissement ayant traversé le radiateur 5 revient par la conduite 27 sur la branche 17 du circuit secondaire 13 au point 19.The circulation of the cooling water in the radiator 5 is done through the supply line 26 whose input is more or less closed by the thermostatic valve 4 depending on the temperature of the cooling water passing through the valve 4. The cooling water passed through the radiator 5 returns via the pipe 27 to the branch 17 of the secondary circuit 13 at point 19.

Le fonctionnement du dispositif illustré sur la figure 1 est le suivant, en référence aux figures 2 et 3.The operation of the device illustrated in Figure 1 is as follows, with reference to Figures 2 and 3.

Lorsque la vanne thermostatique 4 est fermée, c'est-à-dire pendant la phase de démarrage à froid du moteur 1, l'eau de refroidissement ne pénètre pas dans la conduite 26 et ne traverse donc pas le radiateur 5. C'est ce qui a été représenté en traits fins sur la figure 2. Au contraire, l'eau de refroidissement mise en circulation par la pompe 3 s'écoule par la conduite 9 à travers la vanne 4, puis par la conduite 11 à travers l'aérotherme 10, les conduites dans lesquelles circule l'eau de refroidissement ayant été représentées sur la figure 2 en traits de plus grande largeur. A la sortie de l'aérotherme 10, l'eau provenant de la conduite 11 a se sépare en deux flux. Le premier par la branche 15 traverse la restriction 16 qui crée une perte de charge, puis revient par la conduite 22 sur la pompe de circulation 3. Le deuxième flux retourne également à la pompe de circulation 3, cette fois en passant par la branche 17 puis par l'échangeur de chaleur 14 en traversant le circuit secondaire 13. Ce deuxième flux évite la perte de charge due à la restriction 16. Indépendamment, l'alternateur 23 est alimenté par la conduite 24 en eau de refroidissement provenant de l'aérotherme 10.When the thermostatic valve 4 is closed, that is to say during the cold start phase of the engine 1, the cooling water does not enter the pipe 26 and therefore does not cross the radiator 5. It is this is shown in fine lines in Figure 2. In contrast, the cooling water circulated by the pump 3 flows through the pipe 9 through the valve 4, and then through the pipe 11 through the heater 10, the pipes in which the cooling water circulates having been shown in Figure 2 in lines of greater width. At the outlet of the heater 10, the water coming from the pipe 11a separates into two flows. The first branch 15 passes through the restriction 16 which creates a pressure drop, then returns through line 22 on the circulation pump 3. The second flow also returns to the circulation pump 3, this time through the branch 17 then by the heat exchanger 14 through the secondary circuit 13. This second flow avoids the pressure drop due to the restriction 16. Independently, the alternator 23 is supplied by the pipe 24 in cooling water from the heater 10.

La figure 3 illustre les différents écoulements dans le dispositif de l'invention lorsque la vanne thermostatique 4 est complètement ouverte. Dans ce cas, la totalité de l'eau de refroidissement provenant de l'aérotherme 10 par la conduite 11a se dirige par la branche 15 à travers la restriction 16 pour revenir par la conduite 22 à la pompe de circulation 3. Mais, la vanne thermostatique 4 étant ouverte, l'eau de refroidissement s'écoule également dans la conduite 26, traverse le radiateur 5 et revient par la conduite 27 jusqu'au point 19 où le flux se sépare en deux parties. La première partie traverse l'échangeur de chaleur 14 par le circuit secondaire 13 avant de revenir à la pompe de circulation 3 par la conduite 22. La deuxième partie, au contraire, s'écoule par la branche 17, traverse la restriction 16 avant de revenir par la conduite 22 à la pompe de circulation 3.Figure 3 illustrates the different flows in the device of the invention when the thermostatic valve 4 is fully open. In this case, all of the cooling water from the heater 10 through line 11a is directed by branch 15 through restriction 16 to return via line 22 to the circulation pump 3. But, the valve thermostatic 4 being open, the cooling water also flows into the pipe 26, passes through the radiator 5 and back through the pipe 27 to point 19 where the flow separates into two parts. The first part passes through the heat exchanger 14 through the secondary circuit 13 before returning to the circulation pump 3 via the pipe 22. The second part, on the other hand, flows through the branch 17, passes through the restriction 16 before return via line 22 to the circulation pump 3.

La circulation de l'eau dans la branche 17 a donc été inversée par rapport à celle qui existait lorsque la vanne thermostatique 4 était fermée, comme illustré sur la figure 2. Le débit dans le radiateur 5 est ici maximal, comme dans l'échangeur de chaleur 14. De plus, l'échangeur 14 est traversé par de l'eau qui a été refroidie par le radiateur 5, ce qui améliore le refroidissement du système de commande des soupapes.The circulation of the water in the branch 17 has therefore been reversed compared to that which existed when the thermostatic valve 4 was closed, as illustrated in FIG. 2. The flow rate in the radiator 5 is here maximum, as in the exchanger 14. In addition, the exchanger 14 is traversed by water which has been cooled by the radiator 5, which improves the cooling of the valve control system.

Au cours de la phase d'ouverture progressive de la vanne thermostatique 4, le flux d'eau de refroidissement provenant de l'aérotherme 10 continue, comme illustré sur la figure 2, mais le flux d'eau de refroidissement provenant du radiateur 5 commence, comme illustré sur la figure 3. Le débit d'eau de refroidissement commence à augmenter dans l'échangeur de chaleur 14 et le flux s'inverse progressivement dans la branche 17. On constate que cette inversion se produit à partir d'environ 5% d'ouverture de la vanne thermostatique 4.During the progressive opening phase of the thermostatic valve 4, the flow of cooling water from the heater 10 continues, as shown in FIG. 2, but the flow of cooling water from the radiator 5 begins as shown in FIG. 3. The flow of cooling water begins to increase in the heat exchanger 14 and the flow is gradually reversed in the branch 17. It is found that this inversion occurs from about 5 % opening of the thermostatic valve 4.

Le dispositif de l'invention permet ainsi d'obtenir une bascule automatique du sens d'écoulement dans la branche 17 du circuit secondaire 13, l'alimentation en eau de refroidissement de l'échangeur de chaleur 14 se faisant, soit par l'eau de refroidissement en provenance de l'aérotherme 10 ou du circuit principal de refroidissement dans le cas où aucun aérotherme n'est prévu, soit par l'eau de refroidissement provenant du radiateur 5 lorsque la vanne thermostatique 4 est ouverte.The device of the invention thus makes it possible to obtain an automatic flip-flop of the direction of flow in the branch 17 of the secondary circuit 13, the supply of cooling water for the heat exchanger 14 being done either by the water cooling from the heater 10 or the main cooling circuit in the case where no heater is provided, or by the cooling water from the radiator 5 when the thermostatic valve 4 is open.

Ce basculement automatique est obtenu d'une façon extrêmement simple sans nécessiter l'adjonction d'une quelconque pompe électrique supplémentaire, ni d'une quelconque électrovanne. L'absence de pièce en mouvement ou de composant spécifique supprime tous risques de panne. De plus, l'alimentation en eau de refroidissement de l'échangeur de chaleur 14 se fait de façon permanente et au moyen d'eau provenant du radiateur, c'est-à-dire après refroidissement lorsque la vanne thermostatique est ouverte, en fonctionnement normal du moteur.This automatic failover is obtained in a way extremely simple without requiring the addition of any additional electric pump, or any solenoid valve. The absence of moving parts or specific components eliminates any risk of failure. In addition, the cooling water supply of the heat exchanger 14 is made permanently and by means of water from the radiator, that is to say after cooling when the thermostatic valve is open, in operation. normal engine.

Bien que dans l'exemple illustré, on ait représenté l'adjonction d'un échangeur aérothermique 10, on comprendra que le dispositif de l'invention puisse également fonctionner en l'absence de cet échangeur, l'eau de refroidissement issue de la vanne thermostatique 4 revenant alors directement sur le circuit secondaire 13.Although in the example illustrated, there is shown the addition of a heat exchanger 10, it will be understood that the device of the invention can also operate in the absence of this exchanger, the cooling water from the valve thermostatic 4 then returning directly to the secondary circuit 13.

Claims (6)

  1. Device for cooling a control element of a motor vehicle combustion engine, comprising a principal coolant flow circuit which passes through the engine (1) and includes a circulation pump (3), a thermostatic valve (4) and a radiator (5), characterized in that a heat exchanger (14) capable of cooling the control element is mounted in a secondary circuit (13), downstream of the radiator, between the said radiator (5) and the circulation pump (3), and in that a restriction (16) is mounted in the principal circuit in parallel with the exchanger (14), a branch (17) of the secondary circuit which connects the exchanger (14) to the restriction (16) being traversed by the coolant in one direction or the other depending on whether the thermostatic valve (4) is open or closed.
  2. Device according to Claim 1, characterized in that an aerothermal exchanger (10) intended for heating the vehicle cabin is mounted in the principal circuit downstream of the thermostatic valve (4), with its return line (11a) connected upstream of the restriction.
  3. Device according to Claim 1 or 2, characterized in that the control element acts on the valves of the engine.
  4. Method for permanently supplying a coolant to a heat exchanger (14) mounted in a secondary circuit (13) shunt-connected to a principal flow circuit (2), part of which can be isolated by a shut-off valve (4), in which method an inversion of the direction of flow in a branch (17) of the secondary circuit is automatically produced as a function of the position of the shut-off valve (4), by means of a pressure drop generated in a portion of the principal circuit.
  5. Method according to Claim 4, characterized in that the valve (4) closes when the temperature of the coolant reaches a specified value.
  6. Method according to Claim 4 or 5, characterized in that the heat exchanger (14) is used for cooling a control element which controls the valves of a combustion engine.
EP02704825A 2001-02-19 2002-02-14 Device and method for cooling a heat engine control element Expired - Lifetime EP1362169B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0102225 2001-02-19
FR0102225A FR2821120B1 (en) 2001-02-19 2001-02-19 DEVICE AND METHOD FOR COOLING A CONTROL UNIT OF A HEAT ENGINE
PCT/FR2002/000560 WO2002066804A1 (en) 2001-02-19 2002-02-14 Device and method for cooling a heat engine control element

Publications (2)

Publication Number Publication Date
EP1362169A1 EP1362169A1 (en) 2003-11-19
EP1362169B1 true EP1362169B1 (en) 2006-09-06

Family

ID=8860184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02704825A Expired - Lifetime EP1362169B1 (en) 2001-02-19 2002-02-14 Device and method for cooling a heat engine control element

Country Status (5)

Country Link
EP (1) EP1362169B1 (en)
DE (1) DE60214515T2 (en)
ES (1) ES2266450T3 (en)
FR (1) FR2821120B1 (en)
WO (1) WO2002066804A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875885B1 (en) * 2004-09-27 2006-12-01 Renault Sas COOLING DEVICE FOR AUTOMATIC GEARBOX OF MOTOR VEHICLE AND ASSOCIATED METHOD
FR2883807B1 (en) * 2005-04-01 2008-09-12 Renault Sas DEVICE AND METHOD FOR COOLING THE ENGINE AND A VEHICLE ORGAN
ES2334616A1 (en) * 2008-02-04 2010-03-12 Universidade De Santiago De Compostela Superconducting current limiter integrated in the heat exchanger of a thermoacoustic refrigerator
FR2945482B1 (en) * 2009-05-18 2011-05-06 Peugeot Citroen Automobiles Sa ADJUSTABLE RESTRICTION, CIRCUIT CIRCUIT OF A FLUID AND VEHICLE EQUIPPED WITH THIS RESTRICTION

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341041A1 (en) * 1976-02-10 1977-09-09 Chausson Usines Sa DEVICE FOR REGULATING THE TEMPERATURE OF A SUPERCHARGED DIESEL ENGINE
FR2659127B1 (en) * 1990-03-05 1992-07-03 Peugeot FOUR-WAY CONNECTION OF COMPACT FORM AND ITS USE ON THE COOLING CIRCUIT OF A MOTOR VEHICLE.
JP3555269B2 (en) * 1995-08-31 2004-08-18 株式会社デンソー Vehicle cooling water temperature control system
FR2748428B1 (en) * 1996-05-07 1998-06-19 Renault COOLING SYSTEM FOR HYBRID PROPULSION VEHICLE
JP3111922B2 (en) * 1997-04-02 2000-11-27 トヨタ自動車株式会社 Cylinder head structure of internal combustion engine equipped with solenoid valve

Also Published As

Publication number Publication date
ES2266450T3 (en) 2007-03-01
FR2821120B1 (en) 2003-04-18
WO2002066804A1 (en) 2002-08-29
FR2821120A1 (en) 2002-08-23
EP1362169A1 (en) 2003-11-19
DE60214515T2 (en) 2007-02-15
DE60214515D1 (en) 2006-10-19

Similar Documents

Publication Publication Date Title
EP1615791B1 (en) Method and device for heating a motor vehicle cabin
EP2106999B2 (en) Ship equipped with thermal energy recovery means
FR2745033A1 (en) COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE
EP2329120B1 (en) Cooling circuit for the thermal regulation of an engine independent from other consumers
EP1567754B1 (en) Device for the thermal regulation of the intake air for an engine and the recirculated exhaust gas emitted by said engine
EP2112347B1 (en) Engine cooling circuit
EP2069620A2 (en) Device for distributing cooling fluid in a motor vehicle engine
WO2003036074A1 (en) Fuel injection system for a diesel engine with recycling
EP1362169B1 (en) Device and method for cooling a heat engine control element
EP1892389B1 (en) Device making it possible to control a circuit for circulation of a coolant liquid and a circuit for circulation of lubrication oil of a heat engine of a vehicle
WO2006070080A1 (en) Thermal energy management system for a vehicle heat engine provided with a time-delay switching means
EP0670414B1 (en) Cooling system for an internal combustion engine
EP1892398A1 (en) Device making it possible to control a circuit for circulation of a coolant liquid and a circuit for circulation of lubrication oil of a heat engine of a vehicle
EP3864269B1 (en) Cooling system for a combustion engine and method of controlling the same
EP0850791B1 (en) Heating system for the passenger compartment of a diesel combustion engine motor vehicle
FR2691504A1 (en) Cooling device for a heat engine comprising a condenser.
FR3091898A1 (en) COOLING CIRCUIT OF A THERMAL ENGINE EQUIPPED WITH A HEAT RECOVERY CIRCUIT
FR2800016A1 (en) Cooling device for vehicle IC engine comprises an heating branch connecting delivery side of the fluid pump to the engine exhaust and a selection member disposed at the intersection of the branching conduit and the exit conduit
FR2880067A1 (en) Gas temperature controlling installation for motor vehicle`s e.g. diesel engine, has valve adjusting flow of hot and cold liquids from main and secondary loops to make pass into cooler`s inlet, based on liquid temperature in cooler`s outlet
FR2875885A1 (en) Automatic transmission cooling system for motor vehicle, has two conduits connecting control unit to main circuit conduit upstream of calibrating unit, where direction of fluid flow in main conduit is controlled by position of control unit
FR2864150A1 (en) Heat energy controlling system for motor vehicle, has switching units activated sequentially during passage of system from disconnected to connected configurations in which radiator is linked to low and high temperature circuits
FR2865004A1 (en) Intake air temperature control device for motor vehicle`s internal combustion engine, has secondary circuit connected to main circuit such that liquid flow in secondary circuit is independent of liquid flow in main circuit
BE386147A (en)
FR3066537A1 (en) METHOD FOR CONTROLLING A LUBRICATING OIL TEMPERATURE OF A THERMAL MOTOR AT TWO OUTPUT FLOWS
FR2934318A1 (en) Engine i.e. internal combustion engine, cooling device for vehicle, has actuator for piloting opening and closing of first and second outlets, and closing assembly including check valves for closing second outlet and piloted by actuator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030612

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060906

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 60214515

Country of ref document: DE

Date of ref document: 20061019

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20061025

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2266450

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070607

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130218

Year of fee payment: 12

Ref country code: ES

Payment date: 20130227

Year of fee payment: 12

Ref country code: DE

Payment date: 20130219

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60214515

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140214

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60214515

Country of ref document: DE

Effective date: 20140902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140214

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140902

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20150406

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140215