EP0374038A1 - Cooling device for an internal-combustion engine - Google Patents

Cooling device for an internal-combustion engine Download PDF

Info

Publication number
EP0374038A1
EP0374038A1 EP89403455A EP89403455A EP0374038A1 EP 0374038 A1 EP0374038 A1 EP 0374038A1 EP 89403455 A EP89403455 A EP 89403455A EP 89403455 A EP89403455 A EP 89403455A EP 0374038 A1 EP0374038 A1 EP 0374038A1
Authority
EP
European Patent Office
Prior art keywords
cooling device
engine
liquid
valve
degassing chamber
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.)
Granted
Application number
EP89403455A
Other languages
German (de)
French (fr)
Other versions
EP0374038B1 (en
Inventor
Emmanuel Rupp
Jean-Claude Antoviaque
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0374038A1 publication Critical patent/EP0374038A1/en
Application granted granted Critical
Publication of EP0374038B1 publication Critical patent/EP0374038B1/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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0285—Venting devices
    • 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration devices
    • 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 cooling circuit of an internal combustion engine must necessarily include a degassing device because one cannot ensure an absolute seal between the interior of the cylinders and the water chambers. You can degas the engine itself.
  • the volume of liquid to be heated is then significantly increased as soon as the engine is started, as this involves heating the liquid contained in the expansion tank as soon as it is started; the temperature rise of this engine and of its cooling circuit is therefore delayed, which increases external pollution due to the prolonged use of cold enrichment systems and, consequently, also increases fuel consumption and, in the case of a vehicle engine, interferes with heating of the vehicle interior.
  • French Patent 2,317,489 describes a liquid cooling device for an internal combustion engine which provides degassing of the cooling circuit as soon as the engine is started while minimizing the volume of the coolant to be heated after this start-up. market.
  • This cooling device comprises a main cooling circuit comprising a radiator connected to the engine by a liquid inlet pipe and a return pipe, means for circulating the liquid between the engine and the radiator, and a thermostatic valve suitable for interrupt the circulation of the liquid when the temperature thereof is below a given value, a secondary cooling circuit mounted in parallel with the main circuit and comprising a low-volume degassing chamber connected to the engine by a liquid inlet pipe and a flow, and means for circulating the liquid between the engine and the degassing chamber, and an expansion tank connected to one of the cooling circuits.
  • the cooling device is characterized in that the expansion tank is connected to the main cooling circuit and in that one of the walls of the degassing chamber has an orifice connected to the expansion tank by through a valve arranged to open when gas is present in the chamber; when the valve opens, the gas from the degassing chamber thus escapes to the expansion tank.
  • the degassing chamber is arranged under the expansion vessel and the orifice allows direct communication between the upper part of the degassing chamber and the lower part of the expansion vessel.
  • an internal combustion engine 1 which comprises a main cooling circuit comprising a pump 2.
  • the degassing chamber 14 has a circular section and the conduits 17 and 18 are of small section, less than that of the conduits 3 and 5, and open tangentially.
  • the degassing chamber 14 is disposed under the expansion vessel 8 and adjoined to it by its upper part, the upper wall of the chamber constituting a part of the lower wall 19 of the vessel; it has a small section orifice 20 through which it can communicate directly with the expansion tank and which can be closed by a valve 21.
  • the apparent density of this valve is slightly less than or equal to the density of the coolant. It is connected at its upper part by an arm 22 to retaining arms 23 which limit its downward stroke by abutting against the partition 19.
  • the valve 6 When the cold engine starts, the valve 6 is closed, so that there is no circulation in the radiator 4.
  • the only liquid which passes through the expansion tank 8 is that which reaches it through the orifice 20
  • the pressure P in the expansion tank 8 is practically identical to the suction pressure.
  • the pressure P ′ in the chamber 14 is intermediate between the pressure in the engine before the valve 6, itself close to the discharge pressure of the pump 2, and the suction pressure of this pump.
  • the pressure P ′ in the chamber 14 is therefore greater than the pressure P in the expansion tank.
  • valve 21 is constituted by a spherical body, which can be retained by the arms 23 of which it is integral and the orifice 20 is formed in a flat part of the partition 19. But in the embodiment of Figure 3, the orifice 20 is formed in a spherical portion 19 a of the partition 19 and the seal 21 is retained by arms 24 integral with the partition.
  • a tranquilization grid 25 can optionally be provided under the valve.
  • the valve is constituted by a cylindrical mass 26 which carries at its upper part a finger 27 adapted to close the orifice 20 which is formed in a truncated part that or spherical 19 b of the partition 19.
  • the mass 26 is guided and retained by the arms 24 secured to the partition 19.
  • the tranquilization grid 25 attached to the arms 24 is also provided in this embodiment.
  • Figure 5 illustrates an embodiment similar to that of Figure 4.
  • the valve 30 is movable in a space limited by a frustoconical or spherical part 19 c of the wall 19, the arms 24 and the tranquilization grid 25 It consists of a body 31 extended by an upper part 32 and a lower part 33 of smaller dimensions.
  • the part 32 carries the finger 27 and it is guided by centering arms 34.
  • the lower part 33 is in the shape of a cross and it passes through an orifice 35 of the grid 25.
  • the lower face of the body 31 has a part 36 in the shape of a truncated cone to avoid accidental sticking to the grid 25.

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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Device for the liquid cooling of an internal-combustion engine having a main cooling circuit comprising a radiator (4) connected to the engine (1) by means of a liquid intake pipe (5) and a return pipe (3), means (2) for circulating the liquid between the engine (1) and the radiator (4), and a thermostatic valve (6) capable of interrupting the circulation of liquid when the temperature of the latter is below a given value, at least one secondary cooling circuit connected in parallel with the main circuit and comprising a low-volume degassing chamber (14) connected to the engine (1) by means of a liquid intake pipe (17) and an offtake pipe (18), and means (2) for circulating the liquid between the engine (1) and the degassing chamber (14), and an expansion vessel (8) connected to one of the cooling circuits. The expansion vessel (8) is connected to the main cooling circuit, and one (19) of the walls of the degassing chamber (14) has a port (20) connected to the expansion vessel (8) by means of a shutter (21 or 26) designed to open when gas is present in the chamber (14). <IMAGE>

Description

Le circuit de refroidissement d'un moteur à combustion interne doit nécessairement comporter un dispositif de dégazage car on ne peut assurer une étanchéité absolue entre l'intérieur des cylindres et les chambres d'eau. On peut dégazer le moteur lui-même. Mais on augmente alors de façon importante le volume de liquide a chauf­fer dès le démarrage du moteur car ceci implique de chauffer le liquide contenu dans le vase d'expansion dès la mise en marche; on retarde donc la montée en température de ce moteur et de son circuit de refroidis­sement, ce qui augmente la pollution extérieure à cause de l'utilisation prolongée des systèmes d'enrichisse­ment à froid et, par voie de conséquence, augmente aussi la consommation de carburant et, dans le cas d'un moteur de véhicule, nuit au chauffage de l'habitacle du véhicule.The cooling circuit of an internal combustion engine must necessarily include a degassing device because one cannot ensure an absolute seal between the interior of the cylinders and the water chambers. You can degas the engine itself. However, the volume of liquid to be heated is then significantly increased as soon as the engine is started, as this involves heating the liquid contained in the expansion tank as soon as it is started; the temperature rise of this engine and of its cooling circuit is therefore delayed, which increases external pollution due to the prolonged use of cold enrichment systems and, consequently, also increases fuel consumption and, in the case of a vehicle engine, interferes with heating of the vehicle interior.

On peut également dégazer le radiateur. Mais, toujours dans le but d'arriver rapidement aux températures nor­males de fonctionnement, on ne fait pas circuler le liquide de refroidissement dans le radiateur dès la mise en marche du moteur. On peut par exemple utiliser une vanne thermostatique qui empêche la circulation du liquide lorsque la température de celui-ci est infé­rieure a une valeur donnée. Cette circulation ne s'éta­blit donc qu'après la période de démarrage et le déga­zage n'intervient qu'à ce moment-là, ce qui est un inconvénient.You can also degas the radiator. However, always with the aim of quickly reaching normal operating temperatures, the coolant is not circulated in the radiator as soon as the engine is started. One can for example use a thermostatic valve which prevents the circulation of the liquid when the temperature of this one is lower than a given value. This circulation is therefore only established after the start-up period and degassing only takes place at this time, which is a drawback.

Le brevet français 2 317 489 décrit un dispositif de refroidissement par liquide d'un moteur à combustion interne qui assure un dégazage du circuit de refroi­dissement dès la mise en marche du moteur tout en mini­misant le volume du liquide de refroidissement à chauf­fer après cette mise en marche. Ce dispositif de re­froidissement comporte un circuit principal de refroi­dissement comprenant un radiateur relié au moteur par un conduit d'arrivée du liquide et un conduit de re­tour, des moyens pour faire circuler le liquide entre le moteur et le radiateur, et une vanne thermostati­que propre à interrompre la circulation du liquide lorsque la température de celui-ci est inférieure a une valeur donnée, un circuit secondaire de refroi­dissement monté en parallèle avec le circuit principal et comprenant une chambre de dégazage de faible volume reliée au moteur par un conduit d'arrivée de liquide et un conduit de départ, et des moyens pour faire cir­culer le liquide entre le moteur et la chambre de dé­gazage, et un vase d'expansion relié à l'un des cir­cuits de refroidissement.French Patent 2,317,489 describes a liquid cooling device for an internal combustion engine which provides degassing of the cooling circuit as soon as the engine is started while minimizing the volume of the coolant to be heated after this start-up. market. This cooling device comprises a main cooling circuit comprising a radiator connected to the engine by a liquid inlet pipe and a return pipe, means for circulating the liquid between the engine and the radiator, and a thermostatic valve suitable for interrupt the circulation of the liquid when the temperature thereof is below a given value, a secondary cooling circuit mounted in parallel with the main circuit and comprising a low-volume degassing chamber connected to the engine by a liquid inlet pipe and a flow, and means for circulating the liquid between the engine and the degassing chamber, and an expansion tank connected to one of the cooling circuits.

La présente invention a pour objet un perfectionnement apporté à ce dispositif de refroidissement. Selon l'in­vention, le dispositif de refroidissement est caracté­risé en ce que le vase d'expansion est relié au cir­cuit de refroidissement principal et en ce que l'une des parois de la chambre de dégazage comporte un ori­fice relié au vase d'expansion par l'intermédiaire d'un clapet agencé pour s'ouvrir lorsque du gaz est présent dans la chambre; lorsque le clapet s'ouvre, le gaz de la chambre de dégazage s'échappe ainsi vers le vase d'expansion.The present invention relates to an improvement made to this cooling device. According to the invention, the cooling device is characterized in that the expansion tank is connected to the main cooling circuit and in that one of the walls of the degassing chamber has an orifice connected to the expansion tank by through a valve arranged to open when gas is present in the chamber; when the valve opens, the gas from the degassing chamber thus escapes to the expansion tank.

Dans un mode de réalisation avantageux de l'invention, la chambre de dégazage est disposée sous le vase d'expansion et l'orifice permet une communication di­recte entre la partie supérieure de la chambre de dé­gazage et la partie inférieure du vase d'expansion.In an advantageous embodiment of the invention, the degassing chamber is arranged under the expansion vessel and the orifice allows direct communication between the upper part of the degassing chamber and the lower part of the expansion vessel.

On a décrit ci-après, a titre d'exemple non limitatif, divers modes de réalisation du dispositif selon l'in­vention, avec référence aux dessins annexés dans les­quels :

  • La Figure 1 est le schéma de ce dispositif de refroidissement;
  • La Figure 2 est une vue en coupe de la chambre de dégazage suivant II-II de la Figure 1;
  • La Figure 3 montre un autre mode de réalisation du clapet;
  • La Figure 4 montre un troisième mode de realisa­tion du clapet;
  • La Figure 5 montre un quatrième mode de réalisa­tion du clapet;
  • La Figure 6 est une vue schématique illustrant une réalisation dans laquelle la chambre de déga­zage est éloignée du vase d'expansion et reliée a celui-ci par un conduit.
Various embodiments of the device according to the invention have been described below, by way of non-limiting example, with reference to the appended drawings in which:
  • Figure 1 is the diagram of this cooling device;
  • Figure 2 is a sectional view of the degassing chamber along II-II of Figure 1;
  • Figure 3 shows another embodiment of the valve;
  • Figure 4 shows a third embodiment of the valve;
  • Figure 5 shows a fourth embodiment of the valve;
  • Figure 6 is a schematic view illustrating an embodiment in which the degassing chamber is remote from the expansion tank and connected thereto by a conduit.

A la Figure 1, on voit un moteur 1 à combustion interne qui comporte un circuit principal de refroidissement comprenant une pompe 2.In FIG. 1, an internal combustion engine 1 is seen which comprises a main cooling circuit comprising a pump 2.

Le liquide circule à travers le moteur et sort de celui-­ci par plusieurs circuits, à savoir :
- Un circuit principal qui comprend un radiateur 4 relié au moteur 1 par un conduit d'arrivée 5 et un conduit de retour 3. Ce circuit comporte un clapet ou une vanne thermostatique 6 qui est fermé lorsque la température du liquide de refroidissement est in­férieure à une valeur donnée. Le conduit de retour 3 est relié, par l'intermédiaire d'un conduit 7, à la partie inférieure d'un vase d'expansion 8. Ce dernier est fermé à sa partie supérieure par un bouchon taré 9 et il est relié à un dispositif de dégazage 10 du ra­diateur 4.
- Deux circuits secondaires dans lesquels le liquide circule en permanence :

  • a) un circuit utilisé pour le chauffage de l'habita­cle et comprenant un échangeur de chaleur 11 re­lié au moteur par un conduit d'alimentation 13 et un conduit de retour 12;
  • b) un conduit servant au réchauffage des organes an­nexes 16 tels que starter, circuit de ralenti, etc... ainsi qu'au dégazage du moteur. Il est constitué des conduits 15,17,18 et d'une chambre de dégazage 14. Le liquide sortant du moteur passe successi­vement dans le conduit 15, le ou les organes 16, le conduit 17, la chambre 14 et retourne à l'as­piration de la pompe 2 par le conduit 18.
The liquid circulates through the engine and leaves it by several circuits, namely:
- A main circuit which includes a radiator 4 connected to the engine 1 by an inlet duct 5 and a return duct 3. This circuit comprises a valve or a thermostatic valve 6 which is closed when the temperature of the coolant is below a given value. The return conduit 3 is connected, via a conduit 7, to the lower part of an expansion vessel 8. The latter is closed at its upper part by a tared plug 9 and it is connected to a degassing device 10 of the radiator 4.
- Two secondary circuits in which the liquid circulates permanently:
  • a) a circuit used for heating the passenger compartment and comprising a heat exchanger 11 connected to the engine by a supply duct 13 and a return duct 12;
  • b) a duct used for heating the additional members 16 such as the choke, the idling circuit, etc., and also for degassing the engine. It consists of the conduits 15, 17, 18 and a degassing chamber 14. The liquid leaving the engine passes successively through the conduit 15, the member (s) 16, the conduit 17, the chamber 14 and returns to the suction pump 2 through line 18.

Comme on le voit à la Figure 2, la chambre de dégazage 14 a une section circulaire et les conduits 17 et 18 sont de faible section, inférieure a celle des conduits 3 et 5, et débouchent tangentiellement.As seen in Figure 2, the degassing chamber 14 has a circular section and the conduits 17 and 18 are of small section, less than that of the conduits 3 and 5, and open tangentially.

La chambre de dégazage 14 est disposée sous le vase d'expansion 8 et accolée à celui-ci par sa partie supé­rieure, la paroi supérieure de la chambre constituant une partie de la paroi inférieure 19 du vase; elle com­porte un orifice de faible section 20 par lequel elle peut communiquer directement avec le vase d'expansion et qui peut être obturé par un clapet 21. La densité apparente de ce clapet est légèrement inférieure ou égale à la densité du liquide de refroidissement. Il est relié à sa partie supérieure par un bras 22 à des bras de retenue 23 qui limitent sa course vers le bas en venant buter contre la cloison 19.The degassing chamber 14 is disposed under the expansion vessel 8 and adjoined to it by its upper part, the upper wall of the chamber constituting a part of the lower wall 19 of the vessel; it has a small section orifice 20 through which it can communicate directly with the expansion tank and which can be closed by a valve 21. The apparent density of this valve is slightly less than or equal to the density of the coolant. It is connected at its upper part by an arm 22 to retaining arms 23 which limit its downward stroke by abutting against the partition 19.

On ne sortirait cependant pas du cadre de l'invention en utilisant la configuration de la Figure 6 dans la­quelle la chambre 14 est éloignée du vase d'expansion 8. Dans ce cas, les bras 23 du clapet 21 se trouvent dans une chambre 28 communiquant avec la chambre de dégaza­ge 14 par l'orifice 20, la chambre 28 étant en commu­nication avec le vase d'expansion 8 par un conduit 29. Ceci permet de monter le dispositif de l'invention sur un système de refroidissement d'un véhicule déjà exis­ tant.It would not, however, depart from the scope of the invention using the configuration of Figure 6 in which the chamber 14 is remote from the expansion tank 8. In this case, the arms 23 of the valve 21 are located in a communicating chamber 28 with the degassing chamber 14 through the orifice 20, the chamber 28 being in communication with the expansion tank 8 by a conduit 29. This makes it possible to mount the device of the invention on a cooling system of a vehicle already exis so much.

Au démarrage du moteur froid, la vanne 6 est fermée, de sorte qu'il n'y a pas de circulation dans le radia­teur 4. Le seul liquide qui traverse le vase d'expansion 8 est celui qui y parvient par l'orifice 20. Etant donné les faibles dimensions de cet orifice et la faible sec­tion de la conduite 17, la pression P dans le vase d'ex­pansion 8 est pratiquement identique à la pression d'as­piration. Par contre, la pression P′ dans la chambre 14 est intermédiaire entre la pression dans le moteur avant la vanne 6, elle-même proche de la pression de refoulement de la pompe 2, et la pression d'aspiration de cette pompe. La pression P′ dans la chambre 14 est donc supérieure a la pression P dans le vase d'expan­sion. Sous l'effet de la différence de pression (P′ - P) et de la poussée d'Archimède due à sa densité légère­ment inférieure à celle du liquide, le clapet 21 vient s'appliquer sur son siège pratiquement dès la mise en marche du moteur.When the cold engine starts, the valve 6 is closed, so that there is no circulation in the radiator 4. The only liquid which passes through the expansion tank 8 is that which reaches it through the orifice 20 Given the small dimensions of this orifice and the small section of the pipe 17, the pressure P in the expansion tank 8 is practically identical to the suction pressure. On the other hand, the pressure P ′ in the chamber 14 is intermediate between the pressure in the engine before the valve 6, itself close to the discharge pressure of the pump 2, and the suction pressure of this pump. The pressure P ′ in the chamber 14 is therefore greater than the pressure P in the expansion tank. Under the effect of the pressure difference (P ′ - P) and the Archimedes thrust due to its density slightly lower than that of the liquid, the valve 21 comes to apply on its seat practically from the start of the engine.

Lorsque du gaz s'est accumulé dans la chambre 14, il se concentre dans la zone ou se trouve le clapet 21 du fait de la rotation du liquide dans cette chambre. La poussée d'Archimède sur le clapet 21 diminue et il s'ou­vre dès que l'inégalité suivante est vérifiée : p > (P′ - P) s
p étant le poids du flotteur diminué de la poussée d'Ar­chimède et s la section de l'orifice 20.When gas has accumulated in the chamber 14, it concentrates in the zone where the valve 21 is located due to the rotation of the liquid in this chamber. Archimedes' thrust on valve 21 decreases and it opens as soon as the following inequality is verified: p> (P ′ - P) s
p being the weight of the float less the buoyancy and s the section of the orifice 20.

Si cette inégalité n'est pas vérifiée dans une certaine réalisation, on peut augmenter le volume du clapet, donc son poids, diminuer la section s ou la différence P′ - P, cette diminution pouvant être obtenue en modi­fiant les dimensions internes des conduits 15, 17 et 18, en augmentant les pertes de charge en amont de la cham­bre 14, par exemple en prévoyant un diaphragme sur l'un des conduits 15 et 17, ou en diminuant la perte de char­ge P′ - P.If this inequality is not verified in a certain embodiment, it is possible to increase the volume of the valve, therefore its weight, to decrease the section s or the difference P ′ - P, this reduction being able to be obtained by modifying the internal dimensions of the conduits 15 , 17 and 18, by increasing the pressure drops upstream of the chamber 14, for example by providing a diaphragm on one of the conduits 15 and 17, or by reducing the pressure drop P ′ - P.

Aux Figures 1 et 2, le clapet 21 est constitué par un corps sphérique, pouvant être retenu par les bras 23 dont il est solidaire et l'orifice 20 est ménagé dans une partie plane de la cloison 19. Mais dans le mode de réalisation de la Figure 3, l'orifice 20 est ménagé dans une partie sphérique 19a de la cloison 19 et le clapet 21 est retenu par des bras 24 solidaires de la cloison. Une grille de tranquillisation 25 peut éven­tuellement être prévue sous le clapet.In Figures 1 and 2, the valve 21 is constituted by a spherical body, which can be retained by the arms 23 of which it is integral and the orifice 20 is formed in a flat part of the partition 19. But in the embodiment of Figure 3, the orifice 20 is formed in a spherical portion 19 a of the partition 19 and the seal 21 is retained by arms 24 integral with the partition. A tranquilization grid 25 can optionally be provided under the valve.

Dans le mode de réalisation de la Figure 4, le clapet est constitué par une masse cylindrique 26 qui porte à sa partie supérieure un doigt 27 propre à obturer l'orifice 20 qui est ménagé dans une partie tronconi­ que ou sphérique 19b de la cloison 19. La masse 26 est guidée et retenue par les bras 24 solidaires de la cloison 19. La grille de tranquillisation 25 accrochée aux bras 24 est également prévue dans ce mode de réali­sation.In the embodiment of Figure 4, the valve is constituted by a cylindrical mass 26 which carries at its upper part a finger 27 adapted to close the orifice 20 which is formed in a truncated part that or spherical 19 b of the partition 19. The mass 26 is guided and retained by the arms 24 secured to the partition 19. The tranquilization grid 25 attached to the arms 24 is also provided in this embodiment.

La Figure 5 illustre un mode de réalisation voisin de celui de la Figure 4. Comme précédemment, le clapet 30 est mobile dans un espace limité par une partie tronco­nique ou sphérique 19c de la paroi 19, les bras 24 et la grille de tranquillisation 25. Il se compose d'un corps 31 prolongé par une partie supérieure 32 et une partie inférieure 33 de plus faibles dimensions. La partie 32 porte le doigt 27 et elle est guidée par des bras de centrage 34. La partie inférieure 33 est en forme de croix et elle passe à travers un orifice 35 de la grille 25. La face inférieure du corps 31 présen­te une partie 36 en forme de tronc de cône pour éviter un collage accidentel sur la grille 25.Figure 5 illustrates an embodiment similar to that of Figure 4. As before, the valve 30 is movable in a space limited by a frustoconical or spherical part 19 c of the wall 19, the arms 24 and the tranquilization grid 25 It consists of a body 31 extended by an upper part 32 and a lower part 33 of smaller dimensions. The part 32 carries the finger 27 and it is guided by centering arms 34. The lower part 33 is in the shape of a cross and it passes through an orifice 35 of the grid 25. The lower face of the body 31 has a part 36 in the shape of a truncated cone to avoid accidental sticking to the grid 25.

Claims (12)

1. Dispositif de refroidissement par liquide d'un mo­teur à combustion interne qui comporte un circuit prin­cipal de refroidissement comprenant un radiateur(4) re­lié au moteur (1) par un conduit d'arrivée (5) du li­quide et un conduit de retour (3), des moyens (2) pour faire circuler le liquide entre le moteur (1) et le ra­diateur (4) , et une vanne thermostatique (6) propre à interrompre la circulation du liquide lorsque la tempé­rature de celui-ci est inférieure à une valeur donnée, au moins un circuit secondaire de refroidissement monté en parallèle avec le circuit principal et comprenant une chambre de dégazage (14) de faible volume reliée au moteur (1) par un conduit d'arrivée (17) de liquide et un conduit de départ (18), et des moyens (2) pour faire circuler le liquide entre le moteur (1) et la chambre de dégazage (14), et un vase d'expansion (8) relié à l'un des circuits de refroidissement,
caractérisé en ce que le vase d'expansion (8) est relié au circuit de refroidissement principal et en ce que l'une (19) des parois de la chambre de dégazage (14) comporte un orifice (20) relié au vase d'expansion (8) par l'intermédiaire d'un clapet (21 ou 26) agencé pour s'ouvrir lorsque du gaz est présent dans la chambre (14).1. Liquid cooling device of an internal combustion engine which comprises a main cooling circuit comprising a radiator (4) connected to the engine (1) by an inlet pipe (5) for the liquid and a return pipe ( 3), means (2) for circulating the liquid between the engine (1) and the radiator (4), and a thermostatic valve (6) capable of interrupting the circulation of the liquid when the temperature thereof is below a given value, at least one secondary cooling circuit mounted in parallel with the main circuit and comprising a degassing chamber (14) of small volume connected to the engine (1) by an inlet pipe (17) of liquid and a pipe flow (18), and means (2) for circulating the liquid between the engine (1) and the degassing chamber (14), and an expansion tank (8) connected to one of the cooling circuits ,
characterized in that the expansion tank (8) is connected to the main cooling circuit and in that one (19) of the walls of the degassing chamber (14) has an orifice (20) connected to the expansion (8) by means of a valve (21 or 26) arranged to open when gas is present in the chamber (14). 2. Dispositif de refroidissement selon la revendica­tion 1,
caractérisé en ce que la chambre de dégazage (14) est disposée sous le vase d'expansion (8) et en ce que l'orifice (20) permet une communication directe entre la partie supérieure de la chambre de dégazage (14) et la partie inférieure du vase d'expansion (8).2. Cooling device according to claim 1,
characterized in that the degassing chamber (14) is arranged under the expansion tank (8) and in that the orifice (20) allows direct communication between the upper part of the degassing chamber (14) and the lower part of the expansion tank (8). 3. Dispositif de refroidissement selon la revendica­tion 1,
caractérisé en ce que la chambre de dégazage (14) est éloignée du vase d'expansion (8), ledit orifice (20) étant relié à celui-ci par un conduit (29).3. Cooling device according to claim 1,
characterized in that the degassing chamber (14) is remote from the expansion tank (8), said orifice (20) being connected to the latter by a conduit (29). 4. Dispositif de refroidissement selon l'une des reven­dications 1 à 3,
caractérisé en ce que la chambre de dégazage (14) est de section circulaire et en ce que les conduits d'en­trée (17) et de sortie (18) y débouchent tangentielle­ment.4. Cooling device according to one of claims 1 to 3,
characterized in that the degassing chamber (14) is of circular section and in that the inlet (17) and outlet (18) conduits open there tangentially. 5. Dispositif de refroidissement selon l'une quelconque des revendications 1 à 4,
caractérisé en ce que le clapet (21,26 ou 30) a une densité au plus égale à celle du liquide de refroidis­sement.5. Cooling device according to any one of claims 1 to 4,
characterized in that the valve (21, 26 or 30) has a density at most equal to that of the coolant. 6. Dispositif de refroidissement selon l'une quelconque des revendications précédentes,
caractérisé en ce que les conduits (17 et 18) reliant la chambre de dégazage (14) au moteur (1) ont une sec­tion inférieure à celle des conduits (3 et 5) reliant le radiateur (4) à ce moteur (1).6. Cooling device according to any one of the preceding claims,
characterized in that the conduits (17 and 18) connecting the degassing chamber (14) to the engine (1) have a smaller cross-section than that of the conduits (3 and 5) connecting the radiator (4) to this engine (1). 7. Dispositif de refroidissement selon l'une quelcon­que des revendications précédentes,
caractérisé en ce que le clapet (21) comporte à sa partie supérieure des bras de retenue (23) qui limi­tent sa course vers le bas en venant buter contre la cloison (19) de la chambre (14).7. Cooling device according to any one of the preceding claims,
characterized in that the valve (21) has at its upper part retaining arms (23) which limit its downward stroke by abutting against the partition (19) of the chamber (14). 8. Dispositif de refroidissement selon l'une quelconque des revendications 1 à 6,
caractérisé par des bras de retenue (24) solidaires de la paroi (19) et limitant la course du clapet (21) vers le bas.8. Cooling device according to any one of claims 1 to 6,
characterized by retaining arms (24) integral with the wall (19) and limiting the travel of the valve (21) downwards. 9. Dispositif de refroidissement selon l'une quelconque des revendications précédentes,
caractérisé en ce que le clapet (21) est sphérique.9. Cooling device according to any one of the preceding claims,
characterized in that the valve (21) is spherical. 10. Dispositif de refroidissement selon l'une des re­vendications précédentes,
caractérisé en ce que l'orifice (20) est ménagé dans une partie plane de la paroi (19).10. Cooling device according to one of the preceding claims,
characterized in that the orifice (20) is formed in a flat part of the wall (19). 11. Dispositif de refroidissement selon l'une quelcon­que des revendications 1 à 9,
caractérisé en ce que l'orifice (20) est ménagé dans une partie sphérique (19a) de la paroi (19).11. Cooling device according to any one of claims 1 to 9,
characterized in that the orifice (20) is formed in a spherical part (19 a ) of the wall (19). 12. Dispositif de refroidissement selon l'une quelcon­que des revendications 1 à 8,
caractérisé en ce que le clapet (26) est constitué par une masse cylindrique qui porte à sa partie supérieure un doigt propre à obturer l'orifice (20) ménagé dans une partie tronconique (19b) de la cloison (19).12. Cooling device according to any one of claims 1 to 8,
characterized in that the valve (26) is constituted by a cylindrical mass which carries at its upper part a finger suitable for closing the orifice (20) formed in a frustoconical part (19 b ) of the partition (19).
EP89403455A 1988-12-14 1989-12-13 Cooling device for an internal-combustion engine Expired - Lifetime EP0374038B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8816872 1988-12-14
FR8816872A FR2640315B1 (en) 1988-12-14 1988-12-14 INTERNAL COMBUSTION COOLING DEVICE

Publications (2)

Publication Number Publication Date
EP0374038A1 true EP0374038A1 (en) 1990-06-20
EP0374038B1 EP0374038B1 (en) 1993-10-13

Family

ID=9373208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89403455A Expired - Lifetime EP0374038B1 (en) 1988-12-14 1989-12-13 Cooling device for an internal-combustion engine

Country Status (5)

Country Link
EP (1) EP0374038B1 (en)
JP (1) JP2706542B2 (en)
DE (1) DE68909897T2 (en)
ES (1) ES2046515T3 (en)
FR (1) FR2640315B1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106297A1 (en) * 1991-02-28 1992-09-03 Behr Gmbh & Co Cross flow cooling device for IC engine - has second connection tube between radiator tank and expansion tank
FR2690950A1 (en) * 1992-05-08 1993-11-12 Behr Gmbh & Co Degassing device for a cooling plant of an internal combustion engine.
EP1905975A1 (en) * 2006-09-14 2008-04-02 Honda Motor Co., Ltd Water-cooled internal combustion engine having radiator
EP2034155A1 (en) * 2007-09-07 2009-03-11 Honda Motor Co., Ltd Coolant passage structure for engine
WO2009113019A3 (en) * 2008-03-10 2009-11-26 Land Rover A cooling system expansion tank
FR2938298A1 (en) * 2008-11-13 2010-05-14 Peugeot Citroen Automobiles Sa ENGINE COOLING CIRCUIT
EP2375027A3 (en) * 2010-02-02 2013-01-09 Vaillant GmbH Compensation container for coolant circuits
EP2386740A3 (en) * 2010-04-24 2013-01-09 Audi AG Valve assembly for aerating a coolant circuit of a combustion engine
EP2615273A1 (en) * 2012-01-11 2013-07-17 Volvo Car Corporation Cooling system for an engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2455743B (en) * 2007-12-20 2012-10-10 Ford Global Tech Llc Cooling system expansion tank
SE544074C2 (en) * 2020-04-29 2021-12-07 Scania Cv Ab Thermal Management System, and Vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269416B (en) * 1964-01-16 1968-05-30 Julius Fr Behr Cooling circuit of internal combustion engines for rail vehicles
FR2317489A1 (en) * 1975-07-11 1977-02-04 Citroen Sa Degasification of water of car engine cooling system - using swirl chamber with tangential inlet and outlet in secondary circuit to extract gas bubbles
DE2821872A1 (en) * 1978-05-19 1979-11-22 Audi Nsu Auto Union Ag Pressurised cooling system for liq. cooled IC engines - has reservoir mounted above system with make=up pipe through base, sealed by float valve
US4358051A (en) * 1981-02-09 1982-11-09 Ford Motor Company Thermostat assembly for an engine cooling system
WO1988009429A1 (en) * 1987-05-18 1988-12-01 Bayerische Motoren Werke Aktiengesellschaft Liquid cooling circuit for driving and working engines, in particular for internal combustion engines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621837A1 (en) * 1986-06-28 1988-01-07 Man Nutzfahrzeuge Gmbh BUBBLE SEPARATOR FOR WATER-COOLED ENGINES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269416B (en) * 1964-01-16 1968-05-30 Julius Fr Behr Cooling circuit of internal combustion engines for rail vehicles
FR2317489A1 (en) * 1975-07-11 1977-02-04 Citroen Sa Degasification of water of car engine cooling system - using swirl chamber with tangential inlet and outlet in secondary circuit to extract gas bubbles
DE2821872A1 (en) * 1978-05-19 1979-11-22 Audi Nsu Auto Union Ag Pressurised cooling system for liq. cooled IC engines - has reservoir mounted above system with make=up pipe through base, sealed by float valve
US4358051A (en) * 1981-02-09 1982-11-09 Ford Motor Company Thermostat assembly for an engine cooling system
WO1988009429A1 (en) * 1987-05-18 1988-12-01 Bayerische Motoren Werke Aktiengesellschaft Liquid cooling circuit for driving and working engines, in particular for internal combustion engines

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4106297A1 (en) * 1991-02-28 1992-09-03 Behr Gmbh & Co Cross flow cooling device for IC engine - has second connection tube between radiator tank and expansion tank
FR2690950A1 (en) * 1992-05-08 1993-11-12 Behr Gmbh & Co Degassing device for a cooling plant of an internal combustion engine.
ES2066718A2 (en) * 1992-05-08 1995-03-01 Behr Gmbh & Co Degassing device for cooling unit of vehicle IC engine - involves housing welded or otherwise secured to floor of compensation tank and provided with floater valve
DE4215189C2 (en) * 1992-05-08 1996-02-22 Behr Gmbh & Co Degassing device for a cooling system of a motor vehicle internal combustion engine
CN101220765B (en) * 2006-09-14 2011-05-04 本田技研工业株式会社 Water cooling type internal combustion engine having radiator
EP1905975A1 (en) * 2006-09-14 2008-04-02 Honda Motor Co., Ltd Water-cooled internal combustion engine having radiator
US7673594B2 (en) 2006-09-14 2010-03-09 Honda Motor Co., Ltd. Water-cooled internal combustion engine having radiator
EP2034155A1 (en) * 2007-09-07 2009-03-11 Honda Motor Co., Ltd Coolant passage structure for engine
WO2009113019A3 (en) * 2008-03-10 2009-11-26 Land Rover A cooling system expansion tank
EP2187015A1 (en) * 2008-11-13 2010-05-19 Peugeot Citroen Automobiles SA Engine cooling circuit
FR2938298A1 (en) * 2008-11-13 2010-05-14 Peugeot Citroen Automobiles Sa ENGINE COOLING CIRCUIT
EP2375027A3 (en) * 2010-02-02 2013-01-09 Vaillant GmbH Compensation container for coolant circuits
EP2386740A3 (en) * 2010-04-24 2013-01-09 Audi AG Valve assembly for aerating a coolant circuit of a combustion engine
US8485143B2 (en) 2010-04-24 2013-07-16 Audi Ag Valve arrangement for venting a coolant circuit of an internal combustion engine
EP2615273A1 (en) * 2012-01-11 2013-07-17 Volvo Car Corporation Cooling system for an engine

Also Published As

Publication number Publication date
JPH02245417A (en) 1990-10-01
DE68909897T2 (en) 1994-04-14
ES2046515T3 (en) 1994-02-01
JP2706542B2 (en) 1998-01-28
EP0374038B1 (en) 1993-10-13
FR2640315B1 (en) 1991-02-08
FR2640315A1 (en) 1990-06-15
DE68909897D1 (en) 1993-11-18

Similar Documents

Publication Publication Date Title
EP0374038B1 (en) Cooling device for an internal-combustion engine
WO2004042310A1 (en) Multiple-fluid heat exchanger, in particular for a motor vehicle, and related thermal energy management system
EP1375857A1 (en) Cooling device for an internal combustion engine
FR2684721A1 (en) METHOD AND APPARATUS FOR COOLING A HEAVY - VARIABLE CHARGE THERMAL MOTOR.
EP3555457B1 (en) Duct for the passage of liquid coolant for an internal combustion engine of a motor vehicle
FR2482906A1 (en) IMPROVEMENTS IN COOLING SYSTEMS OF MOTORS OF RADIATOR VEHICLES ASSOCIATED WITH AN EXPANSION TANK
EP0334753B1 (en) Fuel feeding device with a cooled float chamber
EP0986706B1 (en) System for vaporising liquefied petrol gas heated by engine lubricating oil
EP0340370B1 (en) Wall-mounted heater for heating and hot water production
EP1070842B1 (en) Suction apparatus for an internal combustion engine
EP0850791B1 (en) Heating system for the passenger compartment of a diesel combustion engine motor vehicle
FR2777606A1 (en) DEVICE FOR CONTROLLING THE OUTPUT POWER OF A COMBUSTION HEATER FOR INTERNAL COMBUSTION ENGINE
FR2780102A1 (en) Liquefied natural gas heating method for motor vehicle engine
FR2589200A1 (en) IC engine fuel supply circuit
FR2838477A1 (en) I.C. engine cooling circuit comprises radiator and additional exchanger connected to radiator outlet conduit which comprises nozzle, between inlet and outlet connections from exchanger, with sealing element
EP0371841B1 (en) Cooling circuit for an internal-combustion engine of a motor vehicle
EP1451463B1 (en) Regulator thermostat support of heat engine with external hot water circuit
JPS633383Y2 (en)
FR2752016A1 (en) Cooling system for internal combustion engine
EP3236041B1 (en) Cooling system of an internal combustion engine
EP1173669A1 (en) Liquefied gas evaporating device for marine engines
EP4124727A1 (en) Oil sump
FR2691504A1 (en) Cooling device for a heat engine comprising a condenser.
WO2002050416A1 (en) Device for expanding liquefied gas with separate vaporising element
FR2577033A1 (en) Device for reheating a petroleum liquid, such as gas oil or fuel oil

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT

17P Request for examination filed

Effective date: 19900425

17Q First examination report despatched

Effective date: 19910710

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

REF Corresponds to:

Ref document number: 68909897

Country of ref document: DE

Date of ref document: 19931118

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

Effective date: 19931201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2046515

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
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20070112

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

Ref country code: ES

Payment date: 20071207

Year of fee payment: 19

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

Ref country code: IT

Payment date: 20071212

Year of fee payment: 19

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

Ref country code: GB

Payment date: 20071129

Year of fee payment: 19

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

Ref country code: DE

Payment date: 20071129

Year of fee payment: 19

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

Effective date: 20081213

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

Ref country code: DE

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

Effective date: 20090701

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: 20081213

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20081215

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: 20081215

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 NON-PAYMENT OF DUE FEES

Effective date: 20081213