WO2007023212A1 - Device for producing a cooling airflow for an engine - Google Patents

Device for producing a cooling airflow for an engine Download PDF

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Publication number
WO2007023212A1
WO2007023212A1 PCT/FR2005/050679 FR2005050679W WO2007023212A1 WO 2007023212 A1 WO2007023212 A1 WO 2007023212A1 FR 2005050679 W FR2005050679 W FR 2005050679W WO 2007023212 A1 WO2007023212 A1 WO 2007023212A1
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WO
WIPO (PCT)
Prior art keywords
cooling
heat exchanger
air flow
flow
engine
Prior art date
Application number
PCT/FR2005/050679
Other languages
French (fr)
Inventor
Patrice Camu
Original Assignee
Patrice Camu
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 Patrice Camu filed Critical Patrice Camu
Priority to PCT/FR2005/050679 priority Critical patent/WO2007023212A1/en
Publication of WO2007023212A1 publication Critical patent/WO2007023212A1/en

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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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/08—Use of engine exhaust gases for pumping cooling-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
    • 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
    • F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
    • F01P9/06—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00 by use of refrigerating apparatus, e.g. of compressor or absorber type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2270/00—Mixing air with exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a device for producing a cooling air flow for a heat engine comprising at least one exhaust gas duct and at least one heat exchanger.
  • the present invention is in the field of cooling of vehicle engines, in particular engines of thermal type.
  • a heat engine generally comprises an exhaust outlet of the gases from the combustion and a circuit for cooling the engine during its use. This cooling is generally carried out by circulating a flow of air through a heat exchanger, the air being sucked directly from the outside.
  • the invention aims to overcome the drawbacks of the state of the art by proposing a device that can be used alone or with an existing cooling system, and using the speed and temperature of the exhaust gas to increase the speed of air circulation.
  • the invention relates to a device for producing a cooling air flow for a heat engine comprising at least one gas exhaust duct and at least one heat exchanger, characterized in that said device comprises, on the one hand, means capable of generating a flow of cooling air by suction by the venturi effect by the exhaust gas and, on the other hand, means for channeling said flow of cooling air through said exchanger thermal.
  • said means for generating the air flow are located at the level of the channeling means downstream of the heat exchanger.
  • said means for generating the air flow comprise a venturi into which said channeling means opens.
  • said venturi is in the form of a narrowing of the diameter of the gas exhaust pipe.
  • said exhaust pipe comprises means for injecting exhaust gases into the pipe means according to a component oriented in the direction of flow of the air flow in said channeling means.
  • said channeling means comprise a narrowing of their diameter.
  • the device according to the invention comprises means for cooling a fluid by compressing and then relaxing said exhaust gas or the air flow generated.
  • the device according to claim 7 characterized in that said cooling fluid is channeled to cool said heat exchanger.
  • said cooling fluid is channeled to cool said air flow generated through an additional heat exchanger.
  • FIG. 1 shows schematically an embodiment of the device according to the invention
  • FIG. 3 is a representation of a particular embodiment of the invention.
  • the present invention relates to a device 1 of production a cooling air flow for a thermal type motor.
  • the device according to the invention will find its application in any type of vehicle, especially construction vehicles, sports car vehicle or the like.
  • Such a motor comprises at least one pipe 2 for exhausting the gases resulting from the internal combustion of said engine. Cooling of the latter is carried out through a cooling circuit, not shown, comprising at least one heat exchanger 3 through which air can flow from the outside.
  • the device 1 comprises means 4 capable of generating a flow of cooling air by suction by venturi effect by the exhaust gas. Therefore, the invention is to use the gas velocity and exhaust temperature to create a vacuum generating an airflow by suction.
  • Means 5 channel said flow of cooling air through said heat exchanger 3.
  • these channeling means may extend downstream of the heat exchanger 3. However, it may be provided to create the flow of air upstream of said heat exchanger 3. In all cases, it is traversed by said air flow generated by the suction created by the exhaust gas.
  • said airflow may already be preexisting, in particular generated through a conventional ventilation system equipping said engine. It will therefore be accelerated by the device 1 according to the invention.
  • said generation means 4 of the air flow comprises a venturi 6 into which said channeling means 5.
  • This venturi 6 consists of a narrowing of the diameter of the pipe 2 exhaust gas. This venturi 6 increases the flow velocity of the exhaust gas to increase the suction at the channeling means 5.
  • said exhaust pipe 2 comprises means 7 for injecting the exhaust gases into the channeling means 5 according to a component oriented in the flow direction of the flow of air in said channeling means 5.
  • injection means 7 can only be constituted by the end of the pipe 2 oriented specifically, in the direction and direction of the air flow that will be generated by suction.
  • the end of the pipe 2 is oriented downstream so as to create an upstream air flow where the heat exchanger 3 is located.
  • the channeling means 5 may comprise a narrowing 8 of their diameter.
  • This narrowing 8 may advantageously be located, according to the embodiments, upstream of the injection of the exhaust gases into the channeling means 5 or upstream of the place where the channeling means 5 open into the pipe of the pipe. exhaust 2.
  • the device 1 comprises means 9 for cooling a fluid by compressing and then relaxing said exhaust gas or the air flow generated. This compression then relaxation allows a loss of heat which cools the fluid passing through these cooling means 9.
  • These constitute a circuit 10 inside which circulates said fluid, loop or open way.
  • said cooling fluid is channeled to cool said heat exchanger 3, in particular by passing through it.
  • said cooling fluid is channeled to cool said generated air flow through an additional heat exchanger 11.
  • the latter is disposed upstream of the heat exchanger 3 so as to cool the air flow before it passes through.
  • an additive may be added in the pipe 2, in the exhaust gas, by injection, vaporization or the like, so as to generate an overpressure inside said pipe 2.
  • This excess pressure may result in a increasing the speed of the exhaust gas and a relaxation at the outlet of said pipe 2.
  • the additive may be chosen liquid, such as water, which will be vaporized under the effect of temperature of the exhaust gas, thus decreasing the temperature of the latter and increasing the pressure inside the pipe 2.
  • the device 1 according to the invention makes it possible to cool the engine of a vehicle, even when the latter is at a standstill and operates economically, without using additional energy, through the recycling of the exhaust gases. In addition, it offers the advantage of not failing since it depends on the exhaust gas and therefore directly from the operation of the engine. Finally, the higher the speed of the engine increases, the higher the suction and the generated flow increases in function, further cooling the engine thus solicited.
  • the device 1 still has the advantage of being compatible with a ventilation cooling system already existing at the engine.
  • the invention is not limited to the examples illustrated and described above which may have variants and modifications without departing from the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention relates to a device (1) for producing a cooling airflow for a heat engine comprising at least one gas exhaust pipe (2) and at least one heat exchanger (3). The invention is characterised in that the device comprises: means (4) for generating a cooling airflow, by means of Venturi suction with the exhaust gases; and means (5) for channelling said cooling airflow through the heat exchanger (3).

Description

DISPOSITIF DE PRODUCTION D'UN FLUX D'AIR DE REFROIDISSEMENT POUR MOTEUR.DEVICE FOR PRODUCING A COOLING AIR FLOW FOR MOTOR.
La présente invention concerne un dispositif de production d'un flux d' air de refroidissement pour moteur thermique comprenant au moins une conduite d'échappement des gaz et au moins un échangeur thermique.The present invention relates to a device for producing a cooling air flow for a heat engine comprising at least one exhaust gas duct and at least one heat exchanger.
La présente invention entre dans le domaine du refroidissement des moteurs de véhicule, en particulier des moteurs de type thermique .The present invention is in the field of cooling of vehicle engines, in particular engines of thermal type.
Un moteur thermique comprend généralement une sortie d'échappement des gaz issus de la combustion ainsi qu'un circuit pour refroidir le moteur au cours de son utilisation. Ce refroidissement est généralement effectué par circulation d'un flux d'air au travers d'un échangeur thermique, l'air étant aspiré directement depuis l'extérieur.A heat engine generally comprises an exhaust outlet of the gases from the combustion and a circuit for cooling the engine during its use. This cooling is generally carried out by circulating a flow of air through a heat exchanger, the air being sucked directly from the outside.
En temps normal le déplacement du véhicule fournit un flux d'air suffisant pour permettre le refroidissement du moteur. A l'arrêt, une soufflerie augmente la circulation d'air.Normally moving the vehicle provides sufficient airflow to allow engine cooling. When stopped, a blower increases the air circulation.
Toutefois, en cas de températures extérieures élevées, si le déplacement suffit pour refroidir le moteur, le fonctionnement à l'arrêt peut poser problème. En particulier dans le cas de véhicules de chantiers qui ne se déplacent que peu et évoluent le plus souvent en plein soleil. Par conséquent, la température de l'air ambiant est trop élevée pour refroidir correctement le moteur qu'il est alors nécessaire d'arrêter pour ne pas qu'il subisse de dommage. De manière identique, dans les sports automobiles , par exemple en formule un ou autre , les moteurs chauffent davantage, notamment en raison de la chaleur qui règle sur les circuits, par conséquent leur refroidissement par air n'est pas toujours suffisant pour développer la pleine capacité de ces engins . Les solutions utilisées pour pallier cet inconvénient consistent à agrandir la surface d'échange thermique au travers de radiateurs toujours plus grands, ou d'augmenter la vitesse de circulation de l'air ou la quantité d'air circulant, notamment au travers de ventilateurs réciproquement tournant plus vite ou de taille plus importante.However, in case of high outside temperatures, if the displacement is sufficient to cool the engine, stopping may be a problem. Especially in the case of construction site vehicles that move only a little and usually move in direct sunlight. As a result, the ambient air temperature is too high to properly cool the engine, which must be stopped in order to prevent damage to the engine. Similarly, in motor sports, for example in formula one or another, engines heat more, especially because of the heat that regulates the circuits, therefore their cooling by air is not always sufficient to develop the full capacity of these machines. The solutions used to overcome this drawback consist in enlarging the heat exchange surface through radiators that are always larger, or increasing the speed of air circulation or the amount of air circulating, in particular through fans reciprocally. turning faster or larger.
L'invention a pour but de pallier les inconvénients de l'état de la technique en proposant un dispositif pouvant être utilisé seul ou avec un système de refroidissement existant, et utilisant la vitesse et la température des gaz d' échappement pour augmenter la vitesse de circulation de l'air.The invention aims to overcome the drawbacks of the state of the art by proposing a device that can be used alone or with an existing cooling system, and using the speed and temperature of the exhaust gas to increase the speed of air circulation.
Pour ce faire, l'invention concerne un dispositif de production d'un flux d'air de refroidissement pour moteur thermique comprenant au moins une conduite d'échappement des gaz et au moins un échangeur thermique, caractérisé par le fait que ledit dispositif comporte, d'une part, des moyens aptes à générer un flux d'air de refroidissement par aspiration par effet venturi par les gaz d'échappement et, d'autre part, des moyens de canalisation dudit flux d' air de refroidissement au travers dudit échangeur thermique.To this end, the invention relates to a device for producing a cooling air flow for a heat engine comprising at least one gas exhaust duct and at least one heat exchanger, characterized in that said device comprises, on the one hand, means capable of generating a flow of cooling air by suction by the venturi effect by the exhaust gas and, on the other hand, means for channeling said flow of cooling air through said exchanger thermal.
Selon d'autres caractéristiques de l'invention, lesdits moyens de génération du flux d' air sont situés au niveau des moyens de canalisation en aval de l' échangeur thermique.According to other characteristics of the invention, said means for generating the air flow are located at the level of the channeling means downstream of the heat exchanger.
Selon un mode de réalisation, lesdits moyens de génération du flux d' air comprennent un venturi dans lequel débouche lesdits moyens de canalisation.According to one embodiment, said means for generating the air flow comprise a venturi into which said channeling means opens.
Avantageusement, ledit venturi se présente sous la forme d'un rétrécissement du diamètre de la conduite d'échappement des gaz . Selon un autre mode de réalisation, ladite conduite d'échappement comprend des moyens d'injection des gaz d'échappement dans les moyens de canalisation suivant une composante orientée dans le sens de circulation du flux d'air dans lesdits moyens de canalisation.Advantageously, said venturi is in the form of a narrowing of the diameter of the gas exhaust pipe. According to another embodiment, said exhaust pipe comprises means for injecting exhaust gases into the pipe means according to a component oriented in the direction of flow of the air flow in said channeling means.
De préférence, lesdits moyens de canalisation comprennent un rétrécissement de leur diamètre.Preferably, said channeling means comprise a narrowing of their diameter.
Avantageusement, le dispositif selon l'invention comprend des moyens de refroidissement d'un fluide par compression puis détente desdits gaz d' échappement ou du flux d' air généré .Advantageously, the device according to the invention comprises means for cooling a fluid by compressing and then relaxing said exhaust gas or the air flow generated.
De plus, le dispositif selon la revendication 7, caractérisé par le fait que ledit fluide de refroidissement est canalisé pour refroidir ledit échangeur thermique .In addition, the device according to claim 7, characterized in that said cooling fluid is channeled to cool said heat exchanger.
Selon des modes particuliers de réalisation, ledit fluide de refroidissement est canalisé pour refroidir ledit flux d'air généré au travers d'un échangeur thermique supplémentaire.According to particular embodiments, said cooling fluid is channeled to cool said air flow generated through an additional heat exchanger.
D ' autres caractéristiques et avantages de l ' invention ressortiront de la description détaillée qui va suivre des modes de réalisation non limitatifs de l'invention, en référence aux figures annexées dans lesquelles :Other characteristics and advantages of the invention will emerge from the following detailed description of the nonlimiting embodiments of the invention, with reference to the appended figures in which:
- la figure 1 représente schématiquement un mode de réalisation du dispositif selon l'invention ;- Figure 1 shows schematically an embodiment of the device according to the invention;
- la figure 2 représente un autre mode de réalisation du dispositif ;- Figure 2 shows another embodiment of the device;
- la figure 3 est une représentation d'un mode particulier de réalisation de l'invention.- Figure 3 is a representation of a particular embodiment of the invention.
La présente invention concerne un dispositif 1 de production d'un flux d'air de refroidissement pour moteur de type thermique .The present invention relates to a device 1 of production a cooling air flow for a thermal type motor.
Le dispositif selon l'invention trouvera son application dans tout type de véhicule, en particulier les véhicules de chantier, de véhicule de sport automobile ou analogue.The device according to the invention will find its application in any type of vehicle, especially construction vehicles, sports car vehicle or the like.
Un tel moteur comprend au moins une conduite 2 d' échappement des gaz issus de la combustion interne dudit moteur. Le refroidissement de ce dernier s'effectue au travers d'un circuit de refroidissement, non représenté, comprenant au moins un échangeur thermique 3 au travers duquel peut circuler de 1' air provenant de l' extérieur .Such a motor comprises at least one pipe 2 for exhausting the gases resulting from the internal combustion of said engine. Cooling of the latter is carried out through a cooling circuit, not shown, comprising at least one heat exchanger 3 through which air can flow from the outside.
De manière avantageuse, le dispositif 1 selon l'invention comprend des moyens 4 aptes à générer un flux d' air de refroidissement par aspiration par effet venturi par les gaz d'échappement. Par conséquent, l'invention consiste à utiliser la vitesse et la température d'échappement des gaz pour créer une dépression générant un flux d' air par aspiration .Advantageously, the device 1 according to the invention comprises means 4 capable of generating a flow of cooling air by suction by venturi effect by the exhaust gas. Therefore, the invention is to use the gas velocity and exhaust temperature to create a vacuum generating an airflow by suction.
Des moyens 5 canalisent ledit flux d'air de refroidissement au travers dudit échangeur thermique 3. Selon les modes préférentiels de réalisation, visible sur les figures, ces moyens de canalisation peuvent s'étendre en aval de l' échangeur thermique 3. Toutefois , il peut être prévu de créer le flux d' air en amont dudit échangeur thermique 3. Dans tous les cas , ce dernier est traversé par ledit flux d' air généré par l'aspiration créée par les gaz d'échappement.Means 5 channel said flow of cooling air through said heat exchanger 3. According to the preferred embodiments, visible in the figures, these channeling means may extend downstream of the heat exchanger 3. However, it may be provided to create the flow of air upstream of said heat exchanger 3. In all cases, it is traversed by said air flow generated by the suction created by the exhaust gas.
A ce propos, on notera que ledit flux d'air peut déjà être préexistant, notamment généré au travers d'un système de ventilation classique équipant ledit moteur. Il sera donc accéléré par le dispositif 1 selon l'invention.In this respect, it will be noted that said airflow may already be preexisting, in particular generated through a conventional ventilation system equipping said engine. It will therefore be accelerated by the device 1 according to the invention.
De manière tout particulière, comme visible sur le mode de réalisation de la figure 1, lesdits moyens de génération 4 du flux d' air comprennent un venturi 6 dans lequel débouche lesdits moyens de canalisation 5. Ce venturi 6 consiste en un rétrécissement du diamètre de la conduite 2 d'échappement des gaz . Ce venturi 6 augmente la vitesse de circulation des gaz d'échappement pour augmenter l'aspiration au niveau des moyens de canalisation 5.In particular, as visible in the mode of embodiment of Figure 1, said generation means 4 of the air flow comprises a venturi 6 into which said channeling means 5. This venturi 6 consists of a narrowing of the diameter of the pipe 2 exhaust gas. This venturi 6 increases the flow velocity of the exhaust gas to increase the suction at the channeling means 5.
Selon un autre mode de réalisation, visible sur la figure 2, ladite conduite d'échappement 2 comprend des moyens 7 d'injection des gaz d'échappement dans les moyens de canalisation 5 suivant une composante orientée dans le sens de circulation du flux d' air dans lesdits moyens de canalisation 5. Ces moyens d'injection 7 peuvent uniquement être constitués par l'extrémité de la conduite 2 orientée de manière spécifique, selon la direction et le sens du flux d'air qui sera générer par aspiration. En particulier, l'extrémité de la conduite 2 est orientée vers l'aval de manière à créer un flux d'air en amont où se situe l'échangeur thermique 3.According to another embodiment, visible in FIG. 2, said exhaust pipe 2 comprises means 7 for injecting the exhaust gases into the channeling means 5 according to a component oriented in the flow direction of the flow of air in said channeling means 5. These injection means 7 can only be constituted by the end of the pipe 2 oriented specifically, in the direction and direction of the air flow that will be generated by suction. In particular, the end of the pipe 2 is oriented downstream so as to create an upstream air flow where the heat exchanger 3 is located.
Pour améliorer la circulation d'air, les moyens de canalisation 5 peuvent comprendre un rétrécissement 8 de leur diamètre. Ce rétrécissement 8 peut être avantageusement situé, selon les modes de réalisation, en amont de l'injection des gaz d'échappement dans les moyens de canalisation 5 ou en amont de l'endroit où débouchent les moyens de canalisation 5 dans la conduite d' échappement 2.To improve the flow of air, the channeling means 5 may comprise a narrowing 8 of their diameter. This narrowing 8 may advantageously be located, according to the embodiments, upstream of the injection of the exhaust gases into the channeling means 5 or upstream of the place where the channeling means 5 open into the pipe of the pipe. exhaust 2.
Selon un autre mode de réalisation, visible sur la figure 3, le dispositif 1 selon l'invention comprend des moyens de refroidissement 9 d'un fluide par compression puis détente desdits gaz d' échappement ou du flux d' air généré . Cette compression puis détente permet une perte de chaleur qui refroidit le fluide qui traverse ces moyens de refroidissement 9. Ces derniers constituent un circuit 10 à l'intérieur duquel circule ledit fluide, en boucle ou de manière ouverte.According to another embodiment, visible in FIG. 3, the device 1 according to the invention comprises means 9 for cooling a fluid by compressing and then relaxing said exhaust gas or the air flow generated. This compression then relaxation allows a loss of heat which cools the fluid passing through these cooling means 9. These constitute a circuit 10 inside which circulates said fluid, loop or open way.
Selon les cas de figure, ledit fluide de refroidissement est canalisé pour refroidir ledit échangeur thermique 3, notamment en le traversant. De préférence, ledit fluide de refroidissement est canalisé pour refroidir ledit flux d'air généré au travers d'un échangeur thermique 11 supplémentaire. Ce dernier est disposé en amont de l' échangeur thermique 3 de manière à refroidir le flux d'air avant qu'il le traverse.Depending on the case, said cooling fluid is channeled to cool said heat exchanger 3, in particular by passing through it. Preferably, said cooling fluid is channeled to cool said generated air flow through an additional heat exchanger 11. The latter is disposed upstream of the heat exchanger 3 so as to cool the air flow before it passes through.
De plus, un additif peut être ajouté dans la conduite 2, au sein des gaz d'échappement, par injection, vaporisation ou analogue, de manière à générer une surpression à l'intérieur de ladite conduite 2. Cette surpression peut se traduire par une augmentation de la vitesse des gaz d'échappement ainsi qu'une détente à la sortie de ladite conduite 2. De plus, l'additif pourra être choisi liquide, comme par exemple de l'eau, qui sera vaporisée sous l'effet de la température des gaz d'échappement, diminuant pas conséquent la température de ces derniers et augmentant la pression à l'intérieur de la conduite 2.In addition, an additive may be added in the pipe 2, in the exhaust gas, by injection, vaporization or the like, so as to generate an overpressure inside said pipe 2. This excess pressure may result in a increasing the speed of the exhaust gas and a relaxation at the outlet of said pipe 2. In addition, the additive may be chosen liquid, such as water, which will be vaporized under the effect of temperature of the exhaust gas, thus decreasing the temperature of the latter and increasing the pressure inside the pipe 2.
Le dispositif 1 selon l'invention permet de refroidir le moteur d'un véhicule, même quand ce dernier est à l'arrêt et fonctionne de manière économique, sans utiliser d'énergie supplémentaire, au travers du recyclage des gaz d'échappement. De plus, il offre l'avantage de ne pas tomber en panne puisqu'il dépend de l'échappement des gaz et donc directement du fonctionnement du moteur. Enfin, plus le régime du moteur augmente, plus l'aspiration est élevée et le flux généré croit en fonction, refroidissant davantage le moteur ainsi sollicité.The device 1 according to the invention makes it possible to cool the engine of a vehicle, even when the latter is at a standstill and operates economically, without using additional energy, through the recycling of the exhaust gases. In addition, it offers the advantage of not failing since it depends on the exhaust gas and therefore directly from the operation of the engine. Finally, the higher the speed of the engine increases, the higher the suction and the generated flow increases in function, further cooling the engine thus solicited.
Le dispositif 1 présente encore l'avantage d'être compatible avec un système de refroidissement par ventilation déjà existant au niveau du moteur. Bien entendu, l'invention n'est pas limitée aux exemples illustrés et décrits précédemment qui peuvent présenter des variantes et modifications sans pour autant sortir du cadre de 1 ' invention . The device 1 still has the advantage of being compatible with a ventilation cooling system already existing at the engine. Of course, the invention is not limited to the examples illustrated and described above which may have variants and modifications without departing from the scope of the invention.

Claims

REVENDICATIONS
1. Dispositif (1) de production d'un flux d'air de refroidissement pour moteur thermique comprenant au moins une conduite (2) d'échappement des gaz et au moins un échangeur thermique (3) , caractérisé par le fait que ledit dispositif comporte :1. Device (1) for producing a cooling air flow for a heat engine comprising at least one gas exhaust duct (2) and at least one heat exchanger (3), characterized in that said device has:
des moyens (4) aptes à générer un flux d'air de refroidissement par aspiration par effet venturi par les gaz d' échappement ;means (4) capable of generating a flow of cooling air by suction by the venturi effect of the exhaust gas;
des moyens (5) de canalisation dudit flux d'air de refroidissement au travers dudit échangeur thermique (3) .means (5) for channeling said flow of cooling air through said heat exchanger (3).
2. Dispositif (1) selon la revendication 1, caractérisé par le fait que lesdits moyens de génération (4) du flux d'air sont situés au niveau des moyens de canalisation (5) en aval de l' échangeur thermique (3) .2. Device (1) according to claim 1, characterized in that said means (4) for generating the air flow are located at the channeling means (5) downstream of the heat exchanger (3).
3. Dispositif (1) selon l'une quelconque des revendications 1 ou 2 , caractérisé par le fait que lesdits moyens de génération (4) du flux d'air comprennent un venturi (6) dans lequel débouche lesdits moyens de canalisation (5) .3. Device (1) according to any one of claims 1 or 2, characterized in that said means (4) for generating the air flow comprise a venturi (6) into which said channeling means (5) .
4. Dispositif (1) selon la revendication 3, caractérisé par le fait que ledit venturi (6) se présente sous la forme d'un rétrécissement du diamètre de la conduite d'échappement (2) des gaz .4. Device (1) according to claim 3, characterized in that said venturi (6) is in the form of a narrowing of the diameter of the exhaust pipe (2) of the gases.
5. Dispositif (1) selon l'une quelconque des revendications 1 ou 2 , caractérisé par le fait que ladite conduite d' échappement (2) comprend des moyens d'injection (7) des gaz d'échappement dans les moyens de canalisation (5) suivant une composante orientée dans le sens de circulation du flux d' air dans lesdits moyens de canalisation (5) . 5. Device (1) according to any one of claims 1 or 2, characterized in that said exhaust pipe (2) comprises means (7) for injecting the exhaust gases into the channeling means ( 5) along a component oriented in the direction of flow of the air flow in said channeling means (5).
6. Dispositif (1) selon l'une quelconque des revendications précédentes, caractérisé par le fait que lesdits moyens de canalisation (5) comprennent un rétrécissement (8) de leur diamètre .6. Device (1) according to any one of the preceding claims, characterized in that said channeling means (5) comprise a narrowing (8) of their diameter.
7. Dispositif (1) selon l'une quelconque des revendications précédentes , caractérisé par le fait qu' il comprend des moyens de refroidissement (9) d'un fluide par compression puis détente desdits gaz d'échappement ou du flux d'air généré.7. Device (1) according to any one of the preceding claims, characterized in that it comprises means for cooling (9) a fluid by compression and then expansion of said exhaust gas or the air flow generated .
8. Dispositif (1) selon la revendication 7, caractérisé par le fait que ledit fluide de refroidissement est canalisé pour refroidir ledit échangeur thermique (3) .8. Device (1) according to claim 7, characterized in that said cooling fluid is channeled to cool said heat exchanger (3).
9. Dispositif selon l'une des revendications 7 ou 8, caractérisé par le fait que ledit fluide de refroidissement est canalisé pour refroidir ledit flux d'air généré au travers d'un échangeur thermique supplémentaire (11) . 9. Device according to one of claims 7 or 8, characterized in that said cooling fluid is channeled to cool said air flow generated through an additional heat exchanger (11).
PCT/FR2005/050679 2005-08-22 2005-08-22 Device for producing a cooling airflow for an engine WO2007023212A1 (en)

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PCT/FR2005/050679 WO2007023212A1 (en) 2005-08-22 2005-08-22 Device for producing a cooling airflow for an engine

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818590C (en) * 1950-01-12 1951-10-25 Kloeckner Humboldt Deutz Ag Internal combustion engine with cooling of the lubricating oil in a heat exchanger
GB734626A (en) * 1952-03-14 1955-08-03 Snecma Device which promotes circulation of air in a system acting to cool a multi-cylinder internal combustion engine
GB2252128A (en) * 1991-01-24 1992-07-29 S & C Thermofluids Ltd Providing intercooler air coolant flow in turbocharged engines.
WO2001098722A1 (en) * 2000-06-22 2001-12-27 Brabnod Mountain Gear, Llc Fluid cooling system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE818590C (en) * 1950-01-12 1951-10-25 Kloeckner Humboldt Deutz Ag Internal combustion engine with cooling of the lubricating oil in a heat exchanger
GB734626A (en) * 1952-03-14 1955-08-03 Snecma Device which promotes circulation of air in a system acting to cool a multi-cylinder internal combustion engine
GB2252128A (en) * 1991-01-24 1992-07-29 S & C Thermofluids Ltd Providing intercooler air coolant flow in turbocharged engines.
WO2001098722A1 (en) * 2000-06-22 2001-12-27 Brabnod Mountain Gear, Llc Fluid cooling system

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