EP2478205A1 - Gas heat exchanger, in particular for the exhaust gases of an engine - Google Patents

Gas heat exchanger, in particular for the exhaust gases of an engine

Info

Publication number
EP2478205A1
EP2478205A1 EP10752582A EP10752582A EP2478205A1 EP 2478205 A1 EP2478205 A1 EP 2478205A1 EP 10752582 A EP10752582 A EP 10752582A EP 10752582 A EP10752582 A EP 10752582A EP 2478205 A1 EP2478205 A1 EP 2478205A1
Authority
EP
European Patent Office
Prior art keywords
exchanger
housing
stainless steel
aluminum
cooling fluid
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.)
Withdrawn
Application number
EP10752582A
Other languages
German (de)
French (fr)
Inventor
Eva TOMÁS HERRERO
Silvia Guillen Lambea
Benjamín GRACIA LÁZARO
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.)
Valeo Termico SA
Original Assignee
Valeo Termico 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 Valeo Termico SA filed Critical Valeo Termico SA
Publication of EP2478205A1 publication Critical patent/EP2478205A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • 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 heat exchanger for gas, particularly for the exhaust gas of an engine.
  • the invention is particularly applicable in exhaust gas recirculation (EGRC) exchangers for gasoline and diesel applications.
  • the main function of the EGR exchangers is the exchange of heat between the exhaust gas and the coolant, in order to cool the gases.
  • EGR heat exchangers are widely used for diesel applications to reduce emissions.
  • cooled exhaust gas recirculation is emerging as a promising technology to cope with increased demand for fuel economy without compromising the efficiency of injection-ignition engines and turbo-compressors.
  • Size reduction in particular, is a promising strategy to reduce the fuel consumption of internal combustion engines. Nevertheless, reducing the size of turbocharged engines should take into account possible ignition problems and thermal limits of the materials to prevent engine damage.
  • the first is to delay the ignition time, to limit the pressure in the cylinder and one autoignition
  • the second is to inject a surplus fuel into the mixture, to limit the rate of combustion through dilution and limit the temperature rise of the exhaust gases.
  • the disadvantages of this are an increase in fuel consumption and an increase in CO and HC emissions.
  • EGR exhaust gas recirculation
  • EGR exchangers on the market is a metal heat exchanger typically made of stainless steel or aluminum.
  • EGR heat exchanger there are two types: a first type consists of a housing inside which there is a bundle of parallel tubes for the passage of gases, the refrigerant circulating in the housing, outside tubes, and the second type consists of a series of parallel plates which constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate between two plates, in alternating layers, with the possibility of including fins to improve the heat exchange.
  • the assembly between the tubes and the housing can be of different types.
  • the tubes are fixed at their ends between two support plates connected to each end of the housing, the two support plates having a plurality of orifices for the installation of the respective tubes.
  • connection means with the recirculation line which may consist of a V-shaped connection or a peripheral collar or flange, depending on the design of the recirculation line in which is connected the exchanger.
  • the peripheral collar can be assembled with a gas tank, so that the gas tank is an intermediate piece between the housing and the collar, or the collar can be assembled directly to the housing.
  • EGR exchangers In both types of EGR exchangers, most of their components are metallic, so that they are assembled by mechanical means and then oven-welded or arc-welded or laser-welded to ensure the correct sealing required this application.
  • the EGR exchanger may also include some components made of plastic, which can perform a single or various functions by being made in one piece, such as, for example, the plastic housing that integrates the tubes of the circuit. coolant and mounting brackets to the engine environment.
  • plastic housing that integrates the tubes of the circuit. coolant and mounting brackets to the engine environment.
  • the majority of EGR exchangers on the market are stainless steel and, in a small number of cases, aluminum.
  • the exchanger made of aluminum is much lighter than the stainless steel one. This advantage is very important for the user because of the impact on fuel consumption.
  • the purpose of the gas heat exchanger, in particular for the exhaust gases of an engine, according to the present invention is to overcome the drawbacks that the known heat exchangers present, by proposing a heat exchanger which has the advantages of combining stainless steel and aluminum and maintaining adequate production yield and cost.
  • the gas heat exchanger in particular for the exhaust gases of an engine, which is the subject of the present invention, is characterized in that it comprises a first part, arranged at the inlet of the gases, manufactured from a first metal, and a second portion disposed subsequent to said first portion along the gas flow, manufactured from a second metal having a lower melting temperature than said first portion, and said first portion is able to reduce the temperature of the gases before they pass through said second part.
  • the first part is made of stainless steel and the second part is made of aluminum.
  • the specifications of the vehicle manufacturers currently required are based on the efficiency and compactness of the EGR exchangers.
  • An aluminum heat exchanger can meet this specification, ie high efficiency in a small volume, but due to the characteristics of the exhaust gases (temperature and composition) it is not always possible to 'use.
  • the combined heat exchanger according to the present invention solves these problems by taking advantage of the properties of the aluminum heat exchangers.
  • the combined heat exchanger according to the present invention is much more compact than an exchanger made entirely of stainless steel.
  • the problems of integration of the engine are resolved for the vehicle manufacturers, because it is possible to hold an EGR exchanger in a space where a steel heat exchanger does not fit because of the long length it needs to meet the specifications of the vehicle manufacturers.
  • the combined heat exchanger of the present invention is much lighter than a stainless steel heat exchanger providing the same efficiency due to the use of an aluminum part.
  • the combined heat exchanger according to the present invention is cheaper than an equivalent stainless steel heat exchanger due to the use of an aluminum part.
  • the combined heat exchanger according to the present invention comprises an optimized junction, as will be explained hereinafter, between the parts respectively of stainless steel and aluminum and cost advantages are obtained compared with a steel exchanger.
  • the first part comprises a collar or connecting flange.
  • the first part is manufactured as a beam for the circulation of gases with heat exchange with a cooling fluid around.
  • the second portion is fabricated as a second beam for circulating gases with heat exchange with a cooling fluid around.
  • the two beam-shaped parts are housed in at least one housing.
  • the beam of the exchanger it is also possible to manufacture the outer casing in different ways using different materials and / or different types of junctions.
  • the exchanger comprises a first stainless steel housing housing the first beam and a second aluminum housing housing the second beam.
  • the junction of the two housings can be realized in different ways.
  • a first option is that the two housings are united by means of a single collar or connection flange forming part of the first stainless steel housing.
  • the second aluminum housing is capable of being assembled directly to the single collar by means of an oven welding. This type of connection is probably the best solution from an economic point of view.
  • a second option is that the two housings are united by means of two collars or connection flanges each forming part of a housing.
  • said two collars are united by means of hardware elements, with a seal in the middle.
  • This type of connection is very simple.
  • each beam is associated with its own independent cooling fluid circuit, each circuit comprising its respective inlet and outlet tubes for cooling fluid.
  • the two beams share the same coolant circuit.
  • said circuit must be redefined to allow the transport of cooling fluid from one housing to another. This is why we can adopt different solutions:
  • a first option consists in that the exchanger comprises a substantially semicircular outer conduit which connects the two housings for the passage of cooling fluid from one housing to the other, said duct being made of stainless steel or aluminum.
  • a second option consists in that the exchanger comprises a piece in the form of a cover which connects the two housings for the passage of the cooling fluid from one casing to the other, said part being made of stainless steel or aluminum.
  • a third option is that the exchanger comprises two assembled lid-shaped parts which connect the two housings for the passage of cooling fluid from one housing to the other, the first part being made of stainless steel and the second part in aluminium.
  • the first piece is integral with the common collar made of stainless steel located between the two housings and the second part may be connected to the common collar during the process of welding the second housing.
  • the exchanger comprises a single housing which houses the two beams, first and second, the cooling fluid circuit being common.
  • Figure 1 is an elevational view of the exchanger according to the invention, showing a first embodiment of the junction of the two housings by means of a single collar;
  • Figure 2 is an elevational view of the exchanger according to the invention, showing a second embodiment of the junction of the two housings by means of two collars;
  • Figures 3 to 5 show a longitudinal section of the exchanger, showing respectively different variants of the connecting element between the two housings for the passage of cooling fluid from one housing to another.
  • the heat exchanger 1 for gas particularly for the exhaust gases of an engine, comprises a first part 2 arranged on the gas inlet, made of stainless steel, and a second part 3 disposed following said first part 2 following the gas flow, made of aluminum.
  • the second aluminum part 3 has a lower melting temperature than that of said first part 2 made of stainless steel. Likewise, said first part 2 is capable of reducing the temperature of the gases before they pass through said second part 3.
  • the first part 2 made of stainless steel will be manufactured as small as possible but always guaranteeing a maximum temperature of the exhaust gas at its outlet of approximately 550 ° C.
  • the second aluminum part 3 must guarantee the exhaust temperature required by the user which, depending on the engine, can be between 150 ° C and 200 ° C, or even less.
  • the total size of the heat exchanger 1 according to the present invention is much more compact and short, compared with the size required if an exchanger was used. of unique stainless steel heat to achieve the same performance.
  • the first part 2 is manufactured as a beam for the circulation of gases with heat exchange with a cooling fluid around; although this could also be a flange or fitting flange (not shown).
  • said gas tubes may have a circular section or may also be flattened with an oval section and have two opposite faces larger and larger. close to each other than the other two opposite faces.
  • the gas tubes may have smooth walls or they may include ribs or corrugations to improve the thermal efficiency of the heat exchanger.
  • the second part 3 is made as a second beam for the circulation of gases with heat exchange with a cooling fluid around.
  • the tubes can be extruded, arc-welded or folded from a plate and then oven-welded.
  • fins may or may not be included inside said tubes.
  • the aluminum beam can be manufactured in one piece by extrusion.
  • the two beam-shaped portions 2 and 3 are housed in at least one outer casing 4 and 5.
  • the casing can also be made in different ways using different materials and / or different types of junctions.
  • the heat exchanger 1 comprises a first stainless steel casing 4 which houses the first beam 2 and a second aluminum casing 5 which houses the second beam 3.
  • the junction of the two housings 4 and 5 can be realized in different ways.
  • a first option, shown in Figure 1, is that the two housings 4 and 5 are united by means of a single collar or connecting flange 6 forming part of the first housing 4 of stainless steel.
  • the second aluminum housing 5 is capable of being assembled directly to the single collar 6 by means of an oven welding. This type of connection is the best solution.
  • the first housing 4 made of stainless steel must be baked in the oven first, so that the common collar 6 is also made of steel. stainless to guarantee the assembly of the components. Then, the aluminum housing 5 is welded to the collar 6 integral with the housing 4 of stainless steel.
  • a second option, shown in Figure 2 is that the two housings 4 and 5 are united by means of two collars or connecting flanges 6 and 7 each forming part of a housing 4 or 5. Said two collars 6 and 7 central are joined by means of hardware 8, with a seal in the middle. This type of connection is the simplest.
  • the cooling fluid circuit may be the same for the two beams 2 and 3, or each beam 2 or 3 may have its own independent circuit, as shown in Figures 1 and 2, wherein each circuit comprises its respective inlet tubes 4a, 5a and 4b, 5b output of cooling fluid.
  • each circuit comprises its respective inlet tubes 4a, 5a and 4b, 5b output of cooling fluid.
  • a first option represented in FIG. 3, consists in that the exchanger 1 comprises an outermost substantially circular duct 9 which connects the two housings 4 and 5 for the passage of the cooling fluid from a casing 4 to the casing 4. other 5.
  • Said duct 9 may be stainless steel or aluminum.
  • a second option, shown in FIG. 4, consists in that the exchanger 1 comprises a piece 10 in the form of a cover which connects the two housings 4 and 5 for the passage of the cooling fluid from one casing 4 to the other 5, said part 10 may be stainless steel or aluminum.
  • a third option, represented in FIG. 5, consists in that the exchanger 1 comprises two parts 10 and 11 assembled in the form of a cover which connect the two housings 4 and 5 for the passage of the cooling fluid from a housing 4 to the other 5, the first piece 10 being made of stainless steel and the second piece 11 of aluminum.
  • the first piece 10 is integral with the common collar 6 of stainless steel located between the two housings 4 and 5 and the second part 11 can be connected to the common collar 6 during the process of welding the second housing 5 in the oven.
  • the two beams 2 and 3 are fed with two different types of cooling fluid, at the same temperature or at a different temperature: one with a high temperature cooling fluid (HT) and the other with a fluid of low temperature cooling (LT).
  • HT high temperature cooling fluid
  • LT low temperature cooling
  • this application can be used in both cases of the standard type of cooling fluid connection tubes.
  • the exchanger comprises a single housing (not shown) which houses the two beams, first 2 and second 3, the cooling fluid circuit being common.
  • Said single housing can be made of a single material that covers the two beams of the exchanger.
  • the housing can be made not only of stainless steel or aluminum, it can also be made of plastic.
  • the housing can integrate different functions such as supports for fixing the heat exchanger to the engine environment.
  • the housing it can be divided into two or more parts in a longitudinal or transverse division and then be assembled once the two beams 2 and 3 have been arranged inside.
  • Said housing may comprise different shapes to provide different functions such as integrating the inlet and outlet tubes of the cooling fluid.
  • Said tubes may be in the gas inlet and outlet zones in the housing or in the middle between the two beams. Another function of the housing can be to play the role of supporting the beam via the support plates.
  • the outer shape of the housing may be increased longitudinally or only in a few areas to accommodate the dimensions of the corresponding beam or to provide support for the support plates.
  • the EGR exchanger designs described herein can be easily applied in "I" configurations, i.e., where the gas inlet and outlet are disposed at opposite ends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention relates to a gas heat exchanger, in particular for the exhaust gases of an engine. It includes a first portion (2) arranged at the gas intake, which is made of a first metal, and a second portion (3) arranged following said first portion (2) and along the gas stream, which is made of a second metal having a melting temperature lower than that of said first portion (2), wherein said first portion (2) is capable of reducing the temperature of the gases before the same pass through said second portion (3). Preferably, the first portion (2) is made of stainless steel and the second portion (3) is made of aluminum. A heat exchanger is obtained which has the advantages of combining stainless steel and aluminum and of maintaining suitable efficiency and costs.

Description

ÉCHANGEUR DE CHALEUR POUR GAZ, PARTICULIÈREMENT POUR LES HEAT EXCHANGER FOR GAS, ESPECIALLY FOR
GAZ D'ÉCHAPPEMENT D'UN MOTEUR EXHAUST GAS OF AN ENGINE
La présente invention concerne un échangeur de chaleur pour gaz, particulièrement pour les gaz d'échappement d'un moteur. The present invention relates to a heat exchanger for gas, particularly for the exhaust gas of an engine.
L'invention s'applique spécialement dans les échangeurs de recirculation des gaz d'échappement (EGRC) , pour des applications essence et diésel . CONTEXTE DE L'INVENTION  The invention is particularly applicable in exhaust gas recirculation (EGRC) exchangers for gasoline and diesel applications. BACKGROUND OF THE INVENTION
La fonction principale des échangeurs EGR est l'échange de chaleur entre les gaz d'échappement et le fluide de refroidissement, dans le but de refroidir les gaz. The main function of the EGR exchangers is the exchange of heat between the exhaust gas and the coolant, in order to cool the gases.
Actuellement, les échangeurs de chaleur EGR sont largement utilisés pour des applications diésel afin de réduire les émissions.  Currently, EGR heat exchangers are widely used for diesel applications to reduce emissions.
Le marché tend à réduire la taille des moteurs et à appliquer les échangeurs de chaleur EGR non seulement dans les applications haute pression (HP) mais aussi dans celles basse pression (LP) ; toutes les deux ont un impact sur la conception des échangeurs de chaleur EGR. Les constructeurs de véhicules exigent des échangeurs de chaleur EGR avec de meilleurs rendements et, en même temps, l'espace disponible pour placer l' échangeur et ses composants est de plus en plus petit, ce qui les rend de plus en plus difficiles à intégrer.  The market tends to reduce engine size and to apply EGR heat exchangers not only in high pressure (HP) applications but also in low pressure (LP) applications; both have an impact on the design of the EGR heat exchangers. Vehicle manufacturers are demanding EGR heat exchangers with better efficiencies and, at the same time, the space available for placing the exchanger and its components is becoming smaller, making them more and more difficult to integrate. .
Parallèlement, la recirculation des gaz d'échappement refroidis apparaît comme une technologie prometteuse pour faire face à l'augmentation d'une demande d'économie de carburant sans compromettre le rendement des moteurs à allumage par injection et turbo-compresseur . La réduction de la taille, en particulier, est une stratégie prometteuse pour diminuer la consommation en carburant des moteurs à combustion interne. Néanmoins, la réduction de la taille des moteurs à turbocompresseur doit tenir compte des éventuels problèmes d ' autoallumage et des limites thermiques des matériaux pour éviter un dommage au moteur . At the same time, cooled exhaust gas recirculation is emerging as a promising technology to cope with increased demand for fuel economy without compromising the efficiency of injection-ignition engines and turbo-compressors. Size reduction, in particular, is a promising strategy to reduce the fuel consumption of internal combustion engines. Nevertheless, reducing the size of turbocharged engines should take into account possible ignition problems and thermal limits of the materials to prevent engine damage.
À cette fin, on utilise généralement deux stratégies : la première consiste à retarder le temps d'allumage, pour limiter la pression dans le cylindre et 1 ' autoallumage, et la seconde consiste à injecter un excédent de carburant dans le mélange, pour limiter la vitesse de combustion à travers la dilution et limiter la hausse de température des gaz d'échappement. Les inconvénients que cela présente sont une augmentation de la consommation de carburant et l'accroissement des émissions de CO et de HC .  To this end, two strategies are generally used: the first is to delay the ignition time, to limit the pressure in the cylinder and one autoignition, and the second is to inject a surplus fuel into the mixture, to limit the rate of combustion through dilution and limit the temperature rise of the exhaust gases. The disadvantages of this are an increase in fuel consumption and an increase in CO and HC emissions.
Une solution alternative et efficace qui apparaît comme une technologie prometteuse pour limiter les problèmes d ' autoallumage à travers la dilution est la recirculation des gaz d'échappement refroidis (EGR) . Le système EGR a un grand potentiel pour améliorer les économies de carburant.  An alternative and effective alternative that appears to be a promising technology for limiting autoignition problems through dilution is cooled exhaust gas recirculation (EGR). The EGR system has great potential to improve fuel economy.
La configuration actuelle des échangeurs EGR présents sur le marché (pour des applications diésel) correspond à un échangeur de chaleur métallique généralement fabriqué en acier inoxydable ou en aluminium.  The current configuration of EGR exchangers on the market (for diesel applications) is a metal heat exchanger typically made of stainless steel or aluminum.
Fondamentalement, il y a deux types d' échangeurs de chaleur EGR : un premier type consiste en un boîtier à l'intérieur duquel on dispose un faisceau de tubes parallèles pour le passage des gaz, le réfrigérant circulant dans le boîtier, à l'extérieur des tubes, et le second type se compose d'une série de plaques parallèles qui constituent les surfaces d'échange de chaleur, de sorte que les gaz d'échappement et le réfrigérant circulent entre deux plaques, en couches alternées, avec possibilité d'inclure des ailettes pour améliorer l'échange de chaleur. Basically, there are two types of EGR heat exchanger: a first type consists of a housing inside which there is a bundle of parallel tubes for the passage of gases, the refrigerant circulating in the housing, outside tubes, and the second type consists of a series of parallel plates which constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate between two plates, in alternating layers, with the possibility of including fins to improve the heat exchange.
Dans le cas d'échangeurs de chaleur à faisceau de tubes, l'assemblage entre les tubes et le boîtier peut être de différents types. Généralement, les tubes sont fixés par leurs extrémités entre deux plaques de support raccordées à chaque extrémité du boîtier, les deux plaques de support présentant une pluralité d'orifices pour l'installation des tubes respectifs.  In the case of tube bundle heat exchangers, the assembly between the tubes and the housing can be of different types. Generally, the tubes are fixed at their ends between two support plates connected to each end of the housing, the two support plates having a plurality of orifices for the installation of the respective tubes.
Lesdites plaques de support sont fixées à leur tour à des moyens de raccordement avec la ligne de recirculation, qui peuvent consister en un montage en V ou bien en un collet périphérique de raccordement ou bride, en fonction de la conception de la ligne de recirculation dans laquelle est assemblé l'échangeur. Le collet périphérique peut être assemblé avec un réservoir à gaz, de façon à ce que le réservoir à gaz soit une pièce intermédiaire entre le boîtier et le collet, ou bien le collet peut être assemblé directement au boîtier.  Said support plates are in turn fastened to connection means with the recirculation line, which may consist of a V-shaped connection or a peripheral collar or flange, depending on the design of the recirculation line in which is connected the exchanger. The peripheral collar can be assembled with a gas tank, so that the gas tank is an intermediate piece between the housing and the collar, or the collar can be assembled directly to the housing.
Dans les deux types d'échangeurs EGR, la plupart de leurs composants sont métalliques, de sorte qu'ils sont assemblés par des moyens mécaniques et ensuite soudés au four ou soudés à l'arc ou au laser pour assurer l'étanchéité correcte que requiert cette application.  In both types of EGR exchangers, most of their components are metallic, so that they are assembled by mechanical means and then oven-welded or arc-welded or laser-welded to ensure the correct sealing required this application.
Dans certains cas, l'échangeur EGR peut aussi comprendre quelques composants fabriqués en plastique, lesquels peuvent remplir une unique ou diverses fonctions en étant fabriqués d'une seule pièce, comme, par exemple, le boîtier en plastique qui intègre les tubes du circuit du fluide de refroidissement et les supports de fixation à l'environnement moteur. La majorité des échangeurs EGR présents sur le marché sont en acier inoxydable et, dans un petit nombre de cas, en aluminium. In some cases, the EGR exchanger may also include some components made of plastic, which can perform a single or various functions by being made in one piece, such as, for example, the plastic housing that integrates the tubes of the circuit. coolant and mounting brackets to the engine environment. The majority of EGR exchangers on the market are stainless steel and, in a small number of cases, aluminum.
Néanmoins, dans quelques applications, on peut trouver un mélange des deux matériaux. On connaît quelques solutions où l'acier inoxydable est utilisé pour le faisceau de l'échangeur, c'est-à-dire pour le faisceau de tubes en contact avec les gaz d'échappement, et où l'aluminium est utilisé pour le boîtier en contact avec le fluide de refroidissement.  Nevertheless, in some applications, one can find a mixture of the two materials. Some solutions are known where stainless steel is used for the heat exchanger bundle, ie for the tube bundle in contact with the exhaust gas, and where the aluminum is used for the housing. in contact with the cooling fluid.
L'emploi de l'aluminium est une solution préférée pour l'échangeur, principalement pour les raisons suivantes :  The use of aluminum is a preferred solution for the exchanger, mainly for the following reasons:
- La conductivité de l'aluminium est très supérieure à celle de l'acier inoxydable. Si on compare les efficacités du même échangeur réalisé dans les deux matériaux, on observe que le rendement est supérieur dans le cas de l'échangeur en aluminium.  - The conductivity of aluminum is much higher than that of stainless steel. If we compare the efficiencies of the same exchanger made in the two materials, we observe that the efficiency is higher in the case of the aluminum heat exchanger.
- Moindre poids. L'échangeur fabriqué en aluminium est beaucoup plus léger que celui en acier inoxydable. Cet avantage est très important pour l'utilisateur en raison de l'impact sur la consommation de carburant. - Less weight. The exchanger made of aluminum is much lighter than the stainless steel one. This advantage is very important for the user because of the impact on fuel consumption.
- Moindre coût. La matière première de l'aluminium est meilleur marché que celle de l'acier inoxydable. Cependant, les échangeurs EGR en aluminium présentent quelques inconvénients qui dans certains cas ne permettent pas son utilisation et il est alors nécessaire de le remplacer par l'acier inoxydable. Quelques-uns de ces inconvénients sont : - Lower cost. The raw material of aluminum is cheaper than that of stainless steel. However, aluminum EGR exchangers have some disadvantages that in some cases do not allow its use and it is then necessary to replace it with stainless steel. Some of these disadvantages are:
- Corrosion : Dans les applications diésel, la corrosion est le principal problème conduisant à ne pas utiliser d' échangeurs en aluminium. Dans ce cas, le gaz d'échappement a un pH acide, compris entre 2 et 3,5, et avec les composants acides qui se condensent dans les échangeurs de chaleur, ils peuvent provoquer des problèmes de corrosion et de piqûres dans les échangeurs. Néanmoins, dans les moteurs à essence, les condensats qui se produisent sont moins acides, ce qui indique que ce type de corrosion par piqûre est improbable. - Corrosion: In diesel applications, corrosion is the main problem leading to not using aluminum heat exchangers. In this case, the exhaust gas has an acidic pH of between 2 and 3.5, and with the acid components that condense in the heat exchangers, they can cause problems of corrosion and pitting in the exchangers. Nevertheless, in gasoline engines, condensates that occur are less acidic, indicating that this type of pitting corrosion is unlikely.
Température : Comme on l'a mentionné précédemment, l'aluminium est limité quant à sa température de fonctionnement. La température maximale pour l'aluminium est d'à peu près 250°C en fonctionnement continu et de 300 °C en pointes (en température de paroi) . Ces valeurs de température de paroi impliquent une température d'entrée des gaz entre 550°C et 600°C. Ce fait permet l'utilisation d' échangeurs en aluminium dans les applications diésel, mais dans les moteurs à essence la température d'entrée des gaz dans les échangeurs peut atteindre 850°C, ce qui ne permet pas son utilisation .  Temperature: As previously mentioned, aluminum is limited in its operating temperature. The maximum temperature for aluminum is approximately 250 ° C in continuous operation and 300 ° C in peaks (in wall temperature). These wall temperature values imply a gas inlet temperature between 550 ° C and 600 ° C. This fact allows the use of aluminum exchangers in diesel applications, but in gasoline engines the gas inlet temperature in the exchangers can reach 850 ° C, which does not allow its use.
DESCRIPTION DE L'INVENTION DESCRIPTION OF THE INVENTION
L'objectif de l'échangeur de chaleur pour gaz, en particulier pour les gaz d'échappement d'un moteur, selon la présente invention est de venir à bout des inconvénients que présentent les échangeurs connus, en proposant un échangeur de chaleur qui présente les avantages de combiner l'acier inoxydable et l'aluminium et de conserver un rendement et un coût de production adéquats. The purpose of the gas heat exchanger, in particular for the exhaust gases of an engine, according to the present invention is to overcome the drawbacks that the known heat exchangers present, by proposing a heat exchanger which has the advantages of combining stainless steel and aluminum and maintaining adequate production yield and cost.
L'échangeur de chaleur pour gaz, en particulier pour les gaz d'échappement d'un moteur, objet de la présente invention, est caractérisé en ce qu'il comprend une première partie, disposée à l'entrée des gaz, fabriquée dans un premier métal, et une seconde partie, disposée à la suite de ladite première partie le long du flux gazeux, fabriquée dans un second métal qui présente une température de fusion inférieure à celle de ladite première partie et en ce que ladite première partie est capable de réduire la température des gaz avant qu'ils ne passent par ladite seconde partie. The gas heat exchanger, in particular for the exhaust gases of an engine, which is the subject of the present invention, is characterized in that it comprises a first part, arranged at the inlet of the gases, manufactured from a first metal, and a second portion disposed subsequent to said first portion along the gas flow, manufactured from a second metal having a lower melting temperature than said first portion, and said first portion is able to reduce the temperature of the gases before they pass through said second part.
De cette façon, dans la première partie on réussit à abaisser suffisamment la température des gaz, jusqu'à une valeur compatible avec les propriétés thermiques du matériau de la seconde partie.  In this way, in the first part it is possible to lower the temperature of the gases sufficiently to a value compatible with the thermal properties of the material of the second part.
Avantageusement, la première partie est en acier inoxydable et la seconde partie est en aluminium.  Advantageously, the first part is made of stainless steel and the second part is made of aluminum.
Quelques-uns des principaux avantages de l'échangeur de chaleur selon la présente invention, combinant acier inoxydable dans la première partie et aluminium dans la seconde partie, sont décrits ci-après : Some of the main advantages of the heat exchanger according to the present invention, combining stainless steel in the first part and aluminum in the second part, are described below:
- Les spécifications des constructeurs de véhicules actuellement exigées se basent sur l'efficacité et la compacité des échangeurs EGR. Un échangeur en aluminium peut satisfaire à ce cahier des charges, c'est-à-dire haut rendement dans un petit volume, mais en raison des caractéristiques des gaz d'échappement (température et composition) il n'est pas toujours possible de l'utiliser. L'échangeur de chaleur combiné selon la présente invention résout ces problèmes en profitant des propriétés des échangeurs en aluminium. - The specifications of the vehicle manufacturers currently required are based on the efficiency and compactness of the EGR exchangers. An aluminum heat exchanger can meet this specification, ie high efficiency in a small volume, but due to the characteristics of the exhaust gases (temperature and composition) it is not always possible to 'use. The combined heat exchanger according to the present invention solves these problems by taking advantage of the properties of the aluminum heat exchangers.
- L'échangeur de chaleur combiné selon la présente invention est beaucoup plus compact qu'un échangeur fabriqué entièrement en acier inoxydable. Il en résulte que se résolvent pour les constructeurs de véhicules les problèmes d'intégration du moteur, car il est possible de faire tenir un échangeur EGR dans un espace où un échangeur de chaleur en acier ne rentre pas en raison de la grande longueur dont il a besoin pour satisfaire aux spécifications des constructeurs de véhicules. The combined heat exchanger according to the present invention is much more compact than an exchanger made entirely of stainless steel. As a result, the problems of integration of the engine are resolved for the vehicle manufacturers, because it is possible to hold an EGR exchanger in a space where a steel heat exchanger does not fit because of the long length it needs to meet the specifications of the vehicle manufacturers.
L' échangeur de chaleur combiné selon la présente invention est beaucoup plus léger qu'un échangeur de chaleur en acier inoxydable offrant la même efficacité, en raison de l'utilisation d'une partie en aluminium.  The combined heat exchanger of the present invention is much lighter than a stainless steel heat exchanger providing the same efficiency due to the use of an aluminum part.
L' échangeur de chaleur combiné selon la présente invention est meilleur marché qu'un échangeur en acier inoxydable équivalent, en raison de l'utilisation d'une partie en aluminium.  The combined heat exchanger according to the present invention is cheaper than an equivalent stainless steel heat exchanger due to the use of an aluminum part.
L' échangeur de chaleur combiné selon la présente invention comprend une jonction optimisée, comme nous l'expliquerons ci-après, entre les parties respectivement en acier inoxydable et en aluminium et l'on obtient des avantages de coût par comparaison avec un échangeur en acier inoxydable. Selon un mode de réalisation de la présente invention, la première partie comprend un collet ou bride de raccord.  The combined heat exchanger according to the present invention comprises an optimized junction, as will be explained hereinafter, between the parts respectively of stainless steel and aluminum and cost advantages are obtained compared with a steel exchanger. stainless. According to an embodiment of the present invention, the first part comprises a collar or connecting flange.
Selon un autre mode de réalisation de la présente invention, la première partie est fabriquée comme un faisceau destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement autour.  According to another embodiment of the present invention, the first part is manufactured as a beam for the circulation of gases with heat exchange with a cooling fluid around.
Dans la première partie en acier inoxydable, on peut utiliser différentes technologies pour le faisceau.  In the first part of stainless steel, one can use different technologies for the beam.
De préférence, la seconde partie est fabriquée comme un second faisceau destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement autour .  Preferably, the second portion is fabricated as a second beam for circulating gases with heat exchange with a cooling fluid around.
Dans la seconde partie en aluminium, on peut utiliser différentes technologies pour refroidir les gaz.In the second aluminum part, you can use different technologies to cool the gases.
Avantageusement, les deux parties en forme de faisceau sont logées dans au moins un boîtier. Advantageously, the two beam-shaped parts are housed in at least one housing.
De même que pour le faisceau de l'échangeur, on peut aussi fabriquer le boîtier externe de différentes manières en utilisant différents matériaux et/ou différents types de jonctions.  As for the beam of the exchanger, it is also possible to manufacture the outer casing in different ways using different materials and / or different types of junctions.
Selon un premier mode de réalisation du boîtier, l'échangeur comprend un premier boîtier en acier inoxydable qui loge le premier faisceau et un second boîtier en aluminium qui loge le second faisceau.  According to a first embodiment of the housing, the exchanger comprises a first stainless steel housing housing the first beam and a second aluminum housing housing the second beam.
La jonction des deux boîtiers peut se réaliser de différentes manières.  The junction of the two housings can be realized in different ways.
Une première option consiste en ce que les deux boîtiers sont unis au moyen d'un unique collet ou bride de raccord faisant partie du premier boîtier en acier inoxydable .  A first option is that the two housings are united by means of a single collar or connection flange forming part of the first stainless steel housing.
De préférence, le second boîtier en aluminium est susceptible d'être assemblé directement au collet unique au moyen d'un soudage au four. Ce type de raccord est probablement la meilleure solution d'un point de vue économique .  Preferably, the second aluminum housing is capable of being assembled directly to the single collar by means of an oven welding. This type of connection is probably the best solution from an economic point of view.
Une seconde option consiste en ce que les deux boîtiers sont unis au moyen de deux collets ou brides de raccord faisant chacun partie d'un boîtier.  A second option is that the two housings are united by means of two collars or connection flanges each forming part of a housing.
De préférence, lesdits deux collets sont unis au moyen d'éléments de visserie, avec un joint d'étanchéité au milieu. Ce type de raccord est très simple.  Preferably, said two collars are united by means of hardware elements, with a seal in the middle. This type of connection is very simple.
Selon un mode de réalisation, chaque faisceau est associé à son propre circuit de fluide de refroidissement indépendant, chaque circuit comprenant ses tubes respectifs d'entrée et sortie de fluide de refroidissement .  According to one embodiment, each beam is associated with its own independent cooling fluid circuit, each circuit comprising its respective inlet and outlet tubes for cooling fluid.
Selon un autre mode de réalisation, les deux faisceaux partagent le même circuit de fluide de refroidissement. Dans ce cas, ledit circuit doit être redéfini pour permettre le transport du fluide de refroidissement d'un boîtier à l'autre. C'est pourquoi on peut adopter différentes solutions : According to another embodiment, the two beams share the same coolant circuit. In this case, said circuit must be redefined to allow the transport of cooling fluid from one housing to another. This is why we can adopt different solutions:
Une première option consiste en ce que 1 ' échangeur comprend un conduit externe sensiblement semi-circulaire qui relie les deux boîtiers pour le passage du fluide de refroidissement d'un boîtier à l'autre, ledit conduit étant en acier inoxydable ou en aluminium.  A first option consists in that the exchanger comprises a substantially semicircular outer conduit which connects the two housings for the passage of cooling fluid from one housing to the other, said duct being made of stainless steel or aluminum.
Une deuxième option consiste en ce que 1 ' échangeur comprend une pièce en forme de couvercle qui relie les deux boîtiers pour le passage du fluide de refroidissement d'un boîtier à l'autre, ladite pièce étant en acier inoxydable ou en aluminium.  A second option consists in that the exchanger comprises a piece in the form of a cover which connects the two housings for the passage of the cooling fluid from one casing to the other, said part being made of stainless steel or aluminum.
Une troisième option consiste en ce que l' échangeur comprend deux pièces en forme de couvercle assemblées qui relient les deux boîtiers pour le passage du fluide de refroidissement d'un boîtier à l'autre, la première pièce étant en acier inoxydable et la seconde pièce en aluminium.  A third option is that the exchanger comprises two assembled lid-shaped parts which connect the two housings for the passage of cooling fluid from one housing to the other, the first part being made of stainless steel and the second part in aluminium.
De préférence, la première pièce est monobloc avec le collet commun en acier inoxydable situé entre les deux boîtiers et la seconde pièce est susceptible d'être raccordée au collet commun pendant le processus de soudage au four du second boîtier.  Preferably, the first piece is integral with the common collar made of stainless steel located between the two housings and the second part may be connected to the common collar during the process of welding the second housing.
Selon un second mode de réalisation, l' échangeur comprend un boîtier unique qui loge les deux faisceaux, premier et second, le circuit de fluide de refroidissement étant commun. BRÈVE DESCRIPTION DES DESSINS  According to a second embodiment, the exchanger comprises a single housing which houses the two beams, first and second, the cooling fluid circuit being common. BRIEF DESCRIPTION OF THE DRAWINGS
Afin de faciliter la description de tout ce qu'on a exposé antérieurement on annexe quelques dessins dans lesquels, schématiquement et seulement à titre d'exemple non limitatif, on représente un cas pratique de réalisation de l'échangeur de chaleur pour gaz selon la présente invention, parmi lesquels : In order to facilitate the description of everything that has been explained previously, some drawings are which, schematically and only by way of non-limiting example, represents a practical case of realization of the gas heat exchanger according to the present invention, among which:
la Figure 1 est une vue en élévation de l'échangeur selon l'invention, montrant un premier mode de réalisation de la jonction des deux boîtiers au moyen d'un collet unique ;  Figure 1 is an elevational view of the exchanger according to the invention, showing a first embodiment of the junction of the two housings by means of a single collar;
la Figure 2 est une vue en élévation de l'échangeur selon l'invention, montrant un second mode de réalisation de la jonction des deux boîtiers au moyen de deux collets ; et  Figure 2 is an elevational view of the exchanger according to the invention, showing a second embodiment of the junction of the two housings by means of two collars; and
les Figures 3 à 5 représentent une section longitudinale de l'échangeur, montrant respectivement différentes variantes de l'élément de jonction entre les deux boîtiers pour le passage du fluide de refroidissement d'un boîtier à l'autre.  Figures 3 to 5 show a longitudinal section of the exchanger, showing respectively different variants of the connecting element between the two housings for the passage of cooling fluid from one housing to another.
DESCRIPTION D'UN MODE DE RÉALISATION PRÉFÉRÉ Si l'on se reporte aux Figures 1 et 2, l'échangeur de chaleur 1 pour gaz, particulièrement pour les gaz d'échappement d'un moteur, comprend une première partie 2 disposée à l'entrée des gaz, fabriquée en acier inoxydable, et une seconde partie 3 disposée à la suite de ladite première partie 2 en suivant le flux gazeux, fabriquée en aluminium. DESCRIPTION OF A PREFERRED EMBODIMENT Referring to FIGS. 1 and 2, the heat exchanger 1 for gas, particularly for the exhaust gases of an engine, comprises a first part 2 arranged on the gas inlet, made of stainless steel, and a second part 3 disposed following said first part 2 following the gas flow, made of aluminum.
La seconde partie 3 en aluminium présente une température de fusion inférieure à celle de ladite première partie 2 en acier inoxydable. De même, ladite première partie 2 est capable de réduire la température des gaz avant qu'ils ne passent par ladite seconde partie 3.  The second aluminum part 3 has a lower melting temperature than that of said first part 2 made of stainless steel. Likewise, said first part 2 is capable of reducing the temperature of the gases before they pass through said second part 3.
De cette façon, grâce aux propriétés thermiques de l'acier inoxydable de la première partie 2, on réussit à abaisser suffisamment la température des gaz, jusqu'à une valeur compatible avec les propriétés thermiques de l'aluminium de la seconde partie 3. In this way, thanks to the thermal properties of the stainless steel of the first part 2, it is possible to lower the temperature of the gases sufficiently to a value compatible with the thermal properties of the aluminum of the second part 3.
On fabriquera la première partie 2 en acier inoxydable la plus petite possible mais en garantissant toujours une température maximale des gaz d'échappement à leur sortie d'environ 550°C. La seconde partie 3 en aluminium doit garantir la température de sortie des gaz d'échappement exigée par l'utilisateur qui, en fonction du moteur, peut être entre 150°C et 200°C, ou même moins.  The first part 2 made of stainless steel will be manufactured as small as possible but always guaranteeing a maximum temperature of the exhaust gas at its outlet of approximately 550 ° C. The second aluminum part 3 must guarantee the exhaust temperature required by the user which, depending on the engine, can be between 150 ° C and 200 ° C, or even less.
Compte tenu du fait que les échangeurs en aluminium sont plus efficaces que ceux en acier inoxydable, la taille totale de l'échangeur de chaleur 1 selon la présente invention est beaucoup plus compacte et courte, par comparaison avec la taille nécessaire si on utilisait un échangeur de chaleur unique en acier inoxydable pour obtenir le même rendement.  In view of the fact that the aluminum heat exchangers are more efficient than those of stainless steel, the total size of the heat exchanger 1 according to the present invention is much more compact and short, compared with the size required if an exchanger was used. of unique stainless steel heat to achieve the same performance.
Généralement, la première partie 2 est fabriquée comme un faisceau destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement autour ; quoique cela pourrait aussi être un collet ou bride de raccord (non représenté) .  Generally, the first part 2 is manufactured as a beam for the circulation of gases with heat exchange with a cooling fluid around; although this could also be a flange or fitting flange (not shown).
Dans ladite première partie 2 en acier inoxydable, on peut utiliser différentes technologies pour le faisceau de tubes, de sorte que lesdits tubes à gaz peuvent présenter une section circulaire ou peuvent aussi être aplatis avec une section ovale et présenter deux faces opposées plus larges et plus proches entre elles que les deux autres faces opposées. D'autre part, les tubes à gaz peuvent présenter des parois lisses ou bien ils peuvent comprendre des nervures ou ondulations afin d'améliorer le rendement thermique de l'échangeur de chaleur.  In said first part 2 of stainless steel, different technologies can be used for the bundle of tubes, so that said gas tubes may have a circular section or may also be flattened with an oval section and have two opposite faces larger and larger. close to each other than the other two opposite faces. On the other hand, the gas tubes may have smooth walls or they may include ribs or corrugations to improve the thermal efficiency of the heat exchanger.
La seconde partie 3 est fabriquée comme un second faisceau destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement autour. The second part 3 is made as a second beam for the circulation of gases with heat exchange with a cooling fluid around.
Dans ladite seconde partie 3 en aluminium, on peut utiliser différentes technologies pour refroidir les gaz, par exemple on peut utiliser un faisceau de tubes ou bien un ensemble de plaques empilées et des ailettes. De même, les tubes peuvent être extrudés, soudés à l'arc ou formés par pliage à partir d'une plaque puis soudés au four. En fonction de la technologie utilisée pour les tubes, on peut ou non inclure des ailettes à l'intérieur desdits tubes. En outre, le faisceau en aluminium peut être fabriqué d'une seule pièce par extrusion.  In said second aluminum part 3, different technologies can be used to cool the gases, for example a bundle of tubes or a set of stacked plates and fins can be used. Similarly, the tubes can be extruded, arc-welded or folded from a plate and then oven-welded. Depending on the technology used for the tubes, fins may or may not be included inside said tubes. In addition, the aluminum beam can be manufactured in one piece by extrusion.
L'utilisation de l'une ou l'autre de ces technologies peut dépendre de différents facteurs. Par exemple, on peut tenir compte de différents points :  The use of any of these technologies may depend on different factors. For example, we can consider different points:
- Les conditions posées par les constructeurs de véhicules concernant l'efficacité et la baisse de pression .  - The conditions imposed by vehicle manufacturers on efficiency and pressure drop.
- L'espace disponible dans le compartiment moteur pour faire entrer l'échangeur ainsi que la position de celui-ci dans ledit espace.  - The space available in the engine compartment to enter the exchanger and the position of the latter in said space.
- La technologie utilisée dans les deux faisceaux de l'échangeur pour la jonction des deux parties.  - The technology used in the two beams of the exchanger for joining the two parts.
De même, les deux parties 2 et 3 en forme de faisceau sont logées dans au moins un boîtier externe 4 et 5. De même que pour le faisceau de l'échangeur, on peut aussi fabriquer le boîtier de différentes manières en utilisant différents matériaux et/ou différents types de j onctions . Similarly, the two beam-shaped portions 2 and 3 are housed in at least one outer casing 4 and 5. As with the exchanger beam, the casing can also be made in different ways using different materials and / or different types of junctions.
Selon un premier mode de réalisation du boîtier, l'échangeur 1 comprend un premier boîtier 4 en acier inoxydable qui loge le premier faisceau 2 et un second boîtier 5 en aluminium qui loge le second faisceau 3. La jonction des deux boîtiers 4 et 5 peut se réaliser de différentes manières. According to a first embodiment of the housing, the heat exchanger 1 comprises a first stainless steel casing 4 which houses the first beam 2 and a second aluminum casing 5 which houses the second beam 3. The junction of the two housings 4 and 5 can be realized in different ways.
Une première option, représentée sur la Figure 1, consiste en ce que les deux boîtiers 4 et 5 sont unis au moyen d'un unique collet ou bride de raccord 6 faisant partie du premier boîtier 4 en acier inoxydable. Le second boîtier 5 en aluminium est susceptible d'être assemblé directement au collet unique 6 au moyen d'un soudage au four. Ce type de raccord est la meilleure solution.  A first option, shown in Figure 1, is that the two housings 4 and 5 are united by means of a single collar or connecting flange 6 forming part of the first housing 4 of stainless steel. The second aluminum housing 5 is capable of being assembled directly to the single collar 6 by means of an oven welding. This type of connection is the best solution.
Comme les températures de soudage au four de l'acier inoxydable et de l'aluminium sont complètement différentes, le premier boîtier 4 fabriqué en acier inoxydable doit être soudé au four en premier, ce qui fait que le collet commun 6 aussi est fabriqué en acier inoxydable pour garantir l'assemblage des composants. Ensuite, le boîtier 5 en aluminium est soudé au four au collet 6 solidaire du boîtier 4 en acier inoxydable.  Since the baking temperatures of stainless steel and aluminum are completely different, the first housing 4 made of stainless steel must be baked in the oven first, so that the common collar 6 is also made of steel. stainless to guarantee the assembly of the components. Then, the aluminum housing 5 is welded to the collar 6 integral with the housing 4 of stainless steel.
Il faut tenir compte de ce que les espaces nécessaires pour souder au four ces matériaux sont assez différents et la définition des jeux aussi est différente.  It must be taken into account that the spaces required for baking these materials are quite different and the definition of the games is also different.
Une seconde option, représentée sur la Figure 2, consiste en ce que les deux boîtiers 4 et 5 sont unis au moyen de deux collets ou brides de raccord 6 et 7 faisant chacun partie d'un boîtier 4 ou 5. Lesdits deux collets 6 et 7 centraux sont unis au moyen d'éléments de visserie 8, avec un joint d'étanchéité au milieu. Ce type de raccord est le plus simple.  A second option, shown in Figure 2, is that the two housings 4 and 5 are united by means of two collars or connecting flanges 6 and 7 each forming part of a housing 4 or 5. Said two collars 6 and 7 central are joined by means of hardware 8, with a seal in the middle. This type of connection is the simplest.
D'autre part, le circuit du fluide de refroidissement peut être le même pour les deux faisceaux 2 et 3, ou bien chaque faisceau 2 ou 3 peut avoir son propre circuit indépendant, comme on l'a représenté sur les Figures 1 et 2, où chaque circuit comprend ses tubes respectifs d'entrée 4a, 5a et de sortie 4b, 5b de fluide de refroidissement. Dans le cas où le circuit du fluide de refroidissement est commun aux deux faisceaux 2 et 3, ledit circuit doit être redéfini pour permettre le transport du fluide de refroidissement d'un boîtier 4 à l'autre 5. C'est pourquoi on peut adopter différentes solutions : On the other hand, the cooling fluid circuit may be the same for the two beams 2 and 3, or each beam 2 or 3 may have its own independent circuit, as shown in Figures 1 and 2, wherein each circuit comprises its respective inlet tubes 4a, 5a and 4b, 5b output of cooling fluid. In the case where the cooling fluid circuit is common to the two beams 2 and 3, said circuit must be redefined to allow the transport of the cooling fluid from one housing 4 to the other 5. This is why we can adopt different solutions :
Une première option, représentée sur la Figure 3, consiste en ce que l'échangeur 1 comprend un conduit externe 9 sensiblement semi-circulaire qui relie les deux boîtiers 4 et 5 pour le passage du fluide de refroidissement d'un boîtier 4 à l'autre 5. Ledit conduit 9 peut être en acier inoxydable ou en aluminium.  A first option, represented in FIG. 3, consists in that the exchanger 1 comprises an outermost substantially circular duct 9 which connects the two housings 4 and 5 for the passage of the cooling fluid from a casing 4 to the casing 4. other 5. Said duct 9 may be stainless steel or aluminum.
Une deuxième option, représentée sur la Figure 4, consiste en ce que l'échangeur 1 comprend une pièce 10 en forme de couvercle qui relie les deux boîtiers 4 et 5 pour le passage du fluide de refroidissement d'un boîtier 4 à l'autre 5, ladite pièce 10 pouvant être en acier inoxydable ou en aluminium.  A second option, shown in FIG. 4, consists in that the exchanger 1 comprises a piece 10 in the form of a cover which connects the two housings 4 and 5 for the passage of the cooling fluid from one casing 4 to the other 5, said part 10 may be stainless steel or aluminum.
Une troisième option, représentée sur la Figure 5, consiste en ce que l'échangeur 1 comprend deux pièces 10 et 11 assemblées en forme de couvercle qui relient les deux boîtiers 4 et 5 pour le passage du fluide de refroidissement d'un boîtier 4 à l'autre 5, la première pièce 10 étant en acier inoxydable et la seconde pièce 11 en aluminium. La première pièce 10 est monobloc avec le collet commun 6 en acier inoxydable situé entre les deux boîtiers 4 et 5 et la seconde pièce 11 est susceptible d'être raccordée au collet commun 6 pendant le processus de soudage au four du second boîtier 5.  A third option, represented in FIG. 5, consists in that the exchanger 1 comprises two parts 10 and 11 assembled in the form of a cover which connect the two housings 4 and 5 for the passage of the cooling fluid from a housing 4 to the other 5, the first piece 10 being made of stainless steel and the second piece 11 of aluminum. The first piece 10 is integral with the common collar 6 of stainless steel located between the two housings 4 and 5 and the second part 11 can be connected to the common collar 6 during the process of welding the second housing 5 in the oven.
Facultativement, on alimente les deux faisceaux 2 et 3 avec deux types de fluide de refroidissement différents, à la même température ou à une température différente : l'un avec un fluide de refroidissement à haute température (HT) et l'autre avec un fluide de refroidissement à basse température (LT) . Dans cette application on peut utiliser dans les deux boîtiers des tubes de raccordement du fluide de refroidissement de type standard . Optionally, the two beams 2 and 3 are fed with two different types of cooling fluid, at the same temperature or at a different temperature: one with a high temperature cooling fluid (HT) and the other with a fluid of low temperature cooling (LT). In this application can be used in both cases of the standard type of cooling fluid connection tubes.
Selon un second mode de réalisation, l'échangeur comprend un boîtier unique (non représenté) qui loge les deux faisceaux, premier 2 et second 3, le circuit de fluide de refroidissement étant commun.  According to a second embodiment, the exchanger comprises a single housing (not shown) which houses the two beams, first 2 and second 3, the cooling fluid circuit being common.
Ledit boîtier unique peut être fabriqué en un seul matériau qui recouvre les deux faisceaux de l'échangeur. Dans ce cas, le boîtier peut être fabriqué pas seulement en acier inoxydable ou aluminium, il peut aussi être fabriqué en plastique. Dans certains de ces cas et en fonction du type de fabrication, par exemple fonte d'aluminium ou injection de plastique, le boîtier peut intégrer différentes fonctions telles que des supports pour fixer l'échangeur à l'environnement moteur.  Said single housing can be made of a single material that covers the two beams of the exchanger. In this case, the housing can be made not only of stainless steel or aluminum, it can also be made of plastic. In some of these cases and depending on the type of manufacture, for example cast aluminum or plastic injection, the housing can integrate different functions such as supports for fixing the heat exchanger to the engine environment.
Pour simplifier le processus de fabrication du boîtier, celui-ci peut être divisé en deux ou plusieurs parties selon une division longitudinale ou transversale et ensuite être assemblé une fois que les deux faisceaux 2 et 3 ont été disposés à l'intérieur.  To simplify the manufacturing process of the housing, it can be divided into two or more parts in a longitudinal or transverse division and then be assembled once the two beams 2 and 3 have been arranged inside.
Ledit boîtier peut comprendre différentes formes pour fournir différentes fonctions telles que l'intégration des tubes d'entrée et de sortie du fluide de refroidissement. Lesdits tubes peuvent être dans les zones d'entrée et de sortie des gaz dans le boîtier ou au milieu entre les deux faisceaux. Une autre fonction du boîtier peut être de jouer le rôle de support du faisceau via les plaques de support.  Said housing may comprise different shapes to provide different functions such as integrating the inlet and outlet tubes of the cooling fluid. Said tubes may be in the gas inlet and outlet zones in the housing or in the middle between the two beams. Another function of the housing can be to play the role of supporting the beam via the support plates.
On peut augmenter la forme extérieure du boîtier longitudinalement ou seulement dans quelques zones pour l'adapter aux dimensions du faisceau correspondant ou pour fournir un support aux plaques de support. Les conceptions de l'échangeur EGR décrites ici peuvent être facilement appliquées dans des configurations en "I", c'est-à-dire dans lesquelles l'entrée et la sortie des gaz sont disposées à des extrémités opposées. The outer shape of the housing may be increased longitudinally or only in a few areas to accommodate the dimensions of the corresponding beam or to provide support for the support plates. The EGR exchanger designs described herein can be easily applied in "I" configurations, i.e., where the gas inlet and outlet are disposed at opposite ends.
On peut aussi utiliser les configurations en "U", c'est-à-dire dans lesquelles l'entrée et la sortie des gaz sont disposées l'une à côté de l'autre à une même extrémité ouverte, l'extrémité opposée étant fermée et délimitant un passage aller et un passage retour. Dans ce cas, il faut tenir compte de ce que l'entrée des gaz doit toujours être une partie en acier inoxydable et que ladite partie d'entrée en acier inoxydable doit être suffisamment longue pour refroidir les gaz jusqu'à une température acceptable pour l'aluminium, matériau de la seconde partie .  It is also possible to use "U" configurations, that is to say in which the inlet and the outlet of the gases are arranged next to one another at the same open end, the opposite end being closed and delimiting a go and a return passage. In this case, it must be taken into account that the gas inlet must always be a stainless steel part and that the said stainless steel inlet part must be long enough to cool the gases to a temperature acceptable for the first time. aluminum, material of the second part.

Claims

R E V E N D I C A T I O N S
1. Échangeur (1) de chaleur pour gaz, en particulier pour les gaz d'échappement d'un moteur, caractérisé en ce qu'il comprend une première partie (2), disposée à l'entrée des gaz, fabriquée dans un premier métal, et une seconde partie (3) , disposée à la suite de ladite première partie (2) le long du flux gazeux, fabriquée dans un second métal qui présente une température de fusion inférieure à celle de ladite première partie (2) et en ce que ladite première partie (2) est capable de réduire la température des gaz avant qu'ils ne passent par ladite seconde partie (3) . 1. heat exchanger (1) for gas, in particular for the exhaust gas of an engine, characterized in that it comprises a first portion (2), disposed at the gas inlet, manufactured in a first metal, and a second portion (3), disposed following said first portion (2) along the gas flow, made of a second metal which has a lower melting temperature than said first portion (2) and said first portion (2) is capable of reducing the temperature of the gases before they pass through said second portion (3).
2. Échangeur (1) selon la revendication 1, dans lequel la première partie (2) est en acier inoxydable et la seconde partie (3) est en aluminium. 2. Exchanger (1) according to claim 1, wherein the first part (2) is stainless steel and the second part (3) is aluminum.
3. Échangeur (1) selon la revendication 1 ou 2, dans lequel la première partie (2) comprend un collet ou bride de raccord. 3. Exchanger (1) according to claim 1 or 2, wherein the first part (2) comprises a collar or connecting flange.
4. Échangeur (1) selon la revendication 1 ou 2, dans lequel la première partie (2) est fabriquée comme un premier faisceau (2) destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement autour . 4. Exchanger (1) according to claim 1 or 2, wherein the first portion (2) is manufactured as a first beam (2) for the circulation of gases with heat exchange with a cooling fluid around.
5. Échangeur (1) selon la revendication 1 ou 2, dans lequel la seconde partie (3) est fabriquée comme un second faisceau (3) destiné à la circulation des gaz avec échange de chaleur avec un fluide de refroidissement autour. 5. Exchanger (1) according to claim 1 or 2, wherein the second part (3) is manufactured as a second beam (3) for the circulation of gases with heat exchange with a cooling fluid around.
6. Échangeur (1) selon la revendication 4 ou 5, dans lequel les deux parties (2, 3) en forme de faisceau sont logées dans au moins un boîtier (4, 5) . 6. Exchanger (1) according to claim 4 or 5, in wherein the two beam-shaped portions (2, 3) are accommodated in at least one housing (4, 5).
7. Échangeur (1) selon la revendication 6, dans lequel 1' échangeur comprend un premier boîtier (4) en acier inoxydable qui loge le premier faisceau (2) et un second boîtier (5) en aluminium qui loge le second faisceau (3) . 7. Exchanger (1) according to claim 6, wherein the exchanger comprises a first housing (4) stainless steel housing the first beam (2) and a second housing (5) aluminum housing the second beam (3). ).
8. Échangeur (1) selon la revendication 7, dans lequel les deux boîtiers (4, 5) sont unis au moyen d'un unique collet ou bride de raccord (6) faisant partie du premier boîtier (4) en acier inoxydable. 8. Exchanger (1) according to claim 7, wherein the two housings (4, 5) are united by means of a single collar or connecting flange (6) forming part of the first housing (4) of stainless steel.
9. Échangeur (1) selon la revendication 8, dans lequel le second boîtier (5) en aluminium est susceptible d'être assemblé directement au collet unique (6) au moyen d'un soudage au four. 9. Exchanger (1) according to claim 8, wherein the second housing (5) aluminum can be assembled directly to the single collar (6) by means of an oven welding.
10. Échangeur (1) selon la revendication 7, dans lequel les deux boîtiers (4, 5) sont unis au moyen de deux collets ou brides de raccord faisant chacun partie d'un boîtier (4, 5) . 10. Exchanger (1) according to claim 7, wherein the two housings (4, 5) are united by means of two collars or connecting flanges each forming part of a housing (4, 5).
11. Échangeur (1) selon la revendication 10, dans lequel lesdits deux collets (6, 7) sont unis au moyen d'éléments de visserie (8), avec un joint d'étanchéité au milieu . 11. Exchanger (1) according to claim 10, wherein said two collars (6, 7) are joined by means of fasteners (8), with a seal in the middle.
12. Échangeur (1) selon l'une quelconque des revendications 6 à 11, dans lequel chaque faisceau est associé à son propre circuit de fluide de refroidissement indépendant, chaque circuit comprenant ses tubes respectifs d'entrée et sortie de fluide de refroidissement . 12. Exchanger (1) according to any one of claims 6 to 11, wherein each bundle is associated with its own independent cooling fluid circuit, each circuit comprising its respective inlet and outlet tubes of cooling fluid.
13. Échangeur (1) selon l'une quelconque des revendications 6 à 11, dans lequel les deux faisceaux partagent le même circuit de fluide de refroidissement. 13. Exchanger (1) according to any one of claims 6 to 11, wherein the two beams share the same cooling fluid circuit.
14. Échangeur (1) selon la revendication 13, qui comprend un conduit externe (9) sensiblement semi- circulaire qui relie les deux boîtiers (4, 5) pour le passage du fluide de refroidissement d'un boîtier (4) à l'autre (5), ledit conduit (9) étant en acier inoxydable ou en aluminium. 14. Exchanger (1) according to claim 13, which comprises a substantially semicircular outer conduit (9) which connects the two housings (4, 5) for the passage of cooling fluid from a housing (4) to the another (5), said duct (9) being made of stainless steel or aluminum.
15. Échangeur (1) selon la revendication 13, qui comprend une pièce (10) en forme de couvercle qui relie les deux boîtiers (4, 5) pour le passage du fluide de refroidissement d'un boîtier (4) à l'autre (5), ladite pièce (10) pouvant être en acier inoxydable ou en aluminium . 15. Exchanger (1) according to claim 13, which comprises a piece (10) in the form of a cover which connects the two housings (4, 5) for the passage of cooling fluid from one housing (4) to the other (5), said piece (10) being made of stainless steel or aluminum.
16. Échangeur (1) selon la revendication 13, qui comprend deux pièces (10, 11) en forme de couvercle assemblées qui relient les deux boîtiers (4, 5) pour le passage du fluide de refroidissement d'un boîtier (4) à l'autre (5), la première pièce (10) étant en acier inoxydable et la seconde pièce (11) en aluminium. 16. Exchanger (1) according to claim 13, which comprises two parts (10, 11) in the form of assembled cover which connect the two housings (4, 5) for the passage of the cooling fluid from a housing (4) to the other (5), the first piece (10) being made of stainless steel and the second piece (11) of aluminum.
17. Échangeur (1) selon la revendication 16, dans lequel la première pièce (10) est monobloc avec le collet commun (6) en acier inoxydable situé entre les deux boîtiers (4, 5) et la seconde pièce (11) est susceptible d'être raccordée au collet commun (6) pendant le processus de soudage au four du second boîtier (5) . 17. Exchanger (1) according to claim 16, wherein the first piece (10) is integral with the common collar (6) of stainless steel located between the two housings (4, 5) and the second piece (11) is susceptible to be connected to the common collar (6) during the oven welding process of the second housing (5).
18. Échangeur (1) selon la revendication 6, dans lequel l'échangeur comprend un boîtier unique qui loge les deux faisceaux, premier (2) et second (3), le circuit de fluide de refroidissement étant commun. 18. Exchanger (1) according to claim 6, wherein the exchanger comprises a single housing which houses the two beams, first (2) and second (3), the cooling fluid circuit being common.
EP10752582A 2009-09-14 2010-09-13 Gas heat exchanger, in particular for the exhaust gases of an engine Withdrawn EP2478205A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200930689A ES2388156B1 (en) 2009-09-14 2009-09-14 HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE.
PCT/EP2010/063408 WO2011029940A1 (en) 2009-09-14 2010-09-13 Gas heat exchanger, in particular for the exhaust gases of an engine

Publications (1)

Publication Number Publication Date
EP2478205A1 true EP2478205A1 (en) 2012-07-25

Family

ID=43221901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10752582A Withdrawn EP2478205A1 (en) 2009-09-14 2010-09-13 Gas heat exchanger, in particular for the exhaust gases of an engine

Country Status (5)

Country Link
EP (1) EP2478205A1 (en)
KR (1) KR101733617B1 (en)
ES (1) ES2388156B1 (en)
IN (1) IN2012DN02049A (en)
WO (1) WO2011029940A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017050429A1 (en) * 2015-09-23 2017-03-30 Linde Aktiengesellschaft Use of different materials in multi-part heat exchangers
US10815931B2 (en) 2017-12-14 2020-10-27 Cummins Inc. Waste heat recovery system with low temperature heat exchanger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030070793A1 (en) * 2001-10-15 2003-04-17 Dierbeck Robert F. Heat exchanger assembly with dissimilar metal connection capability
SE527869C2 (en) * 2004-11-17 2006-06-27 Scania Cv Ab Cooling device in a vehicle
DE102005029322A1 (en) * 2005-06-24 2006-12-28 Behr Gmbh & Co. Kg Exhaust gas recycling and cooling device for engine has first and second exhaust gas heat exchangers combined in structural unit to form module
KR100774347B1 (en) * 2006-11-08 2007-11-07 현대자동차주식회사 Apparatus for cooling exhaust gas
KR100999607B1 (en) * 2007-06-05 2010-12-08 기아자동차주식회사 Cooling apparatus and method of exhaust gas recirculation gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011029940A1 *

Also Published As

Publication number Publication date
IN2012DN02049A (en) 2015-08-21
KR20120065414A (en) 2012-06-20
KR101733617B1 (en) 2017-05-10
ES2388156B1 (en) 2013-09-06
WO2011029940A1 (en) 2011-03-17
ES2388156A1 (en) 2012-10-09

Similar Documents

Publication Publication Date Title
EP2137477B1 (en) Heat exchanger for gas
FR2830929A1 (en) EXHAUST GAS EXCHANGER
EP2972049B1 (en) Heat exchanger, in particular a supercharging air cooler
FR2933176A1 (en) HEAT EXCHANGER HAVING A HEAT EXCHANGE BEAM AND A HOUSING
EP2622200B1 (en) Device for mixing a stream of inlet gases and of recirculated exhaust gases comprising insulating means for the recirculated exhaust gases
EP2817503B2 (en) Heat exchanger for gases, in particular for the exhaust gases of an engine
EP2912396B1 (en) Heat exchanger, particularly for a motor vehicle
FR2908832A1 (en) CARTER FOR HEAT EXCHANGER
EP2502016A2 (en) Heat exchanger for gases, in particular for the exhaust gases of an engine
EP3132220A1 (en) Heat exchanger for a motor vehicle
WO2003102396A1 (en) Heat exchange module for enclosing a motor vehicle engine
FR2914413A1 (en) ALUMINUM MODULAR COOLER
FR2795811A1 (en) HEAT EXCHANGE DEVICE FOR EXHAUST GAS
WO2011029940A1 (en) Gas heat exchanger, in particular for the exhaust gases of an engine
FR2935475A1 (en) Heat exchanger i.e. cooler, for cooling re-circulated exhaust gas, in cooling circuit of heat engine of motor vehicle, has fluid inlets for inletting fractions of coolant, and fluid outlet for evacuating fractions of coolant at same time
EP2469067B1 (en) Casing for intake module, in particular for the intake module of an automobile combustion engine, and intake module including such a casing
EP1983171A1 (en) Heat exchanger for an automobile
FR2855602A1 (en) PLATE HEAT EXCHANGER, IN PARTICULAR COOLER FOR RECIRCULATED EXHAUST GASES
WO2014082931A1 (en) Gas heat exchanger, in particular for exhaust gases of an engine
EP2901097B1 (en) Heat exchanger, in particular for motor vehicle, and associated assembly method
EP3308094A1 (en) Heat exchanger for gas, particularly for the exhaust gases of an engine
FR3030709A1 (en) HEAT EXCHANGER
FR2969716A1 (en) CARTRIDGE FOR AN INTAKE MODULE, IN PARTICULAR FOR A MOTOR VEHICLE THERMAL MOTOR INTAKE MODULE, AND ADMISSION MODULE COMPRISING SUCH A CARTER
EP3504480B1 (en) Modular turbine with heat exchanger for producing electrical energy
FR2915274A1 (en) Heat exchanger i.e. charge air cooler, for heat engine of motor vehicle, has branch for short-circuiting heat exchange bundle which is housed inside casing, and outlets of branch and bundle extending along same direction

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: 20120227

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20130131

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20130611