WO2007031637A1 - Heat exchange module for controlling temperature of intake gases in a two-bank internal combustion engine for a motor vehicle - Google Patents

Heat exchange module for controlling temperature of intake gases in a two-bank internal combustion engine for a motor vehicle Download PDF

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Publication number
WO2007031637A1
WO2007031637A1 PCT/FR2006/002085 FR2006002085W WO2007031637A1 WO 2007031637 A1 WO2007031637 A1 WO 2007031637A1 FR 2006002085 W FR2006002085 W FR 2006002085W WO 2007031637 A1 WO2007031637 A1 WO 2007031637A1
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WO
WIPO (PCT)
Prior art keywords
heat exchange
exchange module
module according
recirculated
charge air
Prior art date
Application number
PCT/FR2006/002085
Other languages
French (fr)
Inventor
Michel Potier
Jean Lathiere
Bertrand Gessier
Original Assignee
Valeo Systemes Thermiques
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Publication date
Application filed by Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2007031637A1 publication Critical patent/WO2007031637A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10091Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10111Substantially V-, C- or U-shaped ducts in direction of the flow path
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04Cooling of air intake supply
    • F02B29/0406Layout of the intake air cooling or coolant circuit
    • F02B29/0412Multiple heat exchangers arranged in parallel or in series
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04Cooling of air intake supply
    • F02B29/045Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0475Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23Layout, e.g. schematics
    • F02M26/24Layout, e.g. schematics with two or more coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32Liquid-cooled heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10006Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026Plenum chambers
    • F02M35/10052Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10242Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268Heating, cooling or thermal insulating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10242Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10288Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/104Intake manifolds
    • F02M35/116Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Definitions

  • Heat exchange module for regulating the temperature of gases admitted to a V-cylinder vehicle heat engine
  • the invention relates to heat exchangers for cooling or heating the gases admitted to the combustion chambers of a motor vehicle engine.
  • Turbo-compressed engines in particular diesel or gasoline engines, are powered by pressurized air called charge air from a turbo-compressor powered by the engine exhaust gas.
  • a cooler called a charge air cooler or, more generally, a supply air cooler.
  • a heat exchange module for temperature regulation in a thermal engine with two banks of V cylinders, comprising at least one inlet chamber.
  • the at least one inlet chamber is formed in the form of at least one duct adapted to be housed between the banks of cylinders.
  • the module comprises at least one heat exchanger, and an outlet chamber which is formed in the form of a duct substantially parallel to and / or to the ducts of the chambers. entrance.
  • Such a heat exchange module placed between the banks of cylinders, saves an extremely important place that can then be dedicated to security elements, aesthetic design, or to integrate other functional components in the engine compartment.
  • the module includes an inlet chamber for charge air and an inlet chamber for recirculated gases.
  • the inlet chambers are made in the form of two adjacent substantially parallel ducts adapted to be housed between the banks of cylinders.
  • the module comprises respectively a charge air cooler and a gas cooler. recirculated, and a common outlet chamber to which the chillers are connected.
  • the outlet chamber is in the form of a duct substantially parallel to the ducts of the chambers inlet, and the outlet chambers are each provided to supply the cylinders of a respective engine bench with a mixture of supercharged air and recirculated gas.
  • the cooling path of the charge air and the recirculated gases is substantially transverse to a longitudinal direction of said conduits.
  • the inlet chamber for the charge air and the inlet chamber for the recirculated gases are made with a single conduit having a partition separating the two chambers.
  • the charge air cooler and the recirculated gas cooler are embodied as a heat exchange bundle separated into two zones by a partition.
  • the charge air cooler and the recirculated gas cooler are constructed as two separate heat exchange bundles.
  • the heat module may comprise means for adjusting the charge air flow, as well as supercharging air distribution means, and two bypass bypass connections ; connecting the supercharging air distribution means to the outlet chambers.
  • the supercharging air distribution means may comprise two distribution valves, each connected by one of said bypass bypass to an outlet chamber.
  • the supercharging air flow adjustment means and the means for Charge air distribution are realized in the form of a single valve.
  • the module may comprise recirculated gas flow control means, as well as recirculated gas distribution means, and two bypass bypass connecting the recirculated gas distribution means to the outlet chambers.
  • the recirculated gas distribution means may comprise two distribution valves, each connected by one of said bypass bypass to an outlet chamber.
  • the recirculated gas flow control means and the recirculated gas distribution means are made in the form of a single valve.
  • the module may also include a heating resistor disposed in each output chamber, which allows better control of the engine start cycle.
  • the invention also relates to a thermal engine with two banks of V cylinders, which comprises a heat exchange module as described above housed between the banks of cylinders, the outlet chambers each supplying the cylinders of a respective bank by a mixture of supercharged air and recirculated gas.
  • FIG. 1 shows a partially cutaway perspective view of a V-cylinder engine with a heat exchange module according to the invention
  • FIG. 2 shows a substantially front and partially cutaway perspective view of a variant of FIG. 1;
  • FIG. 3 shows a schematic view of another variant of the invention.
  • FIG. 1 is a partially broken away perspective view of a heat engine 2 with two banks 4 of V-shaped cylinders 6.
  • V it is meant that the banks 4 extend in a longitudinal direction of the engine and form an angle with each other, giving a general V shape for the engine. It may be, for example, a type V6 or V8 engine.
  • a heat exchange module 8 is housed between the branches of the V, that is to say between the banks 4.
  • This heat exchange module 8 comprises an inlet chamber for the supercharging air 10, an inlet chamber for recirculated gases 12, two pairs of coolers 14 and 16 on either side of inlet chambers 10 and 12, and two outlet chambers 18 between each pair of coolers and the walls of each bench 4.
  • the inlet chamber 10 for the supercharging air is here produced in the form of a duct which extends along the longitudinal direction of the engine 2, substantially centered on the middle of the branches of the V, this is say substantially parallel to the axis of rotation (not shown) of the engine 2.
  • This duct is defined longitudinally by an upper wall 20 and a lower wall 22, and laterally on each side by the respective faces of the coolers 14.
  • the wall 20 is a trapezoidal section section with its large base removed.
  • the wall 22 is a flat plate parallel to the portion of the wall 20 corresponding to the small base of its section.
  • the inlet chamber for recirculated gases 12 is in the form of a duct parallel to and adjacent to that which forms the inlet chamber for charge air 10.
  • This duct is defined longitudinally by the wall 22 and a wall 24 which is parallel to the wall 22, and laterally on each side by the respective faces of the coolers 16.
  • a wall 26 separates the inlet chamber 12 for recirculated gases in two chambers respectively 12a and 12b.
  • the wall 22 thus plays a role of partition.
  • this partition makes it possible to define two adjacent and parallel ducts extending in the longitudinal direction to form the inlet chambers 10 and 12.
  • the coolers 14 and 16 are in the example described here made in the form of a single heat exchange beam 28, separated in two by a partition 30 at the level of the partition 22.
  • the beam 28 may be made conventionally by stacking plates or fins or other ways known to those skilled in the art.
  • Partition 30 allows define two separate paths for the cooling fluids passing through the cooler 14 on the one hand and the cooler 16 on the other hand, in order to separately cool the charge air coming from the inlet chamber for charge air 10 on the one hand, and the recirculated gases from the inlet chamber for recirculated gases 12 on the other hand.
  • the outlet chamber 18 is in the form of a duct which extends along the banks 4 in the longitudinal direction. This duct is delimited longitudinally by an extension 32 of the wall 20 and an extension 34 of the wall 24 and laterally by the faces of the coolers 14 and 16 on the one hand and the inlet manifold walls 36 for the cylinders 6 of somewhere else.
  • the tubes 36 allow the admission of a mixture made in each outlet chamber 18 of charge air and cooled recirculated gas.
  • charge air is delivered through a valve 38 to the inlet chamber 10 for charge air.
  • the valve 38 is adapted to regulate the charge air flow through the module 8 and to control the outlet temperature of this charge air. For this, a portion of this air is directly deflected in the outlet chambers 18 via bypass bypass which do not appear in this figure.
  • valve 38 A valve similar to valve 38 is present for the recirculated gases, and operates with similar bypass bypasses, but this valve and these taps do not appear in the drawings.
  • FIG. 2 shows an engine comprising another embodiment of the heat module according to the invention according to a still partially cutaway view, but this time substantially along the longitudinal axis of the engine 2.
  • the wall 26 has been removed and the coolers 14 and 16 are here made in the form of contiguous separate beams.
  • electrical heating resistors 40 have been added to each outlet chamber 18.
  • they may be positive temperature coefficient resistors (so-called PTC resistors).
  • PTC resistors positive temperature coefficient resistors
  • Figure 3 shows a substantially front schematic view of an alternative embodiment.
  • valve 38 is made in the form of a valve 44 for controlling the flow rate. of charge air, connected to two valves 46 of charge air distribution.
  • Each valve 46 is connected on the one hand to the inlet chamber 10 for charge air, and to an outlet chamber 18 by a bypass bypass 48.

Abstract

The invention relates to a heat exchange module for controlling a temperature in a two bank internal combustion engine comprising at least one input chamber (10). The input chamber(s) (10, 12) are embodied in the form of at least one duct placeable between two cylinder (6) banks (4). On both sides of the input chamber (10), the module (8) comprises at least one heat exchanger and an output chamber (18) embodied in the form of a duct substantially parallel to the duct(s) of the input chamber (10, 12). A two-bank internal combustion engine provided with said heat exchange module is also disclosed. Said invention can be used for motor vehicles.

Description

Module d'échange de chaleur pour la régulation de la température des gaz admis dans un moteur thermigue de véhicule à bancs de cylindres en VHeat exchange module for regulating the temperature of gases admitted to a V-cylinder vehicle heat engine
L'invention se rapporte aux échangeurs de chaleur pour refroidir ou réchauffer les gaz admis dans les chambres de combustion d'un moteur thermique de véhicule automobile.The invention relates to heat exchangers for cooling or heating the gases admitted to the combustion chambers of a motor vehicle engine.
Les moteurs thermiques turbo-compressés, en particulier les moteurs diesel ou à essence, sont alimentés par un air sous pression appelé air de suralimentation, provenant d'un turbo-compresseur alimenté par les gaz d'échappement du moteur.Turbo-compressed engines, in particular diesel or gasoline engines, are powered by pressurized air called charge air from a turbo-compressor powered by the engine exhaust gas.
Il est nécessaire de refroidir cet air avant son admission dans le moteur. On utilise pour cela, de manière classique, un refroidisseur appelé refroidisseur d'air de suralimenta- tion ou plus généralement refroidisseur d'air d' alimentation .It is necessary to cool this air before admission to the engine. For this purpose, it is customary to use a cooler called a charge air cooler or, more generally, a supply air cooler.
Par ailleurs, il est connu de recirculer une partie des gaz d'échappement vers l'admission du moteur pour qu'ils soient plus complètement brûlés. Mais, comme ces gaz sont à température maximale très éïevée (4000C à 9000C), il est connu de les refroidir en les faisant circuler dans un autre échangeur alimenté par un liquide de refroidissement. Il existe diverses architectures pour de tels modules d'échange de chaleur, mais elles occupent généralement beaucoup d'espace, ce qui gêne la conception du véhicule.Furthermore, it is known to recirculate a portion of the exhaust gas to the intake of the engine so that they are more completely burned. But as these gases are very éïevée maximum temperature (400 0 C to 900 0 C), it is known to cool running them in another exchanger fed with a cooling liquid. There are various architectures for such heat exchange modules, but they generally occupy a lot of space, which hinders the design of the vehicle.
Ce problème se pose en particulier pour les moteurs thermiques à bancs de cylindres en V du fait de leur encombrement important, notamment dans une direction transversale à l'axe des bancs de cylindres, c'est à dire l'axe de rotation du moteur . L'invention vise à améliorer la situation.This problem arises in particular for thermal engines with V-cylinder banks because of their large size, especially in a direction transverse to the axis of the banks of cylinders, ie the axis of rotation of the engine. The invention aims to improve the situation.
A cet effet, elle propose un module d'échange de chaleur pour la régulation en température dans un moteur thermique à deux bancs de cylindres en V, comprenant au moins une chambre d'entrée. La ou les chambres d'entrée sont réalisées sous la forme d'au moins un conduit propre à être logé entre les bancs de cylindres. De part et d'autre de la chambre d'entrée, le module comporte au moins un échangeur de chaleur, ainsi qu'une chambre de sortie qui est réalisée sous la forme d'un conduit sensiblement parallèle au et/ou aux conduits des chambres d ' entrée .For this purpose, it proposes a heat exchange module for temperature regulation in a thermal engine with two banks of V cylinders, comprising at least one inlet chamber. The at least one inlet chamber is formed in the form of at least one duct adapted to be housed between the banks of cylinders. On both sides of the inlet chamber, the module comprises at least one heat exchanger, and an outlet chamber which is formed in the form of a duct substantially parallel to and / or to the ducts of the chambers. entrance.
Un tel module d'échange de chaleur, placé entre les bancs de cylindres , permet d ' économiser une place extrêmement importante qui peut alors être dédiée à des éléments de sécurité, de conception esthétique, ou encore pour intégrer d'autres composants fonctionnels dans le compartiment moteur.Such a heat exchange module, placed between the banks of cylinders, saves an extremely important place that can then be dedicated to security elements, aesthetic design, or to integrate other functional components in the engine compartment.
Dans un mode de réalisation, le module comprend une chambre d'entrée pour de l'air de suralimentation et une chambre d ' entrée pour des gaz recirculés . Les chambres d ' entrée sont réalisées sous la forme de deux conduits sensiblement parallèles adjacents propres à être logés entre les bancs de cylindres. En outre, de part et d'autre de la chambre d'entrée pour de l'air de suralimentation et de la chambre d'entrée pour des gaz recirculés, le module comporte respectivement un refroidisseur d'air de suralimentation et un refroidisseur de gaz recirculés, ainsi qu'une chambre de sortie commune à laquelle sont reliés les refroidisseurs . La chambre de sortie est réalisée sous la forme d'un conduit sensiblement parallèle aux conduits des chambres d'entrée, et les chambres de sortie sont prévues chacune pour alimenter les cylindres d'un banc respectif du moteur par un mélange d'air suralimenté et de gaz recirculés.In one embodiment, the module includes an inlet chamber for charge air and an inlet chamber for recirculated gases. The inlet chambers are made in the form of two adjacent substantially parallel ducts adapted to be housed between the banks of cylinders. In addition, on both sides of the inlet chamber for charge air and the inlet chamber for recirculated gases, the module comprises respectively a charge air cooler and a gas cooler. recirculated, and a common outlet chamber to which the chillers are connected. The outlet chamber is in the form of a duct substantially parallel to the ducts of the chambers inlet, and the outlet chambers are each provided to supply the cylinders of a respective engine bench with a mixture of supercharged air and recirculated gas.
Avantageusement, le parcours de refroidissement de l'air de suralimentation et des gaz recirculés est sensiblement transverse à, une direction longitudinale desdits conduits .Advantageously, the cooling path of the charge air and the recirculated gases is substantially transverse to a longitudinal direction of said conduits.
Dans un mode de réalisation, la chambre d'entrée pour l'air de suralimentation et la chambre d'entrée pour les gaz recirculés sont réalisées avec un seul conduit comportant une cloison séparant les deux chambres .In one embodiment, the inlet chamber for the charge air and the inlet chamber for the recirculated gases are made with a single conduit having a partition separating the two chambers.
Dans un autre mode de réalisation le refroidisseur d'air de suralimentation et le refroidisseur de gaz recirculés sont réalisés sous la forme d'un faisceau d'échange de chaleur séparé en deux zones par une cloison.In another embodiment, the charge air cooler and the recirculated gas cooler are embodied as a heat exchange bundle separated into two zones by a partition.
Ces modes de réalisation permettent de réaliser un module d'échange de chaleur compact et peu onéreux.These embodiments make it possible to produce a compact and inexpensive heat exchange module.
Dans un mode de réalisation en variante, le refroidisseur d'air de suralimentation et le refroidisseur de gaz recirculés sont réalisés sous la forme de deux faisceaux d'échange de chaleur distincts.In an alternative embodiment, the charge air cooler and the recirculated gas cooler are constructed as two separate heat exchange bundles.
Le module de chaleur peut comporter des moyens de réglage de débit d'air de suralimentation, ainsi que des moyens de répartition d'air de suralimentation, et deux dérivations de contournement; reliant les moyens de répartition d'air de suralimentation aux chambres de sortie.The heat module may comprise means for adjusting the charge air flow, as well as supercharging air distribution means, and two bypass bypass connections ; connecting the supercharging air distribution means to the outlet chambers.
Les moyens de répartition d'air de suralimentation peuvent comporter deux vannes de répartition, chacune reliée par une desdites dérivation de contournement à une chambre de sortie. Dans un mode de réalisation, les moyens de réglage de débit d'air de suralimentation et les moyens de répartition d'air de suralimentation sont réalisés sous la forme d'une seule vanne.The supercharging air distribution means may comprise two distribution valves, each connected by one of said bypass bypass to an outlet chamber. In one embodiment, the supercharging air flow adjustment means and the means for Charge air distribution are realized in the form of a single valve.
Le module peut comporter des moyens de réglage de débit de gaz recirculés, ainsi que des moyens de répartition de gaz recirculés, et deux dérivations de contournement reliant les moyens de répartition de gaz recirculés aux chambres de sortie.The module may comprise recirculated gas flow control means, as well as recirculated gas distribution means, and two bypass bypass connecting the recirculated gas distribution means to the outlet chambers.
Les moyens de répartition de gaz recirculés peuvent comporter deux vannes de répartition, chacune reliée par une desdites dérivation de contournement à une chambre de sortie. Dans un mode de réalisation, les moyens de réglage de débit de gaz recirculés et les moyens de répartition de gaz recirculés sont réalisés sous la forme d'une seule vanne .The recirculated gas distribution means may comprise two distribution valves, each connected by one of said bypass bypass to an outlet chamber. In one embodiment, the recirculated gas flow control means and the recirculated gas distribution means are made in the form of a single valve.
Ces modes de réalisation permettent de contrôler avec précision le débit d'air de suralimentation et sa température en sortie du module d'échange de chaleur.These embodiments make it possible to precisely control the supercharging air flow rate and its outlet temperature of the heat exchange module.
Le module peut également comporter une résistance de chauffage disposée dans chaque chambre de sortie, ce qui permet de mieux maîtriser le cycle de démarrage du moteur.The module may also include a heating resistor disposed in each output chamber, which allows better control of the engine start cycle.
L'invention concerne également un moteur thermique à deux bancs de cylindres en V, qui comporte un module d'échange de chaleur tel que décrit plus haut logé entre les bancs de cylindres, les chambres de sortie alimentant chacune les cylindres d'un banc respectif par un mélange d'air suralimenté et de gaz recirculés .The invention also relates to a thermal engine with two banks of V cylinders, which comprises a heat exchange module as described above housed between the banks of cylinders, the outlet chambers each supplying the cylinders of a respective bank by a mixture of supercharged air and recirculated gas.
D'autres avantages et caractéristiques de l'invention apparaîtront mieux à la lecture de la description d'exemples donnés à titre illustratif et non limitatif, tirés des dessins sur lesquels : - la figure 1 montre une vue en perspective partiellement arrachée d'un moteur thermique à bancs de cylindres en V comprenant un module d'échange de chaleur selon 1 ' invention ;Other advantages and characteristics of the invention will appear better on reading the description of examples given for illustrative and non-limiting purposes, taken from the drawings in which: FIG. 1 shows a partially cutaway perspective view of a V-cylinder engine with a heat exchange module according to the invention;
- la figure 2 montre une vue sensiblement de face et en perspective partiellement arrachée d'une variante de la figure 1 ; etFIG. 2 shows a substantially front and partially cutaway perspective view of a variant of FIG. 1; and
- la figure 3 montre une vue schématique d'une autre variante de l'invention.- Figure 3 shows a schematic view of another variant of the invention.
La figure 1 est une vue en perspective partiellement arrachée d'un moteur thermique 2 à deux bancs 4 de cylindres 6 en V. Par "V", on entend le fait que les bancs 4 s'étendent selon une direction longitudinale du moteur et forment un angle l'un avec l'autre, ce qui donne une forme générale en V pour le moteur. Il peut s'agir, par exemple, d 'un moteur du type V6 ou V8.FIG. 1 is a partially broken away perspective view of a heat engine 2 with two banks 4 of V-shaped cylinders 6. By "V", it is meant that the banks 4 extend in a longitudinal direction of the engine and form an angle with each other, giving a general V shape for the engine. It may be, for example, a type V6 or V8 engine.
Un module d'échange de chaleur 8 selon l'invention est logé entre les branches du V, c'est-à-dire entre les bancs 4. Ce module d'échange de chaleur 8 comporte une chambre d'entrée pour de l'air de suralimentation 10, une chambre d'entrée pour des gaz recirculés 12, deux paires de refroidisseurs 14 et 16 de part et d'autre des chambres d'entrée 10 et 12, et deux chambres de sortie 18 entre chaque paire de refroidisseurs et les parois de chaque banc 4.A heat exchange module 8 according to the invention is housed between the branches of the V, that is to say between the banks 4. This heat exchange module 8 comprises an inlet chamber for the supercharging air 10, an inlet chamber for recirculated gases 12, two pairs of coolers 14 and 16 on either side of inlet chambers 10 and 12, and two outlet chambers 18 between each pair of coolers and the walls of each bench 4.
La chambre d'entrée 10 pour l'air de suralimentation est ici réalisée sous la forme d'un conduit qui s'étend le long de la direction longitudinale du moteur 2, sensiblement centré sur le milieu des branches du V, c'est à dire sensiblement parallèle à l'axe de rotation (non représenté) du moteur 2. Ce conduit est défini longitudinalement par une paroi supérieure 20 et une paroi inférieure 22, et latéralement de chaque côté par les faces respectives des refroidisseurs 14.The inlet chamber 10 for the supercharging air is here produced in the form of a duct which extends along the longitudinal direction of the engine 2, substantially centered on the middle of the branches of the V, this is say substantially parallel to the axis of rotation (not shown) of the engine 2. This duct is defined longitudinally by an upper wall 20 and a lower wall 22, and laterally on each side by the respective faces of the coolers 14.
La paroi 20 est un profilé de section trapézoïdale auquel on a retiré sa grande base. La paroi 22 est une plaque plane parallèle à la partie de la paroi 20 correspondant à la petite base de sa section.The wall 20 is a trapezoidal section section with its large base removed. The wall 22 is a flat plate parallel to the portion of the wall 20 corresponding to the small base of its section.
Dans le mode de réalisation décrit, la chambre d'entrée pour des gaz recirculés 12 est réalisée sous la forme d'un conduit parallèle et adjacent à celui qui forme la chambre d'entrée pour de l'air de suralimentation 10.In the embodiment described, the inlet chamber for recirculated gases 12 is in the form of a duct parallel to and adjacent to that which forms the inlet chamber for charge air 10.
Ce conduit est défini longitudinalement par la paroi 22 et une paroi 24 qui est parallèle à la paroi 22, et latéralement de chaque côté par les faces respectives des refroidisseurs 16. Dans l'exemple ici décrit, une paroi 26 sépare la chambre d'entrée 12 pour les gaz recirculés en deux chambres respectivement 12a et 12b.This duct is defined longitudinally by the wall 22 and a wall 24 which is parallel to the wall 22, and laterally on each side by the respective faces of the coolers 16. In the example described here, a wall 26 separates the inlet chamber 12 for recirculated gases in two chambers respectively 12a and 12b.
Dans l'exemple décrit, la paroi 22 joue ainsi un rôle de cloison. En effet, dans un conduit défini par la paroi 20, la paroi 24 et les parois latérales des refroidisseurs 14 et 16, cette cloison permet de définir deux conduits adjacents et parallèles s 'étendant selon la direction longitudinale pour former les chambres d'entrée 10 et 12.In the example described, the wall 22 thus plays a role of partition. In fact, in a duct defined by the wall 20, the wall 24 and the side walls of the coolers 14 and 16, this partition makes it possible to define two adjacent and parallel ducts extending in the longitudinal direction to form the inlet chambers 10 and 12.
Les refroidisseurs 14 et 16 sont dans l'exemple ici décrit réalisés sous la forme d'un faisceau d'échange de chaleur 28 unique, séparé en deux par une cloison 30 au niveau de la cloison 22.The coolers 14 and 16 are in the example described here made in the form of a single heat exchange beam 28, separated in two by a partition 30 at the level of the partition 22.
Le faisceau 28 peut être réalisé de manière classique par empilement de plaques ou d'ailettes ou d'autres manières connues de l'homme du métier. La cloison 30 permet de définir deux parcours séparés pour les fluides de refroidissement traversant le refroidisseur 14 d'une part et le refroidisseur 16 d'autre part, afin de refroidir séparément l'air de suralimentation issu de la chambre d'entrée pour de l'air de suralimentation 10 d'une part, et les gaz recirculés issus de la chambre d'entrée pour des gaz recirculés 12 d'autre part.The beam 28 may be made conventionally by stacking plates or fins or other ways known to those skilled in the art. Partition 30 allows define two separate paths for the cooling fluids passing through the cooler 14 on the one hand and the cooler 16 on the other hand, in order to separately cool the charge air coming from the inlet chamber for charge air 10 on the one hand, and the recirculated gases from the inlet chamber for recirculated gases 12 on the other hand.
La chambre de sortie 18 est réalisée sous la forme d'un conduit qui s'étend le long des bancs 4 selon la direction longitudinale . Ce conduit est délimité longitudinalement par un prolongement 32 de la paroi 20 et un prolongement 34 de la paroi 24 et latéralement par les faces des refroidisseurs 14 et 16 d'une part et des parois de tubulures 36 d'admission pour les cylindres 6 d'autre part. Les tubulures 36 permettent l'admission d'un mélange réalisé dans chaque chambre de sortie 18 d'air de suralimentation et de gaz recirculés refroidis .The outlet chamber 18 is in the form of a duct which extends along the banks 4 in the longitudinal direction. This duct is delimited longitudinally by an extension 32 of the wall 20 and an extension 34 of the wall 24 and laterally by the faces of the coolers 14 and 16 on the one hand and the inlet manifold walls 36 for the cylinders 6 of somewhere else. The tubes 36 allow the admission of a mixture made in each outlet chamber 18 of charge air and cooled recirculated gas.
Lorsque le moteur 2 fonctionne, de l'air de suralimentation est distribué par une vanne 38 à la chambre d'entrée 10 pour de l'air de suralimentation.When the engine 2 is running, charge air is delivered through a valve 38 to the inlet chamber 10 for charge air.
La vanne 38 est propre à réguler le débit d'air de suralimentation traversant le module 8 et à contrôler la température de sortie de cet air de suralimentation. Pour cela, une partie de cet air est directement déviée dans lés chambres de sortie 18 via des dérivations de contournement qui n'apparaissent pas sur cette figure.The valve 38 is adapted to regulate the charge air flow through the module 8 and to control the outlet temperature of this charge air. For this, a portion of this air is directly deflected in the outlet chambers 18 via bypass bypass which do not appear in this figure.
Une vanne similaire à la vanne 38 est présente pour les gaz recirculés, et fonctionne avec des dérivations de contournement similaires, mais cette vanne et ces dérivations n'apparaissent pas sur les dessins.A valve similar to valve 38 is present for the recirculated gases, and operates with similar bypass bypasses, but this valve and these taps do not appear in the drawings.
On a représenté sur la figure 2 un moteur comportant une autre forme de réalisation du module de chaleur selon l'invention selon une vue toujours en perspective partiellement arrachée mais cette fois sensiblement selon l'axe longitudinal du moteur 2.FIG. 2 shows an engine comprising another embodiment of the heat module according to the invention according to a still partially cutaway view, but this time substantially along the longitudinal axis of the engine 2.
Dans cette variante, la paroi 26 a été retirée et les refroidisseurs 14 et 16 sont ici réalisés sous la forme de faisceaux distincts contigus .In this variant, the wall 26 has been removed and the coolers 14 and 16 are here made in the form of contiguous separate beams.
En outre, des résistances électriques de chauffage 40 ont été rajoutées dans chaque chambre de sortie 18. Il peut s'agir en particulier de résistances à coefficient de température positif (dites résistances CTP). 'Les résistances 40 sont utilisées lors du démarrage du véhicule, lorsque l'air de suralimentation et/ou les gaz recirculés ne sont pa≤ assez chauds. Ils sont alors entièrement dérivés directement dans la chambre de sortieIn addition, electrical heating resistors 40 have been added to each outlet chamber 18. In particular, they may be positive temperature coefficient resistors (so-called PTC resistors). The resistors 40 are used when the vehicle is started, when the charge air and / or the recirculated gases are not sufficiently hot. They are then entirely derived directly into the exit chamber
18 pour y être réchauffés.18 to be warmed up.
La figure 3 montre une vue schématique sensiblement de face d'un mode de réalisation en variante.Figure 3 shows a substantially front schematic view of an alternative embodiment.
Dans cette variante, la vanne 38 est réalisée sous la forme d'une vanne 44 de réglage de débit . d'air de suralimentation, reliée à deux vannes 46 de répartition d'air de suralimentation.In this variant, the valve 38 is made in the form of a valve 44 for controlling the flow rate. of charge air, connected to two valves 46 of charge air distribution.
Chaque vanne 46 est reliée d'une part à ,1a chambre d'entrée 10 pour de l'air de suralimentation, et à une chambre de sortie 18 par une dérivation de contournement 48.Each valve 46 is connected on the one hand to the inlet chamber 10 for charge air, and to an outlet chamber 18 by a bypass bypass 48.
Un agencement similaire est également adopté pour les moyens de réglage de débit et de répartition des gaz recirculés avec une vanne 50 de réglage de débit, deux vannes de répartition 52 et des dérivations de contournement 54. La portée de l'invention n'est pas limitée aux modes de réalisation décrits ci-dessus. Elle inclut notamment toutes les variantes que l'homme du métier saura envisager et qui sont définies par les revendications en annexe. A similar arrangement is also adopted for the flow control and recirculating gas distribution means with a flow control valve 50, two distribution valves 52 and bypass bypass connections 54. The scope of the invention is not limited to the embodiments described above. It includes all the variants that the skilled person will consider and which are defined by the appended claims.

Claims

Revendications claims
1. Module d ' échange de chaleur pour la régulation en température dans ' un moteur thermique à deux bancs de cylindres en V, comprenant au moins une chambre d'entrée (10), la ou les chambres d'entrée (10, 12) étant réalisées sous la forme d'au moins un conduit propre à être logé entre les bancs (4) de cylindres (6), le module (8) comportant, de part et d'autre de la chambre d'entrée (10), au moins un échangeur de chaleur ainsi qu'une chambre de sortie (18), ladite chambre de sortie (18) étant réalisée sous la forme d'un conduit sensiblement parallèle au et/ou aux conduits des chambres d'entrée (10, 12) .1. Module heat exchange for temperature regulation in an internal combustion engine with two banks of cylinders in V, comprising at least one inlet chamber (10), the one or more inlet chambers (10, 12) being formed in the form of at least one duct adapted to be housed between the banks (4) of cylinders (6), the module (8) comprising, on either side of the inlet chamber (10), at least one heat exchanger and an outlet chamber (18), said outlet chamber (18) being in the form of a duct substantially parallel to and / or to the ducts of the inlet chambers (10, 12 ).
2. Module d'échange de chaleur selon la revendication 1, dans lequel ledit module comprend unedite chambre d'entrée (10) pour de l'air de suralimentation et unedite chambre d'entrée (12) pour des gaz recirculés, lesdites chambres d'entrée (10, 12) étant réalisées sous la forme de deux conduits sensiblement parallèles adjacents propres à être logés entre les bancs (4) de cylindres (6), et dans lequel, de part et d'autre de la chambre d'entrée (10) pour de l'air de suralimentation et de la chambre d'entrée (12) pour des gaz recirculés, le module (8) comporte respectivement un refroidisseur (14) d'air de suralimentation et un refroidisseur (16) de gaz recirculés constituant ledit échangeur de chaleur, ainsi qu' unedite chambre de sortie (18) commune à laquelle sont reliés lesdits refroidisseurs (14, 16), ladite chambre de sortie (18) étant réalisée sous la forme d'un conduit sensiblement parallèle aux conduits des chambres d'entrée (10, 12), les chambres de sortie (18) étant prévues chacune pour alimenter les cylindres d'un banc respectif du moteur par un mélange d'air suralimenté et de gaz recirculés .2. Heat exchange module according to claim 1, wherein said module comprises a said inlet chamber (10) for charge air and an inlet chamber (12) for recirculated gases, said chambers d the inlet (10, 12) being in the form of two adjacent substantially parallel ducts adapted to be accommodated between the banks (4) of cylinders (6), and in which, on either side of the inlet chamber (10) for charge air and the inlet chamber (12) for recirculated gases, the module (8) comprises a charge air cooler (14) and a gas cooler (16) respectively. recirculated constituting said heat exchanger, as well as a said common outlet chamber (18) to which said coolers (14, 16) are connected, said outlet chamber (18) being in the form of a duct substantially parallel to the ducts; entry rooms (10, 12), exit rooms (18) being each provided for supplying the cylinders of a respective engine bench with a mixture of supercharged air and recirculated gas.
3. Module d'échange de chaleur selon la revendication 2, caractérisé en ce que le parcours de refroidissement de 1 ' air de suralimentation et des gaz recirculés est sensiblement transverse à une direction longitudinale desdits conduits .3. Heat exchange module according to claim 2, characterized in that the cooling path of the supercharging air and recirculated gases is substantially transverse to a longitudinal direction of said conduits.
4. Module d'échange de chaleur selon l'une des revendications 2 et 3, caractérisé en ce que la chambre d'entrée (10) pour l'air de suralimentation et la chambre d'entrée (12) pour les gaz recirculés sont réalisées avec un seul conduit comportant une -cloison (22) séparant les deux chambres (10,12).4. Heat exchange module according to one of claims 2 and 3, characterized in that the inlet chamber (10) for the charge air and the inlet chamber (12) for the recirculated gases are performed with a single conduit having a partition (22) separating the two chambers (10,12).
5. Module d'échange de chaleur selon l'une des revendications 2 à 4, caractérisé en ce que le refroidisseur d'air de suralimentation (14) et le refroidisseur de gaz recirculés (16) sont réalisés sous la forme d'un faisceau d'échange de chaleur (28) séparé en deux zones par une cloison (30) .5. Heat exchange module according to one of claims 2 to 4, characterized in that the charge air cooler (14) and the recirculated gas cooler (16) are in the form of a beam heat exchanger (28) separated into two zones by a partition (30).
6. Module d ' échange de chaleur selon l ' une des revendica- tions 2 à 4, caractérisé en ce que le refroidisseur d'air de suralimentation (14) et le refroidisseur de gaz recirculés (16) sont réalisés sous la forme de deux faisceaux d'échange de chaleur distincts.Heat exchange module according to one of Claims 2 to 4, characterized in that the charge air cooler (14) and the recirculated gas cooler (16) are designed as two separate heat exchange bundles.
7. Module d'échange de chaleur selon l'une des revendications 2 à 6, caractérisé en ce qu'il comporte des moyens de réglage de débit d'air de suralimentation (44). 7. heat exchange module according to one of claims 2 to 6, characterized in that it comprises means for adjusting the charge air flow (44).
8. Module d ' échange de chaleur selon l ' une des revendications 2 à 7, caractérisé en ce qu'il comporte des moyens de répartition d'air de suralimentation (46), et deux dérivations (48) de contournement reliant les moyens de répartition d'air de suralimentation (46) aux chambres de sortie (18) .8. Heat exchange module according to one of claims 2 to 7, characterized in that it comprises supercharging air distribution means (46), and two bypass (48) connecting the means of supercharging air distribution (46) at the outlet chambers (18).
9. Module d'échange de chaleur selon la revendication 8, caractérisé en ce que les moyens de répartition d'air de suralimentation comportent deux vannes de répartition (46), chacune reliée par une desdites dérivation de contournement (48) à une chambre de sortie (18) .9. heat exchange module according to claim 8, characterized in that the supercharging air distribution means comprise two distribution valves (46), each connected by one of said bypass bypass (48) to a chamber of output (18).
10. Module d'échange de chaleur selon les revendications 7 et 8, caractérisé en ce que les moyens de réglage de débit d'air de suralimentation et les moyens de répartition d'air de suralimentation sont réalisés sous la forme d'une seule vanne (38) .10. Heat exchange module according to claims 7 and 8, characterized in that the charge air flow control means and the charge air distribution means are formed in the form of a single valve (38).
11. Module d'échange de chaleur selon l'une des revendications 2 à 10, caractérisé en ce qu'il comporte des moyens de réglage, de débit de gaz recirculés (50) .11. Heat exchange module according to one of claims 2 to 10, characterized in that it comprises adjusting means, recirculated gas flow (50).
12. Module d'échange de chaleur selon l'une des revendicà- tions 2 à 11, caractérisé en ce qu'il comporte des moyens de répartition de gaz recirculés (52), et deux dérivations de contournement (54) reliant les moyens de répartition de gaz recirculés (52) aux chambres de sortie (18).12. Heat exchange module according to one of claims 2 to 11, characterized in that it comprises recirculated gas distribution means (52), and two bypass bypass (54) connecting the means of distributing recirculated gases (52) to the outlet chambers (18).
13. Module d'échange de chaleur selon la revendication 12, caractérisé en ce que les moyens de répartition de gaz recirculés comportent deux vannes de répartition (52), chacune reliée par une desdites dérivation de contournement (54) à une chambre de sortie (18) .13. Heat exchange module according to claim 12, characterized in that the recirculated gas distribution means comprise two distribution valves (52), each connected by one of said bypass bypass (54) to an outlet chamber (18).
14. Module d'échange de chaleur selon les revendications 11 et 12, caractérisé en ce que les moyens de réglage de débit de gaz recirculés et les moyens de répartition de gaz recirculés sont réalisés sous la forme d'une seule vanne.14. Heat exchange module according to claims 11 and 12, characterized in that the recirculated gas flow control means and the recirculated gas distribution means are formed as a single valve.
15. Module d'échange de chaleur selon l'une des revendica- tions précédentes, caractérisé en ce qu'il comporte une résistance de chauffage (40) disposée dans chaque chambre de sortie (18) .15. Heat exchange module according to one of the preceding claims, characterized in that it comprises a heating resistor (40) disposed in each outlet chamber (18).
16.Moteur thermique à deux bancs de cylindres en V, carac- térisé en ce qu'il comporte un module d'échange de chaleur16.A thermal engine with two banks of V cylinders, characterized in that it comprises a heat exchange module
(8) selon l'une des revendications 2 à 15 logé entre les bancs (4) de cylindres (6), les chambres de sortie (18) alimentant chacune les cylindres (6) d'un banc (4) respectif par un mélange d'air suralimenté et de gaz recirculés. (8) according to one of claims 2 to 15 housed between the banks (4) of cylinders (6), the outlet chambers (18) each supplying the cylinders (6) of a respective bench (4) with a mixture supercharged air and recirculated gas.
PCT/FR2006/002085 2005-09-12 2006-09-12 Heat exchange module for controlling temperature of intake gases in a two-bank internal combustion engine for a motor vehicle WO2007031637A1 (en)

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