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WO2018162783A1 - Échangeur de chaleur pour gaz, plus spécifiquement pour gaz d'échappement d'un moteur, et procédé de fabrication de cet échangeur de chaleur - Google Patents

Échangeur de chaleur pour gaz, plus spécifiquement pour gaz d'échappement d'un moteur, et procédé de fabrication de cet échangeur de chaleur Download PDF

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Publication number
WO2018162783A1
WO2018162783A1 PCT/ES2018/070182 ES2018070182W WO2018162783A1 WO 2018162783 A1 WO2018162783 A1 WO 2018162783A1 ES 2018070182 W ES2018070182 W ES 2018070182W WO 2018162783 A1 WO2018162783 A1 WO 2018162783A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
connecting piece
heat exchange
plates
engine
Prior art date
Application number
PCT/ES2018/070182
Other languages
English (en)
Spanish (es)
Inventor
José Antonio De La Fuente Romero
Darío Jorge PEÑA SÁNCHEZ
Carlos Rodrigo Marco
Original Assignee
Valeo Térmico, S. A.
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 Térmico, S. A. filed Critical Valeo Térmico, S. A.
Publication of WO2018162783A1 publication Critical patent/WO2018162783A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • 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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • 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
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts

Definitions

  • the present invention generally concerns, in a first aspect, a heat exchanger for gases, especially for exhaust gases of an engine, which includes a plurality of gas circulation ducts and a housing for heat exchange between said gases and a cooling fluid that surrounds the gas circulation ducts housed inside the housing.
  • the invention is especially applied in exhaust recirculation exchangers of an engine ("Exhaust Gas Recirculation Coolers" or EGRC). Background of the invention
  • the main function of the EGRC exchangers is the exchange of heat between the exhaust gases and a cooling fluid, in order to cool these gases.
  • EGRC heat exchangers are widely used for diesel applications to reduce emissions, and are also used in gasoline applications to reduce fuel consumption.
  • connection between the ducts and the housing can be of different types.
  • the ducts are fixed at their ends between two structural parts coupled at each end of the housing, both structural parts having a plurality of holes for receiving the ends of the respective ducts.
  • the cooling fluid inlet and outlet inside the heat exchange housing is carried out by means of cooling fluid inlet and outlet ducts that are both tightly coupled to the housing.
  • heat exchangers for gases are known in which, due to certain technical requirements, the flow of coolant fluid from the engine is conducted directly into the exchanger housing regardless of ducts specifically designed for this purpose.
  • the flow of coolant fluid is conducted directly into the heat exchange housing, through fluid inlet and outlet ports provided in the housing itself and in a joint flange with the motor that joins to the wall of the housing. Brazing between the flange and the housing wall is carried out by interposing a nickel sheet between the two components.
  • the process of assembling the heat exchangers described in the previous paragraph has the disadvantage that it requires an operation to align the coolant fluid inlet and outlet holes of the housing and the connection flange with the engine, as well as the correct placement of the Nickel sheet to ensure a tight seal by welding between both components completely.
  • the present invention provides a heat exchanger for gases, especially for exhaust gases of an engine, comprising; - a first fluid circuit for the circulation of said exhaust gases,
  • a heat exchange housing intended to delimit a second fluid circuit for the circulation of a refrigerant fluid that exchanges heat with the gases of the first circuit inside said housing
  • the exchanger is characterized by the fact that at least a wall portion of said heat exchange housing is defined by a surface of a connecting piece with the motor, said same joining piece including the inlet port and the port of output for the flow of coolant from the engine or engine block.
  • the flow of coolant fluid enters and exits the housing through the connecting piece with the engine, which is configured in this case so that it defines a portion of the wall of the heat exchange housing that enters in contact with the cooling fluid. In this way, a lighter exchanger is obtained that is easier to assemble, since it has fewer components.
  • the heat exchange housing comprises a structure provided with an opening capable of being closed by said connecting piece with the motor, at least a portion of the surface of said connecting part defining a wall of the housing arranged in correspondence with The opening.
  • this structure may be a tubular structure devoid of a wall portion on one of its sides or an open structure substantially "U" shaped, with a lateral opening.
  • the exchanger comprises two plates for assembling, at the ends of the housing, the flange or connecting piece with two structural parts intended to receive the plurality of exhaust gas circulation ducts of the first fluid circuit .
  • the present invention provides a method of manufacturing the claimed exchanger comprising performing the steps of; to. joining said connecting piece or flange to an open structure of the heat exchange housing to form at least a wall portion of said heat exchange housing, b. fit, in some recesses of the structure of said housing, assembly plates with the piece or joint flange, said assembly plates being at least partially overlapped by said piece or joint flange at the ends of the housing, c. apply welding to the contour of said part or joint flange with the assembly plates at the ends of the housing and with the structure of the housing.
  • step b) is carried out by assembling structural pieces at the ends of the housing, the edges of said structural parts including extensions that form the assembly plates with the flange or joint piece with the block of engine.
  • the solder joint of step c) is carried out using Nickel paste which is distributed along the contour of the joint piece or flange assembly, carcass structure and assembly plates.
  • Figure 1 shows a partially exploded perspective view of a state of the art gas heat exchanger.
  • Figure 3 shows a perspective view of a flange or connecting piece welded to the open housing structure.
  • Figure 4 shows a partially exploded perspective view of the assembly of housing and flange or connecting piece of figure 3, and of a structural part provided with assembly plates with the flange or connecting piece.
  • Figure 5 shows a partially exploded perspective view of a heat exchange housing that includes at its respective ends two structural parts provided with assembly plates with the part or flange connecting with the motor.
  • Figure 6 shows a detail of an assembly plate inserted in a shoulder of the open structure of the heat exchange housing.
  • Figure 1 represents a state of the art gas heat exchanger.
  • the gas exchanger of the present invention comprises;
  • the heat exchange housing 1 comprises an open structure provided with an opening 4 capable of being closed by a piece 5 connecting with the motor or motor block, so that a portion of the surface of said connecting piece 5 defines a wall of the housing 1 arranged in correspondence with said opening 4. This wall is in contact with the cooling fluid that bathes a beam of gas circulation ducts (not shown).
  • connection piece 5 is configured as a connection flange with the motor, and is provided with holes defining the coolant fluid inlet and outlet ports 2, 3, which can be connected directly to the flow of coolant from the engine.
  • the same flange includes a plurality of holes 6 for the passage of fasteners.
  • Figure 2 shows an outline of the opening
  • the plates 8 of assembly are joined in solidarity with the lateral edges of structural pieces 9 provided at the ends 1a, 1b of the housing 1 to receive conduits (not shown) for circulation of the first fluid circuit.
  • these assembly plates 8 are configured as extensions on the sides of said structural parts 9, being able to be inserted in the recess 7 of the contour of the opening 4 of the structure of the housing 1, flush with the outermost surface of the same heat exchange housing 1 (see detail in Figure 6).
  • Figures 8 and 9 show a front view and a section of the flange or connecting piece 5 with the motor in which there is a projection 10 adapted to fit in the opening 4 of the housing between the assembly plates 8.
  • the projection 10 is located substantially in the same plane as the assembly plates 8, determining a wall portion of the exchange housing 1 that comes into contact with the cooling fluid.
  • each duct (not shown) of the first gas circulation circuit is inserted into an orifice of the structural parts 9 of the ends 1 a, 1 b of the heat exchange housing 1, these being left conduits exposed to the flow of coolant from the engine that circulates directly between an inlet port and an outlet port of the part 5 or flange of connection with the engine.
  • the tests have made it possible to verify that the proposed assembly solution guarantees an optimum degree of tightness of the refrigerant fluid circuit inside the housing 1.

Landscapes

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

Abstract

L'échangeur de chaleur comprend un premier circuit de fluide de gaz d'échappement, un boîtier (1) d'échangeur de chaleur, et un port (2) d'entrée et un port (3) de sortie pour le liquide de refroidissement, et se caractérise en ce qu'une portion d'une paroi du boîtier (1) d'échangeur de chaleur est définie par une surface d'une pièce (5) de liaison avec le moteur, le port (2) d'entrée et le port (3) de sortie pour le liquide de refroidissement issu du moteur comprenant cette même pièce (5) de liaison. Le procédé comprend les étapes de : liaison de cette pièce (5) de liaison à une structure du boîtier (1), d'inclusion dans des dépressions (7) de la structure du boîtier (1) des plaques (8) d'assemblage avec cette pièce (5) de liaison, et, d'application du soudage au contour de cette pièce (5) de liaison.
PCT/ES2018/070182 2017-03-10 2018-03-12 Échangeur de chaleur pour gaz, plus spécifiquement pour gaz d'échappement d'un moteur, et procédé de fabrication de cet échangeur de chaleur WO2018162783A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201730318A ES2681129B1 (es) 2017-03-10 2017-03-10 Intercambiador de calor para gases, en especial para gases de escape de un motor, y metodo de fabricacion de dicho intercambiador
ESP201730318 2017-03-10

Publications (1)

Publication Number Publication Date
WO2018162783A1 true WO2018162783A1 (fr) 2018-09-13

Family

ID=63435095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2018/070182 WO2018162783A1 (fr) 2017-03-10 2018-03-12 Échangeur de chaleur pour gaz, plus spécifiquement pour gaz d'échappement d'un moteur, et procédé de fabrication de cet échangeur de chaleur

Country Status (2)

Country Link
ES (1) ES2681129B1 (fr)
WO (1) WO2018162783A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099847A2 (fr) * 1999-11-10 2001-05-16 Isuzu Motors Limited Système de refroidissement pour gaz d'échappement recirculé et pour huile
US20080053644A1 (en) * 2006-08-31 2008-03-06 Klaus Beetz Heat exchanger unit
US20080257317A1 (en) * 2005-07-05 2008-10-23 Victor Cerabone Internal combustion engine with cooling system and exhaust gas recirculation system
WO2013001017A1 (fr) * 2011-06-30 2013-01-03 Valeo Systemes Thermiques Boitier d'echangeur a plaques empilees et echangeur comprenant un tel boitier.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099847A2 (fr) * 1999-11-10 2001-05-16 Isuzu Motors Limited Système de refroidissement pour gaz d'échappement recirculé et pour huile
US20080257317A1 (en) * 2005-07-05 2008-10-23 Victor Cerabone Internal combustion engine with cooling system and exhaust gas recirculation system
US20080053644A1 (en) * 2006-08-31 2008-03-06 Klaus Beetz Heat exchanger unit
WO2013001017A1 (fr) * 2011-06-30 2013-01-03 Valeo Systemes Thermiques Boitier d'echangeur a plaques empilees et echangeur comprenant un tel boitier.

Also Published As

Publication number Publication date
ES2681129B1 (es) 2019-06-21
ES2681129A1 (es) 2018-09-11

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