EP1925899B1 - Echangeur de chaleur pour gaz, notamment pour les gaz d'échappement d'un moteur - Google Patents

Echangeur de chaleur pour gaz, notamment pour les gaz d'échappement d'un moteur Download PDF

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Publication number
EP1925899B1
EP1925899B1 EP07120252A EP07120252A EP1925899B1 EP 1925899 B1 EP1925899 B1 EP 1925899B1 EP 07120252 A EP07120252 A EP 07120252A EP 07120252 A EP07120252 A EP 07120252A EP 1925899 B1 EP1925899 B1 EP 1925899B1
Authority
EP
European Patent Office
Prior art keywords
exchanger
egr valve
rim
branch pipe
connecting means
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.)
Active
Application number
EP07120252A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1925899A3 (fr
EP1925899A2 (fr
Inventor
Francisco Lopez Lazaro
Abel Ruiz
Silvia Guillen Lambea
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 EP1925899A2 publication Critical patent/EP1925899A2/fr
Publication of EP1925899A3 publication Critical patent/EP1925899A3/fr
Application granted granted Critical
Publication of EP1925899B1 publication Critical patent/EP1925899B1/fr
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Classifications

    • 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
    • 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
    • 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
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases

Definitions

  • the present invention relates to a heat exchanger for gas, in particular for the exhaust gases of an engine.
  • the invention is particularly applicable to exhaust gas recirculation exchangers (Exhaust Gas Recirculation Coolers or EGRC), exhaust gas exchangers for the exhaust line thermal regulation (ETR) , and charge air coolers or intercoolers (Charge Air Coolers or CAC).
  • EGRC exhaust Gas Recirculation Coolers
  • ETR exhaust line thermal regulation
  • CAC Charge Air Coolers
  • a well-established practice in the automotive field is to use a diesel engine exhaust gas recirculation system, known as EGR or "Exhaust Gas Recycling", to mix these gases with the engine. intake air since the presence of the exhaust gas in the mixture reduces the formation of nitrogen oxides (NOx).
  • EGR diesel engine exhaust gas recirculation system
  • NOx nitrogen oxides
  • the exhaust gases Before being mixed with the intake air, the exhaust gases can be cooled in a heat exchanger (EGRC or "Exhaust Gas Recycling Cooler”) installed in the loop of the EGR system, with the aim of improving the efficiency of the system.
  • EGRC Exhaust Gas Recycling Cooler
  • the system loop further includes a valve (EGR valve) regulating the passage of exhaust gases therethrough.
  • EGR valve regulating the passage of exhaust gases therethrough.
  • the heat exchanger itself can have several different configurations: it can, for example, include a tubular carcass inside which are arranged a series of tubes parallel for the passage of gases, the cooling fluid flowing in the carcass outside the tubes; in another embodiment, the exchanger consists of a series of parallel plates constituting the heat exchange surfaces, so that the exhaust gas and the cooling fluid circulate between two plates in alternating layers.
  • the carcass is joined to the lines of the recirculation line by connecting means which may take the form of a V-shaped connection or a peripheral flange or flange, depending on the design of the recirculation line where assembly of the exchanger.
  • peripheral rim may be assembled together with a gas reservoir, the gas reservoir then constituting an intermediate piece between the carcass and the rim.
  • the rim can also be assembled directly on the carcass. This design is often the case where the heat exchanger is attached directly to an EGR valve.
  • the most common design incorporates a bypass conduit carrying coolant fluid, flowing through the EGR exchanger, to the EGR valve. Since the EGR exchanger is assembled to the EGR circuit by a peripheral rim, it is therefore necessary to manufacture the bypass duct of the cooling fluid by incorporating it into said peripheral rim.
  • the peripheral flange integrating the bypass duct of the cooling fluid has a complex configuration whose manufacture generally requires a process of microfusion or sintering.
  • this type of process has the disadvantage of being expensive because of the complexity of the workpiece.
  • the patent DE 10359054 discloses a method of manufacturing a peripheral flange by stamping, the peripheral flange does not integrate any bypass duct.
  • the subject of the present invention is a heat exchanger for gases, in particular for the exhaust gases of an engine, making it possible to overcome the drawbacks of exchangers known in the art, said exchanger benefiting from reduced manufacturing costs and ensuring better integration.
  • bypass duct conveying the cooling fluid of the EGR exchanger to the EGR valve.
  • the gas heat exchanger in particular for the exhaust gases of an engine, object of the present invention, is of the type comprising a plurality of parallel ducts arranged inside a carcass, in which the gases circulate. to cool by exchange thermal with a cooling fluid; connecting means to a conduit of the gas recirculation line; and a bypass duct integrated with said connecting means and for circulating the cooling fluid to an EGR valve regulating the passage of gases through the exchanger; and is characterized in that said connecting means integrated in said bypass duct comprise at least two parts manufactured by stamping.
  • said at least two stamped parts connecting means are joined together by welding.
  • the coupling means integrated in said bypass duct comprise a first peripheral flange connected to the recirculation line and to the EGR valve, and a second rim comprising said stamped bypass duct, the two flanges being joined. between them.
  • the surface of the second flange completely or partially covers the surface of the first flange.
  • the second rim incorporates a tubular section of short length to assemble directly to the carcass.
  • an inlet of the bypass duct is formed in said tubular section and connected to a corresponding hole of the carcass.
  • the two flanges incorporate a cooling fluid inlet orifice from the bypass duct to the EGR valve, and a coolant outlet port from the EGR valve to the cooling circuit.
  • the coupling means also comprise a conduit for guiding the cooling fluid from the EGR valve to the cooling circuit.
  • the heat exchanger 1 is composed of a carcass 2 whose inside contains a bundle of parallel ducts (not shown) for the passage of the gases to be cooled.
  • a cooling fluid circulates in the carcass 2, outside the ducts.
  • the carcass 2 has a substantially rectangular section and is closed to one of its ends to receive the bundle of ducts which, in this case, is of the "U" type, in other words the inlet and the outlet of said ducts are situated on the same side at the free end of the carcass 2.
  • the exchanger 1 also incorporates connection means 3 to a conduit of the gas recirculation line (not shown), and a bypass duct 6 integrated with said connection means 3, for circulating the cooling fluid to an EGR valve (not shown) which regulates the passage of gases through the exchanger 1.
  • said coupling means 3 comprise two peripheral flanges 4,5 produced by stamping.
  • the first peripheral flange 4 is connected to the recirculation line and the EGR valve, and the second peripheral flange 5 comprises said branch duct 6 stamped, the two flanges 4,5 being joined together by welding.
  • the first flange 4 serves to connect the carcass 2 to the recirculation line and the EGR valve, ensuring adequate sealing. Its mechanical strength is ensured by its embossed design having a shape and a size adapted.
  • the second edge 5 makes it possible to create the walls of said bypass duct 6.
  • the surface of said second flange 5 can completely cover the surface of the first flange 4 (see FIG. Figures 1 and 2 ), or, in another embodiment, only a part thereof, so as to save the material (see figure 3 ).
  • the two stamped flanges 4.5 are made of stainless steel, or may be made of any other material that may reduce weight and manufacturing costs.
  • the second rim 5 also incorporates a tubular section 7 of short length to be assembled directly to the carcass 2, for example by welding.
  • the inlet orifice 8 of the bypass duct 6 is formed in said tubular section 7 and connected to a corresponding orifice 9 of the carcass 2.
  • the two flanges 4,5 likewise incorporate a coolant inlet 10 from the bypass duct 6 to the EGR valve, and an outlet 11 of the coolant from the EGR valve to the cooling circuit.
  • the coupling means 3 also comprise a conduit 12 for guiding the cooling fluid, through the outlet orifice 11, from the EGR valve to the cooling circuit (see FIG. figure 3 ).
  • the two peripheral rims 4,5 also incorporate orifices 13 intended to receive hardware elements making it possible to fix them to the duct of the gas recirculation line.
  • the coolant is returned to the cooling circuit through the outlet orifice 11 of the flanges 4,5, being guided by the corresponding conduit 12 of the cooling circuit.

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)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP07120252A 2006-11-17 2007-11-08 Echangeur de chaleur pour gaz, notamment pour les gaz d'échappement d'un moteur Active EP1925899B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200602935A ES2304092B1 (es) 2006-11-17 2006-11-17 Intercambiador de calor para gases, en especial de los gases de escape de un motor.

Publications (3)

Publication Number Publication Date
EP1925899A2 EP1925899A2 (fr) 2008-05-28
EP1925899A3 EP1925899A3 (fr) 2010-11-17
EP1925899B1 true EP1925899B1 (fr) 2011-11-30

Family

ID=39145431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07120252A Active EP1925899B1 (fr) 2006-11-17 2007-11-08 Echangeur de chaleur pour gaz, notamment pour les gaz d'échappement d'un moteur

Country Status (3)

Country Link
EP (1) EP1925899B1 (es)
AT (1) ATE535770T1 (es)
ES (2) ES2304092B1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2399036B1 (es) * 2010-06-28 2014-01-28 Valeo Térmico, S.A. Intercambiador de calor para gases en especial de los gases de escape de un motor.
DE102011080828A1 (de) 2011-08-11 2013-02-14 Mahle International Gmbh Plattenwärmetauscher
FR2993968B1 (fr) * 2012-07-24 2018-07-27 Valeo Systemes Thermiques Collecteur pour echangeur de chaleur et echangeur de chaleur comprenant un tel collecteur

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU90761B1 (en) * 2001-04-20 2002-10-21 Delphi Tech Inc Device for exhaust gas recirculation
DE10217626A1 (de) * 2002-04-20 2003-10-30 Wahler Gmbh & Co Kg Gustav Vorrichtung zur Rückführung des Abgases einer Brennkraftmaschine
US7743816B2 (en) * 2002-05-15 2010-06-29 Behr Gmbh & Co. Kg Switchable waste gas exchanger
ES2199060B1 (es) * 2002-05-30 2004-11-16 Valeo Termico, S.A. Intercambiador de calor para gases.
US7013565B1 (en) * 2003-08-20 2006-03-21 Zelinski Joseph R Removable collector for liquid cooled exhaust
US7108054B2 (en) * 2003-09-11 2006-09-19 Honeywell International, Inc. Heat exchanger
DE10359054A1 (de) * 2003-12-17 2005-07-21 Daimlerchrysler Ag Flansch
DE10359806A1 (de) * 2003-12-19 2005-07-14 Modine Manufacturing Co., Racine Wärmeübertrager mit flachen Rohren und flaches Wärmeübertragerrohr
DE102004019554C5 (de) * 2004-04-22 2014-03-27 Pierburg Gmbh Abgasrückführsystem für eine Verbrennungskraftmaschine
WO2006035986A1 (ja) * 2004-09-28 2006-04-06 T.Rad Co., Ltd. Ｅｇｒクーラ
ES2296514B1 (es) * 2006-04-05 2009-03-16 Valeo Termico, S.A. Intercambiador de calor para gases, en especial de los gases de escape de un motor.

Also Published As

Publication number Publication date
EP1925899A3 (fr) 2010-11-17
EP1925899A2 (fr) 2008-05-28
ATE535770T1 (de) 2011-12-15
ES2304092B1 (es) 2009-07-03
ES2304092A1 (es) 2008-09-01
ES2377950T3 (es) 2012-04-03

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