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EP1367253B1 - Echangeur de chaleur pour un système EGR avec un conduit de dérivation intégré - Google Patents

Echangeur de chaleur pour un système EGR avec un conduit de dérivation intégré Download PDF

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Publication number
EP1367253B1
EP1367253B1 EP03380127A EP03380127A EP1367253B1 EP 1367253 B1 EP1367253 B1 EP 1367253B1 EP 03380127 A EP03380127 A EP 03380127A EP 03380127 A EP03380127 A EP 03380127A EP 1367253 B1 EP1367253 B1 EP 1367253B1
Authority
EP
European Patent Office
Prior art keywords
pass duct
heat exchanger
egr system
duct
pass
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.)
Expired - Lifetime
Application number
EP03380127A
Other languages
German (de)
English (en)
Other versions
EP1367253A1 (fr
EP1367253B2 (fr
Inventor
Xoan Xosé Hermida Dominguez
Carlos Manuel Castano Gonzalez
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.)
BorgWarner Emissions Systems Spain SL
Original Assignee
Dayco Ensa SL
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=29414913&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1367253(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dayco Ensa SL filed Critical Dayco Ensa SL
Publication of EP1367253A1 publication Critical patent/EP1367253A1/fr
Publication of EP1367253B1 publication Critical patent/EP1367253B1/fr
Application granted granted Critical
Publication of EP1367253B2 publication Critical patent/EP1367253B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F28D7/16—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 the conduits being arranged in parallel spaced relation
    • F28D7/163—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 the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • 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
    • 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
    • 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
    • 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 refers to a heat exchanger for an exhaust gas recirculation system (EGR) of an internal combustion engine, and more specifically, a heat exchanger with an integrated by-pass duct.
  • EGR exhaust gas recirculation system
  • EGR systems exhaust gas recirculation systems in internal combustion engines
  • DE-C-914 450 discloses a heat exchanger for the exhaust gases of an internal combustion engine having a cylindrical casing that houses a refrigeration chamber formed by a plurality of refrigeration tubes and a by-pass duct.
  • the exchanger is coupled to the exhaust circuit by an end flange having a single opening communicating with both the refrigeration tubes and the by-pass duct.
  • a throttle valve controls the by-pass flow.
  • the object of the present invention is to provide a heat exchanger including, in a single unit, both the refrigeration chamber for cooling the gases as well as a by-pass duct through which the gases must circulate when their cooling is not necessary, which allows to easily control the gas flow through the refrigeration chamber and the by-pass duct, and thus to limit the engine emissions, and is structurally simple and compact so as to be easily integrated in the engine.
  • the heat exchanger is formed by a cylindrical casing and, arranged within the casing, a refrigeration chamber constituted, in a well known manner, of a plurality of tubes (which we shall call refrigerating tubes hereinafter), and a by-pass tube.
  • a flange is arranged with a first opening communicating with the refrigerating tubes of the refrigeration chamber and a second opening communicating with the by-pass duct, a separation area existing between said openings.
  • the shape of these openings is related to both the desired distribution of the areas intended for the refrigeration chamber and the by-pass duct as well as the shape of the latter.
  • the preferred shape for said openings would be that of two circular segments delimited in said circular section by means of a separation strip, the one intended for the refrigeration chamber being larger than a semicircle.
  • the present invention also comprises other shapes and particularly oval shapes.
  • Said separation area acts as a closing means of the exchanger gas intake side in combination with a valve suitable for opening one of the two openings and simultaneously closing the other, depending on the needs established by the EGR system.
  • An additional feature of the invention is that said casing is closed by means of external caps enveloping its edges to aid in assembling the refrigerating tubes and to aid in carrying out the welds. Said coupling flange to the gas intake device would be welded to the corresponding casing cap.
  • said by-pass duct is a double-walled duct with an intermediate air chamber.
  • part of the exhaust gases from the engine go to the exterior through the exhaust pipe and another part is recirculated.
  • the amount to be recirculated is controlled by the EGR valve that, in determined circumstances can even be closed and not recirculate anything, for example in a maximum power situation.
  • the recirculated gases mix with the clean air and return to the engine through the intake manifold.
  • the recirculated gases may or may not be cooled, depending on the position of the corresponding valve.
  • the present invention provides a heat exchanger with the integrated by-pass duct.
  • FIGS 1 to 5 show a heat exchanger 1 for exhaust gases according to the present invention formed by a cylindrical casing 2 housing a refrigeration chamber 3 inside constituted of a set of tubes 4, commonly known in the art, and a duct 9 acting as a by-pass duct so that those exhaust gases not to be cooled can pass through it.
  • a refrigerating liquid circulates through the casing 2, entering through a duct 5 and exiting through a duct 7.
  • the casing 2 is closed with caps 11 and 13 on both sides, serving as fixing means of the tubes 4 and of the by-pass duct 9. These caps envelope the edges of the casing 2, which aids in the assembly process of the tubes 4 and the welding process.
  • the heat exchanger 1 for exhaust gases according to the present invention is coupled with the gas intake device (not shown) by means of the flange 15 in which a first opening 21 communicating with the refrigerating tubes 4 and a second opening communicating wiht the by-pass duct 9 are provided.
  • a suitable valve (not shown), actuated by the corresponding control means, drive the exhaust gases towards the refrigeration chamber 3 or towards the by-pass duct 9.
  • Coupling the heat exchanger to the gas intake manifold of the engine is carried out by using conventional means such as the flange 16, which can be the same as the flange 15 for economic or process reasons, or other known means in the art such as a re-driving cone plus a flange or a re-driving cone and a ring.
  • conventional means such as the flange 16, which can be the same as the flange 15 for economic or process reasons, or other known means in the art such as a re-driving cone plus a flange or a re-driving cone and a ring.
  • the flange 15 openings 21 and 22 dimensions are closely related to the areas dedicated to the refrigeration chamber 3 and to the by-pass duct 9.
  • the presence of a separation area 23 of the openings 21 and 22 can also be seen in the flange 15, in relation with the available space between the refrigerating tubes 4 and the by-pass duct, it is useful as a closing means in combination with said valve.
  • the first opening 21 has a circular segment shape of a surface somewhat larger than a semicircle of the casing 2, and the second opening 22 also has a circular segment shape although with rounded vertices.
  • the separation area 23 is located between both openings, with its central span delimited by straight lines. Twelve tubes 4 are located facing the first opening 21, and the oval-shaped by-pass duct 9 is located facing the housing 22.
  • Figures 6 and 7 show flanges 18 and 19 in which the two housings 21 and 22 have a circular segment shape.
  • the by-pass duct 9 has a semicircular shape, and in the second it has an oval shape. It could also have a circular shape and in each case there would be a different degree of use of the space delimited by the opening 22.
  • the dimensioning of the openings 21 and 22, the refrigeration area using one or another number and type of refrigerating tubes 4, and the by-pass duct 9 will depend on the functional needs of each case.
  • the circular shape will be chosen for the by-pass duct 9 if a better relationship is desired between the passing area and the exchange surface to minimize the heat exchange
  • a circular segment shape of Figure 6 will be chosen if the intention is to take maximum advantage of the surface delimited by the opening 22 to minimize the load losses
  • the oval shape of Figure 7 will be chosen if the intention is to have an intermediate option between the previous ones.
  • the refrigeration chamber 3 will be permanently active since the circulation of the refrigerating liquid through the casing 2 will form part of the general cooling circuit of the engine. Subsequently, the possibility of using double-walled by-pass ducts 9 with an intermediate air chamber is considered in order to ensure that the cooling of the gases circulating through it do not exceed a predetermined value.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (7)

  1. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement possédant une chambre de réfrigération ou de refroidissement (3) formée par plusieurs tubes réfrigérants (4), un conduit de dérivation (9) des gaz d'échappement qui ne devraient pas pénétrer dans la chambre de réfrigération (3) et des moyens de couplage (15, 18, 19) pour coupler l'échangeur de chaleur (1) à un dispositif d'admission de gaz, la chambre de réfrigération ou de refroidissement (3) et le conduit de dérivation (9) étant disposés à l'intérieur d'un coffrage cylindrique (2) fermé des deux côtés par des bouchons (11, 13) supportant les tubes réfrigérants (4) et le conduit de dérivation (9) ; lesdits moyens de couplage incluant une bride (15, 18, 19), caractérisé en ce que ladite bride définit une première ouverture (21) communiquant avec les tubes réfrigérants (4) de la chambre de réfrigération ou de refroidissement (3), une deuxième ouverture (22) communiquant avec le conduit de dérivation (9) et une zone de séparation (23) entre elles, lesdites ouvertures (21, 22) de la bride (18, 19) possédant une forme de segment de cercle ou circulaire.
  2. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement selon la revendication 1, caractérisé en ce que la deuxième ouverture (22) de la bride (15) communiquant avec le conduit de dérivation (9) possède des sommets arrondis.
  3. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement selon les revendications 1 ou 2, caractérisé en ce que la section transversale du conduit de dérivation (9) possède une forme de segment de cercle.
  4. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la section transversale du conduit de dérivation (9) possède une forme circulaire.
  5. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la section transversale du conduit de dérivation (9) possède une forme ovale.
  6. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdits bouchons (11, 13) enveloppent les bords dudit coffrage pour aider à l'assemblage des tubes réfrigérants (4) et à l'accomplissement des soudures.
  7. Un échangeur de chaleur (1) pour un système de recirculation des gaz d'échappement selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit de dérivation est un conduit à double paroi avec une chambre à air intermédiaire.
EP03380127A 2002-05-28 2003-05-28 Echangeur de chaleur pour un système EGR avec un conduit de dérivation intégré Expired - Lifetime EP1367253B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200201218 2002-05-28
ES200201218A ES2209618B1 (es) 2002-05-28 2002-05-28 Intercambiador de calor para un sistema "egr" con un conducto de derivacion integrado.

Publications (3)

Publication Number Publication Date
EP1367253A1 EP1367253A1 (fr) 2003-12-03
EP1367253B1 true EP1367253B1 (fr) 2006-07-12
EP1367253B2 EP1367253B2 (fr) 2010-06-16

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ID=29414913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03380127A Expired - Lifetime EP1367253B2 (fr) 2002-05-28 2003-05-28 Echangeur de chaleur pour un système EGR avec un conduit de dérivation intégré

Country Status (4)

Country Link
EP (1) EP1367253B2 (fr)
AT (1) ATE333046T1 (fr)
DE (1) DE60306717T3 (fr)
ES (2) ES2209618B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101165332B (zh) * 2006-10-18 2012-02-22 株式会社电装 热交换器
US8464778B2 (en) 2004-05-07 2013-06-18 Behr Gmbh & Co. Kg Heat exchanger for internal combustion engines

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DE102005040612A1 (de) 2005-08-27 2007-03-01 Behr Gmbh & Co. Kg Abgaswärmeübertrager
ES2322728B1 (es) * 2005-11-22 2010-04-23 Dayco Ensa, S.L. Intercambiador de calor de tres pasos para un sistema "egr".
JP5145718B2 (ja) * 2006-02-03 2013-02-20 株式会社デンソー 熱交換器
DE102007031419A1 (de) * 2006-07-06 2008-01-10 Behr Gmbh & Co. Kg Abgaskühler, insbesondere für ein Kraftfahrzeug
ES2321783B1 (es) * 2006-09-21 2010-01-12 Valeo Termico, S.A. Intercambiador de calor para gases, en especial de los gases de escape de un motor.
DE102009035674A1 (de) * 2009-07-30 2011-02-03 Behr Gmbh & Co. Kg Wärmetauscher, Wärmetauschersystem
DE102011007748A1 (de) 2011-04-20 2012-10-25 Behr Gmbh & Co. Kg Abgaskühler zum Kühlen von Verbrennungsabgas einer Verbrennungskraftmaschine, Wassersammeladapter, Abgaskühlsystem und Verfahren zum Herstellen eines Abgaskühlsystems
SE537803C2 (sv) 2011-09-30 2015-10-20 Scania Cv Ab EGR-kylare samt förbränningsmotor med en sådan EGR-kylare
EP2743488A1 (fr) * 2012-12-11 2014-06-18 BorgWarner Inc. Dispositif de gestion de gaz d'échappement intégré
JP5941878B2 (ja) * 2013-07-25 2016-06-29 株式会社ユタカ技研 熱交換器及び熱交換デバイス
EP2944913B1 (fr) * 2014-05-16 2018-09-05 Borgwarner Emissions Systems Spain, S.L.U. Dispositif d'échange de chaleur
CN104500282A (zh) * 2014-12-15 2015-04-08 无锡隆盛科技股份有限公司 可变冷却效率的egr冷却器
CN113335019B (zh) * 2021-06-15 2022-09-30 东风汽车集团股份有限公司 汽车热管理系统集成换热器

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8464778B2 (en) 2004-05-07 2013-06-18 Behr Gmbh & Co. Kg Heat exchanger for internal combustion engines
US9803544B2 (en) 2004-05-07 2017-10-31 Mahle International Gmbh Heat exchanger for internal combustion engines
CN101165332B (zh) * 2006-10-18 2012-02-22 株式会社电装 热交换器

Also Published As

Publication number Publication date
ES2268306T3 (es) 2007-03-16
ES2209618A1 (es) 2004-06-16
EP1367253A1 (fr) 2003-12-03
DE60306717T3 (de) 2011-01-05
ES2268306T5 (es) 2010-10-27
EP1367253B2 (fr) 2010-06-16
ATE333046T1 (de) 2006-08-15
DE60306717T2 (de) 2007-08-02
ES2209618B1 (es) 2005-08-16
DE60306717D1 (de) 2006-08-24

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