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EP3203173B1 - Échangeur thermique de gaz d'échappement - Google Patents

Échangeur thermique de gaz d'échappement Download PDF

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Publication number
EP3203173B1
EP3203173B1 EP17151774.1A EP17151774A EP3203173B1 EP 3203173 B1 EP3203173 B1 EP 3203173B1 EP 17151774 A EP17151774 A EP 17151774A EP 3203173 B1 EP3203173 B1 EP 3203173B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
heat transfer
heat exchanger
bypass channel
gas heat
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.)
Not-in-force
Application number
EP17151774.1A
Other languages
German (de)
English (en)
Other versions
EP3203173A1 (fr
Inventor
Pramod Barhate
Simon HUND
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3203173A1 publication Critical patent/EP3203173A1/fr
Application granted granted Critical
Publication of EP3203173B1 publication Critical patent/EP3203173B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/06—Derivation channels, e.g. bypass

Definitions

  • the present invention relates to an exhaust gas heat exchanger with a heat exchanger region and a bypass channel bypassing it according to the preamble of claim 1.
  • a bypass channel is usually used in conventional exhaust gas heat exchangers. This is partly housed in the exhaust gas heat exchanger, but partly also mounted externally thereto.
  • the bypass channel has hitherto been designed as a single tube with surrounding knitwear or as a double tube, whereby a thermal insulation is to be achieved.
  • the hot exhaust gas can bypass the cooling path during the cold start process and thereby bring the internal combustion engine and downstream oxidation catalysts to their operating temperature more quickly.
  • a heat exchanger with flow channels which can be traversed by a common first outlet to a common first outlet of a first fluid.
  • the heat exchanger also has a housing which receives the flow channels in itself and flows through by a second fluid from a second inlet region to a second outlet region.
  • the flow channels have a flat cross-section and are in fluid communication with each other.
  • a heat exchanger which comprises a bypass channel for guiding an exhaust gas and / or a charge air in a tubular body.
  • a bypass channel for guiding an exhaust gas and / or a charge air in a tubular body.
  • this is isolated by a fiber material relative to the heat exchanger.
  • an exhaust heat exchanger for transferring heat between the exhaust gas of an internal combustion engine and a coolant which has a housing, an exhaust gas inlet opening and an exhaust gas outlet opening and a heat transfer area encloses.
  • a through-flow of at least a partial flow of the exhaust gas bypass is integrated, which is thermally insulated from the coolant, wherein the bypass is double-walled.
  • DE-A-10346250 discloses an exhaust gas heat exchanger according to the preamble of claim 1.
  • the present invention therefore deals with the problem of providing an improved or at least one alternative embodiment for an exhaust gas heat exchanger of the generic type, which is characterized in particular by an increased performance.
  • the present invention is based on the general idea, in a known per se exhaust gas heat exchanger with a heat exchanger region and a bypass channel bypassing them now for the first time instead of previously used in the heat exchanger region tube bundle heat exchanger now use stacked disc cooler.
  • the exhaust gas heat exchanger according to the invention also has a bypass valve which, depending on the position, divides an incoming exhaust gas flow between the heat exchanger region and thus the stacked plate radiator and the bypass duct arranged there.
  • the stacked-plate radiator is arranged according to the invention with a plurality of stacking disks, the bypass duct being attached, in particular soldered, to an outer, in particular an uppermost, stacking disk of the stacked-disk radiator.
  • the exhaust gas heat exchanger according to the invention has a significantly increased performance, which can not be achieved with conventional tube bundle coolers.
  • the exhaust gas heat exchanger according to the invention has no housing in which the bypass channel is integrated, but this is simply soldered to the outside, that is the top or bottom stacking disk.
  • the bypass channel according to the invention is coupled on three sides with the environment and not with the heat exchanger area, which in itself a significantly improved energy decoupling can be created to heat exchanger area, as in previously known from the prior art exhaust gas heat exchangers with integrated tube bundle cooler in a housing and bypass channel was even possible.
  • a U-profile connected to the outer stacking disk which forms the bypass channel together with the outer stacking disk.
  • Such a U-profile can be produced relatively cheaply a pipe, whereby the exhaust gas heat exchanger can be structurally simple in construction and manufactured inexpensively.
  • bypass channel and the stacked disc radiator are connected to the end in a diffuser or a flange, or in particular soldered thereto.
  • turbulence inserts in particular rib or lattice structures, are arranged between the individual stack disks.
  • a turbulence insert can be a heat transfer significantly improved turbulent Flow of the coolant can be generated, whereby the performance of the Abgasebenstedtragers can be increased.
  • each stacking disk of the stacked disk cooler is composed of a first and a second element.
  • the first element may for example be U-shaped and have pronounced inner ribs, while the second element is trough-shaped with a tub bottom and tub edges.
  • the inner ribs lie on the tub bottom and are in particular connected to these, for example soldered. Due to the multi-part construction of each stacking disk in particular their production is simpler and thereby cheaper possible.
  • the present invention is further based on the general idea of equipping an internal combustion engine with at least one such exhaust heat exchanger, which can be achieved faster at cold start their operating temperature, as well as, for example, the internal combustion engine downstream oxidation catalysts, whereby the nitrogen oxide emissions and fuel consumption can be reduced ,
  • an exhaust gas heat exchanger 1 according to the invention has a heat exchanger region 2 and a bypass channel 3 bypassing this heat exchanger region 2.
  • a bypass valve 4 is provided, which in the present case is designed as a flap valve, and which, according to position, divides the exhaust gas stream 5 between the heat exchanger region 2 and the bypass channel 3.
  • a Stapelaminkühler 6 is arranged with a plurality of stacking disks 7, wherein the Bypass channel 3 attached to an outer stacking disk 7 'of the stacked disk cooler 6, in particular soldered.
  • the great advantage of the Abgastageübertragers invention lies in the fact that the bypass duct 3 is not as in the prior art known and a tube bundle having exhaust gas heat exchanger enclosed by a housing and thus flows around coolant, but connected to one side of the stacked disc cooler 6 and is surrounded by the ambient air around the other three sides.
  • This makes it possible to significantly shorten a cold start phase of an internal combustion engine 8, since the exhaust gas stream 5 flowing through the bypass channel 3 is not cooled by the stack disc radiator 6 and thereby both the internal combustion engine 8 and downstream oxidation catalysts can be brought to operating temperature more quickly. By quickly reaching the operating temperature can be in the internal combustion engine 8, both the consumption of fuel and the emission of nitrogen oxides reduced.
  • the exhaust gas heat exchanger 1 has a lateral coolant inlet 9 and a lateral coolant outlet 10, via which the exhaust gas heat exchanger 1 is connected to a coolant circuit.
  • the coolant inlet 9 or the coolant outlet 10 can also be arranged in reverse (countercurrent cooler).
  • both the bypass channel 3 and the stack disc cooler 6 are longitudinally connected in a diffuser 11 or generally to a flange 12 or connected, in particular soldered to this, are.
  • a housing as previously known from the prior art exhaust gas heat exchanger, the exhaust gas heat exchanger 1 according to the invention does not have, thereby saving this component and thus not only the assembly costs, but also the storage and logistics and material costs can be reduced.
  • the cooler designed as a stacked disc cooler 6 is much more powerful than previously used in this area tube bundle cooler.
  • bypass channel 3 is formed by a simple tube 13.
  • This tube 13 may be formed, for example, as a sheet metal tube or as an extruded profile and thereby manufactured comparatively inexpensive.
  • the bypass channel 3 designed as a pipe 13 is connected via spacer elements 14 to the outer stacking disk 7 'of the stack disk cooler 6, so that between the bypass channel 3 and the outermost stacking disk 7 'of the stacked disk cooler 6, a heat-insulating air gap 15 remains.
  • each stacking disk 7, 7 ' is composed of a first and a second element 21, 22.
  • the first element 21 may for example be U-shaped and have pronounced inner ribs 23, while the second element 22 is trough-shaped, with a tub bottom 24 and tub edges 25, with mounted stacking disk 7, 7 'the inner ribs 23 abut the tub bottom 24 and in particular connected to this, for example soldered, are.
  • a particularly rigid stacked disc cooler 6 can be achieved.
  • the individual stacking disks 7, 7 'together exhaust channels 26 and coolant channels 27.
  • turbulence inserts 28, in particular ribs or lattice structures may be arranged, which generate a turbulent flow and thus improve the heat transfer.
  • bypass channel 3 is formed by a stacking disk 7,7 '.
  • This stacking disk is preferably formed identically to the other stacking disks 7, whereby the variety of parts is reduced.
  • FIGS. 16 and 17 it can be seen that the bypass channel 3 is formed by the two uppermost stacking disks 7, 7 '.
  • no turbulence inserts 28 are arranged in the bypass channel 3 formed by the stacking disks 7, 7 ', so that a throughflow without or with only a slight pressure drop is possible.
  • the surrounding coolant channels 27 are not flowed through by coolant, whereby a heat-insulating air gap 15 remains here as well. This can be achieved by blocking an input of the respective coolant channels 27.
  • the advantage of this solution is the reduced variety of parts. Due to the higher number of stacking disks 7, 7 ', their unit price can be reduced.

Landscapes

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

Claims (6)

  1. Échangeur de chaleur de gaz d'échappement (1)
    - avec une zone d'échangeur de chaleur (2),
    - avec un canal de dérivation (3) entourant la zone d'échangeur de chaleur (2),
    - avec une soupape de dérivation (4) qui, selon sa position, divise un flux de gaz d'échappement (5) entre la zone d'échangeur de chaleur (2) et le canal de dérivation (3),
    - dans lequel un refroidisseur à plaques empilées (6) muni de plusieurs plaques empilées (7, 7') est agencé dans la zone d'échangeur de chaleur (2),
    et
    le canal de dérivation (3) est placé, en particulier brasé, sur une plaque empilée extérieure (7') du refroidisseur à plaques empilées (6), caractérisé en ce que
    - il est prévu un profilé en U (19) qui est assemblé à la plaque empilée extérieure (7') et qui forme avec celle-ci le canal de dérivation (3), dans lequel le profilé en U (19) comporte de petites traverses (20) au niveau de ses branches de U afin de pouvoir former une meilleure surface de brasage vers la plaque empilée extérieure (7').
  2. Échangeur de chaleur de gaz d'échappement selon la revendication 1,
    caractérisé en ce que,
    du côté des extrémités longitudinales, le canal de dérivation (3) et le refroidisseur à plaques empilées (6) sont intégrés dans un diffuseur (11) ou sont liés à une bride (12), en particulier sont brasés avec celle-ci.
  3. Échangeur de chaleur de gaz d'échappement selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    des pièces intercalées à turbulences (28), en particulier des structures de nervures ou de grilles, sont agencées entre des plaques empilées (7, 7') individuelles.
  4. Échangeur de chaleur de gaz d'échappement selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    chaque plaque empilée (7, 7') est composée d'un premier et d'un deuxième élément (21, 22).
  5. Échangeur de chaleur de gaz d'échappement selon la revendication 4,
    caractérisé en ce que
    - le premier élément (21) est réalisé en forme de U et comporte des nervures intérieures (23) saillantes,
    - le deuxième élément (22) est réalisé en forme de cuve avec un fond de cuve (24) et des bords de cuve (25), les nervures intérieures (23) s'appuyant contre le fond de cuve (24) et étant en particulier assemblées à celui-ci, par exemple brasées, lorsque la plaque empilée (7, 7') est montée.
  6. Moteur à combustion interne (8) avec au moins un échangeur de chaleur de gaz d'échappement (1) selon l'une quelconque des revendications précédentes.
EP17151774.1A 2016-02-03 2017-01-17 Échangeur thermique de gaz d'échappement Not-in-force EP3203173B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201631003783 2016-02-03

Publications (2)

Publication Number Publication Date
EP3203173A1 EP3203173A1 (fr) 2017-08-09
EP3203173B1 true EP3203173B1 (fr) 2018-12-26

Family

ID=57838227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17151774.1A Not-in-force EP3203173B1 (fr) 2016-02-03 2017-01-17 Échangeur thermique de gaz d'échappement

Country Status (1)

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EP (1) EP3203173B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4212812B1 (fr) 2022-01-14 2024-10-30 Valeo Autosystemy SP. Z.O.O. Échangeur de chaleur pour le refroidissement de l'air

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020118119A1 (de) * 2020-07-09 2021-03-11 Audi Aktiengesellschaft Wärmeübertrageranordnung, Verfahren zum Betreiben einer Wärmeübertrageranordnung sowie Antriebseinrichtung für ein Kraftfahrzeug

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142539A1 (de) 2001-08-30 2003-03-20 Behr Gmbh & Co Abgaswärmeübertrager
DE10346250B4 (de) * 2003-10-06 2018-01-04 Bayerische Motoren Werke Aktiengesellschaft Abgaskühler mit einem Bypass
DE102006033313A1 (de) 2005-07-19 2007-03-29 Behr Gmbh & Co. Kg Wärmeübertrager
DE102008014170A1 (de) 2007-05-30 2008-12-04 Behr Gmbh & Co. Kg Wärmetauscher und Baueinheit mit einem Wärmetauscher
EP2766687B1 (fr) * 2011-09-09 2019-04-24 Dana Canada Corporation Dispositif de récupération des gaz d'échappement à plaques empilées
US20140251579A1 (en) * 2013-03-05 2014-09-11 Wescast Industries, Inc. Heat recovery system and heat exchanger
DE102014222158A1 (de) 2014-10-30 2016-05-04 Mahle International Gmbh Abgaswärmeübertrager

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4212812B1 (fr) 2022-01-14 2024-10-30 Valeo Autosystemy SP. Z.O.O. Échangeur de chaleur pour le refroidissement de l'air

Also Published As

Publication number Publication date
EP3203173A1 (fr) 2017-08-09

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