EP3108194B1 - Caloporteur de gaz d'échappement - Google Patents

Caloporteur de gaz d'échappement Download PDF

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Publication number
EP3108194B1
EP3108194B1 EP15703771.4A EP15703771A EP3108194B1 EP 3108194 B1 EP3108194 B1 EP 3108194B1 EP 15703771 A EP15703771 A EP 15703771A EP 3108194 B1 EP3108194 B1 EP 3108194B1
Authority
EP
European Patent Office
Prior art keywords
coolant
flow guide
flow
exhaust gas
housing
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
EP15703771.4A
Other languages
German (de)
English (en)
Other versions
EP3108194A1 (fr
Inventor
Wolfgang Bucher
Jürgen Steimer
Jens Ruckwied
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 Behr GmbH and Co KG
Original Assignee
Mahle Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Mahle Behr GmbH and Co KG
Publication of EP3108194A1 publication Critical patent/EP3108194A1/fr
Application granted granted Critical
Publication of EP3108194B1 publication Critical patent/EP3108194B1/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
    • 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
    • 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
    • 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
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • 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
    • F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
    • 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 an exhaust gas heat exchanger according to the preamble of claim 1.
  • exhaust gas coolers are used in this context, which are thermally loaded to a high degree by the combustion exhaust gases introduced. The latter can reach temperatures of up to 700 ° C. during operation of the internal combustion engine.
  • an exhaust heat exchanger with a tube bundle with exhaust pipes, said selbiges tube bundle input and output side is taken in each case in a soil.
  • the tube bundle is surrounded by a through-flow of coolant housing, which thus encloses the tube bundle and the end face is bounded by the two floors.
  • a coolant inlet and a coolant outlet are provided for coolant supply and removal.
  • exhaust gas heat exchangers are for example from US 2003/0010479 A1 as well as from the CN 201884117 U known.
  • the known exhaust gas heat exchanger moreover has a housing through which flows a coolant, which encloses the tube bundle, is delimited on the face side by the two floors and has a coolant inlet and a coolant outlet. In the area of the coolant inlet, a flow-guiding device is provided, which directs the coolant to boiling-endangered areas of the housing.
  • an exhaust heat exchanger with a tube bundle with exhaust pipes, the tube bundle is taken on the input side and the output side in each case in a soil.
  • a through-flowed by the coolant housing is provided, which encloses the tube bundle and is connected to a cooling inlet and a coolant outlet.
  • a flow-guiding device is provided, which directs the coolant to boiling-endangered points of the housing and at the same time imposes a change of direction on the coolant flow.
  • JP-A-2013053620 discloses an exhaust heat exchanger according to the preamble of claim 1.
  • the inflowing coolant flows in a predetermined pipe direction into the housing and is distributed undefined.
  • Coolant inlet usually not be mounted directly in the region of the bottom, so that the coolant has the natural tendency to flow away from the primarily to be cooled floor.
  • the hot combustion exhaust gas is introduced into the tube bundle, so that there is the danger of local boiling especially in this area.
  • the present invention addresses the problem of providing an improved embodiment for an exhaust gas heat exchanger of the generic type, which in particular prevents or at least minimizes the risk of local boiling.
  • the present invention is based on the general idea of directing a coolant flow to be introduced into an exhaust gas heat exchanger by means of a corresponding flow directing device to boiling points and thereby achieving optimum cooling in these areas and at the same time the risk of local boiling, which increases in these areas, at least reduce.
  • the exhaust gas heat exchanger according to the invention has a tube bundle with exhaust-carrying pipes, which is taken on the input side and output side each in a bottom.
  • the tube bundle is enclosed by a housing through which coolant flows, which end face is bounded by the two floors and has a coolant inlet and a coolant outlet.
  • a diffuser is usually provided, which supplies the hot exhaust gases emitted by the internal combustion engine.
  • a flow-guiding device is arranged in the area of the coolant inlet, which is the coolant at siedegefährdete points of the housing, namely on the input side ground, directs and there provides a locally enhanced cooling.
  • the at least one flow guide is designed, in particular shaped or
  • the exhaust gas heat exchanger can be cooled with significantly reduced coolant flow, whereby, for example, a pump capacity and a flow rate of coolant can be reduced.
  • the flow-guiding device is arranged on a coolant tube which opens into the coolant inlet.
  • the arrangement of the flow guide outside of the actual exhaust gas heat exchanger offers the great advantage that its structural components, such as the housing, can remain unchanged. As a result, in particular complex changes in geometry in the housing tool can be avoided.
  • the flow guide is in turn arranged externally to the exhaust gas heat exchanger to a feed nozzle, which is connected to the coolant inlet.
  • the flow guide on the feed pipe applies mutatis mutandis to that described in the previous paragraph, so that in this case, the flow can either be integrally formed with the feed, in particular in the manner of a metallic casting, or is subsequently connected thereto.
  • the flow guide may for example be formed integrally with the coolant tube or separately welded to this and with this, soldered or screwed.
  • the one-piece design offers the great advantage that the coolant tube and the flow guide can be made as a metallic casting, whereby the provision of Strömungsleitleaned invention requires only a single conversion of the casting tool for the coolant pipe.
  • the manufacturing flexibility increases, so that coolant tubes for different exhaust-gas heat exchangers can be equipped with different flow-guiding devices.
  • the flow-guiding device has at least one flow-guiding element, which is adjustable or pivotable.
  • an adjustable or pivotable flow-guiding element can either be actively adjusted, for example by means of a corresponding adjusting device, or passively, for example as a function of a flow pulse of the coolant.
  • the flow guide is pivotally mounted and biased by a spring in a first end position.
  • the flow guide element is now adjustable against the spring force up to a second end position.
  • the flow guide element is particularly advantageous, instead of the spring, to design the flow guide element as a spring plate and / or as a bent sheet-metal element under prestressing, which is connected on one side to the inner wall of the coolant connection and which bends depending on the flow impulse.
  • An exhaust gas heat exchanger 1 according to the invention has a tube bundle 2 with exhaust-carrying tubes 3, wherein the tube bundle 2 is gripped on the input side and on the output side respectively in a bottom 4, 5.
  • the exhaust gas heat exchanger 1 according to the invention has a housing 7, which flows through a coolant 6 and encloses the tube bundle 2 and is delimited by the two floors 4, 5.
  • the housing 7 has a coolant inlet 8 and a coolant outlet 9.
  • a flow-guiding device 10 is now arranged in the region of the coolant inlet 8 with a flow-guiding element 11, which seals the coolant 6 at siede-vulnerable points of the housing 7, namely in this case at the input-side bottom 4.
  • the flow guide 10 and the flow guide 11 are disposed on a coolant pipe 14, which opens into the coolant inlet 8.
  • the flow guide 11 protrudes into the housing 7 of the exhaust gas heat exchanger 1 and causes the required deflection of the coolant flow 6 in the direction of the input side Soil 4, whereby this effectively cooled and in particular the risk of local boiling can be minimized at least.
  • the flow-guiding device 10 and, with it, also the flow-guiding element 11 can be formed in one piece with the coolant tube 14, in particular if this is produced, for example, as a metallic casting.
  • the flow guide 10 or the flow guide 11 is made separately to the coolant tube 14 and then connected to this, for example clipped, glued, welded, soldered or pressed.
  • the flow guide 11 is formed separately from the coolant pipe 14 and inserted via a nose 15 in a corresponding opening 16 provided on the coolant pipe 14. Due to the complementary design of the opening 16 and the associated nose 15 on the flow guide 11, an exact alignment of the flow guide 11 can already be enforced. A fixation of the same on the coolant tube 14 can be done for example by the above-described soldering or welding. Of course, alternatively, a pressing of the nose 15 in the opening 16 is conceivable.
  • the flow guide 11 may be formed in particular groove-shaped, as shown in the illustrations in the Fig. 3 can be seen.
  • the flow guide 11 has an engagement length L between 2.0 and 30 mm, more preferably an engagement length L between 2.0 and 10 mm. About this engagement length engages the flow guide 11 in the housing 7 of the exhaust gas heat exchanger 1 (see, in particular Fig. 2 ).
  • At least one flow guide 11 is adjustable or pivotable, here about an axis A pivotable.
  • a not shown adjusting device may be used, which causes an active adjustment of the flow guide 11.
  • the flow guide 11 is pivotally mounted and by means of a spring 17 in a first end position (see. Fig. 4a ) is biased.
  • the flow guide 11 in response to the flow pulse of the coolant 6 against the spring force of the spring 17 to one in accordance with the Fig. 4b illustrated second end position adjustable.
  • Such a possibility of adjustment offers the great advantage that at a low coolant volume flow optimum flow and thus cooling of the input side bottom 4 can be achieved, whereas at a high coolant volume flow limitation of the pressure loss is achieved by dodging the pivotally mounted flow guide 11.
  • the flow guide 11 is connected on one side to the coolant tube 14 and adjustable depending on the flow impulse between a first and second end position. It is thus not pivotable about the axis A, but can only be bent due to its resilient design in response to the flow pulse of the coolant 6.
  • the flow guide 11 is thus formed in the manner of a unilaterally connected spring plate.
  • Such a flow guide 10 can dispense entirely with the spring 17 and is therefore particularly preferred.
  • This embodiment also offers the great advantage that, given a low coolant volume flow, optimal flow and thus cooling of the input-side bottom 4 can be achieved, whereas with a high coolant volume flow limitation of the pressure loss through elastic bending of the unilaterally connected flow guide 11 is achieved.
  • Such a resilient flow-guiding element 11 can be produced relatively simply and inexpensively as a stamped sheet metal part and is therefore predestined for use in the exhaust gas heat exchanger 1 according to the invention.
  • the shape of the flow-directing element 11 or the material can directly influence the force to be bent, so that the flow is comparatively easily adjustable via these parameters.
  • a connection of the flow guide 11 to the coolant tube 14 can be done in a simple manner cohesively, for example by means of welding or soldering, with a gluing or other mechanical connection, such as clipping or pressing are conceivable. Especially the latter are advantageous because there is no heat input and therefore no delay is to be feared.
  • the flow guide element 11 inserted into the feed pipe 18 can have an almost arbitrary opening angle ⁇ and any desired orientation.
  • the opening angle ⁇ is to be adapted in terms of its size and orientation to a corresponding application, wherein the opening angle ⁇ can be between 90 and 310 °, in particular between 140 ° and 230 °.
  • the flow guide 11 may have additional, not shown openings for targeted regulation of the outflow and the amount of the coolant 6. These openings can also be designed as slots and / or holes.
  • a change in direction of the coolant flow 6 upon entry into the housing 7 can be forced, wherein the change in direction between 0 ° ⁇ ⁇ 90 °, preferably between 15 ° ⁇ ⁇ 42 °.
  • the length L of the flow guide 11 may be 2mm ⁇ L ⁇ 30mm, in particular 2mm ⁇ L ⁇ 10mm.
  • a directed flow of coolant within the housing 7 can be forced, whereby in particular areas susceptible to boiling, such as the ground 4 on the input side, can be better cooled. Due to the better cooling of the bottom 4, the life of the exhaust gas heat exchanger 1 according to the invention can be increased. Due to the fact that the flow guiding device 10 is arranged, for example, in the coolant pipe 14 or in the feed pipe 18, the housing 7 of the exhaust gas heat exchanger 1 can remain unchanged, so that the same tools can continue to be used for the production.

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (5)

  1. Échangeur de chaleur de gaz d'échappement (1)
    - avec un faisceau de tubes (2) avec des tubes véhiculant des gaz d'échappement (3), dans lequel le faisceau de tubes (2) est contenu côté entrée et côté sortie respectivement dans un fond (4, 5),
    - avec un boîtier (7) traversé par un agent de refroidissement (6), qui renferme le faisceau de tubes (2), est délimité côté frontal par les deux fonds (4, 5) et présente une entrée d'agent de refroidissement (8) et une sortie d'agent de refroidissement (9),
    - dans lequel un dispositif de guidage d'écoulement (10), qui dirige l'agent de refroidissement (6) à des endroits à risque d'ébullition du boîtier (7), à savoir au fond côté entrée (4), est prévu dans la zone de l'entrée d'agent de refroidissement (8),
    - dans lequel le dispositif de guidage d'écoulement (10) présente au moins un élément de guidage d'écoulement (11),
    - dans lequel l'au moins un élément de guidage d'écoulement (11) est réalisé de sorte qu'il oblige un changement de direction de l'écoulement d'agent de refroidissement (6) d'environ 0° < α < 90°, en particulier d'environ 15° < α < 42°,
    - dans lequel le dispositif de guidage d'écoulement (10) est agencé au niveau d'un tube d'agent de refroidissement (14), qui débouche dans l'entrée d'agent de refroidissement (8), ou
    - dans lequel le dispositif de guidage d'écoulement (10) est agencé au niveau d'une tubulure d'alimentation (18), qui est reliée à l'entrée d'agent de refroidissement (8),
    caractérisé en ce
    - que l'au moins un élément de guidage d'écoulement (11) est réalisé de manière élastiquement déformable et/ou pivotante,
    - que l'élément de guidage d'écoulement (11) est attaché d'un côté au tube d'agent de refroidissement (14), réalisé à la manière d'une tôle à ressort et réglable en fonction de l'impulsion d'écoulement entre une première et deuxième position finale, ou
    - que l'élément de guidage d'écoulement (11) est logé de manière pivotante et précontraint au moyen d'un ressort (17) dans une première position finale et réglable en fonction de l'impulsion d'écoulement de l'agent de refroidissement (6) à l'encontre du ressort (17) jusque dans une deuxième position finale.
  2. Échangeur de chaleur de gaz d'échappement selon la revendication 1, première variante du préambule,
    caractérisé en ce
    que le dispositif de guidage d'écoulement (10) est réalisé d'un seul tenant avec le tube d'agent de refroidissement (14) ou est soudé, brasé ou vissé avec celui-ci.
  3. Échangeur de chaleur de gaz d'échappement selon la revendication 1, première variante du préambule ou selon la revendication 2
    caractérisé en ce
    que le tube d'agent de refroidissement (14) et le dispositif de guidage d'écoulement (10) sont réalisés en tant que pièce coulée métallique.
  4. Échangeur de chaleur de gaz d'échappement selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que le dispositif de guidage d'écoulement (10) présente au moins un élément de guidage d'écoulement (11), qui est réalisé en forme de gouttière.
  5. Échangeur de chaleur de gaz d'échappement selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'au moins un élément de guidage d'écoulement (11) présente une longueur de prise de 2,0 mm < L < 30,0 mm, en particulier une longueur d'environ 2,0 mm < L < 10,0 mm, sur laquelle il entre en prise dans le boîtier (7).
EP15703771.4A 2014-02-11 2015-02-05 Caloporteur de gaz d'échappement Not-in-force EP3108194B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014202447.1A DE102014202447A1 (de) 2014-02-11 2014-02-11 Abgaswärmeübertrager
PCT/EP2015/052426 WO2015121148A1 (fr) 2014-02-11 2015-02-05 Caloporteur de gaz d'échappement

Publications (2)

Publication Number Publication Date
EP3108194A1 EP3108194A1 (fr) 2016-12-28
EP3108194B1 true EP3108194B1 (fr) 2018-05-02

Family

ID=52465362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15703771.4A Not-in-force EP3108194B1 (fr) 2014-02-11 2015-02-05 Caloporteur de gaz d'échappement

Country Status (3)

Country Link
EP (1) EP3108194B1 (fr)
DE (1) DE102014202447A1 (fr)
WO (1) WO2015121148A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014219078A1 (de) * 2014-09-22 2016-03-24 Mahle International Gmbh Vorrichtung zur Zuführung eines Kühlmittels zu einem Wärmeübertrager, vorzugsweise für einen Abgaskühler eines Verbrennungsmotors eines Kraftfahrzeuges
DE102014226883A1 (de) * 2014-12-22 2016-06-23 Mahle International Gmbh Wärmeübertrager
ES2632687B1 (es) * 2016-03-14 2018-06-25 Valeo Térmico, S. A. Intercambiador de calor para gases, en especial de los gases de escape de un motor
EP3246647B1 (fr) 2016-05-19 2019-10-30 Borgwarner Emissions Systems Spain, S.L.U. Dispositif d'échange de chaleur
EP3309381B1 (fr) * 2016-10-13 2020-03-04 Mahle International GmbH Refroidisseur de gaz d'échappement récirculés pour un moteur à combustion interne
EP3309494B1 (fr) 2016-10-13 2021-04-28 HS Marston Aerospace Limited Échangeur de chaleur
DE102017206201A1 (de) 2016-10-13 2018-04-19 Mahle International Gmbh Abgasrückführkühler für eine Brennkraftmaschine
DE102017218254A1 (de) * 2017-10-12 2019-04-18 Mahle International Gmbh Abgaswärmeübertrager
EP3786567A1 (fr) * 2019-08-26 2021-03-03 Valeo Termico S.A. Refroidisseur egr
EP3786562B1 (fr) * 2019-08-28 2023-03-29 Valeo Termico S.A. Refroidisseur à recirculation de gaz d'échappement

Citations (3)

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JPH1113550A (ja) * 1997-06-23 1999-01-19 Isuzu Motors Ltd Ｅｇｒクーラ
DE102010012192A1 (de) * 2010-03-19 2011-09-22 Pierburg Gmbh Kühlmitteleinlassstutzen für einen Wärmetauscher
JP2013053620A (ja) * 2011-08-10 2013-03-21 Usui Kokusai Sangyo Kaisha Ltd 多管式熱交換器

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US5732688A (en) * 1996-12-11 1998-03-31 Cummins Engine Company, Inc. System for controlling recirculated exhaust gas temperature in an internal combustion engine
JPH1113549A (ja) * 1997-06-23 1999-01-19 Isuzu Motors Ltd Ｅｇｒクーラ
FR2792968B1 (fr) * 1999-04-29 2001-06-29 Westaflex Automobile Echangeur thermique en plastique et acier destine a etre dispose dans un circuit d'admission d'air d'un moteur, notamment dans un repartiteur comportant deux chambres et element du circuit d'admission d'air d'un moteur
US7077190B2 (en) 2001-07-10 2006-07-18 Denso Corporation Exhaust gas heat exchanger
ATE385540T1 (de) * 2002-05-15 2008-02-15 Behr Gmbh & Co Kg Abgaswärmetauscher mit ventil
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CA2443496C (fr) * 2003-09-30 2011-10-11 Dana Canada Corporation Echangeurs de chaleur a faisceau comprenant des tubes a extremite de section elargie
DE20316688U1 (de) * 2003-10-29 2004-03-11 Behr Gmbh & Co. Kg Wärmetauscher
CN201884117U (zh) 2010-12-22 2011-06-29 中国重汽集团济南动力有限公司 发动机用egr冷却器
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Publication number Priority date Publication date Assignee Title
JPH1113550A (ja) * 1997-06-23 1999-01-19 Isuzu Motors Ltd Ｅｇｒクーラ
DE102010012192A1 (de) * 2010-03-19 2011-09-22 Pierburg Gmbh Kühlmitteleinlassstutzen für einen Wärmetauscher
JP2013053620A (ja) * 2011-08-10 2013-03-21 Usui Kokusai Sangyo Kaisha Ltd 多管式熱交換器

Also Published As

Publication number Publication date
EP3108194A1 (fr) 2016-12-28
WO2015121148A1 (fr) 2015-08-20
DE102014202447A1 (de) 2015-08-13

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