EP2998684B1 - Procede d'introduction d'un liquide de refroidissement dans un echangeur thermique, de preference pour un refroidisseur de gaz d'echappement d'un moteur a combustion interne d'un vehicule automobile - Google Patents

Procede d'introduction d'un liquide de refroidissement dans un echangeur thermique, de preference pour un refroidisseur de gaz d'echappement d'un moteur a combustion interne d'un vehicule automobile Download PDF

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Publication number
EP2998684B1
EP2998684B1 EP15184620.1A EP15184620A EP2998684B1 EP 2998684 B1 EP2998684 B1 EP 2998684B1 EP 15184620 A EP15184620 A EP 15184620A EP 2998684 B1 EP2998684 B1 EP 2998684B1
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EP
European Patent Office
Prior art keywords
coolant
flow
heat exchanger
connecting stub
directing device
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
EP15184620.1A
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German (de)
English (en)
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EP2998684A1 (fr
Inventor
Jens Holdenried
Cecilia Marola
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
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Mahle International GmbH
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Publication date
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Publication of EP2998684A1 publication Critical patent/EP2998684A1/fr
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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
    • 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
    • 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
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • F28F9/0258—Arrangements for coupling connectors with flow lines of quick acting type, e.g. with snap action
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid

Definitions

  • the invention relates to a device for supplying a coolant to a heat exchanger, preferably for an exhaust gas cooler of an internal combustion engine of a motor vehicle, comprising a connecting piece.
  • Exhaust coolers as used in motor vehicles, have the task of cooling hot exhaust gas from internal combustion engines, so that this cooled exhaust gas can be mixed back into the intake air. So that the thermodynamic efficiency of the internal combustion engine does not sink too much, a cooling to a low level is desirable.
  • This principle is commonly known as cooled exhaust gas recirculation and is used to achieve a reduction of pollutants in the exhaust gas.
  • the coolant Due to very high exhaust gas temperatures of the internal combustion engine, the coolant, especially in the area directly behind the gas inlet of the Exhaust gas cooler come to a boil, which can have a negative impact on the life of the exhaust gas cooler. The boiling risk can be counteracted to a limited extent by increasing the coolant throughput. Technically, however, the amount of coolant flowing through the exhaust gas cooler is limited by the coolant-side flow resistance of the exhaust gas cooler.
  • a device according to the preamble of claim 1 is known with a system of a valve and a protective cap, in which the valve is connected at one end to a line of a closed fluid circuit.
  • a sealing body is arranged between the valve and the protective cap in order to prevent the penetration of dirt particles into the coolant.
  • the DE 10 2012 221 325 A1 discloses a winding head cooling, wherein two cooling circuit components, which cool an electric machine, are connected by means of a so-called plug and seal element.
  • DE 1815047 discloses a device for separating gas bubbles from the coolant flow of a liquid-cooled nuclear reactor with a flow guide for the coolant.
  • An embodiment of the invention relates to a device for supplying a coolant in a heat exchanger, preferably in an exhaust gas cooler of an internal combustion engine of a motor vehicle and a Connecting piece, wherein in the interior of the connecting piece a projection-like designed Strömungsleit adopted for the coolant is integrated.
  • the connecting piece is advantageously designed as a so-called plug and seal element for use in a coolant connection.
  • the flow-guiding device is formed approximately centrally on the inner wall, protruding into an inner space of the connecting piece, with a contour of the flow-guiding device rising in the longitudinal direction of the connecting piece in the direction of the heat exchanger.
  • a ski-shaped flow guiding device which terminates on both sides with the connecting piece, generates a diversified coolant guide in the direction of the heat exchanger as well as to the sides within the connecting piece.
  • the acceleration of the flow is approximately constant and takes place approximately over the entire length of the connecting piece.
  • an axial rise of the contour of the flow guide in the direction of the heat exchanger is linear.
  • Such a linear increase of the integrated in the connecting piece flow guide allows constructive connection of a line that can be branched in several directions.
  • the axial rise of the contour of the flow guide in the direction of the heat exchanger according to a power function.
  • Such a course promotes the constant acceleration of the flow of the coolant and thus reduces the risk of boiling the coolant.
  • the axial rise of the contour of the flow guide parabolic.
  • the contour of the flow guide in the radial direction of the connecting piece is formed approximately mirror-symmetrical, on both sides to a centrally formed maximum is followed by a curvature to the inner wall of the connecting piece.
  • the respective curvature runs from the maximum of the flow concave concave to the inner wall of the connecting piece.
  • a connecting piece in a coolant connection allows a particularly space-efficient and optimized connection to the exhaust gas cooler without additional hoses or pipes directly to the internal combustion engine.
  • the radial alignment of the contour of the flow-guiding device is dependent on a width of the Fluid circuit containing block determined.
  • connection piece has an approximately round cross-section and is arranged directly on the heat exchanger.
  • FIG. 1 shows an inlet region for exhaust gas and coolant of an exhaust gas cooler 1, as used in internal combustion engines, preferably diesel engines, in motor vehicles to cool the hot exhaust gas emitted from the internal combustion engine, so that this cooled exhaust gas can be added to the intake air of the internal combustion engine again.
  • an exhaust gas cooler 1 consists of a diffuser 2, to which a radiator block 3 is connected.
  • a coolant port 5 is fixed, through which a coolant is introduced into the radiator block 3 to the tubes 4, through which the hot exhaust gas flows to cool.
  • the coolant connection 5 is opposite to the radiator block 3 connected to a line not shown.
  • connection piece 6 for example, as a plug and seal element, clamped.
  • a connection piece 6 is not simply plugged into the coolant connection 5 on the radiator block 3 of the exhaust gas cooler 1, but advantageously and optionally also formed self-sealing, so that no coolant can escape.
  • the connecting piece 6 has a round cross section and contains at its Inner wall 7 a flow guide 8.
  • the flow guide 8 is designed similar to a projection, and has a maximum in the center 9, which projects into the interior 10 of the connecting piece 6. Starting from the maximum 9, the flow-guiding device 8 has radially formed bulges 11, 12, which extend to the inner wall of the connecting piece 6. These bulges 11, 12 are formed symmetrically to the maximum 9 and are concave.
  • a section AA of the exhaust gas cooler 1 is in Fig. 2 shown. It can be seen that the coolant connection 5 encloses the connecting piece 6, wherein the flow guide 8 in its axial extent 13, starting from the radiator block 3 of the exhaust gas cooler 1 to the coolant port 5, which is arranged on the internal combustion engine, preferably on the cylinder head of the internal combustion engine, a parabolic Contour, which decreases from the radiator block 3 to the coolant port 5.
  • the maximum 9 represents the highest elevation of the flow guide 8, wherein the bulges 11, 12 of the flow guide 8, starting from the radiator block 3 to the coolant connection 5, drop.
  • the flow guide 8 is optimized in its radial orientation so that a certain ratio of the width of the coolant block 3 is given to its average width, always to ensure an optimal flow rate of the coolant to the gas flow rate of the exhaust gas cooler 1 and ensure that only a minimal Coolant needs to be provided to prevent the boiling of the coolant.
  • Fig. 4 shows an adjustment of the radial average width of the flow guide 8 to the block width of the coolant block 3 of approximately 3.
  • Fig. 5 is the coolant distribution adapted to the width of the coolant block 3 in that the block width to the average width of the flow guide 8 is about 2, while at Fig. 6 the block width to the average width is approximately 5.
  • the connecting piece 6 is designed so that it extends together with the flow guide 8 approximately to the inner edge of a housing 14 of the coolant block 3 and extends at maximum axial displacement to 2 mm in front of the inner edge of the housing 14.
  • the solution described shows a retrofittable coolant connection, in which a flow guide is integrated, which allows compensation of manufacturing tolerances and thermal expansions. The effect depends on the respective intrusion of the flow guide 8 into the connecting piece 6.

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)

Claims (8)

  1. Dispositif servant à fournir un liquide de refroidissement dans un échangeur de chaleur, de préférence dans un refroidisseur de gaz d'échappement d'un moteur à combustion interne d'un véhicule automobile, ledit dispositif comprenant une tubulure de raccordement (6), caractérisé en ce que la tubulure de raccordement est configurée pour être introduite dans un raccord de liquide de refroidissement (5), où, à l'intérieur de la tubulure de raccordement, est intégré un dispositif de guidage d'écoulement (8) pour le liquide de refroidissement, ledit dispositif de guidage étant configuré de façon saillante, où le dispositif de guidage d'écoulement (8), en pénétrant dans un espace intérieur (10) de la tubulure de raccordement (6), est configuré presque au milieu de la paroi intérieure, et un contour du dispositif de guidage d'écoulement (8) formé dans une direction d'étendue longitudinale (13) de la tubulure de raccordement (6) s'étend de manière ascendante en direction de l'échangeur de chaleur, où le contour du dispositif de guidage d'écoulement (8) formé dans la direction radiale de la tubulure de raccordement (6) est configuré en étant presque symétrique par effet miroir, où, des deux côtés, une partie bombée (11, 12) se raccorde à chaque fois à la paroi intérieure (7) de la tubulure de raccordement (6), ledit raccordement se produisant par rapport à un maximum (9) configuré au milieu.
  2. Dispositif selon la revendication 1, caractérisé en ce que la tubulure de raccordement est conçue comme un élément à bouchon d'étanchéité.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'une montée axiale du contour du dispositif de guidage d'écoulement (8) se produit de façon linéaire en direction de l'échangeur de chaleur.
  4. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la montée axiale du contour du dispositif de guidage d'écoulement (8) se produisant en direction de l'échangeur de chaleur s'étend au moins presque conformément à une fonction puissance.
  5. Dispositif selon la revendication 4, caractérisé en ce que la montée axiale du contour du dispositif de guidage d'écoulement (8) s'étend en forme de parabole.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la partie bombée respective (11, 12) s'étend, à partir du maximum (9) du dispositif de guidage d'écoulement (8), en étant concave par rapport à la paroi intérieure (7) de la tubulure de raccordement (6).
  7. Dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'orientation radiale du contour du dispositif de guidage d'écoulement (8) est déterminée en fonction d'une largeur du bloc (3) de l'échangeur de chaleur.
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la tubulure de raccordement (6) présente une section de forme circulaire ou presque ronde et est introduite dans le raccord de liquide de refroidissement (5).
EP15184620.1A 2014-09-22 2015-09-10 Procede d'introduction d'un liquide de refroidissement dans un echangeur thermique, de preference pour un refroidisseur de gaz d'echappement d'un moteur a combustion interne d'un vehicule automobile Active EP2998684B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014219078.9A DE102014219078A1 (de) 2014-09-22 2014-09-22 Vorrichtung zur Zuführung eines Kühlmittels zu einem Wärmeübertrager, vorzugsweise für einen Abgaskühler eines Verbrennungsmotors eines Kraftfahrzeuges

Publications (2)

Publication Number Publication Date
EP2998684A1 EP2998684A1 (fr) 2016-03-23
EP2998684B1 true EP2998684B1 (fr) 2019-11-06

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Family Applications (1)

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EP15184620.1A Active EP2998684B1 (fr) 2014-09-22 2015-09-10 Procede d'introduction d'un liquide de refroidissement dans un echangeur thermique, de preference pour un refroidisseur de gaz d'echappement d'un moteur a combustion interne d'un vehicule automobile

Country Status (4)

Country Link
US (1) US9708944B2 (fr)
EP (1) EP2998684B1 (fr)
JP (1) JP2016070654A (fr)
DE (1) DE102014219078A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017218254A1 (de) * 2017-10-12 2019-04-18 Mahle International Gmbh Abgaswärmeübertrager
US20190346216A1 (en) * 2018-05-08 2019-11-14 United Technologies Corporation Swirling feed tube for heat exchanger

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DE1815047U (de) * 1960-03-11 1960-07-21 Beteiligungs & Patentverw Gmbh Aus blechgefertigter aufbau fuer lokomotiven.
US4071403A (en) 1974-08-01 1978-01-31 Westinghouse Electric Corporation Method and apparatus for protecting the core of a nuclear reactor
DE29714361U1 (de) * 1996-08-05 1997-12-04 Vaillant Joh Gmbh & Co Schichtenspeicher
ATE385540T1 (de) * 2002-05-15 2008-02-15 Behr Gmbh & Co Kg Abgaswärmetauscher mit ventil
DE102004027479B3 (de) 2004-06-04 2005-09-08 Contitech Kühner Gmbh & Cie. Kg System aus einem Ventil und einer Schutzkappe
DE102005042315A1 (de) * 2005-09-06 2007-03-08 Behr Gmbh & Co. Kg Kühlmittelkühler, insbesondere für ein Kraftfahrzeug
DE102006051000A1 (de) * 2005-10-26 2007-07-12 Behr Gmbh & Co. Kg Wärmetauscher, Verfahren zur Herstellung eines Wärmetauschers
JP2007218455A (ja) * 2006-02-14 2007-08-30 Denso Corp 熱交換器
KR100748756B1 (ko) * 2006-05-11 2007-08-13 현대자동차주식회사 차량용 ｅｇｒ 장치의 ｅｇｒ 쿨러
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JP5988296B2 (ja) * 2011-08-10 2016-09-07 臼井国際産業株式会社 多管式熱交換器
EP2728155A1 (fr) * 2012-11-06 2014-05-07 BorgWarner Inc. Dispositif d'échange de chaleur pour échanger de la chaleur entre des fluides
DE102012221325A1 (de) 2012-11-22 2014-05-22 Robert Bosch Gmbh Neuartige Wickelkopf-Kühlung
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Also Published As

Publication number Publication date
DE102014219078A1 (de) 2016-03-24
US9708944B2 (en) 2017-07-18
JP2016070654A (ja) 2016-05-09
US20160084128A1 (en) 2016-03-24
EP2998684A1 (fr) 2016-03-23

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