WO2006122675A1 - Dispositif de refroidissement de gaz d'echappement recycles - Google Patents

Dispositif de refroidissement de gaz d'echappement recycles Download PDF

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Publication number
WO2006122675A1
WO2006122675A1 PCT/EP2006/004310 EP2006004310W WO2006122675A1 WO 2006122675 A1 WO2006122675 A1 WO 2006122675A1 EP 2006004310 W EP2006004310 W EP 2006004310W WO 2006122675 A1 WO2006122675 A1 WO 2006122675A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant
cooling device
diffuser
inlet
outlet
Prior art date
Application number
PCT/EP2006/004310
Other languages
German (de)
English (en)
Inventor
Walter Kerschbaum
Roland Mennicken
Götz VON ESEBECK
Original Assignee
Daimlerchrysler Ag
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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2006122675A1 publication Critical patent/WO2006122675A1/fr

Links

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
    • 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
    • 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
    • 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
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/029—Other particular headers or end plates with increasing or decreasing cross-section, e.g. having conical shape

Definitions

  • the present invention relates to a cooling device for recirculated exhaust gases of an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1.
  • a cooling device which preferably serves for the cooling of exhaust gases.
  • the known cooling device has a heat exchanger which contains an exhaust gas path and a coolant path coupled therewith in a heat-transmitting manner.
  • the known cooling device has an inlet diffuser which connects an exhaust gas inlet of the cooling device to an inlet of the exhaust gas path, and an outlet diffuser which connects an outlet of the exhaust gas path to an exhaust gas outlet of the cooling device.
  • the inlet diffuser is also provided with an inlet port and an outlet port, wherein the inlet port and the outlet port are connected to the coolant passage of the inlet diffuser.
  • the coolant channel of the inlet diffuser is thus completely decoupled from the coolant path of the heat exchanger.
  • Further cooling devices are known from DE 103 12 788 A1 and from DE-PS 1 551 553.
  • the present invention is concerned with the problem of providing for a cooling device of the type mentioned an improved embodiment, which is characterized in particular by a compact design.
  • the invention is based on the general idea of fluidly connecting the coolant channel arranged in the diffuser to the coolant path of the heat exchanger. This results in an integrated coolant guide within the cooling device, whereby additional connections can be omitted.
  • the cooling device thereby builds compact and can be realized comparatively inexpensive.
  • the diffuser can be connected via an axial plug connection to the heat exchanger, which connects the at least one coolant channel tightly to the coolant path and which connects the gas-conducting section of the diffuser tightly with the exhaust gas path.
  • a connector simplifies the installation of the cooling device.
  • it is particularly easy to achieve an axial connection between the coolant channel and the coolant path. As a result, for example, a 90 ° deflection, which occurs in a conventional radial connection piece omitted, whereby the flow resistance of the cooling device is reduced.
  • FIG. 2 shows a view as in FIG. 1 in the region of a diffuser, but in another embodiment, FIG. 3 is a greatly simplified cross-section through a diffuser according to section lines III in Fig. 1 and Fig. 2,
  • Fig. 4 is an enlarged view of a detail IV in the
  • a cooling device 1 according to the invention comprises a heat exchanger 2, an inlet diffuser 3 and an outlet diffuser 4.
  • the cooling device 1 is used for cooling recirculated exhaust gases of an internal combustion engine, which is arranged in particular in a motor vehicle.
  • the cooling device 1 is therefore installed in an only indicated here return power 5, which recirculates exhaust gases from an exhaust gas side of the internal combustion engine to a fresh air side of the internal combustion engine with active exhaust gas recirculation.
  • the recirculated exhaust gases are cooled by means of the cooling device 1.
  • the heat exchanger 2 includes an exhaust path 6 through which the exhaust gas to be cooled flows, and a coolant path 7 through which a coolant used for cooling the exhaust gas flows. Coolant path 7 and exhaust path 6 are coupled to each other to transmit heat.
  • the heat exchanger 2 is a plate heat exchanger that operates with plates stacked on top of each other.
  • the inlet diffuser 3 connects an exhaust gas inlet 8 of the cooling device 1 to an inlet 9 of the exhaust gas path 6.
  • the inlet diffuser 3 contains a section 10 leading the exhaust gas, which extends in the direction of flow of the exhaust gases having widening cross-section through.
  • the exhaust gas flow is symbolized by arrows 11.
  • the outlet diffuser 4 connects an outlet 12 of the exhaust gas path 6 to an exhaust gas outlet 13 of the cooling device 1.
  • the outlet diffuser 4 also has an exhaust gas-carrying section 14 which has a flow-through cross-section which is smaller in the flow direction of the exhaust gas flow 11.
  • At least one of the diffusers 3, 4 has a double wall 15 in the region of the exhaust-carrying section 10, 14.
  • both the inlet diffuser 3 and the outlet diffuser 4 have such a double wall 15.
  • At least one of the diffusers 3, 4 has at least one coolant channel 16 formed in the double wall 15 or formed by the double wall 15 itself. According to the invention, the respective coolant channel 16 is now connected to the coolant path 7. In this way, the coolant path 7 of the heat exchanger 2 is connected via the at least one coolant channel 16 of the at least one diffuser 3, 4 to an unspecified coolant circuit, which may be formed for example by a branch of an engine cooling circuit of the internal combustion engine.
  • both the inlet diffuser 3 and the outlet diffuser 4 are each provided with the double wall 15 and are each provided with at least one coolant channel 16.
  • the at least one coolant channel 16 of the outlet diffuser 4 connects at least one coolant inlet 17 of the cooling device 1 to at least one inlet 18 of the cooling device 1 Coolant paths 7.
  • the at least one coolant channel 16 of the inlet diffuser 3 connects at least one outlet 19 of the coolant path 7 with at least one coolant outlet 20 of the cooling device 1. In this way, cooling of the recirculated exhaust gas flow 11 results in the countercurrent principle.
  • the coolant inlet 17 is formed on the inlet diffuser 3, while the coolant outlet 20 is arranged on the outlet diffuser 4.
  • the cooling device 1 in another embodiment of the cooling device 1 it can be provided that only one of the diffusers 3, 4 contains the at least one coolant channel 16 connected to the coolant path 7.
  • the outlet diffuser 4 is shown by way of example for this purpose.
  • the respective diffuser in this case the outlet diffuser 4
  • at least one of these coolant channels 16 is connected to the at least one coolant inlet 17 of the cooling device 1 and to the at least one inlet 18 of the coolant path 7.
  • At the same time, at least one other of these coolant channels 16 is connected to the at least one outlet 19 of the coolant path 7 and also to the at least one coolant outlet 20 of the cooling device 1.
  • the coolant on the same side of the cooling device 1, here on the exhaust gas outlet side and discharged may offer parts. To realize this, are in the double wall
  • the respective diffuser 3, 4 for forming the double wall 15 has an inner wall 21 and an outer wall 22, which are connected to one another via at least one longitudinal web 23. As soon as more than one coolant channel
  • coolant channels 16 are to extend in the double wall 15, at least two such longitudinal webs 23 are required to separate adjacent coolant channels 16 from each other.
  • four such longitudinal webs 23 are provided, which are arranged distributed symmetrically. Accordingly, four coolant channels 16 are formed in the double wall 15, which are flowed through in parallel in an embodiment of FIG. 1 and in an embodiment of FIG. 2 are flowed through in anti-parallel.
  • the diffusers 3, 4 may also contain only one coolant channel 16 in other embodiments.
  • the longitudinal webs 23 are depending on the manufacturability / manufacturing process necessary to ensure the stability of the diffuser 3, 4. However, they are not mandatory for the function of the diffuser 3, 4.
  • the coolant inlet 17 is formed by a sealed plug connection 24 which is formed on the double wall 15 of the respective diffuser 3, 4.
  • the coolant outlet 20 may be formed by a sealed plug connection 25 which is formed on the double wall 15 of the respective diffuser 3, 4.
  • Such a sealed plug connection 24, 25 operates on the principle "plug &seal", which means that a sufficiently tight connection can be made with the insertion of a plug complementary to the respective plug connection 24, 25. It is clear that in principle the one shown in FIG Embodiment with an inlet plug-in connection 24 and / or with an outlet plug-in connection 25 on the respective diffuser 3, 4 may be provided.
  • the respective diffuser 3, 4 and the heat exchanger 2 are matched to one another in such a way that the respective diffuser 3, 4 has an end region 26 facing the heat exchanger 2, which has the Heat exchanger 2 radially overlaps externally in the axial direction.
  • the at least one coolant channel 16 extends into this end region 26.
  • this makes it possible to connect the coolant channel 16 axially to the coolant path 7.
  • both an end section 27 of the respective coolant channel 16 facing the coolant path 7 and an end section 28 of the coolant path 7 facing the respective coolant channel 16 are aligned axially and are aligned with one another.
  • Expediently coolant path 7 and coolant channel 16 in the end portions 27, 28 have the same cross-sections in order to avoid a jump in cross-section at the transition between the coolant channel 16 and the coolant path 7.
  • the pressure drop for the coolant flowing through the cooling device 1 can be reduced.
  • a calmed coolant flow is formed which effectively cools can and thus increases the cooling capacity and the effective radiator length.
  • the coupling between the respective diffuser 3, 4 and the heat exchanger 2 is preferably realized by means of an axial connector 29.
  • This connector 29 connects to a coolant path 7 tightly with the at least one coolant channel 16 and connects to the other the exhaust path 6 tightly with the respective gas-conducting portion 10 and 14 of the respective diffuser 3, 4th
  • the connector 29 in a preferred embodiment, an outer collar 30 and an outer sealing zone 31 have.
  • the outer collar 30 is formed on the respective diffuser 3, 4, protrudes axially, extends annularly closed, preferably on a radially outer edge.
  • the outer sealing zone 31 is dimensioned to complement and is formed on the heat exchanger 2 and also extends annularly.
  • the outer collar 30 engages over the outer sealing zone 31 in the axial direction.
  • an annular groove 32 is formed, in which a sealing element 33 is located, which may be, for example, an O-ring. When plugged in, the sealing element 33 seals the outer sealing zone 31 with respect to the outer collar 30.
  • annular groove 32 can in principle also be formed on the outer collar 30.
  • a plurality of annular grooves 32 may be formed on the outer sealing zone 31 and / or on the outer collar 30.
  • the connector 29 also has an inner collar 34 and an inner sealing zone 35.
  • the inner collar 34 is formed on the heat exchanger 2, protrudes axially from this and extends annularly closed.
  • the inner sealing zone 35 is designed to be complementary to the inner collar 34, is formed on the respective diffuser 3, 4 and likewise extends annularly.
  • the inner collar 34 When inserted, the inner collar 34 engages over the inner sealing zone 35 in the axial direction.
  • the inner collar 34 is provided with an annular groove 36 into which a sealing element 37, preferably an O-ring, is inserted.
  • the inner sealing zone 35 can be equipped with such an annular groove 36 with inserted sealing element 37.
  • a plurality of annular grooves 36 with inserted sealing elements 37 may be formed on the inner collar 34 and / or on the inner sealing zone 35. In the plug-in state, the sealing element 37 seals the inner collar 34 with respect to the inner sealing zone 35.
  • connection between the at least one coolant channel 16 and the coolant path 7 is sealed inwardly by the inner collar 34, the inner sealing zone 35 and the sealing element 37. At the same time seals the sealing element 37 between inner collar 34 and inner sealing zone 35, the connection between the exhaust path 6 and the gas-conducting portion 10, 14th
  • the respective coolant channel 16 is thus connected in the preferred embodiment shown here between the outer sealing zone 31 and the inner sealing zone 35 to the coolant path 7, whereby this port is sealed both outwardly and inwardly.
  • the diffusers 3, 4 in another Embodiment also be firmly connected to a non-descript housing of the heat exchanger 2, for example, welded.

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  • 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)

Abstract

L'invention concerne un dispositif de refroidissement (1) de gaz d'échappement recyclés d'un moteur à combustion interne, notamment dans un véhicule, comportant un échangeur thermique (2) contenant une voie de gaz d'échappement (6) et une voie de fluide de refroidissement (7) couplée thermiquement à la voie de gaz d'échappement, et un diffuseur d'entrée (3) connectant l'entrée de gaz d'échappement (8) du dispositif de refroidissement (1) à une entrée (9) de la voie de gaz d'échappement (6) ou un diffuseur de sortie (4) connectant une sortie (12) de la voie de gaz d'échappement (6) à une sortie de gaz d'échappement (13) du dispositif de refroidissement (1). Au moins un des diffuseurs (3, 4) comporte une paroi double (15) contenant au moins un canal de fluide de refroidissement (16), dans une section (10, 14) de guidage de gaz d'échappement.
PCT/EP2006/004310 2005-05-14 2006-05-09 Dispositif de refroidissement de gaz d'echappement recycles WO2006122675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005022389.3 2005-05-14
DE200510022389 DE102005022389A1 (de) 2005-05-14 2005-05-14 Kühleinrichtung für rückgeführte Abgase

Publications (1)

Publication Number Publication Date
WO2006122675A1 true WO2006122675A1 (fr) 2006-11-23

Family

ID=36754688

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/004310 WO2006122675A1 (fr) 2005-05-14 2006-05-09 Dispositif de refroidissement de gaz d'echappement recycles

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DE (1) DE102005022389A1 (fr)
WO (1) WO2006122675A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3136008A1 (fr) * 2022-05-24 2023-12-01 Safran Dispositif d’échangeur de chaleur amélioré pour turbomachine d’aéronef

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551553A1 (de) * 1966-06-27 1970-05-21 Waagner Biro Ag Verfahren zur Temperaturbegrenzung der Rohrwand und der Gefaesswandung eines Rohrbuendel-Waermetauschers,insbesondere mit parallelen Rohren
DE19936241A1 (de) * 1998-03-07 2001-02-01 Mann & Hummel Filter Vorrichtung zur Kühlung von Gasen
WO2001044651A1 (fr) * 1999-12-14 2001-06-21 Cooperstandard Automotive Fluid Systems Systeme integre de soupape de recyclage des gaz d'echappement (rge) et de refroidisseur
DE10247837A1 (de) * 2002-10-14 2004-04-22 Behr Gmbh & Co. Wärmeübertrager
DE10312788A1 (de) * 2003-03-21 2004-09-30 Behr Gmbh & Co. Kg Abgaswärmetauscher und Dichteinrichtung für Abgaswärmetauscher

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7623991U1 (fr) * Clarke Chapman Ltd., Gateshead, Tyne And Wear (Grossbritannien)
DE3133756C2 (de) * 1980-10-10 1985-04-25 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Doppelrohrkühler
DE10242556B4 (de) * 2002-09-13 2005-07-21 Benteler Automobiltechnik Gmbh Abgaskühler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551553A1 (de) * 1966-06-27 1970-05-21 Waagner Biro Ag Verfahren zur Temperaturbegrenzung der Rohrwand und der Gefaesswandung eines Rohrbuendel-Waermetauschers,insbesondere mit parallelen Rohren
DE19936241A1 (de) * 1998-03-07 2001-02-01 Mann & Hummel Filter Vorrichtung zur Kühlung von Gasen
WO2001044651A1 (fr) * 1999-12-14 2001-06-21 Cooperstandard Automotive Fluid Systems Systeme integre de soupape de recyclage des gaz d'echappement (rge) et de refroidisseur
DE10247837A1 (de) * 2002-10-14 2004-04-22 Behr Gmbh & Co. Wärmeübertrager
DE10312788A1 (de) * 2003-03-21 2004-09-30 Behr Gmbh & Co. Kg Abgaswärmetauscher und Dichteinrichtung für Abgaswärmetauscher

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Publication number Publication date
DE102005022389A1 (de) 2006-11-16

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