EP2175221A2 - Dispositif frigorifique - Google Patents

Dispositif frigorifique Download PDF

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Publication number
EP2175221A2
EP2175221A2 EP09170901A EP09170901A EP2175221A2 EP 2175221 A2 EP2175221 A2 EP 2175221A2 EP 09170901 A EP09170901 A EP 09170901A EP 09170901 A EP09170901 A EP 09170901A EP 2175221 A2 EP2175221 A2 EP 2175221A2
Authority
EP
European Patent Office
Prior art keywords
housing
cooling
channel
cooling device
contours
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.)
Granted
Application number
EP09170901A
Other languages
German (de)
English (en)
Other versions
EP2175221A3 (fr
EP2175221B1 (fr
Inventor
Bernhard Schwalk
Jörg Dittmann
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 EP2175221A2 publication Critical patent/EP2175221A2/fr
Publication of EP2175221A3 publication Critical patent/EP2175221A3/fr
Application granted granted Critical
Publication of EP2175221B1 publication Critical patent/EP2175221B1/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
    • 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
    • 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
    • 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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/022—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being wires or pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/06—Hollow fins; fins with internal circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/14—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded

Definitions

  • the present invention relates to a cooling device for an internal combustion engine, in particular an exhaust gas cooling device in a motor vehicle, according to the preamble of claim 1.
  • a generic cooling device is, for example, from the DE 10 2005 045 103 B3 known, in which a heat transfer device is provided in a housing.
  • the heat transfer device consists of an upper part and a lower part from which pin-shaped ribs extend into a channel in the heat transfer device.
  • Another such cooling device is, for example, from the DE 10 2005 045 098 A1 known.
  • an air intake duct system which has a collection intake passage in which a cooling device is integrated.
  • the collecting inlet channel is for this purpose divided into two separate channels, of which a first in the normal operation of exhaust gas and a second is traversed by air and wherein the air flow in normal operation channel can serve as a bypass channel for an exhaust gas flow in the warm-up phase.
  • the entire air intake duct system is designed in such a way that it can be mounted by simply stacking the individual parts. As a result, in particular a significantly reduced number of parts compared to known systems to be achieved.
  • a heat exchanger with a coolant-flow channel and a flow-through of a fluid to be cooled channel known, wherein the two channels are separated by a wall.
  • ribs extend into at least one of the two channels, each rib having a line-shaped leading edge and two line-shaped trailing edges. The arrival and trailing edges limit two steadily extending side walls of the ribs.
  • the present invention addresses the problem of providing a cooling device of the generic type, an improved embodiment, which is easy to manufacture and control exactly or to regulate and at the same time has a structurally simple structure.
  • the present invention is based on the general idea to equip a cooling device for cooling exhaust gases in a motor vehicle with a housing made of die-cast metal and in this housing both a first channel in which a heat transfer device is arranged, and a second channel, which is designed as a bypass channel is and bypasses the heat transfer device to integrate.
  • At least the second channel is formed by housing contours, which form an integral part of the metal die-cast housing. Separate parts for the realization of the individual channels are thus unnecessary, so that for the production of the cooling device according to the invention, only the heat transfer device is positioned or arranged in the first channel must be and then the housing can be closed, which are already formed by the integrally provided housing contours when closing the housing, the two channels.
  • the heat transfer device forms an integral part of the housing, for example in the form of molded-on cooling fins. Separately to be provided partition walls are thus also unnecessary, so that the cooling device according to the invention is structurally simple.
  • a nearly temperature-insensitive material is found by the use of metal die-casting for the housing, which withstands even high temperatures, such as those that can occur, for example, in an exhaust system of an internal combustion engine.
  • the provision of the housing contours, which form at least the second channel in the same during assembly of the housing can be realized by a correspondingly simple design or design of an injection mold.
  • a pivotable bypass flap is provided, through which a flow division between the first and the second channel takes place.
  • the bypass flap is controlled or regulated by a corresponding control / regulating device and divides the flowing in the cooling device flow to the first and second channel.
  • a first extreme position of the bypass flap the entire flow flows through the first channel and nothing through the second channel, while in the second extreme position of the pivotable bypass flap is exactly the case.
  • the flow between the two channels can be divided almost arbitrarily.
  • Such a pivotable bypass flap allows a very precise and at the same time with respect to the required parts cost-effective control of the flowing gas stream in the cooling device.
  • the housing is designed as a light metal die-cast housing, in particular of die-cast aluminum.
  • aluminum Due to its low density, aluminum is often used where it depends on the mass of a means of transport, because it contributes, for example, to fuel consumption. If alloying elements, such as, for example, magnesium, silicon or other metals are admixed with this, it is possible to achieve strengths which are only slightly inferior to those of steel.
  • alloying elements such as, for example, magnesium, silicon or other metals are admixed with this, it is possible to achieve strengths which are only slightly inferior to those of steel.
  • aluminum has extremely good thermal conductivity and is thus predestined for use in heat transfer devices.
  • cooling contours such as cooling fins may be formed, which cause cooling of the flowing exhaust gas flow, which due to the high thermal conductivity of the aluminum, a particularly good heat exchange can be ensured.
  • the housing is constructed in two parts, wherein on at least one of the two housing parts cooling contours, in particular cooling ribs are formed, which protrude into the first channel, preferably perpendicular to the flow direction.
  • the cooling contours force a flow around them through the hot exhaust gas and due to their large surface an intensive heat exchange.
  • the cooling contours may be formed hollow and flowed through by a cooling fluid.
  • the cooling fluid can, for example, from a cooling circuit, which also cools the engine, are removed, so that with the hot exhaust, for example, a warm-up of the Significantly shortened internal combustion engine and thereby the high NO x emissions can be reduced in particular at this stage.
  • such cooling devices can also be used for heating a passenger compartment, with the main focus being on reducing the exhaust-gas temperature before supplying it to a catalytic converter in order to be able to generally reduce pollutant emissions.
  • a cooling device 1 according to the invention for an internal combustion engine which is designed in particular as exhaust gas cooling device in a motor vehicle, a housing 2, in which in a first channel 3, a heat transfer device 4 is arranged.
  • the housing 2 is designed as a metal die-cast housing and has an integrated, second housing 6 formed by housing contours 5, 5 ', which is designed as a bypass channel and bypasses the heat transfer device 4.
  • the course of the first channel 3 and the second channel 6 are particularly well the Fig. 2a and 2c refer to.
  • a pivotable bypass flap 7 is provided, through which a flow division between the first channel 3 and the second channel 6 takes place.
  • the bypass valve 7 is merely one possible embodiment, so that generally also slides, valves, or the like can be used here.
  • the pivotable bypass flap 7 is pivotally mounted about an axis 8 and has outside the housing 2 an adjusting lever 9 which is rotatably connected to the bypass flap 7 and about which the position of the bypass flap 7 can be adjusted.
  • the bypass flap 7 is in a first extreme position in which it shuts off the second channel 6 and the entire flowing through the cooling device 1 gas flow passes exclusively through the first channel 3.
  • the housing 2 is formed at least in two parts and has a first housing part 10a and a second tightly connected thereto housing part 10b.
  • cooling contours 11, in particular cooling ribs are formed on at least one of the two housing parts 10a, 10b, which protrude into the first channel 3, preferably perpendicular to the flow direction, thereby forcing a deflection of the gas flow.
  • cooling contours 11 are formed on two housing parts 10a, 10b, which in the assembled housing 2, as for example. According to the Fig. 2c is shown, interlock. The in the sectional view according to the Fig.
  • cooling contours 11 shown are solid, wherein it is also conceivable that the cooling contours 11 are at least partially hollow and by a cooling fluid, in particular from the housing part 10a to the housing part 10b or vice versa, flows through.
  • the cooling contours 11 may have a blind hole acted upon by a cooling fluid, whereby an active cooling of the cooling contours 11 takes place, and thereby the cooling effect of the cooling device 1 is additionally improved.
  • the housing 2 is designed as a metal die-cast housing, wherein in particular light metals, such as, for example, aluminum or alloys thereof, can be used. Of course, also conceivable zinc or Magnesium die-cast housing. By alloying different metals to aluminum, it is possible to produce properties similar to steel, while maintaining the high thermal conductivity attributable to the aluminum.
  • the connection of the two housing parts 10a and 10b is usually pressure-tight, eg. By means of a welding process. By choosing the metal die casting as a material for the housing 2, this is insensitive to the high temperatures occurring in the exhaust gas and thus has a long service life. In the use of light metals for the material of the housing 2, moreover, weight can be saved, which is increasingly becoming the focus of modern motor vehicles due to steadily rising fuel costs.
  • the two cooling channels 3 and 6 exclusively by integrally connected to the housing 2 housing contours 5, 5 'to form, so that in addition separating elements, which are both expensive and expensive to install on the other hand, can be omitted.
  • a housing 2 or such housing parts 10a and 10b can be produced inexpensively by an appropriate design of the die casting with almost any geometry and beyond.
  • an exhaust gas recirculation valve 12 is located, which are integrated into the cooling device 1 or at least cooled by a cooling jacket or directly with coolant.
  • Covering the housing part 10a and / or 10b can still be provided, in particular made of plastic, upper and / or lower cover 13, in which further components not shown, such as a thermostatic valve, can be integrated or installed.
  • the / the cover 13 can / can be screwed via screws 14 to the associated housing parts.
EP09170901A 2008-10-10 2009-09-22 Dispositif frigorifique Not-in-force EP2175221B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008051268A DE102008051268A1 (de) 2008-10-10 2008-10-10 Kühleinrichtung

Publications (3)

Publication Number Publication Date
EP2175221A2 true EP2175221A2 (fr) 2010-04-14
EP2175221A3 EP2175221A3 (fr) 2011-12-14
EP2175221B1 EP2175221B1 (fr) 2013-02-20

Family

ID=41503633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09170901A Not-in-force EP2175221B1 (fr) 2008-10-10 2009-09-22 Dispositif frigorifique

Country Status (3)

Country Link
US (1) US20100089043A1 (fr)
EP (1) EP2175221B1 (fr)
DE (1) DE102008051268A1 (fr)

Cited By (4)

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EP2476986A1 (fr) * 2011-01-17 2012-07-18 UNICAL AG S.p.A. Échangeur de chaleur avec une utilisation très souple
WO2012126654A1 (fr) * 2011-03-22 2012-09-27 Pierburg Gmbh Module de recirculation des gaz d'échappement pour moteur à combustion interne
EP2405222A3 (fr) * 2010-06-14 2014-08-06 Pierburg GmbH Dispositif d'échange de chaleur et procédé de fabrication d'un dispositif d'échange de chaleur
EP3146818A4 (fr) * 2014-05-23 2018-01-24 Tesla Motors Inc. Dissipateur thermique ayant une cavité interne pour refroidir un liquide

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EP2175221A3 (fr) 2011-12-14
EP2175221B1 (fr) 2013-02-20
US20100089043A1 (en) 2010-04-15
DE102008051268A1 (de) 2010-04-15

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