EP2667007A1 - Heat exchanger, exhaust gas recirculation system and internal combustion engine - Google Patents

Heat exchanger, exhaust gas recirculation system and internal combustion engine Download PDF

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Publication number
EP2667007A1
EP2667007A1 EP13181477.4A EP13181477A EP2667007A1 EP 2667007 A1 EP2667007 A1 EP 2667007A1 EP 13181477 A EP13181477 A EP 13181477A EP 2667007 A1 EP2667007 A1 EP 2667007A1
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EP
European Patent Office
Prior art keywords
heat exchanger
working fluid
filter
flange
fluid filter
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
EP13181477.4A
Other languages
German (de)
French (fr)
Other versions
EP2667007B1 (en
Inventor
Jérôme GENOIST
Hermann Knaus
Matthias SCHÜLE
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
Mahle Behr France Rouffach SAS
Original Assignee
Behr GmbH and Co KG
Behr France Rouffach SAS
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Filing date
Publication date
Application filed by Behr GmbH and Co KG, Behr France Rouffach SAS filed Critical Behr GmbH and Co KG
Priority to EP13181477.4A priority Critical patent/EP2667007B1/en
Publication of EP2667007A1 publication Critical patent/EP2667007A1/en
Application granted granted Critical
Publication of EP2667007B1 publication Critical patent/EP2667007B1/en
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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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
    • 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
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • 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
    • 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
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0462—Liquid cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0475—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/024—Air cleaners using filters, e.g. moistened
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0082—Charged air coolers
    • 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 reduction of nitrogen oxides in exhaust gases of an internal combustion engine can be achieved particularly effectively in the context of exhaust gas recirculation.
  • This approach has been in the context of increasingly restrictive emission standards especially for a diesel internal combustion engine proved to be important.
  • the invention begins, whose task is to provide a device by means of which the particle load in a working fluid of an internal combustion engine can be reduced and in which nevertheless a space requirement for the filter is kept relatively small or uncritical.
  • a fluidically advantageous integration of the filter is to take place, advantageously with a comparatively low pressure loss.
  • the handling of the filter should also be possible in a simplified manner.
  • the heat exchanger block preferably has a core with a number of flow passages through which the first fluid can flow, and a chamber receiving the flow passages, through which the second fluid can flow, in a housing.
  • the structure of the heat exchanger block is not limited to this preferred form.
  • the core may also have a bottom which receives the flow channels and keeps them frame-like spaced.
  • a connecting line following the concept of the invention, can be fastened to the housing and / or to the floor.
  • connection line can be an inlet and / or outlet line. It has proved to be particularly advantageous that the working fluid filter is mounted on the working fluid inlet side of the heat exchanger between the heat exchanger block and a supply line. In principle, moreover, additionally or alternatively, the working fluid filter can also be mounted on the working fluid outlet side of the heat exchanger between the heat exchanger block and a discharge line.
  • the working fluid filter has a filter surface which is flat.
  • a flat filter surface has an advantageously small space requirement and is advantageous in terms of flow or in particular has a comparatively low pressure loss.
  • the working fluid filter may have a filter surface which is non-flat.
  • this may be a curved filter surface, preferably a dome-shaped filter surface.
  • the shape of the curved filter surface can be designed overall such that it has a diffuser-like effect. Basically, the shape of the filter surface can be designed fluidically optimized.
  • the flange of the working fluid filter can be attached by means of a tongue and groove connection between a connecting flange of the connecting line and a counter flange of the heat exchanger block.
  • the flange may have a spring and / or groove as a connecting means.
  • the flange can act like a seal.
  • the sealing effect is not absolutely necessary.
  • the tongue and groove connection has the advantage that the working fluid filter can be held comparatively securely and avoiding more complex connection means between the connecting line and the heat exchanger block.
  • the heat exchanger is advantageously designed as a low-pressure heat exchanger. It has been found that, especially in the low pressure range of exhaust gas recirculation, a working fluid filter can be integrated in a space-saving manner in the heat exchanger according to the concept of the invention.
  • the concept of the invention for solving the problem also leads to an internal combustion engine, in particular a diesel internal combustion engine, with an exhaust gas recirculation system of the aforementioned type.
  • Fig. 1A shows a heat exchanger 10 in the form of a low-pressure heat exchanger for incorporation into an exhaust gas recirculation system downstream of a particulate filter and upstream of a compressor for the working fluid.
  • the heat exchanger 10 has a heat exchanger block 11 with a housing 12 and a housing 12, not shown core for separate and heat exchanging guidance of a working fluid AF and a cooling fluid KF.
  • the housing 12 which can be flowed through by the cooling fluid KF is supplied to it via inlet and outlet ports 13.1, 13.2, wherein the cooling fluid KF is shown symbolically by arrows.
  • the working fluid AF which is also shown symbolically by arrows, is provided to a number of flow passages 21 (FIG. Fig.
  • the diffuser 15 serves one flow-equal supply of the working fluid - in the present case in the form of exhaust gas of a diesel internal combustion engine - from the connecting line 14.1 and is formed in the form of a funnel-like element.
  • Fig. 1 B shows the same heat exchanger 10 without the connection line 14.1, so that the working fluid filter 1 can be seen.
  • the working fluid filter 1 has a flat filter surface 2 and a in Fig. 1A recognizable flange 3, which flange 3 is clamped between the connecting flange 18 of the connecting line 14.1 and the mating flange 19 of the heat exchanger block 11 by means of screw S.
  • the working fluid filter 1 is formed with a flange 3 in the form of a metallic sealing collar, wherein the filter surface 2 is welded into the flange 3.
  • the working fluid filter 1 is provided on the one hand with a filter function and on the other with a sealing function.
  • the filter surface 2 is advantageously not only designed to save space in a space-saving manner, but can also be effectively accommodated in the funnel-shaped interior of the funnel of the diffuser 15.
  • the flat design of the filter surface 2 is streamlined in the area of equalization of the flow of the working fluid, i. in the funnel-shaped interior of the diffuser 15, arranged.
  • FIG. 2A and Fig. 2B show analogously a second embodiment of a heat exchanger 20 - again in Fig. 2A with a connection line 14.1 and in Fig. 2B without a connecting cable 14.1.
  • Fig. 2B In addition, the view I on the working fluid filter 1 is shown enlarged in II.
  • the heat exchanger 20 differs from the heat exchanger 10 in the arrangement of the inlet and outlet nozzles 13.1, 13.2 for the cooling fluid KF.
  • the connection line 14.1 as a supply line and the connecting line 14.2 with a diffuser 15.1, 15.2 is set up.
  • Fig. 2B again shows the working fluid filter 1 with a flat filter surface 2, which is flowed through axially, and with a formed in the form of a gasket flange 3, which is analogous to the embodiment of a heat exchanger 10 in Fig. 1A, Fig. 1B , is clamped with screw S between the connection flange 18 of the connection line 14.1 and the mating flange 19 of the heat exchanger block 11.
  • a gasket 4 is clamped between the heat exchanger block 11 and the connection line 14.2, namely the corresponding flanges of the outlet side, on the working fluid outlet side of the heat exchanger 20.
  • the gasket 4 may - as needed - similar to the gasket 3 wear a filter surface or be used without a filter surface.
  • the embodiment of a heat exchanger 20 can thus be a working fluid filter 1 as needed integrate the input side of the heat exchanger 20 and the output side of the heat exchanger 20.
  • FIG. 3 shows the constructive detail of a Fig. 1A, Fig. 1B shown heat exchanger 10 without housing 12.
  • This will in addition to the - in Fig. 4 enlarged and perspectively illustrated working fluid filter 1 - the flow channels 21 recognizable, one of which is representatively represented as a flat tube.
  • the flow channels 21 formed as flat tubes are each held in a bottom 22 of the heat exchanger core, which for example Having trained as passages openings 23 for receiving a flat tube.
  • Fig. 5 shows a to the working fluid filter 1 of Fig. 4 alternative embodiment of a working fluid filter 5.1 with a curved filter surface 6 and a simple flange 7, which also has openings 8. These can be penetrated by aforementioned screw connections S during installation of the working fluid filter 5, for example in a heat exchanger 10 or in a heat exchanger 20.
  • the curved filter surface 6 of the working fluid filter 5.1 has the advantage that this can take over diffuser function and thus contributes to the flow equalization.
  • FIG. 6 An exemplary installation possibility of a slightly modified working fluid filter 5.2 on an output side of a heat exchanger is in Fig. 6 shown.
  • the working fluid filter 5.2 is also flowed through axially and a diffuser-like effect for the working fluid AF is effected via the curved filter surface 6.
  • the shape of the working fluid filter 5.2 which is varied in the region of the flange 7, can be seen enlarged.
  • the working fluid filter 5.2 has in the region of the flange 7, a spring 9, which, as from view II of Fig.
  • a tongue and groove connection 24 allows a particularly safe and yet easy integration of the working fluid filter 5.2 in the heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The heat exchanger (10) has a heat exchanger block (11) that performs heat exchange between work fluid (AF) such as exhaust gas or air and cooling fluid (KF) such as coolant. Working fluid filters are provided between the working fluid connecting lines (14.1,14.2). The working fluid connecting lines are connected to the heat exchanger block. Pick-up flange (18) is provided in each connecting line and is provided with a diffuser. An independent claim is included for exhaust gas recirculation system.

Description

Die Erfindung betrifft einen Wärmetauscher zum Wärmetausch zwischen einem Arbeitsfluid einerseits und einem Kühlfluid andererseits und mit einem Arbeitsfluid-Filter, wobei der Wärmetauscher aufweist: einen Wärmetauscherblock zur Umsetzung des Wärmetausches; wenigstens eine Anschlussleitung für das Arbeitsfluid. Die Erfindung führt auch auf ein vorteilhaftes Abgasrückführsystem und eine Brennkraftmaschine, insbesondere eine Diesel-Brennkraftmaschine.The invention relates to a heat exchanger for heat exchange between a working fluid on the one hand and a cooling fluid on the other hand and with a working fluid filter, wherein the heat exchanger comprises: a heat exchanger block for implementing the heat exchange; at least one connecting line for the working fluid. The invention also leads to a favorable exhaust gas recirculation system and an internal combustion engine, in particular a diesel internal combustion engine.

Die Reduzierung von Stickoxiden in Abgasen einer Brennkraftmaschine kann besonders effektiv im Rahmen einer Abgasrückführung erreicht werden. Dazu wird ausgangsseitiges Arbeitsfluid, insbesondere ein Abgas, der Brennkraftmaschine in komprimierter und gekühlter Form, der Brennkraftmaschine als eingangsseitiges Arbeitsfluid zugeführt, ggf. zusammen mit einer Ladeluft. Dieses Vorgehen hat sich im Rahmen von zunehmend restriktiven Abgasnormen insbesondere für eine Diesel-Brennkraftmaschine als wichtig erwiesen.The reduction of nitrogen oxides in exhaust gases of an internal combustion engine can be achieved particularly effectively in the context of exhaust gas recirculation. For this purpose, the output side working fluid, in particular an exhaust gas, the internal combustion engine in compressed and cooled form, the internal combustion engine supplied as an input-side working fluid, possibly together with a charge air. This approach has been in the context of increasingly restrictive emission standards especially for a diesel internal combustion engine proved to be important.

Zur Kühlung des Arbeitsfluids dient regelmäßig ein eingangs erwähnter Wärmetauscher. Die Kompression des Arbeitsfluids wird mittels eines Verdichters erreicht. Es hat sich gezeigt, dass die mit Arbeitsfluid beaufschlagten Teile eines Verdichters verschleißanfällig sind. Dies gilt insbesondere bei Diesel-Brennkraftmaschinen, deren als Arbeitsfluid einzusetzendes Abgas in vergleichsweise hohem Maße partikelbeladen ist. Die Partikel können sich nicht nur auf Oberflächen des Verdichters absetzen und dessen Funktion beeinträchtigen, sondern darüber hinaus durch deren Impulswirkung die mit Arbeitsfluid beaufschlagten Oberflächen des Verdichters so stark verschleißen, dass dieser ggf. frühzeitig ausgewechselt werden muss. Die Partikelbeladung des Abgases kann trotz eines Dieselpartikelfilters anhalten, da dieser einer Alterung unterliegt und vor allem im Rahmen einer Regeneration ein erhöhter Partikeleintrag in das Abgas nicht verhindert werden kann.For the cooling of the working fluid is a regularly mentioned heat exchanger. The compression of the working fluid is achieved by means of a compressor. It has been found that the working fluid acted upon parts of a compressor are susceptible to wear. This applies in particular to diesel internal combustion engines whose exhaust gas to be used as the working fluid is particle-laden to a relatively high degree. The particles can not only settle on surfaces of the compressor and affect its function, but also wear so much by their impulse action applied to working fluid surfaces of the compressor that it may need to be replaced early. The particulate charge of the exhaust gas can persist despite a diesel particulate filter, as it is subject to aging and especially in the context of regeneration increased particulate entry into the exhaust gas can not be prevented.

Zur Behebung derartiger Probleme ist in DE 69 732 534 T2 ein Abgasrückführsystem vorgeschlagen worden, bei dem zur Partikelreduktion stromabwärtig eines Wärmetauschers ein Filter angeordnet ist, wobei der Filter ein Einlassende und ein Auslassende aufweist, wobei das Einlassende des Filters mit einem Auslassende des Wärmetauschers verbunden ist und das Auslassende des Filters mit einem Ansaugrohr des Motors verbindbar ist. Ein solcher Wärmetauscher der eingangs genannten Art sieht somit außerhalb des Wärmetauschers einen Arbeitsfluid-Filter vor, welcher zusätzlichen Raumbedarf beansprucht und welcher strömungstechnisch mit vergleichsweise hohem Druckverlust verbunden ist.To remedy such problems is in DE 69 732 534 T2 an exhaust gas recirculation system has been proposed in which a filter is disposed downstream of a heat exchanger for particulate reduction, the filter having an inlet end and an outlet end, the inlet end of the filter being connected to an outlet end of the heat exchanger and the outlet end of the filter connectable to an intake tube of the engine is. Such a heat exchanger of the type mentioned thus provides outside of the heat exchanger before a working fluid filter, which requires additional space and which is fluidically associated with relatively high pressure drop.

Wünschenswert wäre eine verbesserte Ausführung des Filters, ohne dass eine Filterleistung desselben beeinträchtigt ist.It would be desirable to have an improved filter design without sacrificing filter performance.

An dieser Stelle setzt die Erfindung an, deren Aufgabe es ist, eine Vorrichtung anzugeben, mittels der die Partikelbelastung in einem Arbeitsfluid einer Brennkraftmaschine verringert werden kann und bei der dennoch ein Raumbedarf für den Filter vergleichsweise gering oder unkritisch gehalten ist. Insbesondere soll eine strömungstechnisch vorteilhafte Einbindung des Filters erfolgen, vorteilhaft bei vergleichsweise geringem Druckverlust. Insbesondere soll darüber hinaus die Handhabung des Filters vereinfacht möglich sein.At this point, the invention begins, whose task is to provide a device by means of which the particle load in a working fluid of an internal combustion engine can be reduced and in which nevertheless a space requirement for the filter is kept relatively small or uncritical. In particular, a fluidically advantageous integration of the filter is to take place, advantageously with a comparatively low pressure loss. In particular, the handling of the filter should also be possible in a simplified manner.

Betreffend die Vorrichtung wird die Aufgabe durch die Erfindung mittels eines Wärmetauschers der eingangs genannten Art gelöst, bei dem erfindungsgemäß zur Integration des Arbeitsfluid-Filters im Wärmetauscher der Arbeitsfluid-Filter zwischen Wärmetauscherblock einerseits und Anschlussleitung andererseits angebracht ist, wobei die Anschlussleitung am Wärmetauscherblock angeschlossenRegarding the device, the object is achieved by the invention by means of a heat exchanger of the type mentioned, is mounted according to the invention for integration of the working fluid filter in the heat exchanger of the working fluid filter between heat exchanger block on the one hand and connecting line on the other hand, wherein the connecting line connected to the heat exchanger block

Der Wärmetauscherblock weist bevorzugt einen Kern mit einer Anzahl von dem ersten Fluid durchströmbaren Strömungskanälen auf und eine die Strömungskanäle aufnehmende, von dem zweiten Fluid durchströmbare Kammer in einem Gehäuse. Der Aufbau des Wärmetauscherblocks ist jedoch nicht auf diese bevorzugte Form beschränkt. So kann der Kern darüber hinaus einen Boden aufweisen, welcher die Strömungskanäle aufnimmt und diese rahmenähnlich beabstandet hält. Grundsätzlich kann eine Anschlussleitung, dem Konzept der Erfindung folgend, am Gehäuse und/oder am Boden festgemacht werden. In besonders vorteilhafter Weise kann der Wärmetauscher block dementsprechend aufweisen: einen Kern zur voneinander getrennten wärmetauschenden Führung des Arbeitsfluids und des Kühlfluids; einen den Kern aufnehmendes, von dem Kühlfluid durchströmbares Gehäuse; wobei der Arbeitsfluid-Filter zwischen Gehäuse bzw. Kern einerseits und Anschlussleitung andererseits angebracht ist, wobei die Anschlussleitung am Gehäuse bzw. Kern angeschlossen ist.The heat exchanger block preferably has a core with a number of flow passages through which the first fluid can flow, and a chamber receiving the flow passages, through which the second fluid can flow, in a housing. However, the structure of the heat exchanger block is not limited to this preferred form. Thus, the core may also have a bottom which receives the flow channels and keeps them frame-like spaced. In principle, a connecting line, following the concept of the invention, can be fastened to the housing and / or to the floor. In a particularly advantageous manner, the heat exchanger block accordingly have: a core for separate heat exchanging guidance of the working fluid and the cooling fluid; a core receiving, permeable by the cooling fluid housing; wherein the working fluid filter between the housing or core on the one hand and connecting line on the other hand is mounted, wherein the connecting line is connected to the housing or core.

Es hat sich gezeigt, dass ein auf diese Weise im Wärmetauscher integrierter Arbeitsfluid-Filter besonders raumsparend untergebracht ist. Der Wärmetauscher kann zusammen mit dem Arbeitsfluid-Filter als ein Modul angeboten werden. Dadurch ist eine erhebliche Reduzierung des Raumbedarfs im Vergleich zum Stand der Technik möglich. Es hat sich darüber hinaus gezeigt, dass das Konzept der Erfindung eine strömungstechnisch besonders vorteilhafte Einbindung des Arbeitsfluid-Filters in die Arbeitsfluidführung ermöglicht. Darüber hinaus lässt sich ein Arbeitsfluid-Filter nicht nur besonders leicht auswechseln, sondern auch vergleichsweise einfach dauerhaft entfernen für den Fall, dass kein Arbeitsfluid-Filter im Wärmetauschermodul erforderlich ist. Dies liegt darin begründet, dass die Anschlussleitung am Wärmetauscherblock angeschlossen ist und bei Bedarf der Arbeitsfluid-Filter eben zwischen dem Wärmetauscherblock einerseits und der Anschlussleitung andererseits wegfallen kann - oder bei Bedarf gehalten ist.It has been found that a working fluid filter integrated in this manner in the heat exchanger is accommodated in a particularly space-saving manner. The heat exchanger can be offered together with the working fluid filter as a module. As a result, a significant reduction in space requirements compared to the prior art is possible. It has also been shown that the concept of the invention enables a fluidically particularly advantageous integration of the working fluid filter in the working fluid guide. In addition, a working fluid filter is not only particularly easy to replace, but also relatively easy to permanently remove in the event that no working fluid filter in the heat exchanger module is required. This is due to the fact that the connecting line is connected to the heat exchanger block and if necessary, the working fluid filter just between the heat exchanger block on the one hand and the connecting line on the other hand can be omitted - or held if necessary.

Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen und geben im Einzelnen vorteilhafte Möglichkeiten an, das oben erläuterte Konzept im Rahmen der Aufgabenstellung, sowie hinsichtlich weiterer Vorteile zu realisieren.Advantageous developments of the invention can be found in the dependent claims and specify in detail advantageous ways to realize the above-described concept within the scope of the task, as well as with regard to further advantages.

Die Anschlussleitung ist besonders vorteilhaft mit einem Anschlussflansch gebildet. Ein Anschlussflansch erleichtert wesentlich die Anbindung an den Wärmetauscherblock unter Anbringung des Arbeitsfluid-Filters. Vorteilhaft ist der Anschlussflansch mit einem Diffusor gebildet. Der Diffusor hat grundsätzlich strömungsvergleichmäßigende Eigenschaften für das Arbeitsfluid. Im vorliegenden Fall hat der Diffusor darüber hinaus einen ausreichenden Innenraum, der geeignet ist einen dahingehend geformten Filter anbringen zu können.The connection line is particularly advantageously formed with a connection flange. A connecting flange substantially facilitates the connection to the heat exchanger block with attachment of the working fluid filter. Advantageously, the connection flange is formed with a diffuser. The diffuser basically has flow comparison properties for the working fluid. In the present case, moreover, the diffuser has a sufficient internal space which is suitable for being able to attach a filter shaped to this effect.

Grundsätzlich kann die Anschlussleitung eine Zu- und/oder Abführleitung sein. Es hat sich als besonders vorteilhaft erwiesen, dass der Arbeitsfluid-Filter auf Arbeitsfluideinlassseite des Wärmetauschers zwischen Wärmetauscherblock und einer Zuführleitung angebracht ist. Grundsätzlich kann darüber hinaus - zusätzlich oder alternativ - der Arbeitsfluid-Filter auch auf Arbeitsfluidauslassseite des Wärmetauschers zwischen dem Wärmetauscherblock und einer Abführleitung angebracht sein.In principle, the connection line can be an inlet and / or outlet line. It has proved to be particularly advantageous that the working fluid filter is mounted on the working fluid inlet side of the heat exchanger between the heat exchanger block and a supply line. In principle, moreover, additionally or alternatively, the working fluid filter can also be mounted on the working fluid outlet side of the heat exchanger between the heat exchanger block and a discharge line.

Im Rahmen einer ersten Variante hat es sich als vorteilhaft erwiesen, dass der Arbeitsfluid-Filter eine Filterfläche aufweist, die flach ausgebildet ist. Eine flache Filterfläche hat einen vorteilhaft geringen Raumbedarf und ist strömungstechnisch vorteilhaft bzw. weist insbesondere einen vergleichsweise geringen Druckverlust auf.In the context of a first variant, it has proved to be advantageous that the working fluid filter has a filter surface which is flat. A flat filter surface has an advantageously small space requirement and is advantageous in terms of flow or in particular has a comparatively low pressure loss.

In einer zweiten Variante kann der Arbeitsfluid-Filter eine Filterfläche aufweisen, die nicht - flach ausgebildet ist. Insbesondere kann dies eine gewölbte Filterfläche, vorzugsweise eine kalottenförmige Filterfläche sein. Die Form der gewölbten Filterfläche kann insgesamt derart ausgelegt sein, dass diese eine diffusorähnliche Wirkung hat. Grundsätzlich lässt sich die Form der Filterfläche strömungstechnisch optimiert gestalten.In a second variant, the working fluid filter may have a filter surface which is non-flat. In particular, this may be a curved filter surface, preferably a dome-shaped filter surface. The shape of the curved filter surface can be designed overall such that it has a diffuser-like effect. Basically, the shape of the filter surface can be designed fluidically optimized.

Insbesondere ist mit Vorteil versehen der Arbeitsfluid-Filter zur axialen Durchströmung ausgebildet. Dadurch wird ein möglichst geringer Druckverlust im Arbeitsfluid-Filter erreicht, beispielsweise durch weitgehende Vermeidung einer Radialströmungskomponente im Arbeitsfluid-Filter.In particular, the working fluid filter is designed for axial flow with advantage. As a result, the lowest possible pressure loss in the working fluid filter is achieved, for example by largely avoiding a radial flow component in the working fluid filter.

Im Rahmen einer besonders bevorzugten Weiterbildung weist der Arbeitsfluid-Filter einen Flansch auf, der zwischen einem Flansch der Anschlussleitung und einem Flansch des Wärmetauscherkerns angebracht ist. Durch die Flanschanbindung des Arbeitsfluid-Filters lässt sich derselbe unter Formschluss, Kraftschluss oder dergleichen zwischen den Flanschen des Wärmetauscherkerns bzw. der Anschlussleitung anbringen, insbesondere fixieren. Der Flansch kann frei von Verbindungsmitteln sein oder geeignete Verbindungsmittel aufweisen, ggf. auch Löcher od. dgl. Für Verbindungsmittel.In a particularly preferred embodiment, the working fluid filter has a flange which is mounted between a flange of the connecting line and a flange of the heat exchanger core. Due to the flange connection of the working fluid filter, the same can be attached, in particular fixed, under positive locking, frictional connection or the like between the flanges of the heat exchanger core or the connection line. The flange can be free of connecting means or have suitable connecting means, if necessary also holes or the like. For connecting means.

So lässt sich besonders vorteilhaft der Arbeitsfluid-Filter mit einem Flansch in Form einer Dichtungsmanschette realisieren, insbesondere in Form einer metallischen Dichtungsmanschette. So kann die Filterfläche des Arbeitsfluid-Filters vorteilhaft durch eine Fügeverbindung mit dem Flansch verbunden sein. Eine Fügeverbindung kann insbesondere in Form einer Schweiß- und/oder Lötverbindung zur Verfügung gestellt werden. Alternativ kann der Arbeitsfluid-Filter mit Filterfläche und Flansch auch einstückig ausgeführt sein oder die Filterfläche kann kraftschlüssig, beispielsweise klemmend, mit dem Flansch verbunden sein. Bei der Wahl der Verbindung lassen sich die Druck- und Strömungsgegebenheiten an der Einbaustelle des Arbeitsfluid-Filters geeignet berücksichtigen.Thus, the working fluid filter can be realized with a flange in the form of a gasket, particularly in the form of a metallic gasket particularly advantageous. Thus, the filter surface of the working fluid filter can be advantageously connected by a joint connection with the flange. A joint connection can be provided in particular in the form of a welding and / or solder joint. Alternatively, the working fluid filter with filter surface and flange can also be made in one piece or the filter surface can be frictionally, for example, clamped, connected to the flange. When choosing the connection, the pressure and flow conditions at the installation point of the working fluid filter can be suitably taken into account.

Im Rahmen einer zweiten besonders bevorzugten Weiterbildung kann der Flansch des Arbeitsfluid-Filters mittels einer Nut-Feder-Verbindung zwischen einem Anschlussflansch der Anschlussleitung und einem Gegenflansch des Wärmetauscherblocks angebracht sein. So kann der Flansch eine Feder und/oder Nut als Verbindungsmittel aufweisen. Dabei kann der Flansch wie eine Dichtung wirken. Die Dichtwirkung ist jedoch nicht unbedingt erforderlich. Die Nut-Feder-Verbindung hat den Vorteil, dass der Arbeitsfluid-Filter vergleichsweise sicher und unter Vermeidung aufwändigerer Verbindungsmittel zwischen der Anschlussleitung und dem Wärmetauscherblock gehalten werden kann.In the context of a second particularly preferred development, the flange of the working fluid filter can be attached by means of a tongue and groove connection between a connecting flange of the connecting line and a counter flange of the heat exchanger block. Thus, the flange may have a spring and / or groove as a connecting means. The flange can act like a seal. However, the sealing effect is not absolutely necessary. The tongue and groove connection has the advantage that the working fluid filter can be held comparatively securely and avoiding more complex connection means between the connecting line and the heat exchanger block.

Betreffend die Vorrichtung führt die Erfindung zur Lösung der Aufgabe auch auf ein Abgasrückführsystem aufweisend:

  • einen Partikelfilter für ein Arbeitsfluid stromabwärtig einer Arbeitsfluidauslassleitung einer Brennkraftmaschine;
  • einen Wärmetauscher gemäß dem Konzept der Erfindung stromabwärtig des Partikelfilters; und
  • einen Verdichter für das Arbeitsfluid stromabwärtig des Wärmetauschers und stromaufwärtig vor einer Arbeitsfluideinlassleitung einer Brennkraftmaschine.
Regarding the device, the invention leads to the solution of the problem also to an exhaust gas recirculation system comprising:
  • a particulate filter for a working fluid downstream of a working fluid outlet line of an internal combustion engine;
  • a heat exchanger according to the concept of the invention downstream of the particulate filter; and
  • a compressor for the working fluid downstream of the heat exchanger and upstream of a working fluid inlet line of an internal combustion engine.

Im Rahmen des Abgasrückführsystems ist der Wärmetauscher in vorteilhafter Weise als Niederdruckwärmetauscher ausgebildet. Es hat sich gezeigt, dass sich vor allem im Niederdruckbereich der Abgasrückführung ein Arbeitsfluid-Filter platzsparend im Wärmetauscher gemäß dem Konzept der Erfindung integrieren lässt.In the context of the exhaust gas recirculation system, the heat exchanger is advantageously designed as a low-pressure heat exchanger. It has been found that, especially in the low pressure range of exhaust gas recirculation, a working fluid filter can be integrated in a space-saving manner in the heat exchanger according to the concept of the invention.

Entsprechend führt das Konzept der Erfindung zur Lösung der Aufgabe auch auf eine Brennkraftmaschine, insbesondere eine Diesel-Brennkraftmaschine, mit einem Abgasrückführsystem der vorgenannten Art.Accordingly, the concept of the invention for solving the problem also leads to an internal combustion engine, in particular a diesel internal combustion engine, with an exhaust gas recirculation system of the aforementioned type.

Ausführungsbeispiele der Erfindung werden nun nachfolgend anhand der Zeichnung beschrieben. Diese soll die Ausführungsbeispiele nicht notwendigerweise maßstäblich darstellen, vielmehr ist die Zeichnung, wo zur Erläuterung dienlich, in schematisierter und/oder leicht verzerrter Form ausgeführt. Im Hinblick auf Ergänzungen der aus der Zeichnung unmittelbar erkennbaren Lehren wird auf den einschlägigen Stand der Technik verwiesen. Dabei ist zu berücksichtigen, dass vielfältige Modifikationen und Änderungen betreffend die Form und das Detail einer Ausführungsform vorgenommen werden können, ohne von der allgemeinen Idee der Erfindung abzuweichen. Die in der Beschreibung, in der Zeichnung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Weiterbildung der Erfindung wesentlich sein. Zudem fallen in den Rahmen der Erfindung alle Kombinationen aus zumindest zwei der in der Beschreibung, der Zeichnung und/oder den Ansprüchen offenbarten Merkmale. Die allgemeine Idee der Erfindung ist nicht beschränkt auf die exakte Form oder das Detail der im folgenden gezeigten und beschriebenen bevorzugten Ausführungsform oder beschränkt auf einen Gegenstand, der eingeschränkt wäre im Vergleich zu dem in den Ansprüchen beanspruchten Gegenstand. Bei angegebenen Bemessungsbereichen sollen auch innerhalb der genannten Grenzen liegende Werte als Grenzwerte offenbart und beliebig einsetzbar und beanspruchbar sein. Der Einfachheit halber sind nachfolgend für identische oder ähnliche Teile oder Teile mit identischer oder ähnlicher Funktion gleiche Bezugszeichen verwendet.Embodiments of the invention will now be described below with reference to the drawing. This is not necessarily to scale the embodiments, but the drawing, where appropriate for explanation, executed in a schematized and / or slightly distorted form. With regard to additions to the teachings directly recognizable from the drawing reference is made to the relevant prior art. It should be noted that various modifications and changes may be made in the form and detail of an embodiment without departing from the general idea of the invention. The disclosed in the description, in the drawing and in the claims features of the invention may be essential both individually and in any combination for the development of the invention. In addition, fall within the scope of the invention, all combinations of at least two of the disclosed in the description, the drawings and / or the claims Characteristics. The general idea of the invention is not limited to the exact form or detail of the preferred embodiment shown and described below or limited to an article which would be limited in comparison to the subject matter claimed in the claims. For the given design ranges, values within the stated limits should also be disclosed as limit values and be arbitrarily usable and claimable. For simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar function.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung der bevorzugten Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in:

Fig. 1A, Fig. 1B:
eine perspektivische Darstellung einer ersten bevorzugten Ausführungsform eines Wärmetauschers in einer Darstellung mit Diffusoranschlussleitung (A) und ohne Diffusoranschlussleitung (B) zur Ansicht des Arbeitsfluid-Filters;
Fig. 2A, Fig. 2B:
eine perspektivische Ansicht einer zweiten bevorzugten Ausführungsform eines Wärmetauschers in einer Darstellung mit Diffusoranschlussleitung (A) und ohne Diffusoranschlussleitung (B) zur Ansicht des Arbeitsfluid-Filters, in Ansicht I und vergrößert in II;
Fig. 3:
eine perspektivische Darstellung des konstruktiven Details zur Integration eines Arbeitsfluid-Filters im Wärmetauscher gemäß einer ersten Variante;
Fig. 4:
eine perspektivische Ansicht eines ersten Arbeitsfluid-Filters der Fig. 3 mit flacher Filterfläche;
Fig. 5:
eine perspektivische Ansicht eines zweiten Arbeitsfluid-Filters mit gewölbter Filterfläche;
Fig. 6:
ein konstruktives Detail zur Integration eines zweiten ArbeitsfluidFilters der Fig. 5 im Wärmetauscher gemäß einer zweiten Variante.
Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawing; this shows in:
1A, 1B:
a perspective view of a first preferred embodiment of a heat exchanger in a representation with diffuser connection line (A) and without diffuser connection line (B) for viewing the working fluid filter;
Fig. 2A, Fig. 2B:
a perspective view of a second preferred embodiment of a heat exchanger in a representation with diffuser connection line (A) and without diffuser connection line (B) for viewing the working fluid filter, in view I and enlarged in II;
3:
a perspective view of the structural details for the integration of a working fluid filter in the heat exchanger according to a first variant;
4:
a perspective view of a first working fluid filter of Fig. 3 with flat filter surface;
Fig. 5:
a perspective view of a second working fluid filter with a curved filter surface;
Fig. 6:
a constructive detail for the integration of a second working fluid filter of Fig. 5 in the heat exchanger according to a second variant.

Fig. 1A zeigt einen Wärmetauscher 10 in Form eines Niederdruckwärmetauschers zur Einbindung in ein Abgasrückführsystem stromabwärtig eines Partikelfilters und stromaufwärtig eines Verdichters für das Arbeitsfluid. Der Wärmetauscher 10 hat einen Wärmetauscherblock 11 mit einem Gehäuse 12 sowie einem im Gehäuse 12 aufgenommenen, nicht näher dargestellten Kern zur voneinander getrennten und wärmetauschenden Führung eines Arbeitsfluids AF und eines Kühlfluids KF. Das vom Kühlfluid KF durchströmbare Gehäuse 12 wird diesem über Eingangs- und Ausgangsstutzen 13.1, 13.2 zugeführt, wobei das Kühlfluid KF symbolisch durch Pfeile dargestellt ist. Das ebenfalls durch Pfeile symbolisch dargestellte Arbeitsfluid AF wird einer Anzahl von durchströmbaren Strömungskanälen 21 (Fig. 3) im Block zugeführt und so von Kühlfluid KF gekühlt. Das Arbeitsfluid AF wird dem Wärmetauscher 10 über eine erste Anschlussleitung 14.1 in Form einer Zuführleitung zugeführt und über eine zweite Anschlussleitung 14.2 in Form einer Abführleitung abgeführt. Die Anschlussleitung 14.1 weist vorliegend einen Diffusor 15, ein Dehnungselement 16 in Form eines Faltenbalges sowie einen stromaufwärtigen, vom Wärmetauscher abgewandten Anschlussflansch 17 und einen dem Wärmetauscher 10 zugewandten Anschlussflansch 18 auf. Gemäß dem Konzept der Erfindung ist in den Wärmetauscher 10 ein Arbeitsfluid-Filter 1 integriert, welcher zwischen dem Wärmetauscherblock 11 einerseits und der Anschlussleitung 14.1 andererseits angebracht ist, wobei die Anschlussleitung 14.1 am Wärmetauscherblock 11 angeschlossen ist. Dazu dient der dem Wärmetauscher 10 zugewandte Anschlussflansch 18 der Anschlussleitung 14.1. Der Diffusor 15 dient einer strömungsvergleichmäßigen Zuführung des Arbeitsfluids - vorliegend in Form von Abgas einer Diesel-Brennkraftmaschine - von der Anschlussleitung 14.1 und ist in Form eines trichterartigen Elements gebildet. Fig. 1A shows a heat exchanger 10 in the form of a low-pressure heat exchanger for incorporation into an exhaust gas recirculation system downstream of a particulate filter and upstream of a compressor for the working fluid. The heat exchanger 10 has a heat exchanger block 11 with a housing 12 and a housing 12, not shown core for separate and heat exchanging guidance of a working fluid AF and a cooling fluid KF. The housing 12 which can be flowed through by the cooling fluid KF is supplied to it via inlet and outlet ports 13.1, 13.2, wherein the cooling fluid KF is shown symbolically by arrows. The working fluid AF, which is also shown symbolically by arrows, is provided to a number of flow passages 21 (FIG. Fig. 3 ) fed in the block and thus cooled by cooling fluid KF. The working fluid AF is supplied to the heat exchanger 10 via a first connecting line 14.1 in the form of a feed line and discharged via a second connecting line 14.2 in the form of a discharge line. In the present case, the connection line 14.1 has a diffuser 15, an expansion element 16 in the form of a bellows and an upstream connecting flange 17 facing away from the heat exchanger and a connecting flange 18 facing the heat exchanger 10. According to the concept of the invention, a working fluid filter 1 is integrated in the heat exchanger 10, which is mounted between the heat exchanger block 11 on the one hand and the connecting line 14.1 on the other hand, wherein the connecting line 14.1 is connected to the heat exchanger block 11. The purpose of the heat exchanger 10 facing connecting flange 18 of the connecting line 14.1. The diffuser 15 serves one flow-equal supply of the working fluid - in the present case in the form of exhaust gas of a diesel internal combustion engine - from the connecting line 14.1 and is formed in the form of a funnel-like element.

Fig. 1 B zeigt den gleichen Wärmetauscher 10 ohne die Anschlussleitung 14.1, sodass der Arbeitsfluid-Filter 1 erkennbar ist. Der Arbeitsfluid-Filter 1 weist eine flache Filterfläche 2 sowie einen in Fig. 1A erkennbaren Flansch 3 auf, welcher Flansch 3 zwischen dem Anschlussflansch 18 der Anschlussleitung 14.1 und dem Gegenflansch 19 des Wärmetauscherblocks 11 mittels Schraubverbindungen S eingeklemmt ist. Fig. 1 B shows the same heat exchanger 10 without the connection line 14.1, so that the working fluid filter 1 can be seen. The working fluid filter 1 has a flat filter surface 2 and a in Fig. 1A recognizable flange 3, which flange 3 is clamped between the connecting flange 18 of the connecting line 14.1 and the mating flange 19 of the heat exchanger block 11 by means of screw S.

Vorliegend ist der Arbeitsfluid-Filter 1 mit einem Flansch 3 in Form einer metallischen Dichtungsmanschette gebildet, wobei die Filterfläche 2 in den Flansch 3 eingeschweißt ist. In einer vorliegend besonders vorteilhaften Weise ist somit der Arbeitsfluid-Filter 1 zum einen mit einer Filterfunktion und zum anderen mit einer Dichtungsfunktion versehen. Des Weiteren ist vorteilhaft die Filterfläche 2 nicht nur raumsparend flach ausgebildet, sondern lässt sich auch im trichterförmigen Innenraum des Trichters des Diffusors 15 effektiv unterbringen. Zudem ist die flache Ausbildung der Filterfläche 2 strömungsgünstig im Bereich der Vergleichmäßigung der Strömung des Arbeitsfluids, d.h. im trichterförmigen Innenraum des Diffusors 15, angeordnet. Die flache Filterfläche 2 wird axial vom Arbeitsfluid AF durchströmt, was einen besonders geringen Druckverlust zur Folge hat. Der in der vorliegenden Ausführungsform realisierte Arbeitsfluid-Filter 1 lässt sich nicht nur leicht austauschen, sondern darüber hinaus bei Bedarf dadurch dauerhaft entfernen, dass anstatt einer Dichtungsmanschette mit Filter, nämlich dem Arbeitsfluid-Filter 1, lediglich eine einfache Dichtungsmanschette ohne Filter eingesetzt wird.In the present case, the working fluid filter 1 is formed with a flange 3 in the form of a metallic sealing collar, wherein the filter surface 2 is welded into the flange 3. In a presently particularly advantageous manner thus the working fluid filter 1 is provided on the one hand with a filter function and on the other with a sealing function. Furthermore, the filter surface 2 is advantageously not only designed to save space in a space-saving manner, but can also be effectively accommodated in the funnel-shaped interior of the funnel of the diffuser 15. In addition, the flat design of the filter surface 2 is streamlined in the area of equalization of the flow of the working fluid, i. in the funnel-shaped interior of the diffuser 15, arranged. The flat filter surface 2 is flowed through axially by the working fluid AF, which results in a particularly low pressure loss. The realized in the present embodiment, the working fluid filter 1 can not only easily replace, but also if necessary permanently removed that instead of a gasket with filter, namely the working fluid filter 1, only a simple gasket without filter is used.

Fig. 2A und Fig. 2B zeigen analog eine zweite Ausführungsform eines Wärmetauschers 20 - wiederum in Fig. 2A mit einer Anschlussleitung 14.1 und in Fig. 2B ohne eine Anschlussleitung 14.1. In Fig. 2B ist darüber hinaus die Ansicht I auf den Arbeitsfluid-Filter 1 vergrößert in II dargestellt. Fig. 2A and Fig. 2B show analogously a second embodiment of a heat exchanger 20 - again in Fig. 2A with a connection line 14.1 and in Fig. 2B without a connecting cable 14.1. In Fig. 2B In addition, the view I on the working fluid filter 1 is shown enlarged in II.

Der Wärmetauscher 20 unterscheidet sich von dem Wärmetauscher 10 in der Anordnung der Eingangs- und Ausgangsstutzen 13.1, 13.2 für das Kühlfluid KF. Darüber hinaus ist die Anschlussleitung 14.1 als Zuführleitung als auch die Anschlussleitung 14.2 mit einem Diffusor 15.1, 15.2 eingerichtet ist.The heat exchanger 20 differs from the heat exchanger 10 in the arrangement of the inlet and outlet nozzles 13.1, 13.2 for the cooling fluid KF. In addition, the connection line 14.1 as a supply line and the connecting line 14.2 with a diffuser 15.1, 15.2 is set up.

Fig. 2B zeigt wiederum den Arbeitsfluid-Filter 1 mit einer flachen Filterfläche 2, welche axial durchströmt wird, und mit einem in Form einer Dichtungsmanschette ausgebildeten Flansch 3, der analog zu der Ausführungsform eines Wärmetauschers 10 in Fig. 1A, Fig. 1B, mit Schraubverbindungen S zwischen dem Anschlussflansch 18 der Anschlussleitung 14.1 und dem Gegenflansch 19 des Wärmetauscherblocks 11 eingeklemmt ist. Fig. 2B again shows the working fluid filter 1 with a flat filter surface 2, which is flowed through axially, and with a formed in the form of a gasket flange 3, which is analogous to the embodiment of a heat exchanger 10 in Fig. 1A, Fig. 1B , is clamped with screw S between the connection flange 18 of the connection line 14.1 and the mating flange 19 of the heat exchanger block 11.

Vorliegend ist auf der Arbeitsfluidausgangsseite des Wärmetauschers 20 eine Dichtungsmanschette 4 zwischen den dem Wärmetauscherblock 11 und der Anschlussleitung 14.2, nämlich den entsprechenden Flanschen der Ausgangsseite, eingeklemmt. Die Dichtungsmanschette 4 kann - bei Bedarf - ähnlich wie die Dichtungsmanschette 3 eine Filterfläche tragen oder ohne Filterfläche eingesetzt sein. In diesem Fall der Ausführungsform eines Wärmetauschers 20 lässt sich somit ein Arbeitsfluid-Filter 1 je nach Bedarf eingangsseitig des Wärmetauschers 20 als auch ausgangsseitig des Wärmetauschers 20 integrieren.In the present case, a gasket 4 is clamped between the heat exchanger block 11 and the connection line 14.2, namely the corresponding flanges of the outlet side, on the working fluid outlet side of the heat exchanger 20. The gasket 4 may - as needed - similar to the gasket 3 wear a filter surface or be used without a filter surface. In this case, the embodiment of a heat exchanger 20 can thus be a working fluid filter 1 as needed integrate the input side of the heat exchanger 20 and the output side of the heat exchanger 20.

Fig. 3 zeigt das konstruktive Detail eines in Fig. 1A, Fig. 1B gezeigten Wärmetauschers 10 ohne Gehäuse 12. Dadurch werden neben den - in Fig. 4 vergrößert und perspektivisch dargestellten Arbeitsfluid-Filter 1 - die Strömungskanäle 21 erkennbar, von denen einer repräsentativ als Flachrohr dargestellt ist. Die als Flachrohre ausgebildeten Strömungskanäle 21 werden jeweils in einem Boden 22 des Wärmetauscherkerns gehalten, welcher beispielsweise als Durchzüge ausgebildete Öffnungen 23 zur Aufnahme eines Flachrohres aufweist. Fig. 3 shows the constructive detail of a Fig. 1A, Fig. 1B shown heat exchanger 10 without housing 12. This will in addition to the - in Fig. 4 enlarged and perspectively illustrated working fluid filter 1 - the flow channels 21 recognizable, one of which is representatively represented as a flat tube. The flow channels 21 formed as flat tubes are each held in a bottom 22 of the heat exchanger core, which for example Having trained as passages openings 23 for receiving a flat tube.

Fig. 5 zeigt eine zum Arbeitsfluid-Filter 1 der Fig. 4 alternative Ausführung eines Arbeitsfluid-Filters 5.1 mit einer gewölbten Filterfläche 6 sowie einem einfachen Flansch 7, welcher darüber hinaus Öffnungen 8 aufweist. Diese können von zuvor genannten Schraubverbindungen S beim Einbau des Arbeitsfluid-Filters 5, beispielsweise in einen Wärmetauscher 10 oder in einen Wärmetauscher 20, durchsetzt werden. Die gewölbte Filterfläche 6 des Arbeitsfluid-Filters 5.1 hat den Vorteil, dass diese Diffusorfunktion übernehmen kann und somit zur Strömungsvergleichmäßigung beiträgt. Fig. 5 shows a to the working fluid filter 1 of Fig. 4 alternative embodiment of a working fluid filter 5.1 with a curved filter surface 6 and a simple flange 7, which also has openings 8. These can be penetrated by aforementioned screw connections S during installation of the working fluid filter 5, for example in a heat exchanger 10 or in a heat exchanger 20. The curved filter surface 6 of the working fluid filter 5.1 has the advantage that this can take over diffuser function and thus contributes to the flow equalization.

Eine beispielhafte Einbaumöglichkeit eines leicht modifizierten Arbeitsfluidfilters 5.2 an einer Ausgangsseite eines Wärmetauschers ist in Fig. 6 dargestellt. In Ansicht I der Fig. 6 ist ersichtlich, dass auch der Arbeitsfluid-Filter 5.2 axial durchströmt wird und über die gewölbte Filterfläche 6 eine diffusiorähnliche Wirkung für das Arbeitsfluid AF bewirkt wird. In Ansicht II ist vergrößert die im Bereich des Flansches 7 variierte Form des Arbeitsfluid-Filters 5.2 erkennbar. Der Arbeitsfluid-Filter 5.2 weist im Bereich des Flansches 7 eine Feder 9 auf, welche, wie aus Ansicht II der Fig. 6 ersichtlich, in eine Nut 29 eines Flansches 18 einer Anschlussleitung eingreift, sodass die Feder 9 in Eingriff in der Nut 29 eine Nut-Feder-Verbindung 24 zur Verfügung stellt. Die Nut-Feder-Verbindung 24 ermöglicht ein besonders sicheres und dennoch einfaches Integrieren des Arbeitsfluid-Filters 5.2 im Wärmetauscher.An exemplary installation possibility of a slightly modified working fluid filter 5.2 on an output side of a heat exchanger is in Fig. 6 shown. In view I the Fig. 6 It can be seen that the working fluid filter 5.2 is also flowed through axially and a diffuser-like effect for the working fluid AF is effected via the curved filter surface 6. In view II, the shape of the working fluid filter 5.2, which is varied in the region of the flange 7, can be seen enlarged. The working fluid filter 5.2 has in the region of the flange 7, a spring 9, which, as from view II of Fig. 6 can be seen engages in a groove 29 of a flange 18 of a connecting line, so that the spring 9 in engagement with the groove 29, a tongue and groove connection 24 is available. The tongue and groove connection 24 allows a particularly safe and yet easy integration of the working fluid filter 5.2 in the heat exchanger.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Arbeitsfluid-FilterWorking fluid filter
22
flache Filterflächeflat filter surface
33
Flanschflange
44
Dichtungsmanschettegasket
5.1, 5.25.1, 5.2
Arbeitsfluid-FilterWorking fluid filter
66
gewölbte Filterflächecurved filter surface
77
Flanschflange
88th
Lochhole
99
Federfeather
1010
Wärmetauscherheat exchangers
1111
Wärmetauscherblockheat exchanger block
1212
Gehäusecasing
13.113.1
Eingangsstutzen, StutzenInlet, neck
13.213.2
Ausgangsstutzen, StutzenOutlet nozzle, neck
14.114.1
Anschlussleitungconnecting cable
14.214.2
Anschlussleitungconnecting cable
15, 15.1, 15.215, 15.1, 15.2
Diffusordiffuser
1616
Dehnungselementexpansion element
1717
dem Wärmetauscher abgewandter Anschlussflanschthe connecting flange facing away from the heat exchanger
1818
dem Wärmetauscher zugewandter Anschlussflanschthe heat exchanger facing flange
1919
Gegenflanschcounterflange
2020
Wärmetauscherheat exchangers
2121
Strömungskanalflow channel
2222
Bodenground
2323
Öffnungenopenings
2424
Nut-Feder-VerbindungTongue and groove
2929
Nutgroove
KFKF
Kühlfluidcooling fluid
AFAF
Arbeitsfluidworking fluid
SS
Schraubverbindungenscrew

Claims (15)

Wärmetauscher (10, 20), insbesondere Niederdruckwärmetauscher, zum Wärmetausch zwischen einem Arbeitsfluid (AF) einerseits, insbesondere einem Abgas und/oder einer Ladeluft, und einem Kühlfluid (KF) andererseits, insbesondere einem Kühlmittel, und mit einem Arbeitsfluid-Filter (1, 5, 5.1, 5.2) wobei der Wärmetauscher (10, 20) aufweist: - einen Wärmetauscherblock (11) zur Umsetzung des Wärmetausches; - wenigstens eine Anschlussleitung (14.1, 14.2) für das Arbeitsfluid (AF); dadurch gekennzeichnet, dass zur Integration des Arbeitsfluid-Filters (1, 5, 5.1, 5.2) im Wärmetauscher (10, 20), der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) zwischen Wärmetauscherblock (11) einerseits und Anschlussleitung (14.1, 14.2) andererseits angebracht ist, wobei die Anschlussleitung (14.1, 14.2) am Wärmetauscherblock (11) angeschlossen ist. Heat exchanger (10, 20), in particular low-pressure heat exchanger, for heat exchange between a working fluid (AF) on the one hand, in particular an exhaust gas and / or a charge air, and a cooling fluid (KF) on the other hand, in particular a coolant, and with a working fluid filter (1, 5, 5.1, 5.2) wherein the heat exchanger (10, 20) comprises: - A heat exchanger block (11) for implementing the heat exchange; - At least one connecting line (14.1, 14.2) for the working fluid (AF); characterized in that for integration of the working fluid filter (1, 5, 5.1, 5.2) in the heat exchanger (10, 20), the working fluid filter (1, 5, 5.1, 5.2) between the heat exchanger block (11) on the one hand and connecting line (14.1 , 14.2) is mounted on the other hand, wherein the connecting line (14.1, 14.2) is connected to the heat exchanger block (11). Wärmetauscher (10, 20) nach Anspruch 1 dadurch gekennzeichnet, dass der Wärmetauscherblock (11) aufweist: - einen Kern zur voneinander getrennten und wärmetauschenden Führung des Arbeitsfluids (AF) und des Kühlfluids (KF); - ein den Kern aufnehmendes, von dem Kühlfluid (KF) durchströmbares Gehäuse (12);
wobei der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) zwischen Gehäuse (12) bzw. Kern einerseits und Anschlussleitung (14.1, 14.2) andererseits angebracht ist und wobei die Anschlussleitung (14.1, 14.2) am Gehäuse (12) bzw. Kern angeschlossen ist. Heat exchanger (10, 20) according to claim 1, characterized in that the heat exchanger block (11) comprises: - A core for separate and heat exchanging leadership of the working fluid (AF) and the cooling fluid (KF); - A core receiving, by the cooling fluid (KF) through-flow housing (12);
wherein the working fluid filter (1, 5, 5.1, 5.2) between the housing (12) or core on the one hand and connecting line (14.1, 14.2) on the other hand is mounted and wherein the connecting line (14.1, 14.2) on the housing (12) or core connected. Wärmetauscher (10, 20) nach Anspruch 1 oder 2 dadurch gekennzeichnet, dass die Anschlussleitung mit einem Anschlussflansch (18) gebildet ist, insbesondere mit einem Anschlussflansch (18) mit Diffusor (15, 15.1, 15.2).Heat exchanger (10, 20) according to claim 1 or 2, characterized in that the connection line is formed with a connection flange (18), in particular with a connection flange (18) with a diffuser (15, 15.1, 15.2). Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Anschlussleitung eine Zu- und/oder Abführleitung (14.1, 14.2) ist.Heat exchanger (10, 20) according to one of claims 1 to 3, characterized in that the connecting line is a supply and / or discharge line (14.1, 14.2). Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) auf Arbeitsfluideinlassseite des Wärmetauschers (10, 20) zwischen einem Gehäuse (12) und einer Zuführleitung (14.1) angebracht ist.Heat exchanger (10, 20) according to one of claims 1 to 4, characterized in that the working fluid filter (1, 5, 5.1, 5.2) on working fluid inlet side of the heat exchanger (10, 20) between a housing (12) and a supply line ( 14.1) is attached. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) auf Arbeitsfluidauslassseite des Wärmetauschers (10, 20) zwischen Gehäuse (12) und einer Abführleitung (14.2) angebracht ist.Heat exchanger (10, 20) according to one of claims 1 to 5, characterized in that the working fluid filter (1, 5, 5.1, 5.2) on Arbeitsfluidauslassseite of the heat exchanger (10, 20) between the housing (12) and a discharge line (14.2 ) is attached. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) eine Filterfläche (2) aufweist, die flach ausgebildet ist.Heat exchanger (10, 20) according to one of claims 1 to 6, characterized in that the working fluid filter (1, 5, 5.1, 5.2) has a filter surface (2) which is formed flat. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) eine Filterfläche (6) aufweist, die nicht-flach, insbesondere mit einer gewölbten Filterfläche (6), vorzugsweise mit einer kalottenförmigen Filterfläche (6), ausgebildet ist.Heat exchanger (10, 20) according to one of claims 1 to 7, characterized in that the working fluid filter (1, 5, 5.1, 5.2) has a filter surface (6), the non-flat, in particular with a curved filter surface (6 ), preferably with a dome-shaped filter surface (6) is formed. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) zur axialen Durchströmung ausgebildet ist.Heat exchanger (10, 20) according to one of claims 1 to 8, characterized in that the working fluid filter (1, 5, 5.1, 5.2) is designed for axial flow. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) einen Flansch (3, 7) aufweist, der zwischen einem Anschlussflansch (18) der Anschlussleitung (14.1, 14.2) und einem Gegenflansch (19) des Wärmetauscherblocks (11) angebracht ist.Heat exchanger (10, 20) according to one of claims 1 to 9, characterized in that the working fluid filter (1, 5, 5.1, 5.2) has a flange (3, 7) which between a connection flange (18) of the connecting line ( 14.1, 14.2) and a counter flange (19) of the heat exchanger block (11) is mounted. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Arbeitsfluid-Filter (1, 5, 5.1, 5.2) einen Flansch (3, 7) in Form einer Dichtungsmanschette, insbesondere in Form einer metallischen Dichtungsmanschette aufweist.Heat exchanger (10, 20) according to one of claims 1 to 10, characterized in that the working fluid filter (1, 5, 5.1, 5.2) has a flange (3, 7) in the form of a gasket, in particular in the form of a metallic gasket , Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass eine Filterfläche (2, 6) des Arbeitsfluid-Filters (1, 5, 5.1, 5.2) durch eine Fügeverbindung, insbesondere Schweißen und/oder Löten, oder einstückig oder kraftschlüssig, insbesondere klemmend, mit einem Flansch (3, 7) des Arbeitsfluid-Filters verbunden ist.Heat exchanger (10, 20) according to one of claims 1 to 11, characterized in that a filter surface (2, 6) of the working fluid filter (1, 5, 5.1, 5.2) by a joint connection, in particular welding and / or soldering, or integral or non-positive, in particular clamping, with a flange (3, 7) of the working fluid filter is connected. Wärmetauscher (10, 20) nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass ein Flansch (3, 7) des Arbeitsfluid-Filters (1, 5, 5.1, 5.2) mittels einer Nut-Feder Verbindung (24) zwischen einem Anschlussflansch (18) der Anschlussleitung (14.1, 14.2) und einem Gegenflansch (19) des Wärmetauscherkerns (11) angebracht istHeat exchanger (10, 20) according to one of claims 1 to 12, characterized in that a flange (3, 7) of the working fluid filter (1, 5, 5.1, 5.2) by means of a tongue and groove connection (24) between a connecting flange (18) of the connecting line (14.1, 14.2) and a counter flange (19) of the heat exchanger core (11) is mounted Abgasrückführsystem aufweisend: einen Partikelfilter für ein Arbeitsfluid (AF) stromabwärtig einer Arbeitsfluid-Auslassleitung einer Brennkraftmaschine; einen Wärmetauscher (10, 20) nach einem der vorhergehenden Ansprüche stromabwärtig des Partikelfilters; einen Verdichter für das Arbeitsfluid (AF) stromabwärtig des Wärmetauschers (10, 20) und stromaufwärtig vor einer Arbeitsfluid-Einlassleitung einer Brennkraftmaschine. Exhaust gas recirculation system comprising: a particulate filter for a working fluid (AF) downstream of a working fluid outlet conduit of an internal combustion engine; a heat exchanger (10, 20) according to any preceding claim downstream of the particulate filter; a compressor for the working fluid (AF) downstream of the heat exchanger (10, 20) and upstream of a working fluid inlet line of an internal combustion engine. Brennkraftmaschine, insbesondere Diesel-Brennkraftmaschine, mit einem Abgasrückführsystem nach Anspruch 14.Internal combustion engine, in particular diesel internal combustion engine, with an exhaust gas recirculation system according to claim 14.
EP13181477.4A 2009-07-10 2009-07-10 Heat exchanger, exhaust gas recirculation system and internal combustion engine Not-in-force EP2667007B1 (en)

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CN102619648B (en) * 2012-03-21 2014-06-04 浙江银轮机械股份有限公司 Plate-fin EGR (Exhaust Gas Recirculation) cooler with heat insulation function
DE102013208436A1 (en) 2013-05-08 2014-11-13 MAHLE Behr GmbH & Co. KG exhaust gas cooler
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ES2531124B1 (en) 2013-09-10 2016-01-22 Valeo Térmico, S. A. Heat exchanger for gases, especially the exhaust gases of an engine
EP2955362B1 (en) * 2014-06-10 2017-08-30 Borgwarner Emissions Systems Spain, S.L.U. Integrated exhaust gas management device
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