EP2559962B1 - Exhaust gas heat exchanger - Google Patents
Exhaust gas heat exchanger Download PDFInfo
- Publication number
- EP2559962B1 EP2559962B1 EP12180174.0A EP12180174A EP2559962B1 EP 2559962 B1 EP2559962 B1 EP 2559962B1 EP 12180174 A EP12180174 A EP 12180174A EP 2559962 B1 EP2559962 B1 EP 2559962B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- cooling medium
- heat exchanger
- tube bundle
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002826 coolant Substances 0.000 claims description 89
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 65
- 238000002485 combustion reaction Methods 0.000 description 15
- 238000009826 distribution Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- 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
- F28F9/005—Other auxiliary members within casings, e.g. internal filling means or sealing means
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- 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
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
-
- 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
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
Definitions
- the WO 2011/061090 A2 discloses an exhaust gas heat exchanger according to the preamble of claim 1.
- the coolant guide device has at least one spacer which extends at an angle ⁇ 90 °, starting from an edge of the coolant guide device, which lies opposite the bottom, in the direction of the bottom.
- the approximately planar shielding element covers a circular arc of the cylinder-like Abgasumlenkmaschine containing the lowest point, wherein the shielding connected at its ends to the Abgasumlenkmaschine, in particular welded or soldered is.
- the exhaust gas flows around the shielding element from all sides. Characterized in that the condensate is heated on the shielding by the exhaust gas, it is again transferred to the gaseous state and can leave the engine with the exhaust gas without further damage.
- At least two exhaust gas inlet nozzles are present. Even with the use of more than two exhaust inlet connection components are saved with collecting function before the exhaust gas heat exchanger.
- Several supply lines can be guided directly from the engine to the exhaust gas heat exchanger, which is particularly useful when the engine consists of two engine blocks, each of which engine block an exhaust pipe is fed to the exhaust gas heat exchanger.
- Thedeffenleit wisdom 5 is thus arranged between the tube bundle and the housing 2, wherein theisserendorfleit styles 5 completely surrounds the tube bundle.
- Such an exhaust gas heat exchanger 1 is connected to the internal combustion engine, so that the exhaust gases take the shortest possible way to the exhaust gas heat exchanger 1.
- a spacer 10, 11, 12, 13 is formed. Of these four spacers 10, 11, 12, 13 are each formed two mirror-symmetrical to each other and extend from the edge of thedestoffleit responded 5 in the direction of a bottom 16 (FIG. FIG. 3 ), which closes the housing 2.
- the attached at the edge of thedeatorileit Vietnamese 5 and flat spacers 10, 11, 12, 13 are bent starting from the edge of thedestoffleit responded 5 by less than 90 ° inwards and touch with their ends the bottom 16, whereby thedestoffleit responded 5 on the Floor 16 is fixed. Since thechenleit responded 5 is fixed with the corners 23 of its cross-section at the same time on the housing 2, a stable positioning of thehariffenleit styles 5 is realized within the housing 2 of the exhaust gas heat exchanger 1.
- Such an exhaust gas heat exchanger 1 is connected to the internal combustion engine, wherein the exhaust gases emitted by the internal combustion engine flow into the tubes 15 of the tube bundle, which is mounted within the coolant guide device 5.
- the coolant inlet 3 is connected to the channels 6 and 7, wherein behind the coolant inlet 3 in the direction of the exhaust gas outlet, thedeffenleit responded 5 opposite the coolant outlet 4 is closed.
- FIG. 1b can be seen where the completion of thehariffenleit Sk 5 is realized by bent ends 14.
- the exhaust heat exchanger 1 is provided with an exhaust diverter 17, and the exhaust diverter 17, which is also called a diffuser, is disposed on the exhaust heat exchanger 1 near the coolant inlet pipe 3a and the coolant outlet pipe 4a, respectively.
- the Abgasumlenk ancient University 17 is also cylindrical, so that it adapts well to the shape of the housing 2.
- the cooled exhaust gas which has passed through the tubes 15 of the tube bundle, forwarded to the turbocharger. The forwarding of the cooled exhaust gas takes place via the pipe 21st
- the tubes 15 have a rectangular cross section, wherein the cross section of theisserschleit Anlagen 5 is adapted to the outer contour of the tube bundle, which also has an octagonal cross-section.
- the housing 2 is closed off via the bottom 16 arranged on the exhaust gas inlet side, wherein the tubes 15 pass through the bottom 16 and are designed to be open towards the outside.
- the exhaust gas which is emitted by the internal combustion engine can easily flow into the pipes 15 and thus into the exhaust gas heat exchanger 1.
Description
Die Erfindung betrifft einen Abgaswärmeübertrager, umfassend ein Rohrbündel mit abgasführenden Rohren sowie ein, von einem Kühlmittel durchströmtes Gehäuse, welches das Rohrbündel umschließt und einen Kühlmitteleinlass und einen Kühlmittelauslass aufweist.The invention relates to an exhaust gas heat exchanger, comprising a tube bundle with exhaust-carrying tubes and a through-flow of a coolant housing, which encloses the tube bundle and having a coolant inlet and a coolant outlet.
Abgaswärmeübertrager werden vorzugsweise in Kraftfahrzeugen eingesetzt, wo sie an dem Verbrennungsmotor angeordnet sind, das heiße, vom Verbrennungsmotor abgeführte Abgas abkühlen und dem Verbrennungsmotor wieder zuführen. Es sind Abgaswärmeübertrager bekannt, welche ein Rohrbündel mit Abgasrohren aufweisen, das von einem Gehäuse umschlossen ist, durch welches ein Kühlmittel fließt. Dabei wird die Wärme des Abgases an das Kühlmittel abgegeben. Das Kühlmittel gelangt durch einen Kühlmitteleinlass in das Innere des Gehäuses und verlässt nach Durchströmen des Rohrbündels über einen, ebenfalls am Gehäuse ausgebildeten Kühlmittelauslass den Abgaswärmeübertrager.Exhaust heat exchangers are preferably used in motor vehicles, where they are arranged on the internal combustion engine, cool the hot, exhausted from the engine exhaust and feed the internal combustion engine again. Exhaust gas heat exchangers are known, which have a tube bundle with exhaust pipes, which is enclosed by a housing through which a coolant flows. The heat of the exhaust gas is released to the coolant. The coolant passes through a coolant inlet into the interior of the housing and leaves after flowing through the tube bundle via a, also formed on the housing coolant outlet the exhaust gas heat exchanger.
Aus Bauraumgründen kann es notwendig sein, dass der Kühlmitteleinlass nahe dem Kühlmittelauslass angeordnet ist. Durch diese Konstruktion wird ein Kurzschluss der Kühlmittelströmung innerhalb des Gehäuses erzeugt, was zur Folge hat, dass keine optimale Kühlmittelverteilung über das gesamte Rohrbündel ermöglicht wird.For reasons of space, it may be necessary for the coolant inlet to be arranged near the coolant outlet. By this construction, a short circuit of the coolant flow is generated within the housing, with the result that no optimal coolant distribution over the entire tube bundle is made possible.
Um einen solchen Kurzschluss zu unterbinden, ist es bekannt, eindimensionale Einlegebleche in das Gehäuse einzuführen, welche das Gehäuse in Längsrichtung in zwei Kammern teilt. Somit wird das Kühlmittel innerhalb des Abgaswärmeübertragers in den Kammern geleitet. Insbesondere beim Einsatz von eckigen Rohren, die das ebenfalls eckige Rohrbündel bilden, in nicht eckige Gehäuse entstehen Kanäle, durch die das Kühlmittel strömen kann, dabei aber das Rohrbündel nicht optimal umströmt. Somit existieren Teile des Rohrbündels, in welchen das Abgas durch das Kühlmittel nicht optimal gekühlt wird. Das Kühlmittel strömt aufgrund des geringen Widerstands bevorzugt durch diese nicht abgeschlossenen Kanäle, welche einen undefinierten Bypass bilden. Die eindimensionalen Einlegebleche können dabei die sich bildenden Kühlmittelkanäle nicht schließen. Dadurch ist eine gleichmäßige Kühlmittelversorgung des Rohrbündels nicht gewährleistet. Dies führt zu einer eingeschränkten Leistung des Abgaswärmeübertragers.In order to prevent such a short circuit, it is known to introduce one-dimensional insert plates into the housing, which divides the housing into two chambers in the longitudinal direction. Thus, the coolant is passed within the Abgaswärmeübertragers in the chambers. In particular, when using square pipes, which also form the square tube bundle, in non-angular housing channels are formed through which the coolant can flow, but the tube bundle does not flow around optimally. Thus, there are parts of the tube bundle in which the exhaust gas is not optimally cooled by the coolant. Due to the low resistance, the coolant preferably flows through these unfilled channels, which form an undefined bypass. The one-dimensional insert sheets can not close the forming coolant channels. As a result, a uniform coolant supply of the tube bundle is not guaranteed. This leads to a limited performance of the exhaust gas heat exchanger.
Die
Der Erfindung liegt somit die Aufgabe zugrunde, einen Abgaswärmeübertrager anzugeben, bei welchem unabhängig von der Position des Kühlmitteleinlasses bzw. des Kühlmittelauslasses das Kühlmittel optimal durch den Abgaswärmeübertrager geleitet wird, so dass eine optimale Kühlmittelverteilung über das gesamte Rohrbündel gewährleistet wird.The invention is therefore based on the object to provide an exhaust gas heat exchanger, in which regardless of the position of the coolant inlet and the coolant outlet, the coolant is optimally passed through the exhaust gas heat exchanger, so that an optimal coolant distribution over the entire tube bundle is ensured.
Erfindungsgemäß wird die Aufgabe mit den Merkmalen von Anspruch 1 gelöst.According to the invention the object is achieved with the features of
Dies hat den Vorteil, dass das Kühlmittel zunächst in einem Kühlmittelkanal an dem Rohrbündel vorbei geleitet wird und anschließend auf dem Rückwege dem Rohrbündel zugeführt wird, wobei das Kühlmittel alle Rohre des Rohrbündels gleichmäßig erfasst. Dadurch wird eine gleichmäßige Kühlmittelversorgung ermöglicht, wodurch eine optimale Leistung des Abgaswärmeübertragers gewährleistet wird. Dies erfolgt unabhängig von den Positionen des Kühlmitteleinlasses und des Kühfmittefauslasses. Insbesondere, wenn die Rohre des Rohrbündels einen eckigen Querschnitt aufweisen, die in ein nicht eckiges Gehäuse eingesetzt werden, werden durch die dreidimensionale Kühlmittelleiteinrichtung die Kanäle verschlossen, die zu unkontrollierten Bypässen führen können. Ein Kurzschluss im Kühlmittelkreislauf wird somit sicher verhindert. Die dreidimensionale Kühlmittelleiteinrichtung dient als Separator für das Kühlmittel und wird je nachdem, wie der Kühlmitteleinlass bzw. der Kühlmittelauslass zueinander liegen, so konstruiert, dass eine optimale Kühlmittelströmung im Abgaswärmeübertrager gewährleistet ist.This has the advantage that the coolant is first passed in a coolant channel past the tube bundle and is then supplied to the tube bundle on the return path, wherein the coolant all tubes of the Tube bundle detected evenly. As a result, a uniform coolant supply is made possible, whereby an optimal performance of the exhaust gas heat exchanger is ensured. This is done independently of the positions of the coolant inlet and the coolant outlet. In particular, if the tubes of the tube bundle have a polygonal cross section, which are used in a non-angular housing, the three-dimensional Kühlmittelleiteinrichtung the channels are closed, which can lead to uncontrolled bypasses. A short circuit in the coolant circuit is thus reliably prevented. The three-dimensional Kühlmittelleiteinrichtung serves as a separator for the coolant and is depending on how the coolant inlet and the coolant outlet to each other, so constructed that an optimal coolant flow is ensured in the exhaust gas heat exchanger.
Erfindungsgemäß umfasst die Kühlmittelleiteinrichtung das Rohrbündel vollständig, wobei annähernd senkrecht zu dem Kühlmittelkanal mit einem vorgegebenen Abstand zu der Kühlmittelleiteinrichtung, ein, das Gehäuse verschließender Boden ausgebildet ist. Durch den Boden, in welchen die abgasführenden Rohre eingelassen sind, wird sichergestellt, dass das Kühlmittel, welches über den Kühlmitteleinlass und den, außerhalb des Rohrbündels verlaufenden Kühlmittelkanal in das Gehäuse fließt, in Richtung der Rohre um etwa 180° umgelenkt wird. Auf dem Weg zum Kühlmittelauslass umspült das Kühlmittel alle abgasführenden Rohre gleichmäßig. Dadurch wird eine definierte Führung des Kühlmittelflusses gewährleistet.According to the invention the Kühlmittelleiteinrichtung the tube bundle completely, wherein approximately perpendicular to the coolant channel with a predetermined distance to the Kühlmittelleiteinrichtung, a, the housing occlusive bottom is formed. Through the bottom, in which the exhaust-gas-carrying tubes are embedded, it is ensured that the coolant, which flows into the housing via the coolant inlet and the coolant channel extending outside the tube bundle, is deflected in the direction of the tubes by approximately 180 °. On the way to the coolant outlet, the coolant flows evenly around all the exhaust pipes. This ensures a defined guidance of the coolant flow.
Erfindungsgemäß weist die Kühlmittelleiteinrichtung mindestens einen Abstandshalter auf, welcher sich in einem Winkel < 90° ausgehend von einem, dem Boden gegenüber liegenden Rand der Kühlmittelleiteinrichtung in Richtung des Bodens erstreckt. Mittels dieses flächigen Abstandshalters wird die Kühlmittelleiteinrichtung an dem Boden fixiert, wodurch eine stabile Halterung der Kühlmittelleiteinrichtung innerhalb des Abgaswärmeübertragers gewährleistet wird. Gleichzeitig wird durch den Abstandshalter das Umlenken der Kühlflüssigkeit in Richtung der, das Abgas führenden Rohre unterstützt.According to the invention, the coolant guide device has at least one spacer which extends at an angle <90 °, starting from an edge of the coolant guide device, which lies opposite the bottom, in the direction of the bottom. By means of this flat spacer, the Kühlmittelleiteinrichtung is fixed to the ground, thereby ensuring a stable support of the Kühlmittelleiteinrichtung within the Abgaswärmeübertragers becomes. At the same time, the deflecting of the cooling liquid in the direction of the pipes carrying the exhaust gas is assisted by the spacer.
Erfindungsgemäß weist die Kühlmitteleiteinrichtung einen mehreckigen Querschnitt auf, wobei die Ecken des Querschnittes der Kühlmittelleiteinrichtung das Gehäuse berühren. Die Ecken übernehmen somit die Aufgabe einer breiten Befestigung der Kühlmittelleiteinrichtung an dem Gehäuse. Nach dem Einlegen der Kühlmittelleiteinrichtung in das Gehäuse des Abgaswärmeübertragers wird die Kühlmittelleiteinrichtung mit Hilfe der Ecken an dem Gehäuse positioniert und gleichzeitig am Boden mit den Abstandshaltern fixiert. Des Weiteren verschließt die Kühlmittelleiteinrichtung durch ihre Kontur die Kanäle, die durch den Einsatz der rechteckigen Rohre im nicht eckigen Gehäuse entstehen. Dadurch wird eine optimale Kühlmittelströmung in dem Rohrbündel erreicht, wodurch der Abgaswärmeübertrager eine optimale Leistung erzielt.According to the invention, the coolant-conducting device has a polygonal cross-section, wherein the corners of the cross-section of the coolant-conducting device touch the housing. The corners thus assume the task of a wide attachment of the Kühlmittelleiteinrichtung to the housing. After inserting the Kühlmittelleiteinrichtung in the housing of the exhaust gas heat exchanger, the Kühlmittelleiteinrichtung is positioned by means of the corners on the housing and at the same time fixed to the ground with the spacers. Furthermore, the Kühlmittelleiteinrichtung closes by their contour the channels that arise through the use of rectangular tubes in the non-angular housing. As a result, an optimal coolant flow is achieved in the tube bundle, whereby the exhaust gas heat exchanger achieves optimum performance.
Vorteilhafterweise ist an dem Gehäuse in Abgasauslassrichtung eine Abgasumlenkeinheit angeordnet, deren tiefste Stelle innen von einem Abschirmelement überspannt ist. Dadurch wird sichergestellt, dass ein Kondensat, welches sich insbesondere bei Stillstand des Verbrennungsmotors absetzen kann und im negativsten Fall bei sehr kalten Außentemperaturen gefroren als Festkörper auftritt, nicht an der tiefsten und kühlsten Stelle anlagert und durch das Abgas mitgeführt werden kann. Durch das Abschirmelement, auf welchem sich das Kondensat absetzt, wird das Kondensat solange auf Grund seiner zentralen Positionierung im Abgas bei Betrieb des Verbrennungsmotors erwärmt, bis das Kondensat verdampft und im gasförmigen Zustand aus dem Abgaswärmeübertrager transportiert wird. Beschädigungen des Verbrennungsmotors bzw. des, dem Verbrennungsmotor vorgelagerten Turboladers infolge von kleinsten Kondensattropfen bzw. Eispartikeln werden somit zuverlässig verhindert. Eine Funktionsuntüchtigkeit des gesamten Verbrennungsmotors durch den Aufprall des Kondensats auf den Turbolader wird ausgeschlossen. Ein Weitertransport des Kondensats in Form eines Festkörpers in dem heißen Abgas wird zuverlässig unterbunden.Advantageously, a Abgasumlenkeinheit is arranged on the housing in the exhaust gas outlet, the lowest point is inside spanned by a shielding. This ensures that a condensate, which can settle especially at standstill of the engine and frozen in the worst case at very cold outside temperatures occurs as a solid, not at the deepest and coolest point attaches and can be carried by the exhaust. Due to the shielding element on which the condensate settles, the condensate is heated as long as due to its central positioning in the exhaust gas during operation of the internal combustion engine until the condensate is evaporated and transported in the gaseous state from the exhaust gas heat exchanger. Damage to the internal combustion engine or of the internal combustion engine upstream turbocharger due to smallest condensate droplets or ice particles are thus reliably prevented. A malfunction of the entire internal combustion engine due to the impact of the condensate on the Turbocharger is excluded. Further transport of the condensate in the form of a solid in the hot exhaust gas is reliably prevented.
In einer anderen Ausführungsform überdeckt das annähernd eben ausgebildete Abschirmelement einen Kreisbogen der zylinderähnlich ausgebildeten Abgasumlenkeinheit, die die tiefste Stelle enthält, wobei das Abschirmelement an seinen Enden mit der Abgasumlenkeinheit verbunden, insbesondere verschweißt oder verlötet, ist. Durch eine solche brückenähnliche Ausbildung des Abschirmelementes umströmt das Abgas das Abschirmelement von allen Seiten. Dadurch, dass das Kondensat auf dem Abschirmelement durch das Abgas erwärmt wird, wird es wieder in den gasförmigen Zustand überführt und kann mit dem Abgas den Verbrennungsmotor verlassen, ohne dass weitere Schäden auftreten.In another embodiment, the approximately planar shielding element covers a circular arc of the cylinder-like Abgasumlenkeinheit containing the lowest point, wherein the shielding connected at its ends to the Abgasumlenkeinheit, in particular welded or soldered is. By means of such a bridge-like design of the shielding element, the exhaust gas flows around the shielding element from all sides. Characterized in that the condensate is heated on the shielding by the exhaust gas, it is again transferred to the gaseous state and can leave the engine with the exhaust gas without further damage.
In einer Weiterbildung weist das Abschirmelement an den, der Abgasumlenkeinheit innen gegenüber liegenden Enden Fixierelemente zur Befestigung des Abschirmelementes an der Abgasumlenkeinheit auf. Das erfindungsgemäße Abschirmelement ist konstruktiv einfach und kostengünstig herstellbar. Konstruktive Maßnahmen an dem Gehäuse der Abgasumlenkeinheit, um einen Abtransport des Kondensats zu verhindern, können somit unterbleiben.In a further development, the shielding element has fixing elements for securing the shielding element to the exhaust deflecting unit at the ends lying opposite the exhaust-deflecting unit. The shielding element according to the invention is structurally simple and inexpensive to produce. Constructive measures on the housing of the Abgasumlenkeinheit to prevent removal of the condensate can thus be omitted.
In einer Variante sind die Abgasumlenkeinheit und das Abschirmelement einstückig als Gussteil ausgebildet. Dies ermöglicht eine besonders kostengünstige Herstellung, da in einem Verfahrensschritt gleichzeitig zwei Bauteile hergestellt werden, wobei das Abschirmelement integraler Bestandteil der Abgasumlenkeinheit ist.In a variant, the exhaust deflecting unit and the shielding element are integrally formed as a cast part. This allows a particularly cost-effective production, since two components are produced simultaneously in one process step, wherein the shielding is an integral part of the Abgasumlenkeinheit.
In einer Ausgestaltung sind mindestens zwei Abgasaustrittsstutzen, vorzugsweise an der Abgasumlenkeinheit, ausgebildet. Durch die Anordnung von mindestens zwei Abgasaustrittsstutzen kann das Abgas gleichzeitig an mehrere Leitungen abgeführt werden. Die Verwendung von mehreren Abgasaustrittsstutzen verhindert den Einsatz von zusätzlichen Bauteilen mit einer Sammel- bzw. Verteilerfunktion nach dem Abgaswärmeübertrager, um zu realisieren, dass das, den Abgaswärmeübertrager verlassende Abgas aufgeteilt und in verschiedene Richtungen des Kraftfahrzeuges gelenkt wird. Somit entstehen Kostenvorteile, da Bauteile mit Verteilerfunktion entfallen. Durch die gezielte Anbringung der Abgasaustrittsstutzen kann auf die Geschwindigkeitsverteilung und Temperaturverteilung des Abgases im und nach dem Abgaswärmeübertrager Einfiuss genommen werden.In one embodiment, at least two exhaust gas outlet nozzles, preferably on the Abgasumlenkeinheit formed. Due to the arrangement of at least two exhaust gas outlet, the exhaust gas can simultaneously several lines are discharged. The use of multiple exhaust spouts prevents the use of additional components having a manifold function after the exhaust gas heat exchanger to realize that the exhaust gas exiting the exhaust gas heat exchanger is split and directed in different directions of the motor vehicle. This results in cost advantages, since components with distributor function omitted. The targeted attachment of the exhaust outlet can be taken on the velocity distribution and temperature distribution of the exhaust gas in and after the exhaust gas heat exchanger.
In einer Variante sind mindestens zwei Abgaseintrittsstutzen vorhanden. Auch bei der Verwendung von mehr als zwei Abgaseintrittsstutzen werden Bauteile mit Sammelfunktion vor dem Abgaswärmeübertrager eingespart. Mehrere Zuleitungen können dabei direkt vom Verbrennungsmotor an den Abgaswärmeübertrager geführt werden, was insbesondere dann sinnvoll ist, wenn der Verbrennungsmotor aus zwei Motorblöcken besteht, wobei von jedem Motorblock eine Abgasleitung dem Abgaswärmeübertrager zugeführt wird.In one variant, at least two exhaust gas inlet nozzles are present. Even with the use of more than two exhaust inlet connection components are saved with collecting function before the exhaust gas heat exchanger. Several supply lines can be guided directly from the engine to the exhaust gas heat exchanger, which is particularly useful when the engine consists of two engine blocks, each of which engine block an exhaust pipe is fed to the exhaust gas heat exchanger.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Eine davon soll anhand der in der Zeichnung dargestellten Figuren näher erläutert werden.The invention allows numerous embodiments. One of them will be explained in more detail with reference to the figures shown in the drawing.
Es zeigt:
- Figur 1:
- schematische Darstellung eines Abgaswärmeübertragers mit einer Kühlmitteleiteinrichtung
- Figur 2:
- Querschnitt durch den Abgaswärmeübertrager gemäß
Figur 1 - Figur 3:
- schematische Darstellung eines Abgaswärmeübertragers mit einem Abschirmelement
- Figur 4:
- Abgaswärmeübertrager mit zwei Abgasaustrittsstutzen.
- FIG. 1:
- schematic representation of a Abgaswärmeübertragers with a Kühlmitteleiteinrichtung
- FIG. 2:
- Cross section through the exhaust gas heat exchanger according to
FIG. 1 - FIG. 3:
- schematic representation of a Abgaswärmeübertragers with a shielding
- FIG. 4:
- Exhaust heat exchanger with two exhaust gas outlet.
Gleiche Merkmale sind mit gleichen Bezugszeichen gekennzeichnet.Identical features are identified by the same reference numerals.
In den
In
Der achteckige Querschnitt der Kühlmittelleiteinrichtung 5 bildet zwischen dem Gehäuse 2 und der Kühlmittelleiteinrichtung 5 zwei Kühlmittelkanäle 6 und 7, indem die Rundung des Gehäuses 2 durch eine ebene Fläche der Kühlmittelleiteinrichtung 5 übergedeckt wird. Die Kanäle 6 und 7 liegen sich dabei gegenüber. Die außerhalb des Rohrbündels angeordneten Kanäle 6, 7 dienen zur Einführung des Kühlmittels in das Gehäuse 2.The octagonal cross section of the
In einem Winkel von 90° zu den Kanälen 6 und 7 weist die Kühlmittelleiteinrichtung 5 zwei Kanalabschlüsse 8 und 9 auf, welche ebenfalls gegenüberliegend ausgebildet sind und freie Räume, die sich zwischen dem Gehäuse 2 und der Kühlmittelleiteinrichtung 5 gebildet haben, abschließen. Damit wird verhindert, dass das Kühlmittel durch diese freien Räume fließen kann. Durch die gerichtete Gestaltung der Kanäle 6 und 7 wird eine kontrollierte Führung des Kühlmittels durch das Gehäuse 2 realisiert.At an angle of 90 ° to the
Darüber hinaus ist jeweils zwischen einem der Kanäle 6 bzw. 7 und einem Kanalabschluss 8, 9 der Kühlmittelleiteinrichtung 5 ein Abstandhalter 10, 11, 12, 13 ausgebildet. Von diesen vier Abstandshaltern 10, 11, 12, 13 sind jeweils zwei spiegelsymmetrisch zueinander ausgebildet und erstrecken sich vom Rand der Kühlmittelleiteinrichtung 5 in Richtung eines Bodens 16 (
Ein solcher Abgaswärmeübertrager 1 ist an den Verbrennungsmotor angeschlossen, wobei die von dem Verbrennungsmotor abgegebenen Abgase in die Rohre 15 des Rohrbündels strömen, welches innerhalb der Kühlmittelleiteinrichtung 5 gelagert ist. Der Kühlmitteleinlass 3 ist mit den Kanälen 6 und 7 verbunden, wobei hinter dem Kühlmitteleinlass 3 in Richtung des Abgasauslasses die Kühlmittelleiteinrichtung 5 gegenüber dem Kühlmittelauslass 4 verschlossen ist. Dies ist insbesondere aus
In den
Wie aus
Die Abgasumlenkeinheit 17 weist in der Nähe ihres tiefsten Punktes ein Abschirmelement 18 auf. Dieses Abschirmelement 18 ist eben ausgebildet, so dass es den tiefsten Punkt der zylindrisch ausgestalteten Abgasumlenkeinheit 17 überspannt. Das Abschirmelement 18 weist an seinen Rändern zwei Fixierelemente 19, 20 auf, welche der Innenkontur der Abgasumlenkeinheit 17 angepasst sind, wobei diese Fixierelemente 19, 20 mit der Abgasumlenkeinheit 17 verlötet oder verschweißt sind. In
Wenn der Verbrennungsmotor abgeschaltet ist und abkühlt, sammelt sich Kondensat auf dem Abschirmelement 18 der Abgasumlenkeinheit 17. Bei kalten Außentemperaturen kann ein solches Kondensat auch als Festkörper in Form von Eis gefrieren. Aufgrund der Ablage und Positionierung des Kondensates auf dem Abschirmelement 18 wird beim Einschalten des Verbrennungsmotors das Abgas um das Kondensat herumgeführt, wobei das Abgas nicht bloß oberhalb des Abschirmelementes 18 sondern auch unterhalb des Abschirmelementes 18 entlang geführt wird. Dadurch wird das Kondensat erwärmt und nimmt wieder einen gasförmigen Zustand an. In diesem gasförmigen Zustand kann das Kondensat von allein aus dem Abgaswärmeübertrager 1 abfließen.When the internal combustion engine is switched off and cools, condensate collects on the shielding
Gemäß den
Claims (7)
- An exhaust gas heat exchanger, comprising a tube bundle with exhaust gas guiding tubes (15) and a housing (2) through which a cooling medium flows and which surrounds the tube bundle and has a cooling medium inlet (3) and a cooling medium outlet (4), wherein at least one three-dimensional cooling medium guiding device (5) is formed between the tube bundle and the housing (2) for adjusting a cooling medium channel (6, 7), wherein the cooling medium inlet (3) opens into the cooling medium channel (6, 7), wherein the cooling medium guiding device (5) fully comprises the tube bundle, wherein approximately perpendicular to the cooling medium channel (6, 7), with a predetermined distance to the cooling medium guiding device (5), a bottom (16) closing the housing (2) is formed and the cooling medium guiding device (5) has a polygonal cross-section, wherein the corners (23) of the cross-section of the cooling medium guiding device (5) touch the housing (2), wherein the cooling medium is first guided past the tube bundle in a cooling medium channel and is then delivered to the tube bundle on the way back, wherein the cooling medium enters all tubes of the tube bundle in a uniform manner, characterised in that the cooling medium guiding device (5) has at least one spacer (10, 11, 12, 13) with a planar configuration which extends in an angle < 90° starting from an edge of the cooling medium guiding device (5) opposite the bottom (16) in the direction of the bottom (16) and thus touches the bottom (16) with its end, whereby the cooling medium guiding device (5) is fixed to the bottom (16).
- The exhaust gas heat exchanger according to claim 1, characterised in that an exhaust gas deflection unit (17) is arranged at the housing (2) in the exhaust gas outlet direction, whose deepest point is spanned by a cover element (18) in the inside.
- The exhaust gas heat exchanger according to claim 2, characterised in that the cover element (18) with the approximately flat configuration covers a circular arc of the exhaust gas deflection unit (17) formed in a cylinder-like manner which contains the deepest point, wherein the ends of the cover element (18) are connected, in particular welded or soldered to the exhaust gas deflection unit (17).
- The exhaust gas heat exchanger according to claim 2 or 3, characterised in that the ends of the cover element (18) opposite the exhaust gas deflection unit (17) in the inside have fixation elements (19, 20) in order to secure the cover element (18) on the exhaust gas deflection unit (17).
- The exhaust gas heat exchanger according to claim 2, 3 or 4, characterised in that the exhaust gas deflection unit (17) and the cover element (18) are integrally formed as one cast piece.
- The exhaust gas heat exchanger according to at least one of the preceding claims, characterised in that at least two exhaust gas outlet nozzles (21, 23) are formed, preferably on the exhaust gas deflection unit (17) .
- The exhaust gas heat exchanger according to claim 6, characterised in that at least two exhaust gas inlet nozzles are provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011081031A DE102011081031A1 (en) | 2011-08-16 | 2011-08-16 | Exhaust gas heat exchanger |
Publications (3)
Publication Number | Publication Date |
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EP2559962A2 EP2559962A2 (en) | 2013-02-20 |
EP2559962A3 EP2559962A3 (en) | 2014-04-09 |
EP2559962B1 true EP2559962B1 (en) | 2018-10-03 |
Family
ID=47002589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12180174.0A Active EP2559962B1 (en) | 2011-08-16 | 2012-08-10 | Exhaust gas heat exchanger |
Country Status (2)
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EP (1) | EP2559962B1 (en) |
DE (1) | DE102011081031A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013008773B4 (en) * | 2013-05-23 | 2020-06-10 | Modine Manufacturing Company | Heat exchanger and method of manufacturing a heat exchanger |
DE102014202447A1 (en) | 2014-02-11 | 2015-08-13 | MAHLE Behr GmbH & Co. KG | Exhaust gas heat exchanger |
DE102014208093A1 (en) * | 2014-04-29 | 2015-10-29 | Mahle Lnternational Gmbh | Heat exchanger |
DE102014225159A1 (en) | 2014-12-08 | 2016-06-09 | Mahle International Gmbh | Heat exchanger |
DE102014226883A1 (en) | 2014-12-22 | 2016-06-23 | Mahle International Gmbh | Heat exchanger |
DE102017208324A1 (en) * | 2017-05-17 | 2018-11-22 | Mahle International Gmbh | Heat exchanger |
DE102017218254A1 (en) | 2017-10-12 | 2019-04-18 | Mahle International Gmbh | Exhaust gas heat exchanger |
DE102019209603A1 (en) * | 2019-07-01 | 2021-01-07 | Mahle International Gmbh | Exhaust gas heat exchanger |
DE102021208792A1 (en) | 2021-08-11 | 2023-02-16 | Mahle International Gmbh | Heat exchanger, in particular a tube bundle heat exchanger |
DE102022209984A1 (en) | 2022-09-22 | 2024-03-28 | Mahle International Gmbh | Heat exchanger |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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CA1121799A (en) * | 1978-08-17 | 1982-04-13 | Maurice R. Garrison | Heat exchanger of the tube and plate type |
DE29622411U1 (en) * | 1996-12-24 | 1997-02-13 | Behr Gmbh & Co | Heat exchangers, in particular exhaust gas heat exchangers |
JP5250924B2 (en) * | 2001-07-16 | 2013-07-31 | 株式会社デンソー | Exhaust heat exchanger |
KR100649597B1 (en) * | 2004-12-10 | 2006-11-28 | 엘지전자 주식회사 | Exhaust gas heat exchanger for cogeneration system |
US20070235173A1 (en) * | 2006-04-10 | 2007-10-11 | Aaf-Mcquary Inc. | Shell and tube evaporator |
DE102006029043B4 (en) * | 2006-06-24 | 2015-04-23 | Pierburg Gmbh | Heat transfer unit for an internal combustion engine |
NZ561669A (en) * | 2006-09-21 | 2008-07-31 | P W R Performance Products Pty | A heat exchanger |
JP2008297993A (en) * | 2007-05-31 | 2008-12-11 | Komatsu Ltd | Egr cooler |
DE102008002746A1 (en) * | 2007-07-11 | 2009-02-12 | Visteon Global Technologies Inc., Van Buren | Heat exchanger for the exhaust system of a motor vehicle, method for producing a heat exchanger and assembly tool for this purpose |
WO2009108238A2 (en) * | 2007-12-06 | 2009-09-03 | Modine Manufacturing Company | Recuperative heat exchanger and method of operating the same |
DE102008025862A1 (en) * | 2008-05-29 | 2009-01-22 | Daimler Ag | Exhaust gas system for internal combustion engine of utility vehicle, has end pipe with inner wall including cladding element, where cladding element is formed from temperature resistant material based on temperature of exhaust gas |
ES2394406B1 (en) * | 2009-11-18 | 2013-10-23 | Valeo Térmico, S.A. | HEAT EXCHANGER FOR GASES, ESPECIALLY EXHAUST GASES FROM AN ENGINE. |
-
2011
- 2011-08-16 DE DE102011081031A patent/DE102011081031A1/en not_active Withdrawn
-
2012
- 2012-08-10 EP EP12180174.0A patent/EP2559962B1/en active Active
Non-Patent Citations (1)
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DE102011081031A1 (en) | 2013-02-21 |
EP2559962A3 (en) | 2014-04-09 |
EP2559962A2 (en) | 2013-02-20 |
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