EP1857761B1 - Heat exchange device for combustion engines - Google Patents
Heat exchange device for combustion engines Download PDFInfo
- Publication number
- EP1857761B1 EP1857761B1 EP07107408.2A EP07107408A EP1857761B1 EP 1857761 B1 EP1857761 B1 EP 1857761B1 EP 07107408 A EP07107408 A EP 07107408A EP 1857761 B1 EP1857761 B1 EP 1857761B1
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- European Patent Office
- Prior art keywords
- duct
- flow
- fluid
- heat transfer
- transfer unit
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
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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
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
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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
- F02M26/29—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
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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
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
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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
- F02M26/38—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in parallel
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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
- F28D7/0008—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 for one medium being in heat conductive contact with the conduits for the other medium
- F28D7/0025—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 for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
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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
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
- F28D7/0083—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids with units having particular arrangement relative to a supplementary heat exchange medium, e.g. with interleaved units or with adjacent units arranged in common flow of supplementary heat exchange medium
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
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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
- 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
- F28D2021/0089—Oil coolers
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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
- 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
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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
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/06—Derivation channels, e.g. bypass
Definitions
- This advantage can also be enhanced by additionally controlling the fluid mass flow of the second fluid via a control direction.
- the exhaust duct 2 can be bypassed by closing the control device 15, so that in this phase, the flap 16 is in the open position and hot exhaust can flow through the bypass channel 5 uncooled.
- the control valve 11 is preferably closed, so that no coolant flows through the heat transfer unit and thus only takes place heating of the oil, the volume flow can be controlled in this phase by means of the control device 13.
Description
Die Erfindung betrifft eine Wärmeübertragungseinheit für Verbrennungskraftmaschinen mit einem Gehäuse, in dem zumindest ein erster von einem ersten zu kühlenden Fluid durchströmbarer Kanal angeordnet ist, zumindest ein von einem zweiten Fluid durchströmbarer Kanal angeordnet ist und zumindest ein von einem Kühlmittel durchströmbarer Kanal angeordnet ist sowie eine Wärmeübertragungseinheit für den Ölkreislauf einer Verbrennungskraftmaschine mit einem Öl durchströmbaren Kanal und zumindest einem von einem Kühlmittel durchströmbaren Kanal, wobei der Öl durchströmbare Kanal in Wärme leitendem Kontakt zum vom Kühlmittel durchströmbaren Kanal steht.The invention relates to a heat transfer unit for internal combustion engines with a housing in which at least a first channel through which a fluid to be cooled is arranged, at least one channel through which a second fluid can pass and at least one channel through which a coolant can pass, and a heat transfer unit for the oil circuit of an internal combustion engine with an oil-permeable channel and at least one channel through which a coolant can flow, wherein the oil-permeable channel is in heat-conducting contact with the channel through which the coolant can flow.
Derartige kombinierte Wärmeübertragungseinheiten sind aus dem Stand der Technik bekannt und werden beispielsweise dazu genutzt, in einer Einheit sowohl die Ladeluft als auch einen Abgasstrom zu kühlen, oder beispielsweise eine Schmierölkühlung entweder einzeln oder in einem Gehäuse mit einer Ladeluftkühlung oder Abgaskühlung anzuordnen. Durch die Kühlung des Abgases oder auch der Ladeluft wird die Verbrennungstemperatur gesenkt, wodurch wiederum der Anteil der Stickoxide im Abgas reduziert werden kann.Such combined heat transfer units are known from the prior art and are used, for example, to cool in a unit both the charge air and an exhaust gas flow, or to arrange, for example, a lubricating oil cooling either individually or in a housing with a charge air cooling or exhaust gas cooling. By cooling the exhaust gas or the charge air, the combustion temperature is lowered, which in turn can reduce the proportion of nitrogen oxides in the exhaust gas.
So wird in der
Des Weiteren ist es bekannt, dass in der Warmlaufphase des Verbrennungsmotors ein hoher Schadstoffanteil entsteht, weswegen in modernen Verbrennungskraftmaschinen häufig ein den Abgaskühler umgehender Bypasskanal ausgebildet ist, mit dessen Hilfe eine schnellere Aufheizung der Verbrennungskraftmaschine durch das ungekühlt zurückgeführte Abgas erreicht wird.Furthermore, it is known that in the warm-up phase of the internal combustion engine, a high pollutant content arises, which is why in modern internal combustion engines often bypassing the exhaust gas cooler bypass channel is formed, with the aid of a faster heating of the internal combustion engine is achieved by the uncooled recirculated exhaust gas.
So wird beispielsweise in der
Auf diese Weise wird es möglich, ein Temperaturmanagement in der Verbrennungskraftmaschine durchzuführen, wodurch eine schnellere Aufheizung der Verbrennungskraftmaschine realisiert wird. Des weiteren kann nach der Warmlaufphase zur Reduzierung der ausgestoßenen Schadstoffe eine Temperaturführung des zurückgeführten Abgases und somit auch der Verbrennungstemperaturen realisiert werden.In this way it becomes possible to carry out a temperature management in the internal combustion engine, whereby a faster heating of the internal combustion engine is realized. Furthermore, after the warm-up phase to reduce the emitted pollutants, a temperature control of the recirculated exhaust gas and thus also the combustion temperatures can be realized.
Es besteht jedoch weiterhin das Problem einer trotz des vorhandenen Bypasses relativ langen Aufwärmphase insbesondere bei wenig Wärme erzeugenden Turbodieselmotoren. Insbesondere bestehen Probleme bei integrierten Wärmetauschern wie beispielsweise bei dem Ölabgaswärmetauscher der
Des Weiteren ist aus der
Aus der
Die
Zusätzlich ist aus der
Aufgabe der Erfindung ist es daher, eine Wärmeübertragungseinheit zu schaffen, mit der ein wirkungsvolles Temperaturmanagement in der Verbrennungskraftmaschine betrieben werden kann, wobei gleichzeitig der Platzbedarf minimiert werden soll. In einer speziellen Anwendung für den Ölkreislauf einer Verbrennungskraftmaschine soll auf die zurzeit in Turbodieselmotoren verwendeten Zuheizer vollständig verzichtet werden können. Hierdurch soll im Vergleich zu bekannten Ausführungsformen die einen hohen Schadstoffanteil generierende Warmlaufphase weiter verkürzt werden.The object of the invention is therefore to provide a heat transfer unit with which an effective temperature management can be operated in the internal combustion engine, at the same time the space requirement should be minimized. In a special application for the oil circuit of an internal combustion engine is to be completely dispensed with the heater currently used in turbo diesel engines. This should be further reduced in comparison to known embodiments, the high pollutant content generating warm-up phase.
Diese Aufgabe wird dadurch gelöst, dass der zumindest eine von dem zweiten Fluid durchströmbare Kanal zwischen dem Bypasskanal und dem vom Kühlmittel beströmbaren Kanal angeordnet ist. Dadurch wird erreicht, dass je nach Durchströmung des Bypasskanals und des Kühlmittel durchströmbaren Kanals das zweite Fluid wahlweise entweder erwärmt oder gekühlt werden kann, und auf gerigem Raum eine Temperaturregelung auch in einem kombinierten Kühler ermöglicht wird.This task is solved by in that the at least one channel through which the second fluid can flow is arranged between the bypass channel and the channel which can be flowed through by the coolant. This ensures that, depending on the flow through the bypass channel and the coolant through-flow channel, the second fluid can either be heated or cooled selectively, and in a room geriger room temperature control is also possible in a combined cooler.
Im speziellen Fall einer Wärmeübertragungseinheit für den Ölkreislauf einer Verbrennungskraftmaschine wird diese Aufgabe dadurch gelöst, dass ein Abgas durchströmbarer Kanal ausgebildet ist, der in Wärme leitendem Kontakt zum von einem Kühlmittel durchströmbaren Kanal steht, so dass eine schnelle Aufheizung des Öls durch den warmen Abgasstrom erreicht wird und nach der Warmlaufphase das Abgas gekühlt werden kann. Vorzugsweise ist der eine Abgas durchströmbare Kanal ein Bypasskanal eines Abgaskühlers.In the special case of a heat transfer unit for the oil circuit of an internal combustion engine, this object is achieved in that an exhaust gas flow-through channel is formed, which is in heat-conducting contact to the flowed through by a coolant channel, so that a rapid heating of the oil is achieved by the warm exhaust gas flow and after the warm-up phase, the exhaust gas can be cooled. Preferably, the channel through which an exhaust gas can flow is a bypass channel of an exhaust gas cooler.
In einer vorteilhaften Ausführungsform ist der Fluidmassehstrom des ersten zu kühlenden Fluids in den Bypasskanal und den ersten von dem ersten zu kühlenden Fluid durchströmbaren Kanal über zumindest eine Regeleinrichtung steuerbar. Somit wird eine Temperatursteuerung sowohl des ersten zu kühlenden Fluids als auch des zweiten Fluids möglich.In an advantageous embodiment, the fluid mass flow of the first fluid to be cooled in the bypass channel and the first channel through which the first fluid to be cooled can be controlled via at least one control device. Thus, temperature control of both the first fluid to be cooled and the second fluid becomes possible.
In einer bevorzugten Ausführungsform ist der Fluidmassenstrom des ersten zu kühlenden Fluids in den Bypasskanal und den ersten von dem ersten zu kühlenden Fluids durchströmbaren Kanal über zwei Ventile regelbar, wovon das erste Ventil im Bereich eines Abgaseintrittsstutzens im Gehäuse vor dem ersten vom zu kühlenden Fluid durchströmbaren Kanal angeordnet ist und das zweite Ventil im Bereich des Abgaseintrittsstutzens im Gehäuse vor dem Bypasskanal angeordnet ist.In a preferred embodiment, the fluid mass flow of the first fluid to be cooled in the bypass channel and the first channel through which the first fluid to flow to be controlled via two valves, of which the first valve in the region of an exhaust inlet nozzle in the housing before the first channel to be cooled by the fluid to be cooled is arranged and the second valve is arranged in the region of the exhaust gas inlet nozzle in the housing in front of the bypass channel.
Derartige Ventile können beispielsweise klappenförmig ausgebildet sein und über elektromotorische Stelleinheiten abhängig oder unabhängig voneinander geregelt werden. Eine Temperatursteuerung ist somit einfach möglich.Such valves may be formed, for example, flap-shaped and controlled by electromotive actuators dependent or independent of each other. A temperature control is thus easily possible.
Ein optimaler Wärmeübergang zwischen den Medien wird dadurch erzielt, dass der von dem Kühlmittel durchströmbare Kanal eine erste gemeinsame Trennwand mit dem vom ersten zu kühlenden Fluid durchströmbaren Kanal aufweist und eine zweite gemeinsame Trennwand mit dem vom zweiten Fluid durchströmbaren Kanal aufweist. Die beiden gemeinsamen Trennwände dienen somit direkt als Wärmebrücken zwischen den Medien.An optimal heat transfer between the media is achieved in that the channel through which the coolant can flow has a first common partition wall with the channel through which the first fluid to be cooled flows and a second common partition wall with the channel through which the second fluid can flow. The two common partitions thus serve directly as thermal bridges between the media.
Eine derartig ebenfalls verbesserte Wärmeübertragung zur schnelleren Temperaturerhöhung des zweiten Fluids ergibt sich, wenn der Bypasskanal eine gemeinsame Trennwand mit dem vom zweiten Fluid durchströmbaren Kanal aufweist. Hat somit das erste Fluid eine höhere Temperatur als das zweite Fluid wird eine Aufheizung des zweiten Fluids bei Durchströmung des Bypasskanals entstehen.Such a likewise improved heat transfer for faster temperature increase of the second fluid results when the bypass channel has a common partition wall with the channel through which the second fluid can flow. Thus, if the first fluid has a higher temperature than the second fluid, heating of the second fluid will occur when the bypass channel flows through.
In einer bevorzugten Ausführungsform umgibt der vom Kühlmittel durchströmbare Kanal den vom ersten zu kühlenden Fluid durchströmbaren Kanal im Querschnitt vollständig. Hierdurch wird eine optimierte Kühlung des ersten zu kühlenden Fluids sichergestellt.In a preferred embodiment, the channel through which the coolant can flow completely surrounds the channel through which the first fluid to be cooled can flow. This ensures optimized cooling of the first fluid to be cooled.
Vorzugsweise ragen in zumindest einen der Kanäle von zumindest einem der Trennwände Rippen hinein. Diese verbessern zusätzlich deutlich den Wärmeübergang der Medien untereinander. Insbesondere bei Ausbildung der Rippen in den Gas führenden Kanälen ergeben sich hierdurch große Vorteile bezüglich des Wärmeübergangs. Es sind dabei sowohl durchgängige Rippen entlang der Strömungsrichtung denkbar als auch unterbrochene Einzelrippen.Preferably, ribs protrude into at least one of the channels of at least one of the partitions. These also significantly improve the heat transfer between the media. In particular, with formation of the ribs in the gas-conducting channels, this results in great advantages in terms of heat transfer. Both continuous ribs along the flow direction are conceivable as well as interrupted single ribs.
In einer weiterführenden Ausführungsform ist auch der Kühlmittelstrom über eine Regeleinrichtung steuerbar, so dass dieser während der Warmlaufphase komplett ausgestellt werden kann, wodurch eine deutlich schnellere Aufheizung des zweiten Fluids erreicht werden kann.In a further embodiment, the coolant flow is controllable via a control device, so that it can be completely exhibited during the warm-up phase, whereby a much faster heating of the second fluid can be achieved.
Dieser Vorteil kann auch dadurch verstärkt werden, dass zusätzlich der Fluidmassenstrom des zweiten Fluids über eine Regelrichtung steuerbar ist.This advantage can also be enhanced by additionally controlling the fluid mass flow of the second fluid via a control direction.
In einer bevorzugten Anwendung ist das erste zu kühlende Fluid Abgas und das zweite Fluid Öl. Dies bedeutet, dass in der Kaltstartphase der Abgas durchströmbare Kanal umgangen wird und das über den Bypasskanal strömende Abgas zur schnelleren Aufheizung des Öls in der kombinierten Wärmeübertragungseinheit genutzt werden kann. Bei Vollast kann das Kühlmittel sowohl zur Kühlung des Abgases als auch zur Kühlung des Öls in der Wärmeübertragungseinheit genutzt werden.In a preferred application, the first fluid to be cooled is exhaust and the second fluid is oil. This means that in the cold start phase, the exhaust gas flow through channel is bypassed and the exhaust gas flowing through the bypass channel can be used for faster heating of the oil in the combined heat transfer unit. At full load, the coolant can be used both for cooling the exhaust gas and for cooling the oil in the heat transfer unit.
In einer kostengünstig herstellbaren Ausführungsform ist die Wärmeübertragungseinheit aus Druckgussteilen hergestellt, welche durch Reibrührschweißen miteinander verbunden sind.In an embodiment that can be produced cost-effectively, the heat transfer unit is produced from die-cast parts which are connected to one another by friction stir welding.
Zur weiteren Bauraumreduzierung kann die Wärmeübertragungseinheit zumindest teilweise in den Zylinderkopf integriert werden.To further reduce space, the heat transfer unit can be at least partially integrated into the cylinder head.
Es wird deutlich, dass durch eine derartig aufgebaute Wärmeübertragungseinheit ein optimales Temperaturmanagement der Verbrennungskraftmaschine möglich wird und die Aufheizphase der Verbrennungskraftmaschine im Vergleich zu bekannten Ausführungsformen deutlich reduziert werden kann. Zusätzlich kann der Zuheizer bei Turbodieselmotoren entfallen. Mit der Erfindung werden diese Vorteile auf geringstem Bauraum und mit geringen Kosten realisiert.It is clear that an optimal temperature management of the internal combustion engine is possible by a heat transfer unit constructed in this way and the heating phase of the internal combustion engine can be significantly reduced in comparison to known embodiments. In addition, the heater can be omitted in turbodiesel engines. With the invention, these advantages are realized in the smallest space and at low cost.
Ein Ausführungsbeispiel ist in den Zeichnungen dargestellt und wird nachfolgend beschrieben.
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zeigt einen Querschnitt durch eine erfindungsgemäße Wärmeübertragungseinheit in geschnittener Darstellung.Figur 1 -
zeigt einen Längsschnitt durch die erfindungsgemäße Wärmeübertragungseinheit derFigur 2 im Bereich des Einlasses.Figur 1
-
FIG. 1 shows a cross section through a heat transfer unit according to the invention in a sectional view. -
FIG. 2 shows a longitudinal section through the heat transfer unit of the inventionFIG. 1 in the area of the inlet.
Zum besseren Verständnis wird das Ausführungsbeispiel gemäß der
Die erfindungsgemäße Wärmeübertragungseinheit besteht entsprechend der
Die einzelnen Kanäle 2, 3, 4, 5 sind jeweils über gemeinsame Trennwände voneinander getrennt, so dass eine erste gemeinsame Trennwand 6 zwischen dem Kühlmittel durchströmbaren Kanal 4 und dem Abgas durchströmbaren Kanal 2 angeordnet ist, eine zweite gemeinsame Trennwand 7 zwischen dem Kühlmittel durchströmbaren Kanal 4 und dem von Öl durchströmbaren Kanal 3 angeordnet ist sowie eine dritte gemeinsame Trennwand 8 zwischen dem Bypasskanal 5 und dem von Öl durchströmten Kanal 3 angeordnet ist. Auf diese Art und Weise werden unterschiedliche Wärmetauscherflächen zwischen den verschiedenen Medien realisiert. So erfolgt ein Wärmeaustausch über die gemeinsame Trennwand 8 zwischen Abgas und Öl, über die Trennwand 7 zwischen dem Öl und dem Kühlmittel und über die Trennwand 6 zwischen dem Abgas und dem Kühlmittel.The
In die Kanäle 2, 3, 5 ragen in Hauptströmungsrichtung verlaufende Rippen 9, welche sowohl als einteilige Längsrippe ausgeführt werden können als auch als mehrere hintereinander und nebeneinander liegende Einzelrippen ausgeführt werden können. Diese Rippen 9 ragen in vorliegendem Ausführungsbeispiel sowohl in den Bypasskanal 5 als auch in den Öl durchströmten Kanal 3 und den Abgas durchströmten Kanal 2, wobei sowohl in den Abgas durchströmten Kanal 2 als auch in den Öl durchströmten Kanal 3 die Rippen von zwei entgegengesetzten Seiten hineinragen. Dies bedeutet für den Abgas durchströmbaren Kanal 2 eine deutliche Verbesserung des Wärmeübergangs, da über die beidseitige Verrippung der Wärmeübergang durch das umgebende Kühlmittel deutlich verbessert wird. Für den Bereich des Öl durchströmbaren Kanals 3 bedeutet die Verrippung, das sowohl der Wärmeübergang vom Kühlmittel zum Öl durch die an der Trennwand 7 ausgebildeten Rippen 9 verbessert wird als auch der Wärmeübergang durch die an der Trennwand 8 ausgebildeten Rippen 9 vom Bypasskanal 5 verbessert werden kann.In the
Des Weiteren ist zu erkennen, dass der Kühlmittel durchströmbare Kanal 4 einen in
Auch der Öl durchströmbare Kanal 3 weist im vorliegenden Beispiel einen seitlich angeordneten Öleintrittsstutzen 12 auf, wobei wiederum an der entgegengesetzten Seite, also im hinteren Bereich des Öl durchströmbaren Kanals 3 ein entsprechender Austrittsstutzen angeordnet ist. Auch hier ist im Bereich des Öleintrittsstutzens 12 eine Regeleinrichtung 13 zur Volumenstromregelung des Öls in Form eines Steuerventils angeordnet.Also, the oil flow-through
In
Der Öl durchströmbare Kanal ist an seinem zum Abgaseintrittsstutzen 14 weisenden Ende durch eine Wand 17 verschlossenen. Diese Wand 17 sowie die mit der Wand 17 verbundenen Trennwände 6 und 8 unterteilen in Strömungsrichtung des Abgases gesehen die Wärmetauschereinheit im Bereich des Abgaseintrittsstutzens 14 in die Abgas führenden Kanäle 2 und 5. Entsprechend dienen die Trennwand 6 und das Gehäuse 1 als Anschlagflächen für die Klappe 15 zum Verschluss des Kanals 2 und die Wand 17 und das Gehäuse 1 als Anschlagflächen für die Klappe 16 zum Verschluss des Bypasskanals 5.The oil flow-through channel is closed at its end facing the exhaust
Ein entsprechend ausgebildeter nicht dargestellter Abgasaustrittsstutzen ist an der in Strömungsrichtung des Abgases entgegengesetzter Seite der Wärmeübertragungseinheit angeordnet, jedoch ohne Klappen, wobei es ebenfalls möglich wäre die Klappen 15, 16 an entsprechenden Positionen am Austrittsstutzen anzuordnen.A suitably trained exhaust outlet not shown is arranged on the opposite in the flow direction of the exhaust gas side of the heat transfer unit, but without flaps, and it would also be possible to arrange the
Im Folgenden wird beispielhaft eine Möglichkeit zur Steuerung einer derartigen Wärmeübertragungseinheit in der Warmlaufphase einer Verbrennungskraftmaschine beschrieben.In the following, a possibility for controlling such a heat transfer unit in the warm-up phase of an internal combustion engine will be described by way of example.
Bei Kaltstart der Verbrennungskraftmaschine ist es erwünscht, die Temperatur des Schmieröls zur Verringerung der Reibung und der Emissionen möglichst schnell zu erhöhen. Dies dient zusätzlich zum größeren Komfort des Fahrgastes im Winter bei einer Kopplung zur Heizung der Fahrgastzelle.When cold starting the internal combustion engine, it is desirable to increase the temperature of the lubricating oil as quickly as possible to reduce friction and emissions. This is in addition to the greater comfort of the passenger in the winter in a coupling to the heating of the passenger compartment.
Beim Kaltstart kann der Abgaskanal 2 durch Schließen der Regeleinrichtung 15 umgangen werden, so dass sich in dieser Phase die Klappe 16 in geöffneter Stellung befindet und heißes Abgas ungekühlt durch den Bypasskanal 5 strömen kann. Durch diesen Abgasstrom und die Verbindung des Bypasskanals 5 zum Ölkanal 3 über die Trennwand 8 bewirkt der Abgasstrom eine schnelle Aufheizung des Öls im Öl führenden Kanal 3. Zu diesem Zeitpunkt wird vorzugsweise das Steuerventil 11 geschlossen, so dass kein Kühlmittel durch die Wärmeübertragungseinheit strömt und somit lediglich eine Erwärmung des Öls stattfindet, dessen Volumenstrom in dieser Phase mittels der Regeleinrichtung 13 geregelt werden kann.During cold start, the
Nach dieser Warmlaufphase kann die Klappe 16 geschlossen und die Klappe 15 geöffnet werden, so dass nun der Abgasstrom zur Verringerung der bei der Verbrennung entstehenden Stickoxide über den Abgaskanal 2 geleitet wird und kein Abgas mehr in den Bypasskanal 5 gelangt. Gleichzeitig wird das Steuerventil 11 geöffnet, so dass der Abgaskanal 2 nun Kühlmittel umströmt ist und der Ölkanal 3 einen wärmeleitenden Kontakt über die Trennwand 7 zum Kühlmittelkanal 4 erhält. Es wird deutlich, dass der Ölkanal 3 bei einer derartigen Anordnung je nach Schaltung der Regeleinrichtungen 15, 16 sowohl die Funktion eines Ölkühlers als auch eines Ölerwärmers übernehmen kann.After this warm-up phase, the
Im weiteren Verlauf nach Beendigung der Warmlaufphase kann abhängig von den Motorkenndaten und der anliegenden Motorlast eine weiterführende Regelung mittels der Regeleinrichtungen 11, 15, 16 erfolgen, um eine weitergehende Schadstoffminimierung zu erhalten.In the further course after completion of the warm-up phase, depending on the engine characteristics and the applied engine load, a further control by means of the
Die angegebenen einfachen Bauformen verdeutlichen, dass es möglich ist, einen derartigen Kühler im Druckgussverfahren aus mehreren Teilen herzustellen und diese über einen Reibrührschweißverfahren zu verbinden.The stated simple forms illustrate that it is possible to produce such a cooler in the die-casting of several parts and to connect them via a friction stir welding.
Es wird deutlich, dass durch eine derartige Ausführung einer Wärmeübertragungseinheit mit kombiniertem Abgas- und Ölkühler und Bypass zur Ölerwärmung der Schadstoffausstoß eines Fahrzeugs deutlich reduziert werden kann, nicht zuletzt dadurch, dass die Warmlaufphase deutlich verkürzt wird. Auf einen Zuheizer kann vollständig verzichtet werden, so dass die Anzahl verwendeter Bauteile deutlich reduziert wird.It is clear that by such a design of a heat transfer unit with combined exhaust and oil cooler and bypass for oil heating of the pollutant emissions of a vehicle can be significantly reduced, not least by the fact that the warm-up phase is significantly reduced. A heater can be completely eliminated, so that the number of used components is significantly reduced.
Es sollte klar sein, dass je nach gewünschtem Temperaturmanagement und verwendeten Medien auch eine andere Anordnung der Kanäle zueinander denkbar ist, wobei insbesondere dadurch ein Platzvorteil erzielt wird, dass an einem Kanal, im vorliegenden Ausführungsbeispiel der Kanal 3, sowohl eine Erwärmung als auch eine Kühlung stattfinden kann.It should be clear that, depending on the desired temperature management and media used, a different arrangement of the channels to each other is conceivable, in particular by a space advantage is achieved that at a channel, in the present embodiment, the
Selbstverständlich ist die Erfindung nicht auf die dargestellte Ausführungsform beschränkt. So kann auch eine Wärmeübertragungseinheit geschaffen werden bei der lediglich der Öl durchströmbare Kanal sowohl durch Kühlmittel gekühlt als auch durch das Abgas erwärmt wird. Auch Änderungen der Gestaltungen der durchströmten Kanäle beispielsweise in Form von Platten- oder Rohrbündeln sind selbstverständlich ebenso denkbar wie eine unterschiedliche Positionierung der Ein- und Ausgangsstutzen.Of course, the invention is not limited to the illustrated embodiment. Thus, a heat transfer unit can be created in which only the oil-traversable channel is cooled by both coolant and heated by the exhaust gas. Also, changes in the designs of the flow-through channels, for example in the form of plate or tube bundles are of course also conceivable as a different positioning of the input and output nozzle.
Claims (14)
- A heat transfer unit for internal combustion engines- having a housing (1) in whichwherein a bypass duct (5) for the first fluid to be cooled is formed in the housing (1), via which duct the at least one first duct (2), through which the first fluid to be cooled flows, can be bypassed,- at least a first duct (2) is arranged through which a first fluid to be cooled flows,- at least a second duct (3) is arranged through which a second fluid can flow,- and at least one duct (4) is arranged through which a coolant can flow,
characterized in that the at least one duct (3), through which the second fluid can flow, is arranged between the bypass duct (5) and the duct (4) through which the coolant can flow. - The heat transfer unit for internal combustion engines of claim 1, characterized in that the fluid mass flow of the first fluid to be cooled can be controlled by means of at least one control means (15, 16) to flow into the bypass duct (5) and the first duct (2) through which the first fluid to be cooled can flow.
- The heat transfer unit for internal combustion engines of claim 2, characterized in that the fluid mass flow of the first fluid to be cooled can be controlled by two valves (15, 16) to flow into the bypass duct (5) and the first duct (2), through which the first fluid to be cooled can flow, the first valve (15) being arranged in the region of an exhaust gas inlet port (14) in the housing (1) upstream of the first duct (2), through which the fluid to be cooled can flow, and the second valve (16) being arranged in the region of the exhaust gas inlet port (14) in the housing (1) upstream of the bypass duct (5).
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the duct (4), through which the coolant can flow, shares a first partitioning wall (6) with the duct (2), through which the first fluid to be cooled can flow, and shares a second partitioning wall (7) with the duct (3) through which the second fluid may flow.
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the bypass duct (5) shares a partitioning wall (8) with the duct (3) through which the second fluid can flow.
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the duct (4), through which the coolant flows, fully surrounds the duct (2), through which the first fluid to be cooled can flow, when seen in cross section.
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that ribs (3) protrude from at least one of the partitioning walls (6, 7, 8) into at least one of the ducts (2, 3, 4, 5).
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the coolant flow can be controlled via a control means (11).
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the fluid mass flow of the second fluid can be controlled via a control means (13).
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the first fluid to be cooled is exhaust gas and the second fluid is oil.
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the heat transfer is built from diecast parts joined by friction stir welding.
- The heat transfer unit for internal combustion engines of one of the preceding claims, characterized in that the heat transfer unit is adapted to be integrated at least partly in a cylinder head.
- A heat transfer unit for the oil circuit of an internal combustion engine
comprising a duct (3), through which oil can flow, and at least one duct (4) through which a coolant can flow, wherein the duct (3), through which oil can flow, is in thermally conductive contact with the duct (4) through which coolant can follow, wherein a duct (5), through which exhaust gas can flow, is formed in the heat transfer unit, which duct is in thermally conductive contact with the duct (3), through which oil can flow,
characterized in that the heat transfer unit is further formed with a duct (2), through which exhaust gas can flow, which duct is in thermally conductive contact with the duct (4), through which the coolant can flow. - A heat transfer unit for the oil circuit of an internal combustion engine of claim 13, characterized in that the duct (5), through which exhaust gas can flow, is the bypass duct (5) of an exhaust gas heat transfer unit (2, 4).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006023809A DE102006023809B3 (en) | 2006-05-20 | 2006-05-20 | Heat transfer unit for oil circulation system of turbo diesel engine, has channels streamed by respective fluids and arranged in housing, and by-pass channel arranged in housing, where one of channels is by-passed by by-pass channel |
Publications (3)
Publication Number | Publication Date |
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EP1857761A2 EP1857761A2 (en) | 2007-11-21 |
EP1857761A3 EP1857761A3 (en) | 2011-12-28 |
EP1857761B1 true EP1857761B1 (en) | 2015-11-04 |
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Family Applications (1)
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EP07107408.2A Not-in-force EP1857761B1 (en) | 2006-05-20 | 2007-05-03 | Heat exchange device for combustion engines |
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EP (1) | EP1857761B1 (en) |
DE (1) | DE102006023809B3 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2072763B1 (en) * | 2007-12-21 | 2015-04-08 | Techspace Aero S.A. | Heat exchange system in a turbomachine |
DE102008056810B4 (en) * | 2008-11-11 | 2011-11-24 | Pierburg Gmbh | Cooling device for an internal combustion engine |
DE102009005879A1 (en) * | 2009-01-23 | 2010-08-05 | Semikron Elektronik Gmbh & Co. Kg | Cooling device with a rib heat sink |
GB2471514B (en) * | 2009-07-03 | 2013-08-14 | Ford Global Tech Llc | Heat exchanging systems for motor vehicles |
GB2477316A (en) * | 2010-01-29 | 2011-08-03 | Tanjung Citech Uk Ltd | Seal for a heat exchanger bypass valve |
FR2982646B1 (en) * | 2011-11-15 | 2015-05-29 | Faurecia Sys Echappement | HEAT EXCHANGER SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE |
KR101321064B1 (en) * | 2011-12-13 | 2013-10-22 | 주식회사 코렌스 | Automotive combination heat exchanger |
KR101583889B1 (en) | 2013-12-20 | 2016-01-21 | 현대자동차주식회사 | Oil temperature control apparatus and control method thereof |
KR101551023B1 (en) * | 2013-12-20 | 2015-09-18 | 현대자동차주식회사 | Oil temperature control apparatus and control method thereof |
DE102014203896A1 (en) * | 2014-03-04 | 2015-09-10 | Mahle International Gmbh | Motor vehicle with an internal combustion engine |
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US4319630A (en) * | 1978-12-07 | 1982-03-16 | United Aircraft Products, Inc. | Tubular heat exchanger |
DE3302304A1 (en) * | 1983-01-25 | 1984-07-26 | Borsig Gmbh, 1000 Berlin | HEAT EXCHANGER FOR COOLING HOT GASES, ESPECIALLY FROM THE AMMONIA SYNTHESIS |
EP0197823A1 (en) * | 1985-03-20 | 1986-10-15 | Valeo | Heat exchanger for a motor vehicle, particularly of the type for exhaust gases |
DE19722256C1 (en) * | 1997-05-28 | 1998-10-01 | Daimler Benz Ag | Heat exchanger for a water-cooled internal combustion engine |
JPH11311114A (en) * | 1998-04-28 | 1999-11-09 | Aisin Seiki Co Ltd | Lubricating device for engine balancer |
JP3852255B2 (en) | 1999-11-10 | 2006-11-29 | いすゞ自動車株式会社 | EGR and oil cooling device |
DE10041579A1 (en) * | 2000-08-24 | 2002-03-07 | Siemens Automotive Corp Lp | Valve arrangement with double flap and thermal bridge for an exhaust gas recirculation system and method for its operation |
ATE484670T1 (en) | 2001-07-11 | 2010-10-15 | Cooper Standard Automotive D | EXHAUST GAS RECIRCULATION SYSTEM |
DE10203003B4 (en) * | 2002-01-26 | 2007-03-15 | Behr Gmbh & Co. Kg | Exhaust gas heat exchanger |
FR2846735B1 (en) | 2002-10-30 | 2006-01-06 | Valeo Thermique Moteur Sa | HEAT EXCHANGER HAVING SEVERAL FLUIDS, IN PARTICULAR FOR A MOTOR VEHICLE, AND ASSOCIATED THERMAL ENERGY MANAGEMENT SYSTEM. |
FR2847004B1 (en) | 2002-11-12 | 2005-07-29 | Peugeot Citroen Automobiles Sa | DEVICE FOR THERMALLY REGULATING THE INTAKE AIR OF A RECIRCULATED ENGINE AND EXHAUST GAS EMITTED BY THIS ENGINE |
EP1536198A1 (en) * | 2003-11-25 | 2005-06-01 | Terra Energia S.r.l. | Heat exchanger |
FR2864582B1 (en) * | 2003-12-24 | 2006-03-17 | Valeo Thermique Moteur Sa | HEAT EXCHANGE MODULE FOR CONTROLLING THE TEMPERATURE OF GASES ADMITTED IN A MOTOR VEHICLE THERMAL MOTOR |
FR2869649B1 (en) * | 2004-04-30 | 2006-07-28 | Valeo Thermique Moteur Sas | IMPROVED SYSTEM FOR CONTROLLING THE TEMPERATURE OF GASES ADMITTED IN AN ENGINE |
ES2322728B1 (en) * | 2005-11-22 | 2010-04-23 | Dayco Ensa, S.L. | THREE-STEP HEAT EXCHANGER FOR AN "EGR" SYSTEM. |
-
2006
- 2006-05-20 DE DE102006023809A patent/DE102006023809B3/en active Active
-
2007
- 2007-05-03 EP EP07107408.2A patent/EP1857761B1/en not_active Not-in-force
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Publication number | Publication date |
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EP1857761A2 (en) | 2007-11-21 |
EP1857761A3 (en) | 2011-12-28 |
DE102006023809B3 (en) | 2007-09-13 |
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