AT2490U1 - COOLER ARRANGEMENT FOR A CHARGED INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS RECIRCULATION - Google Patents
COOLER ARRANGEMENT FOR A CHARGED INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS RECIRCULATION Download PDFInfo
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- AT2490U1 AT2490U1 AT0074897U AT74897U AT2490U1 AT 2490 U1 AT2490 U1 AT 2490U1 AT 0074897 U AT0074897 U AT 0074897U AT 74897 U AT74897 U AT 74897U AT 2490 U1 AT2490 U1 AT 2490U1
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- cooler
- exhaust gas
- charge air
- gas recirculation
- arrangement according
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Classifications
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
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- 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
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- 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
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
- F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
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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
-
- 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
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
-
- 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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Supercharger (AREA)
Abstract
Eine Kühleranordnung für eine aufgeladene Brennkraftmaschine mit Abgasrückführung besteht aus einem Ladeluftkühler (2) und einem Abgasrückführkühler (3), welche als kühlmitteldurchströmte Wärmetauscher ausgebildet sind. Der Ladeluftkühler (2) und der Abgasrückführkühler (3) sind in einem gemeinsamen Gehäuse (1) angeordnet, wobei im Strömungsweg der Ladeluft unmittelbar nach dem Ladeluftkühler (3) mindestens eine Düse (6) vorgesehen ist, deren Düsenaustrittsteil (61) sich vorzugsweise in Strömungsrichtung erweitert. Die stromabwärtige Seite des Abgasrückführkühlers (3) steht unmittelbar mit dieser Düse (6) in Verbindung. Dadurch wird ein kompakter Aufbau sowie eine einfache Herstellung der Kühleranordnung erreicht.A cooler arrangement for a supercharged internal combustion engine with exhaust gas recirculation consists of a charge air cooler (2) and an exhaust gas recirculation cooler (3), which are designed as heat exchangers through which coolant flows. The charge air cooler (2) and the exhaust gas recirculation cooler (3) are arranged in a common housing (1), at least one nozzle (6) being provided in the flow path of the charge air immediately after the charge air cooler (3), the nozzle outlet part (61) of which is preferably in Flow direction expanded. The downstream side of the exhaust gas recirculation cooler (3) is directly connected to this nozzle (6). This achieves a compact structure and simple manufacture of the cooler arrangement.
Description
AT 002 490 UlAT 002 490 Ul
Die vorliegende Erfindung betrifft eine Kühleranordnung für eine aufgeladene Brennkraft-maschine mit Abgasrückführung, bestehend aus einem Ladeluftkühler und einem Abgasrückführkühler, welche als kühlmitteldurchströmte Wärmetauscher ausgebildet sind.The present invention relates to a cooler arrangement for a supercharged internal combustion engine with exhaust gas recirculation, consisting of a charge air cooler and an exhaust gas recirculation cooler, which are designed as heat exchangers through which coolant flows.
Die Einhaltung strenger Abgasgrenzwerte läßt sich bei modernen Hochleistungsmotoren im allgemeinen nur darstellen, wenn eine Abgasrückführung in relativ großem Ausmaß durchgeführt wird. Dabei ist es erforderlich, sowohl das rückgeführte Abgas als auch die Ladeluft zu kühlen. Bisherige Systeme dieser Art sind sehr aufwendig was den benötigten Raum betrifft, und durch ihren komplizierten Aufbau teuer in der Herstellung und Wartung.In modern high-performance engines, compliance with strict exhaust gas limit values can generally only be demonstrated if exhaust gas recirculation is carried out to a relatively large extent. It is necessary to cool both the recirculated exhaust gas and the charge air. Previous systems of this type are very complex in terms of the space required and, due to their complicated structure, expensive to manufacture and maintain.
Aufgabe der vorliegenden Erfindung ist es, die genannten Nachteile zu vermeiden und eine Kühleranordnung zu schaffen, die äußerst kompakt und dennoch einfach in ihrem Aufbau und der Herstellung ist.The object of the present invention is to avoid the disadvantages mentioned and to provide a cooler arrangement which is extremely compact and yet simple in its construction and manufacture.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der Ladeluftkühler und der Abgas-rückführkühler in einem gemeinsamen Gehäuse angeordnet sind, daß im Strömungsweg der Ladeluft unmittelbar nach dem Ladeluftkühler mindestens eine Düse vorgesehen ist, deren Düsenaustrittsteil sich vorzugsweise in Strömgungsrichtung erweitert, und daß die stromab-wärtige Seite des Abgasrückführkühlers unmittelbar mit dieser Düse in Verbindung steht.According to the invention, this object is achieved in that the charge air cooler and the exhaust gas recirculation cooler are arranged in a common housing, that at least one nozzle is provided in the flow path of the charge air immediately after the charge air cooler, the nozzle outlet part of which preferably widens in the direction of flow, and that the downstream The hard side of the exhaust gas recirculation cooler is directly connected to this nozzle.
Durch den erfindungsgemäßen Aufbau wird nicht nur eine äußerst kompakte Anordnung der Bauteile erzielt, es können auch die luftseitigen Strömungswiderstände verringert werden. Es ist insbesondere günstig, wenn der Strömungsweg der Ladeluft durch den Ladeluftkühler und der Strömungsweg des rückgeführten Abgases durch den Abgasrückführkühler im wesentlichen parallel zueinander sind, wobei die Durchströmung in gleicher Richtung erfolgt.The construction according to the invention not only achieves an extremely compact arrangement of the components, the air-side flow resistances can also be reduced. It is particularly advantageous if the flow path of the charge air through the charge air cooler and the flow path of the recirculated exhaust gas through the exhaust gas recirculation cooler are essentially parallel to one another, the throughflow taking place in the same direction.
Vorzugsweise ist vorgesehen, daß unmittelbar stromaufwärts des Abgasrückführkühlers mindestens ein Abgasrückführventil angeordnet ist.It is preferably provided that at least one exhaust gas recirculation valve is arranged immediately upstream of the exhaust gas recirculation cooler.
Eine sehr kompakte Anordnung läßt sich erreichen, wenn der Abgasrückführkühler sich unmittelbar oberhalb des Ladeluftkühlers befindet und wenn oberhalb des Ladeluftkühlers ein Lufteinlaßverteiler angeordnet ist.A very compact arrangement can be achieved if the exhaust gas recirculation cooler is located directly above the charge air cooler and if an air inlet distributor is arranged above the charge air cooler.
Der Ladeluftkühler und/oder der Abgasrückführkühler können als Lamellen-, Platten- oder Rohrwärmetauscher ausgeführt sein. Zur Erzielung von hohen Kühlleistungen bei minimalem Raumbedarf ist es aber vorteilhaft, wenn der Ladeluftkühler als Lamellenwärmetauscher und der Abgasrückführkühler als Rohrwärmetauscher oder Plattenwärmetauscher ausgebildet ist.The charge air cooler and / or the exhaust gas recirculation cooler can be designed as a finned, plate or tubular heat exchanger. In order to achieve high cooling capacities with a minimal space requirement, it is advantageous if the charge air cooler is designed as a finned heat exchanger and the exhaust gas recirculation cooler as a tubular heat exchanger or plate heat exchanger.
Die Wärmeübertragung kann insbesondere optimiert werden, wenn das Kühlmittel zunächst quer zur Strömungsrichtung der Ladeluft durch den Ladeluftkühler geführt wird und daran anschließend parallel dazu in Gegenrichtung durch den Abgasrückführkühler geführt wird.The heat transfer can be optimized in particular if the coolant is first passed through the charge air cooler transversely to the flow direction of the charge air and is then subsequently passed in parallel in the opposite direction through the exhaust gas recirculation cooler.
Besonders hohe Abgasrückführraten um 50 % und mehr sind darstellbar, wenn die Düse, in der das Abgas in die Ladeluft rückgeführt wird, als Laval-Düse ausgebildet ist. Zur Verbesse- 2 AT 002 490 Ul rung der Abgasrückführung kann weiters vorgesehen sein, daß vor der Düse zumindest eine Drosselklappe fiir die Ladeluft angeordnet ist.Particularly high exhaust gas recirculation rates of 50% and more can be achieved if the nozzle in which the exhaust gas is returned to the charge air is designed as a Laval nozzle. To improve the exhaust gas recirculation, it can further be provided that at least one throttle valve for the charge air is arranged in front of the nozzle.
Zur Vermeidung von Strömungsablösunugen ist es vorteilhaft, wenn der Düsenaustrittsteil einen Diffusor aufweist, wobei der Öffnungswinkel des Diffusors kleiner als 10°, vorzugsweise kleiner als 5°, ist und besonders vorzugsweise höchstens 3° beträgt.To avoid flow separation, it is advantageous if the nozzle outlet part has a diffuser, the opening angle of the diffuser being less than 10 °, preferably less than 5 °, and particularly preferably being at most 3 °.
Sehr platzsparend ist dabei eine erfindungsgemäße Ausführung, bei der die Achse des Diffusors etwa in Längsrichtung des Gehäuses innerhalb des Luftverteilers angeordnet ist. Der Diffusoraustrittsdurchmesser beträgt dabei etwa das 1.5 bis 3-fache, vorzugsweise das 2 bis 2.5-fache des Diffusoreintrittsdurchmessers.An embodiment according to the invention in which the axis of the diffuser is arranged approximately in the longitudinal direction of the housing within the air distributor is very space-saving. The diffuser outlet diameter is approximately 1.5 to 3 times, preferably 2 to 2.5 times the diffuser inlet diameter.
In der Folge wird die Erfindung anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail below on the basis of the exemplary embodiment illustrated in the figures.
Die Figuren zeigen: Fig. 1 eine axonometrische Explosionsdarstellung der wesentlichen Bauteile einer erfindungsgemäßen Kühleranordnung in einer ersten Ausführungsvariante, Fig. 2 diese Kühleranordnung im zusammengebauten Zustand, Fig. 3 eine axonometrische Explosionsdarstellung der wesentlichen Bauteile einer erfmdungsgemäßen Kühleranordnung in einer zweiten Ausführungsvariante, Fig. 4 einen Längsschnitt durch diese Kühleranordnung gemäß der Linie IV-IV in Fig. 5 und 6, Fig. 5 und 6 Querschnitte durch diese Kühleranordnung gemäß den Linien V-V bzw. VI-VI in Fig. 4.1 shows an axonometric exploded view of the essential components of a cooler arrangement according to the invention in a first embodiment variant, FIG. 2 shows this cooler arrangement in the assembled state, FIG. 3 shows an axonometric exploded view of the essential components of a cooler arrangement according to the invention in a second embodiment variant, FIG. 4 5 and 6, FIGS. 5 and 6 cross sections through this cooler arrangement according to the lines VV and VI-VI in Fig. 4th
Funktionsgleiche Teile sind in den Ausführungsbeispielen mit gleichen Bezugszeichen versehen.Functionally identical parts are provided with the same reference symbols in the exemplary embodiments.
Aus Fig.l ist ersichtlich, daß die Kühleranordnung aus einem Gehäuse 1, einem Ladeluftkühler 2, einem Abgasrückführkühler 3 und einer Abdeckung 4 besteht. An dem Gehäuse 1 ist ein Anschluß 10 für die Ladeluft angebracht, der mit einem nicht weiter dargestellten Turbolader in Verbindung steht. Über einen Krümmer 11 wird die Ladeluft in den Innenraum 12 des Gehäuses 1 eingeführt. In dem Gehäuse 1 ist der Ladeluftkühler 2 frei hängend angeordnet. Die Ladeluft durchströmt den Ladeluftkühler 2 in der Richtung des Pfeils 21. Nach dem Durchströmen des Ladeluftkühlers 2 tritt die Ladeluft in den Düseneintrittsteil 60 einer vorteilhafterweise als Laval-Düse ausgebildeten Düse 6 ein.From Fig.l it can be seen that the cooler assembly consists of a housing 1, a charge air cooler 2, an exhaust gas recirculation cooler 3 and a cover 4. On the housing 1, a connection 10 for the charge air is attached, which is connected to a turbocharger, not shown. The charge air is introduced into the interior 12 of the housing 1 via a manifold 11. The charge air cooler 2 is freely suspended in the housing 1. The charge air flows through the charge air cooler 2 in the direction of arrow 21. After flowing through the charge air cooler 2, the charge air enters the nozzle inlet part 60 of a nozzle 6 which is advantageously designed as a Laval nozzle.
In seitlich am Ladeluftkühler 2 angeordneten Flanschen 24 sind einerseits die Kühlwasserein-strömöffnung 22 und andererseits die Kühlwasserausströmöffiiung 23 angeordnet. Das Kühlwasser durchströmt daher die Lamellen 20 des Ladeluftkühlers 2 im wesentlichen in der Richtung des Pfeils 25. Unmittelbar oberhalb des Ladeluftkühlers 2 ist der Abgasrückführkühler 3 angeordnet. Der Abgasrückführkühler 3 ist auf einem Flansch 30 befestigt und besitzt eine Vielzahl von zueinander parallelen Röhren 31 oder Platten, wenn der Abgasrückführkühler 3 als Plattenwärmetauscher ausgeführt ist, die vom Abgas in der Richtung des Pfeils 35 durchströmt werden. Das Kühlwasser, das aus der Öffnung 23 im Ladeluftkühler 2 ausströmt, tritt über eine in der Fig. 1 nicht sichtbare Öffnung in den Abgasrückführkühler 3 ein und durchströmt ihn im wesentlichen in der Richtung des Pfeiles 34, indem es die Röhren 31 oder die Platten umspült. Die Butzen 32 am Abgasrückführkühler 3 dienen zur Aufnahme von nicht dargestellten Schrauben, die den Abgasrückführkühler 3 über die Flansche 24 und 3 AT 002 490 Ul 15 mit dem Ladeluftkühler 2 und dem Gehäuse 1 verbinden. Der Abgasrückführkühler 3 ist von einer Abdeckung 4 umschlossen. An einer Stirnseite 42 der Abdeckung 4 sind nicht dargestellte Flansche für die Befestigung von Abgasrückführventilen 7 zur Steuerung der Menge des rückgeführten Abgases vorgesehen. Die rückgeführten Abgase münden dabei stromabwärts des Abgasrückführkühlers 3 in als Laval-Düsen ausgebildete Düsen 6 des Ladeluftströmungsweges stromabwärts des Ladeluftkühlers 2 ein.In the flanges 24 arranged laterally on the charge air cooler 2, on the one hand the cooling water inflow opening 22 and on the other hand the cooling water outflow opening 23 are arranged. The cooling water therefore flows through the fins 20 of the charge air cooler 2 essentially in the direction of arrow 25. Immediately above the charge air cooler 2, the exhaust gas recirculation cooler 3 is arranged. The exhaust gas recirculation cooler 3 is fastened to a flange 30 and has a multiplicity of tubes 31 or plates which are parallel to one another if the exhaust gas recirculation cooler 3 is designed as a plate heat exchanger through which the exhaust gas flows in the direction of the arrow 35. The cooling water which flows out of the opening 23 in the charge air cooler 2 enters the exhaust gas recirculation cooler 3 via an opening which is not visible in FIG. 1 and flows through it essentially in the direction of the arrow 34 by washing around the tubes 31 or the plates . The slugs 32 on the exhaust gas recirculation cooler 3 serve to hold screws, not shown, which connect the exhaust gas recirculation cooler 3 to the charge air cooler 2 and the housing 1 via the flanges 24 and 3 AT 002 490 Ul 15. The exhaust gas recirculation cooler 3 is enclosed by a cover 4. On an end face 42 of the cover 4, flanges (not shown) are provided for the attachment of exhaust gas recirculation valves 7 for controlling the amount of the recirculated exhaust gas. The recirculated exhaust gases open out downstream of the exhaust gas recirculation cooler 3 into nozzles 6 of the charge air flow path, which are designed as Laval nozzles, downstream of the charge air cooler 2.
Zwischen dem Düsenaustrittsteil 61 und dem Düseneintrittsteil 60 bzw. dem an den Düseneintrittsteil 60 anschließenden Flansch 30 ist ein Spalt 62 ausgebildet, über welchen das Abgas in die Düse 6 einströmt. Durch den in der Düse 6 erzeugten Unterdrück wird das rückgeführte Abgas über den Spalt 62 in den Ladeluftstrom eingezogen. Der Spalt 62 ist den Fig. 4 und 5 zu entnehmen, welche eine zweite Ausführungsvariante der Erfindung im Schnitt im zusammengebauten Zustand zeigen. Bei der ersten Ausführungsvariante ist der Spalt analog ausgebildet.A gap 62 is formed between the nozzle outlet part 61 and the nozzle inlet part 60 or the flange 30 adjoining the nozzle inlet part 60, via which the exhaust gas flows into the nozzle 6. Due to the negative pressure generated in the nozzle 6, the recirculated exhaust gas is drawn into the charge air flow via the gap 62. The gap 62 can be seen in FIGS. 4 and 5, which show a second embodiment variant of the invention in section in the assembled state. In the first embodiment variant, the gap is designed analogously.
Oberhalb der Deckfläche 41 der Abdeckung 4 kann ein in Fig. 1 und 2 nicht weiter dargestellter Luftverteiler 5 zur Zufuhr der nunmehr mit dem rückgeführten Abgas angereicherten Ladeluft angeordnet sein.An air distributor 5, not shown in FIGS. 1 and 2, for supplying the charge air now enriched with the recirculated exhaust gas can be arranged above the cover surface 41 of the cover 4.
Der Düsenaustrittsteil 61 ist in dem in Fig. 1 und 2 gezeigten Beispiel als langgestreckter Diffusor 61a ausgeführt, dessen Achse 61b in Längsrichtung des Gehäüses 1 angeordnet ist. Stromaufwärts des Diffusors 61a ist zur Strömungsumlenkung ein Umlenkstück 61c vorgesehen. Der auf die Achse 61b bezogene Öffnungswinkel α des Diffusors 61a beträgt dabei etwa 3°, um eine Strömungsablösung zu vermeiden. Der Diffusoraustrittsdurchmesser D2 sollte dabei das 2 bis 2.5 - fache des Diffusoreintrittsdurchmessers Dl betragen. Der sich verjüngende Düseneintrittsteil 60 kann dabei am Flansch 30 des Abgasrückführkühlers 3 vorgesehen sein.In the example shown in FIGS. 1 and 2, the nozzle outlet part 61 is designed as an elongated diffuser 61a, the axis 61b of which is arranged in the longitudinal direction of the housing 1. A deflection piece 61c is provided upstream of the diffuser 61a for flow deflection. The opening angle α of the diffuser 61a, which is related to the axis 61b, is approximately 3 ° in order to avoid flow separation. The diffuser outlet diameter D2 should be 2 to 2.5 times the diffuser inlet diameter D1. The tapering nozzle inlet part 60 can be provided on the flange 30 of the exhaust gas recirculation cooler 3.
Der Unterdrück kann gegebenenfalls noch durch zusätzliche Drosselmaßnahmen, beispielsweise einer Drosselklappe 16 im Bereich des Düseneintrittsteiles 60, verstärkt werden. Die Fig. 3 bis 6 zeigen ein Ausführungsbeispiel einer erfindungsgemäßen Kühleranordnung mit einer solchen Drosselklappe 16 im Düseneintrittsteil 60, welcher durch ein Drosselklappengehäuse 13 gebildet ist. Der Einsatz der Drosselklappe 16 gestattet es die Länge der Düse 6 sehr kurz auszuführen.The suppression can optionally be increased by additional throttling measures, for example a throttle valve 16 in the region of the nozzle inlet part 60. 3 to 6 show an embodiment of a cooler arrangement according to the invention with such a throttle valve 16 in the nozzle inlet part 60, which is formed by a throttle valve housing 13. The use of the throttle valve 16 allows the length of the nozzle 6 to be very short.
In den Fig. 4 bis 6 ist dabei die Kühleranordnung im zusammengebauten Zustand dargestellt. Im Vergleich zu den Fig.l und 2 ist in den Fig. 3 bis 6 zusätzlich ein Luftverteiler 5 mit dem Einlaßröhrenwerk 50 gezeigt. Weiters ist ein Abgasrückführventil 7 zur Steuerung der rückgeführten Abgasmenge sichtbar.4 to 6, the cooler arrangement is shown in the assembled state. In comparison to FIGS. 1 and 2, an air distributor 5 with the inlet tube assembly 50 is additionally shown in FIGS. 3 to 6. An exhaust gas recirculation valve 7 for controlling the recirculated exhaust gas quantity is also visible.
Die vorliegende Erfindung ermöglicht sowohl eine sehr kurze als auch strömungsgünstige Führung der Ladeluft als auch des rückgeführten Abgases und des Kühlwassers. Das Kühlwasser durchströmt zunächst den Ladeluftkühler 2, dann den Abgasrückführkühler 3 und fließt über eine nicht weiter dargestellte elektrische Wasserpumpe zurück zum Kühler. Aufgrund der Tatsache, daß die Vorrichtung äußerst kompakt ist, ist es möglich, einen Einbau zwischen den Zylinderreihen eines V-Motors vorzunehmen. 4The present invention enables the charge air and the recirculated exhaust gas and the cooling water to be guided both in a very short and in terms of flow. The cooling water first flows through the charge air cooler 2, then the exhaust gas recirculation cooler 3 and flows back to the cooler via an electric water pump (not shown). Due to the fact that the device is extremely compact, it is possible to install between the rows of cylinders of a V-engine. 4th
Claims (13)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0074897U AT2490U1 (en) | 1997-11-28 | 1997-11-28 | COOLER ARRANGEMENT FOR A CHARGED INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS RECIRCULATION |
DE19853455A DE19853455B4 (en) | 1997-11-28 | 1998-11-19 | Radiator arrangement for a supercharged internal combustion engine with exhaust gas recirculation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0074897U AT2490U1 (en) | 1997-11-28 | 1997-11-28 | COOLER ARRANGEMENT FOR A CHARGED INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS RECIRCULATION |
Publications (1)
Publication Number | Publication Date |
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AT2490U1 true AT2490U1 (en) | 1998-11-25 |
Family
ID=3498773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT0074897U AT2490U1 (en) | 1997-11-28 | 1997-11-28 | COOLER ARRANGEMENT FOR A CHARGED INTERNAL COMBUSTION ENGINE WITH EXHAUST GAS RECIRCULATION |
Country Status (2)
Country | Link |
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AT (1) | AT2490U1 (en) |
DE (1) | DE19853455B4 (en) |
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Also Published As
Publication number | Publication date |
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DE19853455B4 (en) | 2006-11-30 |
DE19853455A1 (en) | 1999-06-02 |
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