EP0428919B1 - Oil-cooler for a combustion motor - Google Patents
Oil-cooler for a combustion motor Download PDFInfo
- Publication number
- EP0428919B1 EP0428919B1 EP90120966A EP90120966A EP0428919B1 EP 0428919 B1 EP0428919 B1 EP 0428919B1 EP 90120966 A EP90120966 A EP 90120966A EP 90120966 A EP90120966 A EP 90120966A EP 0428919 B1 EP0428919 B1 EP 0428919B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- plate
- oil cooler
- oil
- cooler according
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims 2
- 239000003921 oil Substances 0.000 description 31
- 238000005476 soldering Methods 0.000 description 11
- 239000000498 cooling water Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
- F28F3/10—Arrangements for sealing the margins
-
- 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
- F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/916—Oil cooler
Definitions
- the invention relates to an oil cooler for an internal combustion engine, consisting of a plurality of disk bodies arranged in a stack in a housing through which coolant flows, the lower part of which is formed by one of two matching plates and the cover of which is formed by the second plate, the edges of the profiled plates being kept apart are soldered and enclose a cavity through which the oil to be cooled flows and which is connected to the cavities of adjacent disk bodies via flow openings.
- Disc oil coolers are known (DE-AS 28 43 423).
- the plates forming the outer walls of the oil-flowing chambers are pushed onto a central tube and lie down with collars arranged in the area of the pipe and projecting outwards and with collars arranged in the area of their outer circumference, facing inwards. pronounced edges loosely to each other.
- Turbulence inserts are inserted between each plate forming an oil chamber.
- the boards stacked in this way are then soldered. It must be ensured that the the respective inner and outer edges of the plates are sufficiently firmly in contact with the assigned parts of adjacent plates, because otherwise no reliable soldering can be achieved. This is relatively expensive.
- An oil cooler of the type mentioned at the outset is also known (WO 88/04761).
- Flat tube bodies for oil coolers are provided there, which are each constructed from two elongated plate halves. These plate halves are provided with all-round edges that overlap and are soldered. It is difficult here to hold the parallel longitudinal edges of the plate halves so tightly together in all areas for the soldering process that the desired soldering gap is reached at every point.
- the present invention has for its object to simplify a disc oil cooler of the type mentioned in terms of manufacturing technology.
- the characterizing features of claim 1 are in an oil cooler of the type mentioned intended.
- This measure allows the individual disk bodies to be joined together in a relatively simple manner, prior to the soldering process, in the manner of a can, and can also hold the turbulence inserts assigned to them without the aid of assembly devices. If the disc bodies formed in this way are then pushed onto the tube, since the two plates belonging together are already centered against one another, there is also no fear of canting.
- the advantage is also achieved that the latching edges, which are held in one another under pretension, form the desired narrow soldering gap all around the circumference and thus ensure tight soldering.
- soldering material for example in the form of soldering foils
- the plates can of course be solder-plated in a simple manner, so that the insertion of solder foils is eliminated.
- the advantage is achieved that the two plates forming the cavity do not have to be kept at a mutual distance by separate measures. They are arranged at the correct distance from one another after pretensioning their outer edges.
- Claim 2 gives the guarantee that the required bracing is maintained uniformly over the entire circumference and not, as in the prior art, is impossible due to straight edges.
- the features of claim 3 offer the advantage that the disc body can be put on and put together in a simple manner.
- the distance to adjacent disk bodies can be ensured by the measures of claim 4.
- the measures of claim 5 ensure the simple positioning of the disc body on the central mounting tube, while at the same time also the mutual inside diameter Distance of the plates is maintained.
- the features of claim 6 ensure the flow through the cavities, the type of flow depending on the selected housing shape.
- a can-shaped housing (1) of a disc oil cooler can be seen, which is cup-shaped and is closed at the bottom by an attached bottom (2) which overlaps the free edge of the cup-shaped housing (1) on the outside.
- the housing (1) is provided with an inlet connection (3) for the cooling liquid, which is usually the cooling water of the Is the engine on which the oil cooler for cooling the engine oil is attached.
- the housing (1) also has an outlet connection (4) for the cooling water.
- Inlet and outlet connections (3, 4) are closed off from one another by a partition on the water side, which - as will be explained later (FIGS. 10, 11) - is formed by an expression (30) on the disk bodies. As shown in Fig.
- an inflow opening (5) for the oil to be cooled is provided on the top of the pot-like housing (1), which is then supplied to the housing (1) in a manner not shown in the direction of arrow (6) flows through the disc body to be explained and leaves the housing (1) through an outlet opening (7) at the bottom (2) in the direction of the arrow (8).
- the oil therefore enters and exits transversely to the flow of the cooling water indicated by the arrows (9) in FIG. 1.
- Fig. 4 shows that the disc oil cooler in the interior of the housing (1) is constructed from a plurality of disc bodies (10) which are stacked one above the other in the interior of the pot-like housing (1) and each with a central opening (11) (see Fig 5, 6, 10 and 11) are pushed onto a tube (12) running centrally in the housing (1), the longitudinal axis of which extends parallel to the outer walls of the pot-like housing (1).
- each disk body (10) consists of two plates (13 and 14) which are assigned to one another, of which the plate (14) shown in FIGS. 5 and 6 is the cover and that in FIGS.
- the plate (13) shown forms the lower part of a disk body (10), which is designed in the manner of a can and also accommodates a turbulence insert (15) in its cavity, which improves the heat transfer between the oil flowing through each of the disk bodies (10) and to increase the cooling water flowing around the disc body (10).
- the plates (13 and 14) are both circular.
- FIGS. 1 to 4 The embodiment of FIGS. 1 to 4 is provided for the use of the oil cooler with an oil filter, which connects to the side of the oil cooler of FIG. 4 facing the outlet opening (7) in a manner not shown.
- the oil cleaned by the oil filter is then returned to the engine through the opening in the sleeve (12).
- the space adjacent to the outlet opening (7) can therefore be sealed off within the circumferential housing bulge and, as shown in dashed lines in FIG. 1 and 4 is indicated, in the sleeve (12) a slot (31) running longitudinally on one side is provided, through which in this case the oil from the individual disk bodies, with the outlet opening (7) closed, directly into the sleeve (12) and from there can flow back again.
- the plate forming the cover (14) has an outer circumferential edge (16) directed towards the lower part (13), the free end of which slightly follows is bent on the outside and thus forms an internal chamfer (17) which facilitates the sliding of the edge (16) over the edge (18) of the plate (13) forming the lower part (FIG. 12).
- the free end of the edge (18) of the plate (13) is directed somewhat inwards, so that there is an external chamfer (19).
- the edge (16) of the plate (14) has its largest inside dimension approximately in the middle.
- a circumferential recess (20) is provided here, which has an obtuse-angled cross section with an apex directed outwards.
- the edge (18) is designed such that it has a shape on the outside which corresponds approximately to the obtuse-angled cross-section of the edge (16), the apex of the obtuse angle also being directed outwards, so that a circumferential edge (21) arises when you press into each other of the lid and lower part of a disc body (10), that is, when the plates (14 and 13) are pressed together into the recess (20) of the outer edge (16).
- the dimensions are chosen so that the edges (16 and 18) lie against each other under tension on the entire circumference. Such a prestress could also be achieved if the plates are designed elliptical or egg-shaped. It could not be achieved with an oval shape, because no defined elastic contact force is possible on the parallel longitudinal sides.
- the plate (13) also has an indentation (30) which extends radially outward from the shape (23) of the left opening (FIG. 11) and which, as indicated in FIG. 1, has a partition between the inflow connector (3 ) and the drain port (4) for the cooling liquid, which is forced in this way to flow in the space between two disc bodies (10) the path marked in Fig. 1 with the arrows (9).
- the plate (14) forming the cover of the disc body (10) is designed differently in the area of the inner opening (11). they does not have an edge framing the opening (11), but instead is provided in the region of two kidney-shaped openings (25) also opposite the opening (11) with only one web (26) provided on the inner edge of the respective opening (25), the the opening (25) bounds inwards and extends to just before the edge of the opening (24) of the other plate.
- the webs serve to guide the oil flow and have the effect that the oil must flow through the disks in the sense of the arrows shown in broken lines in FIG. 6 and does not flow from an opening (25) from the inside to the opposite opening.
- each of the approximately circular plates (14) is provided with outwardly directed button-like features (27) which are evenly distributed over the circumference and serve to provide support against adjacent disc bodies.
- the features (27) of the plate (14) are based on corresponding features (28) of the plate (13) (see FIGS. 10, 11 and 13), the height of which also corresponds to half the distance between adjacent disk bodies.
- the forms (23) provide support for adjacent pane bodies in the inner region of the pane bodies (10), this is achieved by the forms (27 and 28) in the outer region of the pane bodies.
- the base (2) is put on, which ensures that all the disk bodies are pressed against one another with the necessary axial force.
- the pre-assembled disc oil coolers are then soldered in a soldering oven. The selected design results in a good and tight connection of all parts.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Die Erfindung betrifft einen Ölkühler für eine Brennkraftmaschine , bestehend aus mehreren stapelartig in einem von Kühlflüssigkeit durchströmten Gehäuse angeordneten Scheibenkörpern, deren Unterteil von einer von zwei zusammenpassenden Platten und deren Deckel von der zweiten Platte gebildet ist, wobei die Ränder der auf Abstand gehaltenen, profilierten Platten verlötet sind und einen vom zu kühlenden Öl durchströmten und mit den Hohlräumen benachbarter Scheibenkörper über Durchflußöffnungen in Verbindung stehenden Hohlraum einschließen.The invention relates to an oil cooler for an internal combustion engine, consisting of a plurality of disk bodies arranged in a stack in a housing through which coolant flows, the lower part of which is formed by one of two matching plates and the cover of which is formed by the second plate, the edges of the profiled plates being kept apart are soldered and enclose a cavity through which the oil to be cooled flows and which is connected to the cavities of adjacent disk bodies via flow openings.
Scheibenölkühler sind bekannt (DE-AS 28 43 423). Bei der Herstellung der bekannten Scheibenölkühler werden die die äußeren Wände der vom Öl durchströmten Kammern bildenden Platten auf ein zentrales Rohr aufgeschoben und legen sich mit im bereich des Rohres angeordneten, nach außen ragenden Kragen und mit im bereich ihres äußeren Umfanges angeordneten, nach innen gerichteten, ausgeprägten Rändern lose aneinander an. Zwischen jeweils eine Ölkammer bildenden Platten werden dabei noch Turbulenzeinlagen eingefügt. Die so gestapelten Platten werden anschließend verlötet. Dabei muß darauf geachtet werden, daß die jeweiligen Innen- und Außenränder der Platten ausreichend fest mit den zugeordneten Teilen benachbarter Platten in Berührung stehen, weil sonst keine zuverlässige Lötung erreicht werden kann. Dies ist verhältnismäßig aufwendig.Disc oil coolers are known (DE-AS 28 43 423). In the manufacture of the known disc oil coolers, the plates forming the outer walls of the oil-flowing chambers are pushed onto a central tube and lie down with collars arranged in the area of the pipe and projecting outwards and with collars arranged in the area of their outer circumference, facing inwards. pronounced edges loosely to each other. Turbulence inserts are inserted between each plate forming an oil chamber. The boards stacked in this way are then soldered. It must be ensured that the the respective inner and outer edges of the plates are sufficiently firmly in contact with the assigned parts of adjacent plates, because otherwise no reliable soldering can be achieved. This is relatively expensive.
Es ist auch ein Ölkühler der eingangs genannten Art bekannt (WO 88/04761). Dort sind Flachrohrkörper für Ölkühler vorgesehen, die aus jeweils zwei länglichen Plattenhälften aufgebaut sind. Diese Plattenhälften sind mit umlaufenden Rändern versehen, die sich gegenseitig überlappen und verlötet werden. Hier ist es schwierig, die parallel zueinander verlaufenden Längsränder der Plattenhälften für den Lötvorgang in allen Bereichen so fest aneinanderzuhalten, daß der gewünschte Lötspalt an jeder Stelle erreicht wird.An oil cooler of the type mentioned at the outset is also known (WO 88/04761). Flat tube bodies for oil coolers are provided there, which are each constructed from two elongated plate halves. These plate halves are provided with all-round edges that overlap and are soldered. It is difficult here to hold the parallel longitudinal edges of the plate halves so tightly together in all areas for the soldering process that the desired soldering gap is reached at every point.
Aus der FR-A 2 319 869 ist es bekannt, mehrere Scheibenkörper stapelartig aufeinander zu setzen, wobei das Unterteil der Scheibenkörper von einer ersten Platte und der Deckel von einer zweiten Platte gebildet ist. Die äußeren Ränder dieser Platten sind dabei mit einer Zickzack-Profilierung ausgebildet, die nach dem Aufeinanderstapeln jeweils am korrespondierenden Rand der benachbarten Platte unter Spannung anliegt. Da aber mehrere von solchen Platten jeweils aneinander gesetzt werden und dabei auf das Zusammenfügen von nach unterschiedlichen Seiten abkragenden Rändern geachten werden muß, sind solche aus ineinander passenden Platten aufgebauten Ölkühler verhältnismäßig aufwendig, wenn an allen Stellen jeweils die Garantie für einen einwandfreien Zusammenhalt für eine spätere Verlötung gegeben werden soll.From FR-A 2 319 869 it is known to stack a plurality of pane bodies on top of one another, the lower part of the pane bodies being formed by a first plate and the cover by a second plate. The outer edges of these plates are formed with a zigzag profile, which after stacking is in tension against the corresponding edge of the adjacent plate. However, since several of such plates are placed next to one another and care must be taken to join together edges that protrude on different sides, such oil coolers constructed from mating plates are relatively complex, if at all points the guarantee for a perfect cohesion for a later one Soldering should be given.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Scheibenölkühler der eingangs genannten Art in herstellungstechnischer Hinsicht zu vereinfachen.The present invention has for its object to simplify a disc oil cooler of the type mentioned in terms of manufacturing technology.
Zur Lösung dieser Aufgabe werden bei einem Ölkühler der eingangs genannten Art die kennzeichnenden Merkmale des Anspruch 1 vorgesehen. Durch diese Maßnahme lassen sich die einzelnen Scheibenkörper in relativ einfacher Weise bereits vor dem Lötvorgang in der Art einer Dose fest zusammenfügen und können jeweils auch die ihnen zugeordneten Turbulenzeinlagen ohne Zuhilfenahme von Montageeinrichtungen festhalten. Werden die so gebildeten Scheibenkörper dann auf das Rohr aufgeschoben, so ist, da die beiden zusammengehörenden Platten schon gegeneinander zentriert sind, auch kein Verkanten zu befürchten. Beim anschließenden Lötvorgang wird außerdem der Vorteil erreicht, daß die einrastend und unter Vorspannung ineinander gehaltenen Ränder den gewünschten engen Lötspalt umlaufend am ganzen Umfang bilden und so eine dichte Verlötung gewährleisten. Vorteilhaft ist auch, daß das Lötmaterial beispielsweise in der Form von Lötfolien bei der mechanischen Vormontage mit eingeclipst und festgehalten werden kann, so daß keine weiteren Arbeitsvorgänge mehr zur Herstellung erforderlich sind. In einfacher Weise können natürlich die Platten lotplattiert sein, so daß das Einfügen von Lötfolien entfällt. Dabei wird der Vorteil erreicht, daß die beiden den Hohlraum bildenden Platten nicht durch gesonderte Maßnahmen auf gegenseitigen Abstand gehalten werden müssen. Sie sind nach dem Einrasten ihrer Außenränder unter Vorspannung im richtigen Abstand zueinander angeordnet.To achieve this object, the characterizing features of
Vorteilhafte Weiterbildungen des Gegenstandes der Erfindung sind in den Unteransprüchen gekennzeichnet. Anspruch 2 gibt dabei die Gewähr, daß die erforderliche Verspannung am gesamten Umfang gleichmäßig aufrechterhalten wird und nicht, wie beim Stand der Technik, durch gerade Ränder unmöglich wird. Die Merkmale des Anspruches 3 bieten den Vorteil, daß sich die Scheibenkörper in einfacher Weise aufeinandersetzen und zusammenfügen lassen. Der Abstand zu benachbarten Scheibenkörpern kann durch die Maßnahmen des Anspruches 4 sichergestellt werden. Die Maßnahmen des Anspruches 5 sichern die einfache Positionierung des Scheibenkörpers an dem zentralen Montagerohr, wobei gleichzeitig auch am Innendurchmesser der gegenseitige Abstand der Platten eingehalten wird. Die Merkmale des Anspruches 6 schließlich stellen die Durchströmung der Hohlräume sicher, wobei die Art der Durchströmung von der gewählten Gehäuseform abhängig ist.Advantageous developments of the subject matter of the invention are characterized in the subclaims.
Die Erfindung ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird im folgenden beschrieben. Es zeigen:
- Fig. 1
- die Draufsicht auf einen Scheibenölkühler gemäß der Erfindung,
- Fig. 2
- die Seitenansicht des Scheibenölkühlers der Fig. 1,
- Fig. 3
- die Ansicht des Scheibenölkühlers der Fig. 1 und 2 in Richtung des Pfeiles III der Fig. 2,
- Fig. 4
- eine im Maßstab vergrößerte Darstellung des Schnittes längs der Linie IV-IV durch den Scheibenölkühler der Fig. 1, mit einer auch in Fig. 1 angedeuteten Variante,
- Fig. 5
- die Darstellung eines Schnittes ähnlich Fig. 4 durch eine zur Herstellung eines Scheibenkörpers des Ölkühlers der Fig. 1 bis 4 verwendeten Deckelplatte,
- Fig. 6
- die Draufsicht auf die Deckelplatte der Fig. 5,
- Fig. 7
- eine vergrößerte Detaildarstellung des bereiches VII in Fig. 5,
- Fig. 8
- eine vergrößerte Detaildarstellung des Schnittes längs der Linie VIII-VIII in Fig. 5,
- Fig. 9
- die vergrößerte Detaildarstellung der Einzelheit IX in Fig. 5,
- Fig.10
- eine Schnittdarstellung ähnlich Fig. 5, jedoch der zweiten zur bildung eines Scheibenkörpers dienenden und als Unterteil vorgesehenen Platte,
- Fig.11
- die Draufsicht auf die Platte der Fig. 10,
- Fig.12
- eine vergrößerte Detaildarstellung des bereiches XII in Fig. 10,
- Fig.13
- die vergrößerte Teildarstellung des Schnittes XIII-XIII in Fig. 10 und
- Fig.14
- die vergrößerte Teildarstellung des Schnittes XIV in der Fig. 10.
- Fig. 1
- the top view of a disc oil cooler according to the invention,
- Fig. 2
- the side view of the disc oil cooler of Fig. 1,
- Fig. 3
- 1 and 2 in the direction of arrow III of FIG. 2,
- Fig. 4
- 2 shows an enlarged representation of the section along the line IV-IV through the window oil cooler of FIG. 1, with a variant also indicated in FIG. 1,
- Fig. 5
- 4 shows a section similar to FIG. 4 through a cover plate used to produce a disk body of the oil cooler of FIGS. 1 to 4,
- Fig. 6
- the top view of the cover plate of FIG. 5,
- Fig. 7
- 5 shows an enlarged detailed representation of area VII in FIG. 5,
- Fig. 8
- an enlarged detail view of the section along the line VIII-VIII in Fig. 5,
- Fig. 9
- the enlarged detail of detail IX in Fig. 5,
- Fig. 10
- 5 shows a sectional illustration similar to FIG. 5, but of the second plate which serves to form a disk body and is provided as a lower part,
- Fig. 11
- the top view of the plate of FIG. 10,
- Fig. 12
- FIG. 10 shows an enlarged detailed representation of the area XII in FIG. 10,
- Fig. 13
- the enlarged partial view of the section XIII-XIII in Fig. 10 and
- Fig. 14
- the enlarged partial view of section XIV in FIG. 10th
In den Fig. 1 bis 3 ist ein dosenförmiges Gehäuse (1) eines Scheibenölkühlers zu erkennen, das topfförmig ausgebildet ist und unten durch einen aufgesetzten Boden (2) abgeschlossen ist, der den freien Rand des topfförmigen Gehäuses (1) außen übergreift. Das Gehäuse (1) ist mit einem Zuflußstutzen (3) für die Kühlflüssigkeit versehen, die in der Regel das Kühlwasser des Motors ist, an dem der Ölkühler zur Kühlung des Motoröles angebaut wird. Das Gehäuse (1) weist auch einen Ablaufstutzen (4) für das Kühlwasser auf. Zu- und Ablaufstutzen (3, 4) sind durch eine wasserseitig verlaufende Trennwand gegeneinander abgeschlossen, die - wie noch erläutert werden wird (Fig. 10, 11) - von einer Ausprägung (30) an den Scheibenkörpern gebildet wird. Wie die Fig. 1 zeigt, ist an der Oberseite des topfartigen Gehäuses (1) eine Zuflußöffnung (5) für das zu kühlende Öl vorgesehen, das in nicht näher dargestellter Weise im Sinne des Pfeiles (6) dem Gehäuse (1) zugeführt wird dann durch die noch zu erläuternden Scheibenkörper strömt und das Gehäuse (1) durch eine Austrittsöffnung (7) am Boden (2) im Sinn des Pfeiles (8) verläßt. Ein- und Austritt des Öles erfolgt daher quer zu der in den Fig. 1 mit den Pfeilen (9) angedeuteten Strömung des Kühlwassers.1 to 3, a can-shaped housing (1) of a disc oil cooler can be seen, which is cup-shaped and is closed at the bottom by an attached bottom (2) which overlaps the free edge of the cup-shaped housing (1) on the outside. The housing (1) is provided with an inlet connection (3) for the cooling liquid, which is usually the cooling water of the Is the engine on which the oil cooler for cooling the engine oil is attached. The housing (1) also has an outlet connection (4) for the cooling water. Inlet and outlet connections (3, 4) are closed off from one another by a partition on the water side, which - as will be explained later (FIGS. 10, 11) - is formed by an expression (30) on the disk bodies. As shown in Fig. 1, an inflow opening (5) for the oil to be cooled is provided on the top of the pot-like housing (1), which is then supplied to the housing (1) in a manner not shown in the direction of arrow (6) flows through the disc body to be explained and leaves the housing (1) through an outlet opening (7) at the bottom (2) in the direction of the arrow (8). The oil therefore enters and exits transversely to the flow of the cooling water indicated by the arrows (9) in FIG. 1.
Die Fig. 4 zeigt, daß der Scheibenölkühler im Inneren des Gehäuses (1) aus mehreren Scheibenkörpern (10) aufgebaut ist, die stapelförmig übereinander im Inneren des topfartigen Gehäuses (1) angeordnet und jeweils mit einer zentralen Öffnung (11) (s. Fig. 5, 6, 10 und 11) auf ein zentral im Gehäuse (1) verlaufendes Rohr (12) aufgeschoben sind, dessen Längsachse parallel zu den Außenwandungen des topfartigen Gehäuses (1) verläuft. Wie noch erläutert werden wird, besteht jeder Scheibenkörper (10) aus jeweils zwei einander zugeordneten Platten (13 und 14), von denen die in den Fig. 5 und 6 dargestellte Platte (14) den Deckel und die in den Fig. 10 und 11 dargestellte Platte (13) den Unterteil eines Scheibenkörpers (10) bildet, der in der Art einer Dose ausgebildet ist und in seinem Hohlraum auch noch eine Turbulenzeinlage (15) aufnimmt, die zur Verbesserung des Wärmeüberganges zwischen dem jeweils die Scheibenkörper (10) durchströmenden Öl und dem die Scheibenkörper (10) außen umflutenden Kühlwasser erhöhen soll. Die Platten (13 und 14) sind beide kreisrund ausgebildet.Fig. 4 shows that the disc oil cooler in the interior of the housing (1) is constructed from a plurality of disc bodies (10) which are stacked one above the other in the interior of the pot-like housing (1) and each with a central opening (11) (see Fig 5, 6, 10 and 11) are pushed onto a tube (12) running centrally in the housing (1), the longitudinal axis of which extends parallel to the outer walls of the pot-like housing (1). As will be explained further, each disk body (10) consists of two plates (13 and 14) which are assigned to one another, of which the plate (14) shown in FIGS. 5 and 6 is the cover and that in FIGS. 10 and 11 The plate (13) shown forms the lower part of a disk body (10), which is designed in the manner of a can and also accommodates a turbulence insert (15) in its cavity, which improves the heat transfer between the oil flowing through each of the disk bodies (10) and to increase the cooling water flowing around the disc body (10). The plates (13 and 14) are both circular.
Die Ausführungsform der Fig. 1 bis 4 ist für den Einsatz des Ölkühlers mit einem Ölfilter vorgesehen, der sich an die der Austrittsöffnung (7) zugewandten Seite des Ölkühlers der Fig. 4 in nicht näher dargestellter Weise anschließt. Das vom Ölfilter gereinigte Öl wird dann durch die Öffnung der Hülse (12) zurück zum Motor geführt.The embodiment of FIGS. 1 to 4 is provided for the use of the oil cooler with an oil filter, which connects to the side of the oil cooler of FIG. 4 facing the outlet opening (7) in a manner not shown. The oil cleaned by the oil filter is then returned to the engine through the opening in the sleeve (12).
Für eine Bauart, bei der kein Ölfilter verwendet wird, wie es beispielsweise bei der Getriebeölkühlung der Fall ist, kann daher der an die Austrittsöffnung (7) angrenzende Raum innerhalb der umlaufenden Gehäuseauswölbung dicht abgeschlossen werden und es wird, wie gestrichelt in den Fig. 1 und 4 angedeutet ist, in der Hülse (12) ein auf einer Seite längs durchlaufender Schlitz (31) vorgesehen, durch den in diesem Fall das Öl aus den einzelnen Scheibenkörpern bei verschlossener Austrittsöffnung (7) unmittelbar in die Hülse (12) und von dort wieder zurückfließen kann.For a design in which no oil filter is used, as is the case for example with transmission oil cooling, the space adjacent to the outlet opening (7) can therefore be sealed off within the circumferential housing bulge and, as shown in dashed lines in FIG. 1 and 4 is indicated, in the sleeve (12) a slot (31) running longitudinally on one side is provided, through which in this case the oil from the individual disk bodies, with the outlet opening (7) closed, directly into the sleeve (12) and from there can flow back again.
Wie den Fig. 5 und 10 sowie den Fig. 7 und 12 im einzelnen zu entnehmen ist, besitzt die den Deckel bildende Platte (14) einen außen umlaufenden und zum Unterteil (13) hin gerichteten Rand (16), dessen freies Ende etwas nach außen gebogen ist und so eine innenliegende Fase (17) bildet, die das Überschieben des Randes (16) über den Rand (18) der das Unterteil bildenden Platte (13) (Fig. 12) erleichtert. Zum selben Zweck ist das freie Ende des Randes (18) der Platte (13) etwas nach innen gerichtet, so daß dort eine außen liegende Fase (19) entsteht. Der Rand (16) der Platte (14) besitzt seine größte Innenabmessung etwa in seiner Mitte. Hier ist eine umlaufende Vertiefung (20) vorgesehen, die einen stumpfwinkligen Querschnitt mit einem nach außen gerichteten Scheitel aufweist. Korrespondierend ist der Rand (18) so ausgestaltet, daß er außen eine Form aufweist, die dem stumpfwinkligen Querschnitt des Randes (16) in etwa entspricht, wobei der Scheitel des stumpfen Winkels ebenfalls nach außen gerichtet ist, so daß eine umlaufende Kante (21) entsteht, die beim Ineinanderdrücken von Deckel und Unterteil eines Scheibenkörpers (10), d.h. beim Ineinanderdrücken der Platten (14 und 13) in der Vertiefung (20) des äußeren Randes (16) einschnappt. Dabei sind die Abmessungen so gewählt, daß die Ränder (16 und 18) am gesamten Umfang unter Vorspannung aneinanderliegen. Eine solche Vorspannung könnte auch erreicht werden, wenn die Platten elliptisch oder eiförmig ausgelegt sind. Sie könnte nicht bei einer ovalen Form erreicht werden, weil an den parallel zueinander verlaufenden Längsseiten keine definierte elastische Anpreßkraft möglich ist.5 and 10 and FIGS. 7 and 12 can be seen in detail, the plate forming the cover (14) has an outer circumferential edge (16) directed towards the lower part (13), the free end of which slightly follows is bent on the outside and thus forms an internal chamfer (17) which facilitates the sliding of the edge (16) over the edge (18) of the plate (13) forming the lower part (FIG. 12). For the same purpose, the free end of the edge (18) of the plate (13) is directed somewhat inwards, so that there is an external chamfer (19). The edge (16) of the plate (14) has its largest inside dimension approximately in the middle. A circumferential recess (20) is provided here, which has an obtuse-angled cross section with an apex directed outwards. Correspondingly, the edge (18) is designed such that it has a shape on the outside which corresponds approximately to the obtuse-angled cross-section of the edge (16), the apex of the obtuse angle also being directed outwards, so that a circumferential edge (21) arises when you press into each other of the lid and lower part of a disc body (10), that is, when the plates (14 and 13) are pressed together into the recess (20) of the outer edge (16). The dimensions are chosen so that the edges (16 and 18) lie against each other under tension on the entire circumference. Such a prestress could also be achieved if the plates are designed elliptical or egg-shaped. It could not be achieved with an oval shape, because no defined elastic contact force is possible on the parallel longitudinal sides.
Im Bereich der inneren Öffnung (11) ist an der das Unterteil des Scheibenkörpers (10) bildenden Platte (13) ein zum inneren Hohlraum des Scheibenkörpers (10) weisender Durchzug (22) ausgeprägt, der die Öffnung (11) einrahmt und daher mit seinem Innendurchmesser dem Außendurchmesser des Rohres (12) entspricht. Außerdem sind - auch zur Stabilitätserhöhung - nach außen gerichtete Ausprägungen (23) vorgesehen, welche nierenförmige Öffnungen (24) jeweils auf gegenüberliegenden Seiten der Öffnung (11) einrahmen. Die Öffnungen (24) liegen daher in einer Ebene mit dem ringförmigen Bodenbereich der Platte (13), während die Einprägungen (23) um das Maß nach unten ragen, das dem Abstand zwischen zwei benachbarten Scheibenkörpern (10) entspricht.In the area of the inner opening (11) on the plate (13) forming the lower part of the disc body (10) there is a passage (22) pointing towards the inner cavity of the disc body (10) which frames the opening (11) and therefore with it Inner diameter corresponds to the outer diameter of the tube (12). In addition - also to increase stability - outward-directed features (23) are provided, which frame kidney-shaped openings (24) on opposite sides of the opening (11). The openings (24) therefore lie in one plane with the annular bottom region of the plate (13), while the impressions (23) protrude downwards by the amount which corresponds to the distance between two adjacent disc bodies (10).
Die Platte (13) weist aber auch eine von der Ausprägung (23) der linken Öffnung (Fig. 11) radial nach außen verlaufende Einprägung (30) auf, die, wie in Fig. 1 angedeutet ist, eine Trennwand zwischen dem Zuflußstutzen (3) und dem Abflußstutzen (4) für die Kühlflüssigkeit bildet, die auf diese Weise gezwungen ist, im Zwischenraum zwischen zwei Scheibenkörpern (10) den in der Fig. 1 mit den Pfeilen (9) gekennzeichneten Weg zu fließen.However, the plate (13) also has an indentation (30) which extends radially outward from the shape (23) of the left opening (FIG. 11) and which, as indicated in FIG. 1, has a partition between the inflow connector (3 ) and the drain port (4) for the cooling liquid, which is forced in this way to flow in the space between two disc bodies (10) the path marked in Fig. 1 with the arrows (9).
Die den Deckel des Scheibenkörpers (10) bildende Platte (14) ist im Bereich der inneren Öffnung (11) anders ausgebildet. Sie besitzt keinen die Öffnung (11) einrahmenden Rand, sondern sie ist im Bereich von zwei ebenfalls der Öffnung (11) gegenüberliegenden nierenförmigen Öffnungen (25) lediglich mit jeweils einen am inneren Rand der jeweiligen Öffnung (25) vorgesehenen Steg (26) versehen, der die Öffnung (25) nach innen begrenzt und bis kurz vor den Rand der Öffnung (24) der anderen Platte reicht. Die Stege dienen auf diese Weise zur Lenkung des Ölstromes und bewirken, daß das Öl im Sinn der in Fig. 6 gestrichelt eingezeichneten Pfeile durch die Scheiben fließen muß und nicht von einer Öffnung (25) aus innen zur gegenüberliegenden Öffnung fließt. Die Platten (13 und 14) sind in ihrer Lage zueinander im Außenbereich durch die ineinander schnappenden Bereiche (20 und 21) der Ränder (16 und 18) gesichert. Die Fig. 5, 6 und 8 zeigen, daß jede der etwa kreisförmigen Platten (14) mit nach außen gerichteten knopfartigen Ausprägungen (27) versehen ist, die gleichmäßig auf dem Umfang verteilt sind und dazu dienen, die Abstützung gegenüber benachbarten Scheibenkörpern zu bewirken. Die Ausprägungen (27) der Platte (14) stützen sich dabei an korrespondierenden Ausprägungen (28) der Platte (13) (s. Fig. 10, 11 und 13) ab, deren Höhe ebenfalls dem halben Abstand zwischen benachbarten Scheibenkörpern entspricht. Während also die Ausprägungen (23) die Abstützung zu benachbarten Scheibenkörpern im inneren Bereich der Scheibenkörper (10) übernehmen, wird dies durch die Ausprägungen (27 und 28) im Außenbereich der Scheibenkörper bewirkt.The plate (14) forming the cover of the disc body (10) is designed differently in the area of the inner opening (11). they does not have an edge framing the opening (11), but instead is provided in the region of two kidney-shaped openings (25) also opposite the opening (11) with only one web (26) provided on the inner edge of the respective opening (25), the the opening (25) bounds inwards and extends to just before the edge of the opening (24) of the other plate. In this way, the webs serve to guide the oil flow and have the effect that the oil must flow through the disks in the sense of the arrows shown in broken lines in FIG. 6 and does not flow from an opening (25) from the inside to the opposite opening. The position of the plates (13 and 14) in the outer region is secured by the interlocking regions (20 and 21) of the edges (16 and 18). 5, 6 and 8 show that each of the approximately circular plates (14) is provided with outwardly directed button-like features (27) which are evenly distributed over the circumference and serve to provide support against adjacent disc bodies. The features (27) of the plate (14) are based on corresponding features (28) of the plate (13) (see FIGS. 10, 11 and 13), the height of which also corresponds to half the distance between adjacent disk bodies. Thus, while the forms (23) provide support for adjacent pane bodies in the inner region of the pane bodies (10), this is achieved by the forms (27 and 28) in the outer region of the pane bodies.
Aus der Fig. 4 ist gut zu erkennen, daß es keine Schwierigkeiten macht, einzelne Scheibenkörper zunächst durch Zusammenfügen der Platten (13 und 14) herzustellen, die jeweils vor dem Zusammensetzen von Deckel und Unterteil noch mit den entsprechenden Turbulenzeinlagen versehen werden können. Die so gebildeten relativ stabilen Scheibenkörper können dann auf das Rohr (12) aufgefädelt und innerhalb des zunächst noch offenen topfartigen Gehäuses (1) angeordnet werden. Dies kann dabei gleichzeitig unter Zwischenfügung von Lötfolien geschehen, die auch schon zwischen die beiden Platten (13 und 14) eingelegt werden können, ehe diese zusammengedrückt werden. Anstelle der zusätzlichen Einfügung von Lötfolien ist es besser, die Platten (13, 14) unmittelbar mit einer Lotplattierung zu versehen. Ist dies geschehen, so wird der Boden (2) aufgesetzt, der dafür sorgt, daß alle Scheibenkörper mit der notwendigen Axialkraft gegeneinander gedrückt werden. Die so vormontierten Scheiben-Ölkühler werden dann in einem Lötofen verlötet. Durch die gewählte Ausgestaltung ergibt sich eine gute und dichte Verbindung aller Teile.From Fig. 4 it can be clearly seen that it is not difficult to produce individual disc bodies first by joining the plates (13 and 14), which can each be provided with the appropriate turbulence inserts before the cover and lower part are assembled. The relatively stable disk bodies formed in this way can then be threaded onto the tube (12) and arranged within the pot-like housing (1), which is initially still open. This can be done at the same time with the interposition of solder foils, which are already inserted between the two plates (13 and 14) before they are pressed together. Instead of the additional insertion of solder foils, it is better to provide the plates (13, 14) with solder plating directly. Once this has been done, the base (2) is put on, which ensures that all the disk bodies are pressed against one another with the necessary axial force. The pre-assembled disc oil coolers are then soldered in a soldering oven. The selected design results in a good and tight connection of all parts.
Claims (10)
- An oil cooler for an internal combustion engine, consisting of a plurality of disc members (10) disposed like a stack in a housing (1, 2) through which cooling fluid flows and the bottom part of which is formed by one (13) of two inter-fitting plates while the cover is formed by the second plate (14), the edges (16, 18) of the spaced-apart profiled plates (13, 14) being soldered together and enclosing a cavity through which cooling oil passes and which communicates via apertures (24, 25) with the cavities of adjacent disc members, characterised in that the edges (16, 18) are so matched to one another that the outer edge (16) fits with a snap action and under tension on the inner edge (18) while the outer edge (16) comprises an inner encircling depression (20) while the inner edge has an external encircling edge (21), the former engaging with a snap action over the latter, the inner depression (20) on the outer edge (16) corresponding to the apex of an inwardly open obtusely angled depression while the outer encircling edge (21) of the inner edge (18) corresponds to the apex of a likewise inwardly opening obtusely angled cross-section, the size of the two obtuse angles being substantially the same.
- An oil cooler according to Claim 1, characterised in that the plates (13, 14) are of circular or elliptical shape.
- An oil cooler according to Claims 1 and 2, characterised in that both edges (16, 18) of the plates (13 and 14) are in each case provided with an inner and outer chamfer (17, 19) respectively.
- An oil cooler according to one of Claims 1 to 3, characterised in that each of the plates (13, 14) is provided with outwardly directed bulges (27, 28) to ensure the gap between adjacent disc bodies, being evenly distributed around the periphery.
- An oil cooler according to one of Claims 1 to 4, characterised in that the plate (13) forming the bottom part of the disc body (10) is provided with an inwardly directed rail (22) which can be fitted onto a central tube (12).
- An oil cooler according to Claim 5, characterised in that the plate (14) forming the cover has an aperture (11) corresponding to the rail (22) on the other plate (13) and by which it can be pushed onto the tube (12).
- An oil cooler according to one of Claims 1 to 6, characterised in that both plates (13 and 14) have opposite the central aperture (11) apertures (24, 25) for the through-flow of oil and in that means (26) which serve to direct the oil flow and which are situated in the region of the aperture (24) are associated with at least one of the plates located in the region of the aperture (24).
- An oil cooler according to Claim 7, characterised in that the oppositely disposed apertures (24) on the plate (13) which forms the bottom part are in each case framed by outwardly directed bulges (23) the height of which corresponds to the distance between two adjacent disc members.
- An oil cooler according to Claim 6, characterised in that the means provided in the region of the central aperture (11) and intended to direct the oil flow between the two plates (13 and 14) consist of two webs (26) which inwardly define the oppositely disposed apertures (25) of a plate (14) and which extend to just before the edge of the aperture (24) on the other plate (13).
- An oil cooler according to one of Claims 1 to 9, characterised in that there is associated with at least one plate (13, 14) a radially extending bulge (30) which serves as a separating wall between the supply and drain apertures (3, 4) for the cooling fluid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3938253A DE3938253A1 (en) | 1989-11-17 | 1989-11-17 | OIL COOLER FOR AN INTERNAL COMBUSTION ENGINE |
| DE3938253 | 1989-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0428919A1 EP0428919A1 (en) | 1991-05-29 |
| EP0428919B1 true EP0428919B1 (en) | 1993-04-14 |
Family
ID=6393740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90120966A Expired - Lifetime EP0428919B1 (en) | 1989-11-17 | 1990-11-01 | Oil-cooler for a combustion motor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5154225A (en) |
| EP (1) | EP0428919B1 (en) |
| DE (2) | DE3938253A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4040875C2 (en) * | 1990-12-20 | 1994-09-01 | Laengerer & Reich Kuehler | oil cooler |
| FR2712967B1 (en) * | 1993-11-23 | 1996-01-19 | Valeo Thermique Moteur Sa | Leaf heat exchanger, in particular oil radiator for motor vehicle. |
| DE19707647B4 (en) * | 1997-02-26 | 2007-03-01 | Behr Gmbh & Co. Kg | plate cooler |
| FI109148B (en) * | 1997-12-10 | 2002-05-31 | Vahterus Oy | plate heat exchangers |
| US6997238B1 (en) * | 2001-02-27 | 2006-02-14 | W.S. Darley & Co. | Cooler plate and gearbox assembly |
| DE10132120A1 (en) * | 2001-07-03 | 2003-01-16 | Deere & Co | oil cooler |
| US20040173341A1 (en) * | 2002-04-25 | 2004-09-09 | George Moser | Oil cooler and production method |
| CA2384712A1 (en) * | 2002-05-03 | 2003-11-03 | Michel St. Pierre | Heat exchanger with nest flange-formed passageway |
| DE102004004975B4 (en) * | 2004-01-31 | 2015-04-23 | Modine Manufacturing Co. | Plate heat exchangers |
| ITBO20040636A1 (en) * | 2004-10-15 | 2005-01-15 | Teclab S C R L | HEAT RECOVERY DEVICE FOR SMOKE CONDENSATION |
| US7178581B2 (en) | 2004-10-19 | 2007-02-20 | Dana Canada Corporation | Plate-type heat exchanger |
| DE102005050738A1 (en) * | 2005-10-22 | 2007-04-26 | Modine Manufacturing Co., Racine | Plate-type heat exchanger for air cooling has aperture edges in at least first part of connection plate with deformations forming part of inflow and outflow channels |
| DE112013005225T5 (en) | 2012-10-31 | 2015-08-06 | Dana Canada Corporation | Heat exchangers of stacked plates with only one plate design |
| DE102016014934A1 (en) * | 2016-12-15 | 2018-06-21 | Man Truck & Bus Ag | A method of providing a finned radiator, radiator and motor vehicle with a radiator |
| DE102020207337A1 (en) * | 2020-06-15 | 2021-12-16 | Robert Bosch Gesellschaft mit beschränkter Haftung | Device for improving the cooling of a gearbox housing |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR580039A (en) * | 1924-04-11 | 1924-10-28 | C Ad Hubert | Cellular construction made up of removable elements, in the form of plates, applicable to heat exchangers |
| US2222721A (en) * | 1936-04-13 | 1940-11-26 | Gen Motors Corp | Oil cooler |
| GB488571A (en) * | 1937-01-09 | 1938-07-11 | Andrew Swan | Improvements in plate heat exchangers for fluids |
| US2511084A (en) * | 1947-11-07 | 1950-06-13 | Young Radiator Co | Heat-exchanger core |
| DE2306426A1 (en) * | 1973-02-09 | 1974-08-15 | Modine Mfg Co | HEAT EXCHANGER |
| FR2319869A1 (en) * | 1975-07-29 | 1977-02-25 | Ferodo Sa | Plates for plate type heat exchangers - have varying types of flanged edges that clip together to form an impervious seal |
| IT1159723B (en) * | 1978-06-14 | 1987-03-04 | Ipra Spa Ora Ind Piemontese Ra | PLATE HEAT EXCHANGER |
| DE2843423B1 (en) * | 1978-10-05 | 1979-12-06 | Volkswagenwerk Ag | Oil cooler with disk-like oil chambers for an internal combustion engine |
| US4501321A (en) * | 1982-11-10 | 1985-02-26 | Blackstone Corporation | After cooler, charge air cooler and turbulator assemblies and methods of making the same |
| JPS59191888A (en) * | 1983-04-13 | 1984-10-31 | Nippon Denso Co Ltd | Heat exchanger |
| US4561494A (en) * | 1983-04-29 | 1985-12-31 | Modine Manufacturing Company | Heat exchanger with back to back turbulators and flow directing embossments |
| US4669532A (en) * | 1984-04-23 | 1987-06-02 | Kabushiki Kaisha Tsuchiya Seisakusho | Heat exchanger with temperature responsive bypass |
| JPS6183883A (en) * | 1984-09-29 | 1986-04-28 | Hisaka Works Ltd | Plate heat exchanger |
| US4708199A (en) * | 1985-02-28 | 1987-11-24 | Kabushiki Kaisha Tsuchiya Seisakusho | Heat exchanger |
| JPH073315B2 (en) * | 1985-06-25 | 1995-01-18 | 日本電装株式会社 | Heat exchanger |
| JPS6273089A (en) * | 1985-09-24 | 1987-04-03 | Nippon Denso Co Ltd | Heat exchanger |
| SE462059B (en) * | 1986-12-19 | 1990-04-30 | Blackstone Sweden | HEAT EXCHANGE WITH FLAT ROUTES, WHICH ROOTS ARE CREATED BY TWO HALFS WITH OVERLAPPING FLANES |
| US4892136A (en) * | 1986-12-31 | 1990-01-09 | Kabushiki Kaisha Tsuchiya Seisakusho | Heat exchanger |
| US4967835A (en) * | 1989-08-21 | 1990-11-06 | Modine Manufacturing Company, Inc. | Filter first donut oil cooler |
-
1989
- 1989-11-17 DE DE3938253A patent/DE3938253A1/en not_active Withdrawn
-
1990
- 1990-11-01 DE DE9090120966T patent/DE59001201D1/en not_active Expired - Fee Related
- 1990-11-01 EP EP90120966A patent/EP0428919B1/en not_active Expired - Lifetime
- 1990-11-15 US US07/613,015 patent/US5154225A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59001201D1 (en) | 1993-05-19 |
| EP0428919A1 (en) | 1991-05-29 |
| DE3938253A1 (en) | 1991-05-23 |
| US5154225A (en) | 1992-10-13 |
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