EP0980504A1 - Device for protecting the radiator of a motor vehicle against projected particles - Google Patents

Device for protecting the radiator of a motor vehicle against projected particles

Info

Publication number
EP0980504A1
EP0980504A1 EP98925538A EP98925538A EP0980504A1 EP 0980504 A1 EP0980504 A1 EP 0980504A1 EP 98925538 A EP98925538 A EP 98925538A EP 98925538 A EP98925538 A EP 98925538A EP 0980504 A1 EP0980504 A1 EP 0980504A1
Authority
EP
European Patent Office
Prior art keywords
web
tubes
armor
protection device
radiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98925538A
Other languages
German (de)
French (fr)
Other versions
EP0980504B1 (en
Inventor
Horst Schicht
Manfred Gieras
Marinus Huisman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP0980504A1 publication Critical patent/EP0980504A1/en
Application granted granted Critical
Publication of EP0980504B1 publication Critical patent/EP0980504B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers

Definitions

  • the invention relates to a protective device against impinging particles for a radiator in a motor vehicle according to the preamble of claim 1.
  • Radiators in motor vehicles generally consist of a plurality of cooling tubes, which are arranged in parallel at intervals as web tubes and which are connected to one another by selected heat dissipation plates. Round tubes or flat tubes are used as media-carrying cooling tubes. Such coolers are used, for example, as heat exchangers in the engine cooling circuit or as condensers in an air conditioning system in the vehicle.
  • coolers are usually arranged in the front area of the vehicle at a location that can be easily flowed through by the wind.
  • a cooling air flow can particles such. B. small gravel, with it, especially when overtaking, oncoming traffic and convoys on roads with insufficiently paved ground.
  • the cooling tube walls are dimensioned as thin as possible, so that the coolant-carrying web tubes can be mechanically damaged by such particles. Less critical damage to the surface coating can occur, but the thin-walled standpipes can also be leaked. This leads to a failure of the engine cooling system and the vehicle stopping in connection with costly repairs.
  • Known generic protective devices for a motor vehicle radiator against impinging particles consist of differently designed protective grids which are arranged at a distance from a radiator.
  • simple protective grilles as a grille
  • special protective grille designs are known.
  • a fine-mesh, flat wire mesh in an interchangeable frame in front of a vehicle cooler is known (DE 36 29 880 A1), with which contaminants in particular are to be kept away from the radiator fins.
  • a fine-mesh wire mesh however, clogs itself up with impurities and then disadvantageously hinders the air throughput through the cooler and considerably reduces the cooling capacity.
  • radiators in particular for insects, consists of a grid-like arrangement of vertical, parallel metal strips which are attached at an angle of 45 ° with respect to the longitudinal direction of the vehicle. This means that impinging particles should no longer hit the radiator block directly, but should be deflected according to the angle of attack of the metal strips. However, the cooling air flow is deflected and reduced accordingly. This arrangement is therefore also complex and leads to a reduction in the cooling capacity.
  • a spiral wound from a flat metal strip is used (DE-OS 1 755 802).
  • an embodiment of a radiator grille from a flexible band is known (DE 44 25 196 A1), which can be wound up and unwound automatically and cleaned in the process. This represents a very complex design, which is particularly ineligible for passenger cars for reasons of cost.
  • radiator grilles have the common disadvantage that they are intended to protect the radiator surface, which is at risk from a particle impact, overall and globally. This requires a small mesh size for good protection, however, which leads to an unfavorable reduction in the cooling air flow.
  • protective grids arranged separately at a distance from a radiator are complex to manufacture, require space and weight due to their required stability and brackets.
  • Protective grids are also known at air inlet openings of housings and encapsulations, in particular engine compartment encapsulations (DE 37 03 716 A1; DE 40 15 304 A1), the cross-sections of which contain cross-sectional profile shapes with undercuts and / or combinations of different materials in order to allow particles and Reduce foreign bodies.
  • a spatial assignment to a vehicle radiator is not available here.
  • the object of the invention is to provide a protective device against impinging particles for a radiator in a motor vehicle, which does not or only slightly influences the cooling air flow with a good protective function and is simple and inexpensive to produce in a space-saving and weight-saving arrangement.
  • the previous principle of global protection of the entire radiator surface loaded by impinging particles is abandoned.
  • This is based on the knowledge that the areas between the web tubes in any case represent throughflow openings and the end edges of heat dissipation plates oriented in the direction of flow, which point here in the direction of flow, are relatively insensitive to impinging particles.
  • even more severe damage in the intermediate areas of web tubes cannot lead to a malfunction of the cooler, since cooling medium only flows in the web tubes.
  • the web tubes, which are sensitive to damage are provided with armor directly and without spacing directly in vulnerable areas, which ensures mechanical protection against impinging particles.
  • this armor directly touches the endangered tube walls is assigned and for a good protective function only has to have the same or only a slightly larger width than the endangered web tube areas, the cooling air throughput is advantageously not or only slightly reduced by the protective device.
  • a protective device is simple and inexpensive to manufacture and can be installed in a small space.
  • such armor is to be attached directly to the bridge tube walls and therefore does not require any additional, separate, separate brackets from the cooler.
  • the armor consists of a thickening of the material of the endangered tube walls compared to other tube walls.
  • Previous manufacturing processes for web tubes, in particular continuous casting processes, can continue to be used, as can previous assembly processes. Due to the material thickening that is only used in a targeted manner at the endangered tube wall areas, the weight of the cooler is increased only slightly and is less than the weight of an arrangement consisting of a weight-optimized, thin-walled cooler with a separate protective grille device.
  • the thickening of the material provides effective protection against denting and leakage due to impacting particles and also increases the stability of the standpipes and thus the entire cooler.
  • An alternative embodiment of armor which can optionally be used in addition to the material thickening described above, consists of a caterpillar of elastic material applied to the web tube walls which are at risk of particle flight. This application is advantageously carried out automatically in the manufacture of the web tubes. Silicone, polyurethane or other similar materials can be used as the elastic material. An applied caterpillar can also protrude somewhat over an area at risk of impact, so that this area is not only covered but somewhat overlapped for very secure particle impact protection. With this measure, the cooler flow is influenced only slightly.
  • a thickening of material on only one side of a web tube may be difficult to recognize when installing a cooler.
  • the armor consists of covering tube rails arranged on and covered by the particle tube walls which are loaded and endangered by particle flight.
  • These cover rails are expediently connected to form a lattice part, the cover rails being arranged in the lattice network at a distance from the web tube walls to be covered.
  • the cover rails or the grid part can be clipped directly onto the web tubes or clipped into the spaces between them.
  • the required clips can be molded directly onto the cover rails or the grid part or can be designed as separate clip pieces.
  • the cover rails, or the lattice part and the clips can be made from sheet metal or preferably from plastic as plastic injection molded parts.
  • the cover rails used here can also have a somewhat larger width than the web tube wall areas to be covered. Since the tube wall areas to be covered have only a small expansion, in particular in the case of flat tubes, in comparison to the entire cooler surface, an increase in the width of the cover rails by 20% to 30% compared to the width of the vulnerable tube walls only has an insignificant influence on the cooling air throughput.
  • the web tubes as flat tubes have an elongated, narrow and rectangular cross section, each with two opposite narrow sides and broad sides.
  • cooling medium-carrying longitudinal chambers are formed by several parallel webs lying between the broad sides.
  • the narrow sides of the web tubes are the areas at risk of impact due to particle flight and are formed by the outer webs that support the armor.
  • the armoring of these lateral outer webs consists, according to the above statements, of a material thickening and / or an applied bead of elastic material and / or of a direct covering by a cover rail or by a corresponding grid part.
  • the outlay for the protective device according to the invention can advantageously be reduced, if necessary, in that only heavily endangered cooler areas or web tube areas are covered by armor according to the invention.
  • FIG. 1 is a perspective view of a portion of a cooler with a protective device for a motor vehicle in a first embodiment
  • Fig. 2 is a corresponding view of a second embodiment
  • Fig. 3 shows a corresponding view of a third embodiment.
  • a portion of a radiator 1 for a motor vehicle is shown with horizontal, parallel web tubes 2, 3, 4, 5, 6, which are connected by corrugated heat dissipation plates 7, 8, 9, 10.
  • the web tubes 2 to 6 are designed as flat tubes with an elongated, narrow, rectangular cross section, each with two opposite narrow sides 11, 12 and broad sides 13, 14.
  • parallel webs 15 run as a connection between the respective broad sides 13, 14, through which longitudinal chambers 16, here six longitudinal chambers 16, for guiding a cooling medium (arrow 20) are formed.
  • the outer webs 17, 18 which laterally delimit the web tubes 2 to 6 form the narrow sides 11, 12 and, as compared to the other wall areas of the web tubes 2 to 6, have a material thickening as armor.
  • this is arranged in the front of a motor vehicle such that it is flown and flowed through with a flow of cooling air in the direction of the outer webs 18 and through the corrugation of the heat dissipation plates 7 to 11, as indicated by the arrow 19.
  • the cooling air flow (arrow 19) carries particles, such as small stones, sand, etc.
  • the material thickening and armouring of the outer webs 17 opposite the particle flight prevent the cooler from being twisted during assembly the web tubes 2 to 6, an unarmored outer web is arranged in the direction of particle flight.
  • the material thickenings contribute to an increase in stability of the individual web tubes 2 to 6 and thus of the entire cooler 1.
  • FIG. 2 shows an alternative embodiment of a cooler 1, which essentially corresponds to the embodiment according to FIG. 1, so that the same parts are given the same reference numerals.
  • Web tubes 2 to 6 are also used here, which are connected by corrugated heat dissipation plates 7 to 10.
  • longitudinal chambers 16 are formed by webs through which coolant flows during operation (arrow 20).
  • the direction of installation of the cooler is indicated in connection with the direction of a particle flight (arrow 20).
  • a bead 21 made of elastic material, preferably made of silicone or polyurethane, being applied to the narrow sides 11 which are directed against the particle flight (arrow 20) or the outer webs 18.
  • This application can take place in an automated production step together with the production of the web tubes 2 to 6. Impacting particles (arrow 20) cannot damage the web tubes 2 to 6 and in particular do not leak through this armor.
  • a partial area of a cooler 1 corresponding to FIG. 1 is again shown, which is additionally covered with armor by a grid part 22 in relation to a particle flight direction.
  • the grid part 22 consists of horizontal and parallel cover rails 23 which are connected by vertical webs 25 and which, in the assembled state, the narrow sides 11 of the web tubes 2 to 6 or their outer webs 18 cover.
  • the grid part 22 can be fastened to the web tubes 2 to 6 or in the spaces between them with molded clips 24 or possibly with separate clips 26 (alternatively shown in broken lines).
  • the cover rails 23 can also be clipped onto the respective web tubes 2 to 6 individually without a lattice structure.
  • the grid part 22 is produced as a plastic injection-molded part.
  • a grille part 22 attached in this way to the cooler 1 provides effective protection against damage from particle flight and in particular prevents the tube tubes 2 to 6 from leaking.
  • the protective effect can be increased in that the covering width of the cover rails 23 is chosen to be 20% to 30% larger is the width of the associated narrow sides 11 of the web tubes 2 to 6.
  • FIGS. 1 to 3 it may be sufficient to use the armor shown in FIGS. 1 to 3 only on a cooler where there are particularly vulnerable places due to particle flight.

Abstract

A device is disclosed for protecting the radiator (1) of a motor vehicle against projected particles. The radiator (1) has spaced apart ribbed pipes (2 to 6) for conveying the cooling medium. According to the invention, the ribbed pipe walls, which in the assembled state of the radiator (1) are oriented in the direction of projected particles (arrow 19) and mechanically stressed, are only protected against particle blows by a plating which directly covers them and is mechanically joined thereto without any gap. This plating is preferably a mere material thickening (18) of the ribbed pipes, a bead (21) of elastic material applied on the ribbed pipes and/or a covering strip (23) clipped on the ribbed pipes, several covering strips (23) being appropriately designed as a grid (22).

Description

Schutzeinrichtung gegen auftreffende Partikel für einen Kühler in einem Kraftfahrzeug Protection device against impinging particles for a radiator in a motor vehicle
Die Erfindung betrifft eine Schutzeinrichtung gegen auftreffende Partikel für einen Kühler in einem Kraftfahrzeug nach dem Oberbegriff des Anspruchs 1.The invention relates to a protective device against impinging particles for a radiator in a motor vehicle according to the preamble of claim 1.
Kühler in Kraftfahrzeugen bestehen in der Regel aus einer Vielzahl in Abständen parallel liegenden Kühlrohren als Stegrohre, die durch gewählte Wärmeableitbleche miteinander verbunden sind. Als medienführende Kühlrohre werden Rundrohre oder Flachrohre verwendet. Solche Kühler werden beispielsweise als Wärmetauscher im Motorkühlkreis oder als Kondensatoren in einer Klimaanlage im Fahrzeug eingesetzt.Radiators in motor vehicles generally consist of a plurality of cooling tubes, which are arranged in parallel at intervals as web tubes and which are connected to one another by selected heat dissipation plates. Round tubes or flat tubes are used as media-carrying cooling tubes. Such coolers are used, for example, as heat exchangers in the engine cooling circuit or as condensers in an air conditioning system in the vehicle.
Um eine effektive Kühlleistung zu erhalten, werden solche Kühler üblicherweise im Fahrzeugfrontbereich an einer gut durch den Fahrtwind anströmbaren Stelle angeordnet. Ein solcher kühlender Luftstrom kann Partikel, wie z. B. kleine Schottersteinchen, mit sich führen, insbesondere beim Überholen, Gegenverkehr und Kollonnenfahrten auf Straßen mit unzureichend befestigtem Untergrund. Zur Gewichtsreduzierung der Kühler und für einen guten Wärmeaustausch zwischen der Kühlluft und dem Kühlmedium werden die Kühlrohrwände möglichst dünnwandig dimensioniert, so daß durch solche Partikel die kühlmedium- führenden Stegrohre mechanisch beschädigt werden können. Dabei können weniger kritische Beschädigungen der Oberflächenbeschichtung auftreten, jedoch können die dünnwandigen Stegrohre auch leckgeschlagen werden. Dies führt zu einem Ausfall der Motorkühlung und zum Liegenbleiben des Fahrzeugs in Verbindung mit aufwendigen Reparaturen.In order to obtain an effective cooling performance, such coolers are usually arranged in the front area of the vehicle at a location that can be easily flowed through by the wind. Such a cooling air flow can particles such. B. small gravel, with it, especially when overtaking, oncoming traffic and convoys on roads with insufficiently paved ground. To reduce the weight of the cooler and for a good heat exchange between the cooling air and the cooling medium, the cooling tube walls are dimensioned as thin as possible, so that the coolant-carrying web tubes can be mechanically damaged by such particles. Less critical damage to the surface coating can occur, but the thin-walled standpipes can also be leaked. This leads to a failure of the engine cooling system and the vehicle stopping in connection with costly repairs.
Zur Reduzierung dieser allgemein bekannten Probleme wurden bereits eine Mehrzahl von Vorschlägen gemacht: Bekannte gattungsgemäße Schutzeinrichtungen für einen Kraftfahrzeugkühler gegen auftreffende Partikel bestehen aus unterschiedlich ausgebildeten Schutzgittern, die in einem Abstand vor einem Kühler angeordnet sind. Neben an sich bekannten, einfachen Schutzgittern als Kühlergrill sind spezielle Schutzgitterausführungen bekannt. Beispielsweise ist ein feinmaschiges, flächiges Drahtgewebe in einem auswechselbaren Rahmen vor einem Fahrzeugkühier bekannt (DE 36 29 880 A1), mit dem insbesondere Verunreinigungen von den Kühlerlamellen ferngehalten werden sollen. Ein feinmaschiges Drahtgewebe setzt sich jedoch selbst mit Verunreinigungen zu und behindert dann nachteilig den Luftdurchsatz durch den Kühler und reduziert erheblich die Kühlleistung.A number of proposals have already been made to reduce these well-known problems: Known generic protective devices for a motor vehicle radiator against impinging particles consist of differently designed protective grids which are arranged at a distance from a radiator. In addition to known, simple protective grilles as a grille, special protective grille designs are known. For example, a fine-mesh, flat wire mesh in an interchangeable frame in front of a vehicle cooler is known (DE 36 29 880 A1), with which contaminants in particular are to be kept away from the radiator fins. A fine-mesh wire mesh, however, clogs itself up with impurities and then disadvantageously hinders the air throughput through the cooler and considerably reduces the cooling capacity.
in einer weiter bekannten Schutzgitteranordung vor einem Kühler (DE 39 16 920 A1), werden vor dem Kühler in einem gegenseitigen Abstand zwei Schutzgitter mit versetzten Maschenanordnungen angebracht, wodurch bei gleicher Schutzwirkung ein größerer Maschendurchmesser und damit eine verbesserte Kühleranströmung möglich sein soll. Eine solche Anordnung mit zwei separat gehaltenen Schutzgittern ist jedoch aufwendig und kostenintensiv.In a further known protective grille arrangement in front of a cooler (DE 39 16 920 A1), two protective grids with staggered mesh arrangements are attached in front of the cooler at a mutual distance, whereby a larger mesh diameter and thus an improved radiator flow should be possible with the same protective effect. However, such an arrangement with two protective grids held separately is complex and cost-intensive.
Eine zudem bekannte Schutzvorrichtung für Kühler (DE-GB 93 12491), insbesondere für Insekten, besteht aus einer gitterartigen Anordnung von senkrechten, parallelen Blechstreifen, die in einem Anstellwinkel von 45° gegenüber der Fahrzeuglängsrichtung angebracht sind. Damit sollen auftreffende Partikel nicht mehr direkt auf den Kühlerblock auftreffen, sondern entsprechend dem Anstellwinkel der Blechstreifen abgelenkt werden. Entsprechend wird jedoch auch der kühlende Luftstrom abgelenkt und reduziert. Diese Anordnung ist somit ebenfalls aufwendig und führt zu einer Verringerung der Kühlleistung.Another known protective device for radiators (DE-GB 93 12491), in particular for insects, consists of a grid-like arrangement of vertical, parallel metal strips which are attached at an angle of 45 ° with respect to the longitudinal direction of the vehicle. This means that impinging particles should no longer hit the radiator block directly, but should be deflected according to the angle of attack of the metal strips. However, the cooling air flow is deflected and reduced accordingly. This arrangement is therefore also complex and leads to a reduction in the cooling capacity.
In einer anderen bekannten Ausbildung eines Kühlerschutzgitters in einem Abstand vor einem Kühler wird eine aus einem flachen Metallband gewickelte Spirale verwendet (DE-OS 1 755 802). Zudem ist eine Ausführung eines Kühlerschutzgitters aus einem biegsamen Band bekannt (DE 44 25 196 A1), das selbsttätig auf- und abgewickelt und dabei gereinigt werden kann. Dies stellt eine sehr aufwendige Ausführung dar, die insbesondere für Personenkraftwagen aus Kostengründen ausscheidet.In another known embodiment of a radiator grille at a distance in front of a radiator, a spiral wound from a flat metal strip is used (DE-OS 1 755 802). In addition, an embodiment of a radiator grille from a flexible band is known (DE 44 25 196 A1), which can be wound up and unwound automatically and cleaned in the process. This represents a very complex design, which is particularly ineligible for passenger cars for reasons of cost.
Alle vorstehend genannten Kühlerschutzgitter haben den gemeinsamen Nachteil, daß sie die durch einen Partikelaufschlag gefährdete Kühlerfläche insgesamt und global schützen sollen. Dazu ist für eine gute Schutzwirkung eine geringe Gittermaschenweite erforderlich, was jedoch zu einer ungünstigen Verringerung des Kühlluftstroms führt. Zudem sind separat in einem Abstand vor einem Kühler angeordnete Schutzgitter durch deren erforderlicher Stabilität und Halterungen aufwendig in der Herstellung, im Platzbedarf und im Gewicht.All of the above-mentioned radiator grilles have the common disadvantage that they are intended to protect the radiator surface, which is at risk from a particle impact, overall and globally. This requires a small mesh size for good protection, however, which leads to an unfavorable reduction in the cooling air flow. In addition, protective grids arranged separately at a distance from a radiator are complex to manufacture, require space and weight due to their required stability and brackets.
Weiter sind Schutzgitter an Lufteintrittsöffnungen von Gehäusen und Kapselungen, insbesondere von Motorraumkapselungen bekannt (DE 37 03 716 A1; DE 40 15 304 A1), deren Gitterstege im Querschnitt Profilformen mit Hinterschneidungen und/oder Kombinationen aus unterschiedlichen Werkstoffen enthalten, um die Eindringmöglichkeit für Partikel und Fremdkörper zu reduzieren. Eine räumliche Zuordnung zu einem Fahrzeugkühler liegt hier nicht vor.Protective grids are also known at air inlet openings of housings and encapsulations, in particular engine compartment encapsulations (DE 37 03 716 A1; DE 40 15 304 A1), the cross-sections of which contain cross-sectional profile shapes with undercuts and / or combinations of different materials in order to allow particles and Reduce foreign bodies. A spatial assignment to a vehicle radiator is not available here.
Aufgabe der Erfindung ist es, eine Schutzeinrichtung gegen auftreffende Partikel für einen Kühler in einem Kraftfahrzeug zu schaffen, die bei guter Schutzfunktion den Kühlluftstrom nicht oder nur wenig beeinflußt und dabei in einer platzsparenden und gewichtsgünstigen Anordnung einfach und preisgünstig herstellbar ist.The object of the invention is to provide a protective device against impinging particles for a radiator in a motor vehicle, which does not or only slightly influences the cooling air flow with a good protective function and is simple and inexpensive to produce in a space-saving and weight-saving arrangement.
Diese Aufgabe wird mit den Merkmaien des Anspruch 1 gelöst.This object is achieved with the features of claim 1.
Gemäß Anspruch 1 weisen die im eingebauten Zustand des Kühlers in Richtung auftreffender Partikel gerichteten und dadurch mechanisch belasteten Stegrohrwände eine nur diese abdeckende und mit diesen ohne Abstand verbundene Panzerung als Partikelschlagschutz auf.According to claim 1, in the installed state of the cooler directed in the direction of impinging particles and thus mechanically stressed web tube walls only armor covering this and connected with them without spacing as particle impact protection.
Mit der erfindungsgemäßen Kühlerschutzeinrichtung wird das bisherige Prinzip eines globalen Schutzes der gesamten durch auftreffende Partikel belasteten Kühlerfläche verlassen. Dem liegt die Erkenntnis zugrunde, daß die Bereiche zwischen den Stegrohren ohnehin Durchströmöffnungen darstellen und die hier ggf. in Strömungsrichtung weisenden Stirnränder von in Strömungsrichtung ausgerichteten Wärmeableitblechen sind gegen auftreffende Partikel relativ unempfindlich sind. Zudem können selbst stärkere Beschädigungen in den Zwischenbereichen von Stegrohren zu keinem Funktionsausfall des Kühlers führen, da Kühlmedium ausschließlich in den Stegrohren strömt. Die gegen Beschädigungen empfindlichen Stegrohre werden hier unmittelbar und ohne Abstand direkt in gefährdeten Stellen mit einer Panzerung versehen, die einen mechanischen Schutz gegen auftreffende Partikel gewährleistet. Da diese Panzerung unmittelbar den gefährdeten Stegrohrwänden zugeordnet ist und für eine gute Schutzfunktion lediglich eine gleiche oder nur geringfügig größere Breite als die gefährdeten Stegrohrbereiche aufweisen muß, ist der Kühlluftdurchsatz durch die Schutzeinrichtung vorteilhaft nicht oder allenfalls geringfügig reduziert. Eine solche Schutzeinrichtung ist einfach und preisgünstig herzustellen und mit geringem Platzbedarf anzubringen. Insbesondere ist eine solche Panzerung direkt an den Stegrohrwänden anzubringen und erfordert daher keine zusätzlichen, gegenüber dem Kühler separaten, beabstandeten Halterungen.With the radiator protection device according to the invention, the previous principle of global protection of the entire radiator surface loaded by impinging particles is abandoned. This is based on the knowledge that the areas between the web tubes in any case represent throughflow openings and the end edges of heat dissipation plates oriented in the direction of flow, which point here in the direction of flow, are relatively insensitive to impinging particles. In addition, even more severe damage in the intermediate areas of web tubes cannot lead to a malfunction of the cooler, since cooling medium only flows in the web tubes. The web tubes, which are sensitive to damage, are provided with armor directly and without spacing directly in vulnerable areas, which ensures mechanical protection against impinging particles. Because this armor directly touches the endangered tube walls is assigned and for a good protective function only has to have the same or only a slightly larger width than the endangered web tube areas, the cooling air throughput is advantageously not or only slightly reduced by the protective device. Such a protective device is simple and inexpensive to manufacture and can be installed in a small space. In particular, such armor is to be attached directly to the bridge tube walls and therefore does not require any additional, separate, separate brackets from the cooler.
In einer besonders einfach herstellbaren Ausführungsform nach Anspruch 2 wird vorgeschlagen, daß die Panzerung aus einer Materialverdickung der gefährdeten Stegrohrwände gegenüber anderen Stegrohrwänden besteht. Bisherige Herstellverfahren von Stegrohren, insbesonders Stranggießverfahren können dazu weiter eingesetzt werden, ebenso bisherige Montageverfahren. Durch die nur gezielt an den gefährdeten Stegrohrwandbereichen eingesetzten Materialverdickungen wird das Gewicht des Kühlers nur geringfügig erhöht und liegt unter dem Gewicht einer Anordnung aus einem gewichtsoptimierten, dünnwandigen Kühler mit separater, vorgesetzter Schutzgittereinrichtung. Die Materialverdickung stellt einen wirksamen Schutz gegen ein Einbeulen und eine Leckage durch auftreffende Partikel dar und erhöht zudem die Stabilität der Stegrohre und damit des gesamten Kühlers.In a particularly simple to produce embodiment according to claim 2 it is proposed that the armor consists of a thickening of the material of the endangered tube walls compared to other tube walls. Previous manufacturing processes for web tubes, in particular continuous casting processes, can continue to be used, as can previous assembly processes. Due to the material thickening that is only used in a targeted manner at the endangered tube wall areas, the weight of the cooler is increased only slightly and is less than the weight of an arrangement consisting of a weight-optimized, thin-walled cooler with a separate protective grille device. The thickening of the material provides effective protection against denting and leakage due to impacting particles and also increases the stability of the standpipes and thus the entire cooler.
Eine alternative Ausführungsform einer Panzerung, die ggf. zusätzlich zur vorstehend erläuterten Materialverdickung verwendbar ist, besteht aus einer auf die durch einen Partikelflug gefährdeten Stegrohrwände aufgetragenen Raupe aus elastischem Material. Diese Auftragung wird vorteilhaft bei der Herstellung der Stegrohre automatisch durchgeführt. Als elastisches Material können Silicon, Polyurethan oder andere ähnliche Materialien verwendet werden. Eine aufgetragene Raupe kann hier auch über einen aufschlaggefährdeten Bereich etwas überstehen, so daß dieser Bereich für einen sehr sicheren Partikelaufschlagschutz nicht nur abgedeckt sondern etwas übergriffen ist. Mit dieser Maßnahme wird die Kühlerdurchströmung nur geringfügig beeinflußt.An alternative embodiment of armor, which can optionally be used in addition to the material thickening described above, consists of a caterpillar of elastic material applied to the web tube walls which are at risk of particle flight. This application is advantageously carried out automatically in the manufacture of the web tubes. Silicone, polyurethane or other similar materials can be used as the elastic material. An applied caterpillar can also protrude somewhat over an area at risk of impact, so that this area is not only covered but somewhat overlapped for very secure particle impact protection. With this measure, the cooler flow is influenced only slightly.
Eine nur einseitige Materialverdickung an einem Stegrohr ist ggf. bei einer Montage eines Kühlers nur schwer erkennbar. Um eine falsche Montage der Stegrohre mit der materialverdickten Wandseite zur partikelabgewandten Richtung zu vermeiden, kann zweckmäßig sein, insbesondere bei Flachrohren beide gegenüberliegende Schmalseiten mit Materialverdickun- gen als Panzerungen zu versehen. Dadurch sind Seitenverwechsiungen der Stegrohre ausgeschlossen.A thickening of material on only one side of a web tube may be difficult to recognize when installing a cooler. In order to avoid incorrect assembly of the web tubes with the material-thickened wall side to the direction away from the particle, it may be expedient, particularly in the case of flat tubes, to have both opposite narrow sides with material thickening. to be provided as armor. This prevents confusion between the side tubes.
In einer weiteren, alternativen Ausführungsform besteht die Panzerung aus an den durch Partikelflug belasteten und gefährdeten Stegrohrwänden angeordneten und diese abdeckenden Abdeckschienen. Zweckmäßig werden diese Abdeckschienen zu einem Gitterteil verbunden, wobei die Abdeckschienen im Abstand der abzudeckenden Stegrohrwände im Gitterverbund angeordnet sind. Die Abdeckschienen oder das Gitterteil können unmittelbar an den Stegrohren aufgeklipst oder in deren Zwischenräume eingeklipst werden. Die erforderlichen Klipse können dabei unmittelbar an die Abdeckschienen oder das Gitterteil angeformt oder als separate Klipsstücke ausgeführt sein. Die Abdeckschienen, bzw. das Gitterteil und die Klipse können aus Blech oder bevorzugt aus Kunststoff als Kunststoffspritzteile hergestellt sein.In a further, alternative embodiment, the armor consists of covering tube rails arranged on and covered by the particle tube walls which are loaded and endangered by particle flight. These cover rails are expediently connected to form a lattice part, the cover rails being arranged in the lattice network at a distance from the web tube walls to be covered. The cover rails or the grid part can be clipped directly onto the web tubes or clipped into the spaces between them. The required clips can be molded directly onto the cover rails or the grid part or can be designed as separate clip pieces. The cover rails, or the lattice part and the clips can be made from sheet metal or preferably from plastic as plastic injection molded parts.
Ähnlich wie die vorstehend erläuterten, aufgetragenen Raupen aus elastischem Material können auch die hier verwendeten Abdeckschienen eine etwas größere Breite als die abzudeckenden Stegrohrwaπdbereiche aufweisen. Da die abzudeckenden Stegrohrwandbereiche insbesondere bei Flachrohren im Vergleich zur gesamten Kühlerfläche nur eine geringe Ausdehnung aufweisen, führt eine Vergrößerung der Breite der Abdeckschienen um 20 % bis 30 % gegenüber der Breite der gefährdeten Stegrohrwände nur zu einer unwesentlichen Beeinflussung des Kühlluftdurchsatzes.Similar to the above-described applied beads made of elastic material, the cover rails used here can also have a somewhat larger width than the web tube wall areas to be covered. Since the tube wall areas to be covered have only a small expansion, in particular in the case of flat tubes, in comparison to the entire cooler surface, an increase in the width of the cover rails by 20% to 30% compared to the width of the vulnerable tube walls only has an insignificant influence on the cooling air throughput.
In einer konkreten, besonders bevorzugten Ausführungsform weisen die Stegrohre als Flachrohre einen langgestreckten, schmalen und rechteckigen Querschnitt mit je zwei gegenüberliegenden Schmalseiten und Breitseiten auf. In den Stegrohren sind durch mehrere parallele, zwischen den Breitseiten liegende Stege kühlmediumführende Längskammern gebildet. Die Schmalseiten der Stegrohre sind hier die durch einen Partikelflug aufschlaggefährdeten Bereiche und werden durch die Panzerung tragende Außenstege gebildet. Die Panzerung dieser seitlichen Außenstege besteht entsprechend der vorstehenden Ausführungen aus einer Materiaiverdickung und/oder einer aufgetragenen Raupe aus elastischem Material und/oder aus einer unmittelbaren Abdeckung durch eine Abdeckschiene oder durch ein entsprechendes Gitterteil. Bei Verwendung der erfindungsgemäßen Schutzeinrichtung können im wesentlichen alle Einbaumaße, Montagevorrich- tungen und Halterungen beibehalten werden, wie sie für entsprechende Kühler ohne die erfindungsgemäße Schutzeinrichtung eingesetzt sind.In a specific, particularly preferred embodiment, the web tubes as flat tubes have an elongated, narrow and rectangular cross section, each with two opposite narrow sides and broad sides. In the web tubes, cooling medium-carrying longitudinal chambers are formed by several parallel webs lying between the broad sides. The narrow sides of the web tubes are the areas at risk of impact due to particle flight and are formed by the outer webs that support the armor. The armoring of these lateral outer webs consists, according to the above statements, of a material thickening and / or an applied bead of elastic material and / or of a direct covering by a cover rail or by a corresponding grid part. When using the protective device according to the invention, essentially all installation dimensions, assembly lines and brackets are retained as they are used for corresponding coolers without the protective device according to the invention.
Je nach der speziellen Konstruktion eines Fahrzeugs und der Anordnung eines Kühlers können an einer Kühlerfront mehr oder weniger durch einen Partikelaufprall gefährdete Bereiche vorliegen. Der Aufwand für die erfindungsgemäße Schutzeinrichtung kann ggf. vorteilhaft dadurch reduziert werden, daß nur stark gefährdete Kühlerbereiche bzw. Stegrohrbereiche durch eine erfindungsgemäße Panzerung abgedeckt werden.Depending on the special design of a vehicle and the arrangement of a radiator, there may be areas at a radiator front that are more or less at risk from particle impact. The outlay for the protective device according to the invention can advantageously be reduced, if necessary, in that only heavily endangered cooler areas or web tube areas are covered by armor according to the invention.
Anhand einer Zeichnung werden Ausführungsbeispiele der Erfindung näher erläutert.Exemplary embodiments of the invention are explained in more detail with reference to a drawing.
Es zeigen:Show it:
Fig. 1 eine perspektivische Ansicht aus einem Teilbereich eines Kühlers mit einer Schutzeinrichtung für ein Kraftfahrzeug in einer ersten Ausführungsform,1 is a perspective view of a portion of a cooler with a protective device for a motor vehicle in a first embodiment,
Fig. 2 eine entsprechende Ansicht einer zweiten Ausführungsform, undFig. 2 is a corresponding view of a second embodiment, and
Fig. 3 eine entsprechende Ansicht einer dritten Ausführungsform.Fig. 3 shows a corresponding view of a third embodiment.
In Fig. 1 ist ein Teilbereich eines Kühlers 1 für ein Kraftfahrzeug dargestellt mit horizontal, parallel verlaufenden Stegrohren 2, 3, 4, 5, 6, die durch gewellte Wärmeableitbleche 7, 8, 9, 10 verbunden sind.In Fig. 1, a portion of a radiator 1 for a motor vehicle is shown with horizontal, parallel web tubes 2, 3, 4, 5, 6, which are connected by corrugated heat dissipation plates 7, 8, 9, 10.
Die Stegrohre 2 bis 6 sind als Flachrohre mit einem langgestreckten, schmalen, rechteckigen Querschnitt mit je zwei gegenüberliegenden Schmalseiten 11, 12 und Breitseiten 13, 14 ausgebildet. In den Stegrohren 2 bis 6 verlaufen als Verbindung zwischen den jeweiligen Breitseiten 13, 14 parallele Stege 15, durch die Längskammem 16, hier sechs Längskammern 16, zur Führung eines Kühlmediums (Pfeil 20) gebildet sind.The web tubes 2 to 6 are designed as flat tubes with an elongated, narrow, rectangular cross section, each with two opposite narrow sides 11, 12 and broad sides 13, 14. In the web tubes 2 to 6, parallel webs 15 run as a connection between the respective broad sides 13, 14, through which longitudinal chambers 16, here six longitudinal chambers 16, for guiding a cooling medium (arrow 20) are formed.
Die die Stegrohre 2 bis 6 seitlich begrenzenden Außenstege 17, 18 bilden die Schmalseiten 11, 12 und weisen ersichtlich gegenüber den übrigen Wandbereichen der Stegrohre 2 bis 6 eine Materialverdickung als Panzerung auf. In der montierten Betriebsstellung des Kühlers 1 ist dieser im Vorderwagen eines Kraftfahrzeugs so angeordnet, daß er mit einem Kühlluftstrom in Richtung auf die Außenstege 18 und durch die Wellung der Wärmeableitbleche 7 bis 11 angeströmt und durchströmt wird, wie dies mit dem Pfeil 19 angedeutet ist. Mit dem Kühlluftstrom (Pfeil 19) werden Partikel, wie kleine Steinchen, Sand, etc. mitgeführt. Die Materialverdickungen als Panzerung an den Außenstegen 18, die dem Partikelflug entgegengerichtet sind, verhindern eine Beschädigung, insbesondere eine Leckage der Stegrohre 2 bis 6. Durch die Materialverdickung und Panzerung der dem Partikelflug gegenüberliegenden Außenstege 17 wird verhindert, daß bei der Montage des Kühlers durch Verdrehen der Stegrohre 2 bis 6 ein ungepanzerter Außensteg in Richtung des Partikelflugs angeordnet wird. Die Materialverdickungen tragen zusätzlich zu ihrer Schutzfunktion und Panzerung zu einer Stabilitätserhöhung der einzelnen Stegrohre 2 bis 6 und damit des gesamten Kühlers 1 bei.The outer webs 17, 18 which laterally delimit the web tubes 2 to 6 form the narrow sides 11, 12 and, as compared to the other wall areas of the web tubes 2 to 6, have a material thickening as armor. In the assembled operating position of the cooler 1, this is arranged in the front of a motor vehicle such that it is flown and flowed through with a flow of cooling air in the direction of the outer webs 18 and through the corrugation of the heat dissipation plates 7 to 11, as indicated by the arrow 19. The cooling air flow (arrow 19) carries particles, such as small stones, sand, etc. The material thickening as armor on the outer webs 18, which are directed against the particle flight, prevent damage, in particular leakage, of the web tubes 2 to 6. The material thickening and armouring of the outer webs 17 opposite the particle flight prevent the cooler from being twisted during assembly the web tubes 2 to 6, an unarmored outer web is arranged in the direction of particle flight. In addition to their protective function and armor, the material thickenings contribute to an increase in stability of the individual web tubes 2 to 6 and thus of the entire cooler 1.
In Fig. 2 ist eine alternative Ausführungsform eines Kühlers 1 dargestellt, die im wesentlichen der Ausführungsform nach Fig. 1 entspricht, so daß gleiche Teile mit gleichen Bezugszeichen angegeben sind. Es sind auch hier Stegrohre 2 bis 6 verwendet, die durch gewellte Wärmeableitbleche 7 bis 10 verbunden sind. In den Stegrohren 2 bis 6 sind durch Stege 15 Längskammern 16 gebildet, durch die im Betrieb Kühlmedium (Pfeil 20) strömt. Die Einbaurichtung des Kühlers ist in Verbindung mit der Richtung eines Partikelflugs (Pfeil 20) angegeben.FIG. 2 shows an alternative embodiment of a cooler 1, which essentially corresponds to the embodiment according to FIG. 1, so that the same parts are given the same reference numerals. Web tubes 2 to 6 are also used here, which are connected by corrugated heat dissipation plates 7 to 10. In the web tubes 2 to 6 15 longitudinal chambers 16 are formed by webs through which coolant flows during operation (arrow 20). The direction of installation of the cooler is indicated in connection with the direction of a particle flight (arrow 20).
In der Ausführungsform der Fig. 2 ist eine weitere Panzerung vorgesehen, wobei auf die dem Partikelflug (Pfeil 20) entgegengerichteten Schmalseiten 11 bzw. die Außenstege 18 jeweils eine Raupe 21 aus elastischem Material, bevorzugt aus Silicon oder Polyurethan aufgetragen ist. Diese Auftragung kann in einem automatisierten Herstellungsschritt gemeinsam mit der Herstellung der Stegrohre 2 bis 6 erfolgen. Auftreffende Partikel (Pfeil 20) können durch diese Panzerung die Stegrohre 2 bis 6 nicht beschädigen und insbesondere nicht leckschlagen.In the embodiment of FIG. 2, additional armor is provided, a bead 21 made of elastic material, preferably made of silicone or polyurethane, being applied to the narrow sides 11 which are directed against the particle flight (arrow 20) or the outer webs 18. This application can take place in an automated production step together with the production of the web tubes 2 to 6. Impacting particles (arrow 20) cannot damage the web tubes 2 to 6 and in particular do not leak through this armor.
In einer dritten Ausführungsform nach Fig. 3 ist wiederum ein Teilbereich eines Kühlers 1 entsprechend Fig. 1 gezeigt, der zusätzlich gegenüber einer Partikelflugrichtung mit einer Panzerung durch ein Gitterteil 22 abgedeckt ist. Das Gitterteil 22 besteht aus horizontal und parallel verlaufenden Abdeckschienen 23, die durch Vertikalstege 25 verbunden sind und die im montierten Zustand die Schmalseiten 11 der Stegrohre 2 bis 6 bzw. deren Außenstege 18 abdecken. Das Gitterteil 22 ist mit angeformten Klipsen 24 oder ggf. mit separaten Klipsen 26 (alternativ strichliert eingezeichnet) an den Stegrohren 2 bis 6 oder in deren Zwischenräumen befestigbar. Die Abdeckschienen 23 können auch einzeln ohne Gitterstruktur auf die jeweiligen Stegrohre 2 bis 6 aufgeklipst werden. Das Gitterteil 22 ist als Kunststoffspritzteil hergestellt. Ein so am Kühler 1 angebrachtes Gitterteil 22 stellt einen wirksamen Schutz gegen Beschädigung durch einen Partikelflug dar und verhindert insbesondere ein Leckschlagen der Stegrohre 2 bis 6. Die Schutzwirkung kann dadurch erhöht werden, daß die Abdeckbreite der Abdeckschienen 23 um 20% bis 30% größer gewählt wird als die Breite der zugeordneten Schmalseiten 11 der Stegrohre 2 bis 6.In a third embodiment according to FIG. 3, a partial area of a cooler 1 corresponding to FIG. 1 is again shown, which is additionally covered with armor by a grid part 22 in relation to a particle flight direction. The grid part 22 consists of horizontal and parallel cover rails 23 which are connected by vertical webs 25 and which, in the assembled state, the narrow sides 11 of the web tubes 2 to 6 or their outer webs 18 cover. The grid part 22 can be fastened to the web tubes 2 to 6 or in the spaces between them with molded clips 24 or possibly with separate clips 26 (alternatively shown in broken lines). The cover rails 23 can also be clipped onto the respective web tubes 2 to 6 individually without a lattice structure. The grid part 22 is produced as a plastic injection-molded part. A grille part 22 attached in this way to the cooler 1 provides effective protection against damage from particle flight and in particular prevents the tube tubes 2 to 6 from leaking. The protective effect can be increased in that the covering width of the cover rails 23 is chosen to be 20% to 30% larger is the width of the associated narrow sides 11 of the web tubes 2 to 6.
Gegebenenfalls kann es ausreichend sein, die in den Fig. 1 bis 3 dargestellten Panzerungen nur dort an einem Kühler zu verwenden, wo durch einen Partikelflug besonders gefährdete Stellen vorliegen. If necessary, it may be sufficient to use the armor shown in FIGS. 1 to 3 only on a cooler where there are particularly vulnerable places due to particle flight.

Claims

PATENTANS PRÜC H E PATENTANS PRINT
1. Schutzeinrichtung gegen auftreffende Partikel für einen Kühler (1) in einem1. Protection device against impacting particles for a cooler (1) in one
Kraftfahrzeug, wobei der Kühler (1) kühlmediumführende, beabstandete Stegrohre (2 bis 6) aufweist, dadurch gekennzeichnet, daß die im eingebauten Zustand des Kühlers (1) in Richtung auftreffender Partikel (PfeilMotor vehicle, wherein the radiator (1) has spacer tubes (2 to 6) carrying coolant, characterized in that the particles (arrow
20) gerichteten und dadurch mechanisch belasteten Stegrohrwände eine nur diese unmittelbar abdeckende und mit diesen ohne Abstand verbundene Panzerung (18; 21;20) directed and thereby mechanically loaded bridge tube walls only armor that directly covers them and is connected to them without spacing (18; 21;
23) als Partikelschlagschutz aufweisen.23) as particle impact protection.
2. Schutzeinrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die Panzerung aus einer Materialverdickung (18) im Vergleich zu anderen Stegrohrwänden besteht.2. Protection device according to claim 1, characterized in that the armor consists of a material thickening (18) in comparison to other web walls.
3. Schutzeinrichtung nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die3. Protection device according to claim 1 or claim 2, characterized in that the
Panzerung aus einer aufgetragenen Raupe (21) aus elastischem Material, bevorzugt aus Silicon oder Polyurethan besteht.Armor consists of an applied bead (21) made of elastic material, preferably made of silicone or polyurethane.
4. Schutzeinrichtung nach Anspruch 2 oder Anspruch 3, dadurch gekennzeichnet, daß auch die entgegen auftreffender Partikel weisenden Stegrohrwände (17) eine entsprechende Panzerung aufweisen.4. Protection device according to claim 2 or claim 3, characterized in that the opposing particles pointing web tube walls (17) have a corresponding armor.
5. Schutzeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die5. Protection device according to one of claims 1 to 3, characterized in that the
Panzerung aus an den mechanisch belasteten Stegrohrwänden angeordneten und diese abdeckenden Abdeckschienen (23) besteht.Armor consists of cover rails (23) which are arranged on the mechanically loaded web walls and cover them.
6. Schutzeinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Panzerung aus einem Gitterteil (22) besteht, das in den Abständen der mechanisch belasteten Stegrohrwände angeordnete und diesen unmittelbar zugeordnete Abdeckschienen (23) aufweist.6. Protection device according to claim 5, characterized in that the armor consists of a lattice part (22) which is mechanically loaded at intervals Has web tubes arranged and directly assigned cover rails (23).
7. Schutzeinrichtung nach Anspruch 5 oder Anspruch 6, dadurch gekennzeichnet, daß das7. Protection device according to claim 5 or claim 6, characterized in that the
Gitterteil (22) und/oder die Abdeckschienen (23) auf oder in den Zwischenräumen der Stegrohre (2 bis 6) mit angeformten und/oder separaten Klipsen (24; 26) befestigt sind.The grid part (22) and / or the cover rails (23) are attached to or in the spaces between the web tubes (2 to 6) with molded and / or separate clips (24; 26).
8. Schutzeinrichtung nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß die8. Protection device according to one of claims 3 to 7, characterized in that the
Breite der die mechanisch belasteten Stegrohrwände (18) abdeckenden Panzerung (21; 23) um 20% bis 30% größer als die Breite dieser Stegrohrwände (18) ist.The width of the armor (21; 23) covering the mechanically loaded web tube walls (18) is 20% to 30% larger than the width of these web tube walls (18).
9. Schutzeinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Stegrohre (2 bis 6) als Flachrohre einen langgestreckten, schmalen und rechteckigen Querschnitt mit je zwei gegenüberliegenden Schmalseiten (11 , 12) und Breitseiten (13, 14) aufweisen, daß durch mehrere parallele Stege (15) zwischen der Breitseiten (13, 14) kühlmedium- führende Längskammern (16) jeweils in den Stegrohren (2 bis 6) gebildet sind, wobei die Schmalseiten der Stegrohre (2 bis 6) durch seitliche, außen die Panzerung tragende Außenstege (18) gebildet sind, daß die Stegrohre (2 bis 6) mit einer Schmalseite in Fahrtrichtung des Kraftfahrzeugs entgegen der Partikelflugrichtung (Pfeil 19) weisen, und daß die Breitseiten (13, 14) gegenüberliegender Stegrohre (2 bis 6) durch gewellte Wärmeableitbleche (7 bis 10) verbunden sind.9. Protection device according to one of claims 1 to 8, characterized in that the web tubes (2 to 6) as flat tubes have an elongated, narrow and rectangular cross section, each with two opposite narrow sides (11, 12) and broad sides (13, 14), that are formed by several parallel webs (15) between the broad sides (13, 14) coolant-guiding longitudinal chambers (16) in each of the web tubes (2 to 6), the narrow sides of the web tubes (2 to 6) by lateral, the outside Armor-bearing outer webs (18) are formed so that the web tubes (2 to 6) have a narrow side in the direction of travel of the motor vehicle opposite the particle flight direction (arrow 19), and that the broad sides (13, 14) of opposing web tubes (2 to 6) corrugated heat dissipation plates (7 to 10) are connected.
10. Schutzeinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eine Panzerung (18; 21 ; 23) nur teilweise an durch einen Partikelaufschlag besonders gefährdeten Kühlerbereichen angebracht ist. 10. Protection device according to one of claims 1 to 8, characterized in that an armor (18; 21; 23) is only partially attached to cooler areas particularly at risk from a particle impact.
EP98925538A 1997-05-07 1998-05-06 Radiator of a motor vehicle with a protection device against projected particles Expired - Lifetime EP0980504B1 (en)

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DE19719021 1997-05-07
PCT/EP1998/002653 WO1998050751A1 (en) 1997-05-07 1998-05-06 Device for protecting the radiator of a motor vehicle against projected particles

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EP0980504B1 (en) 2002-09-18
ATE224527T1 (en) 2002-10-15
JP2001527634A (en) 2001-12-25
DE59805617D1 (en) 2002-10-24
WO1998050751A1 (en) 1998-11-12
BR9809603A (en) 2000-07-04

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