EP0184196B1 - Plastic water header tank for a cross-flow radiator for internal-combustion engines - Google Patents

Plastic water header tank for a cross-flow radiator for internal-combustion engines Download PDF

Info

Publication number
EP0184196B1
EP0184196B1 EP85115360A EP85115360A EP0184196B1 EP 0184196 B1 EP0184196 B1 EP 0184196B1 EP 85115360 A EP85115360 A EP 85115360A EP 85115360 A EP85115360 A EP 85115360A EP 0184196 B1 EP0184196 B1 EP 0184196B1
Authority
EP
European Patent Office
Prior art keywords
water tank
chamber
breather pipe
emptying
tank 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
Application number
EP85115360A
Other languages
German (de)
French (fr)
Other versions
EP0184196A1 (en
Inventor
Axel Temmesfeld
Karl Tauber
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0184196A1 publication Critical patent/EP0184196A1/en
Application granted granted Critical
Publication of EP0184196B1 publication Critical patent/EP0184196B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0231—Header boxes having an expansion chamber

Definitions

  • Water box made of plastic for a cross-flow cooler for internal combustion engines.
  • the invention relates to a water box made of plastic for a cross-flow cooler for internal combustion engines of a type with the features according to the preamble of claim 1.
  • the vent line requires a separate component and its fastening an additional manufacturing effort when it opens into the compensation chamber.
  • the separate emptying of the water tank and the compensation chamber also requires considerable maintenance for the separation of the two line connections or, if appropriate, additional construction for a drain plug.
  • the ventilation line connects the chamber to a high point of the cooler in the water box opposite the confluence of the flow line from the machine and the cooler.
  • the chamber In its bottom area, the chamber has an open connection to the water box which is in one piece with it, from which the return line from the cooler to the machine opens out of the water box.
  • a cooler of a similar type in which a ventilation line from a radiator high point for a low-lying U-loop serving as a hydraulic lock is connected to a high point of the chamber and a connection to the lowest point of the ventilation line a common drain valve for the vent line, for the chamber and via a connection opening to the chamber for the water tank is arranged.
  • This publication does not contain any suggestions for production-oriented training as plastic components.
  • the object of the invention is to develop a water tank of the type according to the features of the preamble of claim 1 so that the combination with a return mixing thermostat is possible without functional disadvantages at low manufacturing costs.
  • the warm-up time should be short, the one-piece design of the various cooler components should be favored and the cooling circuit should be easy to empty.
  • the invention provides the features in the characterizing part of patent claim 1.
  • the venting bypass flow in the water box flows a short way out of the supply line into the venting line, the venting line is directly molded onto the water box and the chamber when it is formed, with low manufacturing costs, and the drain opening in the lower molding opening accommodates a drain valve, that enables easy simultaneous emptying of the cooler and the chamber as well as the ventilation line itself.
  • the features of claim 3 provide a development of the invention with a control line connected to the ventilation line to the pressure control valves in the filler cap without additional construction work for separate parts.
  • the control line acts as an additional ventilation opening and thereby accelerates the filling if the opening of the ventilation line into the chamber has a restricted cross-section.
  • the features of claim 4 enable a particularly favorable arrangement of the ventilation and / or control lines for the plastic molding, which avoids material accumulation.
  • the features of claim 5 contain a further development of claim 4, which favors the one-piece connection of the water tank and the chamber.
  • the features of claim 6 additionally favor a shaping of the ventilation and / or control lines and the one-piece molding of the filler neck on the chamber, and the formation of the upper part of the chamber for monitoring the coolant level from transparent or translucent plastic according to claim 7 is possible without to affect the formation of the water box from an opaque material with high strength and thus low wall thickness and light weight.
  • the independent, approximately circular and therefore deformation-proof design possibility of the cross section of the upper part of the chamber favors the use of a transparent or translucent plastic with lower strength but still low wall thickness and low weight.
  • the arrangement of the mouth of the ventilation line according to the features of claim 8 favors the shaping of this mouth by means of a mold slide provided in a molded part for the chamber near the parting plane and movable transversely to the molding direction.
  • the features of claim 10 include a spatially compact arrangement of the chamber to the water tank with ventilation and control lines running between them.
  • a liquid-cooled internal combustion engine 1 is connected to a cross-flow cooler 2 directly through a flow line 3 and via a thermostat 4 and a coolant pump 5 through a return line 6.
  • a short-circuit line 7 connects the flow line 3 directly to the thermostat 4.
  • the cooler 2 has a flow and return plastic water tank 8 and 8 '.
  • a lower part 9 of a storage, ventilation and compensation chamber 10 is integrally formed on the flow water tank 8.
  • an upper part 12 of the chamber 10 is fastened to the lower part 9 and thus to the water tank 8.
  • the upper part 12 can consist of a transparent plastic due to its pressure-resistant, approximately circular cross-section, so that the coolant level 13 can always be observed from the outside.
  • the water tank 8 and the chamber 10 are connected to a vent line 14, which opens out from a high point 8 "of the water tank 8 and ends in an opening 15 in the chamber 10.
  • the opening 15 has a restricted cross-section and can optionally start from the chamber , starting from a molding opening 15 'closed to the water tank 8 and lying in its molding direction or in the parting plane 11 between the two chamber parts 9 and 12, for example connected by gluing or welding the filler neck 17 of the chamber 10 opens into a control chamber of the filler cap 18.
  • the latter contains pressure control valves in the usual way, which connect via a drain line 19 to the atmosphere when the maximum and minimum pressure values in the water tank 8 or in the chamber 10 are exceeded or fallen below
  • the vent line 14 and the Steuerleitu ng 16 are integrally formed on ribs 20, the water tank 8 and the lower part 9 and the upper part 12 of the chamber 10.
  • the ribs 20 are thickened tubularly at a distance from the walls of the water tank 8 and the chamber 10 for the lines. This avoids material accumulations that could adversely affect the shape of the plastic parts.
  • the vent line 14 continues downwards to a shaping and emptying opening 21 which contains a multi-way emptying valve 22 and to which an emptying connection piece 23 for integrating an emptying hose 24 is formed.
  • a drain connection 25, 26 from the water tank 8 and from the chamber 10 also opens into the drain valve 22.
  • These drain connections 25 and 26 are either formed continuously towards the water tank 8 in the direction in which it is formed, or are formed separately towards the water tank or the chamber 10.
  • a filling and bypass return line 28 to the coolant pump 5 connects to a molded hose connector 27.
  • an electrical float switch 29 is installed, which indicates an excessive drop in the coolant level 13 via a control lamp.
  • the vent line 14 contains in the area of the parting plane 11 of the chamber 10 a connecting part 14 'to which the control line 16 connects laterally offset in the parting plane 11 to the main part of the vent line 14.
  • a horizontal end section of the control line 16 opening into the filler neck 17 is formed by an outer opening 16 ′ which is closed by a stopper.
  • vent line 14 and the control line 16 are protected and arranged in a space-saving manner at a close distance between the water tank 8 and the chamber 10.
  • thin mold slides which are common as parts of plastic shaping tools that are movable in the direction of their longitudinal axis, they can be designed to be inexpensive to produce by means of a shaped metal tube without a bevel.
  • the embodiment according to FIG. 2 contains a chamber 10 'which is integrally molded onto the water tank 8 and which has a smaller volume and which can be shaped into the filler neck 17'.
  • a chamber 10 ' which is integrally molded onto the water tank 8 and which has a smaller volume and which can be shaped into the filler neck 17'.
  • an atmospheric reservoir 19 ' is connected to the drain line 19, which at the same time acts as a water reservoir for the complete ventilation of the cooling circuit including the chamber 10' works.
  • control line 16 branches off from the ventilation line 14 directly in the region of the high point 8 ′′ of the water box 8.
  • the opening 15 of the control line 14 into the chamber 10 ′ branches off directly from the main part of the ventilation line 14 and is connected to the water box 8 via a
  • the water tank 8 and the chamber 10 ' are connected in one piece by a rib 20' which contains the vent line 14 in a tubular thickening approximately centrally between the water tank and the chamber.
  • both designs of a cross-flow cooler according to the invention enable rational production with a few plastic parts which can be shaped inexpensively while ensuring an advantageous cooling system function with regard to filling, emptying, venting and supply pressure control, in particular with a separate return connection on a supply pipe -Water tank arranged compensation chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Description

Aus Kunststoff hergestellter Wasserkasten für einen Querstrom-Kühler für Brennkraftmaschinen.Water box made of plastic for a cross-flow cooler for internal combustion engines.

Die Erfindung betrifft einen aus Kunststoff hergestellten Wasserkasten für einen Querstrom- Kühler für Brennkraftmaschinen einer Bauart mit den Merkmalen nach dem Oberbegriff des Patentanspruches 1.The invention relates to a water box made of plastic for a cross-flow cooler for internal combustion engines of a type with the features according to the preamble of claim 1.

Bei einem bekannten Wasserkasten dieser Bauart gemäß DE-A-3330710 erfordert die Entlüftungsleitung bei tieferliegender Einmündung in die Ausgleichskammer ein gesondertes Bauteil und deren Befestigung einen zusätzlichen Fertigungsaufwand. Auch die getrennte Entleerung des Wasserkastens und der Ausgleichskammer erfordert einen erheblichen Wartungsaufwand für das Abtrennen beider Leitungsanschlüsse oder gegebenenfalls einen zusätzlichen Bauaufwand für einen Ablaufverschluß.In a known water tank of this type according to DE-A-3330710, the vent line requires a separate component and its fastening an additional manufacturing effort when it opens into the compensation chamber. The separate emptying of the water tank and the compensation chamber also requires considerable maintenance for the separation of the two line connections or, if appropriate, additional construction for a drain plug.

Bei einem bekannten Kühler ähnlicher Bauart gemäß DE-A-3 341 390 verbindet die Entlüftungsleitung die Kammer mit einem Hochpunkt des Kühlers in dem der Einmündung der Vorlaufleitung von der Maschine in den Kühler gegenüberliegenden Wasserkasten. Die Kammer weist in ihrem Bodenbereich zum mit ihr einteiligen Wasserkasten eine offene Verbindung zu dessen Bereich auf, aus dem die Rücklaufleitung vom Kühler zur Maschine aus dem Wasserkasten ausmündet. Diese Ausbildung ist für einen Kühlkreis für flüssigkeitsgekühlte Brennkraftmaschinen mit einem Rücklauf-Mischthermostat wenig geeignet, weil dabei der Entlüftungs-Nebenstrom bis zum Öffnen des Kühlerkreises außer Funktion bleibt bzw. der Entlüftungs-Nebenstrom durch den Einbezug des Kühlers die Anwärmzeit der Maschine verlängert. Aus der DE-A-2 044 033 ist ferner ein Kühler ähnlicher Bauart bekannt, bei dem eine Entlüftungsleitung von einem Kühlerhochpunkt für eine tiefgelegene als hydraulische Sperre dienende U-Schleife mit einem Hochpunkt der Kammer verbunden ist und am tiefsten Punkt der Entlüftungsleitung ein Anschluß zu einem gemeinsamen Entleerungsventil für die Entlüftungsleitung, für die Kammer und über eine Verbindungsöffnung zur Kammer für den Wasserkasten angeordnet ist. Für eine fertigungsgerechte Ausbildung als Kunstsoffbauteile enthält diese Druckschrift keine Anregungen.In a known cooler of a similar design according to DE-A-3 341 390, the ventilation line connects the chamber to a high point of the cooler in the water box opposite the confluence of the flow line from the machine and the cooler. In its bottom area, the chamber has an open connection to the water box which is in one piece with it, from which the return line from the cooler to the machine opens out of the water box. This training is not very suitable for a cooling circuit for liquid-cooled internal combustion engines with a return mixing thermostat, because the ventilation bypass flow remains inoperative until the cooling circuit is opened or the ventilation bypass flow extends the warm-up time of the machine by including the cooler. From DE-A-2 044 033 a cooler of a similar type is also known, in which a ventilation line from a radiator high point for a low-lying U-loop serving as a hydraulic lock is connected to a high point of the chamber and a connection to the lowest point of the ventilation line a common drain valve for the vent line, for the chamber and via a connection opening to the chamber for the water tank is arranged. This publication does not contain any suggestions for production-oriented training as plastic components.

Aufgabe der Erfindung ist es, einen Wasserkasten der Bauart nach den Merkmalen des Oberbegriffes des Patentanspruches 1 so weiterzubilden, daß bei geringen Herstellungskosten die Kombination mit einem Rücklauf-Mischthermostat ohne funktionelle Nachteile ermöglicht wird. Dabei soll die Anwärmzeit kurz sein, die einstückige Ausformung der verschiedenen Kühlerbauteile begünstigt werden und eine einfache Entleerung des Kühlkreises möglich sein. Zur Lösung dieser Aufgabe sieht die Erfindung die Merkmale im Kennzeichen des Patentanspruches 1 vor. Dadurch mündet für eine kurze Anwärmzeit der Entlüftungs-Nebenstrom im Wasserkasten auf kurzem Weg aus der Vorlaufleitung in die Entlüftungsleitung, ist die Entlüftungsleitung dem Wasserkasten und der Kammer bei deren Ausformung mit geringen Herstellungskosten unmittelbar mit angeformt und nimmt die untere Ausformöffnung der Entlüftungsleitung ein Entleerungsventil auf, das eine einfache gleichzeitige Entleerung des Kühlers und der Kammer sowie der Entlüftungsleitung selbst ermöglicht.The object of the invention is to develop a water tank of the type according to the features of the preamble of claim 1 so that the combination with a return mixing thermostat is possible without functional disadvantages at low manufacturing costs. The warm-up time should be short, the one-piece design of the various cooler components should be favored and the cooling circuit should be easy to empty. To achieve this object, the invention provides the features in the characterizing part of patent claim 1. As a result, for a short warm-up time, the venting bypass flow in the water box flows a short way out of the supply line into the venting line, the venting line is directly molded onto the water box and the chamber when it is formed, with low manufacturing costs, and the drain opening in the lower molding opening accommodates a drain valve, that enables easy simultaneous emptying of the cooler and the chamber as well as the ventilation line itself.

Nach den Merkmalen des Anspruches 2 wird eine günstige Ausformung der Einmündung der Entlüftungsleitung in die Kammer erreicht, so daß sich besondere Verschlußmaßnahmen für Ausformöffnungen erübrigen.According to the features of claim 2, a favorable shape of the mouth of the vent line in the chamber is achieved, so that special closure measures for the form openings are unnecessary.

Die Merkmale des Anspruches 3 sehen eine Weiterbildung der Erfindung mit einer an die Entlüftungsleitung anschließenden Steuerleitung zu den Drucksteuerventilen im Befülldeckel ohne zusätzlichen Bauaufwand für gesonderte Teile vor. Beim Befüllen und dabei offener Mündung der Steuerleitung wirkt die Steuerleitung als zusätzliche Entlüftungsöffnung und beschleunigt dadurch das Befüllen, wenn die Einmündung der Entlüftungsleitung in die Kammer einen gedrosselten Querschnitt aufweist.The features of claim 3 provide a development of the invention with a control line connected to the ventilation line to the pressure control valves in the filler cap without additional construction work for separate parts. When the control line is filled and the mouth of the control line is open, the control line acts as an additional ventilation opening and thereby accelerates the filling if the opening of the ventilation line into the chamber has a restricted cross-section.

Die Merkmale des Anspruches 4 ermöglichen eine für die Kunststoffausformung besonders günstige Anordnung der Entlüftungs- und/oder Steuerleitungen, die Materialanhäufungen vermeidet. t' Die Merkmale des Anspruches 5 enthalten eine Weiterbildung des Anspruches 4, die die einstückige Verbindung von Wasserkasten und Kammer begünstigt.The features of claim 4 enable a particularly favorable arrangement of the ventilation and / or control lines for the plastic molding, which avoids material accumulation. The features of claim 5 contain a further development of claim 4, which favors the one-piece connection of the water tank and the chamber.

Durch die Merkmale des Anspruches 6 wird eine Ausformung der Entlüftungs- und/oder Steuerleitungen sowie das einstückige Anformen des Füllstutzens an der Kammer zusätzlich begünstigt und die Ausbildung des Oberteiles der Kammer für die Überwachung des Kühlmittelniveaus aus durchsichtigem oder durchscheinendem Kunststoff gemäß Anspruch 7 ermöglicht, ohne die Ausbildung des Wasserkastens aus einem undurchsichtigen Material mit hoher Festigkeit und damit geringer Wandstärke und geringem Gewicht zu beeinträchtigen. Dabei begünstigt die unabhängige, etwa kreisförmige und dadurch verformungssichere Gestaltungsmöglichkeit des Querschnittes des Oberteiles der Kammer die Verwendung eines durchsichtigen oder durchscheinenden Kunststoffes mit geringerer Festigkeit bei dennoch geringer Wandstärke und geringem Gewicht.The features of claim 6 additionally favor a shaping of the ventilation and / or control lines and the one-piece molding of the filler neck on the chamber, and the formation of the upper part of the chamber for monitoring the coolant level from transparent or translucent plastic according to claim 7 is possible without to affect the formation of the water box from an opaque material with high strength and thus low wall thickness and light weight. The independent, approximately circular and therefore deformation-proof design possibility of the cross section of the upper part of the chamber favors the use of a transparent or translucent plastic with lower strength but still low wall thickness and low weight.

Die Anordnung der Einmündung der Entlüftungsleitung nach den Merkmalen des Anspruches 8 begünstigt die Ausformung dieser Einmündung mittels eines in einem Formteil für die Kammer nahe der Trennebene vorgesehenen, quer zur Ausformrichtung beweglichen Formschiebers.The arrangement of the mouth of the ventilation line according to the features of claim 8 favors the shaping of this mouth by means of a mold slide provided in a molded part for the chamber near the parting plane and movable transversely to the molding direction.

Die Merkmale des Anspruches 9 begünstigen die Ausformung sowohl des Anschlusses der Steuerleitung an die Entlüftungsleitung im Unterteil der Kammer als auch die Anordnung der Steuerleitung parallel zur Entlüftungsleitung im Bereich des Oberteils der Kammer.Favor the features of claim 9 the formation of both the connection of the control line to the ventilation line in the lower part of the chamber and the arrangement of the control line parallel to the ventilation line in the area of the upper part of the chamber.

Die Merkmale des Anspruches 10 beinhalten eine räumlich kompakte Anordnung der Kammer zum Wasserkasten mit geschützt dazwischen verlaufenden Entlüftungs- und Steuerleitungen.The features of claim 10 include a spatially compact arrangement of the chamber to the water tank with ventilation and control lines running between them.

In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Es zeigen :

  • Fig. 1 einen Kühlkreis für eine flüssigkeitsgekühlte Brennkraftmaschine mit einem erfindungsgemäßen Querstromkühler in schematischer Darstellung,
  • Fig. 2 einen Teilausschnitt der Darstellung nach Fig. 1 mit abgewandelter Ausbildung der einem Wasserkasten des Querstromkühlers angeformten Entlüftungskammer,
  • Fig. 3 eine Teil-Seitenansicht des Wasserkastens mit Vorrats-, Entlüftungs- und Ausgleichs- Kammer zum Querstromkühler nach Fig. 1,
  • Fig. 4 eine Draufsicht zur Fig. 3,
  • Fig. 5 eine weitere Seitenansicht gemäß Pfeil V in Fig. 3 ohne Oberteil der Kammer,
  • Fig. 6 den Oberteil der Kammer in Richtung des Pfeiles VI in Fig. 3,
  • Fig. 7 einen Teilschnitt nach der Linie VII-VII in Fig. 3 und
  • Fig. 8 einen Teilschnitt nach der Linie VIII-VIII in Fig. 3.
Exemplary embodiments of the invention are shown in the drawing. Show it :
  • 1 shows a cooling circuit for a liquid-cooled internal combustion engine with a cross-flow cooler according to the invention in a schematic representation,
  • 2 shows a partial section of the illustration according to FIG. 1 with a modified design of the ventilation chamber molded onto a water tank of the cross-flow cooler,
  • 3 is a partial side view of the water tank with storage, ventilation and compensation chamber for the cross-flow cooler according to FIG. 1,
  • 4 is a plan view of FIG. 3,
  • 5 shows a further side view according to arrow V in FIG. 3 without the upper part of the chamber,
  • 6 shows the upper part of the chamber in the direction of arrow VI in FIG. 3,
  • Fig. 7 is a partial section along the line VII-VII in Fig. 3 and
  • 8 is a partial section along the line VIII-VIII in Fig. 3rd

Eine flüssigkeitsgekühlte Brennkraftmaschine 1 ist mit einem Querstromkühler 2 unmittelbar durch eine Vorlaufleitung 3 und über ein Thermostat 4 und eine Kühlmittelpumpe 5 durch eine Rücklaufleitung 6 verbunden. Eine Kurzschlußleitung 7 verbindet die Vorlaufleitung 3 unmittelbar mit dem Thermostat 4. Der Kühler 2 weist je einen Vorlauf- und Rücklauf-Kunststoff-Wasserkasten 8 und 8' auf. Nach den Figuren 1 und 3 bis 8 ist dem Vorlauf-Wasserkasten 8 ein Unterteil 9 einer Vorrats-, Entlüftungs- und Ausgleichs-Kammer 10 einstückig angeformt. Im Bereich einer Trennebene 11 ist ein Oberteil 12 der Kammer 10 am Unterteil 9 und damit am Wasserkasten 8 befestigt. Während der Wasserkasten 8 mit dem Unterteil 9 aus einem undurchsichtigen faserverstärkten Kunststoff besteht, kann das Oberteil 12 aufgrund seines druckfesten etwa kreisförmigen Querschnitts aus einem transparenten Kunststoff bestehen, so daß das Kühlmittel-Niveau 13 von außen stets beobachtet werden kann. Der Wasserkasten 8 und die Kammer 10 sind mit einer Entlüftungsleitung 14 verbunden, die aus einem Hochpunkt 8" des Wasserkastens 8 ausmündet und in einer Einmündung 15 in die Kammer 10 endet. Die Einmündung 15 weist einen gedrosselten Querschnitt auf und ist wahlweise von der Kammer ausgehend, von einer zum Wasserkasten 8 hin verschlossenen und in dessen Ausformrichtung liegenden Ausformöffnung 15' ausgehend oder in der Trennebene 11 zwischen den beiden beispielsweise durch Kleben oder Schweißen verbundenen Kammerteilen 9 und 12 ausgeformt. An die Entlüftungsleitung 14 schließt sich eine Steuerleitung 16 an, die durch den Einfüllstutzen 17 der Kammer 10 in einen Steuerraum des Befülldeckels 18 mündet. Letzterer enthält in üblicher Weise Drucksteuerventile, die über eine Ablaufleitung 19 eine Verbindung zur Atmosphäre bei Über- bzw. Unterschreiten vorbestimmter Höchst- und Niedrigstdruckwerte im Wasserkasten 8 bzw. in der Kammer 10 steuern. Die Entlüftungsleitung 14 und die Steuerleitung 16 sind über Rippen 20 dem Wasserkasten 8 sowie dem Unterteil 9 und dem Oberteil 12 der Kammer 10 einstückig angeformt. Die Rippen 20 sind dabei im Abstand von den Wandungen des Wasserkastens 8 und der Kammer 10 für die Leitungen rohrförmig verdickt. Dadurch werden Materialanhäufungen vermieden, die die Ausformung der Kunststoffteile nachteilig beeinflussen könnten.A liquid-cooled internal combustion engine 1 is connected to a cross-flow cooler 2 directly through a flow line 3 and via a thermostat 4 and a coolant pump 5 through a return line 6. A short-circuit line 7 connects the flow line 3 directly to the thermostat 4. The cooler 2 has a flow and return plastic water tank 8 and 8 '. According to FIGS. 1 and 3 to 8, a lower part 9 of a storage, ventilation and compensation chamber 10 is integrally formed on the flow water tank 8. In the area of a parting plane 11, an upper part 12 of the chamber 10 is fastened to the lower part 9 and thus to the water tank 8. While the water box 8 with the lower part 9 consists of an opaque fiber-reinforced plastic, the upper part 12 can consist of a transparent plastic due to its pressure-resistant, approximately circular cross-section, so that the coolant level 13 can always be observed from the outside. The water tank 8 and the chamber 10 are connected to a vent line 14, which opens out from a high point 8 "of the water tank 8 and ends in an opening 15 in the chamber 10. The opening 15 has a restricted cross-section and can optionally start from the chamber , starting from a molding opening 15 'closed to the water tank 8 and lying in its molding direction or in the parting plane 11 between the two chamber parts 9 and 12, for example connected by gluing or welding the filler neck 17 of the chamber 10 opens into a control chamber of the filler cap 18. The latter contains pressure control valves in the usual way, which connect via a drain line 19 to the atmosphere when the maximum and minimum pressure values in the water tank 8 or in the chamber 10 are exceeded or fallen below The vent line 14 and the Steuerleitu ng 16 are integrally formed on ribs 20, the water tank 8 and the lower part 9 and the upper part 12 of the chamber 10. The ribs 20 are thickened tubularly at a distance from the walls of the water tank 8 and the chamber 10 for the lines. This avoids material accumulations that could adversely affect the shape of the plastic parts.

Die Entlüftungsleitung 14 setzt sich nach unten bis zu einer Ausform- und Entleerungsöffnung 21 fort, die ein Mehrwege-Entleerungsventil 22 enthält und an die ein Entleerungsstutzen 23 zum Anschluß eines Entleerungsschlauches 24 angeformt ist. In das Entleerungsventil 22 mündet ferner je eine Entleerungsverbindung 25, 26 aus dem Wasserkasten 8 und aus der Kammer 10. Diese Entleerungsverbindungen 25 und 26 sind entweder durchgehend zum Wasserkasten 8 hin in dessen Ausformrichtung ausgeformt oder getrennt zum Wasserkasten bzw. zur Kammer 10 hin ausgeformt. Am Unterteil 9 der Kammer 10 schließt an einem angeformten Schlauchstutzen 27 eine Befüll- und Nebenstrom-Rücklaufleitung 28 zur Kühlmittelpumpe 5 an. Im Oberteil 12 der Kammer 10 ist ein elektrischer Schwimmerschalter 29 eingebaut, der ein zu starkes Absinken des Kühlmittel-Niveaus 13 über eine Kontrolleuchte anzeigt.The vent line 14 continues downwards to a shaping and emptying opening 21 which contains a multi-way emptying valve 22 and to which an emptying connection piece 23 for integrating an emptying hose 24 is formed. A drain connection 25, 26 from the water tank 8 and from the chamber 10 also opens into the drain valve 22. These drain connections 25 and 26 are either formed continuously towards the water tank 8 in the direction in which it is formed, or are formed separately towards the water tank or the chamber 10. On the lower part 9 of the chamber 10, a filling and bypass return line 28 to the coolant pump 5 connects to a molded hose connector 27. In the upper part 12 of the chamber 10, an electrical float switch 29 is installed, which indicates an excessive drop in the coolant level 13 via a control lamp.

Die Entlüftungsleitung 14 enthält im Bereich der Trennebene 11 der Kammer 10 ein Verbindungsteil 14', an das in der Trennebene 11 zum Hauptteil der Entlüftungsleitung 14 seitlich versetzt die Steuerleitung 16 anschließt. Ein in dem Füllstutzen 17 mündender horizontaler Endabschnitt der Steuerleitung 16 ist durch eine äußere Öffnung 16' ausgeformt, die durch einen Stopfen verschlossen ist.The vent line 14 contains in the area of the parting plane 11 of the chamber 10 a connecting part 14 'to which the control line 16 connects laterally offset in the parting plane 11 to the main part of the vent line 14. A horizontal end section of the control line 16 opening into the filler neck 17 is formed by an outer opening 16 ′ which is closed by a stopper.

Wie insbesondere aus den Figuren 3 und 4 ersichtlich ist, sind die Entlüftungsleitung 14 und die Steuerleitung 16 geschützt und platzsparend in einem engen Abstand zwischen dem Wasserkasten 8 und der Kammer 10 angeordnet. Sie können anstelle langer dünner Formschieber, die als in Richtung ihrer Längsachse bewegliche Teile von Kunststoff-Ausformwerkzeugen üblich sind, mittels ein geformter Metallrohre ohne Formschräge fertigungsgünstig ausgebildet werden.As can be seen in particular from FIGS. 3 and 4, the vent line 14 and the control line 16 are protected and arranged in a space-saving manner at a close distance between the water tank 8 and the chamber 10. Instead of long, thin mold slides, which are common as parts of plastic shaping tools that are movable in the direction of their longitudinal axis, they can be designed to be inexpensive to produce by means of a shaped metal tube without a bevel.

Die Ausbildung nach Fig. 2 enthält eine dem Wasserkasten 8 einteilig angeformte Kammer 10' mit geringerem Volumen und zum Einfüllstutzen 17' ausformbarer Ausbildung. Für den Kühlmittelvorrat ist an die Ablaufleitung 19 ein atmosphärischer Vorratsbehälter 19' angeschlossen, der zugleich als Wasservorlage zur völligen Entlüftung des Kühlkreises einschließlich der Kammer 10' wirkt.The embodiment according to FIG. 2 contains a chamber 10 'which is integrally molded onto the water tank 8 and which has a smaller volume and which can be shaped into the filler neck 17'. For the coolant supply, an atmospheric reservoir 19 'is connected to the drain line 19, which at the same time acts as a water reservoir for the complete ventilation of the cooling circuit including the chamber 10' works.

Die Steuerleitung 16 zweigt bei dieser Ausbildung unmittelbar im Bereich des Hochpunktes 8" des Wasserkastens 8 von der Entlüftungsleitung 14 ab. Die Einmündung 15 der Steuerleitung 14 in die Kammer 10' zweigt vom Hauptteil der Entlüftungsleitung 14 unmittelbar ab und ist zum Wasserkasten 8 hin über eine Ausformöffnung 15' ausgeformt, die durch einen Stopfen verschlossen ist. Der Wasserkasten 8 und die Kammer 10' sind durch eine Rippe 20' einstückig verbunden, die etwa mittig zwischen Wasserkasten und Kammer in einer rohrförmigen Verdickung die Entlüftungsleitung 14 enthält.In this embodiment, the control line 16 branches off from the ventilation line 14 directly in the region of the high point 8 ″ of the water box 8. The opening 15 of the control line 14 into the chamber 10 ′ branches off directly from the main part of the ventilation line 14 and is connected to the water box 8 via a The water tank 8 and the chamber 10 'are connected in one piece by a rib 20' which contains the vent line 14 in a tubular thickening approximately centrally between the water tank and the chamber.

Beide erfindungsgemäßen Ausbildungen eines Querstrom-Kühlers ermöglichen aufgrund der Merkmale nach den Patentansprüchen eine rationelle Fertigung mit wenigen günstig ausformbaren Kunststoffteilen unter Gewährleistung einer vorteilhaften Kühlsystem-Funktion bezüglich Befüllen, Entleeren, Entlüften und Vorlauf-Überdrucksteuerung, insbesondere bei getrenntem Rücklauf-Anschluß einer an einem Vorlauf-Wasserkasten angeordneten Ausgleichs-Kammer.Due to the features according to the patent claims, both designs of a cross-flow cooler according to the invention enable rational production with a few plastic parts which can be shaped inexpensively while ensuring an advantageous cooling system function with regard to filling, emptying, venting and supply pressure control, in particular with a separate return connection on a supply pipe -Water tank arranged compensation chamber.

Claims (10)

1. A water tank made of synthetic plastics material for a cross-flow radiator for internal combustion engines,
comprising an adjacently-arranged compensating chamber (10) with a filler pipe (17) and a filler cap (18) containing pressure-control valves,
with a breather pipe (14) which connects a high point (8") of the water tank (8) to a lower entry (15) into the compensating chamber (10), the tank being provided with a feed connection (3),
with a connection (27) formed on the compensating chamber (10) in the bottom region thereof for a secondary return flow conduit (28), separate from the radiator return conduit (6), to the suction side of a coolant pump (5),
characterised in that
the breather pipe (14) is made in one piece and has a generally vertically extending main part which leads into a lower outlet and emptying opening (21) in the region of which integrally- formed emptying connections (25 and 26) open respectively out of the water tank (8) and the compensating chamber (10), and
that the outlet and emptying opening (21) contains an emptying valve (22) which connects the breather pipe (14) and the emptying connections (25 and 26), as well as an emptying outlet (emptying pipe 23), with one another in the open position and seals them from one another in the closed position.
2. A water tank according to Claim 1, characterised in that the entry (15) of the breather pipe (14) into the chamber (10) is constituted - starting from the chamber (10) - by a mould slider of the synthetic plastics shaping tool which is movable in the direction of its longitudinal axis and/or in a plane (11) of separation between two chamber parts (9 and 12) connected by bonding or welding.
3. A water tank according to Claim 1, characterised in that the breather pipe (14) is connected, through a control conduit (16) formed integrally on the water tank (8) and/or on the chamber (10), with an entry into the filler pipe (17), which entry is connected to a control chamber of the filler cap (18).
4. A water tank according to any one of claims 1 to 3, characterised in that the breather pipe (14) and/or the control conduit (16) are arranged essentially in ribs (20) which are formed externally on the water tank (8) and/or the chamber (10) and are tubularly thickened at a distance from the latter.
5. A water tank according to Claim 4, characterised in that water tank (8) and the chamber (10) are integrally connected by a rib which contains the breather pipe (14) and/or the control conduit (16) at a distance from the water tank and the chamber.
6. A water tank according to any one of claims 1 to 5, characterised in that the chamber (10) comprises a lower part (9) integrally formed on the water tank (8) and an upper part (12) secured to the lower part.
7. A water tank according to Claim 6. characterised in that the upper part (12) is made of a synthetic plastics material which is transparent or translucent at least in the region of the coolant level (13).
8. A water tank according to Claim 6, characterised in that the entry (15) of the breather pipe (14) into the chamber (10) is arranged in the region on both sides of a plane (11) of separation between upper and lower parts (9 and 12) of the chamber (10).
9. A water tank according to Claim 3, characterised in that, in the region of the plane (11) of separation between upper and lower parts (9 and 12) of the chamber (10), a connection part (14') of the breather pipe (14) is formed on the lower part (9), which connection part opens into an opening in the plane (11) of separation which is laterally offset with respect to the main part of the breather pipe (14) and which continues - in the control conduit (16) adjoining the opening - as being formed on the upper part (12) towards the plane (11) of separation.
10. A water tank according to Claim 9, characterised in that the parts of the breather pipe (14) and/or control conduit (16) formed by way of the plane (11) of separation on the one hand to the water tank (8) and on the other hand to the upper part (12) are arranged with free spacing between the water tank (8) and the chamber (10), and are connected with these by means of respective ribs (20) which are arranged, with spacing between them, approximately parallel to one another and also one behind the other and overlapping one another when seen in the direction of cooling air through-flow.
EP85115360A 1984-12-05 1985-12-04 Plastic water header tank for a cross-flow radiator for internal-combustion engines Expired EP0184196B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3444273A DE3444273C1 (en) 1984-12-05 1984-12-05 Water box made of plastic for a cross-flow cooler for internal combustion engines
DE3444273 1984-12-05

Publications (2)

Publication Number Publication Date
EP0184196A1 EP0184196A1 (en) 1986-06-11
EP0184196B1 true EP0184196B1 (en) 1987-11-11

Family

ID=6251915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115360A Expired EP0184196B1 (en) 1984-12-05 1985-12-04 Plastic water header tank for a cross-flow radiator for internal-combustion engines

Country Status (5)

Country Link
US (1) US4763724A (en)
EP (1) EP0184196B1 (en)
DE (2) DE3444273C1 (en)
ES (1) ES8701299A1 (en)
WO (1) WO1986003554A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640364A1 (en) * 1988-12-08 1990-06-15 Valeo Water tank and expansion vessel device for heat exchanger, in particular for cooling radiator
DE4332101A1 (en) * 1993-09-22 1995-03-23 Bayerische Motoren Werke Ag Cooling device for a liquid-cooled internal combustion engine of a motor vehicle
US5572958A (en) * 1994-06-24 1996-11-12 Bayerische Motoren Werke Ag Cooling arrangement for a liquid-cooled motor vehicle internal-combustion engine

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3912734A1 (en) * 1989-04-19 1990-10-25 Kloeckner Humboldt Deutz Ag COOLING SYSTEM
DE3920898C1 (en) * 1989-06-26 1990-07-05 Bayerische Motoren Werke Ag, 8000 Muenchen, De Compensating tank - has top part and bottom part entered by venting line from which control line branches off
DE3924550A1 (en) * 1989-07-25 1991-01-31 Daimler Benz Ag HEAT EXCHANGER, ESPECIALLY HEAT EXCHANGER IN THE ENGINE COOLING CIRCUIT OF A MOTOR VEHICLE
US5097894A (en) * 1991-07-05 1992-03-24 Roland Cassia Vehicular flushing and draining apparatus and method
US5267606A (en) * 1991-07-05 1993-12-07 Roland Cassia Vehicular flushing and draining apparatus and method
DE4225253C2 (en) * 1992-08-03 1996-12-05 Behr Gmbh & Co Arrangement of a plastic water tank and an expansion tank made of plastic
US5285843A (en) * 1992-12-08 1994-02-15 Dierbeck Robert F Mounting assembly for modular heat exchanger
DE4315729C2 (en) * 1993-05-11 2000-08-31 Bayerische Motoren Werke Ag Cross flow cooler with integrated expansion tank
DE4320343C2 (en) * 1993-06-19 2002-11-21 Behr Gmbh & Co Heat exchangers, in particular cross-flow coolers for internal combustion engines
DE4341927A1 (en) * 1993-12-09 1995-06-14 Bayerische Motoren Werke Ag Partially flooded evaporative cooling system
US5746270A (en) * 1996-01-30 1998-05-05 Brunswick Corporation Heat exchanger for marine engine cooling system
US5649587A (en) * 1996-02-23 1997-07-22 Mccord Winn Textron, Inc. Fan shroud and receptacle arrangement
JP3293546B2 (en) * 1997-06-16 2002-06-17 株式会社デンソー Engine shroud fan shroud
WO2001098099A1 (en) 2000-06-19 2001-12-27 Mccord Winn Textron Blow molded fan shroud
JP2002210810A (en) * 2001-01-16 2002-07-31 Kawasaki Heavy Ind Ltd Method for blow molding and molding using the same
US20040012125A1 (en) * 2001-06-19 2004-01-22 Plant William D. Blow molded fan shroud
US20100206882A1 (en) * 2009-02-13 2010-08-19 Wessels Timothy J Multi chamber coolant tank
US20130327511A1 (en) 2012-06-06 2013-12-12 Tesla Motors, Inc. Passive air bleed for improved cooling systems
CN104895662B (en) * 2015-05-06 2017-11-28 贵州凯宏汇达冷却系统有限公司 A kind of novel vehicle radiator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2044033A1 (en) * 1969-12-30 1971-07-08 Modine Manufacturing Co , Racine, Wis (VStA) Liquid cooler

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604502A (en) * 1969-09-04 1971-09-14 Modine Mfg Co Coolant deaeration system for internal combustion engine cooled by crossflow radiator
FR2395397A1 (en) * 1977-06-22 1979-01-19 Chausson Usines Sa WATER BOX FOR PRESSURIZING NOURISHES
US4209062A (en) * 1978-02-10 1980-06-24 Karmazin Products Corporation Heat exchanger construction
FR2483798A1 (en) * 1980-06-06 1981-12-11 Valeo DEVICE FOR DEGASSING A LIQUID CIRCULATING IN A HEAT EXCHANGER
FR2499704B1 (en) * 1981-02-12 1986-08-14 Valeo HEAT EXCHANGER AND ITS WATER BOX DEVICE AND EXPANSION VESSEL
FR2503345B1 (en) * 1981-04-02 1986-04-11 Valeo HEAT EXCHANGER AND ITS WATER BOX DEVICE AND EXPANSION VESSEL
FR2532740B1 (en) * 1982-09-03 1988-02-05 Valeo HEAT EXCHANGER, PARTICULARLY FOR A COOLING CIRCUIT OF A DIESEL ENGINE
US4449692A (en) * 1982-11-15 1984-05-22 Ford Motor Company Drain construction for a radiator
FR2536522A1 (en) * 1982-11-18 1984-05-25 Valeo WATER BOX COMPRISING A DEGASSING PASSAGE AND HEAT EXCHANGER COMPRISING SUCH A BOX OF WATER

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2044033A1 (en) * 1969-12-30 1971-07-08 Modine Manufacturing Co , Racine, Wis (VStA) Liquid cooler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640364A1 (en) * 1988-12-08 1990-06-15 Valeo Water tank and expansion vessel device for heat exchanger, in particular for cooling radiator
DE4332101A1 (en) * 1993-09-22 1995-03-23 Bayerische Motoren Werke Ag Cooling device for a liquid-cooled internal combustion engine of a motor vehicle
US5477816A (en) * 1993-09-22 1995-12-26 Bayerische Motoren Werke Aktiengesellschaft Cooling apparatus for a motor vehicle liquid-cooled internal combustion engine
DE4332101B4 (en) * 1993-09-22 2005-09-15 Bayerische Motoren Werke Ag Cooling device for a liquid-cooled internal combustion engine of a motor vehicle
US5572958A (en) * 1994-06-24 1996-11-12 Bayerische Motoren Werke Ag Cooling arrangement for a liquid-cooled motor vehicle internal-combustion engine

Also Published As

Publication number Publication date
EP0184196A1 (en) 1986-06-11
US4763724A (en) 1988-08-16
DE3560958D1 (en) 1987-12-17
ES8701299A1 (en) 1986-12-01
DE3444273C1 (en) 1985-11-28
ES549617A0 (en) 1986-12-01
WO1986003554A1 (en) 1986-06-19

Similar Documents

Publication Publication Date Title
EP0184196B1 (en) Plastic water header tank for a cross-flow radiator for internal-combustion engines
EP0171623B1 (en) Volume compensation, venting and supply container for the liquid cooling system of an internal-combustion engine
DE602006000983T2 (en) Inlet manifold made of plastic
DE19538239C1 (en) Coolant flow in a cooling circuit of a liquid-cooled internal combustion engine
DE19758156A1 (en) Fuel pump manifold
DE2827022A1 (en) WATER TANK AS RESERVE PRESSURE TANK
DE3112202A1 (en) COOLING DEVICE FOR LIQUID-COOLED INTERNAL COMBUSTION ENGINES
DE3236743A1 (en) HEAT EXCHANGER FOR LIQUID FLOW, ESPECIALLY FOR MOTOR VEHICLES
DE60115319T2 (en) Fuel tank and manufacturing process
EP1260685B1 (en) Coolant tank of an internal combustion engine
DE3625376C1 (en) Crankcase ventilation for motor vehicles
DE3204493A1 (en) DEVICE FOR FORMING A WATER CASE AND AN EXPANSION VESSEL FOR A HEAT EXCHANGER
DE20313567U1 (en) Elastic connector
DE3446007C2 (en) Water tank and expansion tank for a heat exchanger of an internal combustion engine
DE4023094C2 (en) Plastic fuel tank for a motor vehicle
DE3013990C2 (en)
DE3825330C2 (en)
DE4328448C2 (en) Heat exchanger
EP0184197B1 (en) Plastic header for a cross-flow cooler for internal-combustion engines
DE2840813C2 (en) Cooler with vertical cooling tubes and a ventilation device
DE2615728B2 (en) Coolant circuit of an internal combustion engine
DE3702272A1 (en) Trunk piston for internal combustion engines with a hollow space through which cooling oil flows
DE60202622T2 (en) A radiator for motor vehicles with pipes integrated in a line tank
DE1097761B (en) Liquid cooling circuit of internal combustion engines, especially for motor vehicles, controlled by a thermostat
EP0772552B1 (en) Container for liquids

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19860411

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 19860923

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 3560958

Country of ref document: DE

Date of ref document: 19871217

ET Fr: translation filed
ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19931130

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19931202

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19931230

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19941204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19941205

EAL Se: european patent in force in sweden

Ref document number: 85115360.1

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19941204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950831

EUG Se: european patent has lapsed

Ref document number: 85115360.1

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050126

Year of fee payment: 20