EP0915237A2 - Cooling system for an internal combustion engine - Google Patents

Cooling system for an internal combustion engine Download PDF

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Publication number
EP0915237A2
EP0915237A2 EP98890316A EP98890316A EP0915237A2 EP 0915237 A2 EP0915237 A2 EP 0915237A2 EP 98890316 A EP98890316 A EP 98890316A EP 98890316 A EP98890316 A EP 98890316A EP 0915237 A2 EP0915237 A2 EP 0915237A2
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EP
European Patent Office
Prior art keywords
thermostat
cooling system
cooling water
water pump
side housing
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
EP98890316A
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German (de)
French (fr)
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EP0915237A3 (en
EP0915237B1 (en
Inventor
Siegfried Ing. Heer
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TCG Unitech AG
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TCG Unitech AG
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Publication of EP0915237A2 publication Critical patent/EP0915237A2/en
Publication of EP0915237A3 publication Critical patent/EP0915237A3/en
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    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • 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
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • F04D15/0263—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being temperature, ingress of humidity or leakage
    • 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
    • F01P2070/00—Details

Definitions

  • the present invention relates to a cooling system for motor vehicles with a radial pump trained cooling water pump and a thermostat for regulating the cooling, which is installed in a thermostat housing, the cooling water pump being a suction side Has housing which is integrally formed with the thermostat housing.
  • Such a cooling system should be as simple as possible own and be compact.
  • the simple structure enables an inexpensive production and the greatest possible reliability.
  • the compact structure is necessary because the installation space for ancillaries an increasing number of restrictions subject to.
  • a cooling system consists in its entirety of a cooling water pump, which is usually designed as a radial pump and the cooling water to the engine block and / or to the cylinder head of an internal combustion engine. From the engine block or Cylinder head leads a bypass line directly to a thermostat, while another line is also led to the thermostat via a cooler.
  • a heating heat exchanger provided that uses the heat of the cooling water in the interior to heat the air to be injected into the vehicle.
  • a thermostat In conventional cooling systems, a thermostat is occasionally arranged in the area of the cooler. Below a predetermined temperature, an expansion element blocks the Cooling water passage through the cooler, so that the cooling water only through the bypass line in the so-called small cycle. This enables a quick heating of the Engine after cold start. When the predetermined temperature is reached, the expansion element changes its length and clears the way of the cooling water through the radiator, so that proper engine cooling is achieved.
  • a thermostat is in the Area of the cooling water pump arranged.
  • the suction side and pressure side housing of the Cooling water pump consists of two separate components, and is for the thermostat at least a third component is provided.
  • Such cooling systems are functional satisfactory, but the manufacture and assembly is relatively complex.
  • WO 96/03574 describes a cooling system for an internal combustion engine known in which the cooling water pump and the thermostat arranged relatively compact are.
  • the flow to the thermostat is essentially frustoconical Housing, and the flow to the thermostat is essentially along its axis. It has it turned out that the response time with such a construction is relatively long. This means that the thermostat is closed during a cold start to keep the cooling water on Pass the cooler. With the engine warm, however, the thermostat should open to to ensure adequate cooling.
  • certain Operating conditions the cooling water reach its target temperature relatively quickly and exceed for a certain period of time until the thermostat opens. It can undesirable overheating.
  • the object of the present invention is to develop the cooling system described at the outset in such a way that that a simple and inexpensive production is possible and that a particularly simple structure is achieved. In particular, a quick response should be the thermostat.
  • this object is achieved in that on a connection part for the heating return is integrally formed a flow deflection bar, which partially the thermostat surrounds.
  • a holder for the thermostat is made in one piece with a bearing part is designed for the cooling water pump. Due to the inventive design of the Cooling system, the number of components can be reduced and it can be a special one compact and easy to manufacture cooling water pump thermostat unit shown become.
  • a pressure-side housing the cooling water pump is partly formed by the component that is the suction side Housing forms and the other part is formed by the bearing part, and especially when the sealing plane between the suction side housing and the bearing part the pressure side housing essentially divides along a middle plane.
  • connection part for a heating return is provided, which is attached to a flange on the thermostat housing is oriented essentially parallel to the axial direction of the thermostat. Of the Thereby the cooling medium flows directly from the heating return.
  • a flow deflection bar is in one piece is formed with a fastening part on which a connection part for a heating return can be fastened in two different orientations.
  • a position of the connector is particularly suitable for a longitudinal installation of the engine, while the another position is suitable for transverse installation.
  • a further significant simplification can be achieved if the suction side Housing formed as part of the engine block or the cylinder head of an internal combustion engine is. In this way, a further component can be omitted and the effort involved in Machining can be reduced because, for example, the cylinder head in any case for different other machining operations must be clamped.
  • the water pump thermostat unit of FIG. 1 consists of a first component 1, which is in one piece the suction-side housing 1a of the cooling water pump 2 and the thermostat housing 1b forms.
  • On the first component 1 is the bearing part 4 for the cooling water pump via a seal 3 2 flanged, which simultaneously forms the holder 4a for the thermostat 5.
  • a connection 6 on the bearing part 4 is for the return of the cooling water from the cooler, not shown intended.
  • a pump impeller 7 is placed on a pump shaft 8 in order to move from it Rotary motion to be offset.
  • the pressure-side space of the cooling water pump 2 is partial as a recess 9a in the bearing part 4 and the other part as a recess 9b in the first Component 1 is formed.
  • the thermostat 5 has an expansion element 10 which is mounted on a bracket 11 which is held by brackets 21.
  • a first spring 12 presses a first poppet valve 13 into the closed position.
  • a second spring 14 loads a second poppet valve 15 in the closing direction.
  • the springs 12 and 14 are designed as compression diaphragm springs.
  • the poppet valve 13 controls an opening through which cooling water from the radiator, not shown, to the cooling water pump 2 is returned.
  • the poppet valve 15 controls the bypass connection 16, via the Cooling water is returned directly from the engine block or cylinder head, not shown.
  • On a side flange 17 of component 1 is a connector 18 for the return of a heating heat exchanger, not shown, is provided.
  • a Flow deflection bracket 19 formed, which surrounds the thermostat 5.
  • the bracket 19 has the Task to redirect the cooling water that flows through the poppet valve 15 so that it Thermostat 5 flows safely. This ensures that the thermostat increases the temperature of the returning cooling water reacts quickly and reliably and when a predetermined temperature is exceeded, the poppet valve 15 closes. Training the flow deflection bracket 19 made of plastic allows a significant simplification of the manufacturing process for component 1 compared to one molded on it Rib. This can result in significant cost savings.
  • a seal 20 is provided to seal the connector 18 against the flange 17.
  • the flow deflection bracket 19 can be integrally formed with the connecting part 18, in An alternative embodiment variant can, however, provide that the flow deflection bracket 19 is formed on its own fastening part, which with the connecting part 18 in two different positions can be connected, for example via a dovetail guide. This makes it possible to use the connection part using the same components 18 in different positions, d. H. in a position in which the Connection part 18 shows in Fig. 2 to the left. as shown, or alternatively in one Position in which he points to the right.
  • the present invention enables an assembly consisting of a cooling water pump and thermostat, with few components and low manufacturing costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The system has a cooling water pump (2) with a suction-side housing (1a) which is formed in one piece with the thermostat housing (1b). On a connecting part (18) for the heating back flow a flow deflection stirrup (19) is formed in one piece, which partly surrounds the thermostat (5). A retention for the thermostat is formed in one piece with a bearing part (4) for the cooling water pump.

Description

Die vorliegende Erfindung betrifft ein Kühlsystem für Kraftfahrzeuge mit einer als Radialpumpe ausgebildeten Kühlwasserpumpe und einem Thermostat zur Regelung der Kühlung, der in einem Thermostatgehäuse eingebaut ist, wobei die Kühlwasserpumpe ein saugseitiges Gehäuse aufweist, das einstückig mit dem Thermostatgehäuse ausgebildet ist.The present invention relates to a cooling system for motor vehicles with a radial pump trained cooling water pump and a thermostat for regulating the cooling, which is installed in a thermostat housing, the cooling water pump being a suction side Has housing which is integrally formed with the thermostat housing.

An das Kühlsystem von Brennkraftmaschinen für Kraftfahrzeuge werden versehiedene Ansprüche gestellt. Insbesonders soll ein solches Kühlsystem einen möglichst einfachen Aufbau besitzen und kompakt ausgeführt sein. Der einfache Aufbau ermöglicht eine kostengünstige herstellung und eine möglichst große Ausfallssicherheit. Der kompakte Aufbau ist notwendig, da der Einbauraum für Nebenaggregate einer zunehmenden Anzahl von Beschränkungen unterliegt. Ein solches Kühlsystem besteht in seiner Gesamtheit aus einer Kühlwasserpumpe, die üblicherweise als Radialpumpe ausgebildet ist und die Kühlwasser zu dem Motorblock und/oder zu dem Zylinderkopf einer Brennkraftmaschine zuführt. Von dem Motorblock bzw. Zylinderkopf führt eine Bypaßleitung direkt zu einem Thermostat, während eine weitere Leitung über einen Kühler ebenfalls zu dem Thermostat geführt wird. Darüber hinaus ist ein Heizungswärmetauscher vorgesehen, der die Wärme des Kühlwassers dazu nützt, die in den Innenraum des Fahrzeugs einzublasende Luft zu erwärmen.Various demands are made of the cooling system of internal combustion engines for motor vehicles posed. In particular, such a cooling system should be as simple as possible own and be compact. The simple structure enables an inexpensive production and the greatest possible reliability. The compact structure is necessary because the installation space for ancillaries an increasing number of restrictions subject to. Such a cooling system consists in its entirety of a cooling water pump, which is usually designed as a radial pump and the cooling water to the engine block and / or to the cylinder head of an internal combustion engine. From the engine block or Cylinder head leads a bypass line directly to a thermostat, while another line is also led to the thermostat via a cooler. In addition, there is a heating heat exchanger provided that uses the heat of the cooling water in the interior to heat the air to be injected into the vehicle.

Bei herkömmlichen Kühlsystemen ist ein Thermostat fallweise im Bereich des Kühlers angeordnet. Unterhalb einer vorbestimmten Temperatur sperrt dabei ein Dehnstoffelement den Kühlwasserdurchtritt durch den Kühler ab, so daß das Kühlwasser nur über die Bypaßleitung im sogenannten kleinen Kreislauf geführt wird. Dies ermöglicht eine schnelle Erwärmung des Motors nach dem Kaltstart. Bei Erreichen der vorbestimmten Temperatur ändert das Dehnstoffelement seine Länge und gibt den Weg des Kühlwassers durch den Kühler frei, so daß eine ordnungsgemäße Kühlung des Motors erreicht wird.In conventional cooling systems, a thermostat is occasionally arranged in the area of the cooler. Below a predetermined temperature, an expansion element blocks the Cooling water passage through the cooler, so that the cooling water only through the bypass line in the so-called small cycle. This enables a quick heating of the Engine after cold start. When the predetermined temperature is reached, the expansion element changes its length and clears the way of the cooling water through the radiator, so that proper engine cooling is achieved.

Bei einer anderen bekannten Ausführungsvariante eines Kühlsystems ist ein Thermostat im Bereich der Kühlwasserpumpe angeordnet. Das saugseitige und druckseitige Gehäuse der Kühlwasserpumpe besteht dabei aus zwei getrennten Bauteilen, und für den Thermostat ist mindestens ein dritter Bauteil vorgesehen. Solche Kühlsysteme sind von ihrer Funktion her zufriedenstellend, die Herstellung und die Montage ist jedoch relativ aufwendig.In another known embodiment of a cooling system, a thermostat is in the Area of the cooling water pump arranged. The suction side and pressure side housing of the Cooling water pump consists of two separate components, and is for the thermostat at least a third component is provided. Such cooling systems are functional satisfactory, but the manufacture and assembly is relatively complex.

Aus der WO 96/03574 ist ein Kühlsystem für eine Brennkraftmaschine mit innerer Verbrennung bekannt, bei dem die Kühlwasserpumpe und das Thermostat relativ kompakt angeordnet sind. Die Anströmung des Thermostats erfolgt über ein im wesentlichen kegelstumpfförmiges Gehäuse, und der Thermostat wird im wesentlichen entlang seiner Achse angeströmt. Es hat sich herausgestellt, daß die Ansprechdauer bei einer solchen Bauweise relativ lang ist. Dies bedeutet, daß bei einem Kaltstart der Thermostat geschlossen ist, um das Kühlwasser am Kühler vorbeizuführen. Bei betriebswarmen Motor sollte jedoch der Thermostat öffnen, um eine ausreichende Kühlung zu gewährleisten. Bei der herkömmlichen Lösung kann unter bestimmten Betriebsbedingungen das Kühlwasser seine Solltemperatur relativ rasch erreichen und für einen bestimmten Zeitraum überschreiten bis der Thermostat öffnet. Dadurch kann es zu unerwünschten Überhitzungen kommen.WO 96/03574 describes a cooling system for an internal combustion engine known in which the cooling water pump and the thermostat arranged relatively compact are. The flow to the thermostat is essentially frustoconical Housing, and the flow to the thermostat is essentially along its axis. It has it turned out that the response time with such a construction is relatively long. This means that the thermostat is closed during a cold start to keep the cooling water on Pass the cooler. With the engine warm, however, the thermostat should open to to ensure adequate cooling. In the conventional solution, certain Operating conditions the cooling water reach its target temperature relatively quickly and exceed for a certain period of time until the thermostat opens. It can undesirable overheating.

Aufgabe der vorliegenden Erfindung ist es, das eingangs beschriebene Kühlsystem so weiterzubilden, daß eine möglichst einfache und kostengünstige Herstellung möglich ist und daß ein besonders einfacher Aufbau erreicht wird. Insbesonders soll ein schnelles Ansprechverhalten des Thermostates gesichert sein.The object of the present invention is to develop the cooling system described at the outset in such a way that that a simple and inexpensive production is possible and that a particularly simple structure is achieved. In particular, a quick response should be the thermostat.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß an einem Anschlußteil für den Heizungsrücklauf einstückig ein Strömungsumlenkbügel ausgebildet ist, der den Thermostat teilweise umgibt.According to the invention this object is achieved in that on a connection part for the heating return is integrally formed a flow deflection bar, which partially the thermostat surrounds.

Besonders günstig ist es, wenn eine Halterung für den Thermostat einstückig mit einem Lagerteil für die Kühlwasserpumpe ausgebildet ist. Durch die erfindungsgemäße Ausbildung des Kühlsystems kann die Anzahl der Bauteile verringert werden und es kann eine besonders kompakte und einfach herzustellende Kühlwasserpumpen-Thermostat-Einheit dargestellt werden.It is particularly favorable if a holder for the thermostat is made in one piece with a bearing part is designed for the cooling water pump. Due to the inventive design of the Cooling system, the number of components can be reduced and it can be a special one compact and easy to manufacture cooling water pump thermostat unit shown become.

Gußtechnisch und strömungstechnisch besonders günstig ist es, wenn ein druckseitiges Gehäuse der Kühlwasserpumpe zum einen Teil von dem Bauteil gebildet wird, der das saugseitige Gehäuse bildet und zum anderen Teil vom Lagerteil gebildet wird, und insbesonders, wenn die Dichtebene zwischen dem saugseitigen Gehäuse und dem Lagerteil das druckseitige Gehäuse im wesentlichen entlang einer mittleren Ebene teilt.In terms of casting technology and flow technology, it is particularly favorable if a pressure-side housing the cooling water pump is partly formed by the component that is the suction side Housing forms and the other part is formed by the bearing part, and especially when the sealing plane between the suction side housing and the bearing part the pressure side housing essentially divides along a middle plane.

In einer besonders bevorzugten Ausführungsvariante der Erfindung ist ein Anschlußteil für einen Heizungsrücklauf vorgesehen, der an einer Flanschfläche am Thermostatgehäuse befestigt ist, die im wesentlichen parallel zur Axialrichtung des Thermostats orientiert ist. Der Thermostat wird dabei von dem Kühlmedium aus dem Heizungsrücklauf direkt angeströmt.In a particularly preferred embodiment of the invention, a connection part for a heating return is provided, which is attached to a flange on the thermostat housing is oriented essentially parallel to the axial direction of the thermostat. Of the Thereby the cooling medium flows directly from the heating return.

Um mit einer möglichst großen Anzahl von Gleichteilen verschiedene Einbausituationen eines Motors bewältigen zu können, ist es weiters günstig, wenn ein Strömungsumlenkbügel einstückig mit einem Befestigungsteil ausgebildet ist, an dem ein Anschlußteil für einen Heizungsrücklauf in zwei unterschiedlichen Orientierungen befestigbar ist. Eine Stellung des Anschlußteils ist dabei etwa besonders für einen Längseinbau des Motors geeignet, während die andere Stellung für einen Quereinbau geeignet ist.In order to have different installation situations with the largest possible number of identical parts To be able to cope with the motor, it is also favorable if a flow deflection bar is in one piece is formed with a fastening part on which a connection part for a heating return can be fastened in two different orientations. A position of the connector is particularly suitable for a longitudinal installation of the engine, while the another position is suitable for transverse installation.

Eine weitere bedeutende Vereifachung kann dadurch erreicht werden, wenn das saugseitige Gehäuse als Teil des Motorblocks oder des Zylinderkopfs einer Brennkraftmaschine ausgebildet ist. Auf diese Weise kann ein weiterer Bauteil entfallen, und es kann der Aufwand bei der Bearbeitung verringert werden, da beispielsweise der Zylinderkopf in jedem Fall für verschiedene andere Bearbeitungsvorgänge eingespannt werden muß.A further significant simplification can be achieved if the suction side Housing formed as part of the engine block or the cylinder head of an internal combustion engine is. In this way, a further component can be omitted and the effort involved in Machining can be reduced because, for example, the cylinder head in any case for different other machining operations must be clamped.

In der Folge wird die vorliegende Erfindung anhand des in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
eine axonometrische Explosionsdarstellung des wesentlichen Teils eines erfindungsgemäßen Kühlsystems und
Fig. 2
einen Schnitt durch die Vorrichtung von Fig. 1.
The present invention is explained in more detail below on the basis of the exemplary embodiment illustrated in the figures. Show it:
Fig. 1
an axonometric exploded view of the essential part of a cooling system according to the invention and
Fig. 2
a section through the device of Fig. 1st

Die Wasserpumpen-Thermostat-Einheit der Fig. 1 besteht aus einem ersten Bauteil 1, der einstückig das saugseitige Gehäuse 1a der Kühlwasserpumpe 2 und das Thermostatgehäuse 1b bildet. An dem ersten Bauteil 1 ist über eine Dichtung 3 der Lagerteil 4 für die Kühlwasserpumpe 2 angeflanscht, der gleichzeitig die Halterung 4a für den Thermostat 5 bildet. Ein Anschluß 6 am Lagerteil 4 ist für den Rücklauf des Kühlwassers vom nicht dargestellten Kühler vorgesehen. Ein Pumpenlaufrad 7 ist auf einer Pumpenwelle 8 aufgesetzt, um von dieser in Drehbewegung versetzt zu werden. Der druckseitige Raum der Kühlwasserpumpe 2 ist teilweise als Ausnehmung 9a im Lagerteil 4 und zum anderen Teil als Ausnehmung 9b im ersten Bauteil 1 ausgebildet.The water pump thermostat unit of FIG. 1 consists of a first component 1, which is in one piece the suction-side housing 1a of the cooling water pump 2 and the thermostat housing 1b forms. On the first component 1 is the bearing part 4 for the cooling water pump via a seal 3 2 flanged, which simultaneously forms the holder 4a for the thermostat 5. A connection 6 on the bearing part 4 is for the return of the cooling water from the cooler, not shown intended. A pump impeller 7 is placed on a pump shaft 8 in order to move from it Rotary motion to be offset. The pressure-side space of the cooling water pump 2 is partial as a recess 9a in the bearing part 4 and the other part as a recess 9b in the first Component 1 is formed.

Der Thermostat 5 besitzt ein Dehnstoffelement 10, das über eine Halterung 11 gelagert ist, die von Klammern 21 gehalten wird. Eine erste Feder 12 drückt ein erstes Tellerventil 13 in die geschlossene Stellung. Eine zweite Feder 14 belastet ein zweites Tellerventil 15 in Schließrichtung. Die Federn 12 und 14 sind als Drucksehraubenfedern ausgebildet. Das Tellerventil 13 steuert eine Öffnung, durch die Kühlwasser vom nicht dargestellten Kühler zur Kühlwasserpumpe 2 rückgeführt wird. Das Tellerventil 15 steuert den Bypaßanschluß 16, über den Kühlwasser direkt vom nicht dargestellten Motorblock bzw. Zylinderkopf rückgeführt wird. An einem seitlichen Flansch 17 des Bauteils 1 ist ein Anschlußteil 18 für den Rücklauf von einem nicht dargestellten Heizungswärmetauscher vorgesehen. Am Anschlußteil 18 ist ein Strömungsumlenkbügel 19 angeformt, der den Thermostat 5 umschließt. Der Bügel 19 hat die Aufgabe, das Kühlwasser, das durch das Tellerventil 15 einströmt, so umzulenken, daß es den Thermostat 5 sicher umströmt. Dadurch wird gewährleistet, daß der Thermostat auf eine Erhöhung der Temperatur des rücklaufenden Kühlwassers schnell und zuverlässig reagiert und bei Überschreiten einer vorbestimmten Temperatur das Tellerventil 15 schließt. Die Ausbildung des Strömungsumlenkbügels 19 aus Kunststoff ermöglicht eine wesentliche Vereinfachung des Herstellungsverfahrens für den Bauteil 1 im Vergleich zu einer an diesem augeformten Rippe. Dadurch kann eine wesentliche Kostenersparnis erzielt werden.The thermostat 5 has an expansion element 10 which is mounted on a bracket 11 which is held by brackets 21. A first spring 12 presses a first poppet valve 13 into the closed position. A second spring 14 loads a second poppet valve 15 in the closing direction. The springs 12 and 14 are designed as compression diaphragm springs. The poppet valve 13 controls an opening through which cooling water from the radiator, not shown, to the cooling water pump 2 is returned. The poppet valve 15 controls the bypass connection 16, via the Cooling water is returned directly from the engine block or cylinder head, not shown. On a side flange 17 of component 1 is a connector 18 for the return of a heating heat exchanger, not shown, is provided. At the connector 18 is a Flow deflection bracket 19 formed, which surrounds the thermostat 5. The bracket 19 has the Task to redirect the cooling water that flows through the poppet valve 15 so that it Thermostat 5 flows safely. This ensures that the thermostat increases the temperature of the returning cooling water reacts quickly and reliably and when a predetermined temperature is exceeded, the poppet valve 15 closes. Training the flow deflection bracket 19 made of plastic allows a significant simplification of the manufacturing process for component 1 compared to one molded on it Rib. This can result in significant cost savings.

Eine Dichtung 20 ist vorgesehen, um dem Anschlußteil 18 gegenüber dem Flansch 17 abzudichten. A seal 20 is provided to seal the connector 18 against the flange 17.

Der Strömungsumlenkbügel 19 kann einstückig mit dem Anschlußteil 18 ausgebildet sein, in einer alternativen Ausführungsvariante kann jedoch vorgesehen sein, daß der Strömungsumlenkbügel 19 an einem eigenen Befestigungsteil angeformt ist, der mit dem Anschlußteil 18 in zwei unterschiedlichen Stellungen verbindbar ist, beispielsweise über eine Schwalbenschwanzführung. Dadurch ist es möglich, unter Verwendung von gleichen Bauteilen den Anschlußteil 18 in unterschiedlichen Stellungen zu befestigen, d. h. in einer Stellung, in der der Anschlußteil 18 in der Fig. 2 nach links zeigt. wie dargestellt, oder alternativ dazu in einer Stellung, in der er nach rechts zeigt.The flow deflection bracket 19 can be integrally formed with the connecting part 18, in An alternative embodiment variant can, however, provide that the flow deflection bracket 19 is formed on its own fastening part, which with the connecting part 18 in two different positions can be connected, for example via a dovetail guide. This makes it possible to use the connection part using the same components 18 in different positions, d. H. in a position in which the Connection part 18 shows in Fig. 2 to the left. as shown, or alternatively in one Position in which he points to the right.

Die vorliegende Erfindung ermöglicht es, eine Baugruppe, bestehend aus Kühlwasserpumpe und Thermostat, mit wenigen Bauteilen und geringem Herstellungsaufwand zu realisieren.The present invention enables an assembly consisting of a cooling water pump and thermostat, with few components and low manufacturing costs.

Claims (8)

Kühlsystem für Kraftfahrzeuge mit einer als Radialpumpe ausgebildeten Kühlwasserpumpe und einem Thermostat (5) zur Regelung der Kühlung, der in einem Thermostatgehäuse (1b) eingebaut ist, wobei die Kühlwasserpumpe (2) ein saugseitiges Gehäuse (1a) aufweist, das einstückig mit dem Thermostatgehäuse (1b) ausgebildet ist dadurch gekennzeichnet, daß an einem Anschlußteil (18) für den Heizungsrücklauf einstückig ein Strömungsumlenkbügel (19) ausgebildet ist, der den Thermostat (5) teilweise umgibt.Cooling system for motor vehicles with a cooling water pump designed as a radial pump and a thermostat (5) for controlling the cooling, which is installed in a thermostat housing (1b), the cooling water pump (2) having a suction-side housing (1a) which is integral with the thermostat housing ( 1b) is characterized in that a flow deflection bracket (19) which partially surrounds the thermostat (5) is integrally formed on a connection part (18) for the heating return. Kühlsystem nach Anspruch 1, dadurch gekennzeichnet, daß eine Halterung (4a) für den Thermostat (5) einstückig mit einem Lagerteil (4) für die Kühlwasserpumpe (2) ausgebildet ist.Cooling system according to claim 1, characterized in that a holder (4a) for the thermostat (5) is formed in one piece with a bearing part (4) for the cooling water pump (2). Kühlsystem nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß ein druckseitiges Gehäuse (9a, 9b) der Kühlwasserpumpe (2) zum einen Teil von dem Bauteil (1) gebildet wird, der das saugseitige Gehäuse (1a) bildet, und zum anderen Teil vom Lagerteil (4) gebildet wird.Cooling system according to one of claims 1 or 2, characterized in that a pressure-side housing (9a, 9b) of the cooling water pump (2) is partly formed by the component (1) which forms the suction-side housing (1a) and secondly Part of the bearing part (4) is formed. Kühlsystem nach Anspruch 3, dadurch gekennzeichnet, daß die Dichtebene zwischen dem saugseitigen Gehäuse (1a) und dem Lagerteil (4) das druckseitige Gehäuse (9a, 9b) im wesentlichen entlang einer mittleren Ebene teilt.Cooling system according to claim 3, characterized in that the sealing plane between the suction-side housing (1a) and the bearing part (4) divides the pressure-side housing (9a, 9b) essentially along a central plane. Kühlsystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein Anschlußteil (18) für einen Heizungsrücklauf vorgesehen ist, der an einer Flanschfläche (17) am Thermostatgehäuse (1b) befestigt ist, die im wesentlichen parallel zur Axialrichtung des Thermostats (5) orientiert ist.Cooling system according to one of claims 1 to 4, characterized in that a connection part (18) is provided for a heating return, which is attached to a flange surface (17) on the thermostat housing (1b) which is substantially parallel to the axial direction of the thermostat (5) is oriented. Kühlsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Anschlußteil (18) für den Heizungsrücklauf so ausgerichtet ist, daß der Thermostat (5) im wesentlichen rechtwinkelig zu seiner Achse angeströmt wird.Cooling system according to one of claims 1 to 5, characterized in that the connection part (18) for the heating return is oriented such that the flow to the thermostat (5) is substantially perpendicular to its axis. Kühlsystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß ein Strömungsumlenkbügel (19) einstückig mit einem Befestigungsteil ausgebildet ist, an dem ein Anschlußteil (18) für einen Heizungsrücklauf in zwei unterschiedlichen Orientierungen befestigbar ist.Cooling system according to one of claims 1 to 5, characterized in that a flow deflection bracket (19) is formed in one piece with a fastening part, to which a connecting part (18) for a heating return can be fastened in two different orientations. Kühlsystem nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das saugseitige Gehäuse als Teil des Motorblocks oder des Zylinderkopfs einer Brennkraftmaschine ausgebildet ist.Cooling system according to one of claims 1 to 7, characterized in that the suction-side housing is designed as part of the engine block or the cylinder head of an internal combustion engine.
EP98890316A 1997-11-06 1998-10-29 Cooling system for an internal combustion engine Expired - Lifetime EP0915237B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT695/97U 1997-11-06
AT0069597U AT2537U1 (en) 1997-11-06 1997-11-06 COOLING SYSTEM FOR MOTOR VEHICLES
AT69597U 1997-11-06

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EP0915237A2 true EP0915237A2 (en) 1999-05-12
EP0915237A3 EP0915237A3 (en) 2000-01-05
EP0915237B1 EP0915237B1 (en) 2002-09-25

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US (1) US6112706A (en)
EP (1) EP0915237B1 (en)
AT (2) AT2537U1 (en)
DE (1) DE59805674D1 (en)

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Also Published As

Publication number Publication date
EP0915237A3 (en) 2000-01-05
US6112706A (en) 2000-09-05
AT2537U1 (en) 1998-12-28
DE59805674D1 (en) 2002-10-31
EP0915237B1 (en) 2002-09-25
ATE224999T1 (en) 2002-10-15

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