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WO1998002650A1 - Cooling system for an internal combustion engine - Google Patents

Cooling system for an internal combustion engine Download PDF

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Publication number
WO1998002650A1
WO1998002650A1 PCT/EP1997/003793 EP9703793W WO9802650A1 WO 1998002650 A1 WO1998002650 A1 WO 1998002650A1 EP 9703793 W EP9703793 W EP 9703793W WO 9802650 A1 WO9802650 A1 WO 9802650A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
cooling system
engine block
cooling water
cooling
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.)
Ceased
Application number
PCT/EP1997/003793
Other languages
German (de)
French (fr)
Other versions
WO1998002650B1 (en
Inventor
Jürgen NÄGELER
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19780704T priority Critical patent/DE19780704D2/en
Priority to AU37674/97A priority patent/AU3767497A/en
Publication of WO1998002650A1 publication Critical patent/WO1998002650A1/en
Publication of WO1998002650B1 publication Critical patent/WO1998002650B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • 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
    • F01P1/00—Air cooling
    • F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
    • F01P2001/023—Cooling cylinders
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/021—Cooling cylinders
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/024—Cooling cylinder heads
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/027—Cooling cylinders and cylinder heads in parallel
    • 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
    • F01P2005/105—Using two or more 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/31—Cylinder temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/33—Cylinder head temperature
    • 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
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed

Definitions

  • the invention relates to a cooling system for an internal combustion engine, in particular a motor vehicle.
  • This can be both a gasoline engine and a diesel engine.
  • the object of the invention is to improve a cooling system of an internal combustion engine so that optimum cooling of the cylinder head is achieved.
  • This object is achieved in that the cylinder head or the cylinder heads is cooled by a cooling water circuit which runs only through the cylinder head and in which a cooling water pump is inserted.
  • a second cooling water circuit runs through the engine block and has a second pump.
  • a particularly simple construction is given when a second cooling water circuit branches off from the cooling water circuit as a bypass, which is controlled by a valve and flows through the engine block.
  • the engine block is air-cooled in particular by external cooling fins, so that only a single circuit is required.
  • a very precise control is given if at least one temperature sensor is arranged in or on the cooling water circuit (s) and or on the engine, the value (s) of which is evaluated by a control unit that controls the pump (s) and or the valve controls.
  • the fluid spaces of the cylinder head have no connections with the fluid spaces of the engine block. This ensures that water cannot escape at the connection point between the engine block and the cylinder head, so that no seal or only a simple seal is required at this point.
  • Figure 1 shows a first embodiment
  • Figure 2 shows a second embodiment
  • Figure 3 shows a third embodiment.
  • Figure 4 shows a fourth embodiment.
  • Figure 5 shows a fifth embodiment.
  • Figure 6 shows a sixth embodiment.
  • FIG. 7 shows a seventh exemplary embodiment.
  • Figure 8 shows an eighth embodiment.
  • Figure 8a shows a ninth embodiment.
  • Figure 9 shows a tenth embodiment.
  • Figure 10 shows a section of the engine with a missing cylinder head gasket and a cylinder or cylinder path immersed in the cylinder head.
  • the cylinder head 3 of an internal combustion engine 1 has a cooling water circuit A through it, with a flow AI coming from the cooler 6 and flowing to the cylinder head 3 via a pump 5. The heated water flows back to the cooler 6 via the return line A2.
  • the engine block 2 is cooled via a second cooling circuit B, which has a flow line B1, through which the cooling water flows from the cooler 6 via a second pump 4 to the engine block 2.
  • the cooling water heated by the engine block flows back to the radiator 6 via the return B2.
  • the motor pumps 4 and 5 arranged in both preliminary runs AI, B1 are controlled by a control unit (motor management) 10, the control unit receiving information about the temperature from two temperature sensors 9a and 9b in the two returns.
  • the temperature sensors can also be fastened in the forerunnings or directly to the cylinder head and / or engine block 2 and the temperatures can decrease here. There is no or only a simple seal between the cylinder head 3 and the engine block 2
  • the exemplary embodiment according to FIG. 2 differs from that of FIG. 1 in that the second cooling water circuit branches off to the engine block 2 only behind the motor pump 5 via a bypass valve 7. After the motor, both returns are merged into a single return or they are returned separately.
  • the bypass valve 7, like the one motor pump 5, is controlled by the control unit 10, which in turn receives information about the temperatures through temperature sensors 9a and 9b.
  • the embodiment of Figure 3 differs in that there is only one cooling circuit A, which only flows through the cylinder head 3.
  • the engine block 2 on the other hand, is cooled by cooling fins 2a.
  • the engine block 2 is designed as a coherent workpiece and the cylinder head 3 is also designed as a coherent workpiece, see FIGS. 1, 2 and 3. Furthermore, in accordance with FIG. 4, the engine block 2 can be designed as a crankcase with attached, separate cylinder liners Cooling fins 2b and 2a either from ferritic material or from light metal casting or from another material. According to the embodiment of Figure 5, the engine block 2 is designed as a crankcase with attached, separate cylinder liners with cooling fins 2b and 2a and with separate cylinder heads 3a either made of ferritic material or from light metal casting or from another material.
  • the cylinder head is designed as an overall head 3 or as individual heads 3a with a parallel flow of coolant 7a, i.e. each cylinder head is flowed separately with cooling water which has the same temperature, with the amount of cooling water (flow) per head alternatively is controlled via the engine management, for example thermally via a valve 7b.
  • the engine block 2 is designed as an entire block or with separate cylinder liners 2b with a parallel flow of coolant 7a, i.e. each cylinder is flowed separately with cooling water which has the same temperature, the amount of cooling water (flow) per cylinder alternatively via the engine management, for example thermally controlled via a valve 7b.
  • the cooling of the cylinder head as a total head 3 or as individual heads 3a takes place, as mentioned above, with a parallel flow of coolant 7a, that is to say, cooling water flows separately onto each cylinder head.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a cooling system for an internal combustion engine (1), in particular of a motor vehicle, the cylinder head(s) (3) and the engine block (2) or the cylinder bushes (2a, 2b) being cooled by a separate cooling water circulation system (A), or the cylinder head(s) (3) being cooled by a cooling water circulation system (B) which only extends through the cylinder head (3) and in which a cooling water pump (5) is fitted.

Description

Ktthlsystem für einen VerbrennungsmotorCooling system for an internal combustion engine

Die Erfindung betrifft ein Kühlsystem für einen Verbrennungsmotor, insbesondere eines Kraftfahrzeugs . Hierbei kann es sich sowohl um einen Ottomotor als auch um einen Dieselmotor handeln.The invention relates to a cooling system for an internal combustion engine, in particular a motor vehicle. This can be both a gasoline engine and a diesel engine.

Es ist bekannt, den Motorblock und den Zylinderkopf eines Verbrennungsmotors durch einen Kühlkreislauf zu kühlen, der in der Regel Wasser enthält und nach dem Durchlaufen des Motors zum Kühler geführt ist, um dort das Kühlwasser auf eine niedrigere Temperatur zu bringen. Hierbei ist es auch bekannt, im Kühlkreislauf eine Pumpe anzuordnen.It is known to cool the engine block and the cylinder head of an internal combustion engine by means of a cooling circuit which as a rule contains water and, after passing through the engine, is led to the cooler in order to bring the cooling water to a lower temperature there. It is also known to arrange a pump in the cooling circuit.

Bei Verbrennungsmotoren hat es sich gezeigt, daß der Zylinderkopf stärker gekühlt werden muß als der Motorblock, der bekanntlich thermisch weniger belastet ist. Dies wird bei bekannten Kühlsystemen nur dadurch berücksichtigt, daß man durch den Zylinderkopf verhältnismäßig viel Kühlflüssigkeit hindurch fließen läßt.In internal combustion engines, it has been shown that the cylinder head must be cooled more than the engine block, which is known to be less thermally stressed is. In known cooling systems, this is only taken into account by allowing a relatively large amount of coolant to flow through the cylinder head.

Aufgabe der Erfindung ist es, ein Kühlsystem eines Verbrennungsmotors so zu verbessern, daß eine optimale Kühlung des Zylinderkopfs erreicht wird.The object of the invention is to improve a cooling system of an internal combustion engine so that optimum cooling of the cylinder head is achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Zylinderkopf bzw. die Zylinderköpfe durch einen Kühlwasserkreislauf gekühlt wird, der nur durch den Zylinderkopf verläuft und in dem eine Kühlwasserpumpe eingefügt ist.This object is achieved in that the cylinder head or the cylinder heads is cooled by a cooling water circuit which runs only through the cylinder head and in which a cooling water pump is inserted.

Hierdurch kann eine separate Kühlung von Motorblock und Zylinderköpf erfolgen, so daß eine sehr exakte Steuerung der Kühlleistung gegenüber dem Zylinderkopf möglich wird Hierbei ist eine solche Konstruktion einfach und erfordert keinen zusätzlichen größeren Aufwand.This allows separate cooling of the engine block and cylinder head, so that very precise control of the cooling capacity relative to the cylinder head is possible. Such a construction is simple and does not require any additional major effort.

Besonders vorteilhaft ist es, wenn ein zweiter Kühlwasserkreislauf durch den Motorblock verläuft und eine zweite Pumpe aufweist. Damit kann auch der Motorblock sehr genau den Anforderungen gekühlt werden. Eine konstruktiv besonders einfache Konstruktion ist dan gegeben, wenn vom Kühlwasserkreislauf ein zweiter Kühlwasserkreislauf als Bypass abzweigt, der durch ein Ventil gesteuert ist und durch den Motorblock fließt. Von großem Vorteil ist es alternativ aber auch, wenn der Motorblock insbesondere, durch äußere Kühlrippen luftgekühlt ist, so daß nur ein einziger Kreislauf erforderlich ist. Eine sehr genaue Regelung ist gegeben, wenn in oder an dem oder den Kühlwasserkreislauf ( laufen) und oder am Motor, mindestens ein Temperaturfühler angeordnet ist, dessen Wert(e) von einer Steuerungseinheit ausgewertet wird, die die Pumpe(n) und oder das Ventil steuert.It is particularly advantageous if a second cooling water circuit runs through the engine block and has a second pump. This means that the engine block can also be cooled very precisely to the requirements. A particularly simple construction is given when a second cooling water circuit branches off from the cooling water circuit as a bypass, which is controlled by a valve and flows through the engine block. Alternatively, however, it is of great advantage if the engine block is air-cooled in particular by external cooling fins, so that only a single circuit is required. A very precise control is given if at least one temperature sensor is arranged in or on the cooling water circuit (s) and or on the engine, the value (s) of which is evaluated by a control unit that controls the pump (s) and or the valve controls.

Vorzugsweise wird vorgeschlagen, daß die Flüssigkeitsräume des Zylinderkopfes keine Verbindungen mit den mit den Flüssigkeitsräumen des Motorblocks haben. Hierdurch ist sichergestellt, daß an der Verbindungsstelle zwischen Motorblock und Zylinderkopf, Wasser nicht austreten kann und damit an dieser Stelle keine Dichtung oder nur eine einfache Dichtung erforderlich ist.It is preferably proposed that the fluid spaces of the cylinder head have no connections with the fluid spaces of the engine block. This ensures that water cannot escape at the connection point between the engine block and the cylinder head, so that no seal or only a simple seal is required at this point.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den übrigen Unteransprüchen aufgeführt.Further advantageous embodiments of the invention are listed in the remaining subclaims.

Ausführungsbeispiele der Erfindungen sind in den Zeichnungen schematisch dargestellt und werden im folgenden näher beschrieben, es zeigenEmbodiments of the inventions are shown schematically in the drawings and are described in more detail below, it show

Figur 1 ein erstes AusführungsbeispielFigure 1 shows a first embodiment

Figur 2 ein zweites Ausführungsbeispiel undFigure 2 shows a second embodiment and

Figur 3 ein drittes Ausführungsbeispiel.Figure 3 shows a third embodiment.

Figur 4 ein viertes Ausführungsbeispiel.Figure 4 shows a fourth embodiment.

Figur 5 ein fünftes Ausführungsbeispiel.Figure 5 shows a fifth embodiment.

Figur 6 ein sechstes Ausführungsbeispiel.Figure 6 shows a sixth embodiment.

Figur 7 ein siebtes Auεführungsbeispiel. Figur 8 ein achtes Ausführungsbeispiel.FIG. 7 shows a seventh exemplary embodiment. Figure 8 shows an eighth embodiment.

Figur 8a ein neuntes Ausführungsbeispiel.Figure 8a shows a ninth embodiment.

Figur 9 ein zehntes Ausführungsbeispiel.Figure 9 shows a tenth embodiment.

Figur 10 einen Ausschnitt aus dem Motor mit fehlender Zylinderkopfdichtung und einen in den Zylinderkopf eintauchenden Zylinder bzw. Zylinderbahn.Figure 10 shows a section of the engine with a missing cylinder head gasket and a cylinder or cylinder path immersed in the cylinder head.

Beim ersten Ausführungsbeispiel nach Figur 1, ist der Zylinderkopf 3 eines Verbrennungsmotors 1 von einem Kühlwasserkreislauf A durch- flössen mit einem Vorlauf AI , der vom Kühler 6 kommt und über eine Pumpe 5 zum Zylinderkopf 3 fließt. Das erwärmte Wasser strömt über den Rücklauf A2 zurück zum Kühler 6.In the first exemplary embodiment according to FIG. 1, the cylinder head 3 of an internal combustion engine 1 has a cooling water circuit A through it, with a flow AI coming from the cooler 6 and flowing to the cylinder head 3 via a pump 5. The heated water flows back to the cooler 6 via the return line A2.

Der Motorblock 2 wird über einen zweiten Kühlkreislauf B gekühlt, der einen Vorlauf Bl besitzt, durch den das Kühlwasser vom Kühler 6 über eine zweite Pumpe 4 zum Motorblock 2 fließt. Das vom Motorblock erwärmte Kühlwasser, fließt über den Rücklauf B2 zurück zum Kühler 6.The engine block 2 is cooled via a second cooling circuit B, which has a flow line B1, through which the cooling water flows from the cooler 6 via a second pump 4 to the engine block 2. The cooling water heated by the engine block flows back to the radiator 6 via the return B2.

Die in beiden Vorläufen AI, Bl angeodneten Motorpumpen 4 und 5, werden durch eine Steuerungseinheit (Motormanagement) 10 gesteuert, wobei die Steuerungseinheit von zwei Temperaturfühlern 9a und 9b in den beiden Rückläufen Informationen über die Temperatur erhält. Hierbei können die Temperaturfühler aber auch in den Vorläufen, oder direkt am Zylinderkopf und/oder Motorblock 2 befestigt sein und hier die Temperaturen abnehmen. Zwischen dem Zylinderkopf 3 und dem Motorblock 2 ist keine oder nur eine einfache DichtungThe motor pumps 4 and 5 arranged in both preliminary runs AI, B1 are controlled by a control unit (motor management) 10, the control unit receiving information about the temperature from two temperature sensors 9a and 9b in the two returns. Here, however, the temperature sensors can also be fastened in the forerunnings or directly to the cylinder head and / or engine block 2 and the temperatures can decrease here. There is no or only a simple seal between the cylinder head 3 and the engine block 2

( Zylinderkopfdichtung) erforderlich, da vom Kühlwasser durchflossenen Räume des Zylinderkopfε, nicht mit den vom Kühlwasser durchflossenen Räumen des Motorblockε verbunden sind.(Cylinder head gasket) is necessary because the spaces in the cylinder head through which the cooling water flows are not connected to the spaces in the engine block through which the cooling water flows.

Das Ausführungsbeispiel nach Figur 2 unterscheidet sich nach dem von Figur 1 dadurch, daß der zweite Kühlwasserkreislauf erst hinter der Motorpumpe 5 über ein Bypassventil 7 zum Motorblock 2 abzweigt. Hinter dem Motor werden beide Rückläufe zu einem einzigen Rücklauf zusammengeführt oder sie werden getrennt zurückgeführt. Das Bypassventil 7 wird wie auch die eine Motorpumpe 5, durch die Steuerungseinheit 10 gesteuert, die wiederum Informationen über die Temperaturen durch Temperaturfühler 9a und 9b erhält.The exemplary embodiment according to FIG. 2 differs from that of FIG. 1 in that the second cooling water circuit branches off to the engine block 2 only behind the motor pump 5 via a bypass valve 7. After the motor, both returns are merged into a single return or they are returned separately. The bypass valve 7, like the one motor pump 5, is controlled by the control unit 10, which in turn receives information about the temperatures through temperature sensors 9a and 9b.

Das Ausführungsbeispiel nach Figur 3 unterscheidet sich dadurch, daß nur noch ein Kühlkreislauf A besteht, der nur durch den Zylinderkopf 3 fließt. Der Motorblock 2 wird dagegen durch Kühlrippen 2a gekühlt.The embodiment of Figure 3 differs in that there is only one cooling circuit A, which only flows through the cylinder head 3. The engine block 2, on the other hand, is cooled by cooling fins 2a.

Die Ausbildung des Motorblocks 2 erfolgt als ein zusammenhängendes Werkstück und die Ausbildung des Zylinderkopfes 3 erfolgt ebenfalls als ein zusammenhängendes Werkstück, siehe Figur 1, 2 und 3. Ferner kann entsprechend Figur 4 die Ausbildung des Motorblocks 2 als Kurbelgehäuse mit aufgesetzten, getrennten Zylinderbüchsen erfolgen mit Kühlrippen 2b und 2a entweder aus ferritischem Material oder aus Leichtmetallguß oder aus einem anderen Material. Entsprechend dem Ausführungsbeispiel nach Figur 5 erfolgt die Ausbildung des Motorblocks 2 als Kurbelgehäuse mit aufgesetzten, getrennten Zylinderbüchsen mit Kühlrippen 2b und 2a und mit getrennten Zylinderköpfen 3a entweder aus ferritischem Material oder aus Leichtmetallguß oder aus einem anderen Material.The engine block 2 is designed as a coherent workpiece and the cylinder head 3 is also designed as a coherent workpiece, see FIGS. 1, 2 and 3. Furthermore, in accordance with FIG. 4, the engine block 2 can be designed as a crankcase with attached, separate cylinder liners Cooling fins 2b and 2a either from ferritic material or from light metal casting or from another material. According to the embodiment of Figure 5, the engine block 2 is designed as a crankcase with attached, separate cylinder liners with cooling fins 2b and 2a and with separate cylinder heads 3a either made of ferritic material or from light metal casting or from another material.

Im Ausführungsbeispiel nach den Figuren 6 und 7 erfolgt die Ausbildung des Zylinderkopfes als Gesamtkopf 3 oder als Einzelköpfe 3a mit paralleler Kühlmittelanströraung 7a, das heißt jeder Zylinderkopf wird separat mit Kühlwasser angeströmt, welches die gleiche Temperatur besitzt, wobei die Kühlwassermenge (Durchfluß) je Kopf alternativ über das Motormanagement, zum Beispiel thermisch über ein Ventil 7b gesteuert wird.In the exemplary embodiment according to FIGS. 6 and 7, the cylinder head is designed as an overall head 3 or as individual heads 3a with a parallel flow of coolant 7a, i.e. each cylinder head is flowed separately with cooling water which has the same temperature, with the amount of cooling water (flow) per head alternatively is controlled via the engine management, for example thermally via a valve 7b.

Entsprechend den Figuren 8, 8a und 9 erfolgt die Ausbildung des Motorblocks 2 als Gesamtblock oder mit getrennten Zylinderbuchsen 2b mit paralleler Kühlmittelanströmung 7a, das heißt jeder Zylinder wird separat mit Kühlwasser angeströmt, welches die gleiche Temperatur besitzt, wobei die Kühlwassermenge (Durchfluß) je Zylinder alternativ über das Motormanagement, zum Beispiel thermisch über ein Ventil 7b gesteuert wird. Die Kühlung des Zylinderkopfes als Gesamtkopf 3 oder als Einzelköpfe 3a erfolgt, wie oben angeführt, mit paralleler Kühlmittelanströmung 7a, das heißt jeder Zylinderkopf wird separat mit Kühlwasser angeströmt.According to FIGS. 8, 8a and 9, the engine block 2 is designed as an entire block or with separate cylinder liners 2b with a parallel flow of coolant 7a, i.e. each cylinder is flowed separately with cooling water which has the same temperature, the amount of cooling water (flow) per cylinder alternatively via the engine management, for example thermally controlled via a valve 7b. The cooling of the cylinder head as a total head 3 or as individual heads 3a takes place, as mentioned above, with a parallel flow of coolant 7a, that is to say, cooling water flows separately onto each cylinder head.

Es wird keine Flächendichtung zwischen dem Zylinderkopf 3 oder den Zylinderköpfen 3a und dem Motorblock 2 oder einzelnen Laufbüchεen 2b oder 2b + 2a benötigt. Außerdem kann die Konstruktion so ausgelegt werden, daß die Zylinderbahn in den Zylinderkopf 3, 3a eintaucht. Hierdurch entfallen Undefinierte Hohlräume. Die Bildung des Crevise-Volumen wird vermieden und der CH-Ausstoß reduziert (Figur 10). No surface seal is required between the cylinder head 3 or the cylinder heads 3a and the engine block 2 or individual liners 2b or 2b + 2a. In addition, the construction can be designed so that the cylinder track is immersed in the cylinder head 3, 3a. This eliminates undefined cavities. The formation of the crevise volume is avoided and the CH emissions are reduced (FIG. 10).

Claims

Ansprüche Expectations 1. Kühlsystem für einen Verbrennungsmotor (1, 2, 3) insbesondere eines Kraftfahrzeugs, d a d r c h g e k e n n z e i c h n e t , daß der Zylinderkopf (3) bzw. die Zylinderköpfe durch einen Kühlwasserkreislauf (A) gekühlt sind, der nur durch den Zylinderkopf (3) verläuft und in dem eine Kühlwasserpumpe (5) eingefügt ist.1. Cooling system for an internal combustion engine (1, 2, 3), in particular of a motor vehicle, characterized in that the cylinder head (3) or the cylinder heads are cooled by a cooling water circuit (A) which runs only through the cylinder head (3) and in which a cooling water pump (5) is inserted. 2. Kühlsystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß ein zweiter Kühlwasserkreislauf (B) durch den Motorblock (2) verläuft, der eine zweite Pumpe (4) aufweist.2. Cooling system according to claim 1, d a d u r c h g e k e n n z e i c h n e t that a second cooling water circuit (B) through the engine block (2) which has a second pump (4). 3. Kühlsystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß vom Kühlwasserkreislauf (A) ein zweiter Kühlwasserkreislauf (B) als Bypass abzweigt, der durch ein Ventil (7) gesteuert ist und durch den Motorblock (2) fließt. 3. Cooling system according to claim 1, characterized in that a second cooling water circuit (B) branches off from the cooling water circuit (A) as a bypass, which is controlled by a valve (7) and flows through the engine block (2). 4. Kühlsystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Motorblock insbesondere durch äußere Kühlrippen (2a) luftgekühlt ist.4. Cooling system according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the engine block is air-cooled in particular by external cooling fins (2a). 5. Kühlsystem nach einer der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß in oder an dem Kühlwasserkreislauf (laufen) (A, B) und oder am Motor (2, 9) mindestens ein Temperaturfühler (9a, 9b) angeordnet ist, dessen Wert(e) von einer Steuerungseinheit (10) ausgewertet wird (werden), die die Pumpe(n) (4, 5) und oder das Ventil (7) steuert.5. Cooling system according to one of the preceding claims, characterized in that in or on the cooling water circuit (run) (A, B) and or on the motor (2, 9) at least one temperature sensor (9a, 9b) is arranged, the value (s) is (are) evaluated by a control unit (10) which controls the pump (s) (4, 5) and or the valve (7). 6. Kühlsystem nach einer der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t , daß die Flüssigkeitsräume des Zylinderkopfs (3) keine Verbindungen mit den Flüssigkeitsräumen des Motorblocks6. Cooling system according to one of the preceding claims, that the liquid chambers of the cylinder head (3) have no connections with the liquid chambers of the engine block (2 ) haben.(2) have. 7. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß der Motorblock (2) als ein zusammenhängendes Werkstück und der Zylinderkopf (3) ebenfalls als ein zusammenhängendes Werkstück ausgebildet sind.7. Cooling system according to one of the preceding claims, that the engine block (2) is designed as a coherent workpiece and the cylinder head (3) is also designed as a coherent workpiece. 8. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß der Motorblock (2) als Kurbelgehäuse mit aufgesetzten, getrennten Zylinderbüchsen mit Kühlrippen (2b + 2a) vorzugsweise aus ferritischem Material oder aus Leichtmetallguß ausgebildet ist. 8. Cooling system according to one of the preceding claims, characterized in that the engine block (2) as a crankcase with attached, separate cylinder liners with cooling fins (2b + 2a) is preferably formed from ferritic material or from light metal casting. 9. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n nz e i c h n e t, daß der Motorblock (2) als Kurbelgehäuse mit aufgesetzten, getrennten Zylinderbüchsen mit Kühlrippen (2b + 2a) und mit getrennten Zylinderköpfen (3a) ausgebildet ist.9. Cooling system according to one of the preceding claims, so that the engine block (2) is designed as a crankcase with attached, separate cylinder liners with cooling fins (2b + 2a) and with separate cylinder heads (3a). 10. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n nz e i c h n e t, daß der Motorblock (2) als zusammenhängendes Werkstück einstückig ausgeführt ist und getrennte Zylinderköpfe (3a) aufweist.10. Cooling system according to one of the preceding claims, that the engine block (2) is designed in one piece as a coherent workpiece and has separate cylinder heads (3a). 11. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n nz e i c h n e t, daß der Zylinderkopf als Gesamtkopf (3) oder als Einzelkopf (3a) mit paralleler Kühlmittelanströmung (7a) ausgebildet ist, wobei jeder Zylinderkopf separat mit Kühlwasser, welches die gleiche Temperatur besitzt, angeströmt wird und die Kühlwassermenge je Kopf alternativ über das Motormanagement, insbesondere thermisch über ein Ventil (7b), gesteuert wird.11. Cooling system according to one of the preceding claims, characterized in that the cylinder head is designed as an overall head (3) or as a single head (3a) with parallel flow of coolant (7a), each cylinder head flowing separately with cooling water which has the same temperature and the amount of cooling water per head is alternatively controlled via the engine management, in particular thermally via a valve (7b). 12. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß der Motorblock (2) als Gesamtblock oder mit getrennten Zylinderbuchsen (2b) mit paralleler Kühlmittelanströmung (7a) ausgebildet ist, wobei jeder Zylinder separat mit Kühlwasser, welches die gleiche Temperatur besitzt, angeströmt wird, und die Kühlwassermenge je Zylinder alternativ über das Motormanagement, insbesondere thermisch über ein Ventil (7b) gesteuert wird. 12. Cooling system according to one of the preceding claims, characterized in that the engine block (2) as an entire block or with separate cylinder sleeves (2b) with a parallel flow of coolant (7a) is formed, each cylinder being flown separately with cooling water which has the same temperature , and the cooling water quantity per cylinder is alternatively controlled via the engine management, in particular thermally via a valve (7b). 13. Kühlsyεtem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß eine Flächendichtung zwischen dem Zylinderkopf (3) oder Zylinderköpfen (3a) und dem Motorblock (2) oder einzelnen Laufbüchsen (2b) oder (2b + 2a) fehlt. Außerdem kann die Konstruktion so ausgelegt werden, daß die Zylinderbahn in den Zylinderkopf (3, 3a) eintaucht.13. Cooling system according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that a surface seal between the cylinder head (3) or cylinder heads (3a) and the engine block (2) or individual liners (2b) or (2b + 2a) is missing. In addition, the construction can be designed so that the cylinder track is immersed in the cylinder head (3, 3a). 14. Kühlsystem nach einem der vorgenannten Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß die Zylinderbahn in den Zylinderkopf (3, 3a) eintaucht. 14. Cooling system according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the cylinder path is immersed in the cylinder head (3, 3a).
PCT/EP1997/003793 1996-07-16 1997-07-16 Cooling system for an internal combustion engine Ceased WO1998002650A1 (en)

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DE19780704T DE19780704D2 (en) 1996-07-16 1997-07-16 Cooling system for an internal combustion engine
AU37674/97A AU3767497A (en) 1996-07-16 1997-07-16 Cooling system for an internal combustion engine

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DE19628542.9 1996-07-16
DE1996128542 DE19628542A1 (en) 1996-07-16 1996-07-16 Cooling system for an internal combustion engine

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WO1998002650B1 WO1998002650B1 (en) 1998-03-05

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FR2845420B1 (en) * 2002-10-04 2006-01-27 Mark Iv Systemes Moteurs Sa COOLING CIRCUIT COMPRISING A FLOW CONTROL MEMBER
DE10342935B4 (en) * 2003-09-17 2015-04-30 Robert Bosch Gmbh Internal combustion engine with a cooling circuit
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DE19628542A1 (en) 1998-01-22
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