EP2309106B1 - Cooling system - Google Patents

Cooling system Download PDF

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Publication number
EP2309106B1
EP2309106B1 EP09166864.0A EP09166864A EP2309106B1 EP 2309106 B1 EP2309106 B1 EP 2309106B1 EP 09166864 A EP09166864 A EP 09166864A EP 2309106 B1 EP2309106 B1 EP 2309106B1
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EP
European Patent Office
Prior art keywords
coolant
region
block
outlet
thermostat
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.)
Active
Application number
EP09166864.0A
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German (de)
French (fr)
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EP2309106A1 (en
Inventor
Guenther Bartsch
Richard Fritsche
Urban Morawitz
Ingo Lenz
Jeroen Slotman
Bernd Steiner
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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.)
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Publication date
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP09166864.0A priority Critical patent/EP2309106B1/en
Priority to US12/846,339 priority patent/US8061309B2/en
Priority to CN2010202788331U priority patent/CN201802469U/en
Publication of EP2309106A1 publication Critical patent/EP2309106A1/en
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Publication of EP2309106B1 publication Critical patent/EP2309106B1/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
    • 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
    • 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
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/028—Cooling cylinders and cylinder heads in series
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/12—Turbo charger
    • 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
    • F01P2070/04—Details using electrical heating elements

Definitions

  • the invention relates to an internal combustion engine having a coolant circuit which is divided into a cylinder block side coolant region and a cylinder head side coolant region, wherein the cylinder block side coolant region has at least one block thermostat.
  • the EP 1 375 857 A discloses a cooling device for an internal combustion engine.
  • the cooling device has a plurality of cooling cells in a cylinder head, which are separated from each other and can be traversed by a cooling liquid.
  • the cooling device further comprises at least first and second means for controlling the flow rate, wherein the means for controlling the flow rate to at least a first cooling cell of the cylinder head and at least a second cooling cell of the cylinder head are connected.
  • the first and second means are capable of controlling the amount of cooling liquid flowing through each first cooling cell and every second cooling cell, respectively.
  • the DE 10 2005 033 338 A1 relates to an internal combustion engine having a cylinder housing with a plurality of juxtaposed cylinders and a cylinder head.
  • the cylinder head closes off the cylinder housing on a cover surface, a cylinder head gasket being arranged between these two components.
  • a first main liquid space is arranged, which serves the cooling of the cylinder and the coolant transport.
  • a first cooling liquid gap is arranged at or near the top surface of the cylinder housing as a flow connection, which extends in a land area between two cylinders.
  • the cooling in the region of the cylinder land and the cylinder head gasket should be substantially improved.
  • the second cooling liquid gap is in flow communication with a main liquid space in the cylinder head.
  • the EP 0 197 365 A2 discloses a device for the technical production of a cooling device of webs between adjacent, extremely closely cogged cylinders of a cylinder block of an internal combustion engine, the cylinder walls are surrounded on both longitudinal sides and end faces of the cylinder block of a cooling water jacket, with a core for forming the cooling water jacket.
  • the EP 1 217 198 B1 is concerned with a cooling system for cooling a cylinder web, wherein at least one water channel extends exclusively on one side of a vertical axis through the center of the cylinder web.
  • the EP 1 698 770 A1 deals with the split-cooling system, not only cylinder block and cylinder head are controlled separately by coolant technology, but also the cylinder head is divided into separate cooling areas. This is advantageous in that a well controllable and optimized heat balance, in particular of the cylinder head, is achieved, the warm-up behavior of the internal combustion engine being decisively improved.
  • a "split cooling system" is also in the document FR2 905 423 disclosed.
  • the invention has for its object to provide an internal combustion engine of the type mentioned above, the cooling or warm-up behavior is further improved by simple means.
  • the object is achieved by an internal combustion engine having the features of claim 1, wherein the cylinder-side coolant region has an outlet-side cooling region and an inlet-side cooling region, wherein coolant from the inlet-side cooling region can be guided into an outlet housing, in which the outlet-side cooling region opens, wherein a coolant pump outlet is arranged in front of the block thermostat at least one branch, which leads a first partial flow in the direction of the outlet side cooling region of the cylinder head side coolant region, wherein the at least one branch is connected directly to the coolant pump outlet, wherein the flows through the block thermostat flowing coolant flow through the cylinder block side coolant region and from here into the inlet side cooling region of the cylinder head side K wherein the cylinder block-side coolant region communicates with the inlet-side cooling region through a cylinder head gasket, the outlet housing having a control, and wherein the coolant flows flowing out of the exhaust-side and inlet-side cooling regions mix in the flow direction upstream of the control element in the outlet housing two entering
  • the invention is based on the finding that the split-cooling system can be improved in that the cooling system is not only divided into a cylinder block area and a cylinder head area, but also the cylinder head is divided into an outlet-side cooling area and an inlet-side cooling area.
  • skilful cooling strategy so different areas of the engine, especially in its warm-up phase can be controlled by controls. For example, a coolant flow in a first phase has a magnitude of zero, wherein in a second phase, the outlet side of the cylinder head is cooled. Only in a third phase of the cylinder block is cooled. This has proven to be practical proved as the internal combustion engine can be led to the required operating temperature as soon as possible.
  • the coolant flow through the cylinder block is controlled by means of a block thermostat. But flows z. B. during the warm-up phase, no coolant through the cylinder block, because the block thermostat is closed, the resulting heat, such as frictional heat, which is not dissipated, a warming example of lubricant, which is indeed desirable to improve the warm-up properties.
  • the coolant can be warmed up so far that vapor bubbles arise, which collect in the upper region of the cylinder block, and displace there actually existing coolant.
  • the so-called cylinder web or cylinder block web is arranged, which separates adjacent liners from each other.
  • this can be provided with a bore or a slot, wherein the slot can be connected directly to the block water jacket.
  • the vapor bubbles now displace the coolant just in this cooling device within the web or in the upper region of the cylinder block-side coolant region.
  • the block thermostat must be opened in order to avoid displacing the coolant in the upper area. With the solution according to the invention, however, it is possible to keep the block thermostat, especially in the warm-up phase of the internal combustion engine longer closed because the resulting vapor bubbles can be derived from the upper region of the cylinder block.
  • the cylinder-head-side coolant region preferably its inlet-side cooling region is coupled to the block water jacket; because the block water jacket is z. B. via a transfer in the cylinder head, z. B. the cooling slot in cylinder web and z.
  • a crossing for cross-section seen opposite arranged outlet in the cylinder head indirectly in conjunction with the cylinder head side coolant region, or preferably with the inlet side cooling region, so that a derivation of the vapor bubbles in the cylinder head is possible, even if the block thermostat is closed.
  • the resulting vapor bubbles are thus transported into the cylinder head, in particular in the inlet-side cooling region.
  • the cylinder block side cooling area can also by the Cylinder head gasket through with the inlet side coolant directly communicate.
  • a plurality of such compounds may be provided from the cylinder block side cooling region to the inlet side coolant region.
  • Another advantage of the invention lies in the fact that when the block thermostat is open a significantly improved cooling of the cylinder web is achievable.
  • the coolant can follow the previously described path from the block water jacket, via the crossing, the cooling slot and the outlet into the cylinder-head-side coolant region or its inlet-side cooling region.
  • the coolant cools the cylinder head or preferably the inlet side of the cylinder head, and enters the outlet housing without first having contact with the coolant jacket of the outlet-side cooling region or the water jacket there.
  • the coolant for cooling the outlet side flows through z. B. the upper and lower shell of the outlet side cooling region and then also enters the outlet housing, in which mixes the coolant flow from the inlet side cooling region and from the outlet side cooling region.
  • the block thermostat controls the flow of coolant through the cylinder block, wherein the coolant flow is divided before the block thermostat at least in a partial flow, which enters the outlet side cooling region of the cylinder head side coolant region.
  • a control element for example a thermostat, may be arranged in the respective branch to the outlet-side coolant region.
  • a favorable embodiment can be provided to arrange two branches in front of the block thermostat, wherein a partial flow is passed through the first branch to the outlet side coolant region, and wherein the second branch z. B. is connected to a turbocharger. Both branches are preferably connected to the coolant pump outlet. Of course, the second branch may branch off from the first.
  • block thermostat is integrated with its housing in the cylinder block, but can also be designed as a separate component.
  • the outlet housing is designed as a separate housing in which the two partial flows open out of the outlet-side and inlet-side coolant area.
  • the control is arranged in the outlet housing, and preferably designed as an electrically controllable thermostat. In the flow direction behind the control further components of a cooling system of a motor vehicle are arranged.
  • the outlet-side coolant region is arranged in the sense of the invention on the outlet side or exhaust side, wherein the inlet-side coolant region in the meaning of the invention is assigned to the rest of the cylinder head so the respective combustion chamber and the inlet side.
  • FIG. 1 shows an internal combustion engine 1, which has a coolant circuit 2.
  • the coolant circuit 2 is divided into a cylinder block-side coolant region 3 or cylinder block water jacket and into a cylinder head-side coolant region 4 or headwater jacket, so that a split-cooling system is formed.
  • the cylinder-head-side coolant area 4 is further divided by way of example into an outlet-side cooling area 6 and an inlet-side cooling area 7, which of course is not intended to be limiting, wherein a coolant flow in the respective cooling or coolant area 2, 3, 4, 6, 7 is separately controllable ,
  • the coolant circuit 2 according to FIG. 1 a coolant pump 13.
  • a block thermostat 14 is integrated, wherein in front of the block thermostat 14, for example, two branches 16, 17 are arranged.
  • the block thermostat 14 is z. B. executed as a wax element, which allows the coolant flow to pass only in one direction, so that a backflow of the coolant in the closed block thermostats in the direction of the coolant pump 13 is avoided.
  • an electrically controlled block thermostat is conceivable.
  • One of the branches 16 is directly connected to a turbocharger 18, wherein an output connection 19 of the turbocharger 18 opens into a connecting line 21, which opens into a surge tank 25.
  • the connecting line 21 is designed as a vent line, shown dotted and is based on a thermostat 22.
  • the other branch 17 is connected to the outlet side cooling portion 6 of the cylinder head.
  • the block thermostat 14 is meaningfully required for the split-cooling system.
  • the coolant which passes through this block thermostat 14 (arrow 26) flows through the cylinder block-side cooling region 3, passes through the cylinder head gasket 5 into the cylinder head, in particular into the inlet-side cooling region 7, flows through the inlet-side cooling region 7, thereby cooling, inter alia, the inlet side 27 of the internal combustion engine 1, and without first making contact with the coolant (water jacket) flowing in the outlet-side cooling section 6, enters an outlet housing 28 (arrow 29).
  • the coolant for cooling the outlet side 31 of the cylinder head flows through the outlet-side cooling region 6 and also enters the outlet housing 28 (arrow 32).
  • both coolant streams are mixed in front of the thermostat 22.
  • a return of the coolant can then take place, for example via a vent valve 34, an EGR cooler 36, a cabin heater 37, an oil heat exchanger 38 and main cooler 39 back to the coolant pump 13.
  • this return should only be exemplary, with a different order or bypass lines as in FIG. 1 shown are conceivable.
  • the thermostat 22 may also be connected, as shown, to the main radiator 39, which is connected to the coolant pump inlet 23 via a connecting line 41. It is also possible, the thermostat 22 connect via a bypass 42 with the coolant pump inlet 23. As shown, the oil heat exchanger 38 also opens into the coolant pump inlet 23. Dotted is a connection 43 from the main cooler 39 to the expansion tank 22.
  • the thermostat 22 can be electrically controlled, or z. B. be executed as a map thermostat.
  • the housing of the block thermostat 14 is integrated in the cylinder block.
  • the block thermostat 14 may also be designed as a separate component.
  • the coolant pump outlet is connected with the interposition of the block thermostat 14 directly to the cylinder block, or the cylinder block side coolant area 3.
  • the line for supplying the exhaust side 31 of the cylinder head and also the turbocharger 18 (branch 16, 17) is connected directly to thedemittepumpenaustritt.
  • the outlet housing 28, however, is exemplified as a separate component, but may still have an EGR valve with corresponding lines to supply the EGR cooler.
  • the block thermostat 14 can remain closed longer, since possibly forming vapor bubbles from the cylinder block or its upper portion in the cylinder head or in the inlet-side cooling region 7 can be derived.
  • a warm-up behavior of the internal combustion engine is decidedly improved because the block thermostat 14 must be opened only when an exchange of the coolant in the cylinder block side coolant area 3 or in the water jacket is actually required.

Description

Die Erfindung betrifft einen Verbrennungsmotor, der einen Kühlmittelkreislauf aufweist, der in einen zylinderblockseitigen Kühlmittelbereich und in einen zylinderkopfseitigen Kühlmittelbereich aufgeteilt ist, wobei der zylinderblockseitige Kühlmittelbereich zumindest einen Blockthermostaten aufweist.The invention relates to an internal combustion engine having a coolant circuit which is divided into a cylinder block side coolant region and a cylinder head side coolant region, wherein the cylinder block side coolant region has at least one block thermostat.

Die EP 1 375 857 A offenbart eine Kühlvorrichtung für einen Verbrennungsmotor. Die Kühlvorrichtung weist mehrere Kühlzellen in einem Zylinderkopf auf, die voneinander getrennt sind und von einer Kühlflüssigkeit durchflossen werden können. Die Kühlvorrichtung umfaßt weiter mindestens erste und zweite Mittel zur Regelung der Durchflußmenge, wobei die Mittel zur Regelung der Durchflußmenge an mindestens eine erste Kühlzelle des Zylinderkopfes und an mindestens eine zweite Kühlzelle des Zylinderkopfes angeschlossen sind. Die ersten und zweiten Mittel sind in der Lage, die Menge an Kühlflüssigkeit zu regeln, die jeweils durch jede erste Kühlzelle und durch jede zweite Kühlzelle fließt.The EP 1 375 857 A discloses a cooling device for an internal combustion engine. The cooling device has a plurality of cooling cells in a cylinder head, which are separated from each other and can be traversed by a cooling liquid. The cooling device further comprises at least first and second means for controlling the flow rate, wherein the means for controlling the flow rate to at least a first cooling cell of the cylinder head and at least a second cooling cell of the cylinder head are connected. The first and second means are capable of controlling the amount of cooling liquid flowing through each first cooling cell and every second cooling cell, respectively.

Die DE 10 2005 033 338 A1 betrifft eine Brennkraftmaschine, die ein Zylindergehäuse mit mehreren nebeneinander angeordneten Zylindern und einen Zylinderkopf aufweist. Der Zylinderkopf schließt das Zylindergehäuse an einer Deckfläche ab, wobei zwischen diesen beiden Bauteilen eine Zylinderkopfdichtung angeordnet ist. Jeweils rechts und links der Zylinderreihe ist ein erster Hauptflüssigkeitsraum angeordnet, welcher der Kühlung der Zylinder und dem Kühlmitteltransport dient. Zwischen den beiden Seiten des ersten Hauptflüssigkeitsraumes ist an oder nahe der Deckfläche des Zylindergehäuses als Strömungsverbindung ein erster Kühlflüssigkeitszwischenraum angeordnet, der in einem Stegbereich zwischen zwei Zylindern verläuft. Durch einen zweiten Kühlflüssigkeitszwischenraum oberhalb der Zylinderkopfdichtung im Zylinderkopf, der korrespondierend zum ersten Kühlflüssigkeitszwischenraum ausgeführt und über mindestens eine Öffnung mit diesem verbunden ist, soll die Kühlung im Bereich des Zylindersteges und der Zylinderkopfdichtung wesentlich verbessert werden. Hierbei steht der zweite Kühlflüssigkeitszwischenraum mit einem Hauptflüssigkeitsraum im Zylinderkopf in Strömungsverbindung.The DE 10 2005 033 338 A1 relates to an internal combustion engine having a cylinder housing with a plurality of juxtaposed cylinders and a cylinder head. The cylinder head closes off the cylinder housing on a cover surface, a cylinder head gasket being arranged between these two components. In each case to the right and left of the row of cylinders, a first main liquid space is arranged, which serves the cooling of the cylinder and the coolant transport. Between the two sides of the first main liquid space a first cooling liquid gap is arranged at or near the top surface of the cylinder housing as a flow connection, which extends in a land area between two cylinders. By a second cooling liquid gap above the cylinder head gasket in the cylinder head, which is executed corresponding to the first cooling liquid gap and connected via at least one opening with this, the cooling in the region of the cylinder land and the cylinder head gasket should be substantially improved. Here, the second cooling liquid gap is in flow communication with a main liquid space in the cylinder head.

Die EP 0 197 365 A2 offenbart eine Vorrichtung zur gießtechnischen Herstellung einer Kühleinrichtung von Stegen zwischen benachbarten, extrem engständig zusammengegossenen Zylindern eines Zylinderblocks einer Brennkraftmaschine, deren Zylinderwände auf beiden Längsseiten und Stirnseiten des Zylinderblocks von einem Kühlwassermantel umgeben sind, mit einem Kern zur Bildung des Kühlwassermantels. Es sind separate Kerne zur Bildung von Kühlwasserkanälen in den Stegen vorgesehen, die in Höhe des Zylinderbrennraumes die beiden gegenüber liegenden Längsseiten des Mantelkernes überbrücken und entweder in diesen beidendig eingepaßt sind oder in einem oberen Sohlenkern fixiert sind.The EP 0 197 365 A2 discloses a device for the technical production of a cooling device of webs between adjacent, extremely closely cogged cylinders of a cylinder block of an internal combustion engine, the cylinder walls are surrounded on both longitudinal sides and end faces of the cylinder block of a cooling water jacket, with a core for forming the cooling water jacket. There are separate cores for the formation of cooling water channels provided in the webs, which bridge the height of the cylinder combustion chamber, the two opposite longitudinal sides of the shell core and are either fitted at both ends or fixed in an upper soleplate.

Die EP 1 217 198 B1 befaßt sich mit einem Kühlsystem für die Kühlung eines Zylindersteges, bei dem sich mindestens ein Wasserkanal ausschließlich auf einer Seite einer vertikalen Achse durch das Zentrum des Zylindersteges erstreckt.The EP 1 217 198 B1 is concerned with a cooling system for cooling a cylinder web, wherein at least one water channel extends exclusively on one side of a vertical axis through the center of the cylinder web.

Bekannt ist, den Motorblock und den Zylinderkopf des Verbrennungsmotors jeweils getrennt voneinander mit einem Kühlmittel eines Kühlmittelkreislaufs durchströmen zu lassen. Auf diese Weise können der Zylinderkopf, der thermisch vor allem durch die Brennraum- und Kanalwände mit der Verbrennungsluft gekoppelt ist, und der Motorblock, der thermisch vor allem mit den Reibstellen gekoppelt ist, unterschiedlich gekühlt werden. Durch ein so genanntes "Split-Cooling-System" (getrennter Kühlmittelkreislauf) soll erreicht werden, daß in der Warmlaufphase des Verbrennungsmotors der Zylinderkopf gekühlt wird, wobei der Motorblock zunächst noch nicht gekühlt werden soll, so daß der Motorblock schneller auf die erforderliche Betriebstemperatur geführt werden kann.It is known to allow the engine block and the cylinder head of the internal combustion engine to flow separately from each other with a coolant of a coolant circuit. In this way, the cylinder head, which is thermally coupled primarily by the combustion chamber and channel walls with the combustion air, and the engine block, which is thermally coupled above all with the friction points, can be cooled differently. By a so-called "split-cooling system" (separate coolant circuit) is to be achieved that in the warm-up phase of the engine, the cylinder head is cooled, the engine block is not yet to be cooled, so that the engine block out faster to the required operating temperature can be.

Die EP 1 698 770 A1 befaßt sich mit dem Split-Cooling-System, wobei nicht nur Zylinderblock und Zylinderkopf kühlmitteltechnisch getrennt ansteuerbar sind, sondern zusätzlich der Zylinderkopf in getrennte Kühlbereiche unterteilt ist. Dies ist dahingehend vorteilhaft, als ein gut regelbarer und optimierter Wärmehaushalt, insbesondere des Zylinderkopfes, erreicht wird, wobei das Warmlaufverhalten des Verbrennungsmotors entschieden verbessert wird. Ein "Split-Cooling-System" wird auch im Dokument FR2 905 423 offenbart. Der Erfindung liegt die Aufgabe zugrunde, einen Verbrennungsmotor der Eingangs genannten Art zur Verfügung zu stellen, dessen Kühlung bzw. Warmlaufverhalten mit einfachen Mitteln weiter verbessert wird.The EP 1 698 770 A1 deals with the split-cooling system, not only cylinder block and cylinder head are controlled separately by coolant technology, but also the cylinder head is divided into separate cooling areas. This is advantageous in that a well controllable and optimized heat balance, in particular of the cylinder head, is achieved, the warm-up behavior of the internal combustion engine being decisively improved. A "split cooling system" is also in the document FR2 905 423 disclosed. The invention has for its object to provide an internal combustion engine of the type mentioned above, the cooling or warm-up behavior is further improved by simple means.

Erfindungsgemäß wird die Aufgabe gelöst durch einen Verbrennungsmotor mit den Merkmalen des Anspruchs 1, wobei der zylinderkopfseitige Kühlmittelbereich einen auslaßseitigen Kühlbereich und einen einlaßseitigen Kühlbereich aufweist, wobei Kühlmittel aus dem einlaßseitigen Kühlbereich in ein Auslaßgehäuse führbar ist, in dem der auslaßseitige Kühlbereich mündet, wobei ein Kühlmittelpumpenaustritt über den Blockthermostaten mit dem zylinderblockseitigen Kühlmittelbereich verbunden ist, und wobei vor dem Blockthermostaten zumindest ein Abzweig angeordnet ist, der einen ersten Teilstrom in Richtung zu dem auslaßseitigen Kühlbereich des zylinderkopfseitigen Kühlmittelbereichs führt, wobei der zumindest eine Abzweig direkt mit dem Kühlmittelpumpenaustritt verbunden ist, wobei der durch den Blockthermostaten strömende Kühlmittelstrom durch den zylinderblockseitigen Kühlmittelbereich strömt und von hier in den einlaßseitigen Kühlbereich des zylinderkopfseitigen Kühlmittelbereiches eintritt, wobei der zylinderblockseitige Kühlmittelbereich durch eine Zylinderkopfdichtung hindurch mit dem einlaßseitigen Kühlbereich in Verbindung steht, wobei das Auslaßgehäuse ein Steuerelement aufweist, und wobei sich die aus dem auslaßseitigen und einlaßseitigen Kühlbereich ausströmenden Kühlmittelströmungen in Strömungsrichtung vor dem Steuerelement in dem Auslaßgehäuse vermischen, wobei die beiden in das Auslaßgehäuse eintretenden Kühlmittelströmungen bis zu deren Vermischung kontaktfrei sind.According to the invention, the object is achieved by an internal combustion engine having the features of claim 1, wherein the cylinder-side coolant region has an outlet-side cooling region and an inlet-side cooling region, wherein coolant from the inlet-side cooling region can be guided into an outlet housing, in which the outlet-side cooling region opens, wherein a coolant pump outlet is arranged in front of the block thermostat at least one branch, which leads a first partial flow in the direction of the outlet side cooling region of the cylinder head side coolant region, wherein the at least one branch is connected directly to the coolant pump outlet, wherein the flows through the block thermostat flowing coolant flow through the cylinder block side coolant region and from here into the inlet side cooling region of the cylinder head side K wherein the cylinder block-side coolant region communicates with the inlet-side cooling region through a cylinder head gasket, the outlet housing having a control, and wherein the coolant flows flowing out of the exhaust-side and inlet-side cooling regions mix in the flow direction upstream of the control element in the outlet housing two entering into the outlet housing coolant flows are free of contact until their mixing.

Der Erfindung liegt die Erkenntnis zugrunde, dass das Split-Cooling-System dahingehend verbessert werden kann, als das Kühlsystem nicht nur in einen Zylinderblockbereich und einen Zylinderkopfbereich aufgeteilt wird, sondern der Zylinderkopf zudem in einen auslaßseitigen Kühlbereich und einen einlaßseitigen Kühlbereich unterteilt wird. Mittels geschickter Kühlstrategie können so unterschiedliche Bereiche des Verbrennungsmotors, insbesondere in seiner Warmlaufphase über Steuerelemente angesteuert werden. Beispielsweise weist eine Kühlmittelströmung in einer ersten Phase einen Betrag von null auf, wobei in einer zweiten Phase die Auslaßseite des Zylinderkopfes gekühlt wird. Erst in einer dritten Phase wird der Zylinderblock gekühlt. Dies hat sich dahingehend als praktisch erwiesen, als der Verbrennungsmotor schnellstmöglich auf die erforderliche Betriebstemperatur geführt werden kann.The invention is based on the finding that the split-cooling system can be improved in that the cooling system is not only divided into a cylinder block area and a cylinder head area, but also the cylinder head is divided into an outlet-side cooling area and an inlet-side cooling area. Using skilful cooling strategy so different areas of the engine, especially in its warm-up phase can be controlled by controls. For example, a coolant flow in a first phase has a magnitude of zero, wherein in a second phase, the outlet side of the cylinder head is cooled. Only in a third phase of the cylinder block is cooled. This has proven to be practical proved as the internal combustion engine can be led to the required operating temperature as soon as possible.

Üblicherweise wird der Kühlmittelstrom durch den Zylinderblock dabei mittels eines Blockthermostaten gesteuert. Strömt aber z. B. während der Warmlaufphase kein Kühlmittel durch den Zylinderblock, weil der Blockthermostat geschlossen ist, bewirkt die entstehende Wärme, beispielsweise Reibungswärme, welche nicht abgeführt wird, eine Aufwärmung beispielsweise von Schmiermittel, was ja durchaus zur Verbesserung der Warmlaufeigenschaften gewünscht ist. Allerdings kann das Kühlmittel dabei so weit aufgewärmt werden, dass Dampfblasen entstehen, welche sich im oberen Bereich des Zylinderblocks sammeln, und das dort eigentlich vorhandene Kühlmittel verdrängen. Zwischen den Laufbüchsen der Zylinder ist der so genannte Zylindersteg bzw. Zylinderblocksteg angeordnet, welcher benachbarte Laufbüchsen von einander trennt. Zur besseren Kühlung kann dieser mit einer Bohrung oder einem Schlitz versehen sein, wobei der Schlitz direkt mit dem Blockwassermantel verbunden sein kann. Die Dampfblasen verdrängen das Kühlmittel nun gerade in dieser Kühlvorrichtung innerhalb des Steges bzw. im oberen Bereich des zylinderblockseitigen Kühlmittelbereiches. Damit keine Temperatur bedingte Schäden entstehen, muß das Blockthermostat geöffnet werden, um ein Verdrängen des Kühlmittels im oberen Bereich zu vermeiden. Mit der erfindungsgemäßen Lösung dagegen ist es möglich, den Blockthermostat, insbesondere in der Warmlaufphase des Verbrennungsmotors länger geschlossen zu halten, da die entstehenden Dampfblasen aus dem oberen Bereich des Zylinderblocks abgeleitet werden können. Dies wird vorteilhaft dadurch erreicht, dass der zylinderkopfseitige Kühlmittelbereich, bevorzugt dessen einlaßseitiger Kühlbereich mit dem Blockwassermantel gekoppelt ist; denn der Blockwassermantel steht z. B. über einen Übertritt im Zylinderkopf, z. B. den Kühlschlitz in Zylindersteg und z. B. einen zum Übertritt im Querschnitt gesehen gegenüberliegend angeordneten Auslauf im Zylinderkopf indirekt in Verbindung mit dem zylinderkopfseitigen Kühlmittelbereich, bzw. bevorzugt mit dessen einlaßseitigen Kühlbereich, so dass ein Ableiten der Dampfblasen in den Zylinderkopf möglich wird, auch wenn der Blockthermostat geschlossen ist. Die entstehenden Dampfblasen werden also in den Zylinderkopf, insbesondere in den einlaßseitigen Kühlbereich transportiert. Natürlich kann der zylinderblockseitige Kühlbereich auch durch die Zylinderkopfdichtung hindurch mit dem einlaßseitigen Kühlmittelbereich direkt in Verbindung stehen. Selbstverständlich können mehrere derartiger Verbindungen vom zylinderblockseitigen Kühlbereich zum einlaßseitigen Kühlmittelbereich vorgesehen sein.Usually, the coolant flow through the cylinder block is controlled by means of a block thermostat. But flows z. B. during the warm-up phase, no coolant through the cylinder block, because the block thermostat is closed, the resulting heat, such as frictional heat, which is not dissipated, a warming example of lubricant, which is indeed desirable to improve the warm-up properties. However, the coolant can be warmed up so far that vapor bubbles arise, which collect in the upper region of the cylinder block, and displace there actually existing coolant. Between the liners of the cylinder, the so-called cylinder web or cylinder block web is arranged, which separates adjacent liners from each other. For better cooling, this can be provided with a bore or a slot, wherein the slot can be connected directly to the block water jacket. The vapor bubbles now displace the coolant just in this cooling device within the web or in the upper region of the cylinder block-side coolant region. To prevent damage due to temperature, the block thermostat must be opened in order to avoid displacing the coolant in the upper area. With the solution according to the invention, however, it is possible to keep the block thermostat, especially in the warm-up phase of the internal combustion engine longer closed because the resulting vapor bubbles can be derived from the upper region of the cylinder block. This is advantageously achieved in that the cylinder-head-side coolant region, preferably its inlet-side cooling region is coupled to the block water jacket; because the block water jacket is z. B. via a transfer in the cylinder head, z. B. the cooling slot in cylinder web and z. Example, a crossing for cross-section seen opposite arranged outlet in the cylinder head indirectly in conjunction with the cylinder head side coolant region, or preferably with the inlet side cooling region, so that a derivation of the vapor bubbles in the cylinder head is possible, even if the block thermostat is closed. The resulting vapor bubbles are thus transported into the cylinder head, in particular in the inlet-side cooling region. Of course, the cylinder block side cooling area can also by the Cylinder head gasket through with the inlet side coolant directly communicate. Of course, a plurality of such compounds may be provided from the cylinder block side cooling region to the inlet side coolant region.

Ein weiterer Vorteil der Erfindung ist darin zu sehen, dass bei geöffnetem Blockthermostat eine wesentlich verbesserte Kühlung des Zylindersteges erreichbar ist. Hierbei kann das Kühlmittel dabei dem zuvor beschriebenen Pfad aus dem Blockwassermantel, über den Übertritt, den Kühlschlitz und den Auslauf in den zylinderkopfseitigen Kühlmittelbereich bzw. dessen einlaßseitigem Kühlbereich folgen. Dabei kühlt das Kühlmittel den Zylinderkopf bzw. bevorzugt die Einlaßseite des Zylinderkopfs, und tritt in das Auslaßgehäuse ohne vorher Kontakt mit dem Kühlmittelmantel des auslaßseitigen Kühlbereiches bzw. dem dortigen Wassermantel zu haben.Another advantage of the invention lies in the fact that when the block thermostat is open a significantly improved cooling of the cylinder web is achievable. In this case, the coolant can follow the previously described path from the block water jacket, via the crossing, the cooling slot and the outlet into the cylinder-head-side coolant region or its inlet-side cooling region. In this case, the coolant cools the cylinder head or preferably the inlet side of the cylinder head, and enters the outlet housing without first having contact with the coolant jacket of the outlet-side cooling region or the water jacket there.

Das Kühlmittel zur Kühlung der Auslaßseite durchströmt z. B. die Ober- und Unterschale des auslaßseitigen Kühlbereiches und tritt dann ebenfalls in das Auslaßgehäuse ein, in dem sich der Kühlmittelstrom aus dem einlaßseitigen Kühlbereich und aus dem auslaßseitigen Kühlbereich vermischt.The coolant for cooling the outlet side flows through z. B. the upper and lower shell of the outlet side cooling region and then also enters the outlet housing, in which mixes the coolant flow from the inlet side cooling region and from the outlet side cooling region.

Insofern ist vorteilhaft vorgesehen, dass der Blockthermostat den Kühlmittelstrom durch den Zylinderblock steuert, wobei der Kühlmittelstrom vor dem Blockthermostaten zumindest in einen Teilstrom aufgeteilt wird, der in den auslaßseitigen Kühlbereich des zylinderkopfseitigen Kühlmittelbereiches eintritt. Natürlich kann in dem betreffenden Abzweig zum auslaßseitigen Kühlmittelbereich ein Steuerelement, zum Beispiel ein Thermostat angeordnet sein.In this respect, it is advantageously provided that the block thermostat controls the flow of coolant through the cylinder block, wherein the coolant flow is divided before the block thermostat at least in a partial flow, which enters the outlet side cooling region of the cylinder head side coolant region. Of course, a control element, for example a thermostat, may be arranged in the respective branch to the outlet-side coolant region.

In günstiger Ausführung kann vorgesehen sein, vor dem Blockthermostaten zwei Abzweige anzuordnen, wobei ein Teilstrom über den ersten Abzweig zum auslaßseitigen Kühlmittelbereich geführt wird, und wobei der zweite Abzweig z. B. mit einem Turbolader verbunden ist. Beide Abzweige sind bevorzugt mit dem Kühlmittelpumpenaustritt verbunden. Natürlich kann der zweite Abzweig aus dem ersten abzweigen.In a favorable embodiment can be provided to arrange two branches in front of the block thermostat, wherein a partial flow is passed through the first branch to the outlet side coolant region, and wherein the second branch z. B. is connected to a turbocharger. Both branches are preferably connected to the coolant pump outlet. Of course, the second branch may branch off from the first.

In weiter vorteilhafter Ausgestaltung ist der Blockthermostat mit seinem Gehäuse in dem Zylinderblock integriert, kann aber auch als separates Bauteil ausgeführt sein.In a further advantageous embodiment of the block thermostat is integrated with its housing in the cylinder block, but can also be designed as a separate component.

Zweckmäßig ist, wenn das Auslaßgehäuse als separates Gehäuse ausgeführt ist, in welchem die beiden Teilströme aus dem auslaßseitigen und einlaßseitigen Kühlmittelbereich münden. Das Steuerelement ist in dem Auslaßgehäuse angeordnet, und bevorzugt als elektrisch steuerbares Thermostat ausgeführt. In Strömungsrichtung hinter dem Steuerelement sind weitere Komponenten eines Kühlsystems eines Kraftfahrzeuges angeordnet.It is expedient if the outlet housing is designed as a separate housing in which the two partial flows open out of the outlet-side and inlet-side coolant area. The control is arranged in the outlet housing, and preferably designed as an electrically controllable thermostat. In the flow direction behind the control further components of a cooling system of a motor vehicle are arranged.

Der auslaßseitige Kühlmittelbereich ist im Sinne der Erfindung auslaßseitig bzw. abgasseitig angeordnet, wobei der einlaßseitige Kühlmittelbereich im Sinne der Erfindung dem Rest des Zylinderkopfes also dem jeweiligen Brennraum und der Einlaßseite zugeordnet ist.The outlet-side coolant region is arranged in the sense of the invention on the outlet side or exhaust side, wherein the inlet-side coolant region in the meaning of the invention is assigned to the rest of the cylinder head so the respective combustion chamber and the inlet side.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen und der folgenden Figurenbeschreibung offenbart. Es zeigt die einzige

Fig. 1
einen beispielhaften Kühlmittelkreislauf eines Verbrennungsmotors,
Further advantageous embodiments of the invention are disclosed in the subclaims and the following description of the figures. It shows the only one
Fig. 1
an exemplary coolant circuit of an internal combustion engine,

Figur 1 zeigt einen Verbrennungsmotor 1, der einen Kühlmittelkreislauf 2 aufweist. Der Kühlmittelkreislauf 2 ist in einen zylinderblockseitigen Kühlmittelbereich 3 bzw. Zylinderblockwassermantel und in einen zylinderkopfseitigen Kühlmittelbereich 4 bzw. Kopfwassermantel aufgeteilt, so dass ein Split-Cooling-System gebildet ist. Der zylinderkopfseitige Kühlmittelbereich 4 ist beispielhaft weiter in einen auslaßseitigen Kühlbereich 6 und in einen einlaßseitigen Kühlbereich 7 aufgeteilt, was natürlich nicht beschränkend wirken soll, wobei eine Kühlmittelströmung in dem jeweiligen Kühl- bzw. Kühlmittelbereich 2, 3, 4, 6, 7 separat steuerbar ist. FIG. 1 shows an internal combustion engine 1, which has a coolant circuit 2. The coolant circuit 2 is divided into a cylinder block-side coolant region 3 or cylinder block water jacket and into a cylinder head-side coolant region 4 or headwater jacket, so that a split-cooling system is formed. The cylinder-head-side coolant area 4 is further divided by way of example into an outlet-side cooling area 6 and an inlet-side cooling area 7, which of course is not intended to be limiting, wherein a coolant flow in the respective cooling or coolant area 2, 3, 4, 6, 7 is separately controllable ,

Zunächst weist der Kühlmittelkreislauf 2 gemäß Figur 1 eine Kühlmittelpumpe 13 auf. In dem Zylinderblock ist ein Blockthermostat 14 integriert, wobei vor dem Blockthermostat 14 beispielhaft zwei Abzweige 16, 17 angeordnet sind. Der Blockthermostat 14 ist z. B. als Wachselement ausgeführt, welches den Kühlmittelstrom nur in einer Richtung passieren läßt, so dass ein Zurückströmen des Kühlmittels bei geschlossenem Blockthermostaten in Richtung zur Kühlmittelpumpe 13 vermieden wird. Natürlich ist auch ein elektrisch gesteuertes Blockthermostat denkbar. Einer der Abzweige 16 ist direkt mit einem Turbolader 18 verbunden, wobei eine Ausgangsverbindung 19 des Turboladers 18 in eine Verbindungsleitung 21 mündet, welche in einem Ausgleichsbehälter 25 mündet. Die Verbindungsleitung 21 ist als Entlüftungsleitung ausgeführt, punktiert dargestellt und geht von einem Thermostaten 22 aus.First, the coolant circuit 2 according to FIG. 1 a coolant pump 13. In the cylinder block, a block thermostat 14 is integrated, wherein in front of the block thermostat 14, for example, two branches 16, 17 are arranged. The block thermostat 14 is z. B. executed as a wax element, which allows the coolant flow to pass only in one direction, so that a backflow of the coolant in the closed block thermostats in the direction of the coolant pump 13 is avoided. Of course, an electrically controlled block thermostat is conceivable. One of the branches 16 is directly connected to a turbocharger 18, wherein an output connection 19 of the turbocharger 18 opens into a connecting line 21, which opens into a surge tank 25. The connecting line 21 is designed as a vent line, shown dotted and is based on a thermostat 22.

Der andere Abzweig 17 ist mit dem auslaßseitigen Kühlbereich 6 des Zylinderkopfes verbunden.The other branch 17 is connected to the outlet side cooling portion 6 of the cylinder head.

Der Blockthermostat 14 ist sinnvoller Weise für das Split-Cooling-System erforderlich. Das Kühlmittel, welches diesen Blockthermostat 14 passiert (Pfeil 26) durchströmt den zylinderblockseitigen Kühlbereich 3, tritt durch die Zylinderkopfdichtung 5 hindurch in den Zylinderkopf, insbesondere in den einlaßseitigen Kühlbereich 7 über, strömt durch den einlaßseitigen Kühlbereich 7, kühlt dabei unter anderem die Einlaßseite 27 des Verbrennungsmotors 1 und tritt, ohne vorher Kontakt mit dem in dem auslaßseitigen Kühlbereich 6 strömenden Kühlmittel (Wassermantel) zu haben, in ein Auslaßgehäuse 28 ein (Pfeil 29).The block thermostat 14 is meaningfully required for the split-cooling system. The coolant which passes through this block thermostat 14 (arrow 26) flows through the cylinder block-side cooling region 3, passes through the cylinder head gasket 5 into the cylinder head, in particular into the inlet-side cooling region 7, flows through the inlet-side cooling region 7, thereby cooling, inter alia, the inlet side 27 of the internal combustion engine 1, and without first making contact with the coolant (water jacket) flowing in the outlet-side cooling section 6, enters an outlet housing 28 (arrow 29).

Das Kühlmittel zur Kühlung der Auslaßseite 31 des Zylinderkopfes durchströmt den auslaßseitigen Kühlbereich 6 und tritt ebenfalls in das Auslaßgehäuse 28 ein (Pfeil 32) ein.The coolant for cooling the outlet side 31 of the cylinder head flows through the outlet-side cooling region 6 and also enters the outlet housing 28 (arrow 32).

In dem bevorzugt separat ausgeführten Auslaßgehäuse 28 werden beide Kühlmittelströme vor dem Thermostaten 22 vermischt. Ein Rücklauf des Kühlmittels kann dann beispielsweise über ein Entlüftungsventil 34, einen AGR-Kühler 36, eine Kabinenheizung 37, einen Ölwärmetauscher 38 bzw. Hauptkühler 39 zurück zur Kühlmittelpumpe 13 erfolgen. Selbstverständlich soll dieser Rücklauf nur beispielhaft sein, wobei eine andere Reihenfolge oder Umgehungsleitungen wie in Figur 1 dargestellt denkbar sind.In the preferably separately executed outlet housing 28, both coolant streams are mixed in front of the thermostat 22. A return of the coolant can then take place, for example via a vent valve 34, an EGR cooler 36, a cabin heater 37, an oil heat exchanger 38 and main cooler 39 back to the coolant pump 13. Of course, this return should only be exemplary, with a different order or bypass lines as in FIG. 1 shown are conceivable.

Beispielsweise kann das Thermostat 22 auch, wie dargestellt, mit dem Hauptkühler 39 verbunden sein, welcher über eine Verbindungsleitung 41 mit dem Kühlmittelpumpeneinlauf 23 verbunden ist. Möglich ist auch, den Thermostaten 22 über einen Bypaß 42 mit dem Kühlmittelpumpeneinlauf 23 zu verbinden. Wie dargestellt mündet auch der Ölwärmetauscher 38 in dem Kühlmittelpumpeneinlauf 23. Punktiert ist eine Verbindung 43 vom Hauptkühler 39 zum Ausgleichsbehälter 22 dargestellt. Das Thermostat 22 kann elektrisch angesteuert werden, oder kann z. B. als Kennfeldthermostat ausgeführt sein.For example, the thermostat 22 may also be connected, as shown, to the main radiator 39, which is connected to the coolant pump inlet 23 via a connecting line 41. It is also possible, the thermostat 22 connect via a bypass 42 with the coolant pump inlet 23. As shown, the oil heat exchanger 38 also opens into the coolant pump inlet 23. Dotted is a connection 43 from the main cooler 39 to the expansion tank 22. The thermostat 22 can be electrically controlled, or z. B. be executed as a map thermostat.

Wie dargestellt ist das Gehäuse des Blockthermostaten 14 im Zylinderblock integriert. Das Blockthermostat 14 kann aber auch als separates Bauteil ausgeführt sein. Vorteilhaft ist der Kühlmittelpumpenaustritt unter Zwischenschaltung des Blockthermostaten 14 direkt mit dem Zylinderblock, bzw. dem zylinderblockseitigen Kühlmittelbereich 3 verbunden. Ebenfalls die Leitung zur Versorgung der Auslaßseite 31 des Zylinderkopfes und auch des Turboladers 18 (Abzweig 16, 17) ist direkt mit dem Kühlmittepumpenaustritt verbunden. Das Auslaßgehäuse 28 dagegen ist beispielhaft als separates Bauteil ausgeführt, kann aber noch ein AGR-Ventil mit entsprechenden Leitungen aufweisen, um den AGR-Kühler zu versorgen.As shown, the housing of the block thermostat 14 is integrated in the cylinder block. The block thermostat 14 may also be designed as a separate component. Advantageously, the coolant pump outlet is connected with the interposition of the block thermostat 14 directly to the cylinder block, or the cylinder block side coolant area 3. Also, the line for supplying the exhaust side 31 of the cylinder head and also the turbocharger 18 (branch 16, 17) is connected directly to the Kühlmittepumpenaustritt. The outlet housing 28, however, is exemplified as a separate component, but may still have an EGR valve with corresponding lines to supply the EGR cooler.

Insbesondere in einer Warmlaufphase des Verbrennungsmotors 1 kann der Blockthermostat 14 länger geschlossen bleiben, da sich möglicherweise bildende Dampfblasen aus dem Zylinderblock bzw. seinem oberen Bereich in den Zylinderkopf bzw. in den einlaßseitigen Kühlbereich 7 ableiten lassen. Damit ist ein Warmlaufverhalten des Verbrennungsmotors entschieden verbessert, da das Blockthermostat 14 erst geöffnet werden muß, wenn tatsächlich ein Austausch des Kühlmittels im zylinderblockseitigen Kühlmittelbereich 3 bzw. im Blockwassermantel erforderlich ist.Especially in a warm-up phase of the internal combustion engine 1, the block thermostat 14 can remain closed longer, since possibly forming vapor bubbles from the cylinder block or its upper portion in the cylinder head or in the inlet-side cooling region 7 can be derived. Thus, a warm-up behavior of the internal combustion engine is decidedly improved because the block thermostat 14 must be opened only when an exchange of the coolant in the cylinder block side coolant area 3 or in the water jacket is actually required.

Claims (6)

  1. Internal combustion engine, which has a coolant circuit (2) which is divided into a cylinder block-side coolant region (3) and a cylinder head-side coolant region (4), the cylinder block-side coolant region having at least one block thermostat (14), wherein the cylinder head-side coolant region (4) has an outlet-side cooling region (6) and an inlet-side cooling region (7), it being possible for coolant to be routed out of the inlet-side cooling region (7) into an outlet housing (28), in which the outlet-side cooling region (6) opens, and at least one branch (17) which routes a first part flow in the direction of the outlet-side cooling region (6) of the cylinder head-side coolant region (4) being arranged in front of the block thermostat (14), the at least one branch (17) being connected directly to the coolant pump outlet, the cylinder block-side coolant region (3) being connected through a cylinder head gasket (5) to the inlet-side cooling region (7), the outlet housing (28) having a control element (22),
    characterized in that
    a coolant pump outlet is connected via the block thermostat (14) to the cylinder block-side coolant region (3), the coolant flow which flows through the block thermostat (14) into the cylinder block-side coolant region (3) flowing through the cylinder block-side coolant region (3) and, from here, entering the inlet-side cooling region (7) of the cylinder head-side coolant region (4), and the coolant flows which flow out of the outlet-side and inlet-side cooling regions (6 and 7) into the outlet housing (28) being mixed in the flow direction in front of the control element (22) in the outlet housing (28), the two coolant flows which enter the outlet housing (28) not being in contact until they are mixed.
  2. Internal combustion engine according to Claim 1,
    characterized in that
    the block thermostat (14) controls the coolant flow through the cylinder block-side coolant region (3).
  3. Internal combustion engine according to Claim 1 or 2,
    characterized in that
    the block thermostat (14) is integrated into the cylinder block, or wherein the block thermostat (14) is configured as a separate component.
  4. Internal combustion engine according to one of the preceding claims,
    characterized in that
    two branches (16, 17) are arranged in front of the block thermostat (14), of which the branch (16) is connected to a turbocharger (18), both branches (16, 17) being connected to the coolant pump outlet.
  5. Internal combustion engine according to one of the preceding claims,
    characterized in that
    the outlet housing (28) is configured as a separate housing, in which the coolant coming out of the inlet-side cooling region (7) and the coolant coming out of the outlet-side cooling region (6) are mixed in front of the control element (22).
  6. Internal combustion engine according to one of the preceding claims,
    characterized in that
    the control element (22) is configured as a thermostat (22), preferably as an electrically controllable thermostat (22).
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DE102021111729A1 (en) 2020-05-05 2021-11-11 Kirpart Otomoti̇v Parçalari Sanayi̇ Ve Ti̇caret A.Ş. A VALVE STRUCTURE FOR DETERMINING THE THERMOSTAT OUTLET TEMPERATURE OF THE THERMOSTAT ELEMENT AND A RELATED THERMOSTAT ARRANGEMENT

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