EP1280985B1 - Cooling circuit for a multi-cylinder internal combustion engine - Google Patents

Cooling circuit for a multi-cylinder internal combustion engine Download PDF

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Publication number
EP1280985B1
EP1280985B1 EP01927830A EP01927830A EP1280985B1 EP 1280985 B1 EP1280985 B1 EP 1280985B1 EP 01927830 A EP01927830 A EP 01927830A EP 01927830 A EP01927830 A EP 01927830A EP 1280985 B1 EP1280985 B1 EP 1280985B1
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EP
European Patent Office
Prior art keywords
cooling
cylinder
coolant
circuit arrangement
arrangement according
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Expired - Lifetime
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EP01927830A
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German (de)
French (fr)
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EP1280985A1 (en
Inventor
Manfred Batzill
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/22Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/10Pumping liquid coolant; Arrangements of coolant pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B2075/1804Number of cylinders
    • F02B2075/1832Number of cylinders eight

Definitions

  • the invention relates to a cooling circuit arrangement for an internal combustion engine according to the features of the preamble of claim 1.
  • Such an arrangement is known, for example, from EP 0 219 351 A2, in which the cooling jackets integrated in the cylinder banks are supplied with cooling fluid by a coolant pump which is arranged on one end side of the internal combustion engine between the cylinder banks oriented in the form of a V. On the other end face of the internal combustion engine, a collecting line for the flowing back from the cylinders and a radiator coolant is arranged. Due to the multi-port manifold the actual dimensions of the engine are exceeded, so that in particular in a longitudinal installation of the engine in the vehicle space is claimed, which is no longer available to the passenger compartment.
  • the invention is based on the object to provide a constructive arrangement for a cooling circuit in an internal combustion engine with V-shaped cylinders, in which the existing open spaces are utilized, so that the actual dimensions of the internal combustion engine are not exceeded.
  • control unit is arranged together with the coolant pump in the installed state of the internal combustion engine in the vehicle seen in the direction of travel on the front end side of the internal combustion engine, it is easily accessible for maintenance and repair work.
  • the lower part of the two of a unit existing return chambers is poured in an advantageous manner together with the housing of the coolant pump in the crankcase upper part.
  • the V8 engine shown in Figure 1 consists of a crankcase lower part 10 and a crankcase upper part 12, in which two rows of cylinders 1 to 4 and 5 to 8 are arranged in a V-shape to each other.
  • the crankcase upper part 12 is followed by a cylinder head housing 14 for each row of cylinders.
  • Both cylinder rows are identical in construction, in Figure 1, only the cylinder head housing 14 for cylinder row 1 to 4 (in the left view) is shown, while for the right cylinder bank (cylinders 5 to 8) for better representation of the coolant flows, the cylinder head housing is not shown , Both cylinder rows have cylinder cooling surfaces surrounding the cylinder surfaces 16 and 18, wherein the cylinder cooling jackets 16, 18 are assigned only to the upper region of the cylinder surfaces; the length I of the cylinder cooling jackets 16, 18 amounts to approximately 1/2 of the total length of the individual cylinders or cylinder running surfaces.
  • the arranged on the front side of the cylinder cooling jackets 16, 18 slot-like openings 24 are closed by means of a cylinder head gasket, not shown.
  • cooling jackets are also arranged, which are referred to below as the cylinder head cooling chambers 20, 22.
  • the cooling chamber cross-section 22 has been shown for the right-hand cylinder row (cylinders 5 to 8).
  • the spirally formed housing 26 of a water pump is arranged, wherein the cover part of the water pump, not shown, receives the driven via the crankshaft turbine wheel for generating the coolant flow.
  • a structural unit 27 is provided which, inter alia, has a return chamber 28, which, as described in more detail below, the return for the coolant from the cylinder cooling jackets 16, 18 and the cylinder head cooling chambers 20, 22 forms.
  • the pressure-side outlet 30 of the water pump housing 26 is connected to a coolant distributor pipe 34 via a coolant pipe 32 which extends between the two cylinder rows to the other end face of the internal combustion engine.
  • the coolant distributor pipe 34 has two respective ports 36, 38, which are designed as connecting pieces per cylinder row, and are shown in FIG. 1 only for the right-hand cylinder bank (cylinders 5-8).
  • the first connecting pieces 36 are connected to the arranged in the cylinder block longitudinally flow-through cooling jackets 16, 18, while the second connecting piece 38 are connected to cast into the crankcase upper part 12 outer coolant longitudinal channels 40, 41.
  • the outer coolant longitudinal channels 40, 41 have the individual cylinder head units associated with inlet openings 47, via which the coolant is guided into the cylinder head cooling chambers 20, 22.
  • the assembly 27 in addition to the return chamber 28, a second return chamber 56, which is controlled by a first valve disc 51 of a thermostat 52 opening 54 with the first return chamber 56 and the intake manifold 31 of the pump housing 26 communicates.
  • the consisting of the two return chambers 28 and 56 and the thermostat 52 assembly 27 is constructed in two parts, wherein the lower part of the assembly 27 is poured together with the pump housing 26 in the crankcase upper part 12 between the two cylinder banks.
  • the thermostat 52 receiving housing cover 66 of the assembly 27 is bolted to the lower part of the assembly 27.
  • the second valve plate 53 of the thermostat 52 controls a leading to the second return chamber 56 return opening 58, wherein the first return chamber 28 connected to the nozzle 59, the flow and connected to the second return chamber 56 nozzle 61 forms the return of a cooler not shown.
  • the second return chamber 56 is further connected to the return line 60 of a heating circuit, not shown, and a line 62 leading to a surge tank connected. Starting from the first return chamber 28, a line 64 forms the heating flow.
  • the activated in the warm-up phase of the engine coolant circuit hereinafter referred to as a small coolant circuit, works as follows:
  • the opening 54 between the first return chamber 28 and the second return chamber 56 through the first valve plate 51 of the thermostat 52 is released (see Fig. 4), so that the coolant from the first return chamber 28 into the second return chamber 56 passes. From there it is conveyed via the intake manifold 31 of the water pump housing 26 into the coolant pipe 32 and via the coolant distributor pipe 34 to the cylinder cooling jackets 16 arranged in the cylinder block. 18 and via the outer coolant longitudinal channels 40, 41 to the arranged in the cylinder head housing 14 cylinder head cooling chambers 20, 22 out.
  • a throttle 50 is provided in the cylinder cooling jackets 16, 18, by means of which the flow resistance is adjusted so that 70 to 80%, preferably 75% of the coolant flow circulated to the engine cooling pass through the outer coolant longitudinal passages 40, 41 into the cylinder head housing 14 ,
  • the specified percentage distribution of the coolant flow ensures that a demand-based cooling of the high-temperature-loaded cylinder head housing 14 and the cylinder block takes place.
  • the radiator circuit is activated, in which the coolant, after it has passed through the small coolant circuit, passes through the flow nozzle 59, the cooler, not shown, and the return pipe 61 into the second return chamber 56.

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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)
  • Valve Device For Special Equipments (AREA)

Abstract

A cooling circuit arrangement for a multicylinder internal combustion engine with V-shaped cylinder banks and cooling jackets which surround the cylinder banks and which are provided with cooling liquid by a pump arranged between the two cylinder banks on one of their face sides is disclosed. The pressure-sided connection of the coolant pump, arranged on the one face side of the two cylinder banks, is connected by a coolant pipe to a distributor pipe, arranged on the other face side of the cylinder banks, for the purpose of feeding cooling liquid. A return flow chamber for the coolant from the cooling jackets is arranged between the two cylinder banks adjacent to the pump housing. In this manner the space, existing between the two cylinder banks, is utilized for a part of the coolant arrangement so that the internal combustion engine exhibits a compact design.

Description

Die Erfindung betrifft ein Kühlkreislaufanordnung für eine Brennkraftmaschine nach den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a cooling circuit arrangement for an internal combustion engine according to the features of the preamble of claim 1.

Ein derartige Anordnung ist beispielsweise aus der EP 0 219 351 A2 bekannt, bei der durch eine Kühlmittelpumpe, die an einer Stirnseite der Brennkraftmaschine zwischen den V- förmig ausgerichteten Zylinderbänken angeordnet ist, die in den Zylinderbänken integrierten Kühlmäntel mit Kühlflüssigkeit versorgt werden. Auf der anderen Stirnseite der Brennkraftmaschine ist eine Sammelleitung für das aus den Zylindern und einem Kühlerkreislauf zurückströmende Kühlmittel angeordnet. Durch die mit mehreren Anschlüssen versehenen Sammelleitung werden die eigentlichen Abmessungen der Brennkraftmaschine überschritten, so daß insbesondere bei einem Längseinbau des Motors in das Fahrzeug Bauraum beansprucht wird, der dem Fahrgastraum nicht mehr zur Verfügung steht.Such an arrangement is known, for example, from EP 0 219 351 A2, in which the cooling jackets integrated in the cylinder banks are supplied with cooling fluid by a coolant pump which is arranged on one end side of the internal combustion engine between the cylinder banks oriented in the form of a V. On the other end face of the internal combustion engine, a collecting line for the flowing back from the cylinders and a radiator coolant is arranged. Due to the multi-port manifold the actual dimensions of the engine are exceeded, so that in particular in a longitudinal installation of the engine in the vehicle space is claimed, which is no longer available to the passenger compartment.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, einen konstruktive Anordnung für einen Kühlkreislauf bei einer Brennkraftmaschine mit V- förmig angeordneten Zylindern zu schaffen, bei der die vorhandenen Freiräume ausgenutzt werden, so daß die eigentlichen Abmessungen der Brennkraftmaschine nicht überschritten werden.The invention is based on the object to provide a constructive arrangement for a cooling circuit in an internal combustion engine with V-shaped cylinders, in which the existing open spaces are utilized, so that the actual dimensions of the internal combustion engine are not exceeded.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmalen des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Dadurch, daß der zwischen den beiden Zylinderbänken vorhandene Raum für einen Teil der Kühlmittelanordnung ausgenutzt wird, steht eine kompakt bauende Brennkraftmaschine zur Verfügung, die insbesondere für den Längseinbau in ein Kraftfahrzeug geeignet ist. Auf der dem Kühlmittelverteilerrohr zugeordneten Stirnseite ist auf einfache Art und Weise die Anbindung eines Getriebes an die Brennkraftmaschine möglich, da keine den Einbau störenden Teile der Kühlmittelanordnung den Zugang behindern.Characterized in that the existing space between the two cylinder banks space is used for part of the coolant assembly, is a compactly-built internal combustion engine available, which is particularly suitable for longitudinal installation in a motor vehicle. On the coolant distribution pipe associated end face is in a simple way the connection of a transmission to the internal combustion engine possible because no disturbing the installation parts of the coolant arrangement hinder access.

Weitere Vorteile und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Further advantages and advantageous developments of the invention will become apparent from the dependent claims and the description.

Durch die parallele, d.h. gleichzeitige Kühlmitteldurchströmung von Zylinderblock und Zylinderkopfgehäuse wird ohne zusätzliche Steuereinrichtungen eine bedarfsgerechte Kühlung von Zylinderblock und Zylinderkopf erreicht. Der Motor erreicht schnell seine Betriebstemperatur; damit reduziert sich die Kaltlaufphase und als Folge davon können der Kraftstoffverbrauch und die Rohemissionen reduziert werden. Durch die parallele Aufteilung des Kühlmittelstromes können die Querschnitte der Kühlkanäle im Zylinderblock reduziert werden, so daß der Bauraum und damit auch das Gewicht der Brennkraftmaschine weiter reduzierbar ist. Gegenüber einer seriellen Kühlmitteldurchströmung von Zylinderblock und Zylinderkopf reduziert sich der Druckverlust im Kühlkreislauf, wodurch die Antriebsleistung der Wasserpumpe kleiner gewählt werden kann.By the parallel, i. simultaneous coolant flow of the cylinder block and cylinder head housing is achieved without additional control devices on demand cooling of cylinder block and cylinder head. The engine quickly reaches its operating temperature; This reduces the cold-start phase and, as a result, reduces fuel consumption and raw emissions. Due to the parallel distribution of the coolant flow, the cross sections of the cooling channels in the cylinder block can be reduced, so that the space and thus the weight of the internal combustion engine is further reduced. Compared to a serial coolant flow of cylinder block and cylinder head, the pressure loss in the cooling circuit is reduced, whereby the drive power of the water pump can be made smaller.

Mit Hilfe der beiden an der Kühlmittelpumpe angeordneten Rücklaufkammern, die über eine durch ein Thermostat kontrollierbare Öffnung miteinander in Verbindung stehen, läßt sich eine zwischen den beiden Zylinderbänken kompakt bauende Regeleinheit realisieren, mit der ein kleiner und großer Kühlmittelkreislauf sowie ein Heizkreislauf betrieben werden kann. Dadurch, daß die Regeleinheit zusammen mit der Kühlmittelpumpe im eingebauten Zustand der Brennkraftmaschine im Fahrzeug in Fahrtrichtung gesehen an der vorderen Stirnseite der Brennkraftmaschine angeordnet ist, ist sie für Wartungs- und Reparaturarbeiten leicht zugänglich.With the help of the two arranged on the coolant pump return chambers, which are connected via a controllable by a thermostat opening with each other, can be realized between the two cylinder banks compact control unit, with a small and large coolant circuit and a heating circuit can be operated. Characterized in that the control unit is arranged together with the coolant pump in the installed state of the internal combustion engine in the vehicle seen in the direction of travel on the front end side of the internal combustion engine, it is easily accessible for maintenance and repair work.

Der untere Teil der beiden aus einer Baueinheit bestehenden Rücklaufkammern ist in vorteilhafter Weise zusammen mit dem Gehäuse der Kühlmittelpumpe im Kurbelgehäuseoberteil eingegossen.The lower part of the two of a unit existing return chambers is poured in an advantageous manner together with the housing of the coolant pump in the crankcase upper part.

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert. Letztere zeigt in

Fig. 1
eine Brennkraftmaschine in schematischer Gesamtansicht,
Fig. 2
eine Vorderansicht der als V- Motor ausgebildeten Brennkraftmaschine,
Fig. 3
einen Schnitt entlang der Linie III-III in Fig. 2,
Fig. 4
einen Schnitt entlang der Linie IV-IV in Fig. 2 und
Fig. 5,6
zwei Draufsichten auf einen Teilauschnitt der Brennkraftmaschine.
An embodiment of the invention is explained in more detail in the following description and drawings. The latter shows in
Fig. 1
an internal combustion engine in a schematic overall view,
Fig. 2
a front view of the engine designed as a V-engine,
Fig. 3
a section along the line III-III in Fig. 2,
Fig. 4
a section along the line IV-IV in Fig. 2 and
Fig. 5.6
two plan views of a partial section of the internal combustion engine.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Der in Fig.1 dargestellte V8-Motor besteht aus einem Kurbelgehäuseunterteil 10 und einem Kurbelgehäuseoberteil 12, in dem zwei Zylinderreihen 1 bis 4 und 5 bis 8 V-förmig zueinander angeordnet sind. An das Kurbelgehäuseoberteil 12 schließt sich für jede Zylinderreihe ein Zylinderkopfgehäuse 14 an. Beide Zylinderreihen sind vom Aufbau identisch, wobei in Figur 1 nur das Zylinderkopfgehäuse 14 für Zylinderreihe 1 bis 4 (in der Ansicht links) dargestellt ist, während für die rechte Zylinderreihe (Zylinder 5 bis 8) zur besseren Darstellung der Kühlmittelströme das Zylinderkopfgehäuse nicht dargestellt ist. Beide Zylinderreihen verfügen über die Zylinderlaufflächen umgebende Zylinderkühlmäntel 16 und 18, wobei die Zylinderkühlmäntel 16, 18 nur dem oberen Bereich der Zylinderlaufflächen zugeordnet sind; die Länge I der Zylinderkühlmäntel 16, 18 beläuft sich auf ca. 1/2 der Gesamtlänge der einzelnen Zylinder bzw. Zylinderlaufflächen. Die auf der Stirnseite der Zylinderkühlmäntel 16, 18 angeordneten schlitzartigen Öffnungen 24 werden mit Hilfe einer nicht dargestellten Zylinderkopfdichtung verschlossen. Im Zylinderkopfgehäuse 14 sind ebenfalls Kühlmäntel angeordnet, die im folgenden als Zylinderkopfkühlräume 20, 22 bezeichnet werden. Zur besseren Darstellung der Zylinderkopfkühlräume 20, 22 ist für die rechte Zylinderreihe (Zylinder 5 bis 8) der Kühlraumquerschnitt 22 dargestellt worden.The V8 engine shown in Figure 1 consists of a crankcase lower part 10 and a crankcase upper part 12, in which two rows of cylinders 1 to 4 and 5 to 8 are arranged in a V-shape to each other. The crankcase upper part 12 is followed by a cylinder head housing 14 for each row of cylinders. Both cylinder rows are identical in construction, in Figure 1, only the cylinder head housing 14 for cylinder row 1 to 4 (in the left view) is shown, while for the right cylinder bank (cylinders 5 to 8) for better representation of the coolant flows, the cylinder head housing is not shown , Both cylinder rows have cylinder cooling surfaces surrounding the cylinder surfaces 16 and 18, wherein the cylinder cooling jackets 16, 18 are assigned only to the upper region of the cylinder surfaces; the length I of the cylinder cooling jackets 16, 18 amounts to approximately 1/2 of the total length of the individual cylinders or cylinder running surfaces. The arranged on the front side of the cylinder cooling jackets 16, 18 slot-like openings 24 are closed by means of a cylinder head gasket, not shown. In the cylinder head housing 14 cooling jackets are also arranged, which are referred to below as the cylinder head cooling chambers 20, 22. For a better representation of the cylinder head cooling chambers 20, 22, the cooling chamber cross-section 22 has been shown for the right-hand cylinder row (cylinders 5 to 8).

Zwischen den beiden Zylinderreihen ist das spiralförmig ausgebildete Gehäuse 26 einer Wasserpumpe angeordnet, wobei das nicht dargestellte Deckelteil der Wasserpumpe das über die Kurbelwelle angetriebene Turbinenrad zur Erzeugung der Kühlmittelströmung aufnimmt. Hinter dem Gehäuse 26 der Wasserpumpe ist eine Baueinheit 27 vorgesehen, die unter anderem eine Rücklaufkammer 28 aufweist, die, wie später noch näher beschrieben, den Rücklauf für das Kühlmittel aus den Zylinderkühlmänteln 16, 18 und den Zylinderkopfkühlräumen 20, 22 bildet.Between the two rows of cylinders, the spirally formed housing 26 of a water pump is arranged, wherein the cover part of the water pump, not shown, receives the driven via the crankshaft turbine wheel for generating the coolant flow. Behind the housing 26 of the water pump, a structural unit 27 is provided which, inter alia, has a return chamber 28, which, as described in more detail below, the return for the coolant from the cylinder cooling jackets 16, 18 and the cylinder head cooling chambers 20, 22 forms.

Der druckseitige Ausgang 30 des Wasserpumpengehäuses 26 ist über ein Kühlmittelrohr 32, das sich zwischen den beiden Zylinderreihen zur anderen Stirnseite der Brennkraftmaschine erstreckt, mit einem Kühlmittelverteilerrohr 34 verbunden. Das Kühlmittelverteilerrohr 34 verfügt pro Zylinderreihe über jeweils zwei als Anschlußstutzen ausgebildete Anschlüsse 36, 38, die in Figur 1 nur für die rechte Zylinderreihe (Zyl. 5-8) dargestellt sind. Die ersten Anschlußstutzen 36 sind mit dem im Zylinderblock angeordneten längs durchströmten Kühlmänteln 16, 18 verbunden, während die zweiten Anschlußstutzen 38 mit in das Kurbelgehäuseoberteil 12 eingegossenen äußeren Kühlmittellängskanälen 40, 41 verbunden sind. Die äußeren Kühlmittellängskanäle 40, 41 weisen den einzelnen Zylinderkopfeinheiten zugeordnete Einlaßöffnungen 47 auf, über die das Kühlmittel in die Zylinderkopfkühlräume 20, 22 geführt wird. Von dort aus gelangt es nach einer Querdurchströmung des Zylinderkopfgehäuses 14 in ebenfalls in das Kurbelgehäuseoberteil 12 eingegossene, mit Auslaßöffnungen 49 versehene innere Kühlmittellängskanäle 42, 43. Das ausgangsseitige Ende der inneren Kühlmittellängskanäle 42, 43 und das ausgangsseitige Ende der beiden Zylinderkühlmäntel 16, 18 führen über gemeinsame, als Übertrittsbohrungen 44, 45 ausgebildete Ausgänge in die Rücklaufkammer 28. Die Gesamtabmessungen, insbesondere die Längserstreckung der Brennkraftmaschine wird durch die Anordnung des Kühlmittelverteilerrohres 34, der Anschlußstutzen 36, 38 und der Rücklaufkammer 28 nicht verändert; gleichzeitig wird auf einfache Art und Weise der Anbau eines Getriebes auf der dem Kühlmittelverteilerrohr 34 zugewandten Stirnseite der Brennkraftmaschine ermöglicht.The pressure-side outlet 30 of the water pump housing 26 is connected to a coolant distributor pipe 34 via a coolant pipe 32 which extends between the two cylinder rows to the other end face of the internal combustion engine. The coolant distributor pipe 34 has two respective ports 36, 38, which are designed as connecting pieces per cylinder row, and are shown in FIG. 1 only for the right-hand cylinder bank (cylinders 5-8). The first connecting pieces 36 are connected to the arranged in the cylinder block longitudinally flow-through cooling jackets 16, 18, while the second connecting piece 38 are connected to cast into the crankcase upper part 12 outer coolant longitudinal channels 40, 41. The outer coolant longitudinal channels 40, 41 have the individual cylinder head units associated with inlet openings 47, via which the coolant is guided into the cylinder head cooling chambers 20, 22. From there, it passes through a transverse flow of the cylinder head housing 14 in likewise into the crankcase upper part 12 provided with outlet openings 49 inner coolant longitudinal channels 42, 43. The output end of the inner coolant longitudinal channels 42, 43 and the output end of the two cylinder cooling jackets 16, 18 lead over common, as Übertrittsbohrungen 44, 45 formed outputs in the return chamber 28. The overall dimensions, in particular the longitudinal extent of the internal combustion engine is not changed by the arrangement of the coolant manifold 34, the connecting piece 36, 38 and the return chamber 28; At the same time, the cultivation of a Gear on the coolant distribution pipe 34 facing the front side of the engine allows.

Wie in den Figuren 2 bis 6 näher dargestellt, weist die Baueinheit 27 neben der Rücklaufkammer 28 eine zweite Rücklaufkammer 56 auf, die über eine durch einen ersten Ventilteller 51 eines Thermostats 52 geregelte Öffnung 54 mit der ersten Rücklaufkammer 56 und mit dem Ansaugstutzen 31 des Pumpengehäuses 26 in Verbindung steht. Die aus den beiden Rücklaufkammern 28 und 56 und dem Thermostat 52 bestehende Baueinheit 27 ist zweiteilig aufgebaut, wobei der untere Teil der Baueinheit 27 zusammen mit dem Pumpengehäuse 26 im Kurbelgehäuseoberteil 12 zwischen den beiden Zylinderbänken eingegossen ist. Der das Thermostat 52 aufnehmende Gehäusedeckel 66 der Baueinheit 27 wird mit dem unteren Teil der Baueinheit 27 verschraubt. Der zweite Ventilteller 53 des Thermostats 52 kontrolliert eine zur zweiten Rücklaufkammer 56 führende Rücklauföffnung 58, wobei der mit der ersten Rücklaufkammer 28 verbundene Stutzen 59 den Vorlauf und der mit der zweiten Rücklaufkammer 56 verbundene Stutzen 61 den Rücklauf eines nicht näher dargestellten Kühlerkreislaufs bildet. Wie in Figur 5 dargestellt, ist die zweite Rücklaufkammer 56 weiterhin mit der Rücklaufleitung 60 eines nicht näher dargestellten Heizungskreislaufs und einer Leitung 62, die zu einem Ausgleichsbehälter führt, verbunden. Von der ersten Rücklaufkammer 28 ausgehend, bildet eine Leitung 64 den Heizungsvorlauf.As shown in more detail in Figures 2 to 6, the assembly 27 in addition to the return chamber 28, a second return chamber 56, which is controlled by a first valve disc 51 of a thermostat 52 opening 54 with the first return chamber 56 and the intake manifold 31 of the pump housing 26 communicates. The consisting of the two return chambers 28 and 56 and the thermostat 52 assembly 27 is constructed in two parts, wherein the lower part of the assembly 27 is poured together with the pump housing 26 in the crankcase upper part 12 between the two cylinder banks. The thermostat 52 receiving housing cover 66 of the assembly 27 is bolted to the lower part of the assembly 27. The second valve plate 53 of the thermostat 52 controls a leading to the second return chamber 56 return opening 58, wherein the first return chamber 28 connected to the nozzle 59, the flow and connected to the second return chamber 56 nozzle 61 forms the return of a cooler not shown. As shown in Figure 5, the second return chamber 56 is further connected to the return line 60 of a heating circuit, not shown, and a line 62 leading to a surge tank connected. Starting from the first return chamber 28, a line 64 forms the heating flow.

Der in der Warmlaufphase des Motors aktivierte Kühlmittelkreislauf, im folgenden als kleiner Kühlmittelkreislauf bezeichnet, funktioniert folgendermaßen:The activated in the warm-up phase of the engine coolant circuit, hereinafter referred to as a small coolant circuit, works as follows:

In dieser Betriebsphase ist die Öffnung 54 zwischen der ersten Rücklaufkammer 28 und der zweiten Rücklaufkammer 56 durch den ersten Ventilteller 51 des Thermostats 52 freigegeben (siehe Fig. 4), so daß das Kühlmittel von der ersten Rücklaufkammer 28 in die zweite Rücklaufkammer 56 gelangt. Von dort wird es über den Ansaugstutzen 31 des Wasserpumpengehäuses 26 in das Kühlmittelrohr 32 gefördert und über das Kühlmittelverteilerrohr 34 zu den im Zylinderblock angeordneten Zylinderkühlmänteln 16, 18 sowie über die äußeren Kühlmittellängskanäle 40, 41 zu den im Zylinderkopfgehäuse 14 angeordneten Zylinderkopfkühlräumen 20, 22 geführt. Eingangsseitig ist in den Zylinderkühlmänteln 16, 18 eine Drossel 50 vorgesehen, mit deren Hilfe der Strömungswiderstand so abgestimmt ist, daß 70 bis 80 %, vorzugsweise 75 % des zur Motorkühlung in Umlauf gebrachten Kühlmittelstromes über die äußeren Kühlmittellängskanäle 40, 41 in das Zylinderkopfgehäuse 14 gelangen. Durch die angegebene prozentuale Verteilung des Kühlmittelstromes ist sichergestellt, daß eine bedarfsgerechte Kühlung des temperaturhochbelasteten Zylinderkopfgehäuses 14 und des Zylinderblockes erfolgt. Nachdem die Zylinderkühlmäntel 16, 18 und die Zylinderkopfkühlräume 20, 22 beider Zylinderreihen vom Kühlmittel durchströmt worden sind, wird das Kühlmittel über die gemeinsamen Übertrittsbohrungen 44, 45 wieder in die erste Rücklaufkammer 28 zurück geführt.In this phase of operation, the opening 54 between the first return chamber 28 and the second return chamber 56 through the first valve plate 51 of the thermostat 52 is released (see Fig. 4), so that the coolant from the first return chamber 28 into the second return chamber 56 passes. From there it is conveyed via the intake manifold 31 of the water pump housing 26 into the coolant pipe 32 and via the coolant distributor pipe 34 to the cylinder cooling jackets 16 arranged in the cylinder block. 18 and via the outer coolant longitudinal channels 40, 41 to the arranged in the cylinder head housing 14 cylinder head cooling chambers 20, 22 out. On the input side, a throttle 50 is provided in the cylinder cooling jackets 16, 18, by means of which the flow resistance is adjusted so that 70 to 80%, preferably 75% of the coolant flow circulated to the engine cooling pass through the outer coolant longitudinal passages 40, 41 into the cylinder head housing 14 , By the specified percentage distribution of the coolant flow ensures that a demand-based cooling of the high-temperature-loaded cylinder head housing 14 and the cylinder block takes place. After the cylinder cooling shells 16, 18 and the cylinder head cooling chambers 20, 22 of both rows of cylinders have been flowed through by the coolant, the coolant through the common Übertrittsbohrungen 44, 45 back into the first return chamber 28 back.

Neben dem soeben beschriebenen kleinen Kühlmittelkreislauf wird nach dem Erreichen der Betriebstemperatur der Brennkraftmaschine auf einen großen Kühlmittelkreislauf umgeschaltet, bei dem, wie bekannt ist, der Kühlerkreislauf mit einbezogen ist.
In diesem Fall wird durch den ersten Ventilteller 51 des Thermostats 52 die Öffnung 54 verschlossen, während die durch den zweiten Ventilteller 53 kontrollierte Öffnung 58 zum Kühlerkreislauf freigegeben wird. Damit ist der Kühlerkreislauf aktiviert, bei dem das Kühlmittel, nachdem es den kleinen Kühlmittelkreislauf durchlaufen hat, über den VorlaufStutzen 59, den nicht dargestellten Kühler und den Rücklauf-Stutzen 61 in die zweite Rücklaufkammer 56 gelangt.
In addition to the small coolant circuit just described, after reaching the operating temperature of the internal combustion engine is switched to a large coolant circuit in which, as is known, the cooler circuit is included.
In this case, the opening 54 is closed by the first valve plate 51 of the thermostat 52, while the controlled by the second valve plate 53 opening 58 is released to the radiator circuit. Thus, the radiator circuit is activated, in which the coolant, after it has passed through the small coolant circuit, passes through the flow nozzle 59, the cooler, not shown, and the return pipe 61 into the second return chamber 56.

Claims (10)

  1. A cooling-circuit arrangement for a multiple-cylinder internal-combustion engine with cylinder banks in a V-arrangement and cooling jackets which surround the cylinder banks and which are supplied with liquid coolant by way of a pump arranged between the two cylinder banks on one of their end faces, characterized in that the pump arranged on one end face of the two cylinder banks is connected by its pressure-side connexion by way of a coolant pipe (32) to a distributor pipe (34) arranged on the other end face of the cylinder banks for supplying the liquid coolant, and a return chamber (28) for the coolant from the cooling jackets (16, 18, 20, 22) is arranged adjacent to the pump housing (26) between the two cylinder banks.
  2. A cooling-circuit arrangement according to Claim 1, characterized in that the distributor pipe (34) has four connexions, wherein two connexions (36, 38) are connected to the cooling jackets (16, 18, 20, 22) of one cylinder bank in each case.
  3. A cooling-circuit arrangement according to Claim 2, characterized in that a first connexion (36) is connected to a cylinder cooling jacket (16, 18) per cylinder bank and a second connexion (38) is connected to a cylinder-head cooling chamber (20, 22) per cylinder bank.
  4. A cooling-circuit arrangement according to Claim 3, characterized in that a transverse through-flow of the cylinder-head cooling chamber (20, 22) with liquid coolant takes place by way of an external longitudinal coolant duct (40, 41) which is connected to the connexion (38) and which has inlet openings (47) associated with the individual cylinder-head units and leading into the cylinder-head cooling chamber (20, 22).
  5. A cooling-circuit arrangement according to Claim 4, characterized in that an internal longitudinal coolant duct (42, 43) is connected on the outlet side to the cylinder-head cooling chamber (20, 22) by way of outlet openings (49) arranged in the internal longitudinal coolant duct (42, 43).
  6. A cooling-circuit arrangement according to any one of the preceding Claims, characterized in that the return chamber (28) is adjoined by a second return chamber (56), wherein the two are connected by way of an opening (54) controllable by a thermostat (52), and the second return chamber (56) has an opening (58) for connecting a coolant circuit which is likewise controllable by the thermostat (52).
  7. A cooling-circuit arrangement according to Claim 4, characterized in that the first return chamber (28) is provided with a forward connexion (64) and the second return chamber (56) is provided with a return connexion (60) for a heating circuit.
  8. A cooling-circuit arrangement according to Claim 4 or 5, characterized in that the second return chamber (56) has a return connexion (62) for a water circuit provided with a compensating tank.
  9. A cooling-circuit arrangement according to any one of Claims 4 to 6, characterized in that the two return chambers (28, 56) comprise a two-part structural unit (27), wherein the housing cover (66) of the structural unit (27) receives the thermostat (52).
  10. A cooling-circuit arrangement according to Claim 7, characterized in that the lower part of the structural unit (27) is cast together with the pump housing (26) in the upper part (12) of the crankcase.
EP01927830A 2000-05-03 2001-03-29 Cooling circuit for a multi-cylinder internal combustion engine Expired - Lifetime EP1280985B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10021526 2000-05-03
DE10021526A DE10021526C2 (en) 2000-05-03 2000-05-03 Arrangement for cooling a multi-cylinder internal combustion engine
PCT/EP2001/003572 WO2001083959A1 (en) 2000-05-03 2001-03-29 Cooling circuit for a multi-cylinder internal combustion engine

Publications (2)

Publication Number Publication Date
EP1280985A1 EP1280985A1 (en) 2003-02-05
EP1280985B1 true EP1280985B1 (en) 2006-12-13

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EP01927830A Expired - Lifetime EP1280985B1 (en) 2000-05-03 2001-03-29 Cooling circuit for a multi-cylinder internal combustion engine

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US (1) US6595166B2 (en)
EP (1) EP1280985B1 (en)
JP (1) JP2003532017A (en)
AT (1) ATE348253T1 (en)
DE (2) DE10021526C2 (en)
ES (1) ES2274881T3 (en)
WO (1) WO2001083959A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004132307A (en) * 2002-10-11 2004-04-30 Honda Motor Co Ltd Water-cooled vertical engine and outboard motor loaded with the same
DE102006006121B4 (en) * 2006-02-10 2007-10-25 Audi Ag Internal combustion engine with arranged in at least two parallel cylinder banks cylinders
DE102006019737A1 (en) * 2006-04-28 2007-10-31 Bayerische Motoren Werke Ag Internal-combustion engine`s cooling system for vehicle, has two heat exchangers and cooling medium pump comprising two inlets and two outlets, where cooling medium that flows through heat exchangers also flows through inlets and outlets
JP4479700B2 (en) * 2006-08-01 2010-06-09 トヨタ自動車株式会社 Cooling device for V-type internal combustion engine
JP4735602B2 (en) * 2007-05-15 2011-07-27 日産自動車株式会社 Cooling device for V-type internal combustion engine
US10851686B2 (en) * 2015-06-10 2020-12-01 Sixteen Power, LLC System and method for the delivery and recovery of cooling fluid and lubricating oil for use with internal combustion engines
DE102022003904A1 (en) * 2022-10-13 2024-04-18 Deutz Aktiengesellschaft internal combustion engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1468508A (en) * 1973-04-12 1977-03-30 Perkins Engines Ltd Engine cooling system
US4312304A (en) * 1979-08-06 1982-01-26 Brunswick Corporation V-Engine cooling system particularly for outboard motors
JPS58107840A (en) 1981-12-22 1983-06-27 Nissan Motor Co Ltd Cooling device of v-type internal-combustion engine
JPS6291615A (en) * 1985-10-16 1987-04-27 Honda Motor Co Ltd Cooling water passage device in v-type engine
JP2690968B2 (en) 1988-09-30 1997-12-17 ヤマハ発動機株式会社 V-type engine cooling system
JPH06101475A (en) * 1992-09-18 1994-04-12 Nissan Motor Co Ltd Cooling device of internal combustion engine
DE4326158C2 (en) * 1993-08-04 1995-05-11 Daimler Benz Ag Liquid guidance for an internal combustion engine
DE19803808A1 (en) * 1998-01-31 1999-08-05 Volkswagen Ag Internal combustion engine

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US6595166B2 (en) 2003-07-22
EP1280985A1 (en) 2003-02-05
DE50111637D1 (en) 2007-01-25
DE10021526A1 (en) 2001-11-15
JP2003532017A (en) 2003-10-28
ATE348253T1 (en) 2007-01-15
US20020189558A1 (en) 2002-12-19
DE10021526C2 (en) 2002-07-18
ES2274881T3 (en) 2007-06-01
WO2001083959A1 (en) 2001-11-08

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