EP1474592B1 - Water-cooled, multicylinder internal combustion engine - Google Patents

Water-cooled, multicylinder internal combustion engine Download PDF

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Publication number
EP1474592B1
EP1474592B1 EP02718205A EP02718205A EP1474592B1 EP 1474592 B1 EP1474592 B1 EP 1474592B1 EP 02718205 A EP02718205 A EP 02718205A EP 02718205 A EP02718205 A EP 02718205A EP 1474592 B1 EP1474592 B1 EP 1474592B1
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EP
European Patent Office
Prior art keywords
thermostat
water
internal combustion
combustion engine
cooled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02718205A
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German (de)
French (fr)
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EP1474592A2 (en
Inventor
Manfred Batzill
Falk Schulkowski
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication of EP1474592A2 publication Critical patent/EP1474592A2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps

Definitions

  • the invention relates to a water-cooled, multi-cylinder internal combustion engine according to the features of the preamble of claim 1.
  • a water-cooled internal combustion engine in which between the two cylinder banks a two cooling circuits controlling thermostat is arranged in a surrounding him thermostat housing.
  • the thermostat housing consists of an integrally connected to the crankcase upper part lower part and a thermostat cover, are formed on the corresponding inlet and outlet nozzles.
  • corresponding wall sections are provided in the lower part, are formed by the corresponding controllable by the thermostat chambers.
  • a cooling water device for an internal combustion engine which has a thermostat device with two thermostatic valves. After a first heating of the cooling water passes through the opened first thermostatic valve, a subset of the cooling water in a bypass line, wherein the conveyed through the bypass line cooling water quantity is controlled in dependence on the cooling water temperature by means of the second thermostatic valve.
  • the object of the invention is to develop for a water-cooled multi-cylinder internal combustion engine, a thermostat receiving housing, which is characterized by a simple, aerodynamic and weight-optimized design, which also takes up little space to complete.
  • the proposed insert according to the invention water chambers are formed, the openings are monitored by the thermostatic valve.
  • the insert is easy to prepare and consuming in the lower part of the thermostat housing usually necessary wall sections can be omitted.
  • crankcase upper part 2 of a V8 - engine has for each cylinder bank row a cylinder 1 to 4 and 5 to 8 enclosing the cooling jacket.
  • a water pump 6 is arranged on an end face 4 of the internal combustion engine.
  • the water pump 6 consists of a cover part 8, in which the Wasserpumpenrad 10 is mounted.
  • the housing 12 of the water pump 6 is arranged, which is integrally formed out of the crankcase upper part 2.
  • an intake manifold 14 is provided in the housing 12, which merges into a first coolant - return chamber 16 forming lower part 18 of a thermostat housing, wherein the lower part 18 is integrally formed out of the crankcase upper part 2.
  • a thermostat insert 20 is used, which is bolted by means not shown fastening means in the lower part 18 of the thermostat housing.
  • the trough-shaped and manufactured, for example, die-cast aluminum insert 20 has at its bottom a cylindrical opening 22 which, as described in more detail below, by a first valve plate 24 of a thermostatic valve 26 is monitored.
  • the thermostat insert 20 has in the lateral wall region on another, provided with a nozzle 28 opening 30. The nozzle 28 is inserted sealingly into the intake 14 of the water pump housing 12 via a 0 - ring 32.
  • the thermostat housing is closed by an upper part 34 which is sealed with its flange surface 36 relative to the flange 38 of the lower part 18.
  • thermostatic upper part 34 On the underside of the thermostat upper part 34 is a line corresponding to the dashed line (see Fig. 4 ) extending inner flange surface 40 is provided, which seals in the assembled state against the tub rim 42 of the insert 20 and whereby in the Einlegteil 20, a second coolant - return chamber 44 is formed.
  • the thermostatic upper part 34 has a connecting piece 46 leading to a cooler, not shown, which communicates with the first coolant return chamber 16.
  • a second connecting piece 48 for the back flowing from the radiator. Cooling water is connected via an opening formed in the return port 48 opening 50 with the second coolant return chamber 44 in connection.
  • the opening 50 is monitored via a second valve plate 52 of the thermostatic valve 26.
  • a holding plate 54 For attachment of the thermostatic valve, a holding plate 54 is provided, which is fastened to two holding webs 56 and 58 which are cast on the flange side of the thermostat upper part 34.

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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)

Description

Die Erfindung geht aus von einer wassergekühlten, mehrzylindrigen Brennkraftmaschine nach den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a water-cooled, multi-cylinder internal combustion engine according to the features of the preamble of claim 1.

Aus der EP 0 933 510 A2 ist eine wassergekühlte Brennkraftmaschine bekannt, bei der zwischen den beiden Zylinderbänken ein die beiden Kühlkreisläufe steuernder Thermostat in einem ihn umgebenden Thermostatgehäuse angeordnet ist. Soweit aus den Zeichnungen erkennbar, besteht das Thermostatgehäuse aus einem einstückig mit dem Kurbelgehäuseoberteil verbundenen Unterteil und einem Thermostatdeckel, an dem entsprechende Zu- bzw. Ablaufstutzen angeformt sind. Zur Steuerung der beiden Kühlkreisläufe (kleiner Kühlkreislauf - großer Kühlkreislauf) sind im Unterteil entsprechende Wandabschnitte vorgesehen sein, durch die entsprechende vom Thermostat kontrollierbare Kammern gebildet sind.From the EP 0 933 510 A2 a water-cooled internal combustion engine is known, in which between the two cylinder banks a two cooling circuits controlling thermostat is arranged in a surrounding him thermostat housing. As far as can be seen from the drawings, the thermostat housing consists of an integrally connected to the crankcase upper part lower part and a thermostat cover, are formed on the corresponding inlet and outlet nozzles. For controlling the two cooling circuits (small cooling circuit - large cooling circuit) corresponding wall sections are provided in the lower part, are formed by the corresponding controllable by the thermostat chambers.

Weiterhin ist aus der GB 483 473 A eine Kühlwasservorrichtung für eine Brennkraftmaschine bekannt, die eine Thermostateinrichtung mit zwei Thermostatventilen aufweist. Nach einer ersten Erwärmung des Kühlwassers gelangt durch das geöffnete erste Thermostatventil eine Teilmenge des Kühlwassers in eine Bypassleitung, wobei die durch die Bypassleitung geförderte Kühlwassermenge in Abhängigkeit von der Kühlwassertemperatur mittels des zweiten Thermostatventiles geregelt wird.Furthermore, from the GB 483 473 A a cooling water device for an internal combustion engine, which has a thermostat device with two thermostatic valves. After a first heating of the cooling water passes through the opened first thermostatic valve, a subset of the cooling water in a bypass line, wherein the conveyed through the bypass line cooling water quantity is controlled in dependence on the cooling water temperature by means of the second thermostatic valve.

Aufgabe der Erfindung ist es, für eine wassergekühlte mehrzylindrige Brennkraftmaschine ein den Thermostat aufnehmendes Gehäuse zu entwickeln, das sich durch einen einfachen, strömungsgünstigen und gewichtsoptimierten Aufbau auszeichnet, der darüber hinaus wenig Bauraum in Anspruch nimmt.The object of the invention is to develop for a water-cooled multi-cylinder internal combustion engine, a thermostat receiving housing, which is characterized by a simple, aerodynamic and weight-optimized design, which also takes up little space to complete.

Die Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst.The object is solved by the features specified in claim 1.

Durch das vorgeschlagene erfindungsgemäße Einlegeteil werden Wasserkammern gebildet, deren Öffnungen durch das Thermostatventil überwacht sind. Das Einlegeteil ist einfach herzustellen und aufwendige im Unterteil des Thermostatgehäuses üblicherweise notwenige Wandabschnitte können entfallen.The proposed insert according to the invention water chambers are formed, the openings are monitored by the thermostatic valve. The insert is easy to prepare and consuming in the lower part of the thermostat housing usually necessary wall sections can be omitted.

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.

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

Fig. 1
eine Draufsicht auf eine wassergekühlte, mehrzylindrige Brennkraftmaschine,
Fig. 2
eine Explosionsdarstellung eines Thermostatgehäuses,
Fig. 3
eine Draufsicht auf das Oberteil eines Thermostatgehäuses,
Fig. 4
eine Ansicht auf das Oberteil des Thermostatgehäuses von unten,
Fig. 5
eine Schnittdarstellung entlang der Linie V - V in Fig. 3,
Fig. 6
eine Schnittdarstellung entlang der Linie V - V in Fig. 3 in einer zweiten Stellung des Thermostatventils und
Fig. 7
eine Schnittdarstellung entlang der Linie VII - VII in Fig. 3.
An embodiment of the invention is explained in more detail in the following description and drawings. The latter shows in
Fig. 1
a top view of a water-cooled, multi-cylinder internal combustion engine,
Fig. 2
an exploded view of a thermostat housing,
Fig. 3
a top view of the upper part of a thermostat housing,
Fig. 4
a view of the upper part of the thermostat housing from below,
Fig. 5
a sectional view taken along the line V - V in Fig. 3 .
Fig. 6
a sectional view taken along the line V - V in Fig. 3 in a second position of the thermostatic valve and
Fig. 7
a sectional view taken along the line VII - VII in Fig. 3 ,

Beschreibung des AusführungsbeispielsDescription of the embodiment

Das in Fig. 1 dargestellte Kurbelgehäuseoberteil 2 eines V8 - Motors weist für jede Zylinderbankreihe einen die Zylinder 1 bis 4 und 5 bis 8 umschließenden Kühlmantel auf. Zur Erzeugung einer Zwangsströmung in den Kühlmänteln ist an einer Stirnseite 4 der Brennkraftmaschine eine Wasserpumpe 6 angeordnet. Die Wasserpumpe 6 besteht aus einem Deckelteil 8, in dem das Wasserpumpenrad 10 gelagert ist. Zwischen den beiden Zylinderreihen ist das Gehäuse 12 der Wasserpumpe 6 angeordnet, das einstückig aus dem Kurbelgehäuseoberteil 2 herausgebildet ist. Koaxial zum Wasserpumpenrad 10 ist im Gehäuse 12 ein Ansaugstutzen 14 vorgesehen, der in ein eine erste Kühlmittel - Rücklaufkammer 16 bildendes Unterteil 18 eines Thermostatgehäuses übergeht, wobei das Unterteil 18 einstückig aus dem Kurbelgehäuseoberteil 2 herausgebildet ist. In die erste Kühlmittel- Rücklaufkammer 16 ist ein Thermostat Einlegeteil 20 eingesetzt, das mit Hilfe von nicht dargestellten Befestigungsmitteln im Unterteil 18 des Thermostatgehäuses verschraubt ist. Das wannenförmig ausgebildete und beispielsweise aus Aluminium- Druckguss hergestellte Einlegteil 20 weist an seinem Boden eine zylindrische Öffnung 22 auf, die wie im folgenden noch näher beschrieben, durch einen ersten Ventilteller 24 eines Thermostatventils 26 überwacht ist. Das Thermostat-Einlegeteil 20 weist im seitlichen Wandbereich eine weitere, mit einem Stutzen 28 versehene Öffnung 30 auf. Der Stutzen 28 ist dabei in den Ansaugstutzen 14 des Wasserpumpengehäuses 12 über einen 0 - Ring 32 dichtend eingesteckt. Das Thermostatgehäuse wird durch ein Oberteil 34 abgeschlossen, das mit seiner Flanschfläche 36 gegenüber der Flanschfläche 38 des Unterteils 18 abgedichtet ist.This in Fig. 1 shown crankcase upper part 2 of a V8 - engine has for each cylinder bank row a cylinder 1 to 4 and 5 to 8 enclosing the cooling jacket. To generate a forced flow in the cooling jackets, a water pump 6 is arranged on an end face 4 of the internal combustion engine. The water pump 6 consists of a cover part 8, in which the Wasserpumpenrad 10 is mounted. Between the two rows of cylinders, the housing 12 of the water pump 6 is arranged, which is integrally formed out of the crankcase upper part 2. Coaxial with Wasserpumpenrad 10, an intake manifold 14 is provided in the housing 12, which merges into a first coolant - return chamber 16 forming lower part 18 of a thermostat housing, wherein the lower part 18 is integrally formed out of the crankcase upper part 2. In the first coolant return chamber 16, a thermostat insert 20 is used, which is bolted by means not shown fastening means in the lower part 18 of the thermostat housing. The trough-shaped and manufactured, for example, die-cast aluminum insert 20 has at its bottom a cylindrical opening 22 which, as described in more detail below, by a first valve plate 24 of a thermostatic valve 26 is monitored. The thermostat insert 20 has in the lateral wall region on another, provided with a nozzle 28 opening 30. The nozzle 28 is inserted sealingly into the intake 14 of the water pump housing 12 via a 0 - ring 32. The thermostat housing is closed by an upper part 34 which is sealed with its flange surface 36 relative to the flange 38 of the lower part 18.

Auf der Unterseite des Thermostat - Oberteils 34 ist eine entsprechend der gestrichelt dargestellten Linie (siehe Fig. 4) verlaufende innere Flanschfläche 40 vorgesehen, die im montierten Zustand gegenüber dem Wannenrand 42 des Einlegeteils 20 abdichtet und wodurch im Einlegteil 20 eine zweite Kühlmittel - Rücklaufkammer 44 gebildet ist. Das Thermostat- Oberteil 34 weist einen zu einem nicht dargestellten Kühler führenden Anschlussstutzen 46 auf, der mit der ersten Kühlmittel- Rücklaufkammer 16 in Verbindung steht. Ein zweiter Anschlussstutzen 48 für das vom Kühler zurückfließende. Kühlwasser steht über eine im Rücklaufstutzen 48 ausgebildete Öffnung 50 mit der zweiten Kühlmittel- Rücklaufkammer 44 in Verbindung. Die Öffnung 50 wird dabei über einen zweiten Ventilteller 52 des Thermostatventils 26 überwacht. Zur Befestigung des Thermostatventils ist ein Halteblech 54 vorgesehen, das an zwei Haltestegen 56 und 58 befestigt ist, die auf der Flanschseite des Thermostat Oberteils 34 angegossen sind.On the underside of the thermostat upper part 34 is a line corresponding to the dashed line (see Fig. 4 ) extending inner flange surface 40 is provided, which seals in the assembled state against the tub rim 42 of the insert 20 and whereby in the Einlegteil 20, a second coolant - return chamber 44 is formed. The thermostatic upper part 34 has a connecting piece 46 leading to a cooler, not shown, which communicates with the first coolant return chamber 16. A second connecting piece 48 for the back flowing from the radiator. Cooling water is connected via an opening formed in the return port 48 opening 50 with the second coolant return chamber 44 in connection. The opening 50 is monitored via a second valve plate 52 of the thermostatic valve 26. For attachment of the thermostatic valve, a holding plate 54 is provided, which is fastened to two holding webs 56 and 58 which are cast on the flange side of the thermostat upper part 34.

Im folgenden wird anhand des vorliegenden Ausführungsbeispiels das an sich bekannte Umschalten vom kleinen Kühlmittelkreislauf zum großen Kühlmittelkreislauf, in dem ein entsprechender Kühler mit einbezogen ist, erläutert:In the following, the per se known switching from the small coolant circuit to the large coolant circuit, in which a corresponding radiator is included, is explained with reference to the present exemplary embodiment:

In der Warmlaufphase des Motors ist der kleine Kühlmittelkreislauf aktiviert: Dazu ist die im Bodenbereich des Einlegeteils 20 vorgesehene Öffnung 22 durch den Ventilteller 24 freigegeben (siehe Fig. 5), so dass das aus den Zylinderbankreihen zurückströmende Kühlmittel von der ersten Kühlmittel - Rücklaufkammer 16 in die zweite Rücklaufkammer 44 gelangt. Da durch den zweiten Ventilteller 52 die Öffnung 50 verschlossen ist, wird über den Ansaugstutzen 14 der Wasserpumpe 6 das Kühlmittel über das Wasserpumpenrad 10 in ein Kühlmittelrohr 60 gefördert und gelangt von dort aus wiederum zu den in den beiden Zylinderbankreihen angeordneten Kühlmänteln.In the warm-up phase of the engine of the small coolant circuit is activated: For this purpose, provided in the bottom region of the insert 20 opening 22 is released by the valve plate 24 (see Fig. 5 ), so that the coolant flowing back from the cylinder bank rows passes from the first coolant return chamber 16 into the second return chamber 44. Since the opening 50 is closed by the second valve disk 52, via the intake 14 of the water pump 6, the coolant on the Pumped water pump 10 in a coolant tube 60 and passes from there again to the arranged in the two rows of cylinder cooling jackets.

Neben dem soeben beschriebenen kleinen Kühlmittelkreislauf wird nach dem Erreichen der Betriebstemperatur der Brennkraftmaschine auf den großen Kühlmittelkreislauf umgeschaltet, bei dem der Kühlerkreislauf mit einbezogen ist. In diesem Fall wird, wie in Fig. 6 dargestellt, durch den ersten Ventilteller 24 die Öffnung 22 verschlossen, während die durch den zweiten Ventilteller 52 kontrollierte Öffnung 50 zum Kühlerrücklauf (Rücklaufstutzen 48) freigegeben ist. Das aus den Zylinderbänken zurückströmende Kühlmittel gelangt in die erste Rücklaufkammer 16 und wird dann über den Vorlaufstutzen 46 zum Kühler geführt; das durch den Kühler abgekühlte Kühlmittel gelangt über den Rücklaufstutzen 48 in die zweite Rücklaufkammer 44 zurück und wird von dort aus wieder über den Ansaugstutzen 14 der Wasserpumpe 6 und mit Hilfe des Wasserpumpenrades 10 über das Kühlmittelrohr 60 zu den Zylinderbänken geführt.In addition to the just described small refrigerant circuit is switched after reaching the operating temperature of the internal combustion engine to the large coolant circuit in which the cooler circuit is included. In this case, as in Fig. 6 illustrated, closed by the first valve plate 24, the opening 22, while the controlled by the second valve plate 52 opening 50 to the radiator return (return pipe 48) is released. The flowing back from the cylinder banks coolant enters the first return chamber 16 and is then passed through the flow pipe 46 to the radiator; the cooled by the radiator coolant passes through the return port 48 into the second return chamber 44 and is guided from there again via the intake 14 of the water pump 6 and with the help of Wasserpumpenrades 10 via the coolant pipe 60 to the cylinder banks.

Claims (6)

  1. Water-cooled, multi-cylinder internal combustion engine with a crankcase and cooling ducts which surround the cylinders and which are acted on with coolant by means of a pump (6) in a cooling circuit (small cooling circuit), with a thermostat which is inserted in a housing being provided for switching to a large cooling circuit which is provided with a cooler, with the thermostat housing being composed of an upper part (34), which is provided with coolant connections, and a lower part (18), which is integrated in the crankcase, with an insert part (20) being inserted in the lower part (18) of the thermostat housing, which insert part (20) has at least one opening (22, 50) which is monitored by the thermostat valve (26) in order to control the small and the large cooling circuit,
    characterized in that
    a first coolant return chamber (16) is formed between the insert part (20) and the lower part (18) of the thermostat housing.
  2. Water-cooled, multi-cylinder internal combustion engine according to Claim 1, characterized in that the insert part (20) has an opening (30) which is provided with a connecting pipe (28), with the connecting pipe (28) engaging into an intake connecting pipe (14) which leads to the suction side of the water pump (6).
  3. Water-cooled, multi-cylinder internal combustion engine according to Claim 1 or 2, characterized in that the trough-shaped insert part (20) is closed off in the upward direction by the upper part (34) of the thermostat housing, and a second return chamber (44) is formed which is connected by means of the opening (22), which is monitored by the thermostat valve (26), to the first return chamber (16).
  4. Water-cooled, multi-cylinder internal combustion engine according to Claim 3, characterized in that the upper part (34) of the thermostat housing is provided with a cooler feed connecting pipe (46) and a cooler return connecting pipe (48), with the feed connecting pipe (46) being connected to the first return chamber (16) and the opening (50) of the cooler return connecting pipe (48) being connected to the second return chamber (44), and in that the opening (50) of the return connecting pipe (48) is monitored by a second valve plate (52) of the thermostat.
  5. Water-cooled, multi-cylinder internal combustion engine according to one of the preceding claims, characterized in that the lower part (18) of the thermostat housing is integrally cast together with a pump housing (12) in the crankcase upper part (2).
  6. Water-cooled, multi-cylinder internal combustion engine according to Claim 6, characterized in that the crankcase upper part (2) holds two cylinder banks which are arranged in a V-shape with respect to one another and between which the lower part of the thermostat housing is integrally cast at the one end side (4).
EP02718205A 2001-04-06 2002-03-27 Water-cooled, multicylinder internal combustion engine Expired - Lifetime EP1474592B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117090 2001-04-06
DE10117090A DE10117090B4 (en) 2001-04-06 2001-04-06 Water-cooled, multi-cylinder internal combustion engine
PCT/EP2002/003407 WO2002081881A2 (en) 2001-04-06 2002-03-27 Water-cooled, multicylinder internal combustion engine

Publications (2)

Publication Number Publication Date
EP1474592A2 EP1474592A2 (en) 2004-11-10
EP1474592B1 true EP1474592B1 (en) 2008-03-05

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US (1) US6880496B2 (en)
EP (1) EP1474592B1 (en)
JP (1) JP2004538410A (en)
DE (2) DE10117090B4 (en)
WO (1) WO2002081881A2 (en)

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WO2002081881A3 (en) 2004-09-10
DE10117090B4 (en) 2013-08-14
DE10117090A1 (en) 2002-10-17
JP2004538410A (en) 2004-12-24
EP1474592A2 (en) 2004-11-10
US20040123816A1 (en) 2004-07-01
WO2002081881A2 (en) 2002-10-17
DE50211863D1 (en) 2008-04-17
US6880496B2 (en) 2005-04-19

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