EP0933510B1 - Internal combustion engine - Google Patents

Internal combustion engine Download PDF

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Publication number
EP0933510B1
EP0933510B1 EP19980124469 EP98124469A EP0933510B1 EP 0933510 B1 EP0933510 B1 EP 0933510B1 EP 19980124469 EP19980124469 EP 19980124469 EP 98124469 A EP98124469 A EP 98124469A EP 0933510 B1 EP0933510 B1 EP 0933510B1
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EP
European Patent Office
Prior art keywords
coolant
internal combustion
combustion engine
cylinder
mixing chamber
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
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EP19980124469
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German (de)
French (fr)
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EP0933510A3 (en
EP0933510A2 (en
Inventor
Kai Bohnstedt
Frank Dr. Meyer-Hessing
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Volkswagen AG
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Volkswagen AG
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Publication date
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Publication of EP0933510A2 publication Critical patent/EP0933510A2/en
Publication of EP0933510A3 publication Critical patent/EP0933510A3/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
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F02B75/224—Multi-cylinder engines with cylinders in V, fan, or star arrangement with cylinders in fan arrangement

Definitions

  • the invention relates to an internal combustion engine having a plurality of water-cooled and V-shaped cylinders of a cylinder crankcase, in particular of a motor vehicle, with a trained V V-space between the V-forming cylinder rows, associated with respective cylinders coolant shells, wherein the coolant from the coolant shells into respective Cylinder heads and flows from these via respectiveméffenabströmö réelleen back into the cylinder crankcase in a arranged in V-space coolant return passage and wherein in the V space connected to the coolant return passage and thedekarabströmö Stamm the cylinder heads mixing chamber immediately adjacent to an outer wall of the coolant jacket of the cylinder is formed according to the preamble of claim 1.
  • a generic internal combustion engine is known from DE 40 01 140 C1.
  • common coolant supply lines and coolant discharges from which branch off the lines for each cylinder, formed in the inner free V-angle of the cylinder block as in the cylinder block longitudinal direction adjacent, open to the V-end, closable by a lid channels.
  • EP 0 637 682 B1 discloses a water-cooled multi-cylinder internal combustion engine with cylinder rows arranged in a V-shaped manner, wherein the following is formed in the V-space in a fan-like manner next to one another from inside to outside, a water feed, pump receiving bores for respective fuel injection pumps, longitudinal coolant ducts, valve tappet guides and coolant jackets of the cylinders. All this, however, is formed integrally with the cylinder crankcase, so that this arrangement is complicated and expensive to manufacture.
  • DE 41 36 773 C1 describes a distributor housing for a V-type internal combustion engine, wherein a distributor housing is arranged with a flat base plate held on a flange of the crankcase of the internal combustion engine in the V-space.
  • This distributor housing integrates a variety of commonly accepted by separately arranged components functions.
  • the distributor housing in particular leads cooling water flows of the internal combustion engine, but only connecting flanges are provided and the coolant channels themselves are to be formed completely in the cylinder crankcase. Only a water guide housing is completely formed in the distributor housing, which, however, serves only as a receptacle for a thermostat and a water pump and does not fulfill any distribution function for the cooling water.
  • the present invention is therefore based on the object to provide an improved internal combustion engine of the type mentioned above, wherein the above-mentioned disadvantages are overcome and for the coolant system, a compact design and optimum use of the V-space is achieved.
  • the mixing chamber is open on a side adjacent to the V-space side, wherein a cover is arranged such that it forms a coolant inlet channel in the V-space and provides a means for selectively connecting the coolant inlet channel with the mixing chamber is.
  • a coolant supply system by simply placing a lid on the V-space.
  • a bypass of a cooler arranged in the cooling circuit is formed immediately and without additional measures, so that in operating phases in which the internal combustion engine does not have a predetermined operating temperature, the radiator bridges and thereby quickly the predetermined operating temperature can be achieved for the first time or again.
  • side walls of the coolant channels are combined composed of cover elements and cylinder head housing elements, resulting in a further simplification of the arrangement or assembly and also later possibly required maintenance. Namely, the mixing chamber and the coolant inlet channel are accessible at any time for maintenance or test purposes by simply disassembling the lid.
  • a simple and inexpensive arrangement is achieved in that the means for selectively connecting the coolant supply channel with the mixing chamber is a map thermostat.
  • a W-shaped arrangement of the cylinder with a correspondingly compact design of the internal combustion engine is achieved in that two rows of cylinders of the V-shaped arrangement are each themselves in turn arranged V-shaped.
  • the lid is further formed to integrally have a refrigerant inlet connected to the V-space closed by the lid, and preferably, the lid is additionally formed so as to integrally connect the refrigerant return passage connected to the mixing chamber having.
  • a temperature sensor is additionally arranged on the cover, which protrudes into the coolant return channel.
  • FIG. 1 shows by way of example an internal combustion engine 10 with a W-shaped cylinder arrangement of cylinders 12, 14, 16 and 18 in a cylinder crankcase 20.
  • the internal combustion engine 10 further comprises respective cylinder heads 22 and 24, coolant jackets 26 and 28, coolant inflow openings 30 via the coolant flows in the direction of arrow 31 in the cylinder heads 22, 24, andméffenabströmö réelleen 32, flows through the coolant from the cylinder heads 22, 24 in the direction of arrow 33 again.
  • a mixing chamber 34 is bounded by walls 36 integrally formed with the cylinder crankcase and by walls 38 of the coolant jackets 26, 28.
  • the mixing chamber 34 further has an opening 40 on a side facing the V-space 35.
  • a cover 42 closes the V-space 35 and thus forms in this a coolant inlet channel 44.
  • the cover 42 additionally comprises a means 46, for example in the form of a map thermostat, which opens or closes the opening 40 selectively and thus selectively connects the mixing chamber 34 with the coolant inlet channel 44.
  • Coolant flows into the mixing chamber 34 via the coolant outflow openings 32 from the cylinder heads 22, 24.
  • the mixing chamber 34 is additional connected to a coolant return passage 48, via which the coolant flows to a heat exchanger, not shown, for example in the form of a radiator.
  • coolant flows at least partially bypassing the radiator directly into the coolant inlet channel 44 when the means 46 releases the opening 40, as indicated by an arrow.
  • the coolant is passed by means of channels 50 respectively to cylinders or their coolant shells.
  • one of the channels 50 is connected to the coolant jackets 26 of the cylinders 1 to 4 and the corresponding other passage 50 is connected to the coolant jackets 28 of the cylinders 5 to 8.
  • the coolant return channel 48 and a coolant inlet 52 are integrally formed with the lid 42 so that by simply placing the lid 42 on the V-space 35 with a handle automatically and without further measures coolant inlet 52, coolant inlet channel 44, mixing chamber 34 with optional releasable opening 40th and coolant return channel 48 are formed.
  • the lid 42 additionally comprises a temperature sensor 54, which projects into the coolant return passage 44 and determines the local temperature of the coolant and, depending on this temperature, drives the means 46 for selectively opening or closing the opening 40.
  • a front side arranged coolant pump 56 also ensures a corresponding coolant flow.
  • the coolant enters the cylinder crankcase 20 via the coolant pump 56 and is distributed there to the coolant jackets 26 and 28 of the cylinders 12 to 18. Subsequently, the coolant flows via a cylinder head gasket 58 (FIG. 1) and the coolant inflow openings 30 into the cylinder heads 22 and 24 in the direction of arrow 31, traverses them in a transverse flow and then flows on via coolant outflow openings 32 below inlet flanges 60 of the cylinder heads 22 and 24 again the cylinder head gasket 58 into the mixing chamber 34 and thus returns to the cylinder crankcase 20.
  • a cylinder head gasket 58 FIG. 1
  • the lid 42 has a multiple function: it receives the thermostat 46, closes the V-space 35 and at the same time receives the temperature sensor 54 and integrally forms a nozzle 62 for the radiator feed and a nozzle 64 for the radiator return.

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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 betrifft eine Brennkraftmaschine mit mehreren wassergekühlten und V-förmig angeordneten Zylindern eines Zylinderkurbelgehäuses, insbesondere eines Kraftfahrzeugs, mit einem im V ausgebildeten V-Raum zwischen den das V bildenden Zylinderreihen, mit jeweiligen Zylindern zugeordneten Kühlmittelmänteln, wobei das Kühlmittel aus den Kühlmittelmänteln in jeweilige Zylinderköpfe und aus diesen über jeweilige Kühlmittelabströmöffnungen zurück in das Zylinderkurbelgehäuse in einen im V-Raum angeordneten Kühlmittelrücklaufkanal fließt und wobei in dem V-Raum eine mit dem Kühlmittelrücklaufkanal und den Kühlmittelabströmöffnungen der Zylinderköpfe verbundene Mischkammer unmittelbar benachbart zu einer Aussenwandung der Kühlmittelmäntel der Zylinder ausgebildet ist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an internal combustion engine having a plurality of water-cooled and V-shaped cylinders of a cylinder crankcase, in particular of a motor vehicle, with a trained V V-space between the V-forming cylinder rows, associated with respective cylinders coolant shells, wherein the coolant from the coolant shells into respective Cylinder heads and flows from these via respective Kühlmittelabströmöffnungen back into the cylinder crankcase in a arranged in V-space coolant return passage and wherein in the V space connected to the coolant return passage and the Kühlmittelabströmöffnungen the cylinder heads mixing chamber immediately adjacent to an outer wall of the coolant jacket of the cylinder is formed according to the preamble of claim 1.

Eine Gattungsgemäße Brennkraftmaschine ist aus der DE 40 01 140 C1 bekannt. Hierbei sind gemeinsame Kühlmittel-Zuleitungen und Kühlmittel-Abführungen, von denen die Leitungen für die einzelnen Zylinder abzweigen, im inneren freien V-Winkel des Zylinderblocks als in Zylinderblocklängsrichtung nebeneinander liegende, zum offenen V-Ende offene, durch einen Deckel verschließbare Kanäle ausgebildet.A generic internal combustion engine is known from DE 40 01 140 C1. In this case, common coolant supply lines and coolant discharges, from which branch off the lines for each cylinder, formed in the inner free V-angle of the cylinder block as in the cylinder block longitudinal direction adjacent, open to the V-end, closable by a lid channels.

Aus der EP 0 637 682 B1 ist eine wassergekühlte mehrzylindrige Brennkraftmaschine mit V-förmig angeordneten Zylinderreihen bekannt, wobei im V-Raum fächerartig nebeneinander liegend von innen nach außen gesehen folgendes ausgebildet ist, ein Wasservorlauf, Pumpenaufnahmebohrungen für jeweilige Kraftstoff-Einspritzpumpen, Kühlmittellängskanäle, Ventilstößelführungen und Kühlmittelmäntel der Zylinder. All dies ist jedoch einstückig mit dem Zylinderkurbelgehäuse ausgebildet, so dass diese Anordnung in der Herstellung aufwendig und teuer ist.EP 0 637 682 B1 discloses a water-cooled multi-cylinder internal combustion engine with cylinder rows arranged in a V-shaped manner, wherein the following is formed in the V-space in a fan-like manner next to one another from inside to outside, a water feed, pump receiving bores for respective fuel injection pumps, longitudinal coolant ducts, valve tappet guides and coolant jackets of the cylinders. All this, however, is formed integrally with the cylinder crankcase, so that this arrangement is complicated and expensive to manufacture.

Aus der JP-7259559 A ist es bekannt, bei einem Motor mit V-förmiger Zylinderanordnung einen separaten Kühlwasserkanal in einem V-Raum anzuordnen. Bei dieser Anordnung fließt jedoch das Kühlwasser in dem separaten Kanal zunächst vollständig an den Zylindern vorbei und wird erst stirnseitig am Motorblock in das Zylinderkurbelgehäuse eingeleitet und fließt anschließend durch die Kühlmittelmäntel der Zylinder den vollständigen Weg durch das Zylinderkurbelgehäuse zurück. Diese Anordnung hat den Nachteil, dass die Zylinder ungleichmäßig gekühlt werden, da die stirnseitigen Zylinder von relativ kühlem Wasser umspült werden, die letzten von der Stirnseite des Motorblocks abgewandt angeordneten Zylinder jedoch von Kühlwasser umspült werden, welches bereits von den vorhergehenden Zylinder erheblich vorgewärmt wurde.From JP-7259559 A it is known to arrange a separate cooling water channel in a V-space in an engine with a V-shaped cylinder arrangement. In this arrangement, however, the cooling water in the separate channel initially flows completely to the cylinders past and is first introduced into the front side of the engine block in the cylinder crankcase and then flows through the coolant jackets of the cylinder the full way back through the cylinder crankcase. This arrangement has the disadvantage that the cylinders are cooled unevenly, since the front-side cylinders are surrounded by relatively cool water, the last arranged away from the end face of the engine block cylinders are surrounded by cooling water, which has already been preheated considerably by the previous cylinder.

Die DE 41 36 773 C1 beschreibt ein Verteilergehäuse für eine V-Brennkraftmaschine, wobei im V-Raum ein Verteilergehäuse mit einer ebenen Grundplatte an einem Flansch des Kurbelgehäuses der Brennkraftmaschine gehalten angeordnet ist. Dieses Verteilergehäuse integriert eine Vielzahl von üblicherweise von separat angeordneten Bauteilen übernommenen Funktionen. Das Verteilergehäuse führt dabei insbesondere Kühlwasserströme der Brennkraftmaschine, wobei jedoch lediglich Anschlussflansche zur Verfügung gestellt werden und die Kühlmittelkanäle selbst vollständig im Zylinderkurbelgehäuse auszubilden sind. Lediglich ein Wasserführungsgehäuse ist vollständig im Verteilergehäuse ausgebildet, welches jedoch lediglich als Aufnahme für einen Thermostaten und eine Wasserpumpe dient und keinerlei Verteilungsfunktion für das Kühlwasser erfüllt.DE 41 36 773 C1 describes a distributor housing for a V-type internal combustion engine, wherein a distributor housing is arranged with a flat base plate held on a flange of the crankcase of the internal combustion engine in the V-space. This distributor housing integrates a variety of commonly accepted by separately arranged components functions. The distributor housing in particular leads cooling water flows of the internal combustion engine, but only connecting flanges are provided and the coolant channels themselves are to be formed completely in the cylinder crankcase. Only a water guide housing is completely formed in the distributor housing, which, however, serves only as a receptacle for a thermostat and a water pump and does not fulfill any distribution function for the cooling water.

Aus der DE-OS-2 015 546 ist ein Verbrennungsmotor mit V-förmig angeordneten Zylinderreihen bekannt, wobei jeweilige Kühlmäntel von Zylinderblock und Zylinderkopf miteinander in Verbindung stehen. Ferner ist im V-Raum ein Mehrfachanschlussstück angeordnet, welches Kanäle für eine Zufuhr eines Kraftstoff-Luftgemisches und für eine Abfuhr von Abgasen sorgen. An einem Ende des Mehrfachanschlussstückes sind Anschlüsse für Kühlmittelkanäle vorgesehen. Durch die Ausführung in mehreren diskreten Elementen ist diese Anordnung jedoch in der Herstellung und Montage kompliziert und Kostenintensiv. Ferner strömt das Kühlmittel an einer Seite aus einem Teil des Mehrfachanschlussstückes in den Zylinderblock ein, durchquert diesen entlang der Zylinderkopfreihen vollständig und strömt erst danach wieder aus dem Zylinderblock aus in ein anderes Teil des Mehrfachanschlussstückes. Dadurch ergibt sich auch hier das oben bereits erwähnte Problem einer ungleichmäßigen Kühlung des Zylinderblockes.From DE-OS-2 015 546 an internal combustion engine having V-shaped rows of cylinders is known, wherein respective cooling jackets of cylinder block and cylinder head are in communication. Furthermore, a multiple connection piece is arranged in the V-space, which channels provide for a supply of a fuel-air mixture and for a discharge of exhaust gases. Connections for coolant channels are provided at one end of the multiple connection piece. However, by performing in a plurality of discrete elements, this arrangement is complicated and costly to manufacture and assemble. Further, the coolant flows on one side from a part of the multi-fitting into the cylinder block, completely traverses it along the cylinder head rows and only then flows out of the cylinder block into another part of the multi-fitting. This also results in the above-mentioned problem of uneven cooling of the cylinder block.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine verbesserte Brennkraftmaschine der obengenannten Art zur Verfügung zu stellen, wobei die obengenannten Nachteile überwunden werden und für das Kühlmittelsystem eine kompakte Bauweise und optimale Nutzung des V-Raumes erzielt wird.The present invention is therefore based on the object to provide an improved internal combustion engine of the type mentioned above, wherein the above-mentioned disadvantages are overcome and for the coolant system, a compact design and optimum use of the V-space is achieved.

Diese Aufgabe wird erfindungsgemäß durch eine Brennkraftmaschine der o.g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved by an internal combustion engine o.g. Art solved with the features characterized in claim 1. Advantageous embodiments of the invention are specified in the dependent claims.

Dazu ist es erfindungsgemäß vorgesehen, dass die Mischkammer an einer an den V-Raum angrenzenden Seite offen ausgebildet ist, wobei ein Deckel derart angeordnet ist, dass dieser im V-Raum einen Kühlmittelzulaufkanal bildet und ein Mittel zum wahlweisen Verbinden des Kühlmittelzulaufkanals mit der Mischkammer vorgesehen ist.For this purpose, it is provided according to the invention that the mixing chamber is open on a side adjacent to the V-space side, wherein a cover is arranged such that it forms a coolant inlet channel in the V-space and provides a means for selectively connecting the coolant inlet channel with the mixing chamber is.

Dies hat den Vorteil, dass durch die benachbarte Strömung des Kühlwassers in der Mischkammer und den Kühlmittelmänteln der Zylinder eine homogenere Temperaturverteilung im Kühlmittelsystem des Zylinderkurbelgehäuses erfolgt, was zu einer gleichmäßigeren Kühlung der Brennkraftmaschine führt.This has the advantage that due to the adjacent flow of the cooling water in the mixing chamber and the coolant shells of the cylinder a more homogeneous temperature distribution in the coolant system of the cylinder crankcase takes place, which leads to a more uniform cooling of the internal combustion engine.

Ferner erzielt man dadurch auf einfache Weise mit gleichzeitig kleinem Bauraumbedarf ein Kühlmittelführungssystem durch einfaches Aufsetzten eines Deckels auf den V-Raum. Gleichzeitig ist sofort und ohne zusätzliche Maßnahmen ein Bypass eines im Kühlkreislauf angeordneten Kühlers ausgebildet, so dass in Betriebsphasen, in denen die Brennkraftmaschine nicht eine vorbestimmte Betriebstemperatur hat, der Kühler überbrückt und dadurch schnell die vorbestimmte Betriebstemperatur erstmals oder wieder erreicht werden kann. Ferner sind Seitenwandungen der Kühlmittelkanäle kombiniert aus Deckelelementen und Zylinderkopfgehäuse-Elementen zusammengesetzt, was eine weitere Vereinfachung der Anordnung bzw. der Montage und auch späterer ggf. erforderlicher Wartungsarbeiten ergibt. Die Mischkammer und der Kühlmittelzulaufkanal sind nämlich durch einfaches demontieren des Deckels jederzeit zu Wartungs- oder Prüfzwecken zugänglich.Furthermore, it achieves this in a simple manner with a small space requirement, a coolant supply system by simply placing a lid on the V-space. At the same time, a bypass of a cooler arranged in the cooling circuit is formed immediately and without additional measures, so that in operating phases in which the internal combustion engine does not have a predetermined operating temperature, the radiator bridges and thereby quickly the predetermined operating temperature can be achieved for the first time or again. Further, side walls of the coolant channels are combined composed of cover elements and cylinder head housing elements, resulting in a further simplification of the arrangement or assembly and also later possibly required maintenance. Namely, the mixing chamber and the coolant inlet channel are accessible at any time for maintenance or test purposes by simply disassembling the lid.

Eine einfache und kostengünstige Anordnung wird dadurch erzielt, dass das Mittel zum wahlweisen Verbinden des Kühlmittelzulaufkanals mit der Mischkammer ein Kennfeldthermostat ist.A simple and inexpensive arrangement is achieved in that the means for selectively connecting the coolant supply channel with the mixing chamber is a map thermostat.

Eine W-förmige Anordnung der Zylinder mit entsprechend kompakter Bauweise der Brennkraftmaschine erzielt man dadurch, dass zwei Zylinderreihen der V-förmigen Anordnung jeweils selbst wiederum V-förmig angeordnet sind.A W-shaped arrangement of the cylinder with a correspondingly compact design of the internal combustion engine is achieved in that two rows of cylinders of the V-shaped arrangement are each themselves in turn arranged V-shaped.

In einer vorteilhafte Ausführungsform ist der Deckel ferner derart ausgebildet, dass er integral einen Kühlmittelzulauf aufweist, welcher mit dem vom Deckel verschlossenen V-Raum verbunden ist, und in bevorzugter Weise ist der Deckel zusätzlich derart ausgebildet, dass er integral den mit der Mischkammer verbundenen Kühlmittelrücklaufkanal aufweist. Dies hat den Vorteil, dass mit einem Handgriff, nämlich dem Aufsetzten des Deckels, das vollständige externe Kühlmittelführungssystem des Motorblockes montiert ist.In an advantageous embodiment, the lid is further formed to integrally have a refrigerant inlet connected to the V-space closed by the lid, and preferably, the lid is additionally formed so as to integrally connect the refrigerant return passage connected to the mixing chamber having. This has the advantage that with a handle, namely the touchdown of the lid, the complete external coolant supply system of the engine block is mounted.

Zweckmäßigerweise ist am Deckel zusätzlich ein Temperatursensor angeordnet, welcher in den Kühlmittelrücklaufkanal hinein ragt.Conveniently, a temperature sensor is additionally arranged on the cover, which protrudes into the coolant return channel.

Weitere Merkmale, Vorteile und vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen, sowie aus der nachstehenden, beispielhaften Beschreibung der Erfindung anhand der beigefügten Zeichnungen. Diese zeigen in

Fig. 1
eine bevorzugte Ausführungsform einer erfindungsgemäßen Brennkraftmaschine im Querschnitt und in
Fig. 2
im Längsschnitt.
Further features, advantages and advantageous embodiments of the invention will become apparent from the dependent claims, and from the following, exemplary description of the invention with reference to the accompanying drawings. These show in
Fig. 1
a preferred embodiment of an internal combustion engine according to the invention in cross-section and in
Fig. 2
in longitudinal section.

Fig. 1 zeigt beispielhaft eine Brennkraftmaschine 10 mit einer W-förmigen Zylinderanordnung von Zylindern 12, 14, 16 und 18 in einem Zylinderkurbelgehäuse 20. Die Brennkraftmaschine 10 umfasst ferner jeweilige Zylinderköpfe 22 und 24, Kühlmittelmäntel 26 und 28, Kühlmittelzuströmöffnungen 30, über die Kühlmittel in Pfeilrichtung 31 in die Zylinderköpfe 22, 24 strömt, und Kühlmittelabströmöffnungen 32, über die Kühlmittel von den Zylinderköpfen 22, 24 in Pfeilrichtung 33 wieder abströmt.1 shows by way of example an internal combustion engine 10 with a W-shaped cylinder arrangement of cylinders 12, 14, 16 and 18 in a cylinder crankcase 20. The internal combustion engine 10 further comprises respective cylinder heads 22 and 24, coolant jackets 26 and 28, coolant inflow openings 30 via the coolant flows in the direction of arrow 31 in the cylinder heads 22, 24, and Kühlmittelabströmöffnungen 32, flows through the coolant from the cylinder heads 22, 24 in the direction of arrow 33 again.

In einem V-Raum 35 ist eine Mischkammer 34 durch integral mit dem Zylinderkurbelgehäuse gebildete Wandungen 36 und durch Wandungen 38 der Kühlmittelmäntel 26, 28 begrenzt. Die Mischkammer 34 weist ferner an einer dem V-Raum 35 zugewandten Seite eine Öffnung 40 auf. Ein Deckel 42 verschließt den V-Raum 35 und bildet so in diesem einen Kühlmittelzulaufkanal 44 aus. Der Deckel 42 umfasst zusätzlich ein Mittel 46, beispielsweise in Form eines Kennfeldthermostaten, welches die Öffnung 40 wahlweise öffnet oder schließt und somit wahlweise die Mischkammer 34 mit dem Kühlmittelzulaufkanal 44 verbindet.In a V-space 35, a mixing chamber 34 is bounded by walls 36 integrally formed with the cylinder crankcase and by walls 38 of the coolant jackets 26, 28. The mixing chamber 34 further has an opening 40 on a side facing the V-space 35. A cover 42 closes the V-space 35 and thus forms in this a coolant inlet channel 44. The cover 42 additionally comprises a means 46, for example in the form of a map thermostat, which opens or closes the opening 40 selectively and thus selectively connects the mixing chamber 34 with the coolant inlet channel 44.

In die Mischkammer 34 fließt Kühlmittel über die Kühlmittelabströmöffnungen 32 aus den Zylinderköpfen 22, 24 ein. Wie sich weiter aus Fig. 2 ergibt, ist die Mischkammer 34 zusätzlich mit einem Kühlmittelrücklaufkanal 48 verbunden, über den das Kühlmittel zu einem nicht dargestellten Wärmetauscher, beispielsweise in Form eines Kühlers, abfließt. Andererseits fließt Kühlmittel zumindest teilweise unter Umgehung des Kühlers direkt in den Kühlmittelzulaufkanal 44, wenn das Mittel 46 die Öffnung 40 freigibt, wie dies mit einem Pfeil angedeutet ist. Über den Kühlmittelzulaufkanal 44 wird das Kühlmittel mittels Kanälen 50 jeweils zu Zylindern bzw. deren Kühlmittelmänteln geleitet. Beispielsweise bei einem 8-Zylinder-W-Motor ist einer der Kanäle 50 mit den Kühlmittelmänteln 26 der Zylinder 1 bis 4 und der entsprechend andere Kanal 50 mit den Kühlmittelmänteln 28 der Zylinder 5 bis 8 verbunden. Der Kühlmittelrücklaufkanal 48 und ein Kühlmittelzulauf 52 sind integral mit dem Deckel 42 ausgebildet, so dass durch einfaches Aufsetzten des Deckels 42 auf den V-Raum 35 mit einem Handgriff automatisch und ohne weitere Maßnahmen Kühlmittelzulauf 52, Kühlmittelzulaufkanal 44, Mischkammer 34 mit wahlweise freigebbarer Öffnung 40 und Kühlmittelrücklaufkanal 48 ausgebildet sind.Coolant flows into the mixing chamber 34 via the coolant outflow openings 32 from the cylinder heads 22, 24. As further shown in Fig. 2, the mixing chamber 34 is additional connected to a coolant return passage 48, via which the coolant flows to a heat exchanger, not shown, for example in the form of a radiator. On the other hand, coolant flows at least partially bypassing the radiator directly into the coolant inlet channel 44 when the means 46 releases the opening 40, as indicated by an arrow. Via the coolant inlet channel 44, the coolant is passed by means of channels 50 respectively to cylinders or their coolant shells. For example, in the case of an 8-cylinder W engine, one of the channels 50 is connected to the coolant jackets 26 of the cylinders 1 to 4 and the corresponding other passage 50 is connected to the coolant jackets 28 of the cylinders 5 to 8. The coolant return channel 48 and a coolant inlet 52 are integrally formed with the lid 42 so that by simply placing the lid 42 on the V-space 35 with a handle automatically and without further measures coolant inlet 52, coolant inlet channel 44, mixing chamber 34 with optional releasable opening 40th and coolant return channel 48 are formed.

Der Deckel 42 umfasst zusätzlich einen Temperatursensor 54, welcher in den Kühlmittelrücklaufkanal 44 hinein ragt und die dortige Temperatur des Kühlmittels bestimmt und in Abhängigkeit von dieser Temperatur das Mittel 46 zum wahlweisen Öffnen oder Schließen der Öffnung 40 ansteuert.The lid 42 additionally comprises a temperature sensor 54, which projects into the coolant return passage 44 and determines the local temperature of the coolant and, depending on this temperature, drives the means 46 for selectively opening or closing the opening 40.

Eine stirnseitig angeordnete Kühlmittelpumpe 56 sorgt ferner für einen entsprechenden Kühlmittelfluss. Hierbei tritt das Kühlmittel über die Kühlmittelpumpe 56 in das Zylinderkurbelgehäuse 20 ein und wird dort auf die Kühlmittelmäntel 26 und 28 der Zylinder 12 bis 18 verteilt. Anschließend strömt das Kühlmittel über eine Zylinderkopfdichtung 58 (Fig. 1) und die Kühlmittelzuströmöffnungen 30 in Pfeilrichtung 31 in die Zylinderköpfe 22 und 24 ein, durchquert diese in einer Querströmung und strömt weiter über Kühlmittelabströmöffnungen 32 unterhalb von Einlassflanschen 60 der Zylinderköpfe 22 und 24 wiederum über die Zylinderkopfdichtung 58 in die Mischkammer 34 und gelangt somit wieder in das Zylinderkurbelgehäuse 20. Diese Anordnung vermeidet einen stirnseitigen Austritt des Kühlmittels aus den Zylinderköpfen. Der Deckel 42 hat dabei eine Mehrfachfunktion: Er nimmt den Thermostaten 46 auf, verschließt den V-Raum 35 und nimmt gleichzeitig den Temperatursensor 54 auf und bildet integral einen Stutzen 62 für den Kühlervorlauf und einen Stutzen 64 für den Kühlerrücklauf. A front side arranged coolant pump 56 also ensures a corresponding coolant flow. In this case, the coolant enters the cylinder crankcase 20 via the coolant pump 56 and is distributed there to the coolant jackets 26 and 28 of the cylinders 12 to 18. Subsequently, the coolant flows via a cylinder head gasket 58 (FIG. 1) and the coolant inflow openings 30 into the cylinder heads 22 and 24 in the direction of arrow 31, traverses them in a transverse flow and then flows on via coolant outflow openings 32 below inlet flanges 60 of the cylinder heads 22 and 24 again the cylinder head gasket 58 into the mixing chamber 34 and thus returns to the cylinder crankcase 20. This arrangement avoids a front-side outlet of the coolant from the cylinder heads. The lid 42 has a multiple function: it receives the thermostat 46, closes the V-space 35 and at the same time receives the temperature sensor 54 and integrally forms a nozzle 62 for the radiator feed and a nozzle 64 for the radiator return.

Claims (6)

  1. Internal combustion engine (10), having a plurality of water-cooled cylinders (12, 14, 16, 18), arranged in a V shape, of a cylinder block (20), in particular of a motor vehicle, having a V-shaped space (35) in the V between the rows of cylinders forming the V, having coolant galleries (26, 28) associated with respective cylinders (12, 14, 16, 18), with the coolant flowing from the coolant galleries (26, 28) into respective cylinder heads (22, 24) and from these through respective coolant outflow openings (32) back into the cylinder block (20) and into a coolant return duct (48) arranged in the V-shaped space (35), and with a mixing chamber (34) which is connected to the coolant return duct (48) and the coolant outflow openings (32) of the cylinder heads (22, 24) being constructed to be directly adjacent, in the V-shaped space (35), to an outside wall (38) of the coolant galleries (26, 28) of the cylinders (12, 14, 16, 18), characterized in that the mixing chamber (34) is constructed to be open on a side adjoining the V-shaped space (35), with a cover (42) arranged such that the latter forms a coolant inflow duct (44) in the V-shaped space (35), and a means (46) for optionally connecting the coolant inflow duct (44) to the mixing chamber (34) is provided.
  2. Internal combustion engine (10) according to Claim 1, characterized in that the means (46) for optionally connecting the coolant inflow duct (44) to the mixing chamber (34) is a map-controlled thermostat.
  3. Internal combustion engine (10) according to either of the preceding claims, characterized in that two cylinder rows of the V-shaped arrangement are each themselves arranged in a V shape.
  4. Internal combustion engine (10) according to one of the preceding claims, characterized in that the cover (42) is furthermore constructed such that it has integral therewith a coolant inflow line (52) which is connected to the V-shaped space (35) closed off by the cover (42).
  5. Internal combustion engine (10) according to one of the preceding claims, characterized in that the cover (42) is furthermore constructed such that it has integral therewith the coolant return duct (48) connected to the mixing chamber (34).
  6. Internal combustion engine (10) according to one of the preceding claims, characterized in that in addition a temperature sensor (54) is arranged on the cover (42) and projects into the coolant return duct (48).
EP19980124469 1998-01-31 1998-12-23 Internal combustion engine Expired - Lifetime EP0933510B1 (en)

Applications Claiming Priority (2)

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DE19803808 1998-01-31
DE1998103808 DE19803808A1 (en) 1998-01-31 1998-01-31 Internal combustion engine

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EP0933510A3 EP0933510A3 (en) 2002-02-06
EP0933510B1 true EP0933510B1 (en) 2006-11-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10020485A1 (en) * 2000-04-26 2001-11-08 Bayerische Motoren Werke Ag Cooling system for a liquid-cooled internal combustion engine
DE10021525A1 (en) 2000-05-03 2001-11-15 Porsche Ag Cooling circuit for a multi-cylinder internal combustion engine
DE10021526C2 (en) * 2000-05-03 2002-07-18 Porsche Ag Arrangement for cooling a multi-cylinder internal combustion engine
DE10117090B4 (en) 2001-04-06 2013-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Water-cooled, multi-cylinder internal combustion engine
DE10129933B4 (en) * 2001-06-21 2013-08-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Water-cooled internal combustion engine, in particular for motorcycles
JP4858718B2 (en) 2007-12-13 2012-01-18 本田技研工業株式会社 Engine coolant passage structure

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US1862723A (en) * 1929-10-07 1932-06-14 Gen Motors Corp V-type engine
GB1279132A (en) 1969-04-02 1972-06-28 Chrysler United Kingdom Ltd Fo Improvements in or relating to internal combustion engines
JPS59224444A (en) * 1983-06-03 1984-12-17 Mazda Motor Corp Cooling device of v-engine
DE3326317A1 (en) * 1983-07-21 1985-01-31 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart CYLINDER BLOCK
DE4001140C1 (en) * 1990-01-17 1991-04-11 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Cylinder block for liquid cooled IC engine - has coolant channels in internal angle of V=shaped block
DE4136773C1 (en) 1991-11-08 1992-12-17 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De Distributor housing for IC V-engine - has flat baseplate with top and bottom coupling plane, with latter releasably flanged to crankcase
DE4326159C5 (en) 1993-08-04 2006-01-19 Daimlerchrysler Ag Water-cooled multi-cylinder internal combustion engine with V-shaped rows of cylinders
JP3392512B2 (en) 1994-03-22 2003-03-31 本田技研工業株式会社 V-type engine cooling system

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DE19803808A1 (en) 1999-08-05
EP0933510A3 (en) 2002-02-06
EP0933510A2 (en) 1999-08-04
DE59813786D1 (en) 2006-12-14

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