EP1849973B1 - Coolant loop for a combustion engine - Google Patents

Coolant loop for a combustion engine Download PDF

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Publication number
EP1849973B1
EP1849973B1 EP20070005564 EP07005564A EP1849973B1 EP 1849973 B1 EP1849973 B1 EP 1849973B1 EP 20070005564 EP20070005564 EP 20070005564 EP 07005564 A EP07005564 A EP 07005564A EP 1849973 B1 EP1849973 B1 EP 1849973B1
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EP
European Patent Office
Prior art keywords
coolant
pump
crankcase
combustion engine
thermostatic valve
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EP20070005564
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German (de)
French (fr)
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EP1849973A1 (en
Inventor
Vojin Subasic
Christian Hiemesch
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/007—Adaptations for cooling
    • 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
    • F01P5/12—Pump-driving arrangements
    • F01P2005/125—Driving auxiliary pumps electrically

Definitions

  • the invention relates to a coolant circuit for an internal combustion engine with the features of the preamble of patent claim 1.
  • a coolant circuit for a V-type internal combustion engine having a crankcase, a coolant pump in a pump housing, and a thermostatic valve in a thermostatic valve housing.
  • the pump housing and the thermostatic valve housing are mounted to the crankcase, wherein the crankcase has a coolant channel, which connects the pump housing and the thermostatic valve housing coolant leading together.
  • coolant flow is supplied depending on the temperature of the feed wheel of the coolant pump.
  • a coolant leading portion for cooling the six cylinders of the internal combustion engine is provided, which surrounds each of the cylinders individually, wherein the range extends in the V of the crankcase.
  • Object of the present invention is to show a coolant circuit, which is structurally simplified and allows a lower overall height of the internal combustion engine.
  • the inventive design space is mainly installed in the lower part of the engine, which is gained in the upper area of space.
  • the motor vehicle bodies can be made aerodynamic or a passive pedestrian protection can be improved by more crumple zone.
  • the coolant pump and the thermostatic valve are arranged in the immediate vicinity of the coolant flow areas of the internal combustion engine, which is kept low during warm-up, so in the small coolant circuit, the required amount of coolant for rapid heating of the engine. This can ultimately be kept short in an advantageous manner, the warm-up phase, which has a positive effect on the friction of the engine and thus also has a favorable effect on fuel consumption.
  • the coolant pump can be driven mechanically and / or electrically or hydraulically.
  • the optimum drive can be used for the construction according to the invention.
  • Fig. 1 shows a horizontal section through a coolant pump 2 with an adjacent crankcase 1 of an inventively constructed Engine.
  • a pump housing 2 'and a thermostatic valve housing 3' are mounted to the crankcase 1.
  • a thermostatic valve 3 is arranged in the thermostatic valve housing 3.
  • the pump housing 2' and the thermostatic valve housing 3 ' are in one piece and of the same material in the present exemplary embodiment.
  • a belt pulley 5 for a poly-V belt drive is arranged coaxially around it.
  • a coolant channel 4 which connects the thermostatic valve housing 3 'with the pump housing 2' leading coolant.
  • the coolant pump 2 is driven via a belt pulley 5 arranged radially outside to a bearing 6 of a delivery wheel 2 "of the coolant pump 2.
  • the delivery wheel 2" conveys a coolant radially outwards into coolant channels, which are driven by the internal combustion engine, i. H. are guided by the crankcase and the cylinder head. Subsequently, the heated coolant is conveyed by further coolant channels and hoses, not shown, to a heat exchanger, also not shown, and to the thermostatic valve 3.
  • the thermostatic valve 3 forms a small coolant circuit or a large coolant circuit or a mixed form of both.
  • the coolant flow from the thermostatic valve 3 to the coolant pump 2 is shown schematically in the coolant channel 4 with arrows.
  • Fig. 2 is a vertical section through the coolant pump 2 and the crankcase 1 of the inventively designed engine shown. Out Fig. 2 is clearly visible how the coming of the thermostatic valve 3 coolant is conveyed through the coolant channel 4 in the crankcase 1 axially to the feed wheel 2 'of the coolant pump 2 and is then further transported radially outward.
  • the coolant flow is as already in Fig. 1 represented schematically by arrows.
  • a spiral-shaped housing, from which it is conveyed by dashed coolant channels further in the direction of the areas of the internal combustion engine, crankcase and cylinder head to be cooled, is arranged radially outside the conveying wheel 2 " 1 are arranged largely geodetically above the coolant channel 4.
  • FIG. 3 is again the horizontal section through the crankcase 1 and the coolant pump 2 accordingly Fig. 1 shown again in three dimensions. All versions too Fig. 1 and Fig. 2 thus also apply to Fig. 3 ,
  • the pump housing 2 'and the thermostatic valve housing 3' as described above, made in one piece, but they can be designed as a separate machine housing.
  • a mechanical drive d. H. in the present case with a poly-V belt drive via a pulley 5
  • an electric or hydraulic or a combined electromechanical drive of the coolant pump 2 is also possible.
  • the storage of the feed wheel 2 "takes place in the pump housing 2 'with the advantage that leakage through the storage in the dry region of the coolant pump 2 in the event of a defect is avoided.

Description

Die Erfindung betrifft einen Kühlmittelkreislauf für eine Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1.The invention relates to a coolant circuit for an internal combustion engine with the features of the preamble of patent claim 1.

Zum technischen Umfeld der Erfindung wird beispielsweise auf die WO 96/03574 A1 hingewiesen, aus der ein Kühlmittelkreislauf für eine Brennkraftmaschine mit einem Kurbelgehäuse, mit einer Kühlmittelpumpe in einem Pumpengehäuse und einem Thermostatventil in einem Thermostatventilgehäuse bekannt ist, wobei das Pumpengehäuse und das Thermostatventilgehäuse einstückig sind. Dieses einstückige Gehäuse ist an den Zylinderkopf der Brennkraftmaschine montiert, wobei Kühlmittelkanäle zur Kühlung des Zylinderkopfes und des Kurbelgehäuses vorgesehen sind. Mit dem Thermostatventil wird ein Kühlmittelstrom temperaturabhängig dem Förderrad der Kühlmittelpumpe zugeführt.The technical environment of the invention, for example, on the WO 96/03574 A1 reference is made, from which a coolant circuit for an internal combustion engine with a crankcase, with a coolant pump in a pump housing and a thermostatic valve in a thermostatic valve housing is known, wherein the pump housing and the thermostatic valve housing are in one piece. This one-piece housing is mounted on the cylinder head of the internal combustion engine, wherein coolant channels are provided for cooling the cylinder head and the crankcase. With the thermostatic valve, a coolant flow is supplied depending on the temperature of the delivery wheel of the coolant pump.

Aus der US 4,493,294 A ist Kühlmittelkreislauf für eine Brennkraftmaschine der V-Bauart mit einem Kurbelgehäuse, mit einer Kühlmittelpumpe in einem Pumpengehäuse und einem Thermostatventil in einem Thermostatventilgehäuse bekannt. Das Pumpengehäuse und das Thermostatventilgehäuse sind an das Kurbelgehäuse montiert, wobei das Kurbelgehäuse einen Kühlmittelkanal aufweist, der das Pumpengehäuse und das Thermostatventilgehäuse Kühlmittel führend miteinander verbindet. Mit dem Thermostatventil wird ein aus einem Wärmetauscher und/oder aus der Brennkraftmaschine kommender Kühlmittelstrom temperaturabhängig dem Förderrad der Kühlmittelpumpe zugeführt. Im Kurbelgehäuse ist ein Kühlmittel führender Bereich zur Kühlung der sechs Zylinder der Brennkraftmaschine vorgesehen, der jeden der Zylinder einzeln umschließt, wobei sich der Bereich in das V des Kurbelgehäuses erstreckt.From the US 4,493,294 A For example, a coolant circuit is known for a V-type internal combustion engine having a crankcase, a coolant pump in a pump housing, and a thermostatic valve in a thermostatic valve housing. The pump housing and the thermostatic valve housing are mounted to the crankcase, wherein the crankcase has a coolant channel, which connects the pump housing and the thermostatic valve housing coolant leading together. With the thermostatic valve coming from a heat exchanger and / or from the internal combustion engine coolant flow is supplied depending on the temperature of the feed wheel of the coolant pump. In the crankcase, a coolant leading portion for cooling the six cylinders of the internal combustion engine is provided, which surrounds each of the cylinders individually, wherein the range extends in the V of the crankcase.

Nachteilig an der vorliegenden Ausgestaltung sind einerseits der große bauliche Aufwand von dem Thermostatventil und der Kühlmittelpumpe und andererseits die relativ große Bauhöhe der Brennkraftmaschine.A disadvantage of the present embodiment, on the one hand, the great structural complexity of the thermostatic valve and the coolant pump and on the other hand, the relatively large height of the internal combustion engine.

Aufgabe der vorliegenden Erfindung ist es, einen Kühlmittelkreislauf aufzuzeigen, der baulich vereinfacht ist und eine geringere Bauhöhe der Brennkraftmaschine zulässt.Object of the present invention is to show a coolant circuit, which is structurally simplified and allows a lower overall height of the internal combustion engine.

Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is solved by the features in the characterizing part of patent claim 1.

Durch die erfindungsgemäße Ausgestaltung wird Bauraum vor allem im unteren Bereich der Brennkraftmaschine verbaut, wodurch im oberen Bereich Platz gewonnen wird. Hierdurch können die Kraftfahrzeugkarosserien aerodynamischer ausgestaltet werden oder ein passiver Fußgängerschutz kann durch mehr Knautschzone verbessert werden.The inventive design space is mainly installed in the lower part of the engine, which is gained in the upper area of space. As a result, the motor vehicle bodies can be made aerodynamic or a passive pedestrian protection can be improved by more crumple zone.

Darüber hinaus sind die Kühlmittelpumpe und das Thermostatventil in unmittelbarer Nähe der kühlmitteldurchströmten Bereiche der Brennkraftmaschine angeordnet, wodurch im Warmlauf, also im kleinen Kühlmittelkreis, die erforderliche Kühlmittelmenge für ein schnelles Aufheizen der Brennkraftmaschine gering gehalten wird. Dadurch kann letztlich in vorteilhafter Weise die Warmlaufphase kurz gehalten werden, was sich positiv auf die Reibleistung der Brennkraftmaschine und somit auch günstig auf den Kraftstoffverbrauch auswirkt.In addition, the coolant pump and the thermostatic valve are arranged in the immediate vicinity of the coolant flow areas of the internal combustion engine, which is kept low during warm-up, so in the small coolant circuit, the required amount of coolant for rapid heating of the engine. This can ultimately be kept short in an advantageous manner, the warm-up phase, which has a positive effect on the friction of the engine and thus also has a favorable effect on fuel consumption.

Gemäß Patentanspruch 2 kann die Kühlmittelpumpe mechanisch und/oder elektrisch oder hydraulisch angetrieben werden. Somit kann je nach vorliegender Motorperipherie der optimale Antrieb für den erfindungsgemäßen Aufbau verwendet werden.According to claim 2, the coolant pump can be driven mechanically and / or electrically or hydraulically. Thus, depending on the existing engine periphery, the optimum drive can be used for the construction according to the invention.

Durch die Förderung des Kühlmittels gemäß Patentanspruch 3 wird eine Platz sparende Bauweise erzielt.By promoting the coolant according to claim 3, a space-saving design is achieved.

Durch die Ausgestaltung gemäß Patentanspruch 4 befindet sich die Lagerung des Förderrades der Kühlmittelpumpe im sog. "trockenen Bereich". Undichtigkeiten durch ein defektes Lager werden somit vermieden.Due to the configuration according to claim 4, the storage of the delivery wheel of the coolant pump is in the so-called. "Dry area". Leaks due to a defective bearing are thus avoided.

Im Folgenden ist die Erfindung anhand von drei Figuren an einem einzigen bevorzugten Ausführungsbeispiel näher erläutert:

Fig. 1
zeigt einen horizontalen Schnitt durch eine Kühlmittelpumpe mit einem angrenzenden Kurbelgehäuse einer erfindungsgemäß ausgestalteten Brennkraftmaschine;
Fig. 2
zeigt einen vertikalen Schnitt durch die Kühlmittelpumpe und das angrenzende Kurbelgehäuse;
Fig. 3
zeigt den horizontalen Schnitt von Fig. 1 in einer dreidimensionalen Darstellung.
The invention is explained in more detail below with reference to three figures in a single preferred embodiment:
Fig. 1
shows a horizontal section through a coolant pump with an adjacent crankcase of an inventively designed internal combustion engine;
Fig. 2
shows a vertical section through the coolant pump and the adjacent crankcase;
Fig. 3
shows the horizontal section of Fig. 1 in a three-dimensional representation.

Für die gleichen Bauteile in den Fig. 1 bis 3 gelten stets die gleichen Bezugszeichen.For the same components in the Fig. 1 to 3 the same reference numbers always apply.

Fig. 1 zeigt einen horizontalen Schnitt durch eine Kühlmittelpumpe 2 mit einem angrenzenden Kurbelgehäuse 1 einer erfindungsgemäß aufgebauten Brennkraftmaschine. An das Kurbelgehäuse 1 sind ein Pumpengehäuse 2' sowie ein Thermostatventilgehäuse 3' montiert. Das Pumpengehäuse 2' beinhaltet eine Kühlmittelpumpe mit einem Förderrad 2". In dem Thermostatventilgehäuse 3' ist ein Thermostatventil 3 angeordnet. Das Pumpengehäuse 2' und das Thermostatventilgehäuse 3' sind im vorliegenden Ausführungsbeispiel einstückig und materialeinheitlich. Fig. 1 shows a horizontal section through a coolant pump 2 with an adjacent crankcase 1 of an inventively constructed Engine. To the crankcase 1, a pump housing 2 'and a thermostatic valve housing 3' are mounted. The pump housing 2 'contains a coolant pump with a delivery wheel 2 ". A thermostatic valve 3 is arranged in the thermostatic valve housing 3. The pump housing 2' and the thermostatic valve housing 3 'are in one piece and of the same material in the present exemplary embodiment.

Zum Antrieb der Kühlmittelpumpe 2 ist koaxial um diese herum ein Riemenrad 5 für einen Poly-V-Riemenantrieb angeordnet.To drive the coolant pump 2, a belt pulley 5 for a poly-V belt drive is arranged coaxially around it.

Im Kurbelgehäuse 1 ist ein Kühlmittelkanal 4, der das Thermostatventilgehäuse 3' mit dem Pumpengehäuse 2' Kühlmittel führend verbindet. Beim Betrieb der Brennkraftmaschine wird die Kühlmittelpumpe 2 über ein radial au-ßen zu einer Lagerung 6 eines Förderrades 2" der Kühlmittelpumpe 2 angeordnetes Riemenrad 5 angetrieben. Das Förderrad 2" fördert ein Kühlmittel radial nach außen in Kühlmittelkanäle, die durch die Brennkraftmaschine, d. h. durch das Kurbelgehäuse und den Zylinderkopf geführt sind. Anschließend wird das aufgeheizte Kühlmittel durch weitere nicht dargestellte Kühlmittelkanäle und Schläuche zu einem ebenfalls nicht dargestellten Wärmetauscher und zum Thermostatventil 3 gefördert. Entsprechend der Kühlmitteltemperatur bildet das Thermostatventil 3 einen kleinen Kühlmittelkreislauf oder einen großen Kühlmittelkreislauf oder eine Mischform aus beiden. Der Kühlmittelstrom vom Thermostatventil 3 zur Kühlmittelpumpe 2 ist schematisch im Kühlmittelkanal 4 mit Pfeilen eingezeichnet.In the crankcase 1 is a coolant channel 4, which connects the thermostatic valve housing 3 'with the pump housing 2' leading coolant. During operation of the internal combustion engine, the coolant pump 2 is driven via a belt pulley 5 arranged radially outside to a bearing 6 of a delivery wheel 2 "of the coolant pump 2. The delivery wheel 2" conveys a coolant radially outwards into coolant channels, which are driven by the internal combustion engine, i. H. are guided by the crankcase and the cylinder head. Subsequently, the heated coolant is conveyed by further coolant channels and hoses, not shown, to a heat exchanger, also not shown, and to the thermostatic valve 3. Corresponding to the coolant temperature, the thermostatic valve 3 forms a small coolant circuit or a large coolant circuit or a mixed form of both. The coolant flow from the thermostatic valve 3 to the coolant pump 2 is shown schematically in the coolant channel 4 with arrows.

In Fig. 2 ist ein vertikaler Schnitt durch die Kühlmittelpumpe 2 und das Kurbelgehäuse 1 der erfindungsgemäß ausgestalteten Brennkraftmaschine dargestellt. Aus Fig. 2 ist gut erkennbar, wie das von dem Thermostatventil 3 kommende Kühlmittel durch den Kühlmittelkanal 4 im Kurbelgehäuse 1 axial zum Förderrad 2' der Kühlmittelpumpe 2 gefördert wird und anschließend radial nach außen weiterbefördert wird. Der Kühlmittelstrom ist wie bereits in Fig. 1 durch Pfeile schematisch dargestellt. Radial außen um das Förderrad 2" ist ein schneckenförmiges Gehäuse angeordnet, von welchem aus es durch gestrichelt dargestellte Kühlmittelkanäle weiter in Richtung der zu kühlenden Bereiche der Brennkraftmaschine, Kurbelgehäuse und Zylinderkopf, gefördert wird. Klar erkennbar ist auch, dass die zu kühlenden Bereiche im Kurbelgehäuse 1 weitgehend geodätisch oberhalb des Kühlmittelkanals 4 angeordnet sind.In Fig. 2 is a vertical section through the coolant pump 2 and the crankcase 1 of the inventively designed engine shown. Out Fig. 2 is clearly visible how the coming of the thermostatic valve 3 coolant is conveyed through the coolant channel 4 in the crankcase 1 axially to the feed wheel 2 'of the coolant pump 2 and is then further transported radially outward. The coolant flow is as already in Fig. 1 represented schematically by arrows. A spiral-shaped housing, from which it is conveyed by dashed coolant channels further in the direction of the areas of the internal combustion engine, crankcase and cylinder head to be cooled, is arranged radially outside the conveying wheel 2 " 1 are arranged largely geodetically above the coolant channel 4.

In Fig. 3 ist nochmals der horizontale Schnitt durch das Kurbelgehäuse 1 und die Kühlmittelpumpe 2 entsprechend Fig. 1 nochmals dreidimensional dargestellt. Sämtliche Ausführungen zu Fig. 1 und Fig. 2 gelten somit auch für Fig. 3.In Fig. 3 is again the horizontal section through the crankcase 1 and the coolant pump 2 accordingly Fig. 1 shown again in three dimensions. All versions too Fig. 1 and Fig. 2 thus also apply to Fig. 3 ,

Im vorliegenden Ausführungsbeispiel sind das Pumpengehäuse 2' und das Thermostatventilgehäuse 3', wie oben beschrieben, einstückig ausgeführt, sie können jedoch als separate Maschinengehäuse ausgeführt sein. Neben der Ausführung der Kühlmittelpumpe 2 mit einem mechanischen Antrieb, d. h. im vorliegenden Fall mit einem Poly-V-Riemenantrieb über ein Riemenrad 5, ist auch ein elektrischer oder hydraulischer oder ein kombiniert elektromechanischer Antrieb der Kühlmittelpumpe 2 möglich.In the present embodiment, the pump housing 2 'and the thermostatic valve housing 3', as described above, made in one piece, but they can be designed as a separate machine housing. In addition to the execution of the coolant pump 2 with a mechanical drive, d. H. in the present case with a poly-V belt drive via a pulley 5, an electric or hydraulic or a combined electromechanical drive of the coolant pump 2 is also possible.

Die Lagerung des Förderrades 2" erfolgt im Pumpengehäuse 2' mit dem Vorteil, dass durch die Lagerung im trockenen Bereich der Kühlmittelpumpe 2 im Fall eines Defekts eine Leckage vermieden wird.The storage of the feed wheel 2 "takes place in the pump housing 2 'with the advantage that leakage through the storage in the dry region of the coolant pump 2 in the event of a defect is avoided.

Durch die erfindungsgemäße Ausgestaltung werden gleichzeitig folgende vorteilhaften Ziele erreicht:

  • ➢ Die Kühlmittel führende Verbindung, der Kühlmittelkanal 4, zwischen dem Thermostatventilgehäuse 3' und dem Förderrad 2" ist erfindungsgemäß nicht im Pumpengehäuse 2' integriert, da sie zwischen dem Förderrad 2"und dem Riemenrad 5 zusätzlichen Bauraum benötigen würde, da diese Bauausführung die Länge der Kühlmittelpumpe 2 und somit auch die der Brennkraftmaschine vergrößern würde. Stattdessen verläuft der Kühlmittelkanal 4 im Kurbelgehäuse 1 stirnseitig weitgehend unterhalb des Brennkraftmaschinen-Wassermantels in einem bisher ungenutzten Bauraum und dient an dieser Stelle gleichzeitig zur Kühlung des Kurbelgehäuses.
  • ➢ Die Kühlmittelpumpe 2 und das Thermostatventil 3 sind in unmittelbarer Nähe der vom Kühlmittel durchströmten Bereiche der Brennkraftmaschine angeordnet, wodurch im Warmlauf, also im kleinen Kühlmittelkreislauf, die erforderliche Kühlmittelmenge gering gehalten wird. Dadurch kann letztlich die Warmlaufphase kurz gehalten werden, was sich positiv auf die Reibleistung der Brennkraftmaschine und somit auch günstig auf den Kraftstoffverbrauch auswirkt.
  • ➢ Die Kühlmittelpumpe 2 und das Thermostatventil 3 sind in einem kompakten Bereich genau zwischen dem nicht dargestellten Kühlmittelwärmetauscher und den vom Kühlmittel durchströmten Bereichen der Brennkraftmaschine angeordnet, wodurch die Verbindungsleitungen zu und vom Kühlmittelwärmetauscher in vorteilhafter Weise geometrisch einfach und gleichzeitig kurz ausgestaltet werden können.
  • ➢ Das Thermostatventil 3 ist in das Pumpengehäuse 2' der Kühlmittelpumpe 2 integriert, obwohl im Pumpengehäuse 2' keine kühlmittelführende Verbindung zwischen der Thermostatventilkammer und dem Förderrad 2" besteht. Der Integrationsgrad des Systems ist daher hoch, wodurch die Bauteileanzahl reduziert wird, beispielsweise wird nur eine einzige Dichtung zwischen dem gemeinsamen Pumpen/Thermostatventilgehäuse 2', 3' und dem Kurbelgehäuse 1 verwendet.
  • ➢ Des Weiteren entstehen durch die hohe Integration der Kühlmittel führenden Bauteile Vorteile beim Bauraumbedarf, der Montage und der Logistik.
  • ➢ Das Förderrad 2" ist so orientiert, dass die axiale Zuströmung aus Richtung Kurbelgehäuse 1 erfolgt, also bleibt nur einzige eine Gleitringdichtung auf einer Druckseite der Kühlmittelpumpe 2, was mehr Sicherheit gegen mangelnde Schmierung und Kühlung der Dichtung bedeutet.
The embodiment according to the invention simultaneously achieves the following advantageous goals:
  • ➢ The coolant-carrying connection, the coolant channel 4, between the thermostatic valve housing 3 'and the feed wheel 2 "according to the invention is not integrated in the pump housing 2', as they are between The conveyor wheel 2 "and the pulley 5 would require additional space, since this design would increase the length of the coolant pump 2 and thus also of the internal combustion engine Instead, the coolant passage 4 extends in the crankcase 1 front side largely below the engine water jacket in a previously unused space and serves at this point at the same time for cooling the crankcase.
  • ➢ The coolant pump 2 and the thermostatic valve 3 are arranged in the immediate vicinity of the flowed through by the coolant areas of the engine, which during warm-up, ie in the small coolant circuit, the required amount of coolant is kept low. As a result, ultimately, the warm-up phase can be kept short, which has a positive effect on the friction of the engine and thus also beneficial to fuel consumption.
  • ➢ The coolant pump 2 and the thermostatic valve 3 are arranged in a compact area exactly between the coolant heat exchanger, not shown, and the areas of the internal combustion engine through which the coolant flows, whereby the connection lines to and from the coolant heat exchanger can advantageously be made geometrically simple and short at the same time.
  • ➢ The thermostatic valve 3 is integrated in the pump housing 2 'of the coolant pump 2, although there is no coolant-carrying connection between the thermostatic valve chamber and the delivery wheel 2 "in the pump housing 2. The degree of integration of the system is therefore high, whereby the number of components is reduced, for example a single seal between the common pump / thermostatic valve housing 2 ', 3' and the crankcase 1 is used.
  • ➢ Furthermore, due to the high integration of the components carrying coolant, there are advantages in terms of space requirements, assembly and logistics.
  • ➢ The feed wheel 2 "is oriented so that the axial inflow takes place from the direction of the crankcase 1, so only one remains a mechanical seal on a pressure side of the coolant pump 2, which means more security against lack of lubrication and cooling of the seal.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1.1.
Kurbelgehäusecrankcase
2.Second
KühlmittelpumpeCoolant pump
2'2 '
Pumpengehäusepump housing
2"2 '
Förderradconveyor wheel
3.Third
Thermostatventilthermostatic valve
3'3 '
ThermostatventilgehäuseThermostatic valve housing
4.4th
KühlmittelkanalCoolant channel
5.5th
Riemenradpulley
6.6th
Lagerungstorage

Claims (4)

  1. A coolant circuit for an internal combustion engine comprising a crankcase (1), a coolant pump (2) in a pump casing (2') and a thermostat valve (3) in a thermostat valve casing (3'), wherein a flow of coolant from a heat exchanger and/or from the engine is supplied, dependent on temperature, by the thermostat valve (3) to a feed wheel (2") of the coolant pump (2), wherein the pump casing (2') and the thermostat valve casing (3') are mounted on the crankcase (1), wherein the crankcase (1) has a coolant duct (4) which conveys coolant and connects the pump casing (2') to the thermostat valve casing (3'), wherein a coolant-conveying region in the crankcase is provided for cooling at least one cylinder of the internal combustion engine, characterised in that the pump casing (2') and the thermostat valve casing (3') are integral with one another and made of the same material and the coolant duct (4) is disposed geodetically substantially below the coolant-conveying region.
  2. A coolant circuit according to claim 1,
    characterised in that the coolant pump (2) is mechanically and/or electrically or hydraulically drivable.
  3. A coolant circuit according to any of claim 1 or claim 3,
    characterised in that the coolant is conveyed radially outward by the wheel (2").
  4. A coolant circuit according to any of claims 1 to 3,
    characterised in that a bearing for the wheel (2") is provided in the pump casing (2').
EP20070005564 2006-04-27 2007-03-19 Coolant loop for a combustion engine Active EP1849973B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610019579 DE102006019579A1 (en) 2006-04-27 2006-04-27 Coolant circuit for an internal combustion engine

Publications (2)

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EP1849973A1 EP1849973A1 (en) 2007-10-31
EP1849973B1 true EP1849973B1 (en) 2008-08-06

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EP20070005564 Active EP1849973B1 (en) 2006-04-27 2007-03-19 Coolant loop for a combustion engine

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Country Link
EP (1) EP1849973B1 (en)
DE (2) DE102006019579A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217166B (en) * 2016-04-08 2023-04-14 洋马动力科技有限公司 Engine device
JP2017187010A (en) * 2016-04-08 2017-10-12 ヤンマー株式会社 Engine device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53146045A (en) * 1977-05-24 1978-12-19 Toyota Motor Corp Cooler for internal combustion engine
JPS58107840A (en) * 1981-12-22 1983-06-27 Nissan Motor Co Ltd Cooling device of v-type internal-combustion engine
JP2505566Y2 (en) * 1987-11-26 1996-07-31 日産自動車株式会社 Water pump device
US5022354A (en) * 1989-09-23 1991-06-11 Mazda Motor Corporation Cooling system for V-type engine
JP2781665B2 (en) * 1994-07-26 1998-07-30 大宇自動車株式会社 Internal combustion engine cooling system
AT2537U1 (en) * 1997-11-06 1998-12-28 Unitech Ag COOLING SYSTEM FOR MOTOR VEHICLES
JP2001115836A (en) * 1999-10-19 2001-04-24 Mazda Motor Corp Main unit structure for water-cooled engine
US6453868B1 (en) * 2000-12-15 2002-09-24 Deere & Company Engine timing gear cover with integral coolant flow passages
DE10117090B4 (en) * 2001-04-06 2013-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Water-cooled, multi-cylinder internal combustion engine
DE102004062526B4 (en) * 2003-12-26 2015-12-31 Mitsubishi Jidosha Kogyo K.K. Chain box construction with integrated water pump

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Publication number Publication date
DE502007000063D1 (en) 2008-09-18
EP1849973A1 (en) 2007-10-31
DE102006019579A1 (en) 2007-10-31

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