EP1046798A2 - Cooling system for an internal combustion engine - Google Patents
Cooling system for an internal combustion engine Download PDFInfo
- Publication number
- EP1046798A2 EP1046798A2 EP00890119A EP00890119A EP1046798A2 EP 1046798 A2 EP1046798 A2 EP 1046798A2 EP 00890119 A EP00890119 A EP 00890119A EP 00890119 A EP00890119 A EP 00890119A EP 1046798 A2 EP1046798 A2 EP 1046798A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- coolant pump
- cooling system
- driven
- 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.)
- Granted
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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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
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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
- F01P2005/125—Driving auxiliary pumps electrically
Definitions
- the present invention relates to a cooling system for an internal combustion engine Combustion with an electrically driven coolant pump to deliver a coolant through the internal combustion engine and through a cooler to remove the heat, wherein a safety device is provided which has an emergency detection device and a Has emergency actuation device, wherein the emergency detection device is designed for this purpose is to detect a malfunction in the area of the electrically driven coolant pump.
- the coolant pump for internal combustion engines is usually via a drive belt driven directly by the internal combustion engine.
- the speed the coolant pump is proportional to the speed of the internal combustion engine.
- the radial pumps used increase the delivery rate and thus also the required Drive power with the speed disproportionately.
- the low speed range is critical.
- a conventional Coolant pump that is correctly designed for the low speed range the delivery rate in the high speed range is much larger than would be necessary.
- the power required to drive the coolant pump is therefore high to a large extent classified as real power loss.
- An electrically driven coolant pump the speed of which is naturally independent of The speed of the internal combustion engine is the advantage for every operating state Internal combustion engine to be able to set the minimum required delivery rate. In this way, the energy requirement for the coolant pump can be significantly reduced, which is particularly true in the area of high speeds, low loads and cold Engine noticeable.
- DE 41 16 496 A describes a safety device for a rotating one Coolant-cooled internal combustion engine is known.
- This safety device the Failure of an electrical coolant pump is detected and takes place depending on this detection an adjustment of the ignition timing or the amount of fuel injected. Thereby overheating of the internal combustion engine can be avoided.
- a similar solution is shown in JP 57-193 716 A. With such solutions there is only a very low thermal load Internal combustion engines a very limited operation possible. If the failure of the Coolant pump is carried out at a point in time before thermal stress, can still with such solutions, overheating of the internal combustion engine cannot be reliably avoided.
- DE 40 38 695 A is a drive arrangement for an auxiliary unit Internal combustion engine known.
- the starter or the rotor of an electric motor is turned on attached to a rotating part driven by the internal combustion engine, and the auxiliary unit is driven by the other part of the electric motor.
- DE 26 31 121 A relates to a liquid-cooled internal combustion engine, on the one hand a directly driven coolant pump and on the other hand one Auxiliary circulating pump has to correspond to the mass flow of the coolant to be able to adapt to specific requirements.
- the problem of failure is one normally only an internal combustion engine powered by an electrically driven coolant pump not addressed.
- the object of the present invention is to provide a cooling system in which, on the one hand, the To take advantage of an electrically driven coolant pump and on the other hand the need after the greatest possible security of the operation of the internal combustion engine To take into account.
- the operation of the electrically driven coolant pump is monitored. If a malfunction is detected, a mechanical connection is made the coolant pump is manufactured with the internal combustion engine to run an emergency operation guarantee. Depending on the available space, it can be the drive belt to drive the alternator, the compressor of the air conditioning system or the like act. It is particularly favorable if the emergency actuation device establishes a connection the coolant pump with a drive belt that is produced by the internal combustion engine is driven.
- the electrical driven coolant pump has an external rotor type motor which a stator is surrounded by a rotor on its outer circumference. In this case the outer peripheral surface of the rotor as an engagement surface for that of the internal combustion engine driven component can be used.
- the Emergency actuation device has a friction wheel which is rotating with a spring force Part of the coolant pump and component driven by the internal combustion engine Intervention can be brought.
- a friction wheel can transmit drive power be sufficient for emergency operation of the coolant pump. Because of the lifespan There are only minimal requirements for the friction wheel when selecting of the corresponding materials great degrees of freedom.
- the electrical driven coolant pump is movably supported and by the emergency actuator can be brought into a position in which an engagement with one of the internal combustion engine driven component exists.
- a rotatable component of the Coolant pump can be directly engaged with a drive belt or the like, which simplifies the construction.
- the emergency operating device has a magnetic coupling, through which a direct drive the coolant pump can be produced by the internal combustion engine. Doing so the coolant pump coaxially with another driven by the internal combustion engine Unit or component arranged, such as the alternator, the oil pump or the pulley for driving a camshaft.
- the emergency detection device has a temperature sensor which detects the temperature of the internal combustion engine and / or the coolant. It it is assumed that an inadmissible increase in the coolant temperature or the temperature of the internal combustion engine due to a fault in the coolant pump is caused. Alternatively or additionally, it can be provided that the emergency detection device has a sensor for detecting the speed of the coolant pump. In this way it can be prevented that in extreme operating states of the internal combustion engine emergency operation is triggered when the coolant pump is functioning properly becomes.
- the emergency operating device is designed such that a mechanical connection of the coolant pump, once established with a component driven by the internal combustion engine only in the workshop is solvable, and that a warning indicator is provided to the state of the emergency actuation device display. This prevents the emergency system from having a is used for a long time in operation and is ultimately overused.
- the present invention relates to an internal combustion engine with the one described above Cooling system is equipped.
- FIG. 1 shows an internal combustion engine 1 with a drive belt on the end face thereof 2 is arranged.
- the drive belt 2 wraps around pulleys 3, 4 and 5, the first pulley 3 connected to the crankshaft, not shown, of the internal combustion engine 1 is, while the other pulleys 4 and 5 with also not shown
- Auxiliary units are connected, which are driven by the internal combustion engine 1. At These auxiliary units can be, for example, the alternator, a compressor act for an air conditioner or the like.
- a belt tensioner 6 ensures the corresponding Tension of the drive belt 2.
- an electrically driven coolant pump 7 is arranged, which as a radial centrifugal pump directly flanged electric motor is formed.
- a drive pulley 8 is provided which is connected directly to the pump, but at a distance from the drive belt 2.
- An emergency actuation device 9 is designed in the form of a friction wheel 10, which is operated by a Spring 11 pressed into the space between the drive pulley 8 and the drive belt 2 becomes. In normal operation, however, the friction wheel 10 is held in place by a holding clip 12 retracted position, in which there is neither the drive belt 2 nor the drive pulley 8 touches.
- An emergency detection device 13 is connected to a temperature sensor 14 which detects the Temperature of the internal combustion engine 1 detected. Furthermore, the emergency detection facility 13 with a speed sensor 15 for determining the speed of the coolant pump 7 connected. If an impermissibly high temperature of the internal combustion engine 1 or a If the coolant pump 7 is detected at a standstill, the emergency detection device 13 is released the bracket 12 out, so that the friction wheel 10 is a non-positive connection between the Drive belt 2 and the drive pulley 8 produces. In this way, the Coolant pump 7 can also be driven mechanically by the drive belt 2.
- the embodiment variant of FIG. 2 differs from the embodiment variant of Fig. 1 mainly in that the coolant pump 7 as a whole pivotable about an axis 16 is arranged.
- a spring 17 presses the entire coolant pump 7 against the drive belt 2, but a holding device (not shown in FIG. 2) is provided, which keeps the coolant pump 7 away from the drive belt 2 in normal operation. Only at; only when In the event of an emergency, the mechanical intervention is established.
- the coolant pump 7 is a coolant pump 7 of the type which is particularly suitable for the invention External rotor shown in a longitudinal section.
- the coolant pump 7 consists of a drive shaft 20, on which a pump impeller 21 is attached.
- the coolant is over a Intake manifold 22 sucked, and by the rotation of the impeller 21 into a pressure pipe 23 pushed out.
- the drive shaft 20 is on a fixed sleeve 26 via roller bearings 24, 25 stored, a mechanical seal 27 for sealing against the cooling medium.
- On the Sleeve 26 is attached to a stator 28 which is composed of electromagnetic windings is.
- the rotor of the electric motor thus formed is designated 29 and exists from an essentially pot-shaped component 30, on the inner circumferential surface of which permanent magnets are used 31 are attached.
- the rotor 29 is fixed to the drive shaft 20.
- the free outer surfaces 33 of the component 30 represent the engagement surface for the friction wheel 10 in the embodiment of FIG. 1 or the drive belt 2 the embodiment of Fig. 2.
- the present invention enables the advantages of an electrically driven coolant pump, which consist in reduced energy consumption, with the reliability of a conventionally powered coolant pump.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Kühlsystem für eine Brennkraftmaschine mit innerer Verbrennung mit einer elektrisch angetriebenen Kühlmittelpumpe zur Förderung eines Kühlmittels durch die Brennkraftmaschine und durch einen Kühler zur Abfuhr der Wärme, wobei eine Sicherheitseinrichtung vorgesehen ist, die eine Notfallerkennungseinrichtung und eine Notfallbetätigungseinrichtung aufweist, wobei die Notfallerkennungseinrichtung dazu ausgebildet ist, einen Störfall im Bereich der elektrisch angetriebenen Kühlmittelpumpe zu erfassen.The present invention relates to a cooling system for an internal combustion engine Combustion with an electrically driven coolant pump to deliver a coolant through the internal combustion engine and through a cooler to remove the heat, wherein a safety device is provided which has an emergency detection device and a Has emergency actuation device, wherein the emergency detection device is designed for this purpose is to detect a malfunction in the area of the electrically driven coolant pump.
Üblicherweise werden die Kühlmittelpumpe für Brennkraftmaschinen über einen Antriebsriemen direkt von der Brennkraftmaschine angetrieben. Dies hat zur Folge, dass die Drehzahl der Kühlmittelpumpe proportional zur Drehzahl der Brennkraftmaschine ist. Bei den üblicherweise eingesetzten Radialpumpen steigt die Fördermenge und damit auch die benötigte Antriebsleistung mit der Drehzahl überproportional an. Bei der Auslegung der Kühlmittelpumpe ist der Bereich niedriger Drehzahlen kritisch. Dies hat zur Folge, dass bei einer herkömmlichen Kühlmittelpumpe, die für den Bereich niedriger Drehzahlen korrekt ausgelegt ist, die Fördermenge im Bereich hoher Drehzahlen wesentlich größer ist als dies notwendig wäre. Daher ist die für den Antrieb der Kühlmittelpumpe erforderliche Leistung im hohen Bereich zu einem Großteil als echte Verlustleistung einzustufen.The coolant pump for internal combustion engines is usually via a drive belt driven directly by the internal combustion engine. As a result, the speed the coolant pump is proportional to the speed of the internal combustion engine. In the usual The radial pumps used increase the delivery rate and thus also the required Drive power with the speed disproportionately. When designing the coolant pump the low speed range is critical. As a result, a conventional Coolant pump that is correctly designed for the low speed range, the delivery rate in the high speed range is much larger than would be necessary. The power required to drive the coolant pump is therefore high to a large extent classified as real power loss.
Eine elektrisch angetriebene Kühlmittelpumpe, deren Drehzahl naturgemäß unabhängig von der Drehzahl der Brennkraftmaschine ist, bietet den Vorteil, für jeden Betriebszustand der Brennkraftmaschine die jeweils minimal erforderliche Förderleistung einstellen zu können. Auf diese Weise kann der Energiebedarf für die Kühlmittelpumpe wesentlich abgesenkt werden, was sich insbesonders in dem Bereich hoher Drehzahlen, geringer Last und bei kaltem Motor bemerkbar macht. Eine weite Verbreitung elektrisch betriebener Kühlmittelpumpen für Brennkraftmaschinen wurde bisher jedoch durch den Umstand behindert, dass es sich bei einer Kühlmittelpumpe um einen äußerst kritischen Bauteil handelt. Bei Ausfall der Kühlmittelpumpe muss der Betrieb der Brennkraftmaschine kurzfristig beendet werden, um eine Zerstörung durch Überhitzung zu vermeiden.An electrically driven coolant pump, the speed of which is naturally independent of The speed of the internal combustion engine is the advantage for every operating state Internal combustion engine to be able to set the minimum required delivery rate. In this way, the energy requirement for the coolant pump can be significantly reduced, which is particularly true in the area of high speeds, low loads and cold Engine noticeable. A wide spread of electrically operated coolant pumps for So far, however, internal combustion engines have been hampered by the fact that one Coolant pump is an extremely critical component. If the coolant pump fails the operation of the internal combustion engine must be stopped for a short time Avoid destruction through overheating.
Aus der DE 41 16 496 A ist eine Sicherheitsvorrichtung für eine durch ein umlaufendes Kühlmittel gekühlte Brennkraftmaschine bekannt. Bei dieser Sicherheitsvorrichtung wird der Ausfall einer elektrischen Kühlmittelpumpe erfasst und in Abhängigkeit dieser Erfassung erfolgt eine Verstellung des Zündzeitpunktes oder der eingespritzten Kraftstoffmenge. Dadurch kann eine Überhitzung der Brennkraftmaschine vermieden werden. Eine ähnliche Lösung ist in der JP 57-193 716 A gezeigt. Mit solchen Lösungen ist nur bei thermisch sehr gering belasteten Brennkraftmaschinen ein sehr beschränkter Betrieb möglich. Wenn der Ausfall der Kühlmittelpumpe zu einem Zeitpunkt vor thermischer Belastung erfolgt, kann dennoch mit solchen Lösungen eine Überhitzung der Brennkraftmaschine nicht sicher vermieden werden. DE 41 16 496 A describes a safety device for a rotating one Coolant-cooled internal combustion engine is known. With this safety device the Failure of an electrical coolant pump is detected and takes place depending on this detection an adjustment of the ignition timing or the amount of fuel injected. Thereby overheating of the internal combustion engine can be avoided. A similar solution is shown in JP 57-193 716 A. With such solutions there is only a very low thermal load Internal combustion engines a very limited operation possible. If the failure of the Coolant pump is carried out at a point in time before thermal stress, can still with such solutions, overheating of the internal combustion engine cannot be reliably avoided.
Weiters ist aus der DE 40 38 695 A eine Antriebsanordnung für ein Hilfsaggregat einer Brennkraftmaschine bekannt. Dabei wird der Starter oder der Rotor eines Elektromotors an einem von der Brennkraftmaschine angetriebenen Drehteil befestigt, und das Hilfsaggregat wird vom anderen Teil des Elektromotors angetrieben. Auf diese Weise ist es möglich, einen Lüfter oder dergleichen mit relativ geringem Energieaufwand anzutreiben und dennoch in seiner Leistung zu regeln. Die Problematik des Ausfalls einer elektrischen Kühlmittelpumpe ist dabei nicht angesprochen. Die DE 26 31 121 A betrifft eine flüssigkeitsgekühlte Brennkraftmaschine, die einerseits eine direkt angetriebene Kühlmittelpumpe und andererseits eine Zusatzumwälzpumpe aufweist, um den Mengendurchfluss des Kühlmittels entsprechend den jeweiligen Erfordernissen anpassen zu können. Auch hier ist das Problem des Ausfalls einer im Normalfall nur von einer elektrisch angetriebenen Kühlmittelpumpe versorgten Brennkraftmaschine nicht angesprochen.Furthermore, from DE 40 38 695 A is a drive arrangement for an auxiliary unit Internal combustion engine known. The starter or the rotor of an electric motor is turned on attached to a rotating part driven by the internal combustion engine, and the auxiliary unit is driven by the other part of the electric motor. This way it is possible to get one To drive fans or the like with relatively little energy and yet in regulate his performance. The problem of the failure of an electric coolant pump is not addressed. DE 26 31 121 A relates to a liquid-cooled internal combustion engine, on the one hand a directly driven coolant pump and on the other hand one Auxiliary circulating pump has to correspond to the mass flow of the coolant to be able to adapt to specific requirements. Again, the problem of failure is one normally only an internal combustion engine powered by an electrically driven coolant pump not addressed.
Aufgabe der vorliegenden Erfindung ist es, ein Kühlsystem zu schaffen, bei dem einerseits die Vorteile einer elektrisch angetriebenen Kühlmittelpumpe zu nutzen und andererseits dem Bedürfnis nach einer möglichst umfassenden Sicherheit des Betriebs der Brennkraftmaschine Rechnung zu tragen.The object of the present invention is to provide a cooling system in which, on the one hand, the To take advantage of an electrically driven coolant pump and on the other hand the need after the greatest possible security of the operation of the internal combustion engine To take into account.
Diese Aufgaben werden dadurch gelöst, dass die Notfallbetätigungseinrichtung dazu ausgebildet ist, bei Vorliegen eines Störfalls im Bereich der Kühlmittelpumpe eine mechanische Verbindung der Kühlmittelpumpe mit einem von der Brennkraftmaschine angetriebenen Bauteil zu bewirken.These tasks are solved in that the emergency actuation device is trained for this is a mechanical if there is a malfunction in the area of the coolant pump Connection of the coolant pump to a component driven by the internal combustion engine to effect.
Wesentlich an der Erfindung ist, dass der Betrieb der elektrisch angetriebenen Kühlmittelpumpe überwacht wird. Wenn eine Störung erkannt wird, wird eine mechanische Verbindung der Kühlmittelpumpe mit der Brennkraftmaschine hergestellt, um einen Notlaufbetrieb zu gewährleisten. Je nach den verfügbaren Platzverhältnissen kann es sich dabei um den Antriebsriemen zum Antrieb der Lichtmaschine, des Kompressors der Klimaanlage oder dergleichen handeln. Besonders günstig ist es, wenn die Notfallbetätigungseinrichtung eine Verbindung der Kühlmittelpumpe mit einem Antriebsriemen herstellt, der von der Brennkraftmaschine angetrieben wird. Eine besonders einfache Ausbildung ergibt sich dabei, wenn die elektrisch angetriebene Kühlmittelpumpe einen Motor vom Typ des Außenläufers aufweist, bei dem ein Stator an seinem äußeren Umfang von einem Rotor umgeben ist. In diesem Fall kann die äußere Umfangsfläche des Rotors als Eingriffsfläche für den von der Brennkraftmaschine angetriebenen Bauteil verwendet werden.It is essential to the invention that the operation of the electrically driven coolant pump is monitored. If a malfunction is detected, a mechanical connection is made the coolant pump is manufactured with the internal combustion engine to run an emergency operation guarantee. Depending on the available space, it can be the drive belt to drive the alternator, the compressor of the air conditioning system or the like act. It is particularly favorable if the emergency actuation device establishes a connection the coolant pump with a drive belt that is produced by the internal combustion engine is driven. A particularly simple training results when the electrical driven coolant pump has an external rotor type motor which a stator is surrounded by a rotor on its outer circumference. In this case the outer peripheral surface of the rotor as an engagement surface for that of the internal combustion engine driven component can be used.
In einer besonders begünstigten Ausführungsvariante der Erfindung ist vorgesehen, dass die Notfallbetätigungseinrichtung ein Reibrad aufweist, das durch Federkraft mit einem sich drehenden Teil der Kühlmittelpumpe und von der Brennkraftmaschine angetriebenen Bauteil in Eingriff gebracht werden kann. Durch ein solches Reibrad kann eine Antriebsleistung übertragen werden, die für einen Notlaufbetrieb der Kühlmittelpumpe ausreicht. Da an die Lebensdauer des Reibrades nur minimale Anforderungen zu stellen sind, bestehen bei der Auswahl der entsprechenden Werkstoffe große Freiheitsgrade. In a particularly advantageous embodiment variant of the invention it is provided that the Emergency actuation device has a friction wheel which is rotating with a spring force Part of the coolant pump and component driven by the internal combustion engine Intervention can be brought. Such a friction wheel can transmit drive power be sufficient for emergency operation of the coolant pump. Because of the lifespan There are only minimal requirements for the friction wheel when selecting of the corresponding materials great degrees of freedom.
In einer alternativen Ausführungsvariante der Erfindung ist vorgesehen, dass die elektrisch angetriebene Kühlmittelpumpe beweglich gelagert ist und von der Notfallbetätigungseinrichtung in eine Stellung gebracht werden kann, in der ein Eingriff mit einem von der Brennkraftmaschine angetriebenen Bauteil besteht. Auf diese Weise kann ein drehbarer Bauteil der Kühlmittelpumpe direkt mit einem Antriebsriemen oder dergleichen in Eingriff gebracht werden, was den Aufbau vereinfacht.In an alternative embodiment of the invention it is provided that the electrical driven coolant pump is movably supported and by the emergency actuator can be brought into a position in which an engagement with one of the internal combustion engine driven component exists. In this way, a rotatable component of the Coolant pump can be directly engaged with a drive belt or the like, which simplifies the construction.
In einer weiteren alternativen Ausführungsvariante der Erfindung kann vorgesehen sein, dass die Notfallbetätigungseinrichtung eine Magnetkupplung aufweist, durch die ein direkter Antrieb der Kühlmittelpumpe durch die Brennkraftmaschine hergestellt werden kann. Dabei wird die Kühlmittelpumpe koaxial mit einem anderen von der Brennkraftmaschine angetriebenen Aggregat oder Bauteil angeordnet, wie beispielsweise der Lichtmaschine, der Ölpumpe oder der Riemenscheibe für den Antrieb einer Nockenwelle.In a further alternative embodiment variant of the invention it can be provided that the emergency operating device has a magnetic coupling, through which a direct drive the coolant pump can be produced by the internal combustion engine. Doing so the coolant pump coaxially with another driven by the internal combustion engine Unit or component arranged, such as the alternator, the oil pump or the pulley for driving a camshaft.
Besonders günstig ist es, wenn die Notfallerkennungseinrichtung einen Temperatursensor aufweist, der die Temperatur der Brennkraftmaschine und/oder des Kühlmittels erfasst. Es wird dabei davon ausgegangen, dass ein unzulässiger Anstieg der Kühlmitteltemperatur oder der Temperatur der Brennkraftmaschine durch eine Störung im Bereich der Kühlmittelpumpe verursacht ist. Alternativ oder zusätzlich dazu kann vorgesehen sein, dass die Notfallerkennungseinrichtung einen Sensor zur Erfassung der Drehzahl der Kühlmittelpumpe aufweist. Auf diese Weise kann verhindert werden, dass in extremen Betriebszuständen der Brennkraftmaschine bei an sich funktionstüchtiger Kühlmittelpumpe der Notlaufbetrieb ausgelöst wird.It is particularly favorable if the emergency detection device has a temperature sensor which detects the temperature of the internal combustion engine and / or the coolant. It it is assumed that an inadmissible increase in the coolant temperature or the temperature of the internal combustion engine due to a fault in the coolant pump is caused. Alternatively or additionally, it can be provided that the emergency detection device has a sensor for detecting the speed of the coolant pump. In this way it can be prevented that in extreme operating states of the internal combustion engine emergency operation is triggered when the coolant pump is functioning properly becomes.
Um die Betriebssicherheit eines Kraftfahrzeugs, das mit einem erfindungsgemäßen Kühlsystem ausgerüstet ist, zu erhöhen, kann weiters vorgesehen sein, dass die Notfallbetätigungseinrichtung so ausgebildet ist, dass eine einmal hergestellte mechanische Verbindung der Kühlmittelpumpe mit einem von der Brennkraftmaschine angetriebenen Bauteil nur werkstattmäßig lösbar ist, und dass eine Warnanzeige vorgesehen ist, um den Zustand der Notfallbetätigungseinrichtung anzuzeigen. Auf diese Weise wird verhindert, dass das Notsystem über eine längere Zeit betriebsmäßig verwendet wird und letztlich überbeansprucht wird.To ensure the operational safety of a motor vehicle with a cooling system according to the invention is equipped to increase, it can further be provided that the emergency operating device is designed such that a mechanical connection of the coolant pump, once established with a component driven by the internal combustion engine only in the workshop is solvable, and that a warning indicator is provided to the state of the emergency actuation device display. This prevents the emergency system from having a is used for a long time in operation and is ultimately overused.
Weiters betrifft die vorliegende Erfindung eine Brennkraftmaschine, die mit dem oben beschriebenen Kühlsystem ausgestattet ist.Furthermore, the present invention relates to an internal combustion engine with the one described above Cooling system is equipped.
In der Folge wird die vorliegende Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Die Figuren zeigen:
- Fig. 1
- eine erste Ausführungsvariante einer Brennkraftmaschine mit einem erfindungsgemäßen Kühlsystem in einer schematischen Draufsicht,
- Fig. 2
- eine weitere Ausführungsvariante der Erfindung in einer Darstellung entsprechend der Fig. 1, und
- Fig. 3
- eine elektrisch betriebene Kühlmittelpumpe mit einem Außenläufer.
- Fig. 1
- a first embodiment of an internal combustion engine with a cooling system according to the invention in a schematic plan view,
- Fig. 2
- a further embodiment of the invention in a representation corresponding to FIG. 1, and
- Fig. 3
- an electrically operated coolant pump with an external rotor.
In der Fig. 1 ist eine Brennkraftmaschine 1 dargestellt, an deren Stirnseite ein Antriebsriemen
2 angeordnet ist. Der Antriebsriemen 2 umschlingt Riemenscheiben 3, 4 und 5, wobei die
erste Riemenscheibe 3 mit der nicht dargestellten Kurbelwelle der Brennkraftmaschine 1 verbunden
ist, während die weiteren Riemenscheiben 4 und 5 mit ebenfalls nicht dargestellten
Hilfsaggregaten verbunden sind, die von der Brennkraftmaschine 1 angetrieben werden. Bei
diesen Hilfsaggregaten kann es sich beispielsweise um die Lichtmaschine, einen Kompressor
für eine Klimaanlage oder dergleichen handeln. Ein Riemenspanner 6 sorgt für die entsprechende
Spannung des Antriebsriemens 2. Ebenfalls im Bereich der Brennkraftmaschine 1 ist
eine elektrisch angetriebene Kühlmittelpumpe 7 angeordnet, die als Radialkreiselpumpe mit
direkt angeflanschtem Elektromotor ausgebildet ist. In der Ebene des Antriebsriemens 2 ist
eine Antriebsscheibe 8 vorgesehen, die direkt mit der Pumpe verbunden ist, jedoch einen Abstand
vom Antriebsriemen 2 aufweist.1 shows an
Eine Notfallbetätigungseinrichtung 9 ist in Form eines Reibrades 10 ausgebildet, das von einer
Feder 11 in den Raum zwischen der Antriebsscheibe 8 und dem Antriebsriemen 2 gedrückt
wird. Im Normalbetrieb wird jedoch das Reibrad 10 von einer Halteklammer 12 in einer
zurückgezogenen Stellung gehalten, in der es weder den Antriebsriemen 2 noch die Antriebsscheibe
8 berührt.An emergency actuation device 9 is designed in the form of a
Eine Notfallerkennungseinrichtung 13 ist mit einem Temperatursensor 14 verbunden, der die
Temperatur der Brennkraftmaschine 1 erfasst. Weiters ist die Notfallerkennungseinrichtung
13 mit einem Drehzahlsensor 15 zur Bestimmung der Drehzahl der Kühlmittelpumpe 7
verbunden. Wenn eine unzulässig hohe Temperatur der Brennkraftmaschine 1 oder ein
Stillstand der Kühlmittelpumpe 7 erkannt wird, dann löst die Notfallerkennungseinrichtung 13
die Klammer 12 aus, so dass das Reibrad 10 eine kraftschlüssige Verbindung zwischen dem
Antriebsriemen 2 und der Antriebsscheibe 8 herstellt. Auf diese Weise kann die
Kühlmittelpumpe 7 auch mechanisch durch den Antriebsriemen 2 angetrieben werden.An
Die Ausführungsvariante der Fig. 2 unterscheidet sich von der Ausführungsvariante von
Fig. 1 vor allem dadurch, dass die Kühlmittelpumpe 7 als ganzes um eine Achse 16 schwenkbar
angeordnet ist. Eine Feder 17 drückt die gesamte Kühlmittelpumpe 7 gegen den Antriebsriemen
2, wobei jedoch eine in der Fig. 2 nicht dargestellte Halteeinrichtung vorgesehen ist,
die im Nonnalbetrieb die Kühlmittelpumpe 7 vom Antriebsriemen 2 entfernt hält. Erst bei
Eintreten eines Notfalls wird der mechanische Eingriff hergestellt.The embodiment variant of FIG. 2 differs from the embodiment variant of
Fig. 1 mainly in that the
In der Fig. 3 ist eine für die Erfindung besonders geeignete Kühlmittelpumpe 7 vom Typ des
Außenläufers in einem Längsschnitt dargestellt. Die Kühlmittelpumpe 7 besteht aus einer Antriebswelle
20, auf der ein Pumpenlaufrad 21 befestigt ist. Das Kühlmittel wird über einen
Ansaugstutzen 22 angesaugt, und durch die Drehung des Laufrades 21 in ein Druckrohr 23
ausgestoßen. Die Antriebswelle 20 ist über Wälzlager 24, 25 an einer feststehenden Hülse 26
gelagert, eine Gleitringdichtung 27 zur Abdichtung gegenüber dem Kühlmedium. Auf der
Hülse 26 ist ein Stator 28 befestigt, der aus elektromagnetischen Wicklungen zusammengesetzt
ist. Der Rotor des dadurch gebildeten Elektromotors ist mit 29 bezeichnet, und besteht
aus einem im wesentlichen topfförmigen Bauteil 30, an dessen innerer Umfangsfläche Permanentmagnete
31 befestigt sind. Der Rotor 29 ist fest mit der Antriebswelle 20 verbunden. Um
die sich drehende Außenfläche des Bauteils 30 nach außen abzusichern, sind an kritischen
Stellen Stäbe angebracht. Die freien Außenflächen 33 des Bauteils 30 stellen die Eingriffsfläche
für das Reibrad 10 bei der Ausführungsvariante von Fig. 1 bzw. den Antriebsriemen 2 bei
der Ausführungsvariante von Fig. 2 dar.3 is a
Die vorliegende Erfindung ermöglicht es, die Vorteile einer elektrisch angetriebenen Kühlmittelpumpe, die in einem verminderten Energieverbrauch bestehen, mit der Zuverlässigkeit einer konventionell angetriebenen Kühlmittelpumpe zu verbinden.The present invention enables the advantages of an electrically driven coolant pump, which consist in reduced energy consumption, with the reliability of a conventionally powered coolant pump.
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04011758A EP1447540B1 (en) | 1999-04-22 | 2000-04-13 | Cooling system for an internal combustion engine |
| AT00890119T ATE310899T1 (en) | 1999-04-22 | 2000-04-13 | COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT71499 | 1999-04-22 | ||
| AT71499 | 1999-04-22 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04011758.2 Division-Into | 2004-05-18 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1046798A2 true EP1046798A2 (en) | 2000-10-25 |
| EP1046798A3 EP1046798A3 (en) | 2001-12-12 |
| EP1046798B1 EP1046798B1 (en) | 2005-11-23 |
Family
ID=3497877
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00890119A Expired - Lifetime EP1046798B1 (en) | 1999-04-22 | 2000-04-13 | Cooling system for an internal combustion engine |
| EP04011758A Expired - Lifetime EP1447540B1 (en) | 1999-04-22 | 2000-04-13 | Cooling system for an internal combustion engine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04011758A Expired - Lifetime EP1447540B1 (en) | 1999-04-22 | 2000-04-13 | Cooling system for an internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6318307B1 (en) |
| EP (2) | EP1046798B1 (en) |
| AT (2) | ATE310899T1 (en) |
| DE (2) | DE50010786D1 (en) |
| ES (1) | ES2242949T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1529936A1 (en) * | 2003-11-03 | 2005-05-11 | Bayerische Motoren Werke Aktiengesellschaft | Cooling system for an internal combustion engine of a vehicle with a disconnectable water pump |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1239129B1 (en) | 2001-03-06 | 2007-10-31 | Calsonic Kansei Corporation | Cooling system for water-cooled internal combustion engine and control method applicable to cooling system therefor |
| US7141588B2 (en) * | 2002-02-25 | 2006-11-28 | Pfizer, Inc. | N-aryl-2-oxazolidinone-5-carboxamides and their derivatives |
| EP2184494A3 (en) * | 2008-11-05 | 2016-09-21 | Magna Powertrain Inc. | On-demand on-off water pump assembly |
| JP6235394B2 (en) * | 2014-03-28 | 2017-11-22 | 本田技研工業株式会社 | Turbocharged engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2631121A1 (en) | 1976-07-10 | 1978-01-12 | Daimler Benz Ag | Liq. cooled IC engine coolant cycle - has additional pump for matching circulation to heat release |
| JPS57193716A (en) | 1981-05-22 | 1982-11-29 | Mazda Motor Corp | Cooler for engine |
| DE4116496A1 (en) | 1990-05-30 | 1991-12-05 | Volkswagen Ag | Coolant circulation safety device for internal combustion engine - prevents overload or overrun by action on fuel injection or ignition timing after failure of pump |
| DE4038695A1 (en) | 1990-12-05 | 1992-06-11 | Bayerische Motoren Werke Ag | Variable-speed electric drive for IC engine auxiliaries - introduces difference in rotational speed by motor stator secured to rotary portion of engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57193713A (en) * | 1981-05-22 | 1982-11-29 | Mazda Motor Corp | Controller for water pump of engine |
| DE19538633A1 (en) * | 1995-10-17 | 1997-04-24 | Schwaebische Huettenwerke Gmbh | Pump unit |
-
2000
- 2000-04-13 AT AT00890119T patent/ATE310899T1/en not_active IP Right Cessation
- 2000-04-13 AT AT04011758T patent/ATE299990T1/en not_active IP Right Cessation
- 2000-04-13 EP EP00890119A patent/EP1046798B1/en not_active Expired - Lifetime
- 2000-04-13 DE DE50010786T patent/DE50010786D1/en not_active Expired - Lifetime
- 2000-04-13 ES ES04011758T patent/ES2242949T3/en not_active Expired - Lifetime
- 2000-04-13 EP EP04011758A patent/EP1447540B1/en not_active Expired - Lifetime
- 2000-04-13 DE DE50011670T patent/DE50011670D1/en not_active Expired - Lifetime
- 2000-04-19 US US09/552,580 patent/US6318307B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2631121A1 (en) | 1976-07-10 | 1978-01-12 | Daimler Benz Ag | Liq. cooled IC engine coolant cycle - has additional pump for matching circulation to heat release |
| JPS57193716A (en) | 1981-05-22 | 1982-11-29 | Mazda Motor Corp | Cooler for engine |
| DE4116496A1 (en) | 1990-05-30 | 1991-12-05 | Volkswagen Ag | Coolant circulation safety device for internal combustion engine - prevents overload or overrun by action on fuel injection or ignition timing after failure of pump |
| DE4038695A1 (en) | 1990-12-05 | 1992-06-11 | Bayerische Motoren Werke Ag | Variable-speed electric drive for IC engine auxiliaries - introduces difference in rotational speed by motor stator secured to rotary portion of engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1529936A1 (en) * | 2003-11-03 | 2005-05-11 | Bayerische Motoren Werke Aktiengesellschaft | Cooling system for an internal combustion engine of a vehicle with a disconnectable water pump |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1046798A3 (en) | 2001-12-12 |
| ES2242949T3 (en) | 2005-11-16 |
| DE50011670D1 (en) | 2005-12-29 |
| US6318307B1 (en) | 2001-11-20 |
| EP1046798B1 (en) | 2005-11-23 |
| ATE299990T1 (en) | 2005-08-15 |
| EP1447540B1 (en) | 2005-07-20 |
| EP1447540A1 (en) | 2004-08-18 |
| ATE310899T1 (en) | 2005-12-15 |
| DE50010786D1 (en) | 2005-08-25 |
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