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WO2010020545A1 - Method for preventing the coolant for at least one electric motor of a hybrid drive train from boiling - Google Patents

Method for preventing the coolant for at least one electric motor of a hybrid drive train from boiling Download PDF

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Publication number
WO2010020545A1
WO2010020545A1 PCT/EP2009/060280 EP2009060280W WO2010020545A1 WO 2010020545 A1 WO2010020545 A1 WO 2010020545A1 EP 2009060280 W EP2009060280 W EP 2009060280W WO 2010020545 A1 WO2010020545 A1 WO 2010020545A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant
temperature
cooling jacket
cooling
boiling
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.)
Ceased
Application number
PCT/EP2009/060280
Other languages
German (de)
French (fr)
Inventor
Max Bachmann
Bernard Hunold
Kai Borntraeger
Rene Budach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of WO2010020545A1 publication Critical patent/WO2010020545A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2260/00—Operating Modes
    • B60L2260/10—Temporary overload
    • B60L2260/16—Temporary overload of electrical drive trains
    • B60L2260/167—Temporary overload of electrical drive trains of motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/087—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/086—Power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to a method for preventing the boiling of the coolant of the at least one electric machine of a motor vehicle comprising a hybrid drive train according to the preamble of patent claim 1.
  • the combustion engines used in vehicles have a cooling circuit, which includes a radiator with fan and a mechanically driven and usually coupled to the engine coolant pump. Furthermore, automatic transmissions with integrated wear-free brake on a heat exchanger whose fluid side is connected to the cooling circuit of the internal combustion engine.
  • boiling of the coolant in the cooling circuit can lead to cavitation damage to the components of the electric machine through which coolant flows, wherein boiling can be brought about by various effects.
  • boiling of the coolant may be caused by pressure drop in the vehicle's overall cooling system; For example, a pressure drop in the overall cooling system can be caused by the shutdown of the engine. Other causes for reaching the boiling temperature of the coolant are too high coolant inlet temperature and operation of the electrical machine with permanently high performance.
  • the present invention has for its object to provide a method for preventing the boiling of the coolant for cooling the at least one coupled to the cooling circuit of the internal combustion engine of the vehicle electric machine of a hybrid powertrain comprehensive motor vehicle, is avoided by its implementation that reaches the boiling temperature ofmémitteis becomes. This should be avoided by boiling of the coolant caused cavitation damage to the coolant flowed through components.
  • a method for avoiding the boiling of the coolant for cooling the at least one electric machine of a hybrid powertrain comprehensive motor vehicle is proposed in the context of a boiling of the coolant by an embodiment of the driving strategy of the vehicle depending on the stator temperature or the coolant temperature in the cooling jacket or a Temperature is avoided near the cooling jacket and / or in dependence of the coolant flow rate of the cooling circuit.
  • the driving strategy is designed as a function of the stator temperature or the coolant temperature in the cooling jacket or a temperature close to the cooling jacket; Preferably, when exceeding a predetermined temperature in the stator, in the cooling jacket or in the vicinity of the cooling jacket, a reduction in the power of the electric machine is carried out in the pulling and pushing operation; the power reduction is canceled when the temperature in the stator of the electric machine, in the cooling jacket or in the vicinity of the cooling jacket falls below a predetermined threshold.
  • the driving strategy is designed as a function of the available coolant volume flow;
  • a power reduction of the electric machine in the pulling and pushing operation is preferably carried out, which is canceled when the coolant volume flow exceeds a predetermined threshold value.
  • provision may be made for switching off the internal combustion engine when the stator temperature or the coolant temperature in the cooling jacket or a temperature in the vicinity of the cooling jacket exceeds a predetermined threshold value, thereby causing a boiling of the coolant Pressure drop is avoided in the overall cooling system of the vehicle.
  • the internal combustion engine travels for a defined time, so that the pressure in the cooling circuit is maintained and the heat energy of the stator is dissipated by the coolant.
  • the follow-up time of the internal combustion engine is a function of the stator temperature or the Coolant temperature in the cooling jacket or a temperature in the vicinity of the cooling jacket and / or the Nachfil characterizing the electrical machine.
  • the quantities to be monitored can be determined either by sensors and / or by models of the relevant components.
  • the inventive concept a method is provided, which is feasible without significant additional design effort and easily ensures reliable prevention of boiling of the coolant for cooling the at least one electric machine of a hybrid powertrain comprehensive motor vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Disclosed is a method for preventing the coolant for cooling the at least one electric motor of a motor vehicle comprising a hybrid drive train from boiling, said at least one electric motor being coupled to the cooling cycle of the combustion engine of the vehicle. In said method, the driving strategy of the vehicle is designed in accordance with the stator temperature or the coolant temperature in the cooling jacket or a temperature near the cooling jacket and/or in accordance with the coolant volume flow in the cooling cycle in such a way that the boiling temperature of the coolant is not reached.

Description

Verfahren zur Vermeidung des Siedens des Kühlmittels für zumindest eine elektrische Maschine eines Hvbridantriebsstrangs A method for preventing the boiling of the coolant for at least one electric machine of a hybrid powertrain

Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Vermeidung des Siedens des Kühlmittels der zumindest einen elektrischen Maschine eines einen Hybridantriebsstrang umfassenden Kraftfahrzeugs gemäß dem Oberbegriff des Patentanspruchs 1.The present invention relates to a method for preventing the boiling of the coolant of the at least one electric machine of a motor vehicle comprising a hybrid drive train according to the preamble of patent claim 1.

Aus dem Stand der Technik ist bekannt, dass elektrische Maschinen von Hybridantriebssträngen, insbesondere elektrische Maschinen hoher Leistungsdichte mittels eines Fluidkühlkreislaufs des Fahrzeugs gekühlt werden; hierbei sind die elektrischen Maschinen an den Kühlkreislauf des Verbrennungsmotors gekoppelt.It is known from the prior art that electric machines of hybrid powertrains, in particular electric machines of high power density are cooled by means of a fluid cooling circuit of the vehicle; In this case, the electric machines are coupled to the cooling circuit of the internal combustion engine.

Die in Fahrzeugen eingesetzten Verbrennungsmotoren weisen einen Kühlkreislauf auf, welcher einen Radiator mit Lüfter und eine mechanisch angetriebene und in der Regel an den Verbrennungsmotor gekoppelte Kühlmittel- Pumpe umfasst. Des weiteren weisen Automatgetriebe mit integrierter verschleißfreier Bremse einen Wärmetauscher auf, dessen Fluidseite an den Kühlkreislauf des Verbrennungsmotors angeschlossen ist.The combustion engines used in vehicles have a cooling circuit, which includes a radiator with fan and a mechanically driven and usually coupled to the engine coolant pump. Furthermore, automatic transmissions with integrated wear-free brake on a heat exchanger whose fluid side is connected to the cooling circuit of the internal combustion engine.

Hierbei kann ein Sieden des Kühlmittels im Kühlkreislauf zu Kavitationsschäden an den kühlmitteldurchströmten Bauteilen der elektrischen Maschine führen, wobei ein Sieden durch verschiedene Effekte hervorgerufen werden kann.In this case, boiling of the coolant in the cooling circuit can lead to cavitation damage to the components of the electric machine through which coolant flows, wherein boiling can be brought about by various effects.

Beispielsweise kann ein Sieden des Kühlmittels durch Verlustleistung der elektrischen Maschine in rein elektrischem Betrieb oder durch Nachheizen der in der elektrischen Maschine gespeicherten Wärmeenergie bei keinem oder geringem Kühlmittelvolumenstrom durch die elektrische Maschine verursacht werden.For example, a boiling of the coolant due to power loss of the electric machine in purely electrical operation or by reheating the heat energy stored in the electric machine with no or low coolant flow caused by the electric machine.

Des weiteren kann ein Sieden des Kühlmittels durch Druckabfall im Gesamtkühlsystem des Fahrzeugs verursacht werden; beispielsweise kann ein Druckabfall im Gesamtkühlsystem durch das Abstellen des Verbrennungsmotors hervorgerufen werden. Weitere Ursachen für das Erreichen der Siedetemperatur des Kühlmittels sind eine zu hohe Kühlmittelzulauftemperatur sowie ein Betrieb der elektrischen Maschine mit dauerhaft hoher Leistung.Furthermore, boiling of the coolant may be caused by pressure drop in the vehicle's overall cooling system; For example, a pressure drop in the overall cooling system can be caused by the shutdown of the engine. Other causes for reaching the boiling temperature of the coolant are too high coolant inlet temperature and operation of the electrical machine with permanently high performance.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Vermeidung des Siedens des Kühlmittels zur Kühlung der zumindest einen an den Kühlkreislauf des Verbrennungsmotors des Fahrzeugs gekoppelten elektrischen Maschine eines einen Hybridantriebsstrang umfassenden Kraftfahrzeugs anzugeben, durch dessen Durchführung vermieden wird, dass die Siedetemperatur des Kühlmitteis erreicht wird. Dadurch sollen durch Sieden des Kühlmittels verursachte Kavitationsschäden an den kühlmitteldurchströmten Bauteilen vermieden werden.The present invention has for its object to provide a method for preventing the boiling of the coolant for cooling the at least one coupled to the cooling circuit of the internal combustion engine of the vehicle electric machine of a hybrid powertrain comprehensive motor vehicle, is avoided by its implementation that reaches the boiling temperature of Kühlmitteis becomes. This should be avoided by boiling of the coolant caused cavitation damage to the coolant flowed through components.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere erfindungsgemäße Ausgestaltungen und Vorteile gehen aus den Unteransprüchen hervor.This object is solved by the features of patent claim 1. Further embodiments and advantages of the invention will become apparent from the dependent claims.

Demnach wird ein Verfahren zur Vermeidung des Siedens des Kühlmittels zur Kühlung der zumindest einen elektrischen Maschine eines einen Hybridantriebsstrang umfassenden Kraftfahrzeugs vorgeschlagen, im Rahmen dessen ein Sieden des Kühlmittels durch eine Ausgestaltung der Fahrstrategie des Fahrzeugs in Abhängigkeit der Statortemperatur bzw. der Kühlmitteltemperatur im Kühlmantel oder einer Temperatur nahe des Kühlmantels und/oder in Abhängigkeit des Kühlmittelvolumenstroms des Kühlkreislaufs vermieden wird. Gemäß einer ersten Ausgestaltung der Erfindung wird vorgeschlagen, die Fahrstrategie in Abhängigkeit der Statortemperatur bzw. der Kühlmitteltemperatur im Kühlmantel oder einer Temperatur nahe des Kühlmantels zu gestalten; vorzugsweise wird bei Überschreiten einer vorgegebenen Temperatur im Stator, im Kühlmantel oder in der Nähe des Kühlmantels eine Leistungsreduzierung der elektrischen Maschine im Zug- und Schubbetrieb durchgeführt; die Leistungsreduzierung wird aufgehoben, wenn die Temperatur im Stator der elektrischen Maschine, im Kühlmantel oder in der Nähe des Kühlmantels einen vorgegebenen Schwellenwert unterschreitet.Accordingly, a method for avoiding the boiling of the coolant for cooling the at least one electric machine of a hybrid powertrain comprehensive motor vehicle is proposed in the context of a boiling of the coolant by an embodiment of the driving strategy of the vehicle depending on the stator temperature or the coolant temperature in the cooling jacket or a Temperature is avoided near the cooling jacket and / or in dependence of the coolant flow rate of the cooling circuit. According to a first embodiment of the invention, it is proposed to design the driving strategy as a function of the stator temperature or the coolant temperature in the cooling jacket or a temperature close to the cooling jacket; Preferably, when exceeding a predetermined temperature in the stator, in the cooling jacket or in the vicinity of the cooling jacket, a reduction in the power of the electric machine is carried out in the pulling and pushing operation; the power reduction is canceled when the temperature in the stator of the electric machine, in the cooling jacket or in the vicinity of the cooling jacket falls below a predetermined threshold.

Im Rahmen einer weiteren Ausgestaltung der Erfindung wird die Fahrstrategie in Abhängigkeit des zur Verfügung stehenden Kühlmittelvolumenstroms gestaltet; vorzugsweise wird bei Unterschreiten eines vorgegebenen Schwellenwertes für den Kühlmittelvolumenstrom eine Leistungsreduzierung der elektrischen Maschine im Zug- und Schubbetrieb durchgeführt, die aufgehoben wird, wenn der Kühlmittelvolumenstrom einen vorgegebenen Schwellenwert überschreitet.In the context of a further embodiment of the invention, the driving strategy is designed as a function of the available coolant volume flow; When the temperature falls below a predetermined threshold value for the coolant volume flow, a power reduction of the electric machine in the pulling and pushing operation is preferably carried out, which is canceled when the coolant volume flow exceeds a predetermined threshold value.

Des weiteren kann gemäß einer weiteren Variante des erfindungsgemäßen Verfahrens vorgesehen sein, dass ein Abschalten des Verbrennungsmotors unterbunden wird, wenn die Statortemperatur bzw. die Kühlmitteltemperatur im Kühlmantel oder eine Temperatur in der Nähe des Kühlmantels einen vorgegebenen Schwellenwert überschreitet, wodurch ein ein Sieden des Kühlmittels verursachender Druckabfall im Gesamtkühlsystem des Fahrzeugs vermieden wird.Furthermore, according to a further variant of the method according to the invention, provision may be made for switching off the internal combustion engine when the stator temperature or the coolant temperature in the cooling jacket or a temperature in the vicinity of the cooling jacket exceeds a predetermined threshold value, thereby causing a boiling of the coolant Pressure drop is avoided in the overall cooling system of the vehicle.

Ferner kann erfindungsgemäß vorgesehen sein, dass nach dem Abstellen des Fahrzeugs der Verbrennungsmotor für eine definierte Zeit nachläuft, damit der Druck im Kühlkreislauf aufrechterhalten bleibt und die Wärmeenergie des Stators durch das Kühlmittel abgeführt wird. Vorzugsweise ist die Nachlaufzeit des Verbrennungsmotors eine Funktion der Statortemperatur bzw. der Kühlmitteltemperatur im Kühlmantel oder einer Temperatur in der Nähe des Kühlmantels und/oder der Nachheizcharakteristik der elektrischen Maschine.Furthermore, it can be provided according to the invention that after switching off the vehicle, the internal combustion engine travels for a defined time, so that the pressure in the cooling circuit is maintained and the heat energy of the stator is dissipated by the coolant. Preferably, the follow-up time of the internal combustion engine is a function of the stator temperature or the Coolant temperature in the cooling jacket or a temperature in the vicinity of the cooling jacket and / or the Nachheizcharakteristik the electrical machine.

Gemäß der Erfindung sind die zu überwachenden Größen, wie beispielsweise die Temperatur und der Kühlmittelvolumenstrom entweder durch Sensoren und/oder durch Modelle der betreffenden Komponenten bestimmbar.According to the invention, the quantities to be monitored, such as, for example, the temperature and the coolant volume flow, can be determined either by sensors and / or by models of the relevant components.

Durch die erfindungsgemäße Konzeption wird ein Verfahren zur Verfügung gestellt, welches ohne einen signifikanten konstruktiven Mehraufwand durchführbar ist und auf einfache Weise eine zuverlässige Vermeidung des Siedens des Kühlmittels zur Kühlung der zumindest einen elektrischen Maschine eines einen Hybridantriebsstrang umfassenden Kraftfahrzeugs gewährleistet. The inventive concept, a method is provided, which is feasible without significant additional design effort and easily ensures reliable prevention of boiling of the coolant for cooling the at least one electric machine of a hybrid powertrain comprehensive motor vehicle.

Claims

Patentansprüche claims 1. Verfahren zur Vermeidung des Siedens des Kühlmittels zur Kühlung der zumindest einen an den Kühlkreislauf des Verbrennungsmotors des Fahrzeugs gekoppelten elektrischen Maschine eines einen Hybridantriebsstrang umfassenden Kraftfahrzeugs, dadurch gekennzeichnet, dass die Fahrstrategie des Fahrzeugs in Abhängigkeit der Statortemperatur bzw. der Kühlmitteltemperatur im Kühlmantel oder einer Temperatur nahe des Kühlmantels und/oder in Abhängigkeit des Kühlmittelvolumenstroms des Kühlkreislaufs gestaltet wird, derart, dass die Siedetemperatur des Kühlmittels nicht erreicht wird.1. A method for preventing the boiling of the coolant for cooling the at least one coupled to the cooling circuit of the internal combustion engine of the vehicle electric machine of a hybrid powertrain comprehensive motor vehicle, characterized in that the driving strategy of the vehicle depending on the stator temperature or the coolant temperature in the cooling jacket or a Temperature is designed near the cooling jacket and / or in dependence on the coolant volume flow of the cooling circuit, such that the boiling temperature of the coolant is not reached. 2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass bei Überschreiten einer vorgegebenen Temperatur im Stator der elektrischen Maschine, im Kühlmantel oder in der Nähe des Kühlmantels eine Leistungsreduzierung der elektrischen Maschine im Zug- und Schubbetrieb durchgeführt wird, wobei die Leistungsreduzierung aufgehoben wird, wenn die Temperatur im Stator, im Kühlmantel oder in der Nähe des Kühlmantels einen vorgegebenen Schwellenwert unterschreitet.2. The method according to claim 1, characterized in that when exceeding a predetermined temperature in the stator of the electric machine, in the cooling jacket or in the vicinity of the cooling jacket, a power reduction of the electric machine is carried out in pulling and pushing operation, wherein the power reduction is canceled if the temperature in the stator, in the cooling jacket or in the vicinity of the cooling jacket falls below a predetermined threshold. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass bei Unterschreiten eines vorgegebenen Schwellenwertes für den Kühlmittelvolumenstrom eine Leistungsreduzierung der elektrischen Maschine im Zug- und Schubbetrieb durchgeführt wird, wobei die Leistungsreduzierung aufgehoben wird, wenn der Kühlmittelvolumenstrom einen vorgegebenen Schwellenwert überschreitet.3. The method of claim 1 or 2, characterized in that falls below a predetermined threshold value for the coolant flow rate, a reduction in the power of the electric machine is performed in pulling and pushing operation, wherein the power reduction is canceled when the coolant flow exceeds a predetermined threshold. 4. Verfahren nach Anspruch 1 , 2 oder 3, dadurch gekennzeichnet, dass ein Abschalten des Verbrennungsmotors unterbunden wird, wenn die Statortemperatur bzw. die Kühlmitteltemperatur im Kühlmantel oder eine Temperatur in der Nähe des Kühlmantels einen vorgegebenen Schwellenwert überschreitet, wodurch ein ein Sieden des Kühlmittels verursachender Druckabfali im Gesamtkühlsystem des Fahrzeugs vermieden wird.4. The method of claim 1, 2 or 3, characterized in that a shutdown of the internal combustion engine is inhibited when the stator temperature or the coolant temperature in the cooling jacket or a Temperature in the vicinity of the cooling jacket exceeds a predetermined threshold, whereby a boiling of the coolant causing Druckabfali is avoided in the overall cooling system of the vehicle. 5. Verfahren nach Anspruch 1 , 2, 3 oder 4, dadurch gekennzeichnet, dass nach dem Abstellen des Fahrzeugs der Verbrennungsmotor für eine definierte Zeit nachläuft, damit der Druck im Kühlkreislauf aufrechterhalten bleibt und die Wärmeenergie des Stators durch das Kühlmittel abgeführt wird.5. The method of claim 1, 2, 3 or 4, characterized in that after stopping the vehicle, the internal combustion engine lags for a defined time, so that the pressure in the cooling circuit is maintained and the heat energy of the stator is dissipated by the coolant. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Nachlaufzeit des Verbrennungsmotors eine Funktion der Statortemperatur bzw. der Kühlmitteltemperatur im Kühlmantel oder einer Temperatur in der Nähe des Kühlmantels und/oder der Nachheizcharakteristik der elektrischen Maschine ist.6. The method according to claim 5, characterized in that the follow-up time of the internal combustion engine is a function of the stator temperature or the coolant temperature in the cooling jacket or a temperature in the vicinity of the cooling jacket and / or Nachheizcharakteristik the electric machine. 7. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Temperatur und der Kühlmittelvolumenstrom entweder durch Sensoren und/oder durch Modelle der betreffenden Komponenten bestimmbar sind. 7. The method according to any one of the preceding claims, characterized in that the temperature and the coolant flow rate can be determined either by sensors and / or by models of the respective components.
PCT/EP2009/060280 2008-08-20 2009-08-07 Method for preventing the coolant for at least one electric motor of a hybrid drive train from boiling Ceased WO2010020545A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030085576A1 (en) * 2001-11-08 2003-05-08 Kuang Ming Lang Hybrid electric vehicle control strategy to provide vehicle creep and hill holding
US20040046525A1 (en) * 2002-09-09 2004-03-11 Ford Global Technologies, Inc. Control strategy for an electric motor using real time predictions of motor capability based on thermal modeling and measurements
US20040235613A1 (en) * 2001-12-26 2004-11-25 Kazuo Aoki Hybird vehicle drive control apparatus, hybird vehicle drive control method, and program thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6664751B1 (en) * 2002-06-17 2003-12-16 Ford Motor Company Method and arrangement for a controlling strategy for electronic components in a hybrid electric vehicle
US20040045749A1 (en) * 2002-09-06 2004-03-11 Ford Global Technologies, Inc. Cooling system and method for a hybrid electric vehicle
US6955141B2 (en) * 2003-08-06 2005-10-18 General Motors Corporation Engine cooling system
DE102005050741A1 (en) * 2005-10-22 2007-04-26 Conti Temic Microelectronic Gmbh Method and device, for thermal monitoring and control of an electric motor, measures motor temperature directly and reduces motor power while a given temperature threshold is exceeded

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030085576A1 (en) * 2001-11-08 2003-05-08 Kuang Ming Lang Hybrid electric vehicle control strategy to provide vehicle creep and hill holding
US20040235613A1 (en) * 2001-12-26 2004-11-25 Kazuo Aoki Hybird vehicle drive control apparatus, hybird vehicle drive control method, and program thereof
US20040046525A1 (en) * 2002-09-09 2004-03-11 Ford Global Technologies, Inc. Control strategy for an electric motor using real time predictions of motor capability based on thermal modeling and measurements

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