EP0974742A2 - Control of a cooling circuit for a motorised vehicle - Google Patents

Control of a cooling circuit for a motorised vehicle Download PDF

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Publication number
EP0974742A2
EP0974742A2 EP99111701A EP99111701A EP0974742A2 EP 0974742 A2 EP0974742 A2 EP 0974742A2 EP 99111701 A EP99111701 A EP 99111701A EP 99111701 A EP99111701 A EP 99111701A EP 0974742 A2 EP0974742 A2 EP 0974742A2
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EP
European Patent Office
Prior art keywords
cooling
cooling circuit
regulation
location data
vehicle
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
Application number
EP99111701A
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German (de)
French (fr)
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EP0974742A3 (en
EP0974742B1 (en
Inventor
Hans-Dieter Gohl
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Mercedes Benz Group AG
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DaimlerChrysler AG
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Publication date
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Publication of EP0974742A2 publication Critical patent/EP0974742A2/en
Publication of EP0974742A3 publication Critical patent/EP0974742A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/62—Load

Definitions

  • the invention relates to a control of a cooling circuit a motor-driven vehicle according to the generic Features of claim 1.
  • a generic regulation of a cooling circuit of a motor-driven vehicle is known for example from WO89 / 04419.
  • a cooling circuit with various cooling components such as, for example, a mechanical and an electrical coolant pump for conveying the coolant, is provided for cooling the engine.
  • the control unit which controls the electric coolant pump and other components such as blinds, blowers and mixing valves, receives in addition to the coolant temperature, further information such as the engine operating temperature, the engine compartment temperature, temperatures of engine parts, ambient temperature, engine speed, driving speed and a pressure signal from the coolant. With this information, it is possible to adapt the delivery capacity of the electric coolant pump to the required cooling capacity.
  • US 5,247,440 describes a control system for a vehicle, control taking place depending on the geographic location of the vehicle.
  • the regulation of vehicle lights is claimed.
  • the geographical position of the vehicle is determined using a location system, such as a GPS (Global Positioning System).
  • the regulation of the vehicle lights takes place, for example, on the basis of the legal regulation of the respective area in which the vehicle is currently located.
  • the invention is therefore based on the object Generic control of a cooling circuit in such a way to further develop that with an improvement in cooling defined allocation of the performance of cooling components and Secondary consumers is reached.
  • the object is characterized by the features of Claim 1 solved.
  • Advantageous training and further education of the Subject of the invention are characterized by the features of Subclaims marked.
  • a major advantage of these designs is that that impending changes in the load of the engine and thus also the Cooling circuit can be recognized early and a necessary Rules of the individual cooling components and others Secondary consumers can start early before the Load change has occurred at all. So the operation of the individual cooling components designed more efficiently and the operation of the individual components in maximum load as far as possible be avoided, so that their life increases and the Fuel consumption is reduced. With early detection The cooling components can change the load of the cooling system can be controlled as required so that the vehicle electrical system is not must be overloaded. This leads to a reduction in the Petrol consumption. Because the regulation of the cooling functions early and does not take place until the load change occurs no excessive increase in engine temperature instead. So will the engine is protected and its service life is extended.
  • Fig. 1 The essential building blocks for implementing the scheme are required are shown in Fig. 1.
  • On Navigation device 11 receives via an input unit 13 a destination desired by the driver and determined via Location system 12 the current and future Location data of the vehicle.
  • the navigation device 11 transmits this data to a control unit 10, which accordingly a control program, the individual cooling components 14 and other secondary consumers 15 such as one Additional retarder brake controls.
  • a control unit 10 As shown in FIG. 2 via satellite 9 information about its own location and about upcoming changes in the load of the cooling system such as for example an upcoming slope, but also a upcoming slope.
  • This is three-dimensional for detection Location data a special navigation device 11 provided that has the ability except latitude and Length data also to determine the associated height data.
  • a special GPS (Global Positioning System) unit provided the ability has, preferably in three-dimensional measuring mode work.
  • the GPS receiver receives the radio waves from the Satellite 9 via a GPS antenna and generates GPS data including latitude, longitude, and elevation data.
  • the Navigation device 11 has a CD-ROM, the control data along with height data according to latitude and Has stored length data and also has a CD-ROM driver on who to read and output the rule and Elevation data is provided.
  • the navigation device 11 points a control unit 10 on which an alignment between the Location data and the rule data caused by the CD-Rom can be read out using CD-Rom drivers and based on the GPS data based on the GPS receiver.
  • a GPS receivers are used only in one two-dimensional measuring mode can work.
  • the control unit 10 then generates control data based on latitude and Length data from the GPS receiver and height data from the CD-ROM based.
  • Location systems 12 conceivable, such as one Dead reckoning.
  • the driver reports on the Input unit 13 of the navigation device 11 the desired Target.
  • the navigation device 11 determines the possible ones Routes. According to given parameters like that Distance consumption, time and other parameters are the Navigation device 11 for individual routes to the driver Selection.
  • the driver chooses one of the Navigation device 11 predefined routes and shares this route via the input unit 13 of the Navigation device 11 with. Are frequent from the vehicle 8 traveled the same route, this route can be done in the Navigation device 11 can also be saved and later be retrieved again.
  • FIG. 2 shows a schematic representation of a route profile, the height m of a roadway being plotted in the upper part of the representation and the coolant temperature KWT of the vehicle 8 being plotted along the route in the lower part of the representation.
  • a possible regulation of the cooling circuit of a vehicle 8 is explained in more detail using this illustration.
  • the vehicle 8 In a route previously selected by the driver, the vehicle 8 first travels on the level roadway 1. Its cooling circuit is in part-load operation.
  • the coolant pump works to cool the vehicle engine with partial delivery, so that the coolant temperature KWT does not exceed the temperature of 90 ° C.
  • the cooling fan is switched off, since in this exemplary embodiment it is only switched on from a fixed coolant temperature KWT of 93 ° C.
  • the transition of the control of the cooling circuit from part load to full load operation corresponds to the transition of the vehicle from level road 1 to a slope 2.
  • the control device receives the information of the upcoming slope 2 from the navigation device. Before the load change occurs, the control device controls the control phase T 1 . In this control phase T 1 , the cooling capacity is increased.
  • the coolant pump works with a higher delivery rate, so that the coolant temperature KWT drops to 85 ° C.
  • the engine power increases and the heat generated by the engine is dissipated by the coolant.
  • the coolant temperature KWT increases to 95 ° C. If the coolant temperature KWT exceeds 93 ° C, the cooling fan is switched on for support.
  • the GPS unit detects the end of the slope before reaching it and the transition to partial load operation when driving on level road 3 leads to a fan shutdown as soon as the coolant temperature KWT falls below 93 ° C.
  • the coolant pump is regulated back to partial delivery in accordance with the desired partial load control.
  • the early detection of a gradient leads to a full opening of the coolant regulator in accordance with control phase T 3 .
  • the coolant pump works with higher performance.
  • the coolant temperature drops to 88 ° C.
  • the retarder additional brake is also activated to keep the speed constant.
  • the control unit also controls the additional retarder brake and all other units that are intended for cooling.
  • the control unit regulates the individual units according to the load on the vehicle electrical system.
  • the retarder additional brake is partially switched off at control phase T 5 after early detection of the level roadway 5.
  • partial load operation is initiated.
  • the cooling fan is switched off.
  • the coolant pump is regulated back to partial delivery.
  • the cooling circuit is regulated in partial load on the level lane 5.
  • the control phase T 7 begins after early detection of the flat slope 6.
  • the cooling capacity controller is opened further.
  • the coolant pump works with a higher delivery rate.
  • the engine brake and a speed stabilization are activated in the control phase T 8 or, alternatively, a fan is switched on for the braking power.
  • the control phase T 10 of the cooling system takes place.
  • the cooling fan is switched off and the coolant pump works with partial delivery. If the driver leaves the route selected at the beginning, this leads to an error message which forces the driver to choose a new route.
  • the future location data for the newly selected route are determined and the control of the individual cooling components is geared towards this.

Abstract

The cooling circuit of a motor vehicle is controlled and altered according to the determined position of the vehicle and its forthcoming position, according to the road it is traveling on. For example if the vehicle is approaching a hill the cooling capacity is increased before the hill is reached. The current position is determined using a GPS receiver and the navigational system includes a CD-ROM with roads and associated data for example altitude variations.

Description

Die Erfindung betrifft eine Regelung eines Kühlkreislaufes eines motorgetriebenen Fahrzeuges gemäß den gattungsbildenden Merkmalen des Anspruchs 1.The invention relates to a control of a cooling circuit a motor-driven vehicle according to the generic Features of claim 1.

Eine gattungsgemäße Regelung eines Kühlkreislaufes eines motorgetriebenen Fahrzeuges ist beispielsweise aus der WO89/04419 bekannt. Zur Kühlung des Motors ist ein Kühlkreislauf mit verschiedenen Kühlkomponenten, wie beispielsweise eine mechanische und eine elektrische Kühlmittelpumpe zur Förderung des Kühlmittels vorgesehen. Die Steuereinheit, die die elektrische Kühlmittelpumpe und andere Komponenten, wie Jalousie, Gebläse und Mischventile ansteuert, erhält zusätzlich zur Kühlmitteltemperatur, weitere Informationen wie beispielsweise die Motorbetriebstemperatur, die Motorraumtemperatur, Temperaturen von Motorteilen, Umgebungstemperatur, Motordrehzahl, Fahrgeschwindigkeit sowie ein Drucksignal des Kühlmittels. Mit diesen Informationen ist eine Anpassung der Förderleistung der elektrischen Kühlmittelpumpe an die erforderliche Kühlleistung möglich. Bei hoher Motorleistung wird die Kühlleistung durch Erhöhen der Förderleistung der Kühlmittelpumpe oder durch Zuschalten eines Kühllüfters erhöht.
Die US 5,247,440 beschreibt ein Regelsystem für ein Fahrzeug, wobei eine Regelung in Abhängigkeit der geographischen Lage des Fahrzeuges erfolgt. Beansprucht wird insbesondere die Regelung der Fahrzeuglichter. Hierbei wird die geographische Lage des Fahrzeugs über ein Ortungssystem, wie beispielsweise ein GPS (Global Positioning System) ermittelt. Die Regelung der Fahrzeuglichter erfolgt beispielsweise aufgrund der gesetzlichen Regelung des jeweiligen Gebietes, indem sich das Fahrzeug gerade befindet.A generic regulation of a cooling circuit of a motor-driven vehicle is known for example from WO89 / 04419. A cooling circuit with various cooling components, such as, for example, a mechanical and an electrical coolant pump for conveying the coolant, is provided for cooling the engine. The control unit, which controls the electric coolant pump and other components such as blinds, blowers and mixing valves, receives in addition to the coolant temperature, further information such as the engine operating temperature, the engine compartment temperature, temperatures of engine parts, ambient temperature, engine speed, driving speed and a pressure signal from the coolant. With this information, it is possible to adapt the delivery capacity of the electric coolant pump to the required cooling capacity. In the case of high engine output, the cooling output is increased by increasing the delivery capacity of the coolant pump or by switching on a cooling fan.
US 5,247,440 describes a control system for a vehicle, control taking place depending on the geographic location of the vehicle. In particular, the regulation of vehicle lights is claimed. Here, the geographical position of the vehicle is determined using a location system, such as a GPS (Global Positioning System). The regulation of the vehicle lights takes place, for example, on the basis of the legal regulation of the respective area in which the vehicle is currently located.

Bei der gattungsgemäßen Regelung eines Kühlkreislaufes ist von Nachteil, daß die Regelung durch Bestimmung der Temperatur des zu kühlenden Motorteiles oder durch Bestimmung der Temperatur des Kühlmittels mittels Temperaturfühlern oder durch Bestimmung des Kühlmitteldruckes mit Hilfe eines Druckfühlers erfolgt. Erst bei Auftreten einer Erhöhung der Temperatur werden Maßnahmen eingeleitet, die Kühlleistung beispielsweise durch Erhöhen der Kühlmittelförderleistung oder durch Zuschalten des Kühllüfters zu erhöhen. Bei starker Belastung des Motors, beispielsweise durch Befahren einer Steigung, kann die zur Kühlung benötigte Kühlleistung, die durch Ansteuern der einzelnen Kühlkomponenten erreicht wird, das Bordnetz stark belasten und den Kraftstoffverbrauch erhöhen.In the generic regulation of a cooling circuit is from Disadvantage that the regulation by determining the temperature of the engine part to be cooled or by determining the temperature the coolant using temperature sensors or by determination the coolant pressure with the help of a pressure sensor. Only when an increase in temperature occurs Measures initiated, for example, by the cooling capacity Increase the coolant delivery rate or by switching on the Increase cooling fan. When the engine is under heavy load, for example by driving up a slope, the to Cooling required cooling capacity by controlling the individual cooling components is reached, the electrical system strong burden and increase fuel consumption.

Der Erfindung liegt daher die Aufgabe zugrunde, eine gattungsgemäße Regelung eines Kühlkreislaufes derart weiterzubilden, daß eine Verbesserung der Kühlung mit definierter Zuteilung der Leistung von Kühlkomponenten und Sekundärverbrauchern erreicht wird.The invention is therefore based on the object Generic control of a cooling circuit in such a way to further develop that with an improvement in cooling defined allocation of the performance of cooling components and Secondary consumers is reached.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Aus- und Weiterbildungen des Erfindungsgegenstandes sind durch die Merkmale der Unteransprüche gekennzeichnet.According to the invention, the object is characterized by the features of Claim 1 solved. Advantageous training and further education of the Subject of the invention are characterized by the features of Subclaims marked.

Ein wesentlicher Vorteil dieser Ausgestaltungen liegt darin, daß bevorstehende Laständerungen des Motors und damit auch des Kühlkreislaufes frühzeitig erkannt werden und ein nötiges Regeln der einzelnen Kühlkomponenten und anderer Sekundärverbraucher frühzeitig beginnen kann, noch bevor die Laständerung überhaupt eingetreten ist. So kann der Betrieb der einzelnen Kühlkomponenten effizienter gestaltet und der Betrieb der einzelnen Komponenten in Höchstlast weitestgehendst vermieden werden, so daß ihre Lebensdauer erhöht und der Kraftstoffverbrauch reduziert wird. Bei frühzeitigem Erkennen einer Laständerung des Kühlsystems können die Kühlkomponenten bedarfsmäßig angesteuert werden, so daß das Bordnetz nicht überlastet werden muß. Dies führt zu einer Verringerung des Benzinverbrauchs. Da die Regelung der Kühlfunktionen frühzeitig einsetzt und nicht erst, wenn die Laständerung eintritt, findet keine allzu starke Erhöhung der Motortemperatur statt. So wird der Motor geschont und seine Lebensdauer verlängert.A major advantage of these designs is that that impending changes in the load of the engine and thus also the Cooling circuit can be recognized early and a necessary Rules of the individual cooling components and others Secondary consumers can start early before the Load change has occurred at all. So the operation of the individual cooling components designed more efficiently and the operation of the individual components in maximum load as far as possible be avoided, so that their life increases and the Fuel consumption is reduced. With early detection The cooling components can change the load of the cooling system can be controlled as required so that the vehicle electrical system is not must be overloaded. This leads to a reduction in the Petrol consumption. Because the regulation of the cooling functions early and does not take place until the load change occurs no excessive increase in engine temperature instead. So will the engine is protected and its service life is extended.

Die Erfindung wird anhand eines Ausführungsbeispieles in Verbindung mit der Figurenbeschreibung näher erläutert. Es zeigen

Fig. 1
ein Blockschaltbild für die Regelung eines Kühlkreislaufes,
Fig. 2
eine schematische Darstellung eines Streckenprofils.
The invention is explained in more detail using an exemplary embodiment in conjunction with the description of the figures. Show it
Fig. 1
a block diagram for the control of a cooling circuit,
Fig. 2
a schematic representation of a route profile.

Die wesentlichen Bausteine, die zur Durchführung der Regelung benötigt werden, sind in Fig. 1 dargestellt. Ein Navigationseinrichtung 11 erhält über eine Eingabeeinheit 13 ein vom Fahrer gewünschtes Fahrziel und ermittelt über ein Ortungssystem 12 die derzeitigen und die zukünftigen Standortdaten des Fahrzeuges. Die Navigationseinrichtung 11 übermittelt diese Daten an ein Steuergerät 10, das entsprechend einem Steuerprogramm die einzelnen Kühlkomponenten 14 und andere Sekundärverbraucher 15 wie beispielsweise eine Retarderzusatzbremse regelt. Das Fahrzeug 8 erhält wie in Fig. 2 über Satelliten 9 Informationen über seine eigene Lage und über anstehende Laständerungen des Kühlsystems wie beispielsweise eine anstehende Steigung, aber auch ein anstehendes Gefälle. Hierzu ist zur Erkennung dreidimensionaler Standortdaten eine spezielle Navigationseinrichtung 11 vorgesehen, die die Fähigkeit besitzt, außer Breiten- und Längendaten auch die dazugehörigen Höhendaten zu ermitteln. Zum Empfang und zur Verarbeitung der Satellitendaten ist als Ortungssystem 12 beispielsweise eine spezielle GPS (Global Positioning System)-Einheit vorgesehen, die die Fähigkeit besitzt, bevorzugt in dreidimensionaler Meßbetriebsart zu arbeiten. Der GPS-Empfänger empfängt die Funkwellen von dem Satelliten 9 über eine GPS-Antenne und erzeugt GPS-Daten einschließlich Breiten-, Längen- und Höhendaten. Die Navigationseinrichtung 11 weist eine CD-ROM auf, die Regeldaten zusammen mit Höhendaten entsprechend der Breiten- und Längendaten gespeichert hat und weist außerdem einen CD-ROM-Treiber auf, der zum Lesen und Ausgeben der Regel- und Höhendaten vorgesehen ist. Die Navigationseinrichtung 11 weist ein Steuergerät 10 auf, das ein Angleichen zwischen den Standortdaten und den Regeldaten bewirkt, die von der CD-Rom mittels CD-Rom-Treiber ausgelesen werden und die auf den GPS-Daten vom GPS-Empfänger basieren. Als Alternative kann auch ein GPS-Empfänger Verwendung finden, der nur in einer zweidimensionalen Meßbetriebsart arbeiten kann. Das Steuergerät 10 erzeugt dann Regeldaten, die auf den Breiten- und Längendaten des vom GPS-Empfänger und den Höhendaten vom CD-ROM basieren. Anstatt einer GPS-Einheit sind auch andere Ortungssysteme 12 denkbar, wie beispielsweise eine Koppelnavigation. Vor Fahrtbeginn gibt der Fahrer über die Eingabeeinheit 13 der Navigationseinrichtung 11 das gewünschte Ziel an. Die Navigationseinrichtung 11 ermittelt die möglichen Fahrtrouten. Entsprechend vorgegebener Parameter wie dem Streckenverbrauch, der Zeit und anderer Parameter gibt die Navigationseinrichtung 11 dem Fahrer einzelne Routen zur Auswahl. Der Fahrer wählt vor Fahrtbeginn eine der von der Navigationseinrichtung 11 vorgegebenen Routen aus und teilt diese Route über die Eingabeeinheit 13 der Navigationseinrichtung 11 mit. Werden vom Fahrzeug 8 häufig dieselbe Route zurückgelegt, kann diese Route in der Navigationseinrichtung 11 auch abgespeichert werden und später wieder abgerufen werden.The essential building blocks for implementing the scheme are required are shown in Fig. 1. On Navigation device 11 receives via an input unit 13 a destination desired by the driver and determined via Location system 12 the current and future Location data of the vehicle. The navigation device 11 transmits this data to a control unit 10, which accordingly a control program, the individual cooling components 14 and other secondary consumers 15 such as one Additional retarder brake controls. As shown in FIG. 2 via satellite 9 information about its own location and about upcoming changes in the load of the cooling system such as for example an upcoming slope, but also a upcoming slope. This is three-dimensional for detection Location data a special navigation device 11 provided that has the ability except latitude and Length data also to determine the associated height data. To the Reception and processing of the satellite data is as Location system 12, for example, a special GPS (Global Positioning System) unit provided the ability has, preferably in three-dimensional measuring mode work. The GPS receiver receives the radio waves from the Satellite 9 via a GPS antenna and generates GPS data including latitude, longitude, and elevation data. The Navigation device 11 has a CD-ROM, the control data along with height data according to latitude and Has stored length data and also has a CD-ROM driver on who to read and output the rule and Elevation data is provided. The navigation device 11 points a control unit 10 on which an alignment between the Location data and the rule data caused by the CD-Rom can be read out using CD-Rom drivers and based on the GPS data based on the GPS receiver. As an alternative, a GPS receivers are used only in one two-dimensional measuring mode can work. The control unit 10 then generates control data based on latitude and Length data from the GPS receiver and height data from the CD-ROM based. Instead of a GPS unit there are also others Location systems 12 conceivable, such as one Dead reckoning. Before the start of the journey, the driver reports on the Input unit 13 of the navigation device 11 the desired Target. The navigation device 11 determines the possible ones Routes. According to given parameters like that Distance consumption, time and other parameters are the Navigation device 11 for individual routes to the driver Selection. Before starting the journey, the driver chooses one of the Navigation device 11 predefined routes and shares this route via the input unit 13 of the Navigation device 11 with. Are frequent from the vehicle 8 traveled the same route, this route can be done in the Navigation device 11 can also be saved and later be retrieved again.

Fig. 2 zeigt eine schematische Darstellung eines Streckenprofils, wobei im oberen Teil der Darstellung die Höhenlage m einer Fahrbahn und im unteren Teil der Darstellung die Kühlmitteltemperatur KWT des Fahrzeuges 8 entlang der Strecke aufgetragen ist. Anhand dieser Darstellung wird eine mögliche Regelung des Kühlkreislaufes eines Fahrzeuges 8 näher erläutert. Bei einer vom Fahrer zuvor gewählten Route fährt das Fahrzeug 8 zuerst auf der ebenen Fahrbahn 1. Sein Kühlkreislauf ist in Teillastbetrieb. Die Kühlmittelpumpe arbeitet zur Kühlung des Fahrzeugmotors mit Teilförderleistung, so daß die Kühlmitteltemperatur KWT die Temperatur von 90°C nicht übersteigt. Der Kühllüfter ist abgeschaltet, da er in diesem Ausführungsbeispiel erst ab einer fest vorgegebenen Kühlmitteltemperatur KWT von 93°C eingeschaltet wird.
Der Übergang der Regelung des Kühlkreislaufes von Teillast in Vollastbetrieb entspricht dem Übergang des Fahrzeuges von der ebenen Fahrbahn 1 zu einer Steigung 2. Das Steuergerät erhält von der Navigationseinrichtung die Information der anstehenden Steigung 2. Bevor die Laständerung eintritt, steuert das Steuergerät die Regelphase T1. In dieser Regelphase T1 wird die Kühlleistung erhöht. Die Kühlmittelpumpe arbeitet mit höherer Förderleistung, so daß die Kühlmitteltemperatur KWT auf 85°C abfällt. Bei Befahren der Steigung 2 steigt die Motorleistung an und die dabei vom Motor erzeugte Wärme wird vom Kühlmittel abgeführt. Dabei erhöht sich die Kühlmitteltemperatur KWT bis auf 95°C. Bei Übersteigen der Kühlmitteltemperatur KWT von 93°C wird der Kühllüfter zur Unterstützung zugeschaltet. Mit der GPS-Einheit wird das Steigungsende vor Erreichen erkannt und der Übergang auf Teillastbetrieb bei Befahren der ebenen Fahrbahn 3 führt zu einer Lüfterabschaltung, sobald die Kühlmitteltemperatur KWT von 93°C unterschritten wird. In der Regelphase T2 wird entsprechend gewünschter Teillastregelung die Kühlmittelpumpe auf Teilförderung zurückgeregelt. Die Früherkennung eines Gefälles führt zu einer Vollöffnung des Kühlmittelreglers, entsprechend Regelphase T3. Die Kühlmittelpumpe arbeitet mit höherer Leistung. Die Kühlmitteltemperatur fällt auf 88°C ab. Bei Befahren des Gefälles in der Regelphase T4 ist zur Geschwindigkeitskonstanthaltung zusätzlich die Retarderzusatzbremse aktiviert. Das Steuergerät steuert auch die Retarderzusatzbremse und alle weiteren Aggregate, die für die Kühlung vorgesehen sind. Entsprechend der Belastung des Bordnetzes regelt das Steuergerät die einzelnen Aggregate.
Beim Übergang von Bremsbetrieb in Teillastbetrieb wird nach Früherkennung der ebenen Fahrbahn 5 die Retarderzusatzbremse bei Regelphase T5 teilweise abgeschaltet. In der Regelphase T6 wird der Teillastbetrieb eingeleitet. Der Kühllüfter wird abgeschaltet. Die Kühlmittelpumpe wird auf Teilförderleistung zurückgeregelt. Auf der ebenen Fahrbahn 5 wird der Kühlkreislauf in Teillast geregelt.
Beim Übergang von Teillast in den Bremsbetrieb bei Befahren des flachen Gefälles, beginnt nach Früherkennung des flachen Gefälles 6 die Regelphase T7. Der Kühlleistungsregler wird weiter geöffnet. Die Kühlmittelpumpe arbeitet mit höherer Förderleistung.
Bei Befahren des flachen Gefälles 6 wird in der Regelphase T8 die Motorbremse und eine Geschwindigkeitsstabilisierung aktiviert oder alternativ ein Lüfter für die Bremsleistung zugeschaltet. Das Befahren des flachen Gefälles bis Regelphase T9 erfolgt mit konstanter Geschwindigkeit.
Bei Befahren der ebenen Fahrbahn 7 erfolgt die Regelphase T10 des Kühlsystems. Der Kühllüfter wird abgeschaltet und die Kühlmittelpumpe arbeitet mit Teilförderleistung.
Verläßt der Fahrer seine zu Beginn gewählte Route, führt dies zu einer Fehlermeldung, die den Fahrer zu einer erneuten Routenauswahl zwingt. Für die neu gewählte Route werden die zukünftigen Standortdaten bestimmt und hierauf die Regelung der einzelnen Kühlkomponenten ausgerichtet.2 shows a schematic representation of a route profile, the height m of a roadway being plotted in the upper part of the representation and the coolant temperature KWT of the vehicle 8 being plotted along the route in the lower part of the representation. A possible regulation of the cooling circuit of a vehicle 8 is explained in more detail using this illustration. In a route previously selected by the driver, the vehicle 8 first travels on the level roadway 1. Its cooling circuit is in part-load operation. The coolant pump works to cool the vehicle engine with partial delivery, so that the coolant temperature KWT does not exceed the temperature of 90 ° C. The cooling fan is switched off, since in this exemplary embodiment it is only switched on from a fixed coolant temperature KWT of 93 ° C.
The transition of the control of the cooling circuit from part load to full load operation corresponds to the transition of the vehicle from level road 1 to a slope 2. The control device receives the information of the upcoming slope 2 from the navigation device. Before the load change occurs, the control device controls the control phase T 1 . In this control phase T 1 , the cooling capacity is increased. The coolant pump works with a higher delivery rate, so that the coolant temperature KWT drops to 85 ° C. When driving on slope 2, the engine power increases and the heat generated by the engine is dissipated by the coolant. The coolant temperature KWT increases to 95 ° C. If the coolant temperature KWT exceeds 93 ° C, the cooling fan is switched on for support. The GPS unit detects the end of the slope before reaching it and the transition to partial load operation when driving on level road 3 leads to a fan shutdown as soon as the coolant temperature KWT falls below 93 ° C. In the control phase T 2 , the coolant pump is regulated back to partial delivery in accordance with the desired partial load control. The early detection of a gradient leads to a full opening of the coolant regulator in accordance with control phase T 3 . The coolant pump works with higher performance. The coolant temperature drops to 88 ° C. When driving down the slope in control phase T 4 , the retarder additional brake is also activated to keep the speed constant. The control unit also controls the additional retarder brake and all other units that are intended for cooling. The control unit regulates the individual units according to the load on the vehicle electrical system.
In the transition from braking operation to part-load operation, the retarder additional brake is partially switched off at control phase T 5 after early detection of the level roadway 5. In the control phase T 6 , partial load operation is initiated. The cooling fan is switched off. The coolant pump is regulated back to partial delivery. The cooling circuit is regulated in partial load on the level lane 5.
When transitioning from partial load to braking operation when driving on a flat slope, the control phase T 7 begins after early detection of the flat slope 6. The cooling capacity controller is opened further. The coolant pump works with a higher delivery rate.
When driving on the flat slope 6, the engine brake and a speed stabilization are activated in the control phase T 8 or, alternatively, a fan is switched on for the braking power. Driving on the flat slope until control phase T 9 takes place at a constant speed.
When driving on the level road 7, the control phase T 10 of the cooling system takes place. The cooling fan is switched off and the coolant pump works with partial delivery.
If the driver leaves the route selected at the beginning, this leads to an error message which forces the driver to choose a new route. The future location data for the newly selected route are determined and the control of the individual cooling components is geared towards this.

Claims (11)

Regelung eines Kühlkreislaufes eines motorgetriebenen Fahrzeuges in Abhängigkeit einer Laständerung des Motors, dadurch gekennzeichnet,
daß die derzeitigen Standortdaten des Fahrzeuges (8) und die zukünftigen Standortdaten der vorausliegenden Strecke ermittelt werden und bei einer Höhenänderung zwischen derzeitigen und zukünftigen Standortdaten der Kühlkreislauf des Fahrzeuges (8) entsprechend der zu erwartenden Laständerung frühzeitig geregelt wird.Regulation of a cooling circuit of a motor-driven vehicle depending on a change in the load of the engine, characterized in that
that the current location data of the vehicle (8) and the future location data of the route ahead are determined and if there is a change in height between the current and future location data, the cooling circuit of the vehicle (8) is regulated early in accordance with the expected change in load. Regelung eines Kühlkreislaufes nach Anspruch 1,
dadurch gekennzeichnet,
daß die Standortdaten Längen-, Breiten- und Höhenangaben aufweisen.Regulation of a cooling circuit according to claim 1,
characterized,
that the location data have latitude, longitude and latitude information. Regelung eines Kühlkreislaufes nach den Ansprüchen 1 oder 2,
dadurch gekennzeichnet,
daß bei einer zukünftigen Steigerung der Motorleistung die Kühlleistung erhöht wird.Regulation of a cooling circuit according to claims 1 or 2,
characterized,
that with a future increase in engine output, the cooling output will be increased. Regelung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß bei einer positiven Höhenänderung zwischen derzeitigen und zukünftigen Standortdaten, entsprechend einer Steigung (2) und/oder bei einer negativen Höhenänderung zwischen derzeitigen und zukünftigen Standortdaten entspechend einem Gefälle (4) die Förderleistung einer Kühlmittelpumpe des Kühlkreislaufes erhöht wird. Regulation according to one of claims 1 to 3,
characterized,
that in the event of a positive change in height between current and future location data, corresponding to an incline (2) and / or in the event of a negative change in height between current and future location data, the delivery capacity of a coolant pump of the cooling circuit is increased. Regelung nach Anspruch 4,
dadurch gekennzeichnet,
daß bei Befahren einer ebenen Fahrbahn (1) und bei Übergang auf eine ebene Fahrbahn (5) die Kühlmittelpumpe in Teilförderleistung betrieben wird.Regulation according to claim 4,
characterized,
that when driving on a flat road (1) and when changing to a flat road (5) the coolant pump is operated in partial delivery. Regelung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß
das Fahrzeug (8) ein Ortungssystem (12) und eine Navigationseinrichtung (11) mit einer CD-ROM zur Ermittlung der derzeitigen und zukünftigen Standortdaten und zur Weitergabe dieser Daten an ein Steuergerät (10) aufweist.Regulation according to one of claims 1 to 5,
characterized,
that
the vehicle (8) has a location system (12) and a navigation device (11) with a CD-ROM for determining the current and future location data and for forwarding this data to a control unit (10). Regelung nach Anspruch 6,
dadurch gekennzeichnet,
daß das Steuergerät (10) durch Steuerung von Kühlkomponenten (14) den Kühlkreislauf regelt.Regulation according to claim 6,
characterized,
that the control unit (10) regulates the cooling circuit by controlling cooling components (14). Regelung nach Anspruch 7,
dadurch gekennzeichnet,
daß als Kühlkomponenten (14) wenigstens eine regelbare Kühlmittelpumpe zur Förderung des Kühlmittels und ein regelbarer Kühllüfter vorgesehen sind.Regulation according to claim 7,
characterized,
that at least one controllable coolant pump for conveying the coolant and a controllable cooling fan are provided as cooling components (14). Regelung nach Anspruch 8, dadurch gekennzeichnet,
daß ab einer vorgegebenen Kühlmitteltemperatur (KWT) der Kühllüfter zugeschaltet ist.Regulation according to claim 8, characterized in
that the cooling fan is switched on from a predetermined coolant temperature (KWT). Regelung nach einem der Ansprüche 6 bis 9,
dadurch gekennzeichnet,
daß das Steuergerät (10) auch Sekundärverbraucher (15) regelt. Regulation according to one of claims 6 to 9,
characterized,
that the control device (10) also regulates secondary consumers (15). Regelung nach einem der Ansprüche 6 bis 10,
dadurch gekennzeichnet,
daß bei Befahren des Gefälles (4) das Steuergerät (10) eine Retarderbremse zuschaltet.Regulation according to one of claims 6 to 10,
characterized,
that when driving down the slope (4) the control unit (10) engages a retarder brake.
EP19990111701 1998-07-21 1999-06-17 Control of a cooling circuit for a motorised vehicle Expired - Lifetime EP0974742B1 (en)

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DE19832626 1998-07-21
DE1998132626 DE19832626C1 (en) 1998-07-21 1998-07-21 Regulation of a cooling circuit of a motor-driven vehicle

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FR2816674A1 (en) * 2000-11-10 2002-05-17 Renault Method, for monitoring operation of vehicle cooling fan system, measures coolant temperature before and after fan operation to ensure successful operation
EP2148059A2 (en) * 2008-07-25 2010-01-27 Voith Patent GmbH Cooling system, in particular for a motor vehicle
EP2148059A3 (en) * 2008-07-25 2012-02-08 Voith Patent GmbH Cooling system, in particular for a motor vehicle
EP2559878A1 (en) 2008-07-25 2013-02-20 Voith Patent GmbH Cooling system, in particular for a motor vehicle
US8286437B2 (en) 2010-06-30 2012-10-16 Thermo King Corporation Transport refrigeration system with predictive refrigeration
WO2012079608A1 (en) * 2010-12-17 2012-06-21 Volvo Lastvagnar Ab Method to control a drivetrain of a vehicle
CN103261619A (en) * 2010-12-17 2013-08-21 沃尔沃拉斯特瓦格纳公司 Method to control a drivetrain of a vehicle
US9096215B2 (en) 2010-12-17 2015-08-04 Volvo Lastvagnar Ab Method to control a drivetrain of a vehicle
RU2564459C2 (en) * 2010-12-17 2015-10-10 Вольво Ластвагнар Аб Method of control over vehicle drive system
DE102013009275A1 (en) * 2013-06-04 2014-12-04 Daimler Ag Method and device for operating a vehicle
WO2016045860A1 (en) * 2014-09-23 2016-03-31 Pierburg Gmbh System and method for predictively controlling and/or regulating a heating/cooling apparatus of a vehicle
DE102014019657A1 (en) * 2014-12-20 2016-06-23 Daimler Ag Vehicle with at least one internal combustion engine and method for operating a waste heat utilization device
WO2019145428A1 (en) * 2018-01-25 2019-08-01 Mtu Friedrichshafen Gmbh Method and device for operating a drive system, and drive system

Also Published As

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DE19832626C1 (en) 2000-03-16
EP0974742A3 (en) 2001-04-25
EP0974742B1 (en) 2004-05-12
ES2219953T3 (en) 2004-12-01

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