DE102010003000A1 - Method for controlling range-extender in electric vehicle, involves determining power rating according to required drive torque, where range-extender is controlled according to power rating - Google Patents
Method for controlling range-extender in electric vehicle, involves determining power rating according to required drive torque, where range-extender is controlled according to power rating Download PDFInfo
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- DE102010003000A1 DE102010003000A1 DE102010003000A DE102010003000A DE102010003000A1 DE 102010003000 A1 DE102010003000 A1 DE 102010003000A1 DE 102010003000 A DE102010003000 A DE 102010003000A DE 102010003000 A DE102010003000 A DE 102010003000A DE 102010003000 A1 DE102010003000 A1 DE 102010003000A1
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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Abstract
Description
Die Erfindung betrifft die Ansteuerung eines sogenannten Range-Extenders in einem Elektrofahrzeug.The invention relates to the control of a so-called range extender in an electric vehicle.
Aufgrund der begrenzten Kapazität des elektrischen Energiespeichers eines Elektrofahrzeugs, ist die Reichweite eines Elektrofahrzeugs begrenzt. Die Reichweite eines Elektrofahrzeugs ist typischerweise geringer als die Reichweite eines Kraftfahrzeugs mit Verbrennungsmotor. Außerdem dauert das Aufladen des elektrischen Energiespeichers deutlich länger als das Betanken eines Kraftfahrzeugs mit Verbrennungsmotor.Due to the limited capacity of the electric energy storage of an electric vehicle, the range of an electric vehicle is limited. The range of an electric vehicle is typically less than the range of a motor vehicle with an internal combustion engine. In addition, the charging of the electric energy storage takes much longer than the refueling of a motor vehicle with an internal combustion engine.
Ein Range-Extender (auch als Reichweiten-Verlängerer bezeichnet) ist ein zusätzliches Aggregat in einem Elektrofahrzeug, welches es erlaubt, die Reichweite des Elektrofahrzeugs zu vergrößern. Typischerweise umfasst ein Range-Extender einen Verbrennungsmotor und einen mechanisch mit dem Verbrennungsmotor gekoppelten elektrischen Generator. Bei Betrieb des Verbrennungsmotors wird der elektrische Generator des Range-Extenders von dem Verbrennungsmotor angetrieben.A range extender (also called range extender) is an additional unit in an electric vehicle that allows to increase the range of the electric vehicle. Typically, a range extender includes an internal combustion engine and an electrical generator mechanically coupled to the internal combustion engine. During operation of the internal combustion engine, the electric generator of the range extender is driven by the internal combustion engine.
Aus der Druckschrift
Ein weiteres Verfahren zur Steuerung eines Range-Extenders ist in der Druckschrift
Es ist Aufgabe der Erfindung, ein Verfahren zum Ansteuern eines Range-Extenders anzugeben. Das Verfahren sollte einfach zu realisieren sein und sich möglichst einfach in bekannte Momentenstrukturen für die Längsführung einbinden lassen. Ferner ist die Erfindung auf eine entsprechende Steuervorrichtung für einen Range-Extender gerichtet.It is an object of the invention to provide a method for driving a range extender. The method should be easy to implement and can be integrated into known torque structures for the longitudinal guidance as simply as possible. Furthermore, the invention is directed to a corresponding control device for a range extender.
Die Aufgabe wird durch die Merkmale der unabhängigen Patentansprüche gelöst.The object is solved by the features of the independent claims.
Ein erster Aspekt der Erfindung betrifft ein Verfahren zum Steuern eines Range-Extenders in einem Elektrofahrzeug. Das Elektrofahrzeug umfasst eine erste elektrische Maschine zum Antrieb des Kraftfahrzeugs sowie ferner einen elektrischen Energiespeicher zur Versorgung der ersten elektrischen Maschine (beispielsweise eine Batterie oder einen Kondensator). Ferner ist ein Range-Extender zur elektrischen Energieversorgung der ersten elektrischen Maschine und/oder des elektrischen Energiespeichers vorhanden. Der Range-Extender umfasst einen Verbrennungsmotor und eine mechanisch mit dem Verbrennungsmotor gekoppelte zweite elektrische Maschine. Gemäß dem Verfahren wird eine Leistungsangabe in Abhängigkeit eines angeforderten Antriebsdrehmomentes bestimmt. Das angeforderte Antriebsdrehmoment basiert auf dem Fahrerwunsch. Der Range-Extender wird dann in Abhängigkeit der Leistungsangabe gesteuert.A first aspect of the invention relates to a method for controlling a range extender in an electric vehicle. The electric vehicle includes a first electric machine for driving the motor vehicle and also an electric energy storage for supplying the first electric machine (for example, a battery or a capacitor). Furthermore, a range extender for the electrical power supply of the first electric machine and / or the electrical energy storage device is present. The range extender includes an internal combustion engine and a second electric machine mechanically coupled to the internal combustion engine. According to the method, a performance indication is determined in dependence on a requested drive torque. The requested drive torque is based on the driver's request. The range extender is then controlled as a function of the power specification.
Das erfindungsgemäße Verfahren erlaubt es, die Steuerung des Range-Extenders auf einfache Weise in die bekannte Momentenstruktur für die Längsführung eines Fahrzeugs einzubinden. Ein vom Fahrer gewünschtes Antriebsdrehmoment, welches in einer konventionellen Momentenstruktur als Signal typischerweise bereits verfügbar ist, lässt sich in ein Leistungssignal überführen, welches dann als Basis für die Ansteuerung des Range-Extenders dient.The method according to the invention makes it possible to easily integrate the control of the range extender into the known torque structure for the longitudinal guidance of a vehicle. A desired by the driver drive torque, which is typically already available in a conventional torque structure as a signal can be converted into a power signal, which then serves as the basis for controlling the range extender.
Bei der Leistungsangabe handelt es sich vorzugsweise um eine angeforderte Antriebsleistung oder um die angeforderte Leistung des Range-Extenders.The power specification is preferably a requested drive power or the requested power of the range extender.
Die angeforderte Leistung des Range-Extenders lässt sich aus dem angeforderten Antriebsmoment, der aktuellen Drehzahl der ersten elektrischen Maschine (oder aus einer anderen Drehzahl des Antriebsstrangs, wie z. B. die Raddrehzahl) sowie weiterer Parameter bestimmen. Diese Leistung kann dann vom Range-Extender bei typischerweise anderer Drehzahl des Verbrennungsmotors (diese Drehzahl entspricht gewöhnlich auch der Drehzahl der zweiten elektrischen Maschine) und entsprechend anderem Moment des Verbrennungsmotors eingestellt werden.The requested power of the range extender may be determined from the requested drive torque, the current speed of the first electric machine (or other powertrain speed, such as wheel speed), and other parameters. This power can then be adjusted by the range extender at typically different engine speed (this speed usually also corresponds to the speed of the second electric machine) and according to other engine torque.
Vorzugsweise werden zwei Leistungsangaben bestimmt: Zunächst wird eine angeforderte Antriebsleistung basierend auf dem angeforderten Antriebsdrehmoment bestimmt (hierbei kann ferner die aktuelle Drehzahl der ersten elektrischen Maschine berücksichtigt werden). Basierend auf der angeforderten Antriebsleistung und eines oder mehrerer Parameter des elektrischen Energiespeichers und/oder Bordnetzes lässt sich dann die angeforderte Leistung des Range-Extenders bestimmen. Die angeforderte Leistung des Range-Extenders wird also vorzugsweise in Abhängigkeit der angeforderten Antriebsleistung sowie der durch den elektrischen Energiespeicher und/oder durch das Bordnetz vorgegebenen Anforderungen ermittelt.Preferably, two performance specifications are determined: First, a requested drive power is determined based on the requested drive torque (in this case, furthermore, the current speed of the first electric machine can be taken into account). Based on the requested drive power and one or more parameters of the electrical energy storage and / or electrical system can then determine the requested power of the range extender. The requested power of the range extender is thus determined preferably as a function of the requested drive power as well as the requirements imposed by the electrical energy store and / or by the vehicle electrical system.
Bei den Parametern des elektrischen Energiespeichers (beispielsweise Lade- und/oder Entladeparameter) und/oder des Bordnetzes handelt es sich typischerweise auch um Leistungsgrößen, die mit der angeforderten Antriebsleistung auf einfache Weise in Beziehung gesetzt werden können.The parameters of the electrical energy storage device (for example, charging and / or discharging parameters) and / or the vehicle electrical system are typically also output quantities that can be easily related to the required drive power.
Vorzugsweise wird die Leistung des Range-Extenders in Abhängigkeit einer maximalen Abgabeleistung des elektrischen Energiespeichers bestimmt. The power of the range extender is preferably determined as a function of a maximum output power of the electrical energy store.
Ein weiteres Beispiel für einen nutzbaren Parameter ist die geforderte Sollleistung zur Ladung des elektrischen Energiespeichers und/oder Zur Speisung des Bordnetzes.Another example of a usable parameter is the required nominal power for charging the electrical energy storage and / or for supplying the electrical system.
Ein anderes Beispiel für einen derartigen Parameter ist die maximale Aufnahmeleistung des elektrischen Energiespeichers. Hierbei ist anzumerken, dass die Aufnahmeleistung des Energiespeichers, beispielsweise einer Batterie, typischerweise begrenzt ist.Another example of such a parameter is the maximum power consumption of the electrical energy storage. It should be noted that the power consumption of the energy storage, such as a battery, is typically limited.
Gemäß einer vorteilhaften Ausführungsform werden (neben dem angeforderten Drehmoment) drei weitere Schnittstellen verwendet, um den Range-Extender abhängig vom Fahrerwunsch und der zur Verfügung stehenden Leistung des elektrischen Energiespeichers zu steuern: nämlich die maximalen Abgabeleistung des elektrischen Energiespeichers, die geforderte Sollleistung zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzes sowie die maximale Aufnahmeleistung des elektrischen Energiespeichers.According to an advantageous embodiment (in addition to the requested torque), three further interfaces are used to control the range extender depending on the driver's request and the available power of the electric energy storage: namely, the maximum power output of the electric energy storage, the required target power to charge the electrical energy storage and / or to power the electrical system and the maximum power of the electrical energy storage device.
Die drei Schnittstellen ermöglichen es, die Leistung des Range-Extenders durch eine strategische Leistungskoordination zu beeinflussen.The three interfaces make it possible to influence the performance of the range extender through strategic performance coordination.
Die angeforderte Leistung des Range-Extenders lässt sich beispielsweise aus der angeforderten Antriebsleistung abzüglich der maximalen Abgabeleistung des elektrischen Energiespeichers zuzüglich der Sollleistung zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzes bestimmen. Hierbei kann das Ergebnis dieser Rechenoperationen noch durch einen Wirkungsgrad des Range-Extenders dividiert werden, um die angeforderte Leistung des Range-Extenders zu bestimmen. Beispielsweise lässt sich die angeforderte Leistung des Range-Extenders über folgende Gleichung bestimmen:
Hierbei beschreibt die Größe Prex die angeforderte Leistung des Range-Extenders, die Größe Pwunsch fahrer die angeforderte Antriebsleistung, die Größe Pbatt max ab die maximale Abgabeleistung des elektrischen Energiespeichers, die Größe Pbatt laden die Sollleistung zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzes und die Größe η den Wirkungsgrad des Range-Extenders.Here, the size P rex describes the requested power of the range extender, the size P desire driver the requested drive power, the size P batt max from the maximum power output of the electric energy storage, the size P batt load the target power to charge the electrical energy storage and / or for the supply of the electrical system and the size η the efficiency of the range extender.
Bei einer bevorzugten Ausführungsform des Verfahrens können die geforderte Antriebsleistung und/oder die angeforderte Leistung des Range-Extenders unter bestimmten Voraussetzungen auch einen negativen Wert annehmen.In a preferred embodiment of the method, the required drive power and / or the requested power of the range extender can also assume a negative value under certain conditions.
Die angeforderte Antriebsleistung weist beispielsweise einen negativen Wert auf, wenn das Fahrpedal losgelassen wird und das angeforderte Drehmoment aufgrund des Schleppmoments negativ wird. Eine negative angeforderte Antriebsleistung kann auch im Schubfall (z. B. bei Bergabfahrt) auftreten.For example, the requested drive power has a negative value when the accelerator pedal is released and the requested torque becomes negative due to the drag torque. A negative requested drive power can also occur in case of overrun (eg when driving downhill).
Im Fall einer negativen angeforderten Antriebsleistung wird unter Umständen auch eine negative Leistung des Range-Extenders angefordert. Bei dem Verfahren lässt sich beispielsweise im Schubfall (z. B. bei Bergabfahrt) eine negative Leistung des Range-Extenders anfordern. Eine negative Leistung des Range-Extenders ergibt sich dann, wenn die elektrische Maschine des Range-Extenders als Motor betrieben wird und der Range-Extender ohne Einspritzung gedreht wird. In diesem Fall wird keine elektrische Leistung vom Range-Extender erzeugt, sondern elektrische Leistung in der elektrischen Maschine des Range-Extenders verbraucht.In the case of a negative requested drive power, a negative power of the range extender may also be requested. In the method, for example, in the case of overrun (eg when driving downhill), a negative power of the range extender can be requested. A negative performance of the range extender results when the electric engine of the range extender is operated as a motor and the range extender is rotated without injection. In this case, no electric power is generated by the range extender, but consumes electrical power in the electric engine of the range extender.
Eine negative Leistung des Range-Extenders wird bei dem Verfahren vorzugsweise dann angefordert, wenn die maximale Leistungsaufnahme des elektrischen Energiespeichers (z. B. bei einer Bremsung mit der elektrischen Antriebsmaschine) ansonsten überschritten würde.A negative power of the range extender is preferably requested in the method if the maximum power consumption of the electrical energy store (eg during braking with the electric drive machine) would otherwise be exceeded.
Vorzugsweise wird daher bei dem Verfahren im Fall einer negativen geforderten Antriebsleistung die Summe aus
- – dem Betrag (z. B. 16 kW) der geforderten negativen Antriebsleistung (z. B –16 kW), und
- – der Sollleistung (z. B. 3 kW) zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzes
- - the amount (eg 16 kW) of the required negative drive power (eg 16 kW), and
- - The target power (eg 3 kW) for charging the electrical energy storage and / or power to the electrical system
Falls diese Summe (z. B. 19 kW) größer als die maximale Aufnahmeleistung (z. B. 10 kW) ist, wird vorzugsweise eine negative Leistung des Range-Extenders ermittelt.If this sum (eg 19 kW) is greater than the maximum recording power (eg 10 kW), preferably a negative power of the range extender is determined.
Der Betrag der Leistung des Range-Extenders ergibt sich in diesem Fall vorzugsweise aus der Differenz (z. B. 6 kW) zwischen dem Betrag (z. B. 16 kW) der geforderten negativen Antriebsleistung und der maximalen Aufnahmeleistung (z. B. 10 kW). Hierbei wird die Differenz vorzugsweise noch durch den Wirkungsgrad des Range-Extenders dividiert, um den Betrag der negativen Leistung des Range-Extenders zu ermitteln.The amount of power of the range extender in this case preferably results from the difference (eg 6 kW) between the amount (eg 16 kW) of the required negative drive power and the maximum power consumption (eg 10 kW). Here, the difference is preferably divided by the efficiency of the range extender to determine the amount of negative power of the range extender.
Falls die vorstehend erwähnte Summe (z. B. 7 kW) hingegen kleiner als die maximale Aufnahmeleistung (z. B. 10 kW) ist, und falls außerdem die angeforderte Antriebsleistung (z. B. –4 KW) kleiner als eine maximale Abgabeleistung (z. B. 50 kW) des elektrischen Energiespeichers ist, ergibt sich die Leistung des Range-Extenders aus der Leistung (z. B. 3 kW) zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzes. Hierbei wird dieser Wert vorzugsweise noch durch den Wirkungsgrad des Range-Extenders dividiert. On the other hand, if the above-mentioned sum (
Gemäß einer vorteilhaften Ausführungsform werden bei dem Verfahren eine Drehzahlvorgabe und/oder ein Drehmomentvorgabe in Abhängigkeit der angeforderten Leistung des Range-Extenders bestimmt. Diese Angaben werden dann zur Steuerung des Range-Extenders verwendet.According to an advantageous embodiment, a speed specification and / or a torque specification are determined as a function of the requested power of the range extender in the method. This information is then used to control the range extender.
Beispielsweise lässt sich eine angeforderte Drehzahl des Range-Extenders in Abhängigkeit der angeforderten Leistung des Range-Extenders bestimmen. Dafür kann eine abgespeicherte Kennlinie oder ein abgespeichertes Kennlinienfeld verwendet werden, wobei jede Kennlinie des Kennlinienfeldes einer bestimmten Temperatur zugeordnet ist. Aus der angeforderten Drehzahl und der angeforderten Leistung ergibt dann das angeforderte Moment des Range-Extenders.For example, a requested speed of the range extender can be determined as a function of the requested power of the range extender. For this purpose, a stored characteristic or a stored characteristic field can be used, wherein each characteristic of the characteristic field is assigned to a specific temperature. From the requested speed and the requested power then gives the requested moment of the range extender.
Vorzugsweise werden bei dem Verfahren somit in Abhängigkeit der angeforderten Leistung des Range-Extenders eine Drehzahlvorgabe und eine Drehmomentvorgabe für den Range-Extender bestimmt.In the method, a speed specification and a torque specification for the range extender are thus preferably determined as a function of the requested power of the range extender.
Gemäß einer vorteilhaften Ausführungsform wird die Drehzahlvorgabe zur Steuerung der elektrischen Maschine des Range-Extenders verwendet, während die Drehmomentvorgabe zur Steuerung des Verbrennungsmotors verwendet wird. Dies ist deshalb von Vorteil, weil die elektrische Maschine des Range-Extenders typischerweise eine Drehzahlregelung aufweist, die die Drehzahlvorgabe als Führungsgröße verwenden kann, während sich das Drehmoment des Range-Extenders leicht über den Verbrennungsmotor steuern lässt (z. B. über Luftmenge, Zündwinkel und/oder Einspritzzeitpunkt).According to an advantageous embodiment, the speed specification is used to control the electrical engine of the range extender, while the torque input is used to control the internal combustion engine. This is advantageous because the electrical engine of the range extender typically has a speed control that can use the speed specification as a reference variable, while the torque of the range extender can be easily controlled via the internal combustion engine (eg via air quantity, ignition angle and / or injection timing).
Ein zweiter Aspekt der Erfindung ist auf eine Steuervorrichtung zur Steuerung eines Range-Extenders in einem Elektrofahrzeug gerichtet. Die Steuervorrichtung ist zur Ausführung des vorstehend genannten Verfahrens eingerichtet. Die Merkmale der Steuervorrichtung entsprechen daher den Merkmalen des vorstehend genannten Verfahrens. Dementsprechend ist die Steuervorrichtung eingerichtet, eine Leistungsangabe in Abhängigkeit eines angeforderten Antriebsdrehmomentes zu bestimmen, und den Range-Extenders in Abhängigkeit der Leistungsangabe zu steuern.A second aspect of the invention is directed to a control device for controlling a range extender in an electric vehicle. The control device is set up to carry out the aforementioned method. The features of the control device therefore correspond to the features of the aforementioned method. Accordingly, the control device is set up to determine a power specification as a function of a requested drive torque, and to control the range extender in dependence on the power specification.
Die vorstehenden Ausführungen zum erfindungsgemäßen Verfahren nach dem ersten Aspekt der Erfindung gelten in entsprechender Weise auch für die erfindungsgemäße Steuervorrichtung nach dem zweiten Aspekt der Erfindung.The above statements on the method according to the invention according to the first aspect of the invention also apply correspondingly to the control device according to the invention according to the second aspect of the invention.
Ferner ist die Erfindung auf ein übergeordnetes Steuergerät gerichtet, welches die vorstehende Steuervorrichtung nach dem zweiten Aspekt der Erfindung umfasst. Das Steuergerät dient dabei neben der Steuerung des Range-Extenders auch der Steuerung der ersten elektrischen Maschine, die das Elektrofahrzeug direkt antreibt. Das Steuergerät umfasst Mittel zum Bestimmen oder lediglich zur Entgegennahme eines ersten und eines zweiten Momenten-Signals zur Angabe eines angeforderten Antriebsdrehmoments basierend auf einer Fahrpedal-Stellung. Das erste Momenten-Signal wird in die obige Steuervorrichtung gespeist und das zweite Momenten-Signal dient zur Steuerung der ersten elektrischen Maschine.Furthermore, the invention is directed to a higher-level control device, which comprises the above control device according to the second aspect of the invention. The control unit is used in addition to the control of the range extender and the control of the first electric machine that drives the electric vehicle directly. The control unit comprises means for determining or merely accepting a first and a second torque signal for indicating a requested drive torque based on an accelerator pedal position. The first torque signal is fed to the above control device and the second torque signal is used to control the first electric machine.
Die Erfindung wird nachfolgend unter Zuhilfenahme der beigefügten Zeichnungen anhand mehrerer Ausführungsbeispiele beschrieben. In diesen zeigen:The invention will be described below with reference to the accompanying drawings with reference to several embodiments. In these show:
Ferner ist ein Funktionsblock
Dabei beschreibt die Größe Pbatt laden die geforderte Leistung zur Ladung der Batterie und/oder zur Stützung des Bordnetzes. Die Größe Pbatt max ab gibt die maximale Abgabeleistung des elektrischen Energiespeichers
Die Größen Pbatt max ab und Pbatt max auf basieren vorzugsweise auf einer Voraussschau, beispielsweise auf einer Vorausschau für die nächsten 10 Sekunden.The sizes P batt max ab and P batt max on are preferably based on a lookahead, for example on a preview for the next 10 seconds.
Die Bestimmung der angeforderten Sollleistung Prex des Range-Extenders
Der Range-Extender
Die elektrische Maschine
Vorzugsweise ist es in
Bei der Berechnung der Leistungsanforderung Prex des Range-Extenders
1. Fall(Pwunsch fahrer > Pbatt max ab 1st case (P driver > P batt max
Im unteren Pfad
2. Fall2nd case
Im oberen Pfad
Der Range-Extender
Falls nämlich im 2. Fall die vorstehend genannte Summe (z. B. 19 kW) aus dem Betrag (z. B. 16 kW) der geforderten (negativen) Antriebsleistung Pwunsch fahrer und der Sollleistung Pbatt laden (3 kW) zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzes größer als die maximale Aufnahmeleistung Pbatt max auf (z. B. 10 kW) ist, ergibt sich am Ausgang der Minimum-Operation
Falls die Summe (z. B. 19 kW) größer als die maximale Aufnahmeleistung Pbatt max auf (z. B. 10 kW) ist, wird die Batterie
3. Fall3. Case
Falls die Summe (z. B. 7 kW) aus dem Betrag (z. B. 4 kW) der geforderten (negativen) Antriebsleistung Pwunsch fahrer und der Sollleistung Pbatt laden (3 kW) zur Ladung des elektrischen Energiespeichers und/oder zur Speisung des Bordnetzeshingegen kleiner als die maximale Aufnahmeleistung (z. B. 10 kW) ist, ergibt sich am Ausgang der Minimum-Operation
Im hinteren Teil des Blocks
Aus
Im Extremfall mangelnder Batterieunterstützung (z. B. Notlauf mit defekter Batterie oder leere Batterie) ist die vorstehend beschriebene Ansteuerung in der Lage, den Range-Extender direkt über den Fahrerwunsch anzusteuern und das Fahrzeug als rein seriellen Hybrid ohne elektrischen Zwischenspeicher zu betreiben. Die Beeinflussung über die strategischen Größen wird dann zu Null gesetzt. Sämtliche Größen Pbatt laden, Pbatt max ab und Pbatt max auf können dann auf Null gesetzt werden. Damit ist der Zwischenspeicher wirkungslos.In the extreme case of insufficient battery support (eg emergency operation with defective battery or empty battery), the activation described above is able to control the range extender directly via the driver's request and to operate the vehicle as a purely serial hybrid without an electrical buffer. The influence on the strategic values is then set to zero. All sizes P batt load , P batt max off and P batt max on can then be set to zero. Thus, the cache is ineffective.
Die vorstehend beschriebene technische Lehre erlaubt die Berechnung der elektrischen Leistungsabgabe des Range-Extenders auf der Basis des Fahrerwunschmomentes. Es werden die strategischen Bedarfe der Batterieleistung und Ladung innerhalb der Leistungsbetrachtung des Fahrerwunsches vorzugsweise durch lediglich drei Schnittstellen berücksichtigt. Basis für die Berechnung ist die Leistungsbetrachtung von Fahrerwunsch, Range-Extender und Batterie. Außerdem erlaubt die Erfindung die einfache Einbindung in bekannte Momentenstrukturen für die Längsführung von Fahrzeugen. Dies ermöglicht die Berücksichtigung alle Schnittstellen im Fahrzeug, wie die Vmax-Regelung, Fahrgeschwindigkeitsregelung, Fahrdynamikregelung etc. Die Erfindung erlaubt eine Notlauffähigkeit: auch ohne strategische Vorgabe und ohne Batterie wird immer die richtige Sollleistungsabgabe des Range-Extenders berechnet. Die Berechnung der Leistungsabgabe ermöglicht dabei den Antriebsfall als auch den Verzögerungsfall. Beide Fälle können unter Zuhilfenahme des Range-Extenders gesteuert werden. So werden die Eigenschaften des rein verbrennungsmotorisch betriebenen Fahrzeuges mit den Eigenschaften des rein elektromotorisch betriebenen Fahrzeuges kombiniert.The technical teaching described above allows the calculation of the electric power output of the range extender on the basis of the driver's desired torque. The strategic requirements of the battery power and charge within the performance consideration of the driver's request are preferably taken into account by only three interfaces. Basis for the calculation is the performance consideration of driver request, range extender and battery. In addition, the invention allows easy integration into known torque structures for the longitudinal guidance of vehicles. This allows the consideration of all interfaces in the vehicle, such as the V max control , driving speed control, vehicle dynamics control, etc. The invention allows a Notlauffähigkeit: even without strategic specification and without battery, the correct target output of the range extender is always calculated. The calculation of the power output allows the drive case as well as the deceleration case. Both cases can be controlled with the help of the range extender. Thus, the properties of the purely internal combustion engine operated vehicle are combined with the properties of the purely electric motor-powered vehicle.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
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- EP 0739772 A1 [0005] EP 0739772 A1 [0005]
Claims (14)
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DE102010003000A DE102010003000A1 (en) | 2010-03-18 | 2010-03-18 | Method for controlling range-extender in electric vehicle, involves determining power rating according to required drive torque, where range-extender is controlled according to power rating |
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DE102010003000A DE102010003000A1 (en) | 2010-03-18 | 2010-03-18 | Method for controlling range-extender in electric vehicle, involves determining power rating according to required drive torque, where range-extender is controlled according to power rating |
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