WO2010072449A1 - Method and evaluation device for determining a consumption advantage by an electrical drive on the basis of the determination of a fictitious fuel consumption of a conventional drive - Google Patents

Method and evaluation device for determining a consumption advantage by an electrical drive on the basis of the determination of a fictitious fuel consumption of a conventional drive Download PDF

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Publication number
WO2010072449A1
WO2010072449A1 PCT/EP2009/064200 EP2009064200W WO2010072449A1 WO 2010072449 A1 WO2010072449 A1 WO 2010072449A1 EP 2009064200 W EP2009064200 W EP 2009064200W WO 2010072449 A1 WO2010072449 A1 WO 2010072449A1
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WO
WIPO (PCT)
Prior art keywords
combustion engine
drive
consumption
internal combustion
fuel consumption
Prior art date
Application number
PCT/EP2009/064200
Other languages
German (de)
French (fr)
Inventor
Sandra Sterzing-Oppel
Herbert Prickarz
Original Assignee
Robert Bosch Gmbh
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Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2010072449A1 publication Critical patent/WO2010072449A1/en

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Classifications

    • 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
    • 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
    • B60K6/20—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
    • 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
    • B60K6/48—Parallel type
    • 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
    • B60L2240/421—Speed
    • 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
    • B60L2240/423—Torque
    • 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
    • B60L2240/44—Drive Train control parameters related to combustion engines
    • B60L2240/441—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
    • 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
    • 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
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B60W2050/0028—Mathematical models, e.g. for simulation
    • B60W2050/0031—Mathematical model of the vehicle
    • 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
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/081—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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/083—Torque
    • 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
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • 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
    • B60W2555/00—Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
    • B60W2555/20—Ambient conditions, e.g. wind or rain
    • 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 invention is based on a method or an evaluation device for
  • Advertisements are known from which a total fuel consumption can be removed since resetting a consumption meter. By detecting and dispensing fuel consumption, a driver can thus monitor how economical his driving style is.
  • the inventive method for determining a consumption advantage by an electric drive based on the determination of a fictitious fuel consumption of a conventional drive of a vehicle allows a driver receives feedback on what fuel consumption he by the use of a hybrid vehicle with an internal combustion engine and an additional electric motor saves. Because in the In general, an electrical energy store present for the operation of the electric motor is charged in particular by a feedback of kinetic energy during a braking operation of the vehicle. An additional fuel consumption therefore does not arise in an operation of the electric motor with such drive energy obtained. For information about a
  • Consumption advantage which results from the use of the additional electric drive to be able to provide a driver, is determined according to the invention a fictitious fuel consumption of a conventional drive. From the requested or actual power or the respective moment, a fictitious fuel consumption is determined in the event that an internal combustion engine, such as is present in the vehicle, would deliver the required power or the required torque. From this notional total consumption of a conventional drive, the actual instantaneous fuel consumption of the internal combustion engine is subtracted to obtain a consumption advantage of the electric drive. A consumption advantage can thus be easily determined in order to determine an advantage offered by the additional electric drive and make it accessible to a user.
  • Evaluation device for determining a consumption advantage by an electric drive based on the determination of a fictitious fuel consumption of a conventional drive.
  • Internal combustion engine drive available. Calculated is determined, which fuel quantity would have to be injected at a current speed in order to deliver a required torque. By reading a stored characteristic field, an amount of fuel to be injected can be determined in a simple manner, so that a determination of the fictitious fuel consumption of Internal combustion engine drive is possible with a lower computational cost.
  • Calibration factor for example, an ambient temperature of the vehicle, an aging of the internal combustion engine, or also an additional weight of the electric drive to flow in order to ensure the most accurate result for an indication of the fuel consumption advantage by the additional electric drive.
  • a display device is advantageously provided in a vehicle, in which the fictitious fuel consumption of the electric drive is displayed.
  • the current fuel consumption can advantageously be displayed at a momentary load situation of the vehicle.
  • a related counter can be deleted by a user on request if necessary. For a summation over a long time, for example, it can be determined when any additional costs for the electric drive have paid for themselves.
  • Fuel consumption can be guaranteed.
  • FIG. 1 is a schematic view of a vehicle with an evaluation device according to the invention
  • FIG. 2 shows a method sequence according to the invention for determining the consumption advantage by an electric drive on the basis of
  • a motor vehicle 1 is shown, the drive axle 2 is driven by both an internal combustion engine 3, as well as by an electric motor 4.
  • a drive power is requested via a control element 5 by a driver of the vehicle 1.
  • the operating element 5 is designed, for example, as a foot pedal, a so-called accelerator pedal, in the vehicle interior.
  • Motor control device 6 controls via a data bus 17 both a power of the electric drive 4, as well as the internal combustion engine 3.
  • a power coupling to the drive axle is also controlled in one embodiment by the controlled by the engine control unit 6 gear unit 7.
  • the transmission unit 7 also controls the balance of power with which the electric
  • Drive 4 and the engine 3 access the drive axle 2.
  • the ratio of the maximum power of the electric drive 4 and the internal combustion engine 3 may be different.
  • An evaluation device 8 also accesses the data bus 17. It determines via the data bus 17 both the rotational speed of the electric drive 4 and the rotational speed of the internal combustion engine 3. It can also determine via the data bus 17 which fuel quantity is supplied to the internal combustion engine 3 via a fuel supply line 9.
  • the engine 3 is supplied with fuel such as gasoline, alcohol or diesel via the fuel supply pipe 9.
  • the electric drive 4 is operated via a battery 10, which via a force coupling of the electric drive 4 to the drive axle 2 at a
  • Delay of the vehicle is charged. Furthermore, a charging mode is possible in which a charging of the battery 10 takes place in suitable load conditions of the internal combustion engine 3.
  • the requested torque can also be transmitted from the engine control device 6 to the evaluation device 8 via a data connection 11.
  • the evaluation device 8 can also use the data bus 17 from the electric drive 4 and the internal combustion engine 3 respectively the currently performed moment or in another embodiment, the current
  • the evaluation device 8 For processing the received data, the evaluation device 8 has a computing unit 12. In a memory 13 of the evaluation device 8, a characteristic field is also stored, is assigned in the specific operating conditions of the internal combustion engine 3, a respective fuel consumption.
  • the arithmetic unit 12 now determines the consumption that the user consumes by using the determined power or torque requirement or from the actually present drive power or the currently applied drive torque of both drives 3, 4
  • Combustion engine 3 would need alone under the respective requirements in order to deliver a power or a moment that corresponds to the summed power or the resulting moment of both drives 3, 4. In this way, a fictitious fuel consumption of the internal combustion engine 3 is determined, which would arise if the same requirement, if the engine would be available as the sole drive in the vehicle.
  • the arithmetic unit 12 determines a difference between the fictitious and the actual fuel consumption of the internal combustion engine 3.
  • the resulting difference represents the consumption advantage that allows the use of the electric drive 4. This consumption advantage can thus be determined and represented from the difference between the fictitious and the actual consumption of the internal combustion engine 3.
  • the evaluation device 8 is connected via an interface 15 with a display device 16 in the vehicle.
  • the display device 16 is arranged, for example, in a combination instrument in front of a driver.
  • the current consumption advantage can be displayed.
  • the fuel consumption is preferably spent in liters of fuel saved per 100 km.
  • Amount of fuel output in another unit for example, in indication of a carbon dioxide amount that has been saved by the electric drive 4.
  • the evaluation device 8 may also have a further memory 14, in which a respective notional fuel consumption of the electric drive 4, ie the difference between the actual and the notional consumption of the internal combustion engine, over time and / or distance, is integrated ,
  • a fictitious total consumption of the electric drive can be determined and thus a fuel
  • Total savings to which the electric drive 4 has contributed This total amount can also be displayed in the display device 16.
  • FIG. 2 shows a corresponding method sequence for determining the consumption advantage. From the burden of ancillaries 20 and a respective driver's desired torque 21 results in a strategic operation
  • the fuel consumption that is fictitiously consumed by the internal combustion engine is thus determined. Based on the moment actually requested by the internal combustion engine 30 and including the rotational speed 31, the injected fuel quantity for the internal combustion engine that is actually consumed is also determined by accessing a map 32. Also taking into account a calibration factor 33, a difference 34 between the fictitious and the actual consumption of the internal combustion engine is determined. The result represents the consumption advantage resulting from the use of the electric drive.
  • the consumption advantage can either be output directly in an output 35 or first further processed in a further processing 36, for example integrated, and then likewise output in an output 35.
  • the further processing 36 it is also possible in the further processing 36 to carry out a conversion, for example into emission values. Furthermore, it is also possible to determine an average fuel saving for a traveled distance.
  • the evaluation device has a characteristic curve with an extrapolation range of the injection quantity in order to be able to estimate the fictitious fuel consumption of the internal combustion engine and thus also the consumption advantage by using the electric drive in such a case by extrapolation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a method for determining a consumption advantage by an electrical drive of a vehicle, wherein the vehicle comprises the electrical drive (4) and a combustion engine drive (3) operated by fuel, wherein the fictitious fuel consumption that would be required if the combustion engine was operated alone at the same power or the same torque is determined from the operating parameters of both drives (3, 4) in the case of one having the electrical drive and having the combustion engine drive, and wherein the consumption advantage is determined by the electrical drive from the difference between the fictitious and an actual fuel consumption of the combustion engine drive.

Description

Beschreibung description
Titeltitle
Verfahren und Auswerteeinrichtung zur Bestimmung eines Verbrauchsvorteils durch einen elektrischen Antrieb auf Basis der Bestimmung eines fiktivenMethod and evaluation device for determining a consumption advantage by an electric drive based on the determination of a fictitious
Kraftstoffverbrauchs eines konventionellen AntriebsFuel consumption of a conventional drive
Stand der TechnikState of the art
Die Erfindung geht aus von einem Verfahren oder einer Auswerteeinrichtung zurThe invention is based on a method or an evaluation device for
Bestimmung eines Verbrauchsvorteils durch einen elektrischen Antrieb auf Basis der Bestimmung eines fiktiven Kraftstoffverbrauchs eines konventionellen Antriebs eines Fahrzeugs. Es sind bereits Verbrauchsanzeigen für Kraftfahrzeuge bekannt, aus denen der jeweilige Momentanverbrauch eines Verbrennungsmotors des Kraftfahrzeugs ersichtlich ist. Ferner sind auchDetermining a consumption advantage by an electric drive based on the determination of a fictitious fuel consumption of a conventional drive of a vehicle. Consumption displays for motor vehicles are already known, from which the respective instantaneous consumption of an internal combustion engine of the motor vehicle can be seen. Further, too
Anzeigen bekannt, aus denen ein gesamter Kraftstoffverbrauch seit einer Rücksetzung eines Verbrauchszählers entnehmbar ist. Durch die Ermittlung und die Ausgabe des Kraftstoffverbrauchs kann ein Fahrer somit überwachen, wie wirtschaftlich seine Fahrweise ist.Advertisements are known from which a total fuel consumption can be removed since resetting a consumption meter. By detecting and dispensing fuel consumption, a driver can thus monitor how economical his driving style is.
Offenbarung der ErfindungDisclosure of the invention
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Verfahren zur Bestimmung eines Verbrauchsvorteils durch einen elektrischen Antrieb auf Basis der Bestimmung eines fiktiven Kraftstoffverbrauchs eines konventionellen Antriebs eines Fahrzeugs ermöglicht es demgegenüber, dass ein Fahrer eine Rückmeldung darüber erhält, welchen Kraftstoffverbrauch er durch die Verwendung eines Hybridfahrzeugs mit einem Verbrennungsmotor und einem zusätzlichen Elektromotor einspart. Denn im Allgemeinen wird ein für den Betrieb des Elektromotors vorhandener elektrischer Energiespeicher insbesondere durch eine Rückkopplung von Bewegungsenergie bei einem Bremsvorgang des Fahrzeugs aufgeladen. Ein zusätzlicher Kraftstoffverbrauch entsteht daher bei einem Betrieb des Elektromotors mit derartig gewonnener Antriebsenergie nicht. Um eine Information über einenThe inventive method for determining a consumption advantage by an electric drive based on the determination of a fictitious fuel consumption of a conventional drive of a vehicle, in contrast, allows a driver receives feedback on what fuel consumption he by the use of a hybrid vehicle with an internal combustion engine and an additional electric motor saves. Because in the In general, an electrical energy store present for the operation of the electric motor is charged in particular by a feedback of kinetic energy during a braking operation of the vehicle. An additional fuel consumption therefore does not arise in an operation of the electric motor with such drive energy obtained. For information about a
Verbrauchsvorteil, der sich durch die Verwendung des zusätzlichen elektrischen Antriebs ergibt, einem Fahrer zur Verfügung stellen zu können, wird in erfindungsgemäßer Weise ein fiktiver Kraftstoffverbrauch eines konventionellen Antriebs bestimmt. Aus der angeforderten bzw. tatsächlichen Leistung oder dem jeweiligen Moment wird ein fiktiver Kraftstoffverbrauch für den Fall bestimmt, dass ein Verbrennungsmotor, wie er im Fahrzeug vorhanden ist, die geforderte Leistung bzw. das geforderte Moment liefern würde. Von diesem fiktiven Gesamtverbrauch eines konventionellen Antriebs wird der tatsächliche, momentane Kraftstoffverbrauch des Verbrennungsmotors subtrahiert, um einen Verbrauchsvorteil des elektrischen Antriebs zu erhalten. Ein Verbrauchsvorteil kann somit auf einfache Weise ermittelt werden, um einen Vorteil, den der zusätzliche elektrische Antrieb bietet, zu bestimmen und einem Benutzer zugänglich machen zu können.Consumption advantage, which results from the use of the additional electric drive to be able to provide a driver, is determined according to the invention a fictitious fuel consumption of a conventional drive. From the requested or actual power or the respective moment, a fictitious fuel consumption is determined in the event that an internal combustion engine, such as is present in the vehicle, would deliver the required power or the required torque. From this notional total consumption of a conventional drive, the actual instantaneous fuel consumption of the internal combustion engine is subtracted to obtain a consumption advantage of the electric drive. A consumption advantage can thus be easily determined in order to determine an advantage offered by the additional electric drive and make it accessible to a user.
Entsprechende Vorteile ergeben sich für eine erfindungsgemäßeCorresponding advantages arise for an inventive
Auswerteeinrichtung zur Bestimmung eines Verbrauchsvorteils durch einen elektrischen Antrieb auf Basis der Bestimmung eines fiktiven Kraftstoffverbrauchs eines konventionellen Antriebs.Evaluation device for determining a consumption advantage by an electric drive based on the determination of a fictitious fuel consumption of a conventional drive.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des in dem unabhängigen Anspruch angegebenen Verfahrens und der in dem unabhängigen Anspruch angegebenen Auswerteeinrichtung möglich. So ist vorteilhaft ein Kennlinienfeld für eine einzuspritzende Kraftstoffmenge unter Berücksichtigung des angeforderten Moments und der jeweiligen Drehzahl desThe measures listed in the dependent claims advantageous refinements and improvements of the method specified in the independent claim and the evaluation device specified in the independent claim are possible. So advantageous is a characteristic field for an amount of fuel to be injected, taking into account the requested torque and the respective speed of the
Verbrennungsmotorsantriebs vorhanden. Rechnerisch wird bestimmt, welche Kraftstoffmenge bei einer aktuellen Drehzahl eingespritzt werden müsste, um ein gefordertes Moment liefern zu können. Durch ein Auslesen eines gespeicherten Kennlinienfelds kann eine einzuspritzende Kraftstoffmenge auf einfache Weise bestimmt werden, so dass eine Bestimmung des fiktiven Kraftstoffverbrauchs des Verbrennungsmotorantriebs mit einem geringeren Rechenaufwand ermöglicht wird.Internal combustion engine drive available. Calculated is determined, which fuel quantity would have to be injected at a current speed in order to deliver a required torque. By reading a stored characteristic field, an amount of fuel to be injected can be determined in a simple manner, so that a determination of the fictitious fuel consumption of Internal combustion engine drive is possible with a lower computational cost.
Ferner ist es vorteilhaft, bei der Bestimmung des tatsächlichen und des fiktiven Kraftstoffverbrauchs ggf. einen Kalibrierungsfaktor zu berücksichtigen. In denFurthermore, it may be advantageous to consider a calibration factor when determining the actual and the fictitious fuel consumption. In the
Kalibrierungsfaktor kann beispielsweise eine Umgebungstemperatur des Fahrzeugs, eine Alterung des Verbrennungsmotors, oder auch ein zusätzliches Gewicht des elektrischen Antriebs mit einfließen, um ein möglichst genaues Ergebnis für eine Anzeige des Kraftstoffverbrauchsvorteils durch den zusätzlichen elektrischen Antrieb zu gewährleisten.Calibration factor, for example, an ambient temperature of the vehicle, an aging of the internal combustion engine, or also an additional weight of the electric drive to flow in order to ensure the most accurate result for an indication of the fuel consumption advantage by the additional electric drive.
Vorteilhaft ist in einem Fahrzeug eine Anzeigeeinrichtung vorgesehen, in der der fiktive Kraftstoffverbrauch des elektrischen Antriebs dargestellt wird. Zum einen kann vorteilhaft der aktuelle Kraftstoffverbrauch bei einer momentanen Belastungssituation des Fahrzeugs dargestellt werden. Ferner ist es aber auch vorteilhaft möglich, einen Verbrauchsvorteil integrierend über einen längeren Zeitraum aufzusummieren. Ein diesbezüglicher Zähler kann durch einen Benutzer auf Anforderung ggf. gelöscht werden. Bei einer Aufsummierung über eine längere Zeit kann beispielsweise ermittelt werden, wann sich eventuelle zusätzliche Kosten für den elektrischen Antrieb amortisiert haben. Bei einerA display device is advantageously provided in a vehicle, in which the fictitious fuel consumption of the electric drive is displayed. On the one hand, the current fuel consumption can advantageously be displayed at a momentary load situation of the vehicle. Furthermore, it is also advantageously possible to sum up a consumption advantage integrating over a longer period. A related counter can be deleted by a user on request if necessary. For a summation over a long time, for example, it can be determined when any additional costs for the electric drive have paid for themselves. At a
Aufsummierung eines Verbrauchsvorteils wird negativ auch ein eventueller, geringer jeweiliger Mehrverbrauch berücksichtigt werden, der in einem Ladebetrieb der Batterie durch eine zusätzliche Belastung des Verbrennungsmotorantriebs durch eine Generatorlast entsteht. Hierdurch kann eine realistische Darstellung auch des aufsummierten Vorteils desAdding up a consumption advantage will negatively also take into account a possible, small respective additional consumption that arises in a charging operation of the battery by an additional load on the engine drive by a generator load. This can be a realistic representation of the summed up advantage of
Kraftstoffverbrauchs gewährleistet werden. Fuel consumption can be guaranteed.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigenEmbodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it
Fig. 1 eine schematische Ansicht eines Fahrzeugs mit einer erfindungsgemäßen Auswerteeinrichtung,1 is a schematic view of a vehicle with an evaluation device according to the invention,
Fig. 2 einen erfindungsgemäßen Verfahrensablauf zur Bestimmung des Verbrauchsvorteils durch einen elektrischen Antrieb auf Basis der2 shows a method sequence according to the invention for determining the consumption advantage by an electric drive on the basis of
Bestimmung eines fiktiven Kraftstoffverbrauchs eines konventionellen Antriebs.Determination of a fictitious fuel consumption of a conventional drive.
Ausführungsformen der ErfindungEmbodiments of the invention
In Fig. 1 ist ein Kraftfahrzeug 1 dargestellt, dessen Antriebsachse 2 sowohl von einem Verbrennungsmotor 3, als auch von einem Elektromotor 4 antreibbar ist. Eine Antriebsleistung wird über ein Bedienelement 5 von einem Fahrer des Fahrzeugs 1 angefordert. Das Bedienelement 5 ist beispielsweise als ein Fußpedal, ein sogenanntes Gaspedal, im Fahrzeuginnenraum ausgebildet. EineIn Fig. 1, a motor vehicle 1 is shown, the drive axle 2 is driven by both an internal combustion engine 3, as well as by an electric motor 4. A drive power is requested via a control element 5 by a driver of the vehicle 1. The operating element 5 is designed, for example, as a foot pedal, a so-called accelerator pedal, in the vehicle interior. A
Motorsteuereinrichtung 6 steuert über einen Datenbus 17 sowohl eine Leistung des elektrischen Antriebs 4, als auch des Verbrennungsmotors 3. Eine Leistungskopplung an die Antriebsachse wird in einer Ausführungsform ebenfalls von der von der Motorsteuereinrichtung 6 gesteuerten Getriebeeinheit 7 geregelt. Die Getriebeeinheit 7 regelt ebenfalls das Kräfteverhältnis, mit der der elektrischeMotor control device 6 controls via a data bus 17 both a power of the electric drive 4, as well as the internal combustion engine 3. A power coupling to the drive axle is also controlled in one embodiment by the controlled by the engine control unit 6 gear unit 7. The transmission unit 7 also controls the balance of power with which the electric
Antrieb 4 und der Verbrennungsmotor 3 auf die Antriebsachse 2 zugreifen. Je nach Auslegung der Antriebskomponenten kann das Verhältnis der maximalen Leistung des elektrischen Antriebs 4 und des Verbrennungsmotors 3 unterschiedlich ausfallen.Drive 4 and the engine 3 access the drive axle 2. Depending on the design of the drive components, the ratio of the maximum power of the electric drive 4 and the internal combustion engine 3 may be different.
Auf den Datenbus 17 greift ferner eine Auswerteeinrichtung 8 zu. Sie ermittelt über den Datenbus 17 sowohl die Drehzahl des elektrischen Antriebs 4, als auch die Drehzahl des Verbrennungsmotors 3. Ferner kann sie über den Datenbus 17 ermitteln, welche Kraftstoffmenge dem Verbrennungsmotor 3 über eine Kraftstoffzuführungsleitung 9 zugeführt wird. Der Verbrennungsmotor 3 wird über die Kraftstoffzuführungsleitung 9 mit einem Kraftstoff wie beispielsweise Benzin, Alkohol oder Diesel versorgt. Der elektrische Antrieb 4 wird über eine Batterie 10 betrieben, die über eine Kraftkopplung des elektrischen Antriebs 4 auf die Antriebsachse 2 bei einerAn evaluation device 8 also accesses the data bus 17. It determines via the data bus 17 both the rotational speed of the electric drive 4 and the rotational speed of the internal combustion engine 3. It can also determine via the data bus 17 which fuel quantity is supplied to the internal combustion engine 3 via a fuel supply line 9. The engine 3 is supplied with fuel such as gasoline, alcohol or diesel via the fuel supply pipe 9. The electric drive 4 is operated via a battery 10, which via a force coupling of the electric drive 4 to the drive axle 2 at a
Verzögerung des Fahrzeugs aufgeladen wird. Ferner ist auch eine Ladebetriebsart möglich, bei der in geeigneten Belastungszuständen des Verbrennungsmotors 3 eine Aufladung der Batterie 10 erfolgt.Delay of the vehicle is charged. Furthermore, a charging mode is possible in which a charging of the battery 10 takes place in suitable load conditions of the internal combustion engine 3.
In einer ersten Ausführungsform kann zudem über eine Datenverbindung 11 das angeforderte Drehmoment von der Motorsteuereinrichtung 6 an die Auswerteeinrichtung 8 übermittelt werden. In einer weiteren Ausführungsform kann die Auswerteeinrichtung 8 auch über den Datenbus 17 von dem elektrischen Antrieb 4 sowie dem Verbrennungsmotor 3 jeweils das aktuell geleistete Moment oder in einer anderen Ausführungsform auch die aktuelleIn a first embodiment, the requested torque can also be transmitted from the engine control device 6 to the evaluation device 8 via a data connection 11. In a further embodiment, the evaluation device 8 can also use the data bus 17 from the electric drive 4 and the internal combustion engine 3 respectively the currently performed moment or in another embodiment, the current
Leistung ermitteln. Zur Verarbeitung der empfangenen Daten weist die Auswerteeinrichtung 8 eine Recheneinheit 12 auf. In einem Speicher 13 der Auswerteeinrichtung 8 ist ferner ein Kennlinienfeld abgelegt, in dem bestimmten Betriebsbedingungen des Verbrennungsmotors 3 ein jeweiliger Kraftstoffverbrauch zugeordnet ist.Determine performance. For processing the received data, the evaluation device 8 has a computing unit 12. In a memory 13 of the evaluation device 8, a characteristic field is also stored, is assigned in the specific operating conditions of the internal combustion engine 3, a respective fuel consumption.
In einer ersten Ausführungsform bestimmt nun die Recheneinheit 12 unter Nutzung der ermittelten Leistungs- oder Momentenanforderung bzw. aus der tatsächlich vorliegenden Antriebsleistung bzw. dem aktuell anliegenden Antriebsmoment beider Antriebe 3, 4 denjenigen Verbrauch, den derIn a first embodiment, the arithmetic unit 12 now determines the consumption that the user consumes by using the determined power or torque requirement or from the actually present drive power or the currently applied drive torque of both drives 3, 4
Verbrennungsmotor 3 unter den jeweiligen Anforderungen alleine benötigen würde, um eine Leistung bzw. ein Moment abgeben zu können, das der aufsummierten Leistung bzw. dem resultierenden Moment beider Antriebe 3, 4 entspricht. Hierdurch wird ein fiktiver Kraftstoffverbrauch des Verbrennungsmotors 3 bestimmt, der bei gleicher Anforderung entstehen würde, wenn der Verbrennungsmotor als alleiniger Antrieb im Fahrzeug vorhanden wäre.Combustion engine 3 would need alone under the respective requirements in order to deliver a power or a moment that corresponds to the summed power or the resulting moment of both drives 3, 4. In this way, a fictitious fuel consumption of the internal combustion engine 3 is determined, which would arise if the same requirement, if the engine would be available as the sole drive in the vehicle.
Ferner liegt jedoch auch der tatsächliche Kraftstoffverbrauch des Verbrennungsmotors 3 vor. Die Recheneinheit 12 bestimmt eine Differenz zwischen dem fiktiven und dem tatsächlichen Kraftstoffverbrauch des Verbrennungsmotors 3. Die sich ergebende Differenz stellt den Verbrauchsvorteil dar, den die Verwendung des elektrischen Antriebs 4 ermöglicht. Dieser Verbrauchsvorteil lässt sich somit aus der Differenz zwischen dem fiktiven und dem tatsächlichen Verbrauch des Verbrennungsmotors 3 bestimmen und darstellten.Furthermore, however, the actual fuel consumption of the internal combustion engine 3 is also present. The arithmetic unit 12 determines a difference between the fictitious and the actual fuel consumption of the internal combustion engine 3. The resulting difference represents the consumption advantage that allows the use of the electric drive 4. This consumption advantage can thus be determined and represented from the difference between the fictitious and the actual consumption of the internal combustion engine 3.
Die Auswerteeinrichtung 8 ist über eine Schnittstelle 15 mit einer Anzeigeeinrichtung 16 in dem Fahrzeug verbunden. Die Anzeigeeinrichtung 16 ist beispielsweise in einem Kombinationsinstrument vor einem Fahrer angeordnet. In der Anzeigeeinrichtung kann der aktuelle Verbrauchsvorteil dargestellt werden. Der Kraftstoffverbrauch wird vorzugsweise in eingesparten Litern Kraftstoff pro 100 km ausgegeben.The evaluation device 8 is connected via an interface 15 with a display device 16 in the vehicle. The display device 16 is arranged, for example, in a combination instrument in front of a driver. In the display device, the current consumption advantage can be displayed. The fuel consumption is preferably spent in liters of fuel saved per 100 km.
In einer weiteren Ausführungsform kann statt einer entsprechendenIn a further embodiment, instead of a corresponding
Kraftstoffmenge eine Ausgabe auch in einer anderen Einheit erfolgen, beispielsweise in Angabe einer Kohlendioxidmenge, die durch den elektrischen Antrieb 4 eingespart wurde.Amount of fuel output in another unit, for example, in indication of a carbon dioxide amount that has been saved by the electric drive 4.
In einer weiteren Ausführungsform kann die Auswerteeinrichtung 8 auch über einen weiteren Speicher 14 verfügen, in dem ein jeweiliger fiktiver Kraftstoffverbrauch des elektrischen Antriebs 4, also die Differenz zwischen dem tatsächlichen und dem fiktiven Verbrauch des Verbrennungsmotors, auch über Zeit und/oder Strecke, integriert wird. Somit kann ein fiktiver Gesamtverbrauch des elektrischen Antriebs ermittelt werden und damit eine Kraftstoff-In a further embodiment, the evaluation device 8 may also have a further memory 14, in which a respective notional fuel consumption of the electric drive 4, ie the difference between the actual and the notional consumption of the internal combustion engine, over time and / or distance, is integrated , Thus, a fictitious total consumption of the electric drive can be determined and thus a fuel
Gesamtersparnis, zu der der elektrische Antrieb 4 beigetragen hat. Auch dieser Gesamtbetrag kann in der Anzeigeeinrichtung 16 dargestellt werden.Total savings to which the electric drive 4 has contributed. This total amount can also be displayed in the display device 16.
In der Fig. 2 ist ein entsprechender Verfahrensablauf zur Bestimmung des Verbrauchsvorteils dargestellt. Aus der Belastung durch Nebenaggregate 20 und einem jeweiligen Fahrerwunschmoment 21 ergibt sich eine betriebsstrategischeFIG. 2 shows a corresponding method sequence for determining the consumption advantage. From the burden of ancillaries 20 and a respective driver's desired torque 21 results in a strategic operation
Momentenaufteilung für den Elektroantrieb und für denTorque distribution for the electric drive and for the
Verbrennungsmotorantrieb, d. h. das entsprechende, benötigte AntriebsmomentInternal combustion engine drive, d. H. the corresponding, required drive torque
22 wird aufgeteilt. Eine Aufteilung erfolgt auf das Moment 23, das durch den Verbrennungsmotor bereitgestellt wird und auf das Moment 24, das durch den Elektromotor bereitgestellt wird. In einem Additionsschritt 25 werden diese beiden Momente addiert, so dass ein fiktives, gestelltes Moment 26 für den Verbrennungsmotor bestimmt wird. Unter Einbeziehung der Drehzahl 27 wird ein Kennfeld 28 abgefragt, in dem eine eingespritzte Kraftstoffmenge für diese jeweiligen Momentenanforderungen und Drehzahl bereitgehalten wird. Unter22 is split. A division takes place on the moment 23, which is provided by the internal combustion engine and on the moment 24, by the Electric motor is provided. In an addition step 25, these two moments are added together so that a fictitious set torque 26 is determined for the internal combustion engine. Including the rotational speed 27, a map 28 is queried, in which an injected fuel quantity for these respective torque requirements and speed is kept. Under
Berücksichtigung eines Kalibrierfaktors 29 wird damit derjenige Kraftstoffverbrauch bestimmt, der fiktiv von dem Verbrennungsmotor verbraucht wird. Ausgehend von dem von dem Verbrennungsmotor tatsächlich angeforderten Moment 30 und unter Einbeziehung der Drehzahl 31 wird ebenfalls unter Zugriff auf ein Kennfeld 32 die eingespritzte Kraftstoffmenge für den Verbrennungsmotor bestimmt, die tatsächlich verbraucht wird. Ebenfalls unter Berücksichtung eines Kalibrierfaktors 33 wird eine Differenz 34 zwischen dem fiktiven und dem tatsächlichen Verbrauch des Verbrennungsmotors bestimmt. Das Ergebnis stellt den Verbrauchsvorteil dar, der sich durch die Verwendung des elektrischen Antriebs ergibt. Der Verbrauchsvorteil kann entweder unmittelbar in einer Ausgabe 35 ausgegeben werden oder in einer Weiterverarbeitung 36 zunächst weiterverarbeitet werden, beispielsweise aufintegriert, und anschließend ebenfalls in einer Ausgabe 35 ausgegeben werden.Considering a calibration factor 29, the fuel consumption that is fictitiously consumed by the internal combustion engine is thus determined. Based on the moment actually requested by the internal combustion engine 30 and including the rotational speed 31, the injected fuel quantity for the internal combustion engine that is actually consumed is also determined by accessing a map 32. Also taking into account a calibration factor 33, a difference 34 between the fictitious and the actual consumption of the internal combustion engine is determined. The result represents the consumption advantage resulting from the use of the electric drive. The consumption advantage can either be output directly in an output 35 or first further processed in a further processing 36, for example integrated, and then likewise output in an output 35.
Ferner ist es auch möglich in der Weiterverarbeitung 36 eine Umrechnung, beispielsweise in Emmissionswerte, vorzunehmen. Ferner ist es auch möglich, eine durchschnittliche Kraftstoffersparnis für eine zurückgelegte Fahrstrecke zu bestimmen.Furthermore, it is also possible in the further processing 36 to carry out a conversion, for example into emission values. Furthermore, it is also possible to determine an average fuel saving for a traveled distance.
Ggf. kann nun der Fall auftreten, dass das gesamte geforderte Moment, oder die gesamte geforderte Leistung größer ist als diejenige Leistung, die der Verbrennungsmotor 3 aufgrund seiner Auslegung tatsächlich leisten kann. In diesem Fall verfügt die Auswerteeinrichtung über eine Kennlinie mit einem Extrapolationsbereich der Einspritzmenge, um den fiktiven Kraftstoffverbrauch des Verbrennungsmotors und damit auch den Verbrauchsvorteil durch die Nutzung des elektrischen Antriebs in einem solchen Fall durch eine Extrapolation abschätzen zu können. Possibly. can now occur the case that the total required torque, or the total required power is greater than the power that can actually afford the internal combustion engine 3 due to its design. In this case, the evaluation device has a characteristic curve with an extrapolation range of the injection quantity in order to be able to estimate the fictitious fuel consumption of the internal combustion engine and thus also the consumption advantage by using the electric drive in such a case by extrapolation.

Claims

Ansprüche claims
1. Verfahren zur Bestimmung eines Verbrauchsvorteils durch einen elektrischen Antrieb eines Fahrzeugs, wobei das Fahrzeug über den elektrischen Antrieb (4) und über einen mit Kraftstoff betriebenen Verbrennungsmotorantrieb (3) verfügt, wobei aus den Betriebsparametern der beiden Antriebe (3, 4) bei einem Betrieb des elektrischen Antriebs (4) und des Verbrennungsmotorantriebs (3) derjenige fiktive Kraftstoffverbrauch ermittelt wird, der erforderliche wäre, wenn der Verbrennungsmotorbetrieb mit gleicher Leistung oder mit gleichem Moment alleine betrieben würde, und wobei der Verbrauchsvorteil durch den elektrischen Antrieb (4) aus der Differenz zwischen dem fiktiven und einem tatsächlichen1. A method for determining a fuel consumption advantage by an electric drive of a vehicle, wherein the vehicle via the electric drive (4) and via a fuel-powered engine drive (3), wherein the operating parameters of the two drives (3, 4) at a Operation of the electric drive (4) and the internal combustion engine drive (3) that fictitious fuel consumption is determined, which would be required if the engine operation would be operated with the same power or at the same moment alone, and wherein the consumption advantage by the electric drive (4) from the Difference between the fictitious and an actual
Kraftstoffverbrauch des Verbrennungsmotorantriebs (3) bestimmt wird.Fuel consumption of the internal combustion engine drive (3) is determined.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zur Bestimmung des fiktiven Kraftstoffverbrauchs des Verbrennungsmotorantriebs (3) ein Kennlinienfeld für eine einzuspritzende Kraftstoffmenge unter Berücksichtigung des angeforderten Moments und der Drehzahl des Verbrennungsmotorantriebs ausgewertet wird.2. The method according to claim 1, characterized in that for the determination of the fictitious fuel consumption of the internal combustion engine drive (3) a characteristic field for an amount of fuel to be injected taking into account the requested torque and the speed of the engine drive is evaluated.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der tatsächliche und/oder der fiktive Kraftstoffverbrauch des Verbrennungsmotorantriebs (3) mit einem jeweiligen Kalibrierungsfaktor bei der Bestimmung des Verbrauchsvorteils berücksichtigt werden. 3. The method according to any one of the preceding claims, characterized in that the actual and / or the notional fuel consumption of the internal combustion engine drive (3) are taken into account with a respective calibration factor in the determination of the consumption advantage.
4. Auswerteeinrichtung (8) zur Bestimmung eines Verbrauchsvorteils durch einen elektrischen Antrieb eines Fahrzeugs, das einen elektrischen Antrieb (4) und einen Verbrennungsmotorantrieb (3) aufweist, mit einer Schnittstelle (17) zu einer Steuereinrichtung (6) für beide Antriebe zur Ermittlung einer geforderten oder tatsächlichen Leistung oder eines geforderten oder tatsächlichen Moments beider Antriebe, mit einer Recheneinheit (12) zur Bestimmung eines fiktiven Kraftstoffverbrauchs des Verbrennungsmotorantriebs (3) bei dieser Leistung bzw. bei diesem Moment, mit einer Schnittstelle zur dem4. evaluation device (8) for determining a consumption advantage by an electric drive of a vehicle having an electric drive (4) and an internal combustion engine drive (3), with an interface (17) to a control device (6) for both drives for determining a required or actual power or a required or actual torque of both drives, with a computing unit (12) for determining a fictitious fuel consumption of the engine drive (3) at this power or at that moment, with an interface to the
Verbrennungsmotorantrieb (3) zur Ermittlung eines tatsächlichen Kraftstoffverbrauchs des Verbrennungsmotorantriebs und mit einer Recheneinheit (12) zur Bestimmung eines Verbrauchsvorteils durch den elektrischen Antrieb (4) aus der Differenz des ermittelten fiktiven und des ermittelten tatsächlichen Kraftstoffverbrauchs des VerbrennungsmotorantriebsAn internal combustion engine drive (3) for determining an actual fuel consumption of the internal combustion engine drive and having a computing unit (12) for determining a consumption advantage by the electric drive (4) from the difference between the determined fictitious and the determined actual fuel consumption of the internal combustion engine drive
(3).(3).
5. Auswerteeinrichtung nach Anspruch 4, gekennzeichnet durch eine Schnittstelle zu einer Anzeigeeinrichtung (16) zur Darstellung des Verbrauchsvorteils mittels der Anzeigevorrichtung (16).5. evaluation device according to claim 4, characterized by an interface to a display device (16) for displaying the consumption advantage by means of the display device (16).
6. Auswerteeinrichtung nach einem der Ansprüche 4-5, gekennzeichnet durch einen Speicher (14) zur Speicherung eines kumulierten und/oder durchschnittlichen Verbrauchsvorteils durch den elektrischen Antrieb während einer gesamten vorgegebenen Betriebszeit.6. evaluation device according to any one of claims 4-5, characterized by a memory (14) for storing a cumulative and / or average consumption advantage by the electric drive during a whole predetermined operating time.
7. Auswerteeinrichtung nach einem der Ansprüche 4-6, gekennzeichnet durch einen Speicher (13) zum Ablegen eines Kennlinienfeldes des Verbrennungsmotorantriebs (3) zur Bestimmung des fiktiven Kraftstoffverbrauchs des Verbrennungsmotorantriebs (3). 7. Evaluation device according to one of claims 4-6, characterized by a memory (13) for storing a characteristic field of the internal combustion engine drive (3) for determining the fictitious fuel consumption of the internal combustion engine drive (3).
PCT/EP2009/064200 2008-12-15 2009-10-28 Method and evaluation device for determining a consumption advantage by an electrical drive on the basis of the determination of a fictitious fuel consumption of a conventional drive WO2010072449A1 (en)

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