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WO2011054745A1 - Method for operating a hybrid vehicle - Google Patents

Method for operating a hybrid vehicle Download PDF

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Publication number
WO2011054745A1
WO2011054745A1 PCT/EP2010/066428 EP2010066428W WO2011054745A1 WO 2011054745 A1 WO2011054745 A1 WO 2011054745A1 EP 2010066428 W EP2010066428 W EP 2010066428W WO 2011054745 A1 WO2011054745 A1 WO 2011054745A1
Authority
WO
WIPO (PCT)
Prior art keywords
accelerator pedal
hybrid drive
boost
hybrid
electric machine
Prior art date
Application number
PCT/EP2010/066428
Other languages
German (de)
French (fr)
Inventor
Kai Borntraeger
Original Assignee
Zf Friedrichshafen Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2011054745A1 publication Critical patent/WO2011054745A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • 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
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B60W50/16—Tactile feedback to the driver, e.g. vibration or force feedback to the driver on the steering wheel or the accelerator pedal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B60W20/19—Control strategies specially adapted for achieving a particular effect for achieving enhanced acceleration
    • 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
    • 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 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 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
    • 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
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
    • 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
    • B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
    • B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
    • B60K26/021—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements with means for providing feel, e.g. by changing pedal force characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • 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
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B60W2050/143—Alarm means
    • 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
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • 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
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B60W2540/103—Accelerator thresholds, e.g. kickdown
    • 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
    • B60W2540/12—Brake pedal position
    • 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

Definitions

  • the invention relates to a method for operating a hybrid vehicle according to the preamble of claim 1.
  • the main components of a drive train of a motor vehicle are a drive unit and a transmission, wherein the transmission of the drive train is connected between the drive unit and an output.
  • the transmission converts speeds and torques and thus provides the tractive power of the drive unit at the output of the drive train ready.
  • the present invention relates to a method for operating a hybrid vehicle, which comprises a hybrid drive as drive unit.
  • a hybrid drive of a drive train of a hybrid vehicle has at least two sub-drive units, namely a first sub-drive unit, which is designed in particular as an internal combustion engine, and a second sub-drive unit, which is designed in particular as an electric machine.
  • An electric machine of a hybrid drive can be operated as a generator or motor to charge an electrical energy storage of the hybrid drive in regenerative operation by converting kinetic energy into electrical energy or to provide drive power in motor operation by converting electrical energy into kinetic energy.
  • a control device determines an operating strategy for the hybrid drive, namely the sub-drive units thereof, so as to operate the hybrid vehicle consumption optimized.
  • a sporty driving style is hereby only partially possible.
  • a method for controlling the torque of a hybrid vehicle which is provided that in the presence of a desired torque that is greater than a currently provided total drive torque of the drive unit of the hybrid vehicle, the internal combustion engine torque in a initial boost phase, a dynamic, positive, electromotive torque is impressed, which passes through a maximum during the boost phase and in a second phase for a predeterminable duration a specifiable, substantially constant, positive or negative electromotive torque is impressed the internal combustion engine torque, so that the resulting total drive torque at least approximately corresponds to the desired torque, wherein sign and height of the electromotive torque can be specified as a function of the desired moment.
  • a method for controlling a hybrid vehicle in which the pedal travel of the accelerator pedal of the hybrid vehicle is divided into a first and in a second areas, wherein the first area only controls the engine from idle to full load and the electric machine runs without driving and the second area controls only the electric machine, wherein the engine is constantly operated at full load.
  • the present invention is based on the object to provide a method for operating a hybrid vehicle in safe Boost ost strict strict strict stricture.
  • the hybrid vehicle in this case comprises a hybrid drive with an internal combustion engine and an electric machine, a cooperating with the electric machine electrical energy storage, a switched between the hybrid drive and an output gear, an accelerator pedal and a brake pedal.
  • This object is achieved by a method according to claim 1 and by a method according to claim 2.
  • a boost operation of the hybrid drive depending on the operation of the accelerator pedal of the hybrid drive driving performance requested and provided at the transmission input, and activated and / or deactivated depending on the operation of the accelerator pedal by a driver, a boost operation of the hybrid drive.
  • the internal combustion engine and the electric machine for driving performance increase provide driving performance.
  • the boost operation of the hybrid drive is activated when the operation of the accelerator pedal from a relatively little actuated accelerator pedal reaches a limit, and the activation of the boost operation is prevented when a charge limit of the electrical energy storage is exceeded.
  • the boost operation of the hybrid drive is deactivated when the operation of the accelerator pedal, starting from a relatively heavily actuated accelerator pedal reaches a limit, and the boost mode is deactivated before reaching the limit, when a charge limit of the electrical energy storage is exceeded.
  • Boost boost function
  • the boost function is activated and / or deactivated depending on the actuation of the accelerator pedal as well as on the state of charge of the electrical energy accumulator.
  • Boost provide all sub-propulsion units of the hybrid drive driving performance at sufficiently high state of charge, so as to increase the driving performance and to allow a sporty operation of the hybrid vehicle.
  • 1 is a schematic representation of a drive train of a
  • Hybrid vehicle to illustrate the method according to the invention.
  • Fig. 1 shows a highly schematic example of a drive train of a hybrid vehicle, in which the inventive method can be used.
  • the drive train of a hybrid vehicle shown in Fig. 1 has a drive unit 1 of two sub-drive units, namely a first designed as an internal combustion engine 2 sub-drive unit and a second designed as an electric machine 3 sub-drive unit, wherein between the hybrid drive 1 and an output 4 of the hybrid vehicle, a transmission 5 is switched.
  • the transmission 5 is preferably an automatic or automated transmission, in particular an automated or automatic transmission.
  • the drive unit 1 acts a motor control device 6 and the transmission 5, a transmission control device 7 together.
  • the engine control device 6 exchanges data with both partial drive units 2, 3 as well as with the transmission control device 7.
  • the transmission control device 7 exchanges data with the transmission 5.
  • the hybrid vehicle further has an accelerator pedal 8 and a brake pedal, not shown, wherein the accelerator pedal 8 is also referred to as an accelerator pedal.
  • the accelerator pedal 8 is also referred to as an accelerator pedal.
  • the operation of the accelerator pedal 8 and / or the Operation of the brake pedal is required by the hybrid drive 1 driving performance and provided at the transmission input of the transmission 5.
  • boost mode of the hybrid drive 1 be activated and / or deactivated.
  • both the first sub-drive unit designed as an internal combustion engine 2 and the second sub-drive unit of the hybrid drive 1 designed as an electric machine 3 provide driver power so as to ensure an increase in driving performance.
  • the boost operation of the hybrid drive 1 is activated in particular when the actuation of the accelerator pedal 8, starting from a relatively little actuated accelerator pedal 8 reaches or exceeds a limit.
  • Fig. 1 for the accelerator pedal 8 schematically two actuation areas 9 and 10 are shown.
  • the actuation region 9 corresponds to a relatively little actuated accelerator pedal 8 and the actuation region 10 corresponds to a relatively strongly actuated accelerator pedal.
  • the two operating areas 9 and 10 are separated from each other by the limit value 1 1, wherein when starting from the operating area 9 for the accelerator pedal 8, the limit value 1 1 is reached or exceeded, the boost operation of the hybrid drive is activated on the driver side.
  • the boost mode for the hybrid drive 1 is activated, wherein the degree of boost operation is preferably determined as a function of the actuation of the accelerator pedal 8 in the actuation area 10.
  • the degree of boost operation is preferably determined as a function of the actuation of the accelerator pedal 8 in the actuation area 10.
  • the boost mode depends on a detected driving situation of the hybrid vehicle and / or depending on a detected state of the hybrid vehicle Hybrid drive 1 limited or disabled is prevented.
  • the boost operation of the hybrid drive is deactivated when the actuation of the accelerator pedal 8, starting from a relatively strongly actuated accelerator pedal, ie starting from the actuation region 10 thereof, reaches the limit value 1 1 or falls below.
  • a driver-side deactivation or termination of the boost operation is possible.
  • the accelerator pedal 8 for the operation of a hybrid vehicle to activate a boost mode for driving performance increase and / or disable.
  • the activation of the boost function takes place exclusively on the driver side, the deactivation of the boost operation can be on the driver side or on the system side be specified. Likewise, the boost mode can be limited or prevented on the system side.
  • the driver-side activation of the boost operation takes place when the actuation of the accelerator pedal 8 reaches or exceeds a limit value.
  • this activation of the boost function can be prevented, in particular if a state of charge of an electrical energy store, which interacts with the electric machine 3 of the hybrid drive, is too low, and / or if load limits in Gear 5 are exceeded by the boost mode.
  • the driver-side termination of the boost operation takes place when the accelerator pedal 8 is relieved and reaches the limit again or falls below.
  • the termination of the boost operation takes place, for example, when a charge limit of the electrical energy store is exceeded and / or if it requires the driving situation of the hybrid vehicle.
  • the boost operation when in a request for a boost operation by the driver by corresponding operation of the accelerator pedal 8, the boost operation is prevented and / or terminated and / or limited, for the driver on the accelerator pedal 8, a corresponding feedback or Reaction generated.
  • an actuator 12 cooperate, which then when the boost mode is terminated or deactivated and / or prevented and / or limited, the accelerator pedal 8 applies a force that counteracts the operation of the accelerator pedal 8 made by the driver. The driver therefore feels at his foot, with which the accelerator pedal 8 is pressed, whether the boost function is fully allowed or not.

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

Abstract

The invention relates to a method for operating a hybrid vehicle comprising a hybrid drive (1) having a first partial drive assembly (2), in particular an internal combustion engine, and a second partial drive assembly (3), in particular an electrical machine, a transmission (5) connected between the hybrid drive (1) and an output (4), an accelerator pedal (8) and a brake pedal, wherein driving performance is demanded by the hybrid drive (1) as a function of the actuation of the accelerator pedal (8) and is provided at the transmission input. According to the invention, a boost mode of the hybrid drive (1) is activated and deactivated as a function of the actuation of the accelerator pedal (8) by a driver and as a function of the electrical energy store, wherein the first partial drive assembly (2) and the second partial drive assembly (3) of the hybrid drive (1) provide driving performance for increasing driving performance in the boost mode.

Description

Verfahren zum Betreiben eines Hvbridfahrzeuqs  Method for operating a hybrid vehicle
Die Erfindung betrifft ein Verfahren zum Betreiben eines Hybridfahrzeugs nach dem Oberbegriff des Anspruchs 1 . The invention relates to a method for operating a hybrid vehicle according to the preamble of claim 1.
Die Hauptkomponenten eines Antriebsstrangs eines Kraftfahrzeugs sind ein Antriebsaggregat und ein Getriebe, wobei das Getriebe des Antriebsstrangs zwischen das Antriebsaggregat und einen Abtrieb geschaltet ist. Das Getriebe wandelt Drehzahlen und Drehmomente und stellt so das Zugkraftangebot des Antriebsaggregats am Abtrieb des Antriebsstrangs bereit. Die hier vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines Hybridfahrzeugs, welches als Antriebsaggregat einen Hybridantrieb umfasst. The main components of a drive train of a motor vehicle are a drive unit and a transmission, wherein the transmission of the drive train is connected between the drive unit and an output. The transmission converts speeds and torques and thus provides the tractive power of the drive unit at the output of the drive train ready. The present invention relates to a method for operating a hybrid vehicle, which comprises a hybrid drive as drive unit.
Ein Hybridantrieb eines Antriebsstrangs eines Hybridfahrzeugs verfügt über mindestens zwei Teilantriebsaggregate, nämlich ein erstes Teilantriebsaggregat, welches insbesondere als Verbrennungsmotor ausgebildet ist, und ein zweites Teilantriebsaggregat, welches insbesondere als elektrische Maschine ausgeführt ist. Eine elektrische Maschine eines Hybridantriebs kann dabei generatorisch oder motorisch betrieben werden, um im generatorischen Betrieb durch Wandlung kinetischer Energie in elektrische Energie einen elektrischen Energiespeicher des Hybridantriebs zu laden oder um im motorischen Betrieb durch Wandlung von elektrischer Energie in kinetische Energie Antriebsleistung bereitzustellen. A hybrid drive of a drive train of a hybrid vehicle has at least two sub-drive units, namely a first sub-drive unit, which is designed in particular as an internal combustion engine, and a second sub-drive unit, which is designed in particular as an electric machine. An electric machine of a hybrid drive can be operated as a generator or motor to charge an electrical energy storage of the hybrid drive in regenerative operation by converting kinetic energy into electrical energy or to provide drive power in motor operation by converting electrical energy into kinetic energy.
Abhängig von einer Betätigung eines Fahrpedals und/oder abhängig von einer Betätigung eines Bremspedals und/oder abhängig von einer detektierten Fahrsituation bestimmt eine Steuerungseinrichtung eine Betriebsstrategie für den Hybridantrieb, nämlich die Teilantriebsaggregate desselben, um so das Hybridfahrzeug verbrauchsoptimiert zu betreiben. Eine sportliche Fahrweise ist hiermit in der Regel nur eingeschränkt möglich. In der DE102005047940A1 ist ein Verfahren zur Momentensteuerung eines Hybridfahrzeugs angegeben, bei welchen vorgesehen ist, dass bei Vorliegen eines Wunschmomentes, das größer ist als ein aktuell bereitgestelltes Gesamtantriebsmoment der Antriebseinheit des Hybridfahrzeugs, in einer anfänglichen Boostphase dem verbrennungsmotorischen Moment ein dynamisches, positives, elektromotorisches Moment aufgeprägt wird, das während der Boostphase ein Maximum durchläuft und in einer zweiten Phase für eine vorgebbare Dauer ein vorgebbares, im Wesentlichen konstantes, positives oder negatives elektromotorisches Moment dem verbrennungsmotorischen Moment aufgeprägt wird, so dass das resultierende Gesamtantriebsmoment zumindest annähernd dem Wunschmoment entspricht, wobei Vorzeichen und Höhe des elektromotorischen Moments in Abhängigkeit von dem Wunschmoment vorgegeben werden. Depending on an actuation of an accelerator pedal and / or depending on an actuation of a brake pedal and / or depending on a detected driving situation, a control device determines an operating strategy for the hybrid drive, namely the sub-drive units thereof, so as to operate the hybrid vehicle consumption optimized. A sporty driving style is hereby only partially possible. In DE102005047940A1 a method for controlling the torque of a hybrid vehicle is provided, which is provided that in the presence of a desired torque that is greater than a currently provided total drive torque of the drive unit of the hybrid vehicle, the internal combustion engine torque in a initial boost phase, a dynamic, positive, electromotive torque is impressed, which passes through a maximum during the boost phase and in a second phase for a predeterminable duration a specifiable, substantially constant, positive or negative electromotive torque is impressed the internal combustion engine torque, so that the resulting total drive torque at least approximately corresponds to the desired torque, wherein sign and height of the electromotive torque can be specified as a function of the desired moment.
In der DE29824319U1 ist ein Verfahren zur Steuerung eines Hybridfahrzeugs angegeben, bei welchem der Pedalweg des Gaspedals des Hybridfahrzeugs in einen ersten und in einen zweiten Bereiche aufgeteilt ist, wobei der erste Bereich nur den Verbrennungsmotor von Leerlauf bis Volllast steuert und die elektrische Maschine ohne anzutreiben mitläuft und der zweite Bereich nur die elektrische Maschine steuert, wobei der Verbrennungsmotor konstant auf Volllast betrieben wird. In DE29824319U1 a method for controlling a hybrid vehicle is specified, in which the pedal travel of the accelerator pedal of the hybrid vehicle is divided into a first and in a second areas, wherein the first area only controls the engine from idle to full load and the electric machine runs without driving and the second area controls only the electric machine, wherein the engine is constantly operated at full load.
Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zu Grunde, ein Verfahren zum Betreiben eines Hybridfahrzeugs im sicheren Bo- ostbetrieb zu schaffen. Das Hybridfahrzeug umfasst hierbei einen Hybridantrieb mit einem Verbrennungsmotor und einer elektrischen Maschine, einem mit der elektrischen Maschine zusammenwirkenden elektrischen Energiespeicher, einen zwischen den Hybridantrieb und einen Abtrieb geschaltetes Getriebe, ein Fahrpedal und ein Bremspedal. Diese Aufgabe wird durch ein Verfahren gemäß Anspruch 1 sowie durch ein Verfahren nach Anspruch 2 gelöst. On this basis, the present invention is based on the object to provide a method for operating a hybrid vehicle in safe Boost ostbetrieb. The hybrid vehicle in this case comprises a hybrid drive with an internal combustion engine and an electric machine, a cooperating with the electric machine electrical energy storage, a switched between the hybrid drive and an output gear, an accelerator pedal and a brake pedal. This object is achieved by a method according to claim 1 and by a method according to claim 2.
Bei den Verfahren wird abhängig von der Betätigung des Fahrpedals vom Hybridantrieb Fahrleistung angefordert und am Getriebeeingang bereitgestellt, und abhängig von der Betätigung des Fahrpedals durch einen Fahrer ein Boostbetrieb des Hybridantriebs aktiviert und/oder deaktiviert. Hierbei stellen im Boostbetrieb der Verbrennungsmotor und die elektrische Maschine zur Fahrleistungssteigerung Fahrleistung bereit. In the method, depending on the operation of the accelerator pedal of the hybrid drive driving performance requested and provided at the transmission input, and activated and / or deactivated depending on the operation of the accelerator pedal by a driver, a boost operation of the hybrid drive. Here, in the boost mode, the internal combustion engine and the electric machine for driving performance increase provide driving performance.
Nach einem Aspekt der Erfindung wird der Boostbetrieb des Hybridantriebs dann aktiviert, wenn die Betätigung des Fahrpedals ausgehend von einem relativ wenig betätigten Fahrpedal einen Grenzwert erreicht, und die Aktivierung des Boostbetriebs verhindert wird, wenn eine Ladungsgrenze des elektrischen Energiespeichers unterschritten ist. According to one aspect of the invention, the boost operation of the hybrid drive is activated when the operation of the accelerator pedal from a relatively little actuated accelerator pedal reaches a limit, and the activation of the boost operation is prevented when a charge limit of the electrical energy storage is exceeded.
Nach einem anderen Aspekt der Erfindung wird der Boostbetrieb des Hybridantriebs dann deaktiviert, wenn die Betätigung des Fahrpedals ausgehend von einem relativ stark betätigten Fahrpedal einen Grenzwert erreicht, und der Boostbetrieb vor Erreichen des Grenzwertes deaktiviert wird, wenn eine Ladungsgrenze des elektrischen Energiespeichers unterschritten wird. According to another aspect of the invention, the boost operation of the hybrid drive is deactivated when the operation of the accelerator pedal, starting from a relatively heavily actuated accelerator pedal reaches a limit, and the boost mode is deactivated before reaching the limit, when a charge limit of the electrical energy storage is exceeded.
Mit der hier vorliegenden Erfindung wird vorgeschlagen, zum Betreiben eines Hybridantriebs eine sichere Boostfunktion bereitzustellen, wobei die Bo- ostfunktion abhängig von der Betätigung des Fahrpedals sowie abhängig vom Ladezustand des elektrischen Energiespeichers aktiviert und/oder deaktiviert wird. Im Boostbetrieb stellen bei hinreichend hohem Ladezustand sämtliche Teilantriebsaggregate des Hybridantriebs Fahrleistung bereit, um so die Fahrleistung zu steigern und einen sportlichen Betrieb des Hybridfahrzeugs zu ermöglichen. Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt: With the present invention, it is proposed to provide a safe boost function for operating a hybrid drive, wherein the boost function is activated and / or deactivated depending on the actuation of the accelerator pedal as well as on the state of charge of the electrical energy accumulator. In Boostbetrieb provide all sub-propulsion units of the hybrid drive driving performance at sufficiently high state of charge, so as to increase the driving performance and to allow a sporty operation of the hybrid vehicle. Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
Fig. 1 eine schematisierte Darstellung eines Antriebsstrangs eines 1 is a schematic representation of a drive train of a
Hybridfahrzeugs zur Verdeutlichung des erfindungsgemäßen Verfahrens.  Hybrid vehicle to illustrate the method according to the invention.
Die hier vorliegende Erfindung betrifft ein Verfahren zum Betreiben eines Hybridfahrzeugs. Fig. 1 zeigt stark schematisiert ein exemplarisches Beispiel eines Antriebsstrangs eines Hybridfahrzeugs, bei welchem das erfindungsgemäße Verfahren zum Einsatz kommen kann. The present invention relates to a method for operating a hybrid vehicle. Fig. 1 shows a highly schematic example of a drive train of a hybrid vehicle, in which the inventive method can be used.
So verfügt der in Fig. 1 gezeigte Antriebsstrang eines Hybridfahrzeugs über ein Antriebsaggregat 1 aus zwei Teilantriebsaggregaten, nämlich einen ersten als Verbrennungsmotor 2 ausgebildeten Teilantriebsaggregat und einen zweiten als elektrische Maschine 3 ausgebildeten Teilantriebsaggregat, wobei zwischen den Hybridantrieb 1 und einen Abtrieb 4 des Hybridfahrzeugs ein Getriebe 5 geschaltet ist. Beim Getriebe 5 handelt es sich vorzugsweise um ein automatisches bzw. automatisiertes Getriebe, insbesondere um ein automatisiertes bzw. automatisches Schaltgetriebe.  Thus, the drive train of a hybrid vehicle shown in Fig. 1 has a drive unit 1 of two sub-drive units, namely a first designed as an internal combustion engine 2 sub-drive unit and a second designed as an electric machine 3 sub-drive unit, wherein between the hybrid drive 1 and an output 4 of the hybrid vehicle, a transmission 5 is switched. The transmission 5 is preferably an automatic or automated transmission, in particular an automated or automatic transmission.
Mit dem Antriebsaggregat 1 wirkt eine Motorsteuerungseinrichtung 6 und mit dem Getriebe 5 eine Getriebesteuerungseinrichtung 7 zusammen. Die Motorsteuerungseinrichtung 6 tauscht mit beiden Teilantriebsaggregaten 2, 3 sowie mit der Getriebesteuerungseinrichtung 7 Daten aus. Ebenso tauscht die Getriebesteuerungseinrichtung 7 mit dem Getriebe 5 Daten aus. With the drive unit 1 acts a motor control device 6 and the transmission 5, a transmission control device 7 together. The engine control device 6 exchanges data with both partial drive units 2, 3 as well as with the transmission control device 7. Likewise, the transmission control device 7 exchanges data with the transmission 5.
Das Hybridfahrzeug verfügt weiterhin über ein Fahrpedal 8 sowie ein nicht gezeigtes Bremspedal, wobei das Fahrpedal 8 auch als Gaspedal bezeichnet wird. Abhängig von der Betätigung des Fahrpedals 8 und/oder der Betätigung des Bremspedals wird vom Hybridantrieb 1 Fahrleistung angefordert und am Getriebeeingang des Getriebes 5 bereitgestellt. The hybrid vehicle further has an accelerator pedal 8 and a brake pedal, not shown, wherein the accelerator pedal 8 is also referred to as an accelerator pedal. Depending on the operation of the accelerator pedal 8 and / or the Operation of the brake pedal is required by the hybrid drive 1 driving performance and provided at the transmission input of the transmission 5.
Im Sinne des erfindungsgemäßen Verfahrens wird vorgeschlagen, dass abhängig von der Betätigung des Fahrpedals 8 durch einen Fahrer ein Boostbetrieb des Hybridantriebs 1 aktiviert und/oder deaktiviert wird. Im Boostbetrieb stellen sowohl das als Verbrennungsmotor 2 ausgebildete erste Teilantriebsaggregat als auch das als elektrische Maschine 3 ausgebildet zweite Teilantriebsaggregat des Hybridantriebs 1 Fahrerleistung bereit, um so eine Fahrleistungssteigerung zu gewährleisten. In terms of the method according to the invention, it is proposed that, depending on the actuation of the accelerator pedal 8 by a driver, a boost mode of the hybrid drive 1 be activated and / or deactivated. In boost mode, both the first sub-drive unit designed as an internal combustion engine 2 and the second sub-drive unit of the hybrid drive 1 designed as an electric machine 3 provide driver power so as to ensure an increase in driving performance.
Der Boostbetrieb des Hybridantriebs 1 wird insbesondere dann aktiviert, wenn die Betätigung des Fahrpedals 8 ausgehend von einem relativ wenig betätigten Fahrpedal 8 einen Grenzwert erreicht bzw. überschreitet. So sind in Fig. 1 für das Fahrpedal 8 schematisiert zwei Betätigungsbereiche 9 und 10 gezeigt. Der Betätigungsbereich 9 entspricht einem relativ wenig betätigten Fahrpedal 8 und der Betätigungsbereich 10 einem relativ stark betätigten Fahrpedal. Die beiden Betätigungsbereiche 9 und 10 sind durch den Grenzwert 1 1 voneinander getrennt, wobei dann, wenn ausgehend vom Betätigungsbereich 9 für das Fahrpedal 8 der Grenzwert 1 1 erreicht bzw. überschritten wird, der Boostbetrieb des Hybridantriebs fahrerseitig aktiviert wird. The boost operation of the hybrid drive 1 is activated in particular when the actuation of the accelerator pedal 8, starting from a relatively little actuated accelerator pedal 8 reaches or exceeds a limit. Thus, in Fig. 1 for the accelerator pedal 8 schematically two actuation areas 9 and 10 are shown. The actuation region 9 corresponds to a relatively little actuated accelerator pedal 8 and the actuation region 10 corresponds to a relatively strongly actuated accelerator pedal. The two operating areas 9 and 10 are separated from each other by the limit value 1 1, wherein when starting from the operating area 9 for the accelerator pedal 8, the limit value 1 1 is reached or exceeded, the boost operation of the hybrid drive is activated on the driver side.
Mit Erreichen sowie Überschreiten des Grenzwerts 1 1 und demnach Ü- berführen des Fahrpedals 8 in den Betätigungsbereich 10 wird der Boostbetrieb für den Hybridantrieb 1 aktiviert, wobei der Grad des Boostbetriebs vorzugsweise abhängig von der Betätigung des Fahrpedals 8 im Betätigungsbereich 10 bestimmt wird. Je weiter demnach das Fahrpedal 8 im Betätigungsbereich 10 durchgedrückt wird, desto stärker wird der Boostbetrieb gewählt, desto mehr Fahrleistung wird demnach vom Hybridantrieb 1 bereitgestellt. Nach einer vorteilhaften Weiterbildung der Erfindung ist vorgesehen, dass dann, wenn das Fahrpedal 8 im Betätigungsbereich 10 betätigt wird und demnach der Boostbetrieb für den Hybridantrieb 1 aktiviert ist, der Boostbetrieb abhängig von einer detektierten Fahrsituation des Hybridfahrzeugs und/oder abhängig von einem detektierten Zustand des Hybridantriebs 1 limitiert oder deaktiviert verhindert wird. Upon reaching and exceeding the limit value 1 1 and, accordingly, transfer of the accelerator pedal 8 into the actuation area 10, the boost mode for the hybrid drive 1 is activated, wherein the degree of boost operation is preferably determined as a function of the actuation of the accelerator pedal 8 in the actuation area 10. The further, accordingly, the accelerator pedal 8 is pressed in the operating region 10, the stronger the boost mode is selected, the more driving power is thus provided by the hybrid drive 1. According to an advantageous development of the invention, it is provided that when the accelerator pedal 8 is actuated in the actuation area 10 and therefore the boost mode for the hybrid drive 1 is activated, the boost mode depends on a detected driving situation of the hybrid vehicle and / or depending on a detected state of the hybrid vehicle Hybrid drive 1 limited or disabled is prevented.
Ferner ist es möglich, dass dann, wenn der Grenzwert 1 1 für die Betätigung des Fahrpedals 8 überschritten wird, jedoch ein elektrischer Energiespeicher des Hybridantriebs 1 , welcher mit der elektrischen Maschine 3 zusammenwirkt, zu stark entladen ist, d.h. eine Ladungsgrenze des elektrischen E- nergiespeichers unterschritten ist, trotz Erreichen bzw. Überschreiten des Grenzwerts 1 1 der Boostbetrieb verhindert wird. Further, it is possible that when the limit value 1 1 for the operation of the accelerator pedal 8 is exceeded, however, an electrical energy storage of the hybrid drive 1, which cooperates with the electric machine 3, is discharged too much, i. has fallen below a charge limit of the electrical energy storage, in spite of reaching or exceeding the limit value of 1 1, the boost operation is prevented.
Ebenso ist es möglich, dass dann, wenn sich während eines Boostbe- triebs der elektrische Energiespeicher des Hybridantriebs 1 zu stark entlädt, der Boostbetrieb trotz Betätigung des Fahrpedals 8 im Betätigungsbereich 10 beendet wird. It is also possible that, when the electric energy storage of the hybrid drive 1 discharges too much during a boost operation, the boost operation is terminated despite operation of the accelerator pedal 8 in the actuation region 10.
Zusätzlich zu dieser systemseitigen Beendigung bzw. Deaktivierung des Boostbetriebs ist es möglich, dass der Boostbetrieb des Hybridantriebs dann deaktiviert wird, wenn die Betätigung des Fahrpedals 8 ausgehend von einem relativ stark betätigten Fahrpedal, also ausgehend vom Betätigungsbereich 10 desselben, den Grenzwert 1 1 erreicht bzw. unterschreitet. Hierdurch ist dann eine fahrerseitige Deaktivierung bzw. Beendigung des Boostbetriebs möglich. In addition to this system-side termination or deactivation of the boost operation, it is possible for the boost operation of the hybrid drive to be deactivated when the actuation of the accelerator pedal 8, starting from a relatively strongly actuated accelerator pedal, ie starting from the actuation region 10 thereof, reaches the limit value 1 1 or falls below. As a result, then a driver-side deactivation or termination of the boost operation is possible.
Es liegt demnach im Sinne der hier vorliegenden Erfindung, abhängig von der Betätigung des Fahrpedals 8 für den Betrieb eines Hybridfahrzeugs einen Boostbetrieb zur Fahrleistungssteigerung zu aktivieren und/oder zu deaktivieren. Das Aktivieren der Boostfunktion erfolgt dabei ausschließlich fahrersei- tig, die Deaktivierung des Boostbetriebs kann fahrerseitig oder systemseitig vorgegeben werden. Ebenso kann der Boostbetrieb systemseitig begrenzt oder verhindert werden. It is therefore within the meaning of the present invention, depending on the operation of the accelerator pedal 8 for the operation of a hybrid vehicle to activate a boost mode for driving performance increase and / or disable. The activation of the boost function takes place exclusively on the driver side, the deactivation of the boost operation can be on the driver side or on the system side be specified. Likewise, the boost mode can be limited or prevented on the system side.
Die fahrerseitige Aktivierung des Boostbetriebs erfolgt dann, wenn die Betätigung des Fahrpedals 8 einen Grenzwert erreicht bzw. überschreitet. Abhängig von der Fahrsituation und/oder dem Zustand des Hybridantriebs kann jedoch diese Aktivierung der Boostfunktion verhindert werden, insbesondere dann, wenn ein Ladezustand eines elektrischen Energiespeichers, der mit der elektrischen Maschine 3 des Hybridantriebs zusammenwirkt, zu gering ist, und/oder wenn Belastungsgrenzen im Getriebe 5 durch den Boostbetrieb überschritten werden. The driver-side activation of the boost operation takes place when the actuation of the accelerator pedal 8 reaches or exceeds a limit value. Depending on the driving situation and / or the state of the hybrid drive, however, this activation of the boost function can be prevented, in particular if a state of charge of an electrical energy store, which interacts with the electric machine 3 of the hybrid drive, is too low, and / or if load limits in Gear 5 are exceeded by the boost mode.
Die fahrerseitige Beendigung des Boostbetriebs erfolgt dann, wenn das Fahrpedal 8 entlastet wird und den Grenzwert wieder erreicht bzw. unterschreitet. Systemseitig erfolgt die Beendigung des Boostbetriebs zum Beispiel dann, wenn eine Ladungsgrenze des elektrischen Energiespeichers unterschritten wird und/oder wenn es die Fahrsituation des Hybridfahrzeugs erfordert. The driver-side termination of the boost operation takes place when the accelerator pedal 8 is relieved and reaches the limit again or falls below. On the system side, the termination of the boost operation takes place, for example, when a charge limit of the electrical energy store is exceeded and / or if it requires the driving situation of the hybrid vehicle.
Nach einer vorteilhaften Weiterbildung der hier vorliegenden Erfindung wird dann, wenn bei einer Anforderung eines Boostbetriebs durch den Fahrer durch entsprechende Betätigung des Fahrpedals 8 der Boostbetrieb verhindert und/oder beendet und/oder limitiert wird, für den Fahrer am Fahrpedal 8 eine entsprechende Rückmeldung bzw. Reaktion erzeugt. Hierzu kann mit dem Fahrpedal 8 ein Aktuator 12 zusammenwirken, der dann, wenn der Boostbetrieb beendet bzw. deaktiviert und/oder verhindert und/oder limitiert wird, am Fahrpedal 8 eine Kraft anlegt, die der vom Fahrer vorgenommenen Betätigung des Fahrpedals 8 entgegenwirkt. Der Fahrer spürt demnach an seinem Fuß, mit welchem das Fahrpedal 8 betätigt wird, ob die Boostfunktion uneingeschränkt zugelassen wird oder nicht. Es ist möglich, die systemseitige Deaktivierung des Boostbetriebs eine definierte Zeitspanne vor Beendigung desselben dem Fahrer durch eine entsprechende Reaktion am Fahrpedal 8, insbesondere durch leich- te Stöße am Fahrpedal 8, anzukündigen. Das Überschreiten bzw. Erreichen des Grenzwerts 1 1 , bei welchen der Boostbetrieb fahrerseitig aktiviert wird, kann ebenfalls für den Fahrer am Fahrpedal 8 spürbar gemacht werden, z.B. durch einen mit erhöhter Betätigungskraft des Fahrpedals 8 zu überwindenden Druckpunkt. According to an advantageous embodiment of the present invention, when in a request for a boost operation by the driver by corresponding operation of the accelerator pedal 8, the boost operation is prevented and / or terminated and / or limited, for the driver on the accelerator pedal 8, a corresponding feedback or Reaction generated. For this purpose, with the accelerator pedal 8, an actuator 12 cooperate, which then when the boost mode is terminated or deactivated and / or prevented and / or limited, the accelerator pedal 8 applies a force that counteracts the operation of the accelerator pedal 8 made by the driver. The driver therefore feels at his foot, with which the accelerator pedal 8 is pressed, whether the boost function is fully allowed or not. It is possible that the system-side deactivation of the boost operation a defined period of time before the end of the same the driver by a corresponding reaction on the accelerator pedal 8, in particular by easy te shocks on accelerator pedal 8, announce. Exceeding or reaching the limit value 1 1, in which the boost mode is activated on the driver side, can also be made noticeable to the driver on the accelerator pedal 8, for example by a pressure point to be overcome with increased actuating force of the accelerator pedal 8.
Bezugszeichen reference numeral
Hybrisantrieb Hybrisantrieb
Verbrennungsmotor  internal combustion engine
Elektromotor  electric motor
Abtrieb  output
Getriebe  transmission
Motorsteuerungseinrichtung  Motor controller
Getriebesteuerungseinrichtung Transmission control device
Fahrpedal accelerator
Betätigungsbereich  operating range
Betätigungsbereich  operating range
Grenzwert  limit
Aktuator  actuator

Claims

Patentansprüche claims
1 . Verfahren zum Betreiben eines Hybridfahrzeugs, welches einen Hybridantrieb mit einem Verbrennungsmotor und einer elektrischen Maschine, einem mit der elektrischen Maschine zusammenwirkenden elektrischen Energiespeicher, einen zwischen den Hybridantrieb und einen Abtrieb geschaltetes Getriebe, ein Fahrpedal und ein Bremspedal umfasst, wobei 1 . A method for operating a hybrid vehicle comprising a hybrid drive with an internal combustion engine and an electric machine, an electric energy storage cooperating with the electric machine, a switched between the hybrid drive and an output gear, an accelerator pedal and a brake pedal, wherein
- abhängig von der Betätigung des Fahrpedals vom Hybridantrieb Fahrleistung angefordert und am Getriebeeingang bereitgestellt wird,  depending on the operation of the accelerator pedal, the hybrid drive requests driving power and is provided at the transmission input,
- abhängig von der Betätigung des Fahrpedals durch einen Fahrer ein Boost- betrieb des Hybridantriebs aktiviert und/oder deaktiviert wird, und  - Depending on the operation of the accelerator pedal by a driver, a boost operation of the hybrid drive is activated and / or deactivated, and
- im Boostbetrieb der Verbrennungsmotor und die elektrischen Maschine zur Fahrleistungssteigerung Fahrleistung bereitstellen,  - Provide driving performance in boost mode of the internal combustion engine and the electric machine for driving performance increase,
dadurch gekennzeichnet, dass characterized in that
- der Boostbetrieb des Hybridantriebs dann aktiviert wird, wenn die Betätigung des Fahrpedals ausgehend von einem relativ wenig betätigten Fahrpedal einen Grenzwert erreicht, und  - The boost operation of the hybrid drive is then activated when the operation of the accelerator pedal, starting from a relatively little-actuated accelerator pedal reaches a limit, and
- die Aktivierung des Boostbetriebs verhindert wird, wenn eine Ladungsgrenze des elektrischen Energiespeichers unterschritten ist.  - The activation of the boost operation is prevented when a charge limit of the electrical energy storage device is below.
2. Verfahren zum Betreiben eines Hybridfahrzeugs, welches einen Hybridantrieb mit einem Verbrennungsmotor und einer elektrischen Maschine, einem mit der elektrischen Maschine zusammenwirkenden elektrischen Energiespeicher, einen zwischen den Hybridantrieb und einen Abtrieb geschaltetes Getriebe, ein Fahrpedal und ein Bremspedal umfasst, wobei 2. A method for operating a hybrid vehicle, which comprises a hybrid drive with an internal combustion engine and an electric machine, a cooperating with the electric machine electrical energy storage, a switched between the hybrid drive and an output gear, an accelerator pedal and a brake pedal, wherein
- abhängig von der Betätigung des Fahrpedals vom Hybridantrieb Fahrleistung angefordert und am Getriebeeingang bereitgestellt wird,  depending on the operation of the accelerator pedal, the hybrid drive requests driving power and is provided at the transmission input,
- abhängig von der Betätigung des Fahrpedals durch einen Fahrer ein Boostbetrieb des Hybridantriebs aktiviert und/oder deaktiviert wird, und  - Depending on the operation of the accelerator pedal by a driver, a boost operation of the hybrid drive is activated and / or deactivated, and
- im Boostbetrieb der Verbrennungsmotor und die elektrischen Maschine zur Fahrleistungssteigerung Fahrleistung bereitstellen, dadurch gekennzeichnet, dass - Provide driving performance in boost mode of the internal combustion engine and the electric machine for driving performance increase, characterized in that
- der Boostbetrieb des Hybridantriebs dann deaktiviert wird, wenn die Betätigung des Fahrpedals ausgehend von einem relativ stark betätigten Fahrpedal einen Grenzwert erreicht, und  - The boost operation of the hybrid drive is then deactivated when the operation of the accelerator pedal reaches a limit, starting from a relatively heavily actuated accelerator pedal, and
- der Boostbetrieb vor Erreichen des Grenzwertes deaktiviert wird, wenn eine Ladungsgrenze des elektrischen Energiespeichers unterschritten wird.  - The boost mode is deactivated before reaching the limit, if a charge limit of the electrical energy storage is exceeded.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Grad des Boostbetriebs abhängig von der Betätigung des Fahrpedals bestimmt wird. 3. The method according to claim 1 or 2, characterized in that the degree of boost operation is determined depending on the operation of the accelerator pedal.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass bei einer abhängig von einer detektierten Fahrsituation des Hybridfahrzeugs und/oder abhängig von einem detektieren Zustands des Hybridantriebs vorgenommen Limitierung oder Verhinderung oder Deaktivierung des Boostbetriebs am Fahrpedal eine entsprechende Rückmeldung für den Fahrer bereitgestellt wird. 4. The method according to any one of claims 1 to 3, characterized in that made in a dependent on a detected driving situation of the hybrid vehicle and / or depending on a detected state of the hybrid drive limitation or prevention or deactivation of the boost operation on the accelerator pedal, a corresponding feedback for the driver provided.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass hierzu an das Fahrpedal eine entgegen der vom Fahrer vorgenommenen Betätigung wirkende Kraft angelegt wird. 5. The method according to claim 4, characterized in that for this purpose against the accelerator pedal operated by the driver acting force is applied.
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