EP3359792A1 - Method and device for operating a drive device, and drive device - Google Patents

Method and device for operating a drive device, and drive device

Info

Publication number
EP3359792A1
EP3359792A1 EP16760059.2A EP16760059A EP3359792A1 EP 3359792 A1 EP3359792 A1 EP 3359792A1 EP 16760059 A EP16760059 A EP 16760059A EP 3359792 A1 EP3359792 A1 EP 3359792A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
gas turbocharger
power
electric machine
drive device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16760059.2A
Other languages
German (de)
French (fr)
Inventor
Bernhard Matrohs
Detlev BAREUTHER
Klaus Theiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3359792A1 publication Critical patent/EP3359792A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • 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
    • 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
    • B60W2510/0633—Turbocharger 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
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0638—Turbocharger 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0666—Engine 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/43—Engines
    • B60Y2400/435—Supercharger or turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/24—Control of the pumps by using pumps or turbines with adjustable guide vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • 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
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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 drive device of a motor vehicle, comprising an internal combustion engine with a first
  • Exhaust gas turbocharger and a second exhaust gas turbocharger and at least one electric machine wherein the exhaust gas turbochargers are connected in series, wherein at least the second exhaust gas turbocharger has means for varying its power, wherein the power of at least the second exhaust gas turbocharger in response to a requested desired torque of the
  • the invention relates to a device for operating the above
  • At least one of the exhaust gas turbochargers usually two exhaust gas turbochargers, each associated with means for influencing the power of the respective exhaust gas turbocharger.
  • the means are, for example, electro-pneumatic actuators, actuatable wastegate valves and / or variable flow geometries.
  • German Offenlegungsschrift DE 10 2007 012 303 A1 already discloses a method for operating a hybrid drive, which has an internal combustion engine and an electric machine as drive units, in which the electric machine is actuated, a deviation of an actual torque from a setpoint torque compensate.
  • the method according to the invention with the features of claim 1 has the advantage that a delay of the torque build-up following a variation of the power of one of the exhaust gas turbochargers is compensated.
  • the electric machine is controlled in dependence on the time of the variation in order to compensate for a deviation of an actual torque of the drive device from the desired torque.
  • Electric machine is thus driven in response to a change in performance of the exhaust gas turbocharger, so that early on the electric machine is driven to generate a supporting drive torque.
  • Exhaust gas turbocharger increased to increase the boost pressure, which leads to a higher torque of the internal combustion engine.
  • the exhaust gas turbocharger dimensioned differently, it can also be provided that at
  • Exceeding the first limit value is changed from the one exhaust gas turbocharger to the other exhaust gas turbocharger or switched.
  • Exhaust gas turbocharger is varied such that the second exhaust gas turbocharger is connected only when the first limit value is exceeded.
  • the second exhaust gas turbocharger is thus initially deactivated and does not contribute to the boost pressure control.
  • the second exhaust gas turbocharger is associated with a bypass, in which an operable valve, in particular wastegate valve is located. By opening the valve, the exhaust gas flow past the turbine of the exhaust gas turbocharger, so that it is not driven by the exhaust gas.
  • the first exhaust gas turbocharger also has means for varying its power, wherein the power of the first
  • Exhaust gas turbocharger is varied in response to the requested target torque. Alternatively, it may be provided that the power of the
  • Exhaust gas turbocharger alone from the turbine supplied exhaust gas mass flow of the internal combustion engine can be influenced.
  • a bypass with a switchable valve is also associated with the first exhaust gas turbocharger, through which the exhaust gas mass flow of the internal combustion engine can be guided past the turbine of the first exhaust gas turbocharger.
  • the power of the second exhaust gas turbocharger can be varied by the valve of the associated bypass.
  • the current actual speed or the current boost pressure of at least the second exhaust gas turbocharger is detected, and that the timing of the variation in
  • a Betuschists the means or the manipulated variable of an actuator for varying the power of at least the second exhaust gas turbocharger monitors and the time for activation of the electric machine or the time of
  • Variation is determined depending on the BetuschistsistSh or the actuator position / manipulated variable.
  • the BetuschistSh or the actuator position / manipulated variable.
  • control of the electric machine is terminated, in particular in response to a hysteresis, when the actual speed and / or the BetreliistsistGra a target speed
  • Actuation target state it can be assumed that the second exhaust gas turbocharger has reached its desired performance. Thus, the support of the electric machine can be stopped. Due to the advantageous hysteresis is taken into account that due to the fluid dynamics conditions in the air system of the combustion engine, the charge pressure increases delayed to the increase in output of the exhaust gas turbocharger.
  • Hysteresis circuit is thus ensured that the support by the electric machine is not terminated prematurely.
  • the electric machine is advantageously controlled in response to a requested gear change.
  • a short-term traction interruption during a switching operation can be compensated.
  • the total torque provided by the drive device can be maintained even during a shift, which among other things, the change to the next transmission ratio improved and downshifts are avoided.
  • the change to the next transmission ratio improved and downshifts are avoided.
  • Electric machine can be compensated, prevented the downshift and instead controlled the electric machine accordingly.
  • the required additional power or the required torque of the electric machine determined to the
  • the device according to the invention with the features of claim 9 is characterized by a specially prepared control unit, the
  • inventive method performs under normal use. This results in the already mentioned advantages.
  • the drive device according to the invention with the features of claim 10 is characterized by the device according to the invention. This results in the already mentioned advantages.
  • Figure 2 shows a method for operating the drive device
  • FIG. 3 shows a further method for operating the drive device.
  • FIG. 1 shows a simplified representation of a drive device 1 of a motor vehicle not shown here.
  • the drive device 1 has an internal combustion engine 2, which is designed as a tension piston engine.
  • Internal combustion engine 2 is connected to an electric machine 3.
  • a rotor of the electric machine 3 is arranged rotationally fixed directly on the crankshaft 2 or the output shaft of the internal combustion engine 2.
  • Electric machine 3 is in turn connected to a transmission 4, which connects the drive device 1 with drive wheels of the motor vehicle.
  • the Transmission 4 has in particular several gear ratios, between which can be changed.
  • the internal combustion engine 2 is associated with two exhaust gas turbochargers 5 and 6, which are connected in series with each other. Both exhaust-gas turbochargers 5, 6 each have a turbine T 5 , T 6 and a compressor V 5 and V 6 connected to the turbine.
  • the exhaust gas turbochargers 5 and 6 are connected in series with each other, so that exhaust gas coming from the engine 2 is first supplied to the turbine T 6 of the exhaust gas turbocharger 6 and then to the turbine T 5 of the exhaust gas turbocharger 5. Accordingly, fresh air is first supplied to the compressor V 5 of the exhaust gas turbocharger 5 and then to the compressor V 6 of the exhaust gas turbocharger 6, so that the fresh air is compressed by the compressor V 5 and then the compressor V 6 and only then the internal combustion engine 2 is supplied.
  • the turbines T 5 and T 6 are each assigned a bypass B 5 or B 6 , each having a switchable wastegate valve W 5 or W 6 , by means of which a flow cross section of the respective bypass B 5 , B 6 , is adjustable. If the respective bypass B 5 , B 6 is completely closed by the respective wastegate valve W 5 , W 6 , then the exhaust gas or the exhaust gas mass flow of the internal combustion engine 2 is completely guided by the turbines T 6 and T 5 to the two exhaust gas turbochargers T 5 and T 6 drive.
  • the compressor V 6 another bypass BV 6 is associated with another valve WV 6 , through which the compressor V 6 supplied fresh air flow is adjustable.
  • the wastegate valves W 5, W 6 and WV 6 represent, in particular, means for varying the power of the respective exhaust-gas turbocharger 5, 6. By actuating the waste -gate valves W 5 and W 6, it is possible, for example during operation of the
  • Drive device 1 is a switching from a 2-stage operation, in which both exhaust gas turbochargers 5, 6 are operated, to a single-stage operation, in which only one of the exhaust gas turbocharger 5 or 6 is operated, are switched. In such a switch there is a delayed boost pressure buildup of the internal combustion engine 2 due to fluid dynamic conditions in the air duct system. As a result, the actual torque of the drive device 1 follows a delayed predetermined by a driver or requested by a driver target torque of the drive device. 1
  • the electric machine is driven to a
  • the power of the exhaust gas turbocharger 6 is varied by the control of the bypass. It is provided that the wastegate valve W 6 , as well as the other Wastegate- valves, a particular electric-pneumatic actuator is assigned, which moves the respective valve accordingly or operated. The actuator is driven in particular with a predeterminable duty cycle, in dependence of which a specifiable position of the respective valve results.
  • the duty cycle is monitored continuously, in response to the actuating position of the actuator, the performance of
  • Combustion engine 2 not immediately representable share of the torque increase to compensate.
  • the electric machine 3 is taken so early in operation that for the driver or occupant of a drive device 1 having motor vehicle, a uniform torque increase and in particular, no interruption of traction is noticeable.
  • the time of switching is advantageously set such that the
  • Additional torque of the electric machine 3 acts vorumblend and thereby a speed drop is avoided.
  • This can be implemented for example by a control logic of the control unit 7 as a function of the determined time of
  • FIG. 2 shows in a simplified representation a method for operating the drive device 1, in which the time of the changeover to
  • a step 8 the actuator of the wastegate valve 6 is driven to set a target duty ratio (E PWsoii). From the actuator's characteristic results in dependence on the electric current, a desired duty cycle from which an actual duty cycle TV or an actual position of the wastegate valve 6 results. As a result, the duty cycle TV of the actuator and, as a result, the time T are determined at which a variation of the power of the exhaust gas turbocharger 6 takes place. Depending on this duty cycle TV or time, the electric machine 3 is driven, wherein a release hysteresis in the following step 9 is used to control the electric machine 3.
  • a target duty ratio E PWsoii
  • Traction interruption of the transmission 4 is bridged during the switching operation.
  • the torque of the drive device 1 can also be kept at a higher level during the switching process, which improves the connection of the next gear ratio and Avoid downshifts.
  • the advantage in an additional torque assistance by the electric machine 3 as a function of a gear change, is the avoidance of traction loss and the avoidance of a downshift, since a higher gear can be used longer by the electric auxiliary drive.
  • FIG. 3 shows, for example, the additional power P to be provided by the electric machine 3 or the additional torque to be made available as a function of different gear changes G between the gears 1, 2, 3, 4 and 5 of the transmission 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to a method for operating a drive device (1) of a motor vehicle, comprising an internal combustion engine (2) having a first exhaust gas turbocharger (5) and a second exhaust gas turbocharger (6), and comprising at least one electric machine (3), wherein the exhaust gas turbochargers (5, 6) are connected in series, wherein at least the second exhaust gas turbocharger (6) has means for varying the output thereof, and wherein the output at least of the second exhaust gas turbocharger (6) is varied in accordance with a required target torque of the drive device (1). According to the invention, the electric machine (3) is controlled in accordance with the time of the variation, in order to compensate for a deviation of an actual torque of the drive device (1) from the target torque.

Description

Beschreibung Titel  Description title
Verfahren und Vorrichtung zum Betreiben einer Antriebsvorrichtung,  Method and device for operating a drive device,
Antriebs Vorrichtung Drive device
Die Erfindung betrifft ein Verfahren zum Betreiben einer Antriebsvorrichtung eines Kraftfahrzeugs, die einen Verbrennungsmotor mit einem ersten The invention relates to a method for operating a drive device of a motor vehicle, comprising an internal combustion engine with a first
Abgasturbolader und einem zweiten Abgasturbolader und wenigstens eine Elektromaschine aufweist, wobei die Abgasturbolader in Reihe geschaltet sind, wobei zumindest der zweite Abgasturbolader Mittel zum Variieren seiner Leistung aufweist, wobei die Leistung zumindest des zweiten Abgasturboladers in Abhängigkeit von einem angeforderten Soll-Drehmoment der Exhaust gas turbocharger and a second exhaust gas turbocharger and at least one electric machine, wherein the exhaust gas turbochargers are connected in series, wherein at least the second exhaust gas turbocharger has means for varying its power, wherein the power of at least the second exhaust gas turbocharger in response to a requested desired torque of the
Antriebsvorrichtung variiert wird. Drive device is varied.
Ferner betrifft die Erfindung eine Vorrichtung zum Betreiben der oben Furthermore, the invention relates to a device for operating the above
beschriebenen Antriebsvorrichtung sowie eine entsprechende described drive device and a corresponding
Antriebsvorrichtung. Drive device.
Stand der Technik State of the art
Verfahren, Vorrichtungen und Antriebsvorrichtungen der eingangs genannten Art sind aus dem Stand der Technik bekannt. Um die Leistung eines Methods, devices and drive devices of the type mentioned are known from the prior art. To the performance of a
Verbrennungsmotors zu erhöhen, ist es bekannt, dem Verbrennungsmotor einen Abgasturbolader zuzuordnen, der vom Abgas des Verbrennungsmotors angetrieben wird und komprimierte Frischluft dem Verbrennungsmotor zur Verbrennung zuführt. Um die Leistung weiter zu erhöhen, und um eine erhöhte Variabilität zu erhalten, ist es außerdem bekannt, dem Verbrennungsmotor zwei Abgasturbolader zuzuordnen, die in Reihe geschaltet sind, wobei in Abhängigkeit von einem angeforderten Soll-Drehmoment der Antriebsvorrichtung der To increase the internal combustion engine, it is known to associate the internal combustion engine with an exhaust gas turbocharger, which is driven by the exhaust gas of the internal combustion engine and supplies compressed fresh air to the internal combustion engine for combustion. In order to further increase the power, and to obtain an increased variability, it is also known to associate the engine with two exhaust gas turbochargers, which are connected in series, wherein, depending on a requested target torque of the drive device of the
Verbrennungsmotor und die Abgasturbolader angesteuert werden, um einerseits das Soll-Drehmoment beziehungsweise Wunschdrehmoment umzusetzen, und um andererseits in Bezug auf Verbrauch und Emission optimale Betriebspunkte der Komponenten der Antriebsvorrichtung zu erhalten. Dazu sind zumindest einem der Abgasturbolader, üblicherweise beiden Abgasturboladern, jeweils Mittel zum Beeinflussen der Leistung des jeweiligen Abgasturboladers zugeordnet. Bei den Mitteln handelt es sich beispielsweise um elektro- pneumatische Stellglieder, betätigbare Wastegate-Ventile und/oder veränderbare Strömungsgeometrien. Bei einer Variierung der Leistung von zumindest einem der Abgasturbolader, insbesondere bei einer Umschaltung von einem Combustion engine and the turbocharger are driven, on the one hand to implement the desired torque or desired torque, and on the other hand to obtain in terms of consumption and emission optimal operating points of the components of the drive device. For this purpose, at least one of the exhaust gas turbochargers, usually two exhaust gas turbochargers, each associated with means for influencing the power of the respective exhaust gas turbocharger. The means are, for example, electro-pneumatic actuators, actuatable wastegate valves and / or variable flow geometries. In a variation of the power of at least one of the exhaust gas turbocharger, in particular when switching from one
zweistufigen auf einen einstufigen Betrieb, kommt es zu nicht vermeidbaren Ladedruckeinbrüchen. Beim Beschleunigen wird der Ladedruck außerdem auch verzögert aufgebaut, da die für den Ladedruck erforderliche Enthalpie auf der Turbinenseite (noch) nicht zur Verfügung steht. Ursächlich für eine derartige Abweichung des Ladedrucks von einem gewünschten Soll-Ladedruck ist, dass der Abgasmassenstrom nicht schnell genug auf die erforderliche Regelgröße, also auf den Soll-Ladedruck, eingeregelt werden kann. Two-stage to a single-stage operation, it comes to unavoidable boost pressure drops. When accelerating the boost pressure is also built up delayed, since the required for the boost pressure enthalpy on the turbine side (yet) is not available. The reason for such a deviation of the boost pressure from a desired target boost pressure is that the exhaust gas mass flow can not be adjusted quickly enough to the required control variable, that is, to the desired boost pressure.
Dadurch kann ein gewünschtes Soll-Drehmoment nur verzögert durch die Antriebsvorrichtung zur Verfügung gestellt werden. Bei einer plötzlichen Thereby, a desired target torque can be provided only delayed by the drive device. In a sudden
Erhöhung des Soll-Drehmoments und bei Variierungen der Leistung der einen oder beiden Abgasturbolader führt eine derartige Verzögerung zu Increasing the desired torque and varying the power of the one or both turbochargers will cause such a delay
Komforteinbußen, insbesondere zu mangelnder Agilität, im Fahrbetrieb. Loss of comfort, in particular to lack of agility, while driving.
Aus der Offenlegungsschrift DE 10 2007 012 303 AI ist bereits ein Verfahren zum Betreiben eines Hybridantriebs, der einen Verbrennungsmotor und eine Elektromaschine als Antriebsaggregate aufweist, bekannt, bei welchem die Elektromaschine dazu angesteuert wird, eine Abweichung eines Ist- Drehmoments von einem Soll-Drehmoment zu kompensieren. German Offenlegungsschrift DE 10 2007 012 303 A1 already discloses a method for operating a hybrid drive, which has an internal combustion engine and an electric machine as drive units, in which the electric machine is actuated, a deviation of an actual torque from a setpoint torque compensate.
Offenbarung der Erfindung Disclosure of the invention
Das erfindungsgemäße Verfahren mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass eine bei einer Variierung der Leistung eines der Abgasturbolader folgende Verzögerung des Drehmomentaufbaus kompensiert wird. Außerdem wird durch das erfindungsgemäße Verfahren erreicht, dass auf kostengünstigere und leistungsärmere Abgasturbolader zurückgegriffen werden kann, bei gleichbleibender Leistung der Antriebsvorrichtung. Erfindungsgemäß ist vorgesehen, dass die Elektromaschine in Abhängigkeit vom Zeitpunkt der Variierung angesteuert wird, um eine Abweichung eines Ist-Drehmoments der Antriebsvorrichtung von dem Soll-Drehmoment zu kompensieren. Die The method according to the invention with the features of claim 1 has the advantage that a delay of the torque build-up following a variation of the power of one of the exhaust gas turbochargers is compensated. In addition, it is achieved by the inventive method that more cost effective and low-power exhaust gas turbocharger can be used, while maintaining the performance of the drive device. According to the invention it is provided that the electric machine is controlled in dependence on the time of the variation in order to compensate for a deviation of an actual torque of the drive device from the desired torque. The
Elektromaschine wird somit in Abhängigkeit einer Leistungsveränderung eines der Abgasturbolader angesteuert, sodass bereits frühzeitig die Elektromaschine zum Erzeugen eines unterstützenden Antriebsdrehmoments angesteuert wird. Dadurch, dass die Ansteuerung in Abhängigkeit vom Zeitpunkt der Variierung erfolgt, wird dem drohenden Leistungsverlust frühzeitig entgegengewirkt, sodass er sieh insbesondere nicht fahrkomfortmindernd auswirkt. Durch die Ansteuerung der Elektromaschine kann somit die Zeit bis zur Erreichung des gewünschten Ladedrucks überbrückt werden.  Electric machine is thus driven in response to a change in performance of the exhaust gas turbocharger, so that early on the electric machine is driven to generate a supporting drive torque. The fact that the activation takes place in dependence on the time of the variation, the impending loss of power is counteracted early on, so he behaves especially not driving comfort-reducing. By controlling the electric machine thus the time can be bridged until the desired boost pressure.
Gemäß einer bevorzugten Weiterbildung der Erfindung ist vorgesehen, dass die Leistung des zweiten Abgasturboladers derart variiert wird, dass bei According to a preferred embodiment of the invention it is provided that the power of the second exhaust gas turbocharger is varied such that at
Überschreiten eines ersten Grenzwertes durch das angeforderte Soll- Drehmoment die Leistung des zweiten Abgasturboladers erhöht wird. Wird also ein Drehmoment von der Antriebsvorrichtung gefordert, das einen vorgebbaren erster Grenzwert überschreitet, so wird die Leistung des zweiten Exceeding a first limit by the requested desired torque, the power of the second exhaust gas turbocharger is increased. Thus, if a torque required by the drive device exceeds a predeterminable first limit value, then the power of the second
Abgasturboladers erhöht, um den Ladedruck zu erhöhen, der zu einem höheren Drehmoment des Verbrennungsmotors führt. Sind die Abgasturbolader unterschiedlich dimensioniert, so kann auch vorgesehen sein, dass bei Exhaust gas turbocharger increased to increase the boost pressure, which leads to a higher torque of the internal combustion engine. Are the exhaust gas turbocharger dimensioned differently, it can also be provided that at
Überschreiten des ersten Grenzwerts von dem einen Abgasturbolader zu dem anderen Abgasturbolader gewechselt beziehungsweise umgeschaltet wird. Exceeding the first limit value is changed from the one exhaust gas turbocharger to the other exhaust gas turbocharger or switched.
Bevorzugt ist jedoch vorgesehen, dass die Leistung des zweiten Preferably, however, it is provided that the power of the second
Abgasturboladers derart variiert wird, dass der zweite Abgasturbolader erst bei Überschreiten des ersten Grenzwertes hinzugeschaltet wird. Bei Überschreiten des ersten Grenzwertes ist der zweite Abgasturbolader somit zunächst deaktiviert und trägt nicht zur Ladedruckregelung bei. Dies kann beispielsweise dadurch erfolgen, dass dem zweiten Abgasturbolader ein Bypass zugeordnet ist, in welchem ein betätigbares Ventil, insbesondere Wastegate-Ventil liegt. Durch Öffnen des Ventils wird der Abgasstrom an der Turbine des Abgasturboladers vorbeigeführt, sodass diese nicht durch das Abgas angetrieben wird. Weiterhin ist bevorzugt vorgesehen, dass auch der erste Abgasturbolader Mittel zum Variieren seiner Leistung aufweist, wobei die Leistung des ersten Exhaust gas turbocharger is varied such that the second exhaust gas turbocharger is connected only when the first limit value is exceeded. When the first limit value is exceeded, the second exhaust gas turbocharger is thus initially deactivated and does not contribute to the boost pressure control. This can be done, for example, that the second exhaust gas turbocharger is associated with a bypass, in which an operable valve, in particular wastegate valve is located. By opening the valve, the exhaust gas flow past the turbine of the exhaust gas turbocharger, so that it is not driven by the exhaust gas. Furthermore, it is preferably provided that the first exhaust gas turbocharger also has means for varying its power, wherein the power of the first
Abgasturboladers in Abhängigkeit von dem angeforderten Soll-Drehmoment variiert wird. Alternativ kann vorgesehen sein, dass die Leistung des Exhaust gas turbocharger is varied in response to the requested target torque. Alternatively, it may be provided that the power of the
Abgasturboladers allein von dem seiner Turbine zugeführten Abgasmassenstrom der Verbrennungskraftmaschine beeinflussbar ist. Vorzugsweise ist dem ersten Abgasturbolader ebenfalls ein Bypass mit einem schaltbaren Ventil zugeordnet, durch welchen der Abgasmassenstrom der Brennkraftmaschine an der Turbine des ersten Abgasturboladers vorbeiführbar ist. Durch eine variable Einstellung des Ventils kann der Durchströmungsquerschnitt des Bypasses verändert werden, um die Leistung des ersten Abgasturboladers zu beeinflussen. Exhaust gas turbocharger alone from the turbine supplied exhaust gas mass flow of the internal combustion engine can be influenced. Preferably, a bypass with a switchable valve is also associated with the first exhaust gas turbocharger, through which the exhaust gas mass flow of the internal combustion engine can be guided past the turbine of the first exhaust gas turbocharger. By a variable adjustment of the valve, the flow cross-section of the bypass can be changed to affect the performance of the first exhaust gas turbocharger.
Entsprechend kann auch die Leistung des zweiten Abgasturboladers durch das Ventil des hinzugeordneten Bypasses variiert werden. Accordingly, the power of the second exhaust gas turbocharger can be varied by the valve of the associated bypass.
Gemäß einer bevorzugten Weiterbildung der Erfindung ist vorgesehen, dass die aktuelle Ist-Drehzahl oder der aktuelle Ladedruck zumindest des zweiten Abgasturboladers erfasst wird, und dass der Zeitpunkt der Variierung in According to a preferred embodiment of the invention it is provided that the current actual speed or the current boost pressure of at least the second exhaust gas turbocharger is detected, and that the timing of the variation in
Abhängigkeit von der erfassten Ist-Drehzahl oder einer erfassten Soll-/lst- Abweichung des Ladedrucks bestimmt wird. Durch das Erfassen der aktuellen Ist-Drehzahl beziehungsweise der Soll-/lst-Abweichung oder des Ist-Ladedrucks bzw. der Soll-/lst-Abweichung des Ladedrucks wird auf einfache Art und Weise ermittelt, ob die Leistung des zweiten Abgasturboladers verändert werden soll. Somit ist der Zeitpunkt, zu welchem die Leistung des zweiten Abgasturboladers verändert wird, auf einfache Art und Weise bestimmbar. Depending on the detected actual speed or a detected setpoint / lst- deviation of the boost pressure is determined. By detecting the current actual speed or the setpoint / actual deviation or the actual boost pressure or the setpoint / actual deviation of the charge pressure, it is determined in a simple manner whether the power of the second exhaust gas turbocharger should be changed. Thus, the time at which the power of the second exhaust gas turbocharger is changed, can be determined in a simple manner.
Alternativ oder zusätzlich ist vorgesehen, dass ein Betätigungsistzustand der Mittel beziehungsweise die Stellgröße einer Aktuatorik zum Variieren der Leistung zumindest des zweiten Abgasturboladers überwacht und der Zeitpunkt zur Aktivierung der Elektromaschine beziehungsweise der Zeitpunkt derAlternatively or additionally, it is provided that a Betätigungsistzustand the means or the manipulated variable of an actuator for varying the power of at least the second exhaust gas turbocharger monitors and the time for activation of the electric machine or the time of
Variierung in Abhängigkeit von dem Betätigungsistzustand beziehungsweise der Stellerposition/Stellgröße bestimmt wird. Hierzu wird beispielsweise der Variation is determined depending on the Betätigungsistzustand or the actuator position / manipulated variable. For this purpose, for example, the
Betätigungsistzustand oder die Stellerposition des Ventils des dem zweiten Abgasturbolader zugeordneten Bypasses überwacht. Insbesondere kann vorgesehen sein, dass dazu ein Tastverhältnis der Ansteuerung beziehungsweise eines Aktuators des Ventils überwacht wird. In Abhängigkeit von dem so erfassten Betätigungsistzustand wird sich die Leistung des zweiten Abgasturboladers verändern. Somit ist auch auf diese Art und Weise ein sicheres Bestimmen des Zeitpunkts der Variierung gewährleistet. Be actuated state or the actuator position of the valve of the second exhaust gas turbocharger associated bypass monitored. In particular, it can be provided that a duty cycle of the control or an actuator of the valve is monitored. Depending on the thus detected Betätigungsistzustand the performance of the second exhaust gas turbocharger will change. Thus, a safe determination of the timing of the variation is ensured in this way.
Ferner ist bevorzugt vorgesehen, dass die Ansteuerung der Elektromaschine insbesondere in Abhängigkeit von einer Hysterese beendet wird, wenn die Ist- Drehzahl und/oder der Betätigungsistzustand einer Soll-Drehzahl Further, it is preferably provided that the control of the electric machine is terminated, in particular in response to a hysteresis, when the actual speed and / or the Betätigungsistzustand a target speed
beziehungsweise einem Betätigungssollzustand entsprechen. Entspricht die Ist- Drehzahl der Soll-Drehzahl und/oder der Betätigungsistzustand dem or an actuation target state. Corresponds to the actual speed of the desired speed and / or the Betätigungsistzustand the
Betätigungssollzustand, so kann davon ausgegangen werden, dass der zweite Abgasturbolader seine gewünschte Leistung erreicht hat. Damit kann die Unterstützung der Elektromaschine beendet werden. Durch die vorteilhafte Hysterese wird berücksichtigt, dass aufgrund der strömungsdynamischen Verhältnisse im Luftsystem des Verbrennungsmotos der Ladedruck verzögert zu der Leistungserhöhung des Abgasturboladers ansteigt. Durch die Actuation target state, it can be assumed that the second exhaust gas turbocharger has reached its desired performance. Thus, the support of the electric machine can be stopped. Due to the advantageous hysteresis is taken into account that due to the fluid dynamics conditions in the air system of the combustion engine, the charge pressure increases delayed to the increase in output of the exhaust gas turbocharger. By the
Hystereseschaltung wird somit gewährleistet, dass die Unterstützung durch die Elektromaschine nicht vorzeitig beendet wird. Hysteresis circuit is thus ensured that the support by the electric machine is not terminated prematurely.
Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass die Elektromaschine vorteilhafterweise in Abhängigkeit von einem angeforderten Gangwechsel angesteuert wird. Dadurch ist insbesondere eine kurzzeitige Kraftschlussunterbrechung während eines Schaltvorgangs kompensierbar. Damit kann das von der Antriebsvorrichtung insgesamt zur Verfügung gestellte Drehmoment auch während eines Schaltvorgangs aufrechterhalten werden, wodurch unter anderem auch der Wechsel zu der nächsten Getriebeübersetzung verbessert und Rückschaltungen vermieden werden. Insbesondere wird bei einem angeforderten Gangwechsel zur According to a further preferred embodiment of the invention it is provided that the electric machine is advantageously controlled in response to a requested gear change. As a result, in particular a short-term traction interruption during a switching operation can be compensated. Thus, the total torque provided by the drive device can be maintained even during a shift, which among other things, the change to the next transmission ratio improved and downshifts are avoided. In particular, at a requested gear change to
Rückschaltung geprüft, ob diese Rückschaltung durch eine Ansteuerung der Elektromaschine vermieden werden kann. Entsprechend wird dann, wenn die durch die Rückschaltung zu erzielenden Drehmomenterhöhung der Downshift checked whether this downshift can be avoided by a control of the electric machine. Accordingly, when the torque increase to be achieved by the downshifting of the
Antriebsvorrichtung durch ein erhöhtes Antriebsdrehmoment der Drive device by an increased drive torque of
Elektromaschine kompensiert werden kann, die Rückschaltung unterbunden und stattdessen die Elektromaschine entsprechend angesteuert. Im Falle eines Hochschaltens wird bevorzugt die erforderliche Zusatzleistung beziehungsweise das erforderliche Drehmoment der Elektromaschine ermittelt, um den Electric machine can be compensated, prevented the downshift and instead controlled the electric machine accordingly. In the case of an upshift is preferred, the required additional power or the required torque of the electric machine determined to the
verzögerten Ladedruckaufbau, wie zuvor bereits beschrieben, optimal zu kompensieren. delayed charge pressure build-up, as previously described, to compensate optimally.
Die erfindungsgemäße Vorrichtung mit den Merkmalen des Anspruchs 9 zeichnet sich durch ein speziell hergerichtetes Steuergerät aus, das das The device according to the invention with the features of claim 9 is characterized by a specially prepared control unit, the
erfindungsgemäße Verfahren bei bestimmungsgemäßem Gebrauch durchführt. Es ergeben sich hierdurch die bereits genannten Vorteile. inventive method performs under normal use. This results in the already mentioned advantages.
Die erfindungsgemäße Antriebsvorrichtung mit den Merkmalen des Anspruchs 10 zeichnet sich durch die erfindungsgemäße Vorrichtung. Es ergeben sich hierdurch die bereits genannten Vorteile. The drive device according to the invention with the features of claim 10 is characterized by the device according to the invention. This results in the already mentioned advantages.
Weitere Vorteile und bevorzugte Merkmale und Merkmalskombinationen ergeben sich insbesondere aus dem zuvor Beschriebenen und den Ansprüchen. Further advantages and preferred features and combinations of features emerge in particular from the previously described and the claims.
Im Folgenden sollen die Erfindung und ihre Vorteile anhand der Zeichnung näher erläutert werden. Dazu zeigen In the following, the invention and its advantages will be explained in more detail with reference to the drawing. Show this
Figur 1 eine Antriebsvorrichtung eines Kraftfahrzeugs in einer vereinfachten Darstellung, 1 shows a drive device of a motor vehicle in a simplified representation,
Figur 2 ein Verfahren zum Betreiben der Antriebsvorrichtung und Figure 2 shows a method for operating the drive device and
Figur 3 ein weiteres Verfahren zum Betreiben der Antriebsvorrichtung. FIG. 3 shows a further method for operating the drive device.
Figur 1 zeigt in einer vereinfachten Darstellung eine Antriebsvorrichtung 1 eines hier nicht näher dargestellten Kraftfahrzeugs. Die Antriebsvorrichtung 1 weist einen Verbrennungsmotor 2 auf, der als Zugkolbenmotor ausgebildet ist. Der Verbrennungsmotor 2 beziehungsweise eine Kurbelwelle des Figure 1 shows a simplified representation of a drive device 1 of a motor vehicle not shown here. The drive device 1 has an internal combustion engine 2, which is designed as a tension piston engine. The internal combustion engine 2 or a crankshaft of the
Verbrennungsmotors 2 ist mit einer Elektromaschine 3 verbunden. Insbesondere ist ein Rotor der Elektromaschine 3 direkt auf der Kurbelwelle 2 beziehungsweise der Abtriebswelle des Verbrennungsmotors 2 drehfest angeordnet. Die Internal combustion engine 2 is connected to an electric machine 3. In particular, a rotor of the electric machine 3 is arranged rotationally fixed directly on the crankshaft 2 or the output shaft of the internal combustion engine 2. The
Elektromaschine 3 ist wiederum mit einem Getriebe 4 verbunden, welches die Antriebvorrichtung 1 mit Antriebsrädern des Kraftfahrzeugs verbindet. Das Getriebe 4 weist dabei insbesondere mehrere Übersetzungsstufen auf, zwischen denen gewechselt werden kann. Electric machine 3 is in turn connected to a transmission 4, which connects the drive device 1 with drive wheels of the motor vehicle. The Transmission 4 has in particular several gear ratios, between which can be changed.
Dem Verbrennungsmotor 2 sind zwei Abgasturbolader 5 und 6 zugeordnet, die in Reihe zueinander geschaltet sind. Beide Abgasturbolader 5, 6 weisen jeweils eine Turbine T5, T6 sowie einen mit der Turbine verbundenen Verdichter V5 und V6 auf. Die Abgasturbolader 5 und 6 sind in Reihe zueinander geschaltet, sodass von dem Verbrennungsmotor 2 kommendes Abgas zunächst der Turbine T6 des Abgasturboladers 6 und anschließend der Turbine T5 des Abgasturboladers 5 zugeführt wird. Entsprechend wird Frischluft zunächst dem Verdichter V5 des Abgasturboladers 5 und anschließend dem Verdichter V6 des Abgasturboladers 6 zugeführt, sodass die Frischluft durch den Verdichter V5 und anschließend den Verdichter V6 verdichtet und erst dann dem Verbrennungsmotor 2 zugeführt wird. The internal combustion engine 2 is associated with two exhaust gas turbochargers 5 and 6, which are connected in series with each other. Both exhaust-gas turbochargers 5, 6 each have a turbine T 5 , T 6 and a compressor V 5 and V 6 connected to the turbine. The exhaust gas turbochargers 5 and 6 are connected in series with each other, so that exhaust gas coming from the engine 2 is first supplied to the turbine T 6 of the exhaust gas turbocharger 6 and then to the turbine T 5 of the exhaust gas turbocharger 5. Accordingly, fresh air is first supplied to the compressor V 5 of the exhaust gas turbocharger 5 and then to the compressor V 6 of the exhaust gas turbocharger 6, so that the fresh air is compressed by the compressor V 5 and then the compressor V 6 and only then the internal combustion engine 2 is supplied.
Den Turbinen T5 und T6 ist jeweils ein Bypass B5 beziehungsweise B6 zugeordnet, der jeweils ein schaltbares Wastegate-Ventil W5 beziehungsweise W6 aufweist, mittels dessen ein Durchströmungsquerschnitt des jeweiligen Bypasses B5, B6, einstellbar ist. Ist der jeweilige Bypass B5, B6 durch das jeweilige Wastgate-Ventil W5, W6 vollständig verschlossen, so wird das Abgas beziehungsweise der Abgasmassenstrom des Verbrennungsmotors 2 vollständig durch die Turbinen T6 und T5 geführt, um die beiden Abgasturbolader T5 und T6 anzutreiben. The turbines T 5 and T 6 are each assigned a bypass B 5 or B 6 , each having a switchable wastegate valve W 5 or W 6 , by means of which a flow cross section of the respective bypass B 5 , B 6 , is adjustable. If the respective bypass B 5 , B 6 is completely closed by the respective wastegate valve W 5 , W 6 , then the exhaust gas or the exhaust gas mass flow of the internal combustion engine 2 is completely guided by the turbines T 6 and T 5 to the two exhaust gas turbochargers T 5 and T 6 drive.
Vorliegend ist auch dem Verdichter V6 ein weiterer Bypass BV6 zugeordnet mit einem weiteren Ventil WV6, durch welches der dem Verdichter V6 zugeführte Frischluftstrom regulierbar ist. In the present case, the compressor V 6 another bypass BV 6 is associated with another valve WV 6 , through which the compressor V 6 supplied fresh air flow is adjustable.
Die Wastegate-Ventile W5, W6 und WV6 stellen insbesondere Mittel zum Variieren der Leistung des jeweiligen Abgasturboladers 5, 6 dar. Durch das Betätigen der Wastegate-Ventile W5 und W6 kann beispielsweise im Betrieb der The wastegate valves W 5, W 6 and WV 6 represent, in particular, means for varying the power of the respective exhaust-gas turbocharger 5, 6. By actuating the waste -gate valves W 5 and W 6, it is possible, for example during operation of the
Antriebsvorrichtung 1 eine Umschaltung von einem 2-stufigen Betrieb, bei welchem beide Abgasturbolader 5, 6 betrieben werden, zu einem einstufigen Betrieb, bei welchem nur noch einer der Abgasturbolader 5 oder 6 betrieben wird, umgeschaltet werden. Bei einer derartigen Umschaltung kommt es zu einem verzögerten Ladedruckaufbau des Verbrennungsmotors 2 aufgrund der strömungsdynamischen Verhältnisse in dem Luftführungssystem. Dadurch folgt das Ist-Drehmoment der Antriebsvorrichtung 1 verzögert einem von einem Fahrer vorgegebenen beziehungsweise von einem Fahrer angeforderten Soll- Drehmoment der Antriebsvorrichtung 1. Drive device 1 is a switching from a 2-stage operation, in which both exhaust gas turbochargers 5, 6 are operated, to a single-stage operation, in which only one of the exhaust gas turbocharger 5 or 6 is operated, are switched. In such a switch there is a delayed boost pressure buildup of the internal combustion engine 2 due to fluid dynamic conditions in the air duct system. As a result, the actual torque of the drive device 1 follows a delayed predetermined by a driver or requested by a driver target torque of the drive device. 1
Vorliegend ist vorgesehen, dass bei einem Umschalten die Elektromaschine 3 dazu angesteuert wird, diese Abweichung des Ist-Drehmoments von dem Soll- Drehmoment zu kompensieren. Dazu ist vorliegend vorgesehen, dass in In the present case, it is provided that when switching the electric machine 3 is controlled to compensate for this deviation of the actual torque of the target torque. For this purpose, it is provided that in
Abhängigkeit von dem Zeitpunkt der Variierung der Leistung zumindest eines der Abgasturbolader 5, 6 die Elektromaschine angesteuert wird, um ein Depending on the time of varying the power of at least one of the exhaust gas turbochargers 5, 6, the electric machine is driven to a
Zusatzdrehmoment zu erzeugen, das den verzögerten Drehmomentaufbau des Verbrennungsmotors 2 kompensiert. Vorliegend wird dabei von dem Beispiel ausgegangen, dass bei Überschreiten eines vorgebbaren Grenzwerts durch das angeforderte Soll-Drehmoment zwischen den Abgasturboladern 5 und 6 umgeschaltet wird, wobei insbesondere die Hochdruckstufe bei hoher  To generate additional torque that compensates for the delayed torque buildup of the engine 2. In the present case, it is assumed that, when a predeterminable limit value is exceeded, the system switches over between the exhaust-gas turbochargers 5 and 6 due to the requested setpoint torque, in particular the high-pressure stage at high pressure
Leistungsanforderung entkoppelt wird. Für das Umschalten wird die Leistung der Abgasturbolader 6 durch die Ansteuerung des Bypasses variiert. Dabei ist vorgesehen, dass dem Wastegate-Ventil W6, wie auch den anderen Wastegate- Ventilen, ein insbesondere elektrisch-pneumatischer Aktuator zugeordnet ist, der das jeweilige Ventil entsprechend bewegt beziehungsweise betätigt. Der Aktuator wird insbesondere mit einem vorgebbaren Tastverhältnis angesteuert, in dessen Abhängigkeit sich eine vorgebbare Stellung des jeweiligen Ventils ergibt. Power requirement is decoupled. For the switching, the power of the exhaust gas turbocharger 6 is varied by the control of the bypass. It is provided that the wastegate valve W 6 , as well as the other Wastegate- valves, a particular electric-pneumatic actuator is assigned, which moves the respective valve accordingly or operated. The actuator is driven in particular with a predeterminable duty cycle, in dependence of which a specifiable position of the respective valve results.
Durch das Steuergerät 7 wird das Tastverhältnis laufend überwacht, um in Abhängigkeit von der Stellposition des Aktuators die Leistung des By the control unit 7, the duty cycle is monitored continuously, in response to the actuating position of the actuator, the performance of
Abgasturboladers beziehungsweise eine Variierung der Leistung des  Exhaust gas turbocharger or a variation of the performance of
Abgasturboladers 6 festzustellen. Insbesondere kann durch Überwachung der Ladedruckabweichung, die sich in Folge der Leistung des Abgasturboladers ergibt, der Zeitpunkt ermittelt werden, an welchem die Leistung des Find exhaust turbocharger 6. In particular, by monitoring the charge pressure deviation, which results as a result of the power of the exhaust gas turbocharger, the time can be determined at which the performance of
Abgasturboladers 6 tatsächlich verändert wird. In Abhängigkeit dieses Exhaust gas turbocharger 6 is actually changed. Depending on this
Zeitpunktes wird die Elektromaschine 3 dazu angesteuert, den von dem  Time, the electric machine 3 is driven to that of the
Verbrennungsmotor 2 nicht sofort darstellbaren Anteil der Drehmomenterhöhung zu kompensieren. Dadurch ist die Elektromaschine 3 derart frühzeitig in Betrieb genommen, dass für den Fahrer oder Insassen eines die Antriebsvorrichtung 1 aufweisenden Kraftfahrzeugs eine gleichmäßige Drehmomentzunahme und insbesondere keine Zugkraftunterbrechung spürbar ist. Der Zeitpunkt der Umschaltung wird vorteilhafterweise derart festgelegt, dass das Combustion engine 2 not immediately representable share of the torque increase to compensate. As a result, the electric machine 3 is taken so early in operation that for the driver or occupant of a drive device 1 having motor vehicle, a uniform torque increase and in particular, no interruption of traction is noticeable. The time of switching is advantageously set such that the
Zusatzdrehmoment der Elektromaschine 3 vorsteuernd wirkt und dadurch ein Drehzahleinbruch vermieden wird. Umsetzbar ist dies beispielsweise durch eine Ansteuerlogik des Steuergeräts 7 in Abhängigkeit des ermittelten Zeitpunkts derAdditional torque of the electric machine 3 acts vorsteuernd and thereby a speed drop is avoided. This can be implemented for example by a control logic of the control unit 7 as a function of the determined time of
Variierung beziehungsweise der Ladedruckabweichungen und/oder der Stellposition der Aktuatorik, wie zuvor bereits erläutert. Varying or the boost pressure deviations and / or the actuating position of the actuator, as already explained above.
Figur 2 zeigt in einer vereinfachten Darstellung ein Verfahren zum Betreiben der Antriebsvorrichtung 1, bei welchem der Zeitpunkt der Umschaltung in FIG. 2 shows in a simplified representation a method for operating the drive device 1, in which the time of the changeover to
Abhängigkeit vom Tastverhältnis ermittelt wird. Dazu zeigt die Figur 2 ein vereinfachtes Flussdiagramm. Zunächst wird in einem Schritt 8 der Aktuator des Wastegate-Ventils 6 dazu angesteuert, ein Soll-Tastverhältnis einzustellen (E PWsoii). Aus der aktuatoreigenen Kennlinie ergibt sich in Abhängigkeit vom elektrischen Strom ein Soll-Tastverhältnis aus dem sich ein Ist- Tastverhältnis TV beziehungsweise eine Ist- Stellung des Wastegate-Ventils 6 ergibt. Dadurch werden das Tastverhältnis TV des Stellers und in Folge dessen der Zeitpunkt T ermittelt, zu welchem eine Variierung der Leistung des Abgasturboladers 6 erfolgt. In Abhängigkeit von diesem Tastverhältnis TV bzw. Zeitpunkt wird die Elektromaschine 3 angesteuert, wobei eine Freigabe- Hysterese im folgenden Schritt 9 dazu verwendet wird, die Elektromaschine 3 anzusteuern. Diese sieht vor, dass über einem definierten Tastverhältnis bzw. Zeitpunkt, zu welchem die Variierung erfasst wird, die Elektromaschine 3 angesteuert (on) wird, um das fehlende Drehmoment Md zu kompensieren. Der Betrieb der Elektromaschine 3 wird jedoch verzögert zu dem Zeitpunkt beendet (off), zu welchem davon ausgegangen werden kann, dass der Abgasturbolader 6 die gewünschte Leistung erzeugt. Dependence on the duty cycle is determined. 2 shows a simplified flowchart. First, in a step 8, the actuator of the wastegate valve 6 is driven to set a target duty ratio (E PWsoii). From the actuator's characteristic results in dependence on the electric current, a desired duty cycle from which an actual duty cycle TV or an actual position of the wastegate valve 6 results. As a result, the duty cycle TV of the actuator and, as a result, the time T are determined at which a variation of the power of the exhaust gas turbocharger 6 takes place. Depending on this duty cycle TV or time, the electric machine 3 is driven, wherein a release hysteresis in the following step 9 is used to control the electric machine 3. This provides that over a defined duty cycle or time at which the variation is detected, the electric machine 3 is driven (on) to compensate for the missing torque Md. However, the operation of the electric machine 3 is delayed (off) at the time when it can be assumed that the exhaust gas turbocharger 6 generates the desired power.
Für eine bessere Anbindung des Drehmoments während eines Schaltvorgangs des Getriebes 4 ist die hierzu beschriebene Kompensation durch die For a better connection of the torque during a switching operation of the transmission 4, the compensation described by the
Elektromaschine 3 ebenfalls vorteilhaft, weil die kurzzeitige  Electric machine 3 also advantageous because the short-term
Kraftschlussunterbrechung des Getriebes 4 während des Schaltvorgangs überbrückt wird. Dadurch kann das Drehmoment der Antriebsvorrichtung 1 auch während des Schaltvorgangs auf einem höheren Niveau gehalten werden, das die Anbindung der nächsten Getriebeübersetzung verbessert und Rückschaltungen vermeidet. Der Vorteil in einer zusätzlichen Drehmomentunterstützung durch die Elektromaschine 3 in Abhängigkeit eines Gangwechsels, ist die Vermeidung des Zugkraftverlustes und die Vermeidung eines Rückschaltens, da heißt ein höherer Gang kann durch den elektrischen Zusatzantrieb länger genutzt werden. Traction interruption of the transmission 4 is bridged during the switching operation. As a result, the torque of the drive device 1 can also be kept at a higher level during the switching process, which improves the connection of the next gear ratio and Avoid downshifts. The advantage in an additional torque assistance by the electric machine 3 as a function of a gear change, is the avoidance of traction loss and the avoidance of a downshift, since a higher gear can be used longer by the electric auxiliary drive.
Bei einer Anforderung eines Gangwechsels zur Rückschaltung, also In a request for a gear change to the downshift, ie
beispielsweise vom dritten Gang in den zweiten Gang, wird vorteilhafterweise geprüft, ob diese Rückschaltung durch das Erzeugen eines Zusatzdrehmoments durch die Elektromaschine 3 vermieden werden kann. Umgekehrt ist die erforderliche elektrische Zusatzleistung bei einer Hochschaltung zu bestimmen, um den verzögerten Ladedruckaufbau optimal zu kompensieren. For example, from third gear to second gear, it is advantageously checked whether this downshift can be avoided by generating an additional torque by the electric machine 3. Conversely, the required additional electrical power at an upshift is to be determined in order to optimally compensate the delayed charge pressure build-up.
Figur 3 zeigt hierzu beispielsweise die von der Elektromaschine 3 zur Verfügung zu stellende Zusatzleistung P beziehungsweise das zur Verfügung zu stellende Zusatzdrehmoment in Abhängigkeit von unterschiedlichen Gangwechseln G zwischen den Gängen 1, 2, 3, 4 und 5 des Getriebes 4. For this purpose, FIG. 3 shows, for example, the additional power P to be provided by the electric machine 3 or the additional torque to be made available as a function of different gear changes G between the gears 1, 2, 3, 4 and 5 of the transmission 4.

Claims

Ansprüche claims
1. Verfahren zum Betreiben einer Antriebsvorrichtung (1) eines Kraftfahrzeugs, die einen Verbrennungsmotor (2) mit einem ersten Abgasturbolader (5) und einem zweiten Abgasturbolader (6) und wenigstens eine Elektromaschine (3) aufweist, wobei die Abgasturbolader (5,6) in Reihe geschaltet sind, wobei zumindest der zweite Abgasturbolader (6) Mittel zum Variieren seiner Leistung aufweist, und wobei die Leistung zumindest des zweiten 1. A method for operating a drive device (1) of a motor vehicle having an internal combustion engine (2) with a first exhaust gas turbocharger (5) and a second exhaust gas turbocharger (6) and at least one electric machine (3), wherein the exhaust gas turbocharger (5,6) are connected in series, wherein at least the second exhaust gas turbocharger (6) has means for varying its power, and wherein the power of at least the second
Abgasturboladers (6) in Abhängigkeit von einem angeforderten Soll- Drehmoment der Antriebsvorrichtung (1) variiert wird, dadurch  Exhaust gas turbocharger (6) is varied in response to a requested target torque of the drive device (1), characterized
gekennzeichnet, dass die Elektromaschine (3) in Abhängigkeit von dem Zeitpunkt der Variierung angesteuert wird, um eine Abweichung eines Ist- Drehmoments der Antriebsvorrichtung (1) von dem Soll-Drehmoment zu kompensieren.  characterized in that the electric machine (3) is driven in response to the timing of the variation to compensate for a deviation of an actual torque of the drive device (1) from the target torque.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Leistung des zweiten Abgasturboladers (6) derart variiert wird, dass bei Überschreiten eines ersten Grenzwertes durch das angeforderte Soll-Drehmoment die Leistung des zweiten Abgasturboladers (6) erhöht wird. 2. The method according to claim 1, characterized in that the power of the second exhaust gas turbocharger (6) is varied such that when a first limit value is exceeded by the requested desired torque, the power of the second exhaust gas turbocharger (6) is increased.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch 3. The method according to any one of the preceding claims, characterized
gekennzeichnet, dass die Leistung des zweiten Abgasturboladers (6) derart variiert wird, dass der zweite Abgasturbolader (6) erst bei Überschreiten des ersten Grenzwertes hinzugeschaltet wird.  in that the power of the second exhaust-gas turbocharger (6) is varied in such a way that the second exhaust-gas turbocharger (6) is connected only when the first limit value is exceeded.
4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch 4. The method according to any one of the preceding claims, characterized
gekennzeichnet, dass der erste Abgasturbolader (5) Mittel zum Variieren seiner Leistung aufweist, wobei die Leistung des ersten Abgasturboladers (5) in Abhängigkeit von dem angeforderten Soll-Drehmoment variiert wird.  in that the first exhaust-gas turbocharger (5) has means for varying its power, the power of the first exhaust-gas turbocharger (5) being varied as a function of the requested setpoint torque.
5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch 5. The method according to any one of the preceding claims, characterized
gekennzeichnet, dass die aktuelle Ist-Drehzahl zumindest des zweiten Abgasturboladers (6) erfasst wird, und dass der Zeitpunkt der Variierung in Abhängigkeit von der erfassten Ist-Drehzahl bestimmt wird. characterized in that the current actual speed of at least the second Exhaust gas turbocharger (6) is detected, and that the timing of the variation in dependence on the detected actual speed is determined.
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch 6. The method according to any one of the preceding claims, characterized
gekennzeichnet, dass ein Betätigungsistzustand der Mittel zumindest des zweiten Abgasturboladers (6) überwacht und der Zeitpunkt der Variierung in Abhängigkeit von dem Betätigungsistzustand bestimmt wird.  characterized in that an actuation state of the means of at least the second exhaust gas turbocharger (6) is monitored and the time of the variation is determined in dependence on the actuation actual state.
7. Verfahren nach einem der vorhergehenden Ansprüche, dadurch 7. The method according to any one of the preceding claims, characterized
gekennzeichnet, dass die Ansteuerung der Elektromaschine (3)  characterized in that the control of the electric machine (3)
insbesondere in Abhängigkeit von einer Hysterese beendet wird, wenn die Ist-Drehzahl und/oder der Betätigungsistzustand einer Soll-Drehzahl beziehungsweise einem Betätigungssollzustand entsprechen.  is terminated in particular in response to a hysteresis, when the actual speed and / or the Betätigungsistzustand a desired speed or an operating target state correspond.
8. Verfahren nach einem der vorhergehenden Ansprüche, dadurch 8. The method according to any one of the preceding claims, characterized
gekennzeichnet, dass die Elektromaschine (3) in Abhängigkeit von einem angeforderten Gangwechsel angesteuert wird.  in that the electric machine (3) is activated as a function of a requested gear change.
9. Vorrichtung zum Betreiben einer Antriebsvorrichtung eines Kraftfahrzeus, die einen Verbrennungsmotor (2) mit einem ersten Abgasturbolader (5) und einem zweiten Abgasturbolader (6) und wenigstens eine Elektromaschine (3) aufweist, wobei die Abgasturbolader (5,6) in Reihe geschaltet sind, und wobei zumindest der zweite Abgasturbolader (6) Mittel zum Variieren seiner Leistung aufweist, gekennzeichnet durch ein speziell hergerichtetes 9. An apparatus for operating a drive device of a motor vehicle having an internal combustion engine (2) with a first exhaust gas turbocharger (5) and a second exhaust gas turbocharger (6) and at least one electric machine (3), wherein the exhaust gas turbocharger (5,6) connected in series are, and wherein at least the second exhaust gas turbocharger (6) comprises means for varying its power, characterized by a specially prepared
Steuergerät, das bei bestimmungsgemäßem Gebrauch das Verfahren nach einem der Ansprüche 1 bis 8 durchführt.  Control device that carries out the method according to one of claims 1 to 8 when used as intended.
10. Antriebsvorrichtung (1) für ein Kraftfahrzeug, mit einem Verbrennungsmotor (2), der einen ersten Abgasturbolader (5) und einen zweiten Abgasturbolader (6) aufweist, und mit einer Elektromaschine (3), wobei die Abgasturbolader (5,6) in Reihe geschaltet sind, und wobei zumindest der zweite 10. Drive device (1) for a motor vehicle, with an internal combustion engine (2) having a first exhaust gas turbocharger (5) and a second exhaust gas turbocharger (6), and with an electric machine (3), wherein the exhaust gas turbocharger (5,6) in Row are connected, and wherein at least the second
Abgasturbolader (6) Mittel zum Variieren seiner Leistung aufweist,  Exhaust gas turbocharger (6) has means for varying its power,
gekennzeichnet durch eine Vorrichtung nach Anspruch 9.  characterized by a device according to claim 9.
EP16760059.2A 2015-10-07 2016-09-01 Method and device for operating a drive device, and drive device Withdrawn EP3359792A1 (en)

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DE102015219337.3A DE102015219337A1 (en) 2015-10-07 2015-10-07 Method and device for operating a drive device, drive device
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