EP2271533A2 - Calibrating an internal combustion engine - Google Patents

Calibrating an internal combustion engine

Info

Publication number
EP2271533A2
EP2271533A2 EP08873640A EP08873640A EP2271533A2 EP 2271533 A2 EP2271533 A2 EP 2271533A2 EP 08873640 A EP08873640 A EP 08873640A EP 08873640 A EP08873640 A EP 08873640A EP 2271533 A2 EP2271533 A2 EP 2271533A2
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
torque
motor vehicle
engine
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Withdrawn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
EP08873640A
Other languages
German (de)
French (fr)
Inventor
Bernd Doerr
Roland Schleser
Holger Niemann
Daniel Damm
Andreas Heyl
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 EP2271533A2 publication Critical patent/EP2271533A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/44—Drive Train control parameters related to combustion engines
    • B60L2240/441—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/44—Drive Train control parameters related to combustion engines
    • B60L2240/443—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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—Engine speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0657—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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/081—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/083—Torque
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the invention relates to a method for determining the torque of an internal combustion engine for a motor vehicle, in particular the internal combustion engine of a motor vehicle hybrid drive device, with the aid of at least one coupled to the internal combustion engine secondary machine, in particular an electric machine.
  • the invention is therefore based on the object to provide a method for determining the torque of an internal combustion engine, in particular the internal combustion engine of a motor vehicle hybrid drive device, which allows over the prior art, a much more accurate determination of the instantaneous torque.
  • a method is proposed in which the internal combustion engine is coupled to at least one secondary machine, in particular an electric machine or pneumatic machine, and the instantaneous torque of the internal combustion engine is determined in at least one operating point by comparison with the known torque of the secondary machine. It is assumed that the torque of the secondary machine is known. This is justified, in particular, for an electric machine, since the momentary torque for these can be determined from parameters which are easy to access, such as flowing current and rotational speed. Since, as described above, the instantaneous torque of the secondary machine, in particular the electric machine, is known, a comparison between internal combustion engine and secondary machine brings a clear improvement in the determination of the instantaneous torque.
  • the internal combustion engine is coupled to the secondary machine via a separating clutch, in particular an electric clutch.
  • a separating clutch in particular an electric clutch.
  • the internal combustion engine and the secondary engine are decoupled during the torque determination of a drive train of the motor vehicle.
  • This decoupling makes it possible to exclude the torque determination of the internal combustion engine to the exclusion of external influences, in particular loads due to driving of the motor vehicle. If the drive device with internal combustion engine and secondary engine is not decoupled from the drive train of the motor vehicle, then during the
  • a development of the invention provides that the secondary engine generates a torque which is opposite to that of the internal combustion engine.
  • the internal combustion engine is used here as a drive machine, a certain operating point, in particular a certain speed, set and used the secondary machine as a braking machine. From data which can be tapped on the secondary machine, in the case of an electric machine speed and flowing current, the currently applied torque can now be determined in a simple manner from the characteristic map of the secondary machine. From the direct coupling between internal combustion engine and Secondary machine is thus also the torque currently generated by the internal combustion engine known.
  • a development of the method according to the invention provides that the torque is determined within a speed range.
  • various operating points, in particular rotational speeds, are set and a determination of the instantaneous torque of
  • a development of the invention provides that the speed range is automatically traversed by means of a control device.
  • automating the torque measurement process a large number of operating points can be reached in less time than is possible manually.
  • the creation of a complete internal combustion engine map can be carried out without external intervention in a short time.
  • the data relating to the determination of the torque are stored in a memory. Accordingly, the creation of a complete combustion engine map can be sequential, which means that different operating points are approached at different times, in particular over a further period extending times. As time progresses, the map of the internal combustion engine is thus gradually added. Furthermore, the data already in the memory for comparison, in particular for the plausibility check, of the currently determined torque can be used.
  • a further development of the invention provides that the data is used to update basic engine data stored in an engine control unit.
  • the basic engine data for example, according to the prior art, so by measuring a small number of Internal combustion engines, carried out and deposited in the engine control unit.
  • the engine data necessary for engine control are set from the basic engine data available in the delivery state to the actual internal combustion engine , By adapting the stored motor data to the actually existing one
  • the engine control unit can adjust better to the present driving situation, whereby the driving behavior of the vehicle is improved.
  • An advantageous development of the invention provides that an influence of the internal combustion engine, in particular by disturbances, is detected by the determination of the torque.
  • This interference is detected by comparing the currently measured torque with the data stored in the memory or in the engine control unit, in particular data already updated on the basis of previous measurements. If the currently determined torque data are not within a certain tolerance range relative to the stored data, then it can be assumed that there is an influence, in particular a fault, on the internal combustion engine. In this way, damage to the internal combustion engine in particular can be detected early, so that measures can be taken in good time before further damage occurs.
  • the determination of the torque of the internal combustion engine in the stationary state, in particular on a test bench, and / or while driving the motor vehicle is performed.
  • determining the torque in the steady state for example, as a calibration step of the internal combustion engine before installation in a motor vehicle, before delivery of the motor vehicle or as part of a maintenance of the motor vehicle, is advantageously the Torque within a speed range, in particular by means of a control device according to the preceding embodiments determined.
  • the engine data can be adapted to the actual behavior of the internal combustion engine.
  • the determination of the torque during driving of the motor vehicle can be performed. In order to make the actual driving operation without interruption, it is possible to use the service life of the motor vehicle for setting individual operating points and to carry out a torque measurement.
  • the invention relates to a hybrid drive device, in particular a motor vehicle, comprising at least two different drive units, in particular an electric machine and an internal combustion engine, with a device for determining the torque of the internal combustion engine, according to the method according to the above.
  • the figure shows a schematic representation of an embodiment of the invention.
  • a hybrid drive device 1 is shown for a motor vehicle, not shown.
  • the hybrid drive device 1 has an internal combustion engine 2 and an electric machine 3, which are coupled to one another via a torque transmission device 4 and a separating clutch 5.
  • the other systems of the motor vehicle in particular the drive system, is connected to the electric machine 3 via a further torque transmission device 6, a further separating clutch 7 and a transmission 8. Due to this structure is a complete separation of the hybrid drive device 1 of the other systems of the motor vehicle and thus one, with an open clutch 7, uninfluenced determination of the torque of the internal combustion engine 2 by means of the electric machine. 3 possible.
  • the disconnect clutch 5 is open and the disconnect clutch 7 is closed, a driving operation driven exclusively by the electric machine is possible; If both separating clutches 5 and 7 are closed, then the motor vehicle is driven both by the internal combustion engine 2 and by the electric machine 3.
  • the separating clutch 7 is opened, so that the hybrid drive device is completely decoupled from the other systems of the motor vehicle. Furthermore, a connection between the internal combustion engine 2 and the secondary engine 3 via the torque transmission device 4 by closing the clutch 5 is made.
  • the internal combustion engine 2 is set to an operating point, in particular a rotational speed, by an engine control unit (not shown).
  • the secondary machine 3 is used as a braking machine and the operating parameters of the secondary machine 2, in the case of an electric machine, for example, speed and flowing current, read out. From this data, the current torque of the internal combustion engine 2 can be determined in sequence. In another embodiment, by an unrepresented
  • Engine control unit several operating points in time sequentially approached, determines the respective applied torque and stored in the engine control unit or a memory, also not shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The invention relates to a method for determining the torque of an internal combustion engine (2) for a motor vehicle, in particular the internal combustion engine (2) of a motor vehicle hybrid drive device (1), by means of a secondary motor (3) coupled to the internal combustion engine (2), in particular an electric motor. According to the invention, the torque of the internal combustion engine (2) is determined at at least one operating point by comparison with the known torque of the secondary motor (2).

Description

Beschreibung description
Titel Kalibrierung eines VerbrennungsmotorsTitle Calibration of an internal combustion engine
Die Erfindung betrifft ein Verfahren zur Bestimmung des Drehmoments einer Verbrennungskraftmaschine für ein Kraftfahrzeug, insbesondere der Verbrennungskraftmaschine einer Kraftfahrzeug-Hybridantriebsvorrichtung, mit Hilfe mindestens einer an die Verbrennungskraftmaschine gekoppelten Sekundärmaschine, insbesondere einer Elektromaschine.The invention relates to a method for determining the torque of an internal combustion engine for a motor vehicle, in particular the internal combustion engine of a motor vehicle hybrid drive device, with the aid of at least one coupled to the internal combustion engine secondary machine, in particular an electric machine.
Bei Kraftfahrzeugen mit einer elektronischen Motorsteuerung ist die Bestimmung des momentanen Drehmoments der Verbrennungskraftmaschine von besonderer Bedeutung, da dieser Wert eine Regelungsgröße der Verbrennungskraftmaschine ist und damit einen starken Einfluss auf das Fahrverhalten des Kraftfahrzeugs hat.In motor vehicles with an electronic engine control the determination of the instantaneous torque of the internal combustion engine is of particular importance, since this value is a control variable of the internal combustion engine and thus has a strong influence on the driving behavior of the motor vehicle.
Stand der TechnikState of the art
Es ist Stand der Technik, dass während der Entwicklung eines Kraftfahrzeugs die Drehmoment-Kennfelder einer kleinen Anzahl von Verbrennungskraftmaschinen vermessen werden. Ausgehend von diesen Daten wird auf das Kennfeld aller Verbrennungskraftmaschinen einer gesamten Serie geschlossen. Allerdings kommt es häufig durch Fertigungstoleranzen während der Produktion der Verbrennungskraftmaschinen zu Abweichungen zwischen dem tatsächlichen momentan anliegenden Drehmoment sowie dem von dem Regelungskreislauf der Verbrennungskraftmaschine vorgegebenen Drehmoment. Diese Abweichungen wirken sich negativ auf das Fahrverhalten desIt is state of the art that during the development of a motor vehicle, the torque maps of a small number of internal combustion engines are measured. Based on these data, the map of all internal combustion engines of an entire series is concluded. However, manufacturing tolerances during production of the internal combustion engines often result in deviations between the actual momentarily applied torque and the torque predetermined by the control circuit of the internal combustion engine. These deviations have a negative effect on the driving behavior of the driver
Kraftfahrzeugs aus. Ist in dem Antriebssystem des Kraftfahrzeugs neben der Verbrennungskraftmaschine eine weitere an die Verbrennungskraftmaschine gekoppelte Sekundärmaschine, insbesondere eine Elektromaschine in einer Kraftfahrzeug-Hybridantriebsvorrichtung, vorgesehen, so werden die Drehmomentkennfelder für die Verbrennungskraftmaschine und die Sekundärmaschine getrennt voneinander aufgenommen, womit sich eventuell vorhandene Fehler im Drehmomentkennfeld, insbesondere des Drehmomentkennfelds der Verbrennungskraftmaschine, aufsummieren. Grundsätzlich kann allerdings das momentane Drehmoment einer Elektromaschine aus vorliegenden Kenngrößen, insbesondere Drehzahl und fließendem Strom, deutlich genauer bestimmt werden als für eine Verbrennungskraftmaschine.Motor vehicle off. Is in the drive system of the motor vehicle in addition to the internal combustion engine, a further coupled to the internal combustion engine secondary engine, in particular an electric machine in a motor vehicle hybrid drive device, provided, the torque maps for the internal combustion engine and the Secondary machine recorded separately from each other, which may sum up any existing errors in the torque map, in particular the torque map of the internal combustion engine. In principle, however, the instantaneous torque of an electric machine can be determined much more accurately from present parameters, in particular rotational speed and flowing current, than for an internal combustion engine.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zur Bestimmung des Drehmoments einer Verbrennungskraftmaschine, insbesondere der Verbrennungskraftmaschine einer Kraftfahrzeug-Hybridantriebsvorrichtung, bereitzustellen, das gegenüber dem Stand der Technik eine deutlich genauere Bestimmung des momentanen Drehmoments erlaubt.The invention is therefore based on the object to provide a method for determining the torque of an internal combustion engine, in particular the internal combustion engine of a motor vehicle hybrid drive device, which allows over the prior art, a much more accurate determination of the instantaneous torque.
Offenbarung der ErfindungDisclosure of the invention
Hierzu wird ein Verfahren vorgeschlagen, bei dem die Verbrennungskraftmaschine an mindestens eine Sekundärmaschine, insbesondere eine Elektromaschine oder pneumatische Maschine, gekoppelt ist und das momentane Drehmoment der Verbrennungskraftmaschine in mindestens einem Betriebspunkt durch Vergleich mit dem bekannten Drehmoment der Sekundärmaschine bestimmt wird. Dabei wird unterstellt, dass das Drehmoment der Sekundärmaschine bekannt ist. Dies ist insbesondere für eine Elektromaschine gerechtfertigt, da für diese das momentane Drehmoment aus einfach abzugreifenden Kenngrößen wie fließendem Strom und Drehzahl bestimmt werden kann. Da somit beschreibungsgemäß das momentane Drehmoment der Sekundärmaschine, insbesondere Elektromaschine, bekannt ist, bringt ein Abgleich zwischen Verbrennungskraftmaschine und Sekundärmaschine eine deutliche Verbesserung in der Bestimmung des momentanen Drehmoments. Neben der erhöhten Genauigkeit in der Bestimmung des absoluten momentanen Drehmoments der Verbrennungskraftmaschine wird durch die beschriebene Vorgehensweise auch die relative Abweichung in der Drehmomentbestimmung zwischen Verbrennungskraftmaschine und Sekundärmaschine verkleinert. Nach einer Weiterbildung der Erfindung ist vorgesehen, dass die Verbrennungskraftmaschine über eine Trennkupplung, insbesondere elektrische Schaltkupplung, mit der Sekundärmaschine gekoppelt ist. Dies erlaubt die Fortbewegung des Kraftfahrzeugs auch bei niedrigen Drehzahlen der Antriebsvorrichtung, bei denen die Sekundärmaschine üblicherweise ein höheres Drehmoment aufweist als eine Verbrennungskraftmaschine. Bei höheren Drehzahlen, insbesondere in höheren Lastbereichen, wird die Trennkupplung zwischen Verbrennungskraftmaschine und Sekundärmaschine geschlossen, sodass ein kombinierter Betrieb ermöglicht wird. Die Trennkupplung muss sich auch im geschlossenen Zustand befinden, um die Drehmomentbestimmung gemäß den vorhergehenden Ausführungen vorzunehmen.For this purpose, a method is proposed in which the internal combustion engine is coupled to at least one secondary machine, in particular an electric machine or pneumatic machine, and the instantaneous torque of the internal combustion engine is determined in at least one operating point by comparison with the known torque of the secondary machine. It is assumed that the torque of the secondary machine is known. This is justified, in particular, for an electric machine, since the momentary torque for these can be determined from parameters which are easy to access, such as flowing current and rotational speed. Since, as described above, the instantaneous torque of the secondary machine, in particular the electric machine, is known, a comparison between internal combustion engine and secondary machine brings a clear improvement in the determination of the instantaneous torque. In addition to the increased accuracy in the determination of the absolute instantaneous torque of the internal combustion engine is reduced by the described procedure, the relative deviation in the torque determination between the internal combustion engine and secondary engine. According to a development of the invention, it is provided that the internal combustion engine is coupled to the secondary machine via a separating clutch, in particular an electric clutch. This allows the movement of the motor vehicle even at low speeds of the drive device, in which the secondary machine usually has a higher torque than an internal combustion engine. At higher speeds, especially in higher load ranges, the clutch between the internal combustion engine and secondary engine is closed, so that a combined operation is possible. The separating clutch must also be in the closed state in order to carry out the torque determination according to the preceding statements.
In vorteilhafter Weiterbildung der Erfindung sind die Verbrennungskraftmaschine und die Sekundärmaschine während der Drehmomentbestimmung von einem Antriebsstrang des Kraftfahrzeugs entkoppelt. Diese Entkoppelung erlaubt es, die Drehmomentbestimmung der Verbrennungskraftmaschine unter Ausschluss äußerer Einflüsse, insbesondere Belastungen durch Fahrbetrieb des Kraftfahrzeugs, auszuschließen. Wird die Antriebsvorrichtung mit Verbrennungskraftmaschine und Sekundärmaschine nicht von dem Antriebsstrang des Kraftfahrzeugs entkoppelt, so muss während derIn an advantageous embodiment of the invention, the internal combustion engine and the secondary engine are decoupled during the torque determination of a drive train of the motor vehicle. This decoupling makes it possible to exclude the torque determination of the internal combustion engine to the exclusion of external influences, in particular loads due to driving of the motor vehicle. If the drive device with internal combustion engine and secondary engine is not decoupled from the drive train of the motor vehicle, then during the
Bestimmung des Drehmoments die zum Betrieb, insbesondere Fahrbetrieb, notwendige, nach außen abgeführte Leistung bestimmt werden. Dies kann nicht immer mit ausreichender Genauigkeit ausgeführt werden, woraus sich wiederum Fehler in der Drehmomentbestimmung der Verbrennungskraftmaschine ergeben.Determination of the torque required for operation, in particular driving, necessary, outward dissipated power are determined. This can not always be done with sufficient accuracy, which in turn results in errors in the torque determination of the internal combustion engine.
Eine Weiterbildung der Erfindung sieht vor, dass die Sekundärmaschine ein Drehmoment erzeugt, welches dem der Verbrennungskraftmaschine entgegengerichtet ist. In den meisten Fällen wird hier die Verbrennungskraftmaschine als Antriebsmaschine verwendet, ein bestimmter Betriebspunkt, insbesondere eine bestimmte Drehzahl, eingestellt und die Sekundärmaschine als Bremsmaschine verwendet. Aus an der Sekundärmaschine abgreifbaren Daten, im Fall einer Elektromaschine Drehzahl und fließendem Strom, kann nun aus dem Kennfeld der Sekundärmaschine auf einfache Weise das momentan anliegende Drehmoment bestimmt werden. Aus der direkten Kopplung zwischen Verbrennungskraftmaschine und Sekundärmaschine ist somit auch das momentan von der Verbrennungskraftmaschine erzeugte Drehmoment bekannt.A development of the invention provides that the secondary engine generates a torque which is opposite to that of the internal combustion engine. In most cases, the internal combustion engine is used here as a drive machine, a certain operating point, in particular a certain speed, set and used the secondary machine as a braking machine. From data which can be tapped on the secondary machine, in the case of an electric machine speed and flowing current, the currently applied torque can now be determined in a simple manner from the characteristic map of the secondary machine. From the direct coupling between internal combustion engine and Secondary machine is thus also the torque currently generated by the internal combustion engine known.
Eine Weiterbildung des erfindungsgemäßen Verfahrens sieht vor, dass die Drehmomentbestimmung innerhalb eines Drehzahlbereichs erfolgt. Dabei werden verschiedene Betriebspunkte, insbesondere Drehzahlen, eingestellt und eine Bestimmung des momentanen Drehmoments derA development of the method according to the invention provides that the torque is determined within a speed range. In this case, various operating points, in particular rotational speeds, are set and a determination of the instantaneous torque of
Verbrennungskraftmaschine gemäß den vorherigen Ausführungen durchgeführt. Erfolgt die Drehmomentbestimmung mit ausreichender Anzahl an Messpunkten innerhalb eines ausreichend großen Drehzahlbereichs, so ergibt sich ein Kennfeld der Verbrennungskraftmaschine.Internal combustion engine carried out according to the previous versions. If the torque determination takes place with a sufficient number of measuring points within a sufficiently large rpm range, the result is a characteristic diagram of the internal combustion engine.
Eine Weiterbildung der Erfindung sieht vor, dass der Drehzahlbereich automatisch mit Hilfe einer regelungstechnischen Vorrichtung durchfahren wird. Durch die Automatisierung des Drehmoment-Messverfahrens können in kürzerer Zeit, als dies manuell möglich ist, eine große Anzahl Betriebspunkte angefahren werden. Insbesondere kann die Erstellung eines vollständigen Verbrennungskraftmaschinen-Kennfelds ohne Eingriffe von außen in kurzer Zeit durchgeführt werden.A development of the invention provides that the speed range is automatically traversed by means of a control device. By automating the torque measurement process, a large number of operating points can be reached in less time than is possible manually. In particular, the creation of a complete internal combustion engine map can be carried out without external intervention in a short time.
In einer weiteren vorteilhaften Weiterbildung der Erfindung werden die die Drehmomentbestimmung betreffenden Daten in einem Speicher hinterlegt. Demnach kann die Erstellung eines kompletten Verbrennungskraftmaschinen- Kennfelds sequentiell erfolgen, was bedeutet, dass verschiedene Betriebspunkte zu verschiedenen Zeitpunkten, insbesondere sich über einen weiteren Zeitraum erstreckende Zeitpunkte, angefahren werden. Mit fortschreitender Zeit wird folglich das Kennfeld der Verbrennungskraftmaschine schrittweise ergänzt. Weiterhin können die bereits im Speicher befindlichen Daten zum Vergleich, insbesondere zur Plausibilitätsprüfung, des aktuell bestimmten Drehmoments herangezogen werden.In a further advantageous development of the invention, the data relating to the determination of the torque are stored in a memory. Accordingly, the creation of a complete combustion engine map can be sequential, which means that different operating points are approached at different times, in particular over a further period extending times. As time progresses, the map of the internal combustion engine is thus gradually added. Furthermore, the data already in the memory for comparison, in particular for the plausibility check, of the currently determined torque can be used.
Eine Weiterbildung der Erfindung sieht vor, dass die Daten zur Aktualisierung von in einem Motorsteuerungsgerät hinterlegten Grundmotordaten verwendet werden. Die Grundmotordaten können beispielsweise nach dem Stand der Technik, also durch Messung an einer kleinen Anzahl von Verbrennungskraftmaschinen, erfolgen und im Motorsteuerungsgerät hinterlegt werden. Durch die erfindungsgemäße Aktualisierung der in dem Motorsteuerungsgerät befindlichen Grundmotordaten aus aktuellen Drehmomentmessungen, beispielsweise durch die Drehmomentsbestimmung innerhalb eines Drehzahlbereiches oder dem sequentiellen Einstellen einzelner Verbrennungskraftmaschinenbetriebspunkte gemäß den vorhergehenden Ausführungen, werden die zur Motorsteuerung notwendigen Motordaten von den im Auslieferungszustand vorhandenen Grundmotordaten auf die tatsächlich vorhandene Verbrennungskraftmaschine eingestellt. Durch das Anpassen der hinterlegten Motordaten auf die tatsächlich vorhandeneA further development of the invention provides that the data is used to update basic engine data stored in an engine control unit. The basic engine data, for example, according to the prior art, so by measuring a small number of Internal combustion engines, carried out and deposited in the engine control unit. As a result of the inventive updating of the basic engine data contained in the engine control unit from current torque measurements, for example by determining the torque within a speed range or the sequential setting of individual internal combustion engine operating points according to the preceding embodiments, the engine data necessary for engine control are set from the basic engine data available in the delivery state to the actual internal combustion engine , By adapting the stored motor data to the actually existing one
Verbrennungskraftmaschine kann sich folglich das Motorsteuerungsgerät besser auf die vorliegende Fahrsituation einstellen, womit das Fahrverhalten des Fahrzeugs verbessert wird.Internal combustion engine, therefore, the engine control unit can adjust better to the present driving situation, whereby the driving behavior of the vehicle is improved.
Eine vorteilhafte Weiterbildung der Erfindung sieht vor, dass eine Beeinflussung der Verbrennungskraftmaschine, insbesondere durch Störungen, durch die Bestimmung des Drehmoments detektiert wird. Diese Detektion von Beeinflussungen erfolgt durch Vergleich des aktuell gemessenen Drehmoments mit den in dem Speicher beziehungsweise in dem Motorsteuerungsgerät hinterlegten Daten, insbesondere bereits aufgrund früherer Messungen aktualisierten Daten. Liegen die aktuell bestimmten Drehmomentdaten nicht innerhalb eines gewissen Toleranzbereichs zu den hinterlegten Daten, so kann davon ausgegangen werden, dass eine Beeinflussung, insbesondere eine Störung, der Verbrennungskraftmaschine vorliegt. Auf diese Weise können insbesondere auch Schäden an der Verbrennungskraftmaschine frühzeitig erkannt werden, sodass rechtzeitig Maßnahmen ergriffen werden können, bevor weitere Schäden auftreten.An advantageous development of the invention provides that an influence of the internal combustion engine, in particular by disturbances, is detected by the determination of the torque. This interference is detected by comparing the currently measured torque with the data stored in the memory or in the engine control unit, in particular data already updated on the basis of previous measurements. If the currently determined torque data are not within a certain tolerance range relative to the stored data, then it can be assumed that there is an influence, in particular a fault, on the internal combustion engine. In this way, damage to the internal combustion engine in particular can be detected early, so that measures can be taken in good time before further damage occurs.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass die Bestimmung des Drehmoments der Verbrennungskraftmaschine im stationären Zustand, insbesondere auf einem Prüfstand, und/oder im Fahrbetrieb des Kraftfahrzeugs, durchgeführt wird. Bei Bestimmung des Drehmoments im stationären Zustand, beispielsweise als Kalibrierungsschritt der Verbrennungskraftmaschine vor Einbau in ein Kraftfahrzeug, vor Auslieferung des Kraftfahrzeugs oder im Rahmen einer Wartung des Kraftfahrzeugs, wird vorteilhafterweise das Drehmoment innerhalb eines Drehzahlbereiches, insbesondere mit Hilfe einer regelungstechnischen Vorrichtung gemäß den vorhergegangenen Ausführungen, bestimmt. Auf diese Weise können die Motordaten auf das tatsächliche Verhalten der Verbrennungskraftmaschine angepasst werden. Es ist auch vorgesehen, dass die Bestimmung des Drehmoments im Fahrbetrieb des Kraftfahrzeugs durchgeführt werden kann. Um den eigentlichen Fahrbetrieb unterbrechungsfrei zu gestalten, ist es möglich, Standzeiten des Kraftfahrzeugs zum Einstellen einzelner Betriebspunkte zu nutzen und eine Drehmomentsmessung durchzuführen.According to a development of the invention it is provided that the determination of the torque of the internal combustion engine in the stationary state, in particular on a test bench, and / or while driving the motor vehicle, is performed. When determining the torque in the steady state, for example, as a calibration step of the internal combustion engine before installation in a motor vehicle, before delivery of the motor vehicle or as part of a maintenance of the motor vehicle, is advantageously the Torque within a speed range, in particular by means of a control device according to the preceding embodiments determined. In this way, the engine data can be adapted to the actual behavior of the internal combustion engine. It is also envisaged that the determination of the torque during driving of the motor vehicle can be performed. In order to make the actual driving operation without interruption, it is possible to use the service life of the motor vehicle for setting individual operating points and to carry out a torque measurement.
Ferner betrifft die Erfindung eine Hybridantriebsvorrichtung, insbesondere eines Kraftfahrzeugs, die zumindest zwei unterschiedliche Antriebsaggregate, insbesondere eine elektrische Maschine und eine Verbrennungskraftmaschine, aufweist, mit einer Vorrichtung zur Bestimmung des Drehmoments der Verbrennungskraftmaschine, nach dem Verfahren gemäß vorstehender Ausführungen.Furthermore, the invention relates to a hybrid drive device, in particular a motor vehicle, comprising at least two different drive units, in particular an electric machine and an internal combustion engine, with a device for determining the torque of the internal combustion engine, according to the method according to the above.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Figur zeigt eine schematische Darstellung eines Ausführungsbeispiels der Erfindung.The figure shows a schematic representation of an embodiment of the invention.
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
In der Figur ist eine Hybridantriebsvorrichtung 1 für ein nicht abgebildetes Kraftfahrzeug dargestellt. Die Hybridantriebsvorrichtung 1 weist eine Verbrennungskraftmaschine 2 und eine Elektromaschine 3 auf, die über eine Drehmomentübertragungsvorrichtung 4 sowie eine Trennkupplung 5 miteinander gekoppelt sind. Die weiteren Systeme des Kraftfahrzeugs, insbesondere das Antriebssystem, ist über eine weitere Drehmomentübertragungsvorrichtung 6, eine weitere Trennkupplung 7 sowie einem Getriebe 8 an die Elektromaschine 3 angeschlossen. Bedingt durch diesen Aufbau ist eine vollständige Trennung der Hybridantriebsvorrichtung 1 von den weiteren Systemen des Kraftfahrzeugs und damit eine, bei offener Trennkupplung 7, unbeeinflusste Bestimmung des Drehmoments der Verbrennungskraftmaschine 2 mit Hilfe der Elektromaschine 3 möglich. Ebenso ist bei geöffneter Trennkupplung 5 und geschlossener Trennkupplung 7 ein Fahrbetrieb ausschließlich von der Elektromaschine angetrieben möglich; sind beide Trennkupplungen 5 und 7 geschlossen, so wird das Kraftfahrzeug sowohl von der Verbrennungskraftmaschine 2 als auch von der Elektromaschine 3 angetrieben.In the figure, a hybrid drive device 1 is shown for a motor vehicle, not shown. The hybrid drive device 1 has an internal combustion engine 2 and an electric machine 3, which are coupled to one another via a torque transmission device 4 and a separating clutch 5. The other systems of the motor vehicle, in particular the drive system, is connected to the electric machine 3 via a further torque transmission device 6, a further separating clutch 7 and a transmission 8. Due to this structure is a complete separation of the hybrid drive device 1 of the other systems of the motor vehicle and thus one, with an open clutch 7, uninfluenced determination of the torque of the internal combustion engine 2 by means of the electric machine. 3 possible. Likewise, when the disconnect clutch 5 is open and the disconnect clutch 7 is closed, a driving operation driven exclusively by the electric machine is possible; If both separating clutches 5 and 7 are closed, then the motor vehicle is driven both by the internal combustion engine 2 and by the electric machine 3.
Die Messung des aktuellen Drehmoments wird wie nachstehend beschrieben durchgeführt. Zunächst wird die Trennkupplung 7 geöffnet, sodass die Hybridantriebsvorrichtung vollständig von den weiteren Systemen des Kraftfahrzeugs entkoppelt ist. Weiterhin wird eine Verbindung zwischen Verbrennungskraftmaschine 2 und Sekundärmaschine 3 über die Drehmomentübertragungsvorrichtung 4 durch Schließen der Trennkupplung 5 hergestellt. Im Folgenden wird durch ein nicht dargestelltes Motorsteuerungsgerät die Verbrennungskraftmaschine 2 auf einen Betriebspunkt, insbesondere eine Drehzahl, eingestellt. Gleichzeitig wird die Sekundärmaschine 3 als Bremsmaschine verwendet und die Betriebsparameter der Sekundärmaschine 2, im Falle einer Elektromaschine beispielsweise Drehzahl und fließender Strom, ausgelesen. Aus diesen Daten kann in Folge das aktuelle Drehmoment der Verbrennungskraftmaschine 2 bestimmt werden. In einem anderen Ausführungsbeispiel werden durch ein nicht dargestelltesThe measurement of the actual torque is performed as described below. First, the separating clutch 7 is opened, so that the hybrid drive device is completely decoupled from the other systems of the motor vehicle. Furthermore, a connection between the internal combustion engine 2 and the secondary engine 3 via the torque transmission device 4 by closing the clutch 5 is made. In the following, the internal combustion engine 2 is set to an operating point, in particular a rotational speed, by an engine control unit (not shown). At the same time the secondary machine 3 is used as a braking machine and the operating parameters of the secondary machine 2, in the case of an electric machine, for example, speed and flowing current, read out. From this data, the current torque of the internal combustion engine 2 can be determined in sequence. In another embodiment, by an unrepresented
Motorsteuerungsgerät mehrere Betriebspunkte zeitlich nacheinander angefahren, das jeweils anliegende Drehmoment bestimmt und in dem Motorsteuerungsgerät oder einem ebenfalls nicht dargestellten Speicher hinterlegt. Engine control unit several operating points in time sequentially approached, determines the respective applied torque and stored in the engine control unit or a memory, also not shown.

Claims

Ansprüche claims
1. Verfahren zur Bestimmung des Drehmoments einer1. Method for determining the torque of a
Verbrennungskraftmaschine für ein Kraftfahrzeug, insbesondere der Verbrennungskraftmaschine einer Kraftfahrzeug-Hybridantriebsvorrichtung, mit Hilfe mindestens einer an die Verbrennungskraftmaschine gekoppelten Sekundärmaschine, insbesondere einer Elektromaschine, wobei das Drehmoment der Verbrennungskraftmaschine (2) in mindestens einem Betriebspunkt durch Vergleich mit dem bekannten Drehmoment der Sekundärmaschine (3) bestimmt wird.Internal combustion engine for a motor vehicle, in particular the internal combustion engine of a motor vehicle hybrid drive device, with the aid of at least one secondary machine coupled to the internal combustion engine, in particular an electric machine, wherein the torque of the internal combustion engine (2) in at least one operating point by comparison with the known torque of the secondary machine (3) is determined.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Verbrennungskraftmaschine (2) über eine Trennkupplung (5), insbesondere elektrische Schaltkupplung, mit der Sekundärmaschine (3) gekoppelt ist.2. The method according to claim 1, characterized in that the internal combustion engine (2) via a separating clutch (5), in particular electrical clutch, with the secondary machine (3) is coupled.
3. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Verbrennungskraftmaschine (2) und Sekundärmaschine (3) während der Drehmomentbestimmung von einem Antriebsstrang des Kraftfahrzeugs entkoppelt sind.3. The method according to one or more of the preceding claims, characterized in that the internal combustion engine (2) and secondary machine (3) are decoupled during the torque determination of a drive train of the motor vehicle.
4. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Sekundärmaschine (3) ein dem der Verbrennungskraftmaschine (2) entgegengerichtetes Drehmoment erzeugt.4. The method according to one or more of the preceding claims, characterized in that the secondary machine (3) generates a of the internal combustion engine (2) opposing torque.
5. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Drehmomentbestimmung innerhalb eines Drehzahlbereichs erfolgt.5. The method according to one or more of the preceding claims, characterized in that the torque is determined within a speed range.
6. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Drehzahlbereich automatisch mit Hilfe einer regelungstechnischen Vorrichtung durchfahren wird. 6. The method according to one or more of the preceding claims, characterized in that the speed range is automatically traversed by means of a control device.
7. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die die Drehmomentbestimmung betreffenden Daten in einem Speicher hinterlegt werden.7. The method according to one or more of the preceding claims, characterized in that the torque determination data are stored in a memory.
8. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Daten zur Aktualisierung von in einem Motorsteuerungsgerät hinterlegten Grundmotordaten verwendet werden.8. The method according to one or more of the preceding claims, characterized in that the data are used for updating stored in an engine control unit basic engine data.
9. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Beeinflussung der9. The method according to one or more of the preceding claims, characterized in that influencing the
Verbrennungskraftmaschine (2), insbesondere durch Störungen, durch die Bestimmung des Drehmoments detektiert wird.Internal combustion engine (2), in particular by disturbances, is detected by the determination of the torque.
10. Verfahren nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Bestimmung des Drehmoments der10. The method according to one or more of the preceding claims, characterized in that the determination of the torque of
Verbrennungskraftmaschine (2) im stationären Zustand, insbesondere auf einem Prüfstand, und/oder im Fahrbetrieb des Kraftfahrzeugs durchgeführt wird.Internal combustion engine (2) in the stationary state, in particular on a test bench, and / or is carried out while driving the motor vehicle.
11. Hybridantriebsvorrichtung (eines Kraftfahrzeugs), die zumindest zwei unterschiedliche Antriebsaggregate, insbesondere eine elektrische Maschine und eine Verbrennungskraftmaschine (2), aufweist, mit einer Vorrichtung zur Bestimmung des Drehmoments der Verbrennungskraftmaschine (2), nach dem Verfahren gemäß einem oder mehreren der vorhergehenden Ansprüche. 11. Hybrid drive device (of a motor vehicle) comprising at least two different drive units, in particular an electric machine and an internal combustion engine (2), with a device for determining the torque of the internal combustion engine (2), according to the method according to one or more of the preceding claims ,
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