DE102019215082B3 - Process for switching back in electrical operation and control unit for carrying out the process - Google Patents
Process for switching back in electrical operation and control unit for carrying out the process Download PDFInfo
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- DE102019215082B3 DE102019215082B3 DE102019215082.9A DE102019215082A DE102019215082B3 DE 102019215082 B3 DE102019215082 B3 DE 102019215082B3 DE 102019215082 A DE102019215082 A DE 102019215082A DE 102019215082 B3 DE102019215082 B3 DE 102019215082B3
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 53
- 238000002485 combustion reaction Methods 0.000 claims abstract description 36
- 239000007858 starting material Substances 0.000 claims abstract description 13
- 230000009977 dual effect Effects 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/442—Series-parallel switching type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/113—Stepped gearings with two input flow paths, e.g. double clutch transmission selection of one of the torque flow paths by the corresponding input clutch
-
- 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
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- B60W20/14—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion in conjunction with braking regeneration
-
- 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
- B60W20/30—Control strategies involving selection of transmission gear ratio
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18127—Regenerative braking
-
- 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
- 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
- B60W2710/10—Change speed gearings
- B60W2710/1005—Transmission ratio engaged
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- 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
- B60Y2400/42—Clutches or brakes
- B60Y2400/428—Double clutch arrangements; Dual clutches
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- 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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Verfahren zum Zurückschalten im elektrischen Betrieb eines Antriebsstrangs (10) mit einem Verbrennungsmotor (VM), einem Startergenerator (13) und einem Doppelkupplungsgetriebe (14) mit einem ersten und einem zweiten Teilgetriebe (TG1, TG2) und einer elektrischen Maschine (EM), die an eines der Teilgetriebe (TG1, TG2) angebunden ist und Energie durch Rekuperieren zurückgewinnt, wobei in Teilgetriebe, an dem die elektrische Maschinen (EM) angebunden ist, eine Gangwechsel zu einem niedrigeren Gang erfolgt, indem das andere Teilgetriebe während des Schaltvorgangs ein Stützmoment mit einer zugeordneten, schleifenden Kupplung (K1) und dem stehenden Verbrennungsmotor (VM) bereitstellt.Method for downshifting in electrical operation of a drive train (10) with an internal combustion engine (VM), a starter generator (13) and a dual clutch transmission (14) with a first and a second sub-transmission (TG1, TG2) and an electric machine (EM), which is connected to one of the sub-transmissions (TG1, TG2) and recuperates energy, whereby a gear change to a lower gear takes place in the sub-transmission to which the electrical machine (EM) is connected, in that the other sub-transmission provides a supporting torque during the shifting process an assigned, slipping clutch (K1) and the stationary internal combustion engine (VM).
Description
Die Erfindung betrifft ein Verfahren zum Zurückschalten im elektrischen Betrieb, sowie Steuergerät zur Durchführung des Verfahrens.The invention relates to a method for downshifting in electrical operation, as well as a control device for performing the method.
Stand der TechnikState of the art
Auf dem Gebiet der Fahrzeuggetriebe sind seit längerem sog. Doppelkupplungsgetriebe erfolgreich. Diese basieren vom Getriebe-Aufbau her auf manuellen Schaltgetrieben in Vorgelegebauweise. Ein erstes und ein zweites Teilgetriebe sind dabei ineinander verschachtelt und können unabhängig voneinander über die jeweils zugeordnete Reibkupplung mit einer Antriebseinheit wie einem Verbrennungsmotor verbunden werden. Durch Überschneiden der Betätigung der zwei Reibkupplungen können Gangwechsel ohne Zugkrafteinbruch durchgeführt werden.So-called dual clutch transmissions have long been successful in the field of vehicle transmissions. In terms of the gearbox structure, these are based on manual gearboxes in countershaft design. A first and a second partial transmission are nested in one another and can be connected to a drive unit such as an internal combustion engine independently of one another via the respective associated friction clutch. By overlapping the actuation of the two friction clutches, gear changes can be carried out without a drop in tractive force.
Zudem besteht ein Trend hin zu sogenannten Hybrid-Antriebseinheiten, bei denen eine erste Antriebseinheit wie ein Verbrennungsmotor mit einer elektrischen Maschine als zweiter Antriebseinheit kombiniert werden. Zur Hybridisierung von Doppelkupplungsgetrieben sind unterschiedliche Konzepte bekannt.In addition, there is a trend towards so-called hybrid drive units, in which a first drive unit such as an internal combustion engine is combined with an electric machine as the second drive unit. Different concepts are known for the hybridization of dual clutch transmissions.
Beispielsweise ist es bekannt, zwischen den Reibkupplungen und der ersten Antriebseinheit eine elektrische Maschine vorzusehen. Hierbei kann zwischen der elektrischen Maschine und der ersten Antriebseinheit eine Reibkupplung vorgesehen sein. Die Antriebsleistung der elektrischen Maschine kann über die erste Reibkupplung oder die zweite Reibkupplung in das erste oder das zweite Getriebe eingespeist werden.For example, it is known to provide an electrical machine between the friction clutches and the first drive unit. A friction clutch can be provided between the electrical machine and the first drive unit. The drive power of the electric machine can be fed into the first or the second transmission via the first friction clutch or the second friction clutch.
Aus der
Wenn das Fahrzeug im Segelbetrieb fährt, wird der Verbrennungsmotor abgeschaltet und die kinetische Energie über die Räder und die elektrische Maschine im Doppelkupplungsgetriebe rekuperiert.When the vehicle drives in coasting mode, the combustion engine is switched off and the kinetic energy is recuperated via the wheels and the electric machine in the dual clutch transmission.
Aus der
Es ist Aufgabe der Erfindung, die elektrische Maschine im Rekuperationsbetrieb im optimalen Betriebspunkt zu betreiben und dieses komfortabel umzusetzen.The object of the invention is to operate the electrical machine in recuperation mode at the optimal operating point and to implement this comfortably.
Beschreibung der ErfindungDescription of the invention
Die Aufgabe wird gelöst mit einem Verfahren zum Zurückschalten im elektrischen Betrieb eines Antriebsstrangs mit einem Verbrennungsmotor, einem Startergenerator und einem Doppelkupplungsgetriebe mit einem ersten und einem zweiten Teilgetriebe und einer elektrischen Maschine, die an eines der Teilgetriebe angebunden ist und Energie durch Rekuperieren zurückgewinnt, wobei in Teilgetriebe, an dem die elektrische Maschinen angebunden ist, eine Gangwechsel zu einem niedrigeren Gang erfolgt, indem das andere Teilgetriebe während des Schaltvorgangs ein Stützmoment mit einer zugeordneten, schleifenden Kupplung und dem stehenden Verbrennungsmotor bereitstellt.The object is achieved with a method for downshifting in electrical operation of a drive train with an internal combustion engine, a starter generator and a dual clutch transmission with a first and a second sub-transmission and an electric machine that is connected to one of the sub-transmissions and recovers energy through recuperation, in Sub-transmission to which the electrical machine is connected, a gear change to a lower gear takes place in that the other sub-transmission provides a supporting torque with an assigned, slipping clutch and the stationary internal combustion engine during the shifting process.
Dabei ist es notwendig, dass der Verbrennungsmotor ein Stützmoment bereitstellt, das unterhalb der Losbrechmoments des Verbrennungsmotors liegt.It is necessary that the internal combustion engine provides a supporting torque that is below the breakaway torque of the internal combustion engine.
Erreicht wird das dadurch, dass der Verbrennungsmotor über den Startergenerator ein kompensierendes Drehmoment erhält.This is achieved by the internal combustion engine receiving a compensating torque via the starter generator.
Die Aufgabe wird zudem von einer Steuerung zur Durchführung des Verfahrens gelöst, wobei die Steuerung eine Motorsteuerung und/oder eine Getriebesteuerung mit jeweiligen Datenaustausch ist.The object is also achieved by a control for carrying out the method, the control being an engine control and / or a transmission control with respective data exchange.
Das Verfahren erlaubt das nahezu konstante Abbremsen mit rekuperierender elektrischer Maschine auch unter der Bedingung des Rückschaltens, ohne dass der Fahrer einen merklichen Lastwechsel verspürt.The method allows the almost constant braking with the recuperating electrical machine, even under the condition of downshifting, without the driver noticing a noticeable change in load.
Durch den Einsatz des Startergenerators ergibt sich eine verbesserte Wiederholbarkeit und Einstellbarkeit des Stützmoments, da das passive Schleppmoment des Verbrennungsmotors nicht immer exakt bekannt ist. Die Drehmomentschwelle des Verbrennungsmotors, bei der eine Drehzahl von Null garantiert ist, steigt an.The use of the starter generator results in improved repeatability and adjustability of the supporting torque, since the passive drag torque of the internal combustion engine is not always exactly known. The torque threshold of the internal combustion engine, at which a speed of zero is guaranteed, increases.
FigurenlisteFigure list
Die Erfindung wird nachfolgend beispielhaft unter Bezugnahme auf die beigefügte Zeichnung beschrieben.
-
1 zeigt eine schematische Darstellung der Hybrid-Architektur -
2 zeigt den Momentenfluss für die erfindungsgemäßen Lösung
-
1 shows a schematic representation of the hybrid architecture -
2 shows the torque flow for the solution according to the invention
In
Die erfindungsgemäße Lösung benötigt sowohl das hybridisierte Doppelkupplungsgetriebe als auch den Startergenerator.The solution according to the invention requires both the hybridized dual clutch transmission and the starter generator.
Der Antriebsstrang
Das Doppelkupplungsgetriebe
Das Doppelkupplungsgetriebe
Ferner beinhaltet der Antriebsstrang
Die elektrische Maschine
Die Anbindung der elektrischen Maschine
Alternativ dazu ist die elektrische Maschine an das erste Teilgetriebe TG1 angebunden.Alternatively, the electrical machine is connected to the first partial transmission TG1.
Der Antriebsstrang
Ferner kann ein zweiter hybridischer Antriebsmodus eingerichtet werden, bei dem Antriebsleistung sowohl von dem Verbrennungsmotor
Schließlich ist ein dritter Antriebsmodus möglich, bei dem nur die elektrische Maschine
In diesem dritten Antriebsmodus rekuperiert die elektrische Maschine
Ausgangspunkt der Erfindung ist dabei, dass die elektrische Maschine
Daher ist es sinnvoll einen Gangwechsel in dem Teilgetriebe, an dem die elektrische Maschine angebunden ist, vorzunehmen, um die elektrische Maschine in einem optimalen Betriebspunkt zu betreiben.Therefore, it makes sense to change gear in the partial transmission to which the electrical machine is connected in order to operate the electrical machine at an optimal operating point.
Um den Gang zu wechseln, muss aber die elektrische Maschinen
Als erste Maßnahme versucht man über eine auf Schlupf arbeitende Kupplung
Dabei darf das Stützmoment des Verbrennungsmotors nicht über die Schwelle kommen, die für das Losbrechen des Verbrennungsmotors bekannt ist.The supporting torque of the internal combustion engine must not exceed the threshold that is known for the internal combustion engine to break loose.
Damit ist das zu erreichende Stützmoment durch das Losbrechmoment des Verbrennungsmotors begrenzt und reicht je nach Anforderung nicht aus, um das Fahrerwunschmoment am Rad konstant zu halten.The support torque to be achieved is therefore limited by the breakaway torque of the internal combustion engine and, depending on the requirements, is not sufficient to keep the torque requested by the driver on the wheel constant.
Das erfindungsgemäße Verfahren, beziehungsweise der Verlauf des Moments ist in der
Sobald der niedrigere Gang im zweiten Teilgetriebe
Das als Beispiel beschriebene Verfahren verläuft analog mit einer elektrischen Maschine, die am ersten Teilgetriebe angebunden ist.The method described as an example runs analogously with an electrical machine that is connected to the first partial transmission.
Die Realisierung der erfindungsgemäßen Methode erfolgt in einer Softwarelösung, die in der Fahrzeugsteuerung, genauer entweder in einer Motorsteuerung, einer Getriebesteuerung oder einer Kombination der Steuerungen enthalten sein kann.The method according to the invention is implemented in a software solution which can be contained in the vehicle control, more precisely either in an engine control, a transmission control or a combination of the controls.
BezugszeichenlisteList of reference symbols
- 1010
- AntriebsstrangPowertrain
- 1313
- StartergeneratorStarter generator
- VMVM
- VerbrennungsmotorInternal combustion engine
- 1414th
- DoppelkupplungsgetriebeDouble clutch
- 1616
- Differenzialdifferential
- 18 L, 18 R18 L, 18 R
- rechtes und linkes Radright and left wheel
- 3030th
- erste Reibungskupplungfirst friction clutch
- 3434
- SchaltkupplungClutch
- 3636
- erster Leistungsübertragungspfadfirst power transmission path
- 2020th
- zweite Reibkupplungsecond friction clutch
- 2424
- zweite Schaltkupplungsecond clutch
- 2626th
- zweiter Leistungsübertragungspfadsecond power transmission path
- 4242
- Steuerungcontrol
- EMEM
- elektrische Maschineelectric machine
- TG1 TG 1
- erstes Teilgetriebefirst partial transmission
- TG2 TG 2
- zweites Teilgetriebesecond partial transmission
Claims (3)
Priority Applications (1)
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DE102019215082.9A DE102019215082B3 (en) | 2019-09-30 | 2019-09-30 | Process for switching back in electrical operation and control unit for carrying out the process |
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DE102019215082.9A DE102019215082B3 (en) | 2019-09-30 | 2019-09-30 | Process for switching back in electrical operation and control unit for carrying out the process |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041565A1 (en) * | 2008-08-26 | 2010-03-04 | Robert Bosch Gmbh | Method for operating a hybrid drive device of a motor vehicle and hybrid drive device and electronic control unit |
DE102017216984A1 (en) * | 2017-09-25 | 2019-03-28 | GETRAG B.V. & Co. KG | Method for controlling a stepped transmission and a drive train, and control device and drive train |
-
2019
- 2019-09-30 DE DE102019215082.9A patent/DE102019215082B3/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008041565A1 (en) * | 2008-08-26 | 2010-03-04 | Robert Bosch Gmbh | Method for operating a hybrid drive device of a motor vehicle and hybrid drive device and electronic control unit |
DE102017216984A1 (en) * | 2017-09-25 | 2019-03-28 | GETRAG B.V. & Co. KG | Method for controlling a stepped transmission and a drive train, and control device and drive train |
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