DE102019212693B4 - Method for shifting a transmission in a drive train - Google Patents

Method for shifting a transmission in a drive train Download PDF

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Publication number
DE102019212693B4
DE102019212693B4 DE102019212693.6A DE102019212693A DE102019212693B4 DE 102019212693 B4 DE102019212693 B4 DE 102019212693B4 DE 102019212693 A DE102019212693 A DE 102019212693A DE 102019212693 B4 DE102019212693 B4 DE 102019212693B4
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transmission
clutch
sub
gear
combustion engine
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DE102019212693A1 (en
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Jens Gullasch
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Magna PT BV and Co KG
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Magna PT BV and Co KG
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    • 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
    • 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
    • B60K6/22—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 apparatus, components or means specially adapted for HEVs
    • B60K6/38—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 apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
    • 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
    • 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
    • B60W20/15—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
    • 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
    • B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • 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
    • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H2061/0425—Bridging torque interruption
    • F16H2061/0429—Bridging torque interruption by torque supply with a clutch in parallel torque path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0043—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising four forward speeds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/006—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion power being selectively transmitted by either one of the parallel flow paths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/68—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings
    • F16H61/684—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive
    • F16H61/688—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by clutches
    • 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)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

Es wird ein Verfahren zum Schalten eines Getriebes in einem Antriebsstrang vorgeschlagen, mit einem Verbrennungsmotor und einer elektrischen Maschine mit einem Doppelkupplungsgetriebe mit einem ersten und zweiten Teilgetriebe und den Teilgetrieben jeweils zugeordneten Kupplungen, wobei die elektrische Maschine in ein Teilgetriebe eintreibt, an dem die Gangstufen 2 und 4 angeordnet sind, wobei zum zugunterbrechungsfreien Schalten zwischen zwei Gangstufen in rein elektrischer Fahrt eine Gangstufe auf dem anderen Teilgetriebe und der Verbrennungsmotor als Schwungspeicher verwendet werden.A method for shifting a transmission in a drive train is proposed, with an internal combustion engine and an electric machine with a double clutch transmission with a first and second sub-transmission and clutches assigned to the sub-transmissions, the electric machine driving into a sub-transmission on which the gear stages 2 and 4 are arranged, with one gear on the other sub-transmission and the internal combustion engine being used as a momentum accumulator for uninterrupted shifting between two gears in purely electric driving.

Description

Die Erfindung betrifft ein Verfahren zum Schalten eines Getriebes in einem Antriebsstrang mit einem Verbrennungsmotor und einer elektrischen Maschine mit einem Doppelkupplungsgetriebe mit einem ersten und zweiten Teilgetriebe und den Teilgetrieben jeweils zugeordneten Kupplungen, wobei die elektrische Maschine in ein Teilgetriebe eintreibt, an dem die Gangstufen 2 und 4 angeordnet sind.The invention relates to a method for shifting a transmission in a drive train with an internal combustion engine and an electric machine with a dual clutch transmission with a first and second sub-transmission and clutches assigned to the sub-transmissions, the electric machine driving into a sub-transmission on which the gear steps 2 and 4th are arranged.

Stand der TechnikState of the art

Doppelkupplungsgetriebe sind als Stufengetriebe für die Anwendung in Kraftfahrzeugen allgemein bekannt. Der Aufbau eines Doppelkupplungsgetriebes umfasst zwei unabhängig voneinander ansteuerbare Reibkupplungen, die Antriebsleistung auf je eines der beiden Teilgetriebe übertragen. Einem Teilgetriebe sind je eine Eingangswelle und darauf angeordnete Festräder zugeordnet, die wiederum in Zahneingriff mit Losrädern stehen und Radpaarungen ausbilden. In dem gerade aktiven Teilgetriebe ist eine Eingangswelle mit einer Reibkupplung und zudem eine einer Vorwärtsfahrstufe zugeordnete Radpaarung und deren Losrad mit einer Abtriebswelle wirkverbunden, sodass die Antriebsleistung von dem Verbrennungsmotor über das aktive Teilgetriebe hin zu dem Abtrieb und den Rädern übertragen werden kann. Das passive Teilgetriebe und dessen Eingangswelle sind in diesem Fall nicht mit der zugeordneten Reibkupplung verbunden.Double clutch transmissions are generally known as multi-step transmissions for use in motor vehicles. The structure of a dual clutch transmission includes two independently controllable friction clutches, which each transmit drive power to one of the two sub-transmissions. An input shaft and fixed gears arranged on it are assigned to each sub-transmission, which in turn mesh with idler gears and form gear pairs. In the currently active sub-transmission, an input shaft with a friction clutch and also a wheel pairing assigned to a forward gear and its idler gear are operatively connected to an output shaft so that the drive power can be transmitted from the internal combustion engine via the active sub-transmission to the output and the wheels. In this case, the passive sub-transmission and its input shaft are not connected to the associated friction clutch.

So wird es ermöglicht, ein einer Vorwärtsfahrstufe zugeordnetes Losrad des passiven Teilgetriebes mit der Abtriebswelle zu verbinden. Ein zugkraftunterbrechungsfreier Gangwechsel erfolgt, in dem die Reibkupplung des derzeit aktiven Teilgetriebes öffnet und überlappend dazu die andere Reibkupplung des geraden passiven Teilgetriebes schließt. Optional bietet es sich an, das Doppelkupplungsgetriebe auf einfacher Art und Weise zu „hybridisieren“, in dem der Elektromotor vorzugsweise an ein Teilgetriebe angebunden ist.This makes it possible to connect an idler gear of the passive sub-gear assigned to a forward gear to the output shaft. A gear change without interruption of tractive force takes place in which the friction clutch of the currently active sub-transmission opens and the other friction clutch of the straight passive sub-transmission closes with an overlap. Optionally, it is possible to “hybridize” the dual clutch transmission in a simple manner, in which the electric motor is preferably connected to a sub-transmission.

Aus der DE 10 2016 007 408 A1 sind unterschiedliche Ausführungsformen für hybridisierte Doppelkupplungsgetriebe mit der Anbindung der elektrischen Maschine an unterschiedliche Radsätze bekannt, wobei vier oder fünf Gangstufen verwendet werden.From the DE 10 2016 007 408 A1 Different embodiments for hybridized dual clutch transmissions with the connection of the electric machine to different gear sets are known, with four or five gear steps being used.

Ausgehend von einer solchen Anordnung, wie im Stand der Technik beschrieben, besteht der Wunsch, die elektrische Maschine zwischen zwei Gangstufen zu schalten.Based on such an arrangement, as described in the prior art, there is a desire to switch the electric machine between two gear stages.

Diese Schaltung soll dabei im rein elektrischen Antrieb zugunterbrechungsfrei sein.This circuit should be train-free in the purely electric drive.

Es ist Aufgabe der Erfindung ein Verfahren zum Schalten eines Doppelkupplungsgetriebes mit einer angebundenen elektrischen Maschine vorzuschlagen, das ein Schalten zwischen zwei Gangstufen für die elektrische Maschine ohne Unterbrechung des Zugs ermöglicht.It is the object of the invention to propose a method for shifting a dual clutch transmission with a connected electrical machine, which enables switching between two gear steps for the electrical machine without interrupting the train.

Beschreibung der ErfindungDescription of the invention

Die Aufgabe wird gelöst mit einem Verfahren zum Schalten eines Getriebes in einem Antriebsstrang mit einem Verbrennungsmotor und einer elektrischen Maschine mit einem Doppelkupplungsgetriebe mit einem ersten und zweiten Teilgetriebe und den Teilgetrieben jeweils zugeordneten Kupplungen, wobei die elektrische Maschine in ein Teilgetriebe eintreibt, an dem die Gangstufen 2 und 4 angeordnet sind, wobei zum zugunterbrechungsfreien Schalten zwischen zwei Gangstufen in rein elektrischer Fahrt eine Gangstufe auf dem anderen Teilgetriebe und der Verbrennungsmotor als Schwungspeicher verwendet werden.The object is achieved with a method for shifting a transmission in a drive train with an internal combustion engine and an electric machine with a double clutch transmission with a first and second sub-transmission and clutches assigned to the sub-transmissions, the electric machine driving into a sub-transmission on which the gear steps 2 and 4th are arranged, with one gear on the other sub-transmission and the internal combustion engine being used as a momentum accumulator for uninterrupted shifting between two gears in purely electric driving.

Die Verwendung der Schwungmasse des Verbrennungsmotors erlaubt es das Teilgetriebe, an das die elektrische Maschine angebunden ist, zu entlasten, ohne Antriebsleistung zu verlieren und ohne den Verbrennungsmotor zu starten. The use of the flywheel mass of the internal combustion engine allows the partial transmission to which the electrical machine is connected to be relieved without losing drive power and without starting the internal combustion engine.

Vorteilhafterweise wird zum Schalten zwischen Gangstufe 2 und 4 in rein elektrischer Fahrt die Gangstufe 3 auf dem anderen Teilgetriebe für den Übergang verwendet.Advantageously, it is used to switch between gears 2 and 4th the gear position in purely electric driving 3 used on the other sub-transmission for the transition.

Das erfindungsgemäße Verfahren erlaubt, dass die elektrische Maschine in einem Zwischenzustand zum Antrieb des Fahrzeugs und des Verbrennungsmotors dient.The method according to the invention allows the electrical machine to be used in an intermediate state to drive the vehicle and the internal combustion engine.

Das Verfahren zeichnet sich durch folgende Schritte aus:

  • • Fahren mit der elektrischen Maschine mit Gangstufe 2 im zweiten Teilgetriebe,
  • • Vorauswahl der Gangstufe 3 im ersten Teilgetriebe,
  • • Schließen der Kupplung K1,
  • • Betreiben der Kupplung K2 im Schlupfbetrieb,
  • • Auslegen der Gangstufe 2,
  • • Reduzierung der Drehzahl der elektrischen Maschine,
  • • Schließen der Kupplung K2,
  • • Stellen der Kupplung K1 in den Schlupfbetrieb bei steigender Drehzahl der elektrischen Maschine,
  • • Öffnen der Kupplung K2,
  • • Einlegen der Gangstufe 4 und Öffnen der Kupplung K1.
The procedure is characterized by the following steps:
  • • Driving with the electric machine in gear 2 in the second partial transmission,
  • • Preselection of gear 3 in the first partial transmission,
  • • Closing the clutch K1 ,
  • • Operating the clutch K2 in slip mode,
  • • Selecting the gear step 2 ,
  • • Reducing the speed of the electrical machine,
  • • Closing the clutch K2 ,
  • • Setting the clutch K1 into slip mode when the speed of the electrical machine increases,
  • • Opening the clutch K2 ,
  • • Engaging the gear 4th and opening the clutch K1 .

FigurenlisteFigure list

Die Erfindung wird nachfolgend beispielhaft unter Bezugnahme auf die beigefügten Zeichnungen beschrieben.

  • 1 bis 9 zeigen in schematischer Darstellung den Verlauf der Antriebsenergie während des Verfahrens.
The invention is described below by way of example with reference to the accompanying drawings.
  • 1 to 9 show in a schematic representation the course of the drive energy during the process.

In 1 ist ein Antriebsstrang 1 zu erkennen, der einen Verbrennungsmotor VM aufweist, der mit einer Doppelkupplung verbunden ist. Die Doppelkupplung besteht aus zwei Kupplungen K1 und K2, die unabhängig voneinander betätigbar sind. Dabei ist die Kupplung K1 dem ersten Teilgetriebe TG1 zugeordnet, die Kupplung K2 dem zweiten Teilgetriebe TG2. Die Verbrennungsmaschine ist dabei mit dem Kupplungskorb der beiden Kupplungen verbunden und kann somit getrennt auf jeweils eines oder beide Teilgetriebe geschaltet werden. Weiterhin weist der Antriebsstrang ein Getriebe 5 mit zwei Teilgetrieben TG1 und TG2 auf, die entlang von Antriebswellen A1 und A2 angeordnet sind. Die elektrische Maschine EM treibt über einen geeigneten Radsatz in das zweite Teilgetriebe TG2, genauer in den Radsatz für den vierten Gang ein, wobei die Schaltkupplung S2 entsprechenden geschaltet sein muss. ein. Auf der dem ersten Teilgetriebe zugeordneten Antriebswelle A1 sind die Gangstufen 3 und 1 angeordnet. Zwischen ihnen schaltet eine Schaltkupplung S1 die Gänge. Auf dem zweiten Teilgetriebe TG2 sind die Radsätze für die Gangstufen 2 und 4 auf der Antriebswelle A2 angeordnet. Eine Abtriebswelle 7 verbindet über einen Radsatz 6 die Abtriebsenergie mit den Antriebsrädern des Fahrzeugs, über beispielsweise ein Differential.In 1 is a powertrain 1 to recognize of an internal combustion engine VM has, which is connected to a double clutch. The double clutch consists of two clutches K1 and K2 that can be operated independently of one another. Here is the clutch K1 the first partial transmission TG1 assigned to the clutch K2 the second partial transmission TG2 . The internal combustion engine is connected to the clutch basket of the two clutches and can thus be switched separately to one or both sub-transmissions. The drive train also has a transmission 5 with two partial transmissions TG1 and TG2 on that along drive shafts A1 and A2 are arranged. The electric machine EM drives into the second partial transmission via a suitable gear set TG2 , more precisely in the gear set for fourth gear, with the clutch S2 must be switched accordingly. a. On the drive shaft assigned to the first partial transmission A1 are the gear steps 3 and 1 arranged. A clutch switches between them S1 the corridors. On the second part of the transmission TG2 are the gear sets for the gears 2 and 4th on the drive shaft A2 arranged. An output shaft 7th connects via a wheel set 6th the output energy with the drive wheels of the vehicle, for example via a differential.

Das erfindungsgemäße Verfahren beginnt mit einer Fahrsituation, in der der Verbrennungsmotor VM nicht aktiv ist und das Fahrzeug allein von der elektrischen Maschine EM angetrieben wird.The method according to the invention begins with a driving situation in which the internal combustion engine VM is not active and the vehicle is only powered by the electrical machine EM is driven.

Beide Kupplungen K1 und K2 sind geöffnet. Das Teilgetriebe TG 2 ist aktiv und die elektrische Maschine EM treibt in den Radsatz der Gangstufe 2 ein, die über die Schaltkupplung S2 aktiviert ist. Über die Abtriebswelle 7 wird die Energie auf die Antriebsräder geleitet, was in 1 mit den verdickten Linien und dem Pfeil dargestellt ist.Both clutches K1 and K2 are opened. The partial transmission TG 2 is active and the electric machine EM drives into the gear set of the gear stage 2 one that has the clutch S2 is activated. Via the output shaft 7th the energy is directed to the drive wheels, which in 1 is shown with the thick lines and the arrow.

Wenn es dem Fahrerwunsch entspricht, bzw. wenn die automatische Steuerung ein solches Verfahren vorsieht, soll die elektrische Maschine mit einer höheren Gangstufe betrieben werden.If it corresponds to the driver's request, or if the automatic control provides such a method, the electric machine should be operated at a higher gear.

Da die elektrische Maschine nur am Teilgetriebe TG2 angebunden ist, steht dazu nur die vierte Gangstufe zur Verfügung. Um diese Schaltung zugunterbrechungsfrei zu gestalten, müssen spezielle Vorkehrungen getroffen werden.Since the electric machine is only on the partial transmission TG2 is connected, only the fourth gear is available. In order to make this circuit train-free, special precautions must be taken.

Das erfindungsgemäße Verfahren sieht vor, dass als erster Schritt des Verfahrens im ersten Teilgetriebe TG1 die Gangstufe 3 eingelegt wird, was in 2 dargestellt ist. Dadurch wird über die Abtriebswelle 7 und die Antriebswelle A1 des ersten Teilgetriebes ein Drehmoment an der Kupplung K1 erzeugt.The method according to the invention provides that as the first step of the method in the first partial transmission TG1 the gear step 3 is inserted what is in 2 is shown. This is over the output shaft 7th and the drive shaft A1 of the first sub-transmission a torque on the clutch K1 generated.

Im nächsten Verfahrensschritt wird die Kupplung K1 geschlossen, wodurch das von der Antriebswelle A1 übertragenen Drehmoment am Verbrennungsmotor anliegt und diesen in Drehung versetzt.The next step is the clutch K1 closed, eliminating that of the drive shaft A1 transmitted torque is applied to the internal combustion engine and rotates it.

Anschließend wird die Kupplung K2 soweit geschlossen, dass sie mit Schlupf betrieben wird. Dadurch wird die Antriebswelle A2 als Pfad für die Antriebsenergie benutzt und die dritte Gangstufe treibt in die Abtriebswelle 7 zusammen mit der zweiten Gangstufe ein.Then the clutch K2 so closed that it is operated with slip. This will make the drive shaft A2 used as a path for the drive energy and the third gear drives into the output shaft 7th together with the second gear.

Die Energie, die über die elektrische Maschine EM in das Getriebe eingebracht wird, verteilt sich jetzt bereits auf den bisher verwendeten Antriebspfad sowie über das Schlupfen der Kupplung K2 auf den zweiten Antriebspfad. In 4 ist der Verlauf der Antriebsenergie mit den dickeren Pfeilen skizziert.The energy that goes through the electrical machine EM is introduced into the transmission, is now distributed over the previously used drive path as well as through the slipping of the clutch K2 on the second drive path. In 4th the course of the drive energy is sketched with the thicker arrows.

Im nächsten Schritt, siehe 5, wird die Gangstufe 2 ausgelegt, wodurch die gesamte Antriebsenergie über die Antriebswelle A2 auf die Kupplungen K2 und K1 trifft und von dort über die Gangstufe 3 sowie die geschlossene Schaltkupplung S1 auf die Abtriebswelle 7 übertragen wird. Parallel dazu wird Drehmoment am Verbrennungsmotor VM aufgebracht.In the next step, see 5 , becomes the gear step 2 designed, whereby the entire drive energy via the drive shaft A2 on the clutches K2 and K1 meets and from there over the gear step 3 as well as the closed clutch S1 on the output shaft 7th is transmitted. At the same time, torque is applied to the combustion engine VM upset.

Im nächsten Verfahrensschritt wird bei gleichbleibender Stellung aller Bauteile die Drehzahl der elektrischen Maschine reduziert siehe 5, sowie die Kupplung K2 komplett geschlossen, siehe 6. Damit wird das Teilgetriebe TG2 vollständig entlastet, der Abtrieb erfolgt in der Gangstufe 3 des ersten Teilgetriebes TG1.In the next process step, the speed of the electrical machine is reduced with all components in the same position, see 5 , as well as the clutch K2 completely closed, see 6th . This is the partial transmission TG2 Completely relieved, the output takes place in the gear stage 3 of the first partial transmission TG1 .

Anschließend wird die Kupplung K1 so weit geöffnet, dass sie im Schlupf betrieben wird und die Drehzahl der elektrischen Maschine EM wird wieder angehoben. Dadurch erfolgt über die Verbindung der Kupplungen K1 und K2 ein höherer energetischer Eintrag am Verbrennungsmotor VM. Der Verbrennungsmotor wird dabei in seine gewünschte Drehzahl beschleunigt. Er dient als Schwungspeicher für die nachfolgenden Schritte.Then the clutch K1 opened so wide that it is operated in slip and the speed of the electrical machine EM is raised again. This takes place via the connection of the couplings K1 and K2 a higher energetic input to the combustion engine VM . The internal combustion engine is accelerated to its desired speed. It serves as a swing memory for the following steps.

Als nächstes wird die Kupplung K2 geöffnet und die Drehzahl der elektrischen Maschine wiederum reduziert. Drehmoment bzw. Antriebsenergie wird dabei von der gespeicherten Schwungmasse des Verbrennungsmotors VM geliefert.Next up is the clutch K2 opened and the speed of the electrical machine reduced again. Torque or drive energy is taken from the stored flywheel mass of the internal combustion engine VM delivered.

Die Antriebsenergie verläuft dabei entlang der Kupplung K1, der Antriebswelle A1 und der dritten Gangstufe auf die Abtriebswelle 7.The drive energy runs along the clutch K1 , the drive shaft A1 and the third gear on the output shaft 7th .

Das Teilgetriebe TG2 kann in der Phase, in der die gespeicherte Energie des Verbrennungsmotors genutzt wird, in die vierte Gangstufe geschaltet werden, siehe 8. Die Synchronisierung der Drehzahl der elektrischen Maschine auf die von der Schwungmasse und der dritten Gangstufe vorgegebene Geschwindigkeit muss in einer kurzen Zeit erfolgen, in der die Drehzahl der Schwungmasse stark abnimmt. In einer Beispielrechnung wird dazu ein Wert von rund 0,1s ermittelt.The partial transmission TG2 can be switched to fourth gear in the phase in which the stored energy of the internal combustion engine is used, see 8th . The synchronization of the speed of the electric machine to the speed specified by the flywheel and the third gear must take place in a short time in which the speed of the flywheel decreases sharply. In an example calculation, a value of around 0.1s is determined for this.

Anschließend wird die Kupplung K1 geöffnet, siehe 9 und der Antrieb erfolgt über die vierte Gangstufe auf die Abtriebswelle 7.Then the clutch K1 open, see 9 and the drive takes place via the fourth gear on the output shaft 7th .

Claims (5)

Verfahren zum Schalten eines Getriebes (5) in einem Antriebsstrang (1) mit einem Verbrennungsmotor (VM) und einer elektrischen Maschine (EM) mit einem Doppelkupplungsgetriebe mit einem ersten und zweiten Teilgetriebe (TG1, TG2) und den Teilgetrieben (TG1, TG2) jeweils zugeordneten Kupplungen (K1, K2), wobei die elektrische Maschine (EM) in ein Teilgetriebe (TG2) eintreibt, an dem die Gangstufen 2 und 4 angeordnet sind, dadurch gekennzeichnet, dass zum zugunterbrechungsfreien Schalten zwischen zwei Gangstufen in rein elektrischer Fahrt eine Gangstufe auf dem anderen Teilgetriebe (TG1) und der Verbrennungsmotor (VM) als Schwungspeicher verwendet werden.Method for shifting a transmission (5) in a drive train (1) with an internal combustion engine (VM) and an electric machine (EM) with a double clutch transmission with a first and second partial transmission (TG1, TG2) and the partial transmissions (TG1, TG2) respectively associated clutches (K1, K2), wherein the electric machine (EM) drives into a sub-transmission (TG2) on which the gears 2 and 4 are arranged, characterized in that for train-interruption-free shifting between two gears in a purely electric drive the other sub-transmission (TG1) and the internal combustion engine (VM) can be used as a flywheel. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zum Schalten zwischen Gangstufe 2 und 4 in rein elektrischer Fahrt die Gangstufe 3 auf dem anderen Teilgetriebe (TG1) für den Übergang verwendet wird.Procedure according to Claim 1 , characterized in that for shifting between gear positions 2 and 4 in purely electric driving, gear position 3 on the other sub-transmission (TG1) is used for the transition. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die elektrische Maschine (EM) in einem Zwischenzustand zum Antrieb des Fahrzeugs und des Verbrennungsmotors (VM) dient.Procedure according to Claim 1 or 2 , characterized in that the electrical machine (EM) is used in an intermediate state to drive the vehicle and the internal combustion engine (VM). Verfahren nach Anspruch 1 oder 2 oder 3, durch folgende Schritte gekennzeichnet: • Fahren mit der elektrischen Maschine (EM) mit Gangstufe 2 im zweiten Teilgetriebe (TG2), • Vorauswahl der Gangstufe 3 im ersten Teilgetriebe (TG1) • Schließen der Kupplung K1, • Betreiben der Kupplung K2 im Schlupfbetrieb, • Auslegen der Gangstufe 2, • Reduzierung der Drehzahl der elektrischen Maschine (EM), • Schließen der Kupplung K2, • Stellen der Kupplung K1 in den Schlupfbetrieb bei steigender Drehzahl der elektrischen Maschine (EM), • Öffnen der Kupplung K2, • Einlegen der Gangstufe 4 und Öffnen der Kupplung K1.Procedure according to Claim 1 or 2 or 3 , characterized by the following steps: • Driving the electric machine (EM) with gear stage 2 in the second sub-transmission (TG2), • Preselecting gear stage 3 in the first sub-transmission (TG1) • Closing clutch K1, • Operating clutch K2 in slip mode, • disengaging gear stage 2, • reducing the speed of the electrical machine (EM), • engaging clutch K2, • placing clutch K1 in slip mode as the speed of the electrical machine (EM) increases, • opening clutch K2, • engaging the Gear stage 4 and opening the clutch K1. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Getriebe ein Viergang-Doppelkupplungsgetriebe ist.Method according to one of the preceding claims, characterized in that the transmission is a four-speed double clutch transmission.
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* Cited by examiner, † Cited by third party
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DE102016007408A1 (en) * 2016-06-20 2017-12-21 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg Double clutch

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